Add Synor Storage and Wallet SDKs for Swift

- Implement SynorStorage class for decentralized storage operations including upload, download, pinning, and CAR file management.
- Create supporting types and models for storage operations such as UploadOptions, Pin, and StorageConfig.
- Implement SynorWallet class for wallet operations including wallet creation, address generation, transaction signing, and balance queries.
- Create supporting types and models for wallet operations such as Wallet, Address, and Transaction.
- Introduce error handling for both storage and wallet operations.

sdk/c/CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.16)
-project(synor_compute VERSION 0.1.0 LANGUAGES C)
+project(synor_sdk VERSION 0.1.0 LANGUAGES C)
 
 set(CMAKE_C_STANDARD 11)
 set(CMAKE_C_STANDARD_REQUIRED ON)
@@ -11,51 +11,90 @@ option(BUILD_EXAMPLES "Build examples" ON)
 
 # Find dependencies
 find_package(CURL REQUIRED)
+find_package(PkgConfig QUIET)
+if(PkgConfig_FOUND)
+    pkg_check_modules(JANSSON jansson)
+endif()
+
+# If jansson not found via pkg-config, try find_library
+if(NOT JANSSON_FOUND)
+    find_library(JANSSON_LIBRARIES jansson)
+    find_path(JANSSON_INCLUDE_DIRS jansson.h)
+    if(JANSSON_LIBRARIES AND JANSSON_INCLUDE_DIRS)
+        set(JANSSON_FOUND TRUE)
+    endif()
+endif()
+
+if(NOT JANSSON_FOUND)
+    message(WARNING "jansson library not found. Using bundled JSON parser.")
+    set(USE_BUNDLED_JSON TRUE)
+endif()
 
 # Library sources
 set(SYNOR_SOURCES
     src/synor_compute.c
+    src/common.c
+    src/wallet/wallet.c
+    src/rpc/rpc.c
+    src/storage/storage.c
 )
 
 # Create library
-add_library(synor_compute ${SYNOR_SOURCES})
+add_library(synor_sdk ${SYNOR_SOURCES})
 
-target_include_directories(synor_compute
+target_include_directories(synor_sdk
     PUBLIC
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
         $<INSTALL_INTERFACE:include>
+    PRIVATE
+        ${JANSSON_INCLUDE_DIRS}
 )
 
-target_link_libraries(synor_compute
+target_link_libraries(synor_sdk
     PRIVATE
         CURL::libcurl
         m
 )
 
+if(JANSSON_FOUND)
+    target_link_libraries(synor_sdk PRIVATE ${JANSSON_LIBRARIES})
+    target_compile_definitions(synor_sdk PRIVATE HAVE_JANSSON)
+endif()
+
+# Platform-specific settings
+if(WIN32)
+    target_link_libraries(synor_sdk PRIVATE ws2_32)
+endif()
+
 # Set library properties
-set_target_properties(synor_compute PROPERTIES
+set_target_properties(synor_sdk PROPERTIES
     VERSION ${PROJECT_VERSION}
     SOVERSION ${PROJECT_VERSION_MAJOR}
-    PUBLIC_HEADER include/synor_compute.h
 )
 
 # Installation
 include(GNUInstallDirs)
 
-install(TARGETS synor_compute
-    EXPORT synor_compute-targets
+install(TARGETS synor_sdk
+    EXPORT synor_sdk-targets
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
-    PUBLIC_HEADER DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 
-install(EXPORT synor_compute-targets
-    FILE synor_compute-targets.cmake
-    NAMESPACE synor::
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/synor_compute
+install(DIRECTORY include/
+    DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 
+install(EXPORT synor_sdk-targets
+    FILE synor_sdk-targets.cmake
+    NAMESPACE synor::
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/synor_sdk
+)
+
+# Alias for backwards compatibility
+add_library(synor_compute ALIAS synor_sdk)
+
 # Tests
 if(BUILD_TESTS)
     enable_testing()

sdk/c/include/synor/rpc.h

@@ -0,0 +1,269 @@
+/**
+ * @file rpc.h
+ * @brief Synor RPC SDK for C
+ *
+ * Provides blockchain queries, transaction submission, and real-time
+ * subscriptions for the Synor blockchain.
+ */
+
+#ifndef SYNOR_RPC_H
+#define SYNOR_RPC_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include "wallet.h"  /* For synor_error_t, synor_network_t, synor_priority_t */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Transaction status */
+typedef enum {
+    SYNOR_TX_STATUS_PENDING = 0,
+    SYNOR_TX_STATUS_CONFIRMED,
+    SYNOR_TX_STATUS_FAILED
+} synor_tx_status_t;
+
+/* RPC configuration */
+typedef struct {
+    const char* api_key;
+    const char* endpoint;       /* Default: "https://rpc.synor.io/v1" */
+    const char* ws_endpoint;    /* Default: "wss://rpc.synor.io/v1/ws" */
+    synor_network_t network;    /* Default: SYNOR_NETWORK_MAINNET */
+    uint32_t timeout_ms;        /* Default: 30000 */
+    uint32_t retries;           /* Default: 3 */
+    bool debug;                 /* Default: false */
+} synor_rpc_config_t;
+
+/* Opaque RPC client handle */
+typedef struct synor_rpc synor_rpc_t;
+
+/* Block header */
+typedef struct {
+    char* hash;
+    int64_t height;
+    char* previous_hash;
+    int64_t timestamp;
+    int32_t version;
+    char* merkle_root;
+    int64_t nonce;
+    double difficulty;
+} synor_block_header_t;
+
+/* Script pubkey */
+typedef struct {
+    char* asm_str;
+    char* hex;
+    char* type;
+    char* address;  /* May be NULL */
+} synor_script_pubkey_t;
+
+/* Transaction input */
+typedef struct {
+    char* txid;
+    int32_t vout;
+    char* script_sig;  /* May be NULL */
+    int64_t sequence;
+    char** witness;
+    size_t witness_count;
+} synor_rpc_tx_input_t;
+
+/* Transaction output */
+typedef struct {
+    int64_t value;
+    int32_t n;
+    synor_script_pubkey_t script_pubkey;
+} synor_rpc_tx_output_t;
+
+/* Transaction */
+typedef struct {
+    char* txid;
+    char* hash;
+    int32_t version;
+    int32_t size;
+    int32_t weight;
+    int64_t lock_time;
+    synor_rpc_tx_input_t* inputs;
+    size_t input_count;
+    synor_rpc_tx_output_t* outputs;
+    size_t output_count;
+    int64_t fee;
+    int32_t confirmations;
+    char* block_hash;     /* May be NULL */
+    int64_t block_height; /* -1 if not in block */
+    int64_t timestamp;    /* -1 if unknown */
+    synor_tx_status_t status;
+} synor_rpc_transaction_t;
+
+/* Block */
+typedef struct {
+    char* hash;
+    int64_t height;
+    char* previous_hash;
+    int64_t timestamp;
+    int32_t version;
+    char* merkle_root;
+    int64_t nonce;
+    double difficulty;
+    synor_rpc_transaction_t* transactions;
+    size_t transaction_count;
+    int32_t size;
+    int32_t weight;
+} synor_block_t;
+
+/* Chain info */
+typedef struct {
+    char* chain;
+    int64_t blocks;
+    int64_t headers;
+    char* best_block_hash;
+    double difficulty;
+    int64_t median_time;
+    double verification_progress;
+    char* chain_work;
+    bool pruned;
+} synor_chain_info_t;
+
+/* Mempool info */
+typedef struct {
+    int32_t size;
+    int64_t bytes;
+    int64_t usage;
+    int64_t max_mempool;
+    double mempool_min_fee;
+    double min_relay_tx_fee;
+} synor_mempool_info_t;
+
+/* Fee estimate */
+typedef struct {
+    synor_priority_t priority;
+    int64_t fee_rate;
+    int32_t estimated_blocks;
+} synor_fee_estimate_t;
+
+/* Submit result */
+typedef struct {
+    char* txid;
+    bool accepted;
+    char* reason;  /* May be NULL */
+} synor_submit_result_t;
+
+/* Subscription handle */
+typedef struct synor_subscription synor_subscription_t;
+
+/* Subscription callbacks */
+typedef void (*synor_block_callback_t)(const synor_block_t* block, void* user_data);
+typedef void (*synor_tx_callback_t)(const synor_rpc_transaction_t* tx, void* user_data);
+
+/**
+ * Create a new RPC client.
+ */
+synor_rpc_t* synor_rpc_create(const synor_rpc_config_t* config);
+
+/**
+ * Destroy RPC client and free resources.
+ */
+void synor_rpc_destroy(synor_rpc_t* rpc);
+
+/* Block operations */
+
+synor_error_t synor_rpc_get_latest_block(
+    synor_rpc_t* rpc,
+    synor_block_t* result
+);
+
+synor_error_t synor_rpc_get_block(
+    synor_rpc_t* rpc,
+    const char* hash_or_height,
+    synor_block_t* result
+);
+
+synor_error_t synor_rpc_get_block_header(
+    synor_rpc_t* rpc,
+    const char* hash_or_height,
+    synor_block_header_t* result
+);
+
+/* Transaction operations */
+
+synor_error_t synor_rpc_get_transaction(
+    synor_rpc_t* rpc,
+    const char* txid,
+    synor_rpc_transaction_t* result
+);
+
+synor_error_t synor_rpc_get_raw_transaction(
+    synor_rpc_t* rpc,
+    const char* txid,
+    char** hex
+);
+
+synor_error_t synor_rpc_send_raw_transaction(
+    synor_rpc_t* rpc,
+    const char* hex,
+    synor_submit_result_t* result
+);
+
+synor_error_t synor_rpc_decode_raw_transaction(
+    synor_rpc_t* rpc,
+    const char* hex,
+    synor_rpc_transaction_t* result
+);
+
+/* Fee estimation */
+
+synor_error_t synor_rpc_estimate_fee(
+    synor_rpc_t* rpc,
+    synor_priority_t priority,
+    synor_fee_estimate_t* result
+);
+
+/* Chain information */
+
+synor_error_t synor_rpc_get_chain_info(
+    synor_rpc_t* rpc,
+    synor_chain_info_t* result
+);
+
+synor_error_t synor_rpc_get_mempool_info(
+    synor_rpc_t* rpc,
+    synor_mempool_info_t* result
+);
+
+/* Subscriptions */
+
+synor_subscription_t* synor_rpc_subscribe_blocks(
+    synor_rpc_t* rpc,
+    synor_block_callback_t callback,
+    void* user_data
+);
+
+synor_subscription_t* synor_rpc_subscribe_address(
+    synor_rpc_t* rpc,
+    const char* address,
+    synor_tx_callback_t callback,
+    void* user_data
+);
+
+synor_subscription_t* synor_rpc_subscribe_mempool(
+    synor_rpc_t* rpc,
+    synor_tx_callback_t callback,
+    void* user_data
+);
+
+void synor_subscription_cancel(synor_subscription_t* sub);
+
+/* Free functions */
+void synor_block_header_free(synor_block_header_t* header);
+void synor_block_free(synor_block_t* block);
+void synor_rpc_transaction_free(synor_rpc_transaction_t* tx);
+void synor_chain_info_free(synor_chain_info_t* info);
+void synor_mempool_info_free(synor_mempool_info_t* info);
+void synor_submit_result_free(synor_submit_result_t* result);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SYNOR_RPC_H */

sdk/c/include/synor/storage.h

@@ -0,0 +1,282 @@
+/**
+ * @file storage.h
+ * @brief Synor Storage SDK for C
+ *
+ * Provides IPFS-compatible decentralized storage with upload, download,
+ * pinning, and CAR file operations.
+ */
+
+#ifndef SYNOR_STORAGE_H
+#define SYNOR_STORAGE_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+#include "wallet.h"  /* For synor_error_t */
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Pin status */
+typedef enum {
+    SYNOR_PIN_STATUS_QUEUED = 0,
+    SYNOR_PIN_STATUS_PINNING,
+    SYNOR_PIN_STATUS_PINNED,
+    SYNOR_PIN_STATUS_FAILED,
+    SYNOR_PIN_STATUS_UNPINNED
+} synor_pin_status_t;
+
+/* Hash algorithm */
+typedef enum {
+    SYNOR_HASH_SHA2_256 = 0,
+    SYNOR_HASH_BLAKE3
+} synor_hash_algorithm_t;
+
+/* Entry type */
+typedef enum {
+    SYNOR_ENTRY_FILE = 0,
+    SYNOR_ENTRY_DIRECTORY
+} synor_entry_type_t;
+
+/* Storage configuration */
+typedef struct {
+    const char* api_key;
+    const char* endpoint;   /* Default: "https://storage.synor.io/v1" */
+    const char* gateway;    /* Default: "https://gateway.synor.io" */
+    uint32_t timeout_ms;    /* Default: 60000 */
+    uint32_t retries;       /* Default: 3 */
+    bool debug;             /* Default: false */
+} synor_storage_config_t;
+
+/* Opaque storage client handle */
+typedef struct synor_storage synor_storage_t;
+
+/* Upload options */
+typedef struct {
+    const char* name;           /* May be NULL */
+    bool wrap_with_directory;   /* Default: false */
+    synor_hash_algorithm_t hash_algorithm;  /* Default: SHA2_256 */
+    int32_t chunk_size;         /* 0 for default */
+    int32_t pin_duration_days;  /* 0 for default */
+} synor_upload_options_t;
+
+/* Upload response */
+typedef struct {
+    char* cid;
+    int64_t size;
+    char* name;        /* May be NULL */
+    char* created_at;
+} synor_upload_response_t;
+
+/* Pin info */
+typedef struct {
+    char* cid;
+    char* name;        /* May be NULL */
+    synor_pin_status_t status;
+    int64_t size;
+    char* created_at;
+    char* expires_at;  /* May be NULL */
+    char** delegates;
+    size_t delegate_count;
+} synor_pin_t;
+
+/* Pin request */
+typedef struct {
+    const char* cid;
+    const char* name;       /* May be NULL */
+    int32_t duration_days;  /* 0 for default */
+    const char** origins;
+    size_t origin_count;
+} synor_pin_request_t;
+
+/* Pin list */
+typedef struct {
+    synor_pin_t* pins;
+    size_t count;
+} synor_pin_list_t;
+
+/* CAR file info */
+typedef struct {
+    char* cid;
+    int64_t size;
+    char** roots;
+    size_t root_count;
+    char* created_at;
+} synor_car_file_t;
+
+/* File entry for upload */
+typedef struct {
+    const char* path;
+    const uint8_t* content;
+    size_t content_size;
+} synor_file_entry_t;
+
+/* Directory entry */
+typedef struct {
+    char* name;
+    char* cid;
+    int64_t size;
+    synor_entry_type_t type;
+} synor_directory_entry_t;
+
+/* Directory listing */
+typedef struct {
+    synor_directory_entry_t* entries;
+    size_t count;
+} synor_directory_listing_t;
+
+/* Storage statistics */
+typedef struct {
+    int64_t total_size;
+    int32_t pin_count;
+    int64_t bandwidth_used;
+    double quota_used;
+} synor_storage_stats_t;
+
+/* CID list (for CAR import) */
+typedef struct {
+    char** cids;
+    size_t count;
+} synor_cid_list_t;
+
+/* Download callback for streaming */
+typedef void (*synor_download_callback_t)(
+    const uint8_t* data,
+    size_t size,
+    void* user_data
+);
+
+/**
+ * Create a new storage client.
+ */
+synor_storage_t* synor_storage_create(const synor_storage_config_t* config);
+
+/**
+ * Destroy storage client and free resources.
+ */
+void synor_storage_destroy(synor_storage_t* storage);
+
+/* Upload operations */
+
+synor_error_t synor_storage_upload(
+    synor_storage_t* storage,
+    const uint8_t* data,
+    size_t size,
+    const synor_upload_options_t* options,
+    synor_upload_response_t* result
+);
+
+synor_error_t synor_storage_upload_directory(
+    synor_storage_t* storage,
+    const synor_file_entry_t* files,
+    size_t file_count,
+    const char* dir_name,
+    synor_upload_response_t* result
+);
+
+/* Download operations */
+
+synor_error_t synor_storage_download(
+    synor_storage_t* storage,
+    const char* cid,
+    uint8_t** data,
+    size_t* size
+);
+
+synor_error_t synor_storage_download_stream(
+    synor_storage_t* storage,
+    const char* cid,
+    synor_download_callback_t callback,
+    void* user_data
+);
+
+/**
+ * Get gateway URL for content.
+ * Caller must free the returned string.
+ */
+char* synor_storage_get_gateway_url(
+    synor_storage_t* storage,
+    const char* cid,
+    const char* path  /* May be NULL */
+);
+
+/* Pinning operations */
+
+synor_error_t synor_storage_pin(
+    synor_storage_t* storage,
+    const synor_pin_request_t* request,
+    synor_pin_t* result
+);
+
+synor_error_t synor_storage_unpin(
+    synor_storage_t* storage,
+    const char* cid
+);
+
+synor_error_t synor_storage_get_pin_status(
+    synor_storage_t* storage,
+    const char* cid,
+    synor_pin_t* result
+);
+
+synor_error_t synor_storage_list_pins(
+    synor_storage_t* storage,
+    synor_pin_status_t* status,  /* NULL for all */
+    int32_t limit,
+    int32_t offset,
+    synor_pin_list_t* result
+);
+
+/* CAR file operations */
+
+synor_error_t synor_storage_create_car(
+    synor_storage_t* storage,
+    const synor_file_entry_t* entries,
+    size_t entry_count,
+    synor_car_file_t* result
+);
+
+synor_error_t synor_storage_import_car(
+    synor_storage_t* storage,
+    const uint8_t* car_data,
+    size_t car_size,
+    synor_cid_list_t* result
+);
+
+synor_error_t synor_storage_export_car(
+    synor_storage_t* storage,
+    const char* cid,
+    uint8_t** data,
+    size_t* size
+);
+
+/* Directory operations */
+
+synor_error_t synor_storage_list_directory(
+    synor_storage_t* storage,
+    const char* cid,
+    synor_directory_listing_t* result
+);
+
+/* Statistics */
+
+synor_error_t synor_storage_get_stats(
+    synor_storage_t* storage,
+    synor_storage_stats_t* result
+);
+
+/* Free functions */
+void synor_upload_response_free(synor_upload_response_t* response);
+void synor_pin_free(synor_pin_t* pin);
+void synor_pin_list_free(synor_pin_list_t* list);
+void synor_car_file_free(synor_car_file_t* car);
+void synor_cid_list_free(synor_cid_list_t* list);
+void synor_directory_entry_free(synor_directory_entry_t* entry);
+void synor_directory_listing_free(synor_directory_listing_t* listing);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SYNOR_STORAGE_H */

sdk/c/include/synor/wallet.h

@@ -0,0 +1,399 @@
+/**
+ * @file wallet.h
+ * @brief Synor Wallet SDK for C
+ *
+ * Provides key management, transaction signing, and balance queries
+ * for the Synor blockchain.
+ *
+ * @example
+ * ```c
+ * #include <synor/wallet.h>
+ *
+ * int main() {
+ *     synor_wallet_config_t config = {
+ *         .api_key = "your-api-key",
+ *         .endpoint = "https://wallet.synor.io/v1",
+ *         .network = SYNOR_NETWORK_MAINNET,
+ *         .timeout_ms = 30000,
+ *         .retries = 3
+ *     };
+ *
+ *     synor_wallet_t* wallet = synor_wallet_create(&config);
+ *     if (!wallet) {
+ *         fprintf(stderr, "Failed to create wallet client\n");
+ *         return 1;
+ *     }
+ *
+ *     synor_create_wallet_result_t result;
+ *     synor_error_t err = synor_wallet_create_wallet(wallet, SYNOR_WALLET_STANDARD, &result);
+ *     if (err == SYNOR_OK) {
+ *         printf("Wallet ID: %s\n", result.wallet.id);
+ *         printf("Mnemonic: %s\n", result.mnemonic);
+ *         synor_create_wallet_result_free(&result);
+ *     }
+ *
+ *     synor_wallet_destroy(wallet);
+ *     return 0;
+ * }
+ * ```
+ */
+
+#ifndef SYNOR_WALLET_H
+#define SYNOR_WALLET_H
+
+#include <stdint.h>
+#include <stddef.h>
+#include <stdbool.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/* Error codes */
+typedef enum {
+    SYNOR_OK = 0,
+    SYNOR_ERROR_INVALID_ARGUMENT,
+    SYNOR_ERROR_OUT_OF_MEMORY,
+    SYNOR_ERROR_NETWORK,
+    SYNOR_ERROR_HTTP,
+    SYNOR_ERROR_JSON_PARSE,
+    SYNOR_ERROR_TIMEOUT,
+    SYNOR_ERROR_AUTH,
+    SYNOR_ERROR_NOT_FOUND,
+    SYNOR_ERROR_UNKNOWN
+} synor_error_t;
+
+/* Network types */
+typedef enum {
+    SYNOR_NETWORK_MAINNET = 0,
+    SYNOR_NETWORK_TESTNET,
+    SYNOR_NETWORK_DEVNET
+} synor_network_t;
+
+/* Wallet types */
+typedef enum {
+    SYNOR_WALLET_STANDARD = 0,
+    SYNOR_WALLET_MULTISIG,
+    SYNOR_WALLET_HARDWARE,
+    SYNOR_WALLET_STEALTH
+} synor_wallet_type_t;
+
+/* Priority types */
+typedef enum {
+    SYNOR_PRIORITY_LOW = 0,
+    SYNOR_PRIORITY_MEDIUM,
+    SYNOR_PRIORITY_HIGH
+} synor_priority_t;
+
+/* Configuration */
+typedef struct {
+    const char* api_key;
+    const char* endpoint;       /* Default: "https://wallet.synor.io/v1" */
+    synor_network_t network;    /* Default: SYNOR_NETWORK_MAINNET */
+    uint32_t timeout_ms;        /* Default: 30000 */
+    uint32_t retries;           /* Default: 3 */
+    bool debug;                 /* Default: false */
+} synor_wallet_config_t;
+
+/* Opaque wallet client handle */
+typedef struct synor_wallet synor_wallet_t;
+
+/* Address structure */
+typedef struct {
+    char* address;
+    int32_t index;
+    bool is_change;
+} synor_address_t;
+
+/* Wallet structure */
+typedef struct {
+    char* id;
+    synor_wallet_type_t type;
+    synor_network_t network;
+    synor_address_t* addresses;
+    size_t address_count;
+    char* created_at;
+} synor_wallet_info_t;
+
+/* Stealth address */
+typedef struct {
+    char* spend_public_key;
+    char* view_public_key;
+    char* one_time_address;
+} synor_stealth_address_t;
+
+/* Create wallet result */
+typedef struct {
+    synor_wallet_info_t wallet;
+    char* mnemonic;  /* May be NULL for hardware wallets */
+} synor_create_wallet_result_t;
+
+/* Transaction input */
+typedef struct {
+    char* txid;
+    int32_t vout;
+    int64_t amount;
+} synor_tx_input_t;
+
+/* Transaction output */
+typedef struct {
+    char* address;
+    int64_t amount;
+} synor_tx_output_t;
+
+/* Transaction for signing */
+typedef struct {
+    synor_tx_input_t* inputs;
+    size_t input_count;
+    synor_tx_output_t* outputs;
+    size_t output_count;
+    int64_t fee;  /* 0 for auto-calculate */
+    synor_priority_t priority;
+} synor_transaction_t;
+
+/* Signed transaction */
+typedef struct {
+    char* txid;
+    char* hex;
+    int32_t size;
+    int64_t fee;
+} synor_signed_tx_t;
+
+/* Signature */
+typedef struct {
+    char* signature;
+    char* address;
+    int32_t recovery_id;  /* -1 if not applicable */
+} synor_signature_t;
+
+/* UTXO */
+typedef struct {
+    char* txid;
+    int32_t vout;
+    int64_t amount;
+    char* address;
+    int32_t confirmations;
+    char* script_pubkey;  /* May be NULL */
+} synor_utxo_t;
+
+/* Balance */
+typedef struct {
+    int64_t confirmed;
+    int64_t unconfirmed;
+    int64_t total;
+} synor_balance_t;
+
+/* UTXO list */
+typedef struct {
+    synor_utxo_t* utxos;
+    size_t count;
+} synor_utxo_list_t;
+
+/**
+ * Create a new wallet client.
+ *
+ * @param config Configuration options
+ * @return Wallet client handle, or NULL on failure
+ */
+synor_wallet_t* synor_wallet_create(const synor_wallet_config_t* config);
+
+/**
+ * Destroy wallet client and free resources.
+ *
+ * @param wallet Wallet client handle
+ */
+void synor_wallet_destroy(synor_wallet_t* wallet);
+
+/**
+ * Create a new wallet.
+ *
+ * @param wallet Wallet client handle
+ * @param type Type of wallet to create
+ * @param result Output parameter for result
+ * @return Error code
+ */
+synor_error_t synor_wallet_create_wallet(
+    synor_wallet_t* wallet,
+    synor_wallet_type_t type,
+    synor_create_wallet_result_t* result
+);
+
+/**
+ * Import a wallet from mnemonic.
+ *
+ * @param wallet Wallet client handle
+ * @param mnemonic 12 or 24 word mnemonic phrase
+ * @param passphrase Optional BIP39 passphrase (can be NULL)
+ * @param result Output parameter for wallet info
+ * @return Error code
+ */
+synor_error_t synor_wallet_import(
+    synor_wallet_t* wallet,
+    const char* mnemonic,
+    const char* passphrase,
+    synor_wallet_info_t* result
+);
+
+/**
+ * Get a wallet by ID.
+ *
+ * @param wallet Wallet client handle
+ * @param wallet_id Wallet ID
+ * @param result Output parameter for wallet info
+ * @return Error code
+ */
+synor_error_t synor_wallet_get(
+    synor_wallet_t* wallet,
+    const char* wallet_id,
+    synor_wallet_info_t* result
+);
+
+/**
+ * Generate a new address for a wallet.
+ *
+ * @param wallet Wallet client handle
+ * @param wallet_id Wallet ID
+ * @param is_change Whether this is a change address
+ * @param result Output parameter for address
+ * @return Error code
+ */
+synor_error_t synor_wallet_generate_address(
+    synor_wallet_t* wallet,
+    const char* wallet_id,
+    bool is_change,
+    synor_address_t* result
+);
+
+/**
+ * Get a stealth address for privacy transactions.
+ *
+ * @param wallet Wallet client handle
+ * @param wallet_id Wallet ID
+ * @param result Output parameter for stealth address
+ * @return Error code
+ */
+synor_error_t synor_wallet_get_stealth_address(
+    synor_wallet_t* wallet,
+    const char* wallet_id,
+    synor_stealth_address_t* result
+);
+
+/**
+ * Sign a transaction.
+ *
+ * @param wallet Wallet client handle
+ * @param wallet_id Wallet ID to sign with
+ * @param transaction Transaction to sign
+ * @param result Output parameter for signed transaction
+ * @return Error code
+ */
+synor_error_t synor_wallet_sign_transaction(
+    synor_wallet_t* wallet,
+    const char* wallet_id,
+    const synor_transaction_t* transaction,
+    synor_signed_tx_t* result
+);
+
+/**
+ * Sign a message.
+ *
+ * @param wallet Wallet client handle
+ * @param wallet_id Wallet ID
+ * @param message Message to sign
+ * @param address_index Address index to use for signing
+ * @param result Output parameter for signature
+ * @return Error code
+ */
+synor_error_t synor_wallet_sign_message(
+    synor_wallet_t* wallet,
+    const char* wallet_id,
+    const char* message,
+    int32_t address_index,
+    synor_signature_t* result
+);
+
+/**
+ * Verify a message signature.
+ *
+ * @param wallet Wallet client handle
+ * @param message Original message
+ * @param signature Signature to verify
+ * @param address Address that signed the message
+ * @param is_valid Output parameter for validity
+ * @return Error code
+ */
+synor_error_t synor_wallet_verify_message(
+    synor_wallet_t* wallet,
+    const char* message,
+    const char* signature,
+    const char* address,
+    bool* is_valid
+);
+
+/**
+ * Get balance for an address.
+ *
+ * @param wallet Wallet client handle
+ * @param address Address to query
+ * @param result Output parameter for balance
+ * @return Error code
+ */
+synor_error_t synor_wallet_get_balance(
+    synor_wallet_t* wallet,
+    const char* address,
+    synor_balance_t* result
+);
+
+/**
+ * Get UTXOs for an address.
+ *
+ * @param wallet Wallet client handle
+ * @param address Address to query
+ * @param min_confirmations Minimum confirmations required
+ * @param result Output parameter for UTXO list
+ * @return Error code
+ */
+synor_error_t synor_wallet_get_utxos(
+    synor_wallet_t* wallet,
+    const char* address,
+    int32_t min_confirmations,
+    synor_utxo_list_t* result
+);
+
+/**
+ * Estimate transaction fee.
+ *
+ * @param wallet Wallet client handle
+ * @param priority Transaction priority
+ * @param fee_per_byte Output parameter for fee per byte
+ * @return Error code
+ */
+synor_error_t synor_wallet_estimate_fee(
+    synor_wallet_t* wallet,
+    synor_priority_t priority,
+    int64_t* fee_per_byte
+);
+
+/* Free functions */
+void synor_address_free(synor_address_t* addr);
+void synor_wallet_info_free(synor_wallet_info_t* info);
+void synor_stealth_address_free(synor_stealth_address_t* addr);
+void synor_create_wallet_result_free(synor_create_wallet_result_t* result);
+void synor_signed_tx_free(synor_signed_tx_t* tx);
+void synor_signature_free(synor_signature_t* sig);
+void synor_utxo_free(synor_utxo_t* utxo);
+void synor_utxo_list_free(synor_utxo_list_t* list);
+
+/**
+ * Get error message for error code.
+ *
+ * @param error Error code
+ * @return Static string describing the error
+ */
+const char* synor_error_message(synor_error_t error);
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* SYNOR_WALLET_H */

sdk/c/src/common.c

@@ -0,0 +1,249 @@
+/**
+ * @file common.c
+ * @brief Common utilities for Synor C SDK
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <curl/curl.h>
+#include "synor/wallet.h"
+
+/* Error messages */
+static const char* error_messages[] = {
+    "OK",
+    "Invalid argument",
+    "Out of memory",
+    "Network error",
+    "HTTP error",
+    "JSON parse error",
+    "Timeout",
+    "Authentication error",
+    "Not found",
+    "Unknown error"
+};
+
+const char* synor_error_message(synor_error_t error) {
+    if (error >= 0 && error <= SYNOR_ERROR_UNKNOWN) {
+        return error_messages[error];
+    }
+    return "Unknown error code";
+}
+
+/* HTTP response buffer */
+typedef struct {
+    char* data;
+    size_t size;
+} http_response_t;
+
+/* CURL write callback */
+static size_t write_callback(void* contents, size_t size, size_t nmemb, void* userp) {
+    size_t real_size = size * nmemb;
+    http_response_t* resp = (http_response_t*)userp;
+
+    char* ptr = realloc(resp->data, resp->size + real_size + 1);
+    if (!ptr) {
+        return 0;
+    }
+
+    resp->data = ptr;
+    memcpy(&(resp->data[resp->size]), contents, real_size);
+    resp->size += real_size;
+    resp->data[resp->size] = 0;
+
+    return real_size;
+}
+
+/* Internal HTTP client structure */
+typedef struct {
+    CURL* curl;
+    char* api_key;
+    char* endpoint;
+    uint32_t timeout_ms;
+    uint32_t retries;
+    bool debug;
+} synor_http_client_t;
+
+synor_http_client_t* synor_http_client_create(
+    const char* api_key,
+    const char* endpoint,
+    uint32_t timeout_ms,
+    uint32_t retries,
+    bool debug
+) {
+    synor_http_client_t* client = calloc(1, sizeof(synor_http_client_t));
+    if (!client) return NULL;
+
+    client->curl = curl_easy_init();
+    if (!client->curl) {
+        free(client);
+        return NULL;
+    }
+
+    client->api_key = strdup(api_key);
+    client->endpoint = strdup(endpoint);
+    client->timeout_ms = timeout_ms;
+    client->retries = retries;
+    client->debug = debug;
+
+    return client;
+}
+
+void synor_http_client_destroy(synor_http_client_t* client) {
+    if (!client) return;
+
+    if (client->curl) {
+        curl_easy_cleanup(client->curl);
+    }
+    free(client->api_key);
+    free(client->endpoint);
+    free(client);
+}
+
+synor_error_t synor_http_get(
+    synor_http_client_t* client,
+    const char* path,
+    char** response,
+    size_t* response_size
+) {
+    if (!client || !path || !response) {
+        return SYNOR_ERROR_INVALID_ARGUMENT;
+    }
+
+    char url[2048];
+    snprintf(url, sizeof(url), "%s%s", client->endpoint, path);
+
+    http_response_t resp = {0};
+    struct curl_slist* headers = NULL;
+    char auth_header[512];
+    snprintf(auth_header, sizeof(auth_header), "Authorization: Bearer %s", client->api_key);
+
+    headers = curl_slist_append(headers, auth_header);
+    headers = curl_slist_append(headers, "Content-Type: application/json");
+
+    curl_easy_setopt(client->curl, CURLOPT_URL, url);
+    curl_easy_setopt(client->curl, CURLOPT_HTTPHEADER, headers);
+    curl_easy_setopt(client->curl, CURLOPT_WRITEFUNCTION, write_callback);
+    curl_easy_setopt(client->curl, CURLOPT_WRITEDATA, &resp);
+    curl_easy_setopt(client->curl, CURLOPT_TIMEOUT_MS, client->timeout_ms);
+
+    synor_error_t result = SYNOR_OK;
+
+    for (uint32_t attempt = 0; attempt < client->retries; attempt++) {
+        CURLcode res = curl_easy_perform(client->curl);
+
+        if (res == CURLE_OK) {
+            long http_code = 0;
+            curl_easy_getinfo(client->curl, CURLINFO_RESPONSE_CODE, &http_code);
+
+            if (http_code >= 200 && http_code < 300) {
+                *response = resp.data;
+                if (response_size) {
+                    *response_size = resp.size;
+                }
+                curl_slist_free_all(headers);
+                return SYNOR_OK;
+            } else if (http_code == 401) {
+                result = SYNOR_ERROR_AUTH;
+            } else if (http_code == 404) {
+                result = SYNOR_ERROR_NOT_FOUND;
+            } else {
+                result = SYNOR_ERROR_HTTP;
+            }
+        } else if (res == CURLE_OPERATION_TIMEDOUT) {
+            result = SYNOR_ERROR_TIMEOUT;
+        } else {
+            result = SYNOR_ERROR_NETWORK;
+        }
+
+        if (client->debug) {
+            fprintf(stderr, "HTTP attempt %u failed: %s\n",
+                    attempt + 1, curl_easy_strerror(res));
+        }
+
+        free(resp.data);
+        resp.data = NULL;
+        resp.size = 0;
+    }
+
+    curl_slist_free_all(headers);
+    return result;
+}
+
+synor_error_t synor_http_post(
+    synor_http_client_t* client,
+    const char* path,
+    const char* body,
+    char** response,
+    size_t* response_size
+) {
+    if (!client || !path || !body || !response) {
+        return SYNOR_ERROR_INVALID_ARGUMENT;
+    }
+
+    char url[2048];
+    snprintf(url, sizeof(url), "%s%s", client->endpoint, path);
+
+    http_response_t resp = {0};
+    struct curl_slist* headers = NULL;
+    char auth_header[512];
+    snprintf(auth_header, sizeof(auth_header), "Authorization: Bearer %s", client->api_key);
+
+    headers = curl_slist_append(headers, auth_header);
+    headers = curl_slist_append(headers, "Content-Type: application/json");
+
+    curl_easy_setopt(client->curl, CURLOPT_URL, url);
+    curl_easy_setopt(client->curl, CURLOPT_HTTPHEADER, headers);
+    curl_easy_setopt(client->curl, CURLOPT_POSTFIELDS, body);
+    curl_easy_setopt(client->curl, CURLOPT_WRITEFUNCTION, write_callback);
+    curl_easy_setopt(client->curl, CURLOPT_WRITEDATA, &resp);
+    curl_easy_setopt(client->curl, CURLOPT_TIMEOUT_MS, client->timeout_ms);
+
+    synor_error_t result = SYNOR_OK;
+
+    for (uint32_t attempt = 0; attempt < client->retries; attempt++) {
+        CURLcode res = curl_easy_perform(client->curl);
+
+        if (res == CURLE_OK) {
+            long http_code = 0;
+            curl_easy_getinfo(client->curl, CURLINFO_RESPONSE_CODE, &http_code);
+
+            if (http_code >= 200 && http_code < 300) {
+                *response = resp.data;
+                if (response_size) {
+                    *response_size = resp.size;
+                }
+                curl_slist_free_all(headers);
+                return SYNOR_OK;
+            } else if (http_code == 401) {
+                result = SYNOR_ERROR_AUTH;
+            } else if (http_code == 404) {
+                result = SYNOR_ERROR_NOT_FOUND;
+            } else {
+                result = SYNOR_ERROR_HTTP;
+            }
+        } else if (res == CURLE_OPERATION_TIMEDOUT) {
+            result = SYNOR_ERROR_TIMEOUT;
+        } else {
+            result = SYNOR_ERROR_NETWORK;
+        }
+
+        if (client->debug) {
+            fprintf(stderr, "HTTP attempt %u failed: %s\n",
+                    attempt + 1, curl_easy_strerror(res));
+        }
+
+        free(resp.data);
+        resp.data = NULL;
+        resp.size = 0;
+    }
+
+    curl_slist_free_all(headers);
+    return result;
+}
+
+/* String duplication helper */
+char* synor_strdup(const char* s) {
+    if (!s) return NULL;
+    return strdup(s);
+}

sdk/c/src/rpc/rpc.c

@@ -0,0 +1,221 @@
+/**
+ * @file rpc.c
+ * @brief Synor RPC SDK implementation
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include "synor/rpc.h"
+
+/* Forward declarations from common.c */
+typedef struct synor_http_client synor_http_client_t;
+synor_http_client_t* synor_http_client_create(
+    const char* api_key, const char* endpoint,
+    uint32_t timeout_ms, uint32_t retries, bool debug);
+void synor_http_client_destroy(synor_http_client_t* client);
+synor_error_t synor_http_get(synor_http_client_t* client, const char* path,
+    char** response, size_t* response_size);
+synor_error_t synor_http_post(synor_http_client_t* client, const char* path,
+    const char* body, char** response, size_t* response_size);
+char* synor_strdup(const char* s);
+
+/* Internal RPC structure */
+struct synor_rpc {
+    synor_http_client_t* http;
+    synor_network_t network;
+    char* ws_endpoint;
+    /* WebSocket connection would go here */
+};
+
+/* Internal subscription structure */
+struct synor_subscription {
+    char* id;
+    char* channel;
+    void* callback;
+    void* user_data;
+    struct synor_rpc* rpc;
+};
+
+synor_rpc_t* synor_rpc_create(const synor_rpc_config_t* config) {
+    if (!config || !config->api_key) {
+        return NULL;
+    }
+
+    synor_rpc_t* rpc = calloc(1, sizeof(synor_rpc_t));
+    if (!rpc) return NULL;
+
+    const char* endpoint = config->endpoint ?
+        config->endpoint : "https://rpc.synor.io/v1";
+    const char* ws_endpoint = config->ws_endpoint ?
+        config->ws_endpoint : "wss://rpc.synor.io/v1/ws";
+    uint32_t timeout = config->timeout_ms > 0 ? config->timeout_ms : 30000;
+    uint32_t retries = config->retries > 0 ? config->retries : 3;
+
+    rpc->http = synor_http_client_create(
+        config->api_key, endpoint, timeout, retries, config->debug);
+
+    if (!rpc->http) {
+        free(rpc);
+        return NULL;
+    }
+
+    rpc->network = config->network;
+    rpc->ws_endpoint = synor_strdup(ws_endpoint);
+
+    return rpc;
+}
+
+void synor_rpc_destroy(synor_rpc_t* rpc) {
+    if (!rpc) return;
+    synor_http_client_destroy(rpc->http);
+    free(rpc->ws_endpoint);
+    free(rpc);
+}
+
+/* Stub implementations - TODO: Implement with JSON parsing */
+
+synor_error_t synor_rpc_get_latest_block(synor_rpc_t* rpc, synor_block_t* result) {
+    (void)rpc; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_get_block(synor_rpc_t* rpc, const char* hash_or_height,
+    synor_block_t* result) {
+    (void)rpc; (void)hash_or_height; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_get_block_header(synor_rpc_t* rpc, const char* hash_or_height,
+    synor_block_header_t* result) {
+    (void)rpc; (void)hash_or_height; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_get_transaction(synor_rpc_t* rpc, const char* txid,
+    synor_rpc_transaction_t* result) {
+    (void)rpc; (void)txid; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_get_raw_transaction(synor_rpc_t* rpc, const char* txid,
+    char** hex) {
+    (void)rpc; (void)txid; (void)hex;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_send_raw_transaction(synor_rpc_t* rpc, const char* hex,
+    synor_submit_result_t* result) {
+    (void)rpc; (void)hex; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_decode_raw_transaction(synor_rpc_t* rpc, const char* hex,
+    synor_rpc_transaction_t* result) {
+    (void)rpc; (void)hex; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_estimate_fee(synor_rpc_t* rpc, synor_priority_t priority,
+    synor_fee_estimate_t* result) {
+    (void)rpc; (void)priority; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_get_chain_info(synor_rpc_t* rpc, synor_chain_info_t* result) {
+    (void)rpc; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_rpc_get_mempool_info(synor_rpc_t* rpc, synor_mempool_info_t* result) {
+    (void)rpc; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_subscription_t* synor_rpc_subscribe_blocks(synor_rpc_t* rpc,
+    synor_block_callback_t callback, void* user_data) {
+    (void)rpc; (void)callback; (void)user_data;
+    return NULL; /* TODO: Implement WebSocket */
+}
+
+synor_subscription_t* synor_rpc_subscribe_address(synor_rpc_t* rpc,
+    const char* address, synor_tx_callback_t callback, void* user_data) {
+    (void)rpc; (void)address; (void)callback; (void)user_data;
+    return NULL;
+}
+
+synor_subscription_t* synor_rpc_subscribe_mempool(synor_rpc_t* rpc,
+    synor_tx_callback_t callback, void* user_data) {
+    (void)rpc; (void)callback; (void)user_data;
+    return NULL;
+}
+
+void synor_subscription_cancel(synor_subscription_t* sub) {
+    if (!sub) return;
+    free(sub->id);
+    free(sub->channel);
+    free(sub);
+}
+
+/* Free functions */
+void synor_block_header_free(synor_block_header_t* header) {
+    if (!header) return;
+    free(header->hash);
+    free(header->previous_hash);
+    free(header->merkle_root);
+    memset(header, 0, sizeof(*header));
+}
+
+void synor_block_free(synor_block_t* block) {
+    if (!block) return;
+    free(block->hash);
+    free(block->previous_hash);
+    free(block->merkle_root);
+    for (size_t i = 0; i < block->transaction_count; i++) {
+        synor_rpc_transaction_free(&block->transactions[i]);
+    }
+    free(block->transactions);
+    memset(block, 0, sizeof(*block));
+}
+
+void synor_rpc_transaction_free(synor_rpc_transaction_t* tx) {
+    if (!tx) return;
+    free(tx->txid);
+    free(tx->hash);
+    free(tx->block_hash);
+    for (size_t i = 0; i < tx->input_count; i++) {
+        free(tx->inputs[i].txid);
+        free(tx->inputs[i].script_sig);
+        for (size_t j = 0; j < tx->inputs[i].witness_count; j++) {
+            free(tx->inputs[i].witness[j]);
+        }
+        free(tx->inputs[i].witness);
+    }
+    free(tx->inputs);
+    for (size_t i = 0; i < tx->output_count; i++) {
+        free(tx->outputs[i].script_pubkey.asm_str);
+        free(tx->outputs[i].script_pubkey.hex);
+        free(tx->outputs[i].script_pubkey.type);
+        free(tx->outputs[i].script_pubkey.address);
+    }
+    free(tx->outputs);
+    memset(tx, 0, sizeof(*tx));
+}
+
+void synor_chain_info_free(synor_chain_info_t* info) {
+    if (!info) return;
+    free(info->chain);
+    free(info->best_block_hash);
+    free(info->chain_work);
+    memset(info, 0, sizeof(*info));
+}
+
+void synor_mempool_info_free(synor_mempool_info_t* info) {
+    (void)info; /* No dynamic members */
+}
+
+void synor_submit_result_free(synor_submit_result_t* result) {
+    if (!result) return;
+    free(result->txid);
+    free(result->reason);
+    memset(result, 0, sizeof(*result));
+}

sdk/c/src/storage/storage.c

@@ -0,0 +1,234 @@
+/**
+ * @file storage.c
+ * @brief Synor Storage SDK implementation
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "synor/storage.h"
+
+/* Forward declarations from common.c */
+typedef struct synor_http_client synor_http_client_t;
+synor_http_client_t* synor_http_client_create(
+    const char* api_key, const char* endpoint,
+    uint32_t timeout_ms, uint32_t retries, bool debug);
+void synor_http_client_destroy(synor_http_client_t* client);
+synor_error_t synor_http_get(synor_http_client_t* client, const char* path,
+    char** response, size_t* response_size);
+synor_error_t synor_http_post(synor_http_client_t* client, const char* path,
+    const char* body, char** response, size_t* response_size);
+char* synor_strdup(const char* s);
+
+/* Internal storage structure */
+struct synor_storage {
+    synor_http_client_t* http;
+    char* gateway;
+};
+
+synor_storage_t* synor_storage_create(const synor_storage_config_t* config) {
+    if (!config || !config->api_key) {
+        return NULL;
+    }
+
+    synor_storage_t* storage = calloc(1, sizeof(synor_storage_t));
+    if (!storage) return NULL;
+
+    const char* endpoint = config->endpoint ?
+        config->endpoint : "https://storage.synor.io/v1";
+    const char* gateway = config->gateway ?
+        config->gateway : "https://gateway.synor.io";
+    uint32_t timeout = config->timeout_ms > 0 ? config->timeout_ms : 60000;
+    uint32_t retries = config->retries > 0 ? config->retries : 3;
+
+    storage->http = synor_http_client_create(
+        config->api_key, endpoint, timeout, retries, config->debug);
+
+    if (!storage->http) {
+        free(storage);
+        return NULL;
+    }
+
+    storage->gateway = synor_strdup(gateway);
+
+    return storage;
+}
+
+void synor_storage_destroy(synor_storage_t* storage) {
+    if (!storage) return;
+    synor_http_client_destroy(storage->http);
+    free(storage->gateway);
+    free(storage);
+}
+
+char* synor_storage_get_gateway_url(synor_storage_t* storage,
+    const char* cid, const char* path) {
+    if (!storage || !cid) return NULL;
+
+    size_t len = strlen(storage->gateway) + strlen("/ipfs/") + strlen(cid);
+    if (path) {
+        len += 1 + strlen(path);
+    }
+    len += 1; /* null terminator */
+
+    char* url = malloc(len);
+    if (!url) return NULL;
+
+    if (path) {
+        snprintf(url, len, "%s/ipfs/%s/%s", storage->gateway, cid, path);
+    } else {
+        snprintf(url, len, "%s/ipfs/%s", storage->gateway, cid);
+    }
+
+    return url;
+}
+
+/* Stub implementations - TODO: Implement with multipart upload */
+
+synor_error_t synor_storage_upload(synor_storage_t* storage,
+    const uint8_t* data, size_t size,
+    const synor_upload_options_t* options, synor_upload_response_t* result) {
+    (void)storage; (void)data; (void)size; (void)options; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_upload_directory(synor_storage_t* storage,
+    const synor_file_entry_t* files, size_t file_count,
+    const char* dir_name, synor_upload_response_t* result) {
+    (void)storage; (void)files; (void)file_count; (void)dir_name; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_download(synor_storage_t* storage,
+    const char* cid, uint8_t** data, size_t* size) {
+    (void)storage; (void)cid; (void)data; (void)size;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_download_stream(synor_storage_t* storage,
+    const char* cid, synor_download_callback_t callback, void* user_data) {
+    (void)storage; (void)cid; (void)callback; (void)user_data;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_pin(synor_storage_t* storage,
+    const synor_pin_request_t* request, synor_pin_t* result) {
+    (void)storage; (void)request; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_unpin(synor_storage_t* storage, const char* cid) {
+    (void)storage; (void)cid;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_get_pin_status(synor_storage_t* storage,
+    const char* cid, synor_pin_t* result) {
+    (void)storage; (void)cid; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_list_pins(synor_storage_t* storage,
+    synor_pin_status_t* status, int32_t limit, int32_t offset,
+    synor_pin_list_t* result) {
+    (void)storage; (void)status; (void)limit; (void)offset; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_create_car(synor_storage_t* storage,
+    const synor_file_entry_t* entries, size_t entry_count,
+    synor_car_file_t* result) {
+    (void)storage; (void)entries; (void)entry_count; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_import_car(synor_storage_t* storage,
+    const uint8_t* car_data, size_t car_size, synor_cid_list_t* result) {
+    (void)storage; (void)car_data; (void)car_size; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_export_car(synor_storage_t* storage,
+    const char* cid, uint8_t** data, size_t* size) {
+    (void)storage; (void)cid; (void)data; (void)size;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_list_directory(synor_storage_t* storage,
+    const char* cid, synor_directory_listing_t* result) {
+    (void)storage; (void)cid; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_storage_get_stats(synor_storage_t* storage,
+    synor_storage_stats_t* result) {
+    (void)storage; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+/* Free functions */
+void synor_upload_response_free(synor_upload_response_t* response) {
+    if (!response) return;
+    free(response->cid);
+    free(response->name);
+    free(response->created_at);
+    memset(response, 0, sizeof(*response));
+}
+
+void synor_pin_free(synor_pin_t* pin) {
+    if (!pin) return;
+    free(pin->cid);
+    free(pin->name);
+    free(pin->created_at);
+    free(pin->expires_at);
+    for (size_t i = 0; i < pin->delegate_count; i++) {
+        free(pin->delegates[i]);
+    }
+    free(pin->delegates);
+    memset(pin, 0, sizeof(*pin));
+}
+
+void synor_pin_list_free(synor_pin_list_t* list) {
+    if (!list) return;
+    for (size_t i = 0; i < list->count; i++) {
+        synor_pin_free(&list->pins[i]);
+    }
+    free(list->pins);
+    memset(list, 0, sizeof(*list));
+}
+
+void synor_car_file_free(synor_car_file_t* car) {
+    if (!car) return;
+    free(car->cid);
+    for (size_t i = 0; i < car->root_count; i++) {
+        free(car->roots[i]);
+    }
+    free(car->roots);
+    free(car->created_at);
+    memset(car, 0, sizeof(*car));
+}
+
+void synor_cid_list_free(synor_cid_list_t* list) {
+    if (!list) return;
+    for (size_t i = 0; i < list->count; i++) {
+        free(list->cids[i]);
+    }
+    free(list->cids);
+    memset(list, 0, sizeof(*list));
+}
+
+void synor_directory_entry_free(synor_directory_entry_t* entry) {
+    if (!entry) return;
+    free(entry->name);
+    free(entry->cid);
+    memset(entry, 0, sizeof(*entry));
+}
+
+void synor_directory_listing_free(synor_directory_listing_t* listing) {
+    if (!listing) return;
+    for (size_t i = 0; i < listing->count; i++) {
+        synor_directory_entry_free(&listing->entries[i]);
+    }
+    free(listing->entries);
+    memset(listing, 0, sizeof(*listing));
+}

sdk/c/src/wallet/wallet.c

@@ -0,0 +1,355 @@
+/**
+ * @file wallet.c
+ * @brief Synor Wallet SDK implementation
+ */
+
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include "synor/wallet.h"
+
+#ifdef HAVE_JANSSON
+#include <jansson.h>
+#endif
+
+/* Forward declarations from common.c */
+typedef struct synor_http_client synor_http_client_t;
+synor_http_client_t* synor_http_client_create(
+    const char* api_key, const char* endpoint,
+    uint32_t timeout_ms, uint32_t retries, bool debug);
+void synor_http_client_destroy(synor_http_client_t* client);
+synor_error_t synor_http_get(synor_http_client_t* client, const char* path,
+    char** response, size_t* response_size);
+synor_error_t synor_http_post(synor_http_client_t* client, const char* path,
+    const char* body, char** response, size_t* response_size);
+char* synor_strdup(const char* s);
+
+/* Internal wallet structure */
+struct synor_wallet {
+    synor_http_client_t* http;
+    synor_network_t network;
+};
+
+synor_wallet_t* synor_wallet_create(const synor_wallet_config_t* config) {
+    if (!config || !config->api_key) {
+        return NULL;
+    }
+
+    synor_wallet_t* wallet = calloc(1, sizeof(synor_wallet_t));
+    if (!wallet) return NULL;
+
+    const char* endpoint = config->endpoint ?
+        config->endpoint : "https://wallet.synor.io/v1";
+    uint32_t timeout = config->timeout_ms > 0 ? config->timeout_ms : 30000;
+    uint32_t retries = config->retries > 0 ? config->retries : 3;
+
+    wallet->http = synor_http_client_create(
+        config->api_key, endpoint, timeout, retries, config->debug);
+
+    if (!wallet->http) {
+        free(wallet);
+        return NULL;
+    }
+
+    wallet->network = config->network;
+    return wallet;
+}
+
+void synor_wallet_destroy(synor_wallet_t* wallet) {
+    if (!wallet) return;
+    synor_http_client_destroy(wallet->http);
+    free(wallet);
+}
+
+#ifdef HAVE_JANSSON
+
+static synor_error_t parse_wallet_info(json_t* json, synor_wallet_info_t* info) {
+    if (!json || !info) return SYNOR_ERROR_INVALID_ARGUMENT;
+
+    memset(info, 0, sizeof(*info));
+
+    json_t* id = json_object_get(json, "id");
+    if (id) info->id = synor_strdup(json_string_value(id));
+
+    json_t* type = json_object_get(json, "type");
+    if (type) {
+        const char* type_str = json_string_value(type);
+        if (strcmp(type_str, "standard") == 0) info->type = SYNOR_WALLET_STANDARD;
+        else if (strcmp(type_str, "multisig") == 0) info->type = SYNOR_WALLET_MULTISIG;
+        else if (strcmp(type_str, "hardware") == 0) info->type = SYNOR_WALLET_HARDWARE;
+        else if (strcmp(type_str, "stealth") == 0) info->type = SYNOR_WALLET_STEALTH;
+    }
+
+    json_t* network = json_object_get(json, "network");
+    if (network) {
+        const char* net_str = json_string_value(network);
+        if (strcmp(net_str, "mainnet") == 0) info->network = SYNOR_NETWORK_MAINNET;
+        else if (strcmp(net_str, "testnet") == 0) info->network = SYNOR_NETWORK_TESTNET;
+        else if (strcmp(net_str, "devnet") == 0) info->network = SYNOR_NETWORK_DEVNET;
+    }
+
+    json_t* created_at = json_object_get(json, "created_at");
+    if (created_at) info->created_at = synor_strdup(json_string_value(created_at));
+
+    json_t* addresses = json_object_get(json, "addresses");
+    if (addresses && json_is_array(addresses)) {
+        size_t count = json_array_size(addresses);
+        info->addresses = calloc(count, sizeof(synor_address_t));
+        info->address_count = count;
+
+        for (size_t i = 0; i < count; i++) {
+            json_t* addr = json_array_get(addresses, i);
+            info->addresses[i].address = synor_strdup(
+                json_string_value(json_object_get(addr, "address")));
+            info->addresses[i].index = (int32_t)json_integer_value(
+                json_object_get(addr, "index"));
+            info->addresses[i].is_change = json_boolean_value(
+                json_object_get(addr, "is_change"));
+        }
+    }
+
+    return SYNOR_OK;
+}
+
+synor_error_t synor_wallet_create_wallet(
+    synor_wallet_t* wallet,
+    synor_wallet_type_t type,
+    synor_create_wallet_result_t* result
+) {
+    if (!wallet || !result) return SYNOR_ERROR_INVALID_ARGUMENT;
+
+    const char* type_str;
+    switch (type) {
+        case SYNOR_WALLET_STANDARD: type_str = "standard"; break;
+        case SYNOR_WALLET_MULTISIG: type_str = "multisig"; break;
+        case SYNOR_WALLET_HARDWARE: type_str = "hardware"; break;
+        case SYNOR_WALLET_STEALTH: type_str = "stealth"; break;
+        default: return SYNOR_ERROR_INVALID_ARGUMENT;
+    }
+
+    const char* net_str;
+    switch (wallet->network) {
+        case SYNOR_NETWORK_MAINNET: net_str = "mainnet"; break;
+        case SYNOR_NETWORK_TESTNET: net_str = "testnet"; break;
+        case SYNOR_NETWORK_DEVNET: net_str = "devnet"; break;
+        default: net_str = "mainnet"; break;
+    }
+
+    char body[256];
+    snprintf(body, sizeof(body),
+        "{\"type\":\"%s\",\"network\":\"%s\"}", type_str, net_str);
+
+    char* response = NULL;
+    synor_error_t err = synor_http_post(wallet->http, "/wallets", body,
+        &response, NULL);
+
+    if (err != SYNOR_OK) return err;
+
+    json_error_t json_err;
+    json_t* json = json_loads(response, 0, &json_err);
+    free(response);
+
+    if (!json) return SYNOR_ERROR_JSON_PARSE;
+
+    memset(result, 0, sizeof(*result));
+
+    json_t* wallet_json = json_object_get(json, "wallet");
+    if (wallet_json) {
+        parse_wallet_info(wallet_json, &result->wallet);
+    }
+
+    json_t* mnemonic = json_object_get(json, "mnemonic");
+    if (mnemonic) {
+        result->mnemonic = synor_strdup(json_string_value(mnemonic));
+    }
+
+    json_decref(json);
+    return SYNOR_OK;
+}
+
+synor_error_t synor_wallet_get_balance(
+    synor_wallet_t* wallet,
+    const char* address,
+    synor_balance_t* result
+) {
+    if (!wallet || !address || !result) return SYNOR_ERROR_INVALID_ARGUMENT;
+
+    char path[512];
+    snprintf(path, sizeof(path), "/addresses/%s/balance", address);
+
+    char* response = NULL;
+    synor_error_t err = synor_http_get(wallet->http, path, &response, NULL);
+
+    if (err != SYNOR_OK) return err;
+
+    json_error_t json_err;
+    json_t* json = json_loads(response, 0, &json_err);
+    free(response);
+
+    if (!json) return SYNOR_ERROR_JSON_PARSE;
+
+    result->confirmed = json_integer_value(json_object_get(json, "confirmed"));
+    result->unconfirmed = json_integer_value(json_object_get(json, "unconfirmed"));
+    result->total = json_integer_value(json_object_get(json, "total"));
+
+    json_decref(json);
+    return SYNOR_OK;
+}
+
+#else /* No JANSSON */
+
+synor_error_t synor_wallet_create_wallet(
+    synor_wallet_t* wallet,
+    synor_wallet_type_t type,
+    synor_create_wallet_result_t* result
+) {
+    (void)wallet; (void)type; (void)result;
+    return SYNOR_ERROR_UNKNOWN; /* JSON parsing not available */
+}
+
+synor_error_t synor_wallet_get_balance(
+    synor_wallet_t* wallet,
+    const char* address,
+    synor_balance_t* result
+) {
+    (void)wallet; (void)address; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+#endif /* HAVE_JANSSON */
+
+/* Stub implementations for remaining functions */
+synor_error_t synor_wallet_import(
+    synor_wallet_t* wallet, const char* mnemonic,
+    const char* passphrase, synor_wallet_info_t* result
+) {
+    (void)wallet; (void)mnemonic; (void)passphrase; (void)result;
+    return SYNOR_ERROR_UNKNOWN; /* TODO: Implement */
+}
+
+synor_error_t synor_wallet_get(
+    synor_wallet_t* wallet, const char* wallet_id,
+    synor_wallet_info_t* result
+) {
+    (void)wallet; (void)wallet_id; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_wallet_generate_address(
+    synor_wallet_t* wallet, const char* wallet_id,
+    bool is_change, synor_address_t* result
+) {
+    (void)wallet; (void)wallet_id; (void)is_change; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_wallet_get_stealth_address(
+    synor_wallet_t* wallet, const char* wallet_id,
+    synor_stealth_address_t* result
+) {
+    (void)wallet; (void)wallet_id; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_wallet_sign_transaction(
+    synor_wallet_t* wallet, const char* wallet_id,
+    const synor_transaction_t* transaction, synor_signed_tx_t* result
+) {
+    (void)wallet; (void)wallet_id; (void)transaction; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_wallet_sign_message(
+    synor_wallet_t* wallet, const char* wallet_id,
+    const char* message, int32_t address_index, synor_signature_t* result
+) {
+    (void)wallet; (void)wallet_id; (void)message; (void)address_index; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_wallet_verify_message(
+    synor_wallet_t* wallet, const char* message,
+    const char* signature, const char* address, bool* is_valid
+) {
+    (void)wallet; (void)message; (void)signature; (void)address; (void)is_valid;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_wallet_get_utxos(
+    synor_wallet_t* wallet, const char* address,
+    int32_t min_confirmations, synor_utxo_list_t* result
+) {
+    (void)wallet; (void)address; (void)min_confirmations; (void)result;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+synor_error_t synor_wallet_estimate_fee(
+    synor_wallet_t* wallet, synor_priority_t priority, int64_t* fee_per_byte
+) {
+    (void)wallet; (void)priority; (void)fee_per_byte;
+    return SYNOR_ERROR_UNKNOWN;
+}
+
+/* Free functions */
+void synor_address_free(synor_address_t* addr) {
+    if (!addr) return;
+    free(addr->address);
+    memset(addr, 0, sizeof(*addr));
+}
+
+void synor_wallet_info_free(synor_wallet_info_t* info) {
+    if (!info) return;
+    free(info->id);
+    free(info->created_at);
+    for (size_t i = 0; i < info->address_count; i++) {
+        synor_address_free(&info->addresses[i]);
+    }
+    free(info->addresses);
+    memset(info, 0, sizeof(*info));
+}
+
+void synor_stealth_address_free(synor_stealth_address_t* addr) {
+    if (!addr) return;
+    free(addr->spend_public_key);
+    free(addr->view_public_key);
+    free(addr->one_time_address);
+    memset(addr, 0, sizeof(*addr));
+}
+
+void synor_create_wallet_result_free(synor_create_wallet_result_t* result) {
+    if (!result) return;
+    synor_wallet_info_free(&result->wallet);
+    free(result->mnemonic);
+    memset(result, 0, sizeof(*result));
+}
+
+void synor_signed_tx_free(synor_signed_tx_t* tx) {
+    if (!tx) return;
+    free(tx->txid);
+    free(tx->hex);
+    memset(tx, 0, sizeof(*tx));
+}
+
+void synor_signature_free(synor_signature_t* sig) {
+    if (!sig) return;
+    free(sig->signature);
+    free(sig->address);
+    memset(sig, 0, sizeof(*sig));
+}
+
+void synor_utxo_free(synor_utxo_t* utxo) {
+    if (!utxo) return;
+    free(utxo->txid);
+    free(utxo->address);
+    free(utxo->script_pubkey);
+    memset(utxo, 0, sizeof(*utxo));
+}
+
+void synor_utxo_list_free(synor_utxo_list_t* list) {
+    if (!list) return;
+    for (size_t i = 0; i < list->count; i++) {
+        synor_utxo_free(&list->utxos[i]);
+    }
+    free(list->utxos);
+    memset(list, 0, sizeof(*list));
+}

sdk/cpp/CMakeLists.txt

@@ -1,5 +1,5 @@
 cmake_minimum_required(VERSION 3.16)
-project(synor_compute VERSION 0.1.0 LANGUAGES CXX)
+project(synor_sdk VERSION 0.1.0 LANGUAGES CXX)
 
 set(CMAKE_CXX_STANDARD 20)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
@@ -28,25 +28,31 @@ set(SYNOR_SOURCES
     src/synor_compute.cpp
     src/tensor.cpp
     src/client.cpp
+    src/wallet/wallet.cpp
+    src/rpc/rpc.cpp
+    src/storage/storage.cpp
 )
 
 # Create library
-add_library(synor_compute ${SYNOR_SOURCES})
+add_library(synor_sdk ${SYNOR_SOURCES})
 
-target_include_directories(synor_compute
+# Alias for backwards compatibility
+add_library(synor_compute ALIAS synor_sdk)
+
+target_include_directories(synor_sdk
     PUBLIC
         $<BUILD_INTERFACE:${CMAKE_CURRENT_SOURCE_DIR}/include>
         $<INSTALL_INTERFACE:include>
 )
 
-target_link_libraries(synor_compute
+target_link_libraries(synor_sdk
     PRIVATE
         CURL::libcurl
         nlohmann_json::nlohmann_json
 )
 
 # Set library properties
-set_target_properties(synor_compute PROPERTIES
+set_target_properties(synor_sdk PROPERTIES
     VERSION ${PROJECT_VERSION}
     SOVERSION ${PROJECT_VERSION_MAJOR}
 )
@@ -54,8 +60,8 @@ set_target_properties(synor_compute PROPERTIES
 # Installation
 include(GNUInstallDirs)
 
-install(TARGETS synor_compute
-    EXPORT synor_compute-targets
+install(TARGETS synor_sdk
+    EXPORT synor_sdk-targets
     LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
     ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
     RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
@@ -65,8 +71,8 @@ install(DIRECTORY include/
     DESTINATION ${CMAKE_INSTALL_INCLUDEDIR}
 )
 
-install(EXPORT synor_compute-targets
-    FILE synor_compute-targets.cmake
+install(EXPORT synor_sdk-targets
+    FILE synor_sdk-targets.cmake
     NAMESPACE synor::
-    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/synor_compute
+    DESTINATION ${CMAKE_INSTALL_LIBDIR}/cmake/synor_sdk
 )

sdk/cpp/include/synor/rpc.hpp

@@ -0,0 +1,219 @@
+/**
+ * @file rpc.hpp
+ * @brief Synor RPC SDK for C++
+ *
+ * Modern C++17 SDK for blockchain queries and real-time subscriptions.
+ */
+
+#pragma once
+
+#include <string>
+#include <vector>
+#include <optional>
+#include <future>
+#include <memory>
+#include <functional>
+#include <cstdint>
+#include "wallet.hpp"  // For Network, Priority, SynorException
+
+namespace synor {
+namespace rpc {
+
+/// Transaction status
+enum class TransactionStatus {
+    Pending,
+    Confirmed,
+    Failed
+};
+
+/// RPC configuration
+struct Config {
+    std::string api_key;
+    std::string endpoint = "https://rpc.synor.io/v1";
+    std::string ws_endpoint = "wss://rpc.synor.io/v1/ws";
+    Network network = Network::Mainnet;
+    uint32_t timeout_ms = 30000;
+    uint32_t retries = 3;
+    bool debug = false;
+};
+
+/// Block header
+struct BlockHeader {
+    std::string hash;
+    int64_t height;
+    std::string previous_hash;
+    int64_t timestamp;
+    int32_t version;
+    std::string merkle_root;
+    int64_t nonce;
+    double difficulty;
+};
+
+/// Script public key
+struct ScriptPubKey {
+    std::string asm_code;
+    std::string hex;
+    std::string type;
+    std::optional<std::string> address;
+};
+
+/// Transaction input
+struct TransactionInput {
+    std::string txid;
+    int32_t vout;
+    std::optional<std::string> script_sig;
+    int64_t sequence;
+    std::vector<std::string> witness;
+};
+
+/// Transaction output
+struct TransactionOutput {
+    int64_t value;
+    int32_t n;
+    ScriptPubKey script_pubkey;
+};
+
+/// Transaction
+struct Transaction {
+    std::string txid;
+    std::string hash;
+    int32_t version;
+    int32_t size;
+    int32_t weight;
+    int64_t lock_time;
+    std::vector<TransactionInput> inputs;
+    std::vector<TransactionOutput> outputs;
+    int64_t fee;
+    int32_t confirmations;
+    std::optional<std::string> block_hash;
+    std::optional<int64_t> block_height;
+    std::optional<int64_t> timestamp;
+    TransactionStatus status = TransactionStatus::Pending;
+};
+
+/// Block
+struct Block {
+    std::string hash;
+    int64_t height;
+    std::string previous_hash;
+    int64_t timestamp;
+    int32_t version;
+    std::string merkle_root;
+    int64_t nonce;
+    double difficulty;
+    std::vector<Transaction> transactions;
+    int32_t size;
+    int32_t weight;
+};
+
+/// Chain information
+struct ChainInfo {
+    std::string chain;
+    int64_t blocks;
+    int64_t headers;
+    std::string best_block_hash;
+    double difficulty;
+    int64_t median_time;
+    double verification_progress;
+    std::string chain_work;
+    bool pruned;
+};
+
+/// Mempool information
+struct MempoolInfo {
+    int32_t size;
+    int64_t bytes;
+    int64_t usage;
+    int64_t max_mempool;
+    double mempool_min_fee;
+    double min_relay_tx_fee;
+};
+
+/// Fee estimate
+struct FeeEstimate {
+    Priority priority;
+    int64_t fee_rate;
+    int32_t estimated_blocks;
+};
+
+/// Transaction submission result
+struct SubmitResult {
+    std::string txid;
+    bool accepted;
+    std::optional<std::string> reason;
+};
+
+/// Subscription handle
+class Subscription {
+public:
+    Subscription(const std::string& id, const std::string& channel,
+                 std::function<void()> on_cancel);
+    ~Subscription();
+
+    Subscription(const Subscription&) = delete;
+    Subscription& operator=(const Subscription&) = delete;
+    Subscription(Subscription&&) noexcept;
+    Subscription& operator=(Subscription&&) noexcept;
+
+    const std::string& id() const { return id_; }
+    const std::string& channel() const { return channel_; }
+
+    void cancel();
+
+private:
+    std::string id_;
+    std::string channel_;
+    std::function<void()> on_cancel_;
+};
+
+/// RPC client
+class Client {
+public:
+    explicit Client(const Config& config);
+    ~Client();
+
+    Client(const Client&) = delete;
+    Client& operator=(const Client&) = delete;
+    Client(Client&&) noexcept;
+    Client& operator=(Client&&) noexcept;
+
+    // Block operations
+    Block get_latest_block();
+    std::future<Block> get_latest_block_async();
+    Block get_block(const std::string& hash_or_height);
+    BlockHeader get_block_header(const std::string& hash_or_height);
+    std::vector<Block> get_blocks(int64_t start_height, int64_t end_height);
+
+    // Transaction operations
+    Transaction get_transaction(const std::string& txid);
+    std::string get_raw_transaction(const std::string& txid);
+    SubmitResult send_raw_transaction(const std::string& hex);
+    Transaction decode_raw_transaction(const std::string& hex);
+    std::vector<Transaction> get_address_transactions(
+        const std::string& address, int32_t limit = 50, int32_t offset = 0);
+
+    // Fee estimation
+    FeeEstimate estimate_fee(Priority priority = Priority::Medium);
+    std::map<Priority, FeeEstimate> get_all_fee_estimates();
+
+    // Chain information
+    ChainInfo get_chain_info();
+    MempoolInfo get_mempool_info();
+    std::vector<std::string> get_mempool_transactions(int32_t limit = 100);
+
+    // Subscriptions
+    std::unique_ptr<Subscription> subscribe_blocks(
+        std::function<void(const Block&)> callback);
+    std::unique_ptr<Subscription> subscribe_address(
+        const std::string& address,
+        std::function<void(const Transaction&)> callback);
+    std::unique_ptr<Subscription> subscribe_mempool(
+        std::function<void(const Transaction&)> callback);
+
+private:
+    class Impl;
+    std::unique_ptr<Impl> impl_;
+};
+
+} // namespace rpc
+} // namespace synor

sdk/cpp/include/synor/storage.hpp

@@ -0,0 +1,174 @@
+/**
+ * @file storage.hpp
+ * @brief Synor Storage SDK for C++
+ *
+ * Modern C++17 SDK for IPFS-compatible decentralized storage.
+ */
+
+#pragma once
+
+#include <string>
+#include <vector>
+#include <optional>
+#include <future>
+#include <memory>
+#include <functional>
+#include <cstdint>
+#include <span>
+#include "wallet.hpp"  // For SynorException
+
+namespace synor {
+namespace storage {
+
+/// Pin status
+enum class PinStatus {
+    Queued,
+    Pinning,
+    Pinned,
+    Failed,
+    Unpinned
+};
+
+/// Hash algorithm
+enum class HashAlgorithm {
+    Sha2_256,
+    Blake3
+};
+
+/// Entry type
+enum class EntryType {
+    File,
+    Directory
+};
+
+/// Storage configuration
+struct Config {
+    std::string api_key;
+    std::string endpoint = "https://storage.synor.io/v1";
+    std::string gateway = "https://gateway.synor.io";
+    uint32_t timeout_ms = 60000;
+    uint32_t retries = 3;
+    bool debug = false;
+};
+
+/// Upload options
+struct UploadOptions {
+    std::optional<std::string> name;
+    bool wrap_with_directory = false;
+    HashAlgorithm hash_algorithm = HashAlgorithm::Sha2_256;
+    std::optional<int32_t> chunk_size;
+    std::optional<int32_t> pin_duration_days;
+};
+
+/// Upload response
+struct UploadResponse {
+    std::string cid;
+    int64_t size;
+    std::optional<std::string> name;
+    std::string created_at;
+};
+
+/// Pin information
+struct Pin {
+    std::string cid;
+    std::optional<std::string> name;
+    PinStatus status;
+    int64_t size;
+    std::string created_at;
+    std::optional<std::string> expires_at;
+    std::vector<std::string> delegates;
+};
+
+/// Pin request
+struct PinRequest {
+    std::string cid;
+    std::optional<std::string> name;
+    std::optional<int32_t> duration_days;
+    std::vector<std::string> origins;
+    std::map<std::string, std::string> meta;
+};
+
+/// CAR file information
+struct CarFile {
+    std::string cid;
+    int64_t size;
+    std::vector<std::string> roots;
+    std::string created_at;
+};
+
+/// File entry for upload
+struct FileEntry {
+    std::string path;
+    std::vector<uint8_t> content;
+};
+
+/// Directory entry
+struct DirectoryEntry {
+    std::string name;
+    std::string cid;
+    int64_t size;
+    EntryType type;
+};
+
+/// Storage statistics
+struct StorageStats {
+    int64_t total_size;
+    int32_t pin_count;
+    int64_t bandwidth_used;
+    double quota_used;
+};
+
+/// Storage client
+class Client {
+public:
+    explicit Client(const Config& config);
+    ~Client();
+
+    Client(const Client&) = delete;
+    Client& operator=(const Client&) = delete;
+    Client(Client&&) noexcept;
+    Client& operator=(Client&&) noexcept;
+
+    // Upload operations
+    UploadResponse upload(std::span<const uint8_t> data,
+                          const UploadOptions& options = {});
+    std::future<UploadResponse> upload_async(std::vector<uint8_t> data,
+                                              UploadOptions options = {});
+    UploadResponse upload_directory(const std::vector<FileEntry>& files,
+                                     const std::optional<std::string>& dir_name = std::nullopt);
+
+    // Download operations
+    std::vector<uint8_t> download(const std::string& cid);
+    std::future<std::vector<uint8_t>> download_async(const std::string& cid);
+    void download_stream(const std::string& cid,
+                         std::function<void(std::span<const uint8_t>)> callback);
+
+    /// Get gateway URL for content
+    std::string get_gateway_url(const std::string& cid,
+                                 const std::optional<std::string>& path = std::nullopt);
+
+    // Pinning operations
+    Pin pin(const PinRequest& request);
+    void unpin(const std::string& cid);
+    Pin get_pin_status(const std::string& cid);
+    std::vector<Pin> list_pins(std::optional<PinStatus> status = std::nullopt,
+                               int32_t limit = 50, int32_t offset = 0);
+
+    // CAR file operations
+    CarFile create_car(const std::vector<FileEntry>& entries);
+    std::vector<std::string> import_car(std::span<const uint8_t> car_data);
+    std::vector<uint8_t> export_car(const std::string& cid);
+
+    // Directory operations
+    std::vector<DirectoryEntry> list_directory(const std::string& cid);
+
+    // Statistics
+    StorageStats get_stats();
+
+private:
+    class Impl;
+    std::unique_ptr<Impl> impl_;
+};
+
+} // namespace storage
+} // namespace synor

sdk/cpp/include/synor/synor.hpp

@@ -0,0 +1,68 @@
+/**
+ * @file synor.hpp
+ * @brief Synor SDK for C++ - Main Include Header
+ *
+ * This header includes all Synor SDK components:
+ * - Wallet: Key management and transaction signing
+ * - RPC: Blockchain queries and subscriptions
+ * - Storage: IPFS-compatible decentralized storage
+ *
+ * @example
+ * ```cpp
+ * #include <synor/synor.hpp>
+ *
+ * int main() {
+ *     // Create clients
+ *     synor::wallet::Client wallet({.api_key = "your-api-key"});
+ *     synor::rpc::Client rpc({.api_key = "your-api-key"});
+ *     synor::storage::Client storage({.api_key = "your-api-key"});
+ *
+ *     // Use the SDKs...
+ *     return 0;
+ * }
+ * ```
+ */
+
+#pragma once
+
+#include "wallet.hpp"
+#include "rpc.hpp"
+#include "storage.hpp"
+
+namespace synor {
+
+/// SDK version
+inline constexpr const char* VERSION = "0.1.0";
+
+/// Convert Network to string
+inline const char* to_string(Network network) {
+    switch (network) {
+        case Network::Mainnet: return "mainnet";
+        case Network::Testnet: return "testnet";
+        case Network::Devnet: return "devnet";
+        default: return "unknown";
+    }
+}
+
+/// Convert WalletType to string
+inline const char* to_string(WalletType type) {
+    switch (type) {
+        case WalletType::Standard: return "standard";
+        case WalletType::Multisig: return "multisig";
+        case WalletType::Hardware: return "hardware";
+        case WalletType::Stealth: return "stealth";
+        default: return "unknown";
+    }
+}
+
+/// Convert Priority to string
+inline const char* to_string(Priority priority) {
+    switch (priority) {
+        case Priority::Low: return "low";
+        case Priority::Medium: return "medium";
+        case Priority::High: return "high";
+        default: return "unknown";
+    }
+}
+
+} // namespace synor

sdk/cpp/include/synor/wallet.hpp

@@ -0,0 +1,242 @@
+/**
+ * @file wallet.hpp
+ * @brief Synor Wallet SDK for C++
+ *
+ * Modern C++17 SDK for key management, transaction signing, and balance queries.
+ *
+ * @example
+ * ```cpp
+ * #include <synor/wallet.hpp>
+ *
+ * int main() {
+ *     synor::wallet::Config config{
+ *         .api_key = "your-api-key",
+ *         .endpoint = "https://wallet.synor.io/v1",
+ *         .network = synor::Network::Mainnet
+ *     };
+ *
+ *     synor::wallet::Client client(config);
+ *
+ *     // Create wallet
+ *     auto result = client.create_wallet(synor::WalletType::Standard);
+ *     std::cout << "Wallet ID: " << result.wallet.id << "\n";
+ *     std::cout << "Mnemonic: " << result.mnemonic.value_or("N/A") << "\n";
+ *
+ *     // Get balance
+ *     auto balance = client.get_balance(result.wallet.addresses[0].address);
+ *     std::cout << "Balance: " << balance.total << "\n";
+ *
+ *     return 0;
+ * }
+ * ```
+ */
+
+#pragma once
+
+#include <string>
+#include <vector>
+#include <optional>
+#include <future>
+#include <memory>
+#include <cstdint>
+#include <stdexcept>
+
+namespace synor {
+
+// Forward declarations
+namespace wallet { class Client; }
+
+/// Network environment
+enum class Network {
+    Mainnet,
+    Testnet,
+    Devnet
+};
+
+/// Wallet type
+enum class WalletType {
+    Standard,
+    Multisig,
+    Hardware,
+    Stealth
+};
+
+/// Transaction priority
+enum class Priority {
+    Low,
+    Medium,
+    High
+};
+
+/// SDK exception
+class SynorException : public std::runtime_error {
+public:
+    explicit SynorException(const std::string& message, int status_code = 0)
+        : std::runtime_error(message), status_code_(status_code) {}
+
+    int status_code() const noexcept { return status_code_; }
+
+private:
+    int status_code_;
+};
+
+namespace wallet {
+
+/// Wallet configuration
+struct Config {
+    std::string api_key;
+    std::string endpoint = "https://wallet.synor.io/v1";
+    Network network = Network::Mainnet;
+    uint32_t timeout_ms = 30000;
+    uint32_t retries = 3;
+    bool debug = false;
+};
+
+/// Wallet address
+struct Address {
+    std::string address;
+    int32_t index;
+    bool is_change = false;
+};
+
+/// Wallet information
+struct Wallet {
+    std::string id;
+    WalletType type;
+    Network network;
+    std::vector<Address> addresses;
+    std::string created_at;
+};
+
+/// Stealth address for privacy transactions
+struct StealthAddress {
+    std::string spend_public_key;
+    std::string view_public_key;
+    std::string one_time_address;
+};
+
+/// Result of wallet creation
+struct CreateWalletResult {
+    Wallet wallet;
+    std::optional<std::string> mnemonic;
+};
+
+/// Transaction input (UTXO reference)
+struct TransactionInput {
+    std::string txid;
+    int32_t vout;
+    int64_t amount;
+};
+
+/// Transaction output
+struct TransactionOutput {
+    std::string address;
+    int64_t amount;
+};
+
+/// Transaction for signing
+struct Transaction {
+    std::vector<TransactionInput> inputs;
+    std::vector<TransactionOutput> outputs;
+    std::optional<int64_t> fee;
+    Priority priority = Priority::Medium;
+};
+
+/// Signed transaction
+struct SignedTransaction {
+    std::string txid;
+    std::string hex;
+    int32_t size;
+    int64_t fee;
+};
+
+/// Cryptographic signature
+struct Signature {
+    std::string signature;
+    std::string address;
+    std::optional<int32_t> recovery_id;
+};
+
+/// Unspent transaction output
+struct UTXO {
+    std::string txid;
+    int32_t vout;
+    int64_t amount;
+    std::string address;
+    int32_t confirmations;
+    std::optional<std::string> script_pubkey;
+};
+
+/// Wallet balance
+struct Balance {
+    int64_t confirmed;
+    int64_t unconfirmed;
+    int64_t total;
+};
+
+/// Wallet client
+class Client {
+public:
+    explicit Client(const Config& config);
+    ~Client();
+
+    // Disable copy
+    Client(const Client&) = delete;
+    Client& operator=(const Client&) = delete;
+
+    // Enable move
+    Client(Client&&) noexcept;
+    Client& operator=(Client&&) noexcept;
+
+    /// Create a new wallet
+    CreateWalletResult create_wallet(WalletType type = WalletType::Standard);
+
+    /// Create a new wallet asynchronously
+    std::future<CreateWalletResult> create_wallet_async(WalletType type = WalletType::Standard);
+
+    /// Import a wallet from mnemonic
+    Wallet import_wallet(const std::string& mnemonic,
+                         const std::optional<std::string>& passphrase = std::nullopt);
+
+    /// Get a wallet by ID
+    Wallet get_wallet(const std::string& wallet_id);
+
+    /// Generate a new address
+    Address generate_address(const std::string& wallet_id, bool is_change = false);
+
+    /// Get stealth address
+    StealthAddress get_stealth_address(const std::string& wallet_id);
+
+    /// Sign a transaction
+    SignedTransaction sign_transaction(const std::string& wallet_id,
+                                        const Transaction& transaction);
+
+    /// Sign a message
+    Signature sign_message(const std::string& wallet_id,
+                           const std::string& message,
+                           int32_t address_index = 0);
+
+    /// Verify a message signature
+    bool verify_message(const std::string& message,
+                        const std::string& signature,
+                        const std::string& address);
+
+    /// Get balance for an address
+    Balance get_balance(const std::string& address);
+
+    /// Get balance asynchronously
+    std::future<Balance> get_balance_async(const std::string& address);
+
+    /// Get UTXOs for an address
+    std::vector<UTXO> get_utxos(const std::string& address, int32_t min_confirmations = 1);
+
+    /// Estimate transaction fee
+    int64_t estimate_fee(Priority priority = Priority::Medium);
+
+private:
+    class Impl;
+    std::unique_ptr<Impl> impl_;
+};
+
+} // namespace wallet
+} // namespace synor

sdk/cpp/src/rpc/rpc.cpp

@@ -0,0 +1,145 @@
+/**
+ * @file rpc.cpp
+ * @brief Synor RPC SDK implementation for C++
+ */
+
+#include "synor/rpc.hpp"
+#include <stdexcept>
+
+namespace synor {
+namespace rpc {
+
+// Subscription implementation
+Subscription::Subscription(const std::string& id, const std::string& channel,
+                           std::function<void()> on_cancel)
+    : id_(id), channel_(channel), on_cancel_(std::move(on_cancel)) {}
+
+Subscription::~Subscription() {
+    cancel();
+}
+
+Subscription::Subscription(Subscription&&) noexcept = default;
+Subscription& Subscription::operator=(Subscription&&) noexcept = default;
+
+void Subscription::cancel() {
+    if (on_cancel_) {
+        on_cancel_();
+        on_cancel_ = nullptr;
+    }
+}
+
+// Client implementation
+class Client::Impl {
+public:
+    explicit Impl(const Config& config) : config_(config) {}
+
+    Config config_;
+    // HTTP client and WebSocket would go here
+};
+
+Client::Client(const Config& config)
+    : impl_(std::make_unique<Impl>(config)) {}
+
+Client::~Client() = default;
+
+Client::Client(Client&&) noexcept = default;
+Client& Client::operator=(Client&&) noexcept = default;
+
+Block Client::get_latest_block() {
+    throw SynorException("Not implemented");
+}
+
+std::future<Block> Client::get_latest_block_async() {
+    return std::async(std::launch::async, [this]() {
+        return this->get_latest_block();
+    });
+}
+
+Block Client::get_block(const std::string& hash_or_height) {
+    (void)hash_or_height;
+    throw SynorException("Not implemented");
+}
+
+BlockHeader Client::get_block_header(const std::string& hash_or_height) {
+    (void)hash_or_height;
+    throw SynorException("Not implemented");
+}
+
+std::vector<Block> Client::get_blocks(int64_t start_height, int64_t end_height) {
+    (void)start_height;
+    (void)end_height;
+    throw SynorException("Not implemented");
+}
+
+Transaction Client::get_transaction(const std::string& txid) {
+    (void)txid;
+    throw SynorException("Not implemented");
+}
+
+std::string Client::get_raw_transaction(const std::string& txid) {
+    (void)txid;
+    throw SynorException("Not implemented");
+}
+
+SubmitResult Client::send_raw_transaction(const std::string& hex) {
+    (void)hex;
+    throw SynorException("Not implemented");
+}
+
+Transaction Client::decode_raw_transaction(const std::string& hex) {
+    (void)hex;
+    throw SynorException("Not implemented");
+}
+
+std::vector<Transaction> Client::get_address_transactions(
+    const std::string& address, int32_t limit, int32_t offset) {
+    (void)address;
+    (void)limit;
+    (void)offset;
+    throw SynorException("Not implemented");
+}
+
+FeeEstimate Client::estimate_fee(Priority priority) {
+    (void)priority;
+    throw SynorException("Not implemented");
+}
+
+std::map<Priority, FeeEstimate> Client::get_all_fee_estimates() {
+    throw SynorException("Not implemented");
+}
+
+ChainInfo Client::get_chain_info() {
+    throw SynorException("Not implemented");
+}
+
+MempoolInfo Client::get_mempool_info() {
+    throw SynorException("Not implemented");
+}
+
+std::vector<std::string> Client::get_mempool_transactions(int32_t limit) {
+    (void)limit;
+    throw SynorException("Not implemented");
+}
+
+std::unique_ptr<Subscription> Client::subscribe_blocks(
+    std::function<void(const Block&)> callback) {
+    (void)callback;
+    throw SynorException("Not implemented");
+}
+
+std::unique_ptr<Subscription> Client::subscribe_address(
+    const std::string& address,
+    std::function<void(const Transaction&)> callback) {
+    (void)address;
+    (void)callback;
+    throw SynorException("Not implemented");
+}
+
+std::unique_ptr<Subscription> Client::subscribe_mempool(
+    std::function<void(const Transaction&)> callback) {
+    (void)callback;
+    throw SynorException("Not implemented");
+}
+
+} // namespace rpc
+} // namespace synor

sdk/cpp/src/storage/storage.cpp

@@ -0,0 +1,126 @@
+/**
+ * @file storage.cpp
+ * @brief Synor Storage SDK implementation for C++
+ */
+
+#include "synor/storage.hpp"
+#include <sstream>
+
+namespace synor {
+namespace storage {
+
+// Client implementation
+class Client::Impl {
+public:
+    explicit Impl(const Config& config) : config_(config) {}
+
+    Config config_;
+    // HTTP client would go here
+};
+
+Client::Client(const Config& config)
+    : impl_(std::make_unique<Impl>(config)) {}
+
+Client::~Client() = default;
+
+Client::Client(Client&&) noexcept = default;
+Client& Client::operator=(Client&&) noexcept = default;
+
+UploadResponse Client::upload(std::span<const uint8_t> data,
+                               const UploadOptions& options) {
+    (void)data;
+    (void)options;
+    throw SynorException("Not implemented");
+}
+
+std::future<UploadResponse> Client::upload_async(std::vector<uint8_t> data,
+                                                  UploadOptions options) {
+    return std::async(std::launch::async, [this, data = std::move(data), options]() {
+        return this->upload(std::span{data}, options);
+    });
+}
+
+UploadResponse Client::upload_directory(const std::vector<FileEntry>& files,
+                                         const std::optional<std::string>& dir_name) {
+    (void)files;
+    (void)dir_name;
+    throw SynorException("Not implemented");
+}
+
+std::vector<uint8_t> Client::download(const std::string& cid) {
+    (void)cid;
+    throw SynorException("Not implemented");
+}
+
+std::future<std::vector<uint8_t>> Client::download_async(const std::string& cid) {
+    return std::async(std::launch::async, [this, cid]() {
+        return this->download(cid);
+    });
+}
+
+void Client::download_stream(const std::string& cid,
+                              std::function<void(std::span<const uint8_t>)> callback) {
+    (void)cid;
+    (void)callback;
+    throw SynorException("Not implemented");
+}
+
+std::string Client::get_gateway_url(const std::string& cid,
+                                     const std::optional<std::string>& path) {
+    std::ostringstream oss;
+    oss << impl_->config_.gateway << "/ipfs/" << cid;
+    if (path) {
+        oss << "/" << *path;
+    }
+    return oss.str();
+}
+
+Pin Client::pin(const PinRequest& request) {
+    (void)request;
+    throw SynorException("Not implemented");
+}
+
+void Client::unpin(const std::string& cid) {
+    (void)cid;
+    throw SynorException("Not implemented");
+}
+
+Pin Client::get_pin_status(const std::string& cid) {
+    (void)cid;
+    throw SynorException("Not implemented");
+}
+
+std::vector<Pin> Client::list_pins(std::optional<PinStatus> status,
+                                    int32_t limit, int32_t offset) {
+    (void)status;
+    (void)limit;
+    (void)offset;
+    throw SynorException("Not implemented");
+}
+
+CarFile Client::create_car(const std::vector<FileEntry>& entries) {
+    (void)entries;
+    throw SynorException("Not implemented");
+}
+
+std::vector<std::string> Client::import_car(std::span<const uint8_t> car_data) {
+    (void)car_data;
+    throw SynorException("Not implemented");
+}
+
+std::vector<uint8_t> Client::export_car(const std::string& cid) {
+    (void)cid;
+    throw SynorException("Not implemented");
+}
+
+std::vector<DirectoryEntry> Client::list_directory(const std::string& cid) {
+    (void)cid;
+    throw SynorException("Not implemented");
+}
+
+StorageStats Client::get_stats() {
+    throw SynorException("Not implemented");
+}
+
+} // namespace storage
+} // namespace synor

sdk/cpp/src/wallet/wallet.cpp

@@ -0,0 +1,113 @@
+/**
+ * @file wallet.cpp
+ * @brief Synor Wallet SDK implementation for C++
+ */
+
+#include "synor/wallet.hpp"
+#include <stdexcept>
+
+namespace synor {
+namespace wallet {
+
+// Implementation class (pimpl pattern)
+class Client::Impl {
+public:
+    explicit Impl(const Config& config) : config_(config) {}
+
+    Config config_;
+    // HTTP client would go here
+};
+
+Client::Client(const Config& config)
+    : impl_(std::make_unique<Impl>(config)) {}
+
+Client::~Client() = default;
+
+Client::Client(Client&&) noexcept = default;
+Client& Client::operator=(Client&&) noexcept = default;
+
+CreateWalletResult Client::create_wallet(WalletType type) {
+    // TODO: Implement HTTP request
+    (void)type;
+    throw SynorException("Not implemented");
+}
+
+std::future<CreateWalletResult> Client::create_wallet_async(WalletType type) {
+    return std::async(std::launch::async, [this, type]() {
+        return this->create_wallet(type);
+    });
+}
+
+Wallet Client::import_wallet(const std::string& mnemonic,
+                              const std::optional<std::string>& passphrase) {
+    (void)mnemonic;
+    (void)passphrase;
+    throw SynorException("Not implemented");
+}
+
+Wallet Client::get_wallet(const std::string& wallet_id) {
+    (void)wallet_id;
+    throw SynorException("Not implemented");
+}
+
+Address Client::generate_address(const std::string& wallet_id, bool is_change) {
+    (void)wallet_id;
+    (void)is_change;
+    throw SynorException("Not implemented");
+}
+
+StealthAddress Client::get_stealth_address(const std::string& wallet_id) {
+    (void)wallet_id;
+    throw SynorException("Not implemented");
+}
+
+SignedTransaction Client::sign_transaction(const std::string& wallet_id,
+                                            const Transaction& transaction) {
+    (void)wallet_id;
+    (void)transaction;
+    throw SynorException("Not implemented");
+}
+
+Signature Client::sign_message(const std::string& wallet_id,
+                                const std::string& message,
+                                int32_t address_index) {
+    (void)wallet_id;
+    (void)message;
+    (void)address_index;
+    throw SynorException("Not implemented");
+}
+
+bool Client::verify_message(const std::string& message,
+                            const std::string& signature,
+                            const std::string& address) {
+    (void)message;
+    (void)signature;
+    (void)address;
+    throw SynorException("Not implemented");
+}
+
+Balance Client::get_balance(const std::string& address) {
+    (void)address;
+    throw SynorException("Not implemented");
+}
+
+std::future<Balance> Client::get_balance_async(const std::string& address) {
+    return std::async(std::launch::async, [this, address]() {
+        return this->get_balance(address);
+    });
+}
+
+std::vector<UTXO> Client::get_utxos(const std::string& address,
+                                     int32_t min_confirmations) {
+    (void)address;
+    (void)min_confirmations;
+    throw SynorException("Not implemented");
+}
+
+int64_t Client::estimate_fee(Priority priority) {
+    (void)priority;
+    throw SynorException("Not implemented");
+}
+
+} // namespace wallet
+} // namespace synor

sdk/csharp/Synor.Sdk/Rpc/SynorRpc.cs

@@ -0,0 +1,477 @@
+using System.Net.Http.Json;
+using System.Net.WebSockets;
+using System.Text;
+using System.Text.Json;
+
+namespace Synor.Sdk.Rpc;
+
+/// <summary>
+/// Synor RPC SDK client for C#.
+///
+/// Provides blockchain data queries, transaction submission,
+/// and real-time subscriptions via WebSocket.
+/// </summary>
+/// <example>
+/// <code>
+/// var rpc = new SynorRpc(new RpcConfig { ApiKey = "your-api-key" });
+///
+/// // Get latest block
+/// var block = await rpc.GetLatestBlockAsync();
+/// Console.WriteLine($"Block height: {block.Height}");
+///
+/// // Subscribe to new blocks
+/// var subscription = await rpc.SubscribeBlocksAsync(block => {
+///     Console.WriteLine($"New block: {block.Height}");
+/// });
+///
+/// // Later: cancel subscription
+/// subscription.Cancel();
+/// rpc.Dispose();
+/// </code>
+/// </example>
+public class SynorRpc : IDisposable
+{
+    private readonly RpcConfig _config;
+    private readonly HttpClient _httpClient;
+    private readonly JsonSerializerOptions _jsonOptions;
+    private ClientWebSocket? _webSocket;
+    private CancellationTokenSource? _wsCancellation;
+    private readonly Dictionary<string, Action<JsonElement>> _subscriptionCallbacks = new();
+    private bool _disposed;
+
+    public SynorRpc(RpcConfig config)
+    {
+        _config = config;
+        _httpClient = new HttpClient
+        {
+            BaseAddress = new Uri(config.Endpoint),
+            Timeout = config.Timeout
+        };
+        _httpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {config.ApiKey}");
+
+        _jsonOptions = new JsonSerializerOptions
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+            PropertyNameCaseInsensitive = true
+        };
+    }
+
+    /// <summary>
+    /// Get the latest block.
+    /// </summary>
+    public async Task<Block> GetLatestBlockAsync(CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<Block>("/blocks/latest", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get a block by hash or height.
+    /// </summary>
+    public async Task<Block> GetBlockAsync(
+        string hashOrHeight,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<Block>($"/blocks/{hashOrHeight}", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get a block header by hash or height.
+    /// </summary>
+    public async Task<BlockHeader> GetBlockHeaderAsync(
+        string hashOrHeight,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<BlockHeader>($"/blocks/{hashOrHeight}/header", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get a range of blocks.
+    /// </summary>
+    public async Task<List<Block>> GetBlocksAsync(
+        long startHeight,
+        long endHeight,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<List<Block>>(
+            $"/blocks?start={startHeight}&end={endHeight}",
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// Get a transaction by ID.
+    /// </summary>
+    public async Task<RpcTransaction> GetTransactionAsync(
+        string txid,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<RpcTransaction>($"/transactions/{txid}", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get raw transaction hex.
+    /// </summary>
+    public async Task<string> GetRawTransactionAsync(
+        string txid,
+        CancellationToken cancellationToken = default)
+    {
+        var response = await GetAsync<JsonElement>($"/transactions/{txid}/raw", cancellationToken);
+        return response.GetProperty("hex").GetString() ?? throw new RpcException("Invalid response");
+    }
+
+    /// <summary>
+    /// Send a raw transaction.
+    /// </summary>
+    public async Task<SubmitResult> SendRawTransactionAsync(
+        string hex,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new { hex };
+        return await PostAsync<SubmitResult>("/transactions/send", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Decode a raw transaction.
+    /// </summary>
+    public async Task<RpcTransaction> DecodeRawTransactionAsync(
+        string hex,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new { hex };
+        return await PostAsync<RpcTransaction>("/transactions/decode", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Get transactions for an address.
+    /// </summary>
+    public async Task<List<RpcTransaction>> GetAddressTransactionsAsync(
+        string address,
+        int limit = 20,
+        int offset = 0,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<List<RpcTransaction>>(
+            $"/addresses/{address}/transactions?limit={limit}&offset={offset}",
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// Estimate transaction fee.
+    /// </summary>
+    public async Task<FeeEstimate> EstimateFeeAsync(
+        RpcPriority priority = RpcPriority.Medium,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<FeeEstimate>(
+            $"/fees/estimate?priority={priority.ToString().ToLower()}",
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// Get all fee estimates.
+    /// </summary>
+    public async Task<Dictionary<RpcPriority, FeeEstimate>> GetAllFeeEstimatesAsync(
+        CancellationToken cancellationToken = default)
+    {
+        var estimates = await GetAsync<List<FeeEstimate>>("/fees/estimates", cancellationToken);
+        return estimates.ToDictionary(e => e.Priority, e => e);
+    }
+
+    /// <summary>
+    /// Get chain information.
+    /// </summary>
+    public async Task<ChainInfo> GetChainInfoAsync(CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<ChainInfo>("/chain/info", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get mempool information.
+    /// </summary>
+    public async Task<MempoolInfo> GetMempoolInfoAsync(CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<MempoolInfo>("/mempool/info", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get mempool transaction IDs.
+    /// </summary>
+    public async Task<List<string>> GetMempoolTransactionsAsync(
+        int limit = 100,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<List<string>>($"/mempool/transactions?limit={limit}", cancellationToken);
+    }
+
+    /// <summary>
+    /// Subscribe to new blocks.
+    /// </summary>
+    public async Task<Subscription> SubscribeBlocksAsync(
+        Action<Block> callback,
+        CancellationToken cancellationToken = default)
+    {
+        await EnsureWebSocketConnectedAsync(cancellationToken);
+
+        var subscriptionId = Guid.NewGuid().ToString();
+        _subscriptionCallbacks[subscriptionId] = element =>
+        {
+            var block = element.Deserialize<Block>(_jsonOptions);
+            if (block != null) callback(block);
+        };
+
+        var subscribeMessage = JsonSerializer.Serialize(new
+        {
+            type = "subscribe",
+            channel = "blocks",
+            subscription_id = subscriptionId
+        });
+
+        await SendWebSocketMessageAsync(subscribeMessage, cancellationToken);
+
+        return new Subscription(subscriptionId, "blocks", () =>
+        {
+            _subscriptionCallbacks.Remove(subscriptionId);
+            var unsubscribeMessage = JsonSerializer.Serialize(new
+            {
+                type = "unsubscribe",
+                subscription_id = subscriptionId
+            });
+            _ = SendWebSocketMessageAsync(unsubscribeMessage, CancellationToken.None);
+        });
+    }
+
+    /// <summary>
+    /// Subscribe to address transactions.
+    /// </summary>
+    public async Task<Subscription> SubscribeAddressAsync(
+        string address,
+        Action<RpcTransaction> callback,
+        CancellationToken cancellationToken = default)
+    {
+        await EnsureWebSocketConnectedAsync(cancellationToken);
+
+        var subscriptionId = Guid.NewGuid().ToString();
+        _subscriptionCallbacks[subscriptionId] = element =>
+        {
+            var tx = element.Deserialize<RpcTransaction>(_jsonOptions);
+            if (tx != null) callback(tx);
+        };
+
+        var subscribeMessage = JsonSerializer.Serialize(new
+        {
+            type = "subscribe",
+            channel = "address",
+            address,
+            subscription_id = subscriptionId
+        });
+
+        await SendWebSocketMessageAsync(subscribeMessage, cancellationToken);
+
+        return new Subscription(subscriptionId, $"address:{address}", () =>
+        {
+            _subscriptionCallbacks.Remove(subscriptionId);
+            var unsubscribeMessage = JsonSerializer.Serialize(new
+            {
+                type = "unsubscribe",
+                subscription_id = subscriptionId
+            });
+            _ = SendWebSocketMessageAsync(unsubscribeMessage, CancellationToken.None);
+        });
+    }
+
+    /// <summary>
+    /// Subscribe to mempool transactions.
+    /// </summary>
+    public async Task<Subscription> SubscribeMempoolAsync(
+        Action<RpcTransaction> callback,
+        CancellationToken cancellationToken = default)
+    {
+        await EnsureWebSocketConnectedAsync(cancellationToken);
+
+        var subscriptionId = Guid.NewGuid().ToString();
+        _subscriptionCallbacks[subscriptionId] = element =>
+        {
+            var tx = element.Deserialize<RpcTransaction>(_jsonOptions);
+            if (tx != null) callback(tx);
+        };
+
+        var subscribeMessage = JsonSerializer.Serialize(new
+        {
+            type = "subscribe",
+            channel = "mempool",
+            subscription_id = subscriptionId
+        });
+
+        await SendWebSocketMessageAsync(subscribeMessage, cancellationToken);
+
+        return new Subscription(subscriptionId, "mempool", () =>
+        {
+            _subscriptionCallbacks.Remove(subscriptionId);
+            var unsubscribeMessage = JsonSerializer.Serialize(new
+            {
+                type = "unsubscribe",
+                subscription_id = subscriptionId
+            });
+            _ = SendWebSocketMessageAsync(unsubscribeMessage, CancellationToken.None);
+        });
+    }
+
+    private async Task EnsureWebSocketConnectedAsync(CancellationToken cancellationToken)
+    {
+        if (_webSocket?.State == WebSocketState.Open)
+            return;
+
+        _webSocket?.Dispose();
+        _wsCancellation?.Cancel();
+        _wsCancellation?.Dispose();
+
+        _webSocket = new ClientWebSocket();
+        _webSocket.Options.SetRequestHeader("Authorization", $"Bearer {_config.ApiKey}");
+        _wsCancellation = new CancellationTokenSource();
+
+        await _webSocket.ConnectAsync(new Uri(_config.WsEndpoint), cancellationToken);
+        _ = ReceiveWebSocketMessagesAsync(_wsCancellation.Token);
+    }
+
+    private async Task ReceiveWebSocketMessagesAsync(CancellationToken cancellationToken)
+    {
+        var buffer = new byte[8192];
+
+        try
+        {
+            while (_webSocket?.State == WebSocketState.Open && !cancellationToken.IsCancellationRequested)
+            {
+                var result = await _webSocket.ReceiveAsync(buffer, cancellationToken);
+
+                if (result.MessageType == WebSocketMessageType.Close)
+                    break;
+
+                if (result.MessageType == WebSocketMessageType.Text)
+                {
+                    var json = Encoding.UTF8.GetString(buffer, 0, result.Count);
+                    ProcessWebSocketMessage(json);
+                }
+            }
+        }
+        catch (OperationCanceledException)
+        {
+            // Expected when cancelling
+        }
+        catch (Exception ex)
+        {
+            if (_config.Debug)
+            {
+                Console.WriteLine($"WebSocket error: {ex.Message}");
+            }
+        }
+    }
+
+    private void ProcessWebSocketMessage(string json)
+    {
+        try
+        {
+            var doc = JsonDocument.Parse(json);
+            var root = doc.RootElement;
+
+            if (root.TryGetProperty("subscription_id", out var subIdElement))
+            {
+                var subscriptionId = subIdElement.GetString();
+                if (subscriptionId != null && _subscriptionCallbacks.TryGetValue(subscriptionId, out var callback))
+                {
+                    if (root.TryGetProperty("data", out var data))
+                    {
+                        callback(data);
+                    }
+                }
+            }
+        }
+        catch (Exception ex)
+        {
+            if (_config.Debug)
+            {
+                Console.WriteLine($"Error processing WebSocket message: {ex.Message}");
+            }
+        }
+    }
+
+    private async Task SendWebSocketMessageAsync(string message, CancellationToken cancellationToken)
+    {
+        if (_webSocket?.State == WebSocketState.Open)
+        {
+            var bytes = Encoding.UTF8.GetBytes(message);
+            await _webSocket.SendAsync(bytes, WebSocketMessageType.Text, true, cancellationToken);
+        }
+    }
+
+    private async Task<T> GetAsync<T>(string path, CancellationToken cancellationToken)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.GetAsync(path, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<T>(_jsonOptions, cancellationToken)
+                ?? throw new RpcException("Invalid response");
+        });
+    }
+
+    private async Task<T> PostAsync<T>(string path, object body, CancellationToken cancellationToken)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.PostAsJsonAsync(path, body, _jsonOptions, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<T>(_jsonOptions, cancellationToken)
+                ?? throw new RpcException("Invalid response");
+        });
+    }
+
+    private async Task EnsureSuccessAsync(HttpResponseMessage response)
+    {
+        if (!response.IsSuccessStatusCode)
+        {
+            var content = await response.Content.ReadAsStringAsync();
+            throw new RpcException(
+                $"HTTP error: {content}",
+                statusCode: (int)response.StatusCode);
+        }
+    }
+
+    private async Task<T> ExecuteWithRetryAsync<T>(Func<Task<T>> operation)
+    {
+        Exception? lastException = null;
+
+        for (int attempt = 0; attempt < _config.Retries; attempt++)
+        {
+            try
+            {
+                return await operation();
+            }
+            catch (Exception ex)
+            {
+                lastException = ex;
+                if (_config.Debug)
+                {
+                    Console.WriteLine($"Attempt {attempt + 1} failed: {ex.Message}");
+                }
+                if (attempt < _config.Retries - 1)
+                {
+                    await Task.Delay(TimeSpan.FromSeconds(attempt + 1));
+                }
+            }
+        }
+
+        throw lastException ?? new RpcException("Unknown error after retries");
+    }
+
+    public void Dispose()
+    {
+        if (!_disposed)
+        {
+            _wsCancellation?.Cancel();
+            _wsCancellation?.Dispose();
+            _webSocket?.Dispose();
+            _httpClient.Dispose();
+            _disposed = true;
+        }
+        GC.SuppressFinalize(this);
+    }
+}

sdk/csharp/Synor.Sdk/Rpc/Types.cs

@@ -0,0 +1,222 @@
+using System.Text.Json.Serialization;
+
+namespace Synor.Sdk.Rpc;
+
+/// <summary>
+/// Network environment.
+/// </summary>
+public enum RpcNetwork
+{
+    [JsonPropertyName("mainnet")] Mainnet,
+    [JsonPropertyName("testnet")] Testnet,
+    [JsonPropertyName("devnet")] Devnet
+}
+
+/// <summary>
+/// Transaction priority.
+/// </summary>
+public enum RpcPriority
+{
+    [JsonPropertyName("low")] Low,
+    [JsonPropertyName("medium")] Medium,
+    [JsonPropertyName("high")] High
+}
+
+/// <summary>
+/// Transaction status.
+/// </summary>
+public enum TransactionStatus
+{
+    [JsonPropertyName("pending")] Pending,
+    [JsonPropertyName("confirmed")] Confirmed,
+    [JsonPropertyName("failed")] Failed
+}
+
+/// <summary>
+/// RPC configuration.
+/// </summary>
+public class RpcConfig
+{
+    public required string ApiKey { get; init; }
+    public string Endpoint { get; init; } = "https://rpc.synor.io/v1";
+    public string WsEndpoint { get; init; } = "wss://rpc.synor.io/v1/ws";
+    public RpcNetwork Network { get; init; } = RpcNetwork.Mainnet;
+    public TimeSpan Timeout { get; init; } = TimeSpan.FromSeconds(30);
+    public int Retries { get; init; } = 3;
+    public bool Debug { get; init; } = false;
+}
+
+/// <summary>
+/// Block header information.
+/// </summary>
+public record BlockHeader(
+    [property: JsonPropertyName("hash")] string Hash,
+    [property: JsonPropertyName("height")] long Height,
+    [property: JsonPropertyName("previous_hash")] string PreviousHash,
+    [property: JsonPropertyName("timestamp")] long Timestamp,
+    [property: JsonPropertyName("version")] int Version,
+    [property: JsonPropertyName("merkle_root")] string MerkleRoot,
+    [property: JsonPropertyName("nonce")] long Nonce,
+    [property: JsonPropertyName("difficulty")] double Difficulty
+);
+
+/// <summary>
+/// Script public key.
+/// </summary>
+public record ScriptPubKey(
+    [property: JsonPropertyName("asm")] string Asm,
+    [property: JsonPropertyName("hex")] string Hex,
+    [property: JsonPropertyName("type")] string Type,
+    [property: JsonPropertyName("address")] string? Address = null
+);
+
+/// <summary>
+/// Transaction input.
+/// </summary>
+public record RpcTransactionInput(
+    [property: JsonPropertyName("txid")] string Txid,
+    [property: JsonPropertyName("vout")] int Vout,
+    [property: JsonPropertyName("script_sig")] string? ScriptSig,
+    [property: JsonPropertyName("sequence")] long Sequence,
+    [property: JsonPropertyName("witness")] List<string>? Witness = null
+);
+
+/// <summary>
+/// Transaction output.
+/// </summary>
+public record RpcTransactionOutput(
+    [property: JsonPropertyName("value")] long Value,
+    [property: JsonPropertyName("n")] int N,
+    [property: JsonPropertyName("script_pubkey")] ScriptPubKey ScriptPubKey
+);
+
+/// <summary>
+/// A blockchain transaction.
+/// </summary>
+public record RpcTransaction(
+    [property: JsonPropertyName("txid")] string Txid,
+    [property: JsonPropertyName("hash")] string Hash,
+    [property: JsonPropertyName("version")] int Version,
+    [property: JsonPropertyName("size")] int Size,
+    [property: JsonPropertyName("weight")] int Weight,
+    [property: JsonPropertyName("lock_time")] long LockTime,
+    [property: JsonPropertyName("inputs")] List<RpcTransactionInput> Inputs,
+    [property: JsonPropertyName("outputs")] List<RpcTransactionOutput> Outputs,
+    [property: JsonPropertyName("fee")] long Fee,
+    [property: JsonPropertyName("confirmations")] int Confirmations,
+    [property: JsonPropertyName("block_hash")] string? BlockHash = null,
+    [property: JsonPropertyName("block_height")] long? BlockHeight = null,
+    [property: JsonPropertyName("timestamp")] long? Timestamp = null,
+    [property: JsonPropertyName("status")] TransactionStatus Status = TransactionStatus.Pending
+);
+
+/// <summary>
+/// A blockchain block.
+/// </summary>
+public record Block(
+    [property: JsonPropertyName("hash")] string Hash,
+    [property: JsonPropertyName("height")] long Height,
+    [property: JsonPropertyName("previous_hash")] string PreviousHash,
+    [property: JsonPropertyName("timestamp")] long Timestamp,
+    [property: JsonPropertyName("version")] int Version,
+    [property: JsonPropertyName("merkle_root")] string MerkleRoot,
+    [property: JsonPropertyName("nonce")] long Nonce,
+    [property: JsonPropertyName("difficulty")] double Difficulty,
+    [property: JsonPropertyName("transactions")] List<RpcTransaction> Transactions,
+    [property: JsonPropertyName("size")] int Size,
+    [property: JsonPropertyName("weight")] int Weight
+);
+
+/// <summary>
+/// Chain information.
+/// </summary>
+public record ChainInfo(
+    [property: JsonPropertyName("chain")] string Chain,
+    [property: JsonPropertyName("blocks")] long Blocks,
+    [property: JsonPropertyName("headers")] long Headers,
+    [property: JsonPropertyName("best_block_hash")] string BestBlockHash,
+    [property: JsonPropertyName("difficulty")] double Difficulty,
+    [property: JsonPropertyName("median_time")] long MedianTime,
+    [property: JsonPropertyName("verification_progress")] double VerificationProgress,
+    [property: JsonPropertyName("chain_work")] string ChainWork,
+    [property: JsonPropertyName("pruned")] bool Pruned
+);
+
+/// <summary>
+/// Mempool information.
+/// </summary>
+public record MempoolInfo(
+    [property: JsonPropertyName("size")] int Size,
+    [property: JsonPropertyName("bytes")] long Bytes,
+    [property: JsonPropertyName("usage")] long Usage,
+    [property: JsonPropertyName("max_mempool")] long MaxMempool,
+    [property: JsonPropertyName("mempool_min_fee")] double MempoolMinFee,
+    [property: JsonPropertyName("min_relay_tx_fee")] double MinRelayTxFee
+);
+
+/// <summary>
+/// Fee estimate.
+/// </summary>
+public record FeeEstimate(
+    [property: JsonPropertyName("priority")] RpcPriority Priority,
+    [property: JsonPropertyName("fee_rate")] long FeeRate,
+    [property: JsonPropertyName("estimated_blocks")] int EstimatedBlocks
+);
+
+/// <summary>
+/// Submit result.
+/// </summary>
+public record SubmitResult(
+    [property: JsonPropertyName("txid")] string Txid,
+    [property: JsonPropertyName("accepted")] bool Accepted,
+    [property: JsonPropertyName("reason")] string? Reason = null
+);
+
+/// <summary>
+/// Subscription handle.
+/// </summary>
+public class Subscription : IDisposable
+{
+    public string Id { get; }
+    public string Channel { get; }
+    private readonly Action _onCancel;
+    private bool _disposed;
+
+    public Subscription(string id, string channel, Action onCancel)
+    {
+        Id = id;
+        Channel = channel;
+        _onCancel = onCancel;
+    }
+
+    public void Cancel()
+    {
+        if (!_disposed)
+        {
+            _onCancel();
+            _disposed = true;
+        }
+    }
+
+    public void Dispose()
+    {
+        Cancel();
+        GC.SuppressFinalize(this);
+    }
+}
+
+/// <summary>
+/// RPC exception.
+/// </summary>
+public class RpcException : Exception
+{
+    public string? Code { get; }
+    public int? StatusCode { get; }
+
+    public RpcException(string message, string? code = null, int? statusCode = null)
+        : base(message)
+    {
+        Code = code;
+        StatusCode = statusCode;
+    }
+}

sdk/csharp/Synor.Sdk/Storage/SynorStorage.cs

@@ -0,0 +1,392 @@
+using System.Net.Http.Headers;
+using System.Net.Http.Json;
+using System.Text.Json;
+
+namespace Synor.Sdk.Storage;
+
+/// <summary>
+/// Synor Storage SDK client for C#.
+///
+/// Provides decentralized storage operations including upload, download,
+/// pinning, and directory management.
+/// </summary>
+/// <example>
+/// <code>
+/// var storage = new SynorStorage(new StorageConfig { ApiKey = "your-api-key" });
+///
+/// // Upload a file
+/// var data = File.ReadAllBytes("document.pdf");
+/// var result = await storage.UploadAsync(data, new UploadOptions { Name = "document.pdf" });
+/// Console.WriteLine($"CID: {result.Cid}");
+///
+/// // Download a file
+/// var downloaded = await storage.DownloadAsync(result.Cid);
+/// File.WriteAllBytes("downloaded.pdf", downloaded);
+///
+/// storage.Dispose();
+/// </code>
+/// </example>
+public class SynorStorage : IDisposable
+{
+    private readonly StorageConfig _config;
+    private readonly HttpClient _httpClient;
+    private readonly JsonSerializerOptions _jsonOptions;
+    private bool _disposed;
+
+    public SynorStorage(StorageConfig config)
+    {
+        _config = config;
+        _httpClient = new HttpClient
+        {
+            BaseAddress = new Uri(config.Endpoint),
+            Timeout = config.Timeout
+        };
+        _httpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {config.ApiKey}");
+
+        _jsonOptions = new JsonSerializerOptions
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+            PropertyNameCaseInsensitive = true
+        };
+    }
+
+    /// <summary>
+    /// Upload data to storage.
+    /// </summary>
+    public async Task<UploadResponse> UploadAsync(
+        byte[] data,
+        UploadOptions? options = null,
+        CancellationToken cancellationToken = default)
+    {
+        options ??= new UploadOptions();
+
+        using var content = new MultipartFormDataContent();
+        var fileContent = new ByteArrayContent(data);
+
+        if (!string.IsNullOrEmpty(options.ContentType))
+        {
+            fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse(options.ContentType);
+        }
+
+        content.Add(fileContent, "file", options.Name ?? "file");
+
+        if (options.Metadata != null)
+        {
+            foreach (var (key, value) in options.Metadata)
+            {
+                content.Add(new StringContent(value), $"metadata[{key}]");
+            }
+        }
+
+        content.Add(new StringContent(options.Pin.ToString().ToLower()), "pin");
+        content.Add(new StringContent(options.WrapWithDirectory.ToString().ToLower()), "wrap_with_directory");
+
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.PostAsync("/upload", content, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<UploadResponse>(_jsonOptions, cancellationToken)
+                ?? throw new StorageException("Invalid response");
+        });
+    }
+
+    /// <summary>
+    /// Upload a stream to storage.
+    /// </summary>
+    public async Task<UploadResponse> UploadStreamAsync(
+        Stream stream,
+        UploadOptions? options = null,
+        CancellationToken cancellationToken = default)
+    {
+        options ??= new UploadOptions();
+
+        using var content = new MultipartFormDataContent();
+        var streamContent = new StreamContent(stream);
+
+        if (!string.IsNullOrEmpty(options.ContentType))
+        {
+            streamContent.Headers.ContentType = MediaTypeHeaderValue.Parse(options.ContentType);
+        }
+
+        content.Add(streamContent, "file", options.Name ?? "file");
+        content.Add(new StringContent(options.Pin.ToString().ToLower()), "pin");
+
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.PostAsync("/upload", content, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<UploadResponse>(_jsonOptions, cancellationToken)
+                ?? throw new StorageException("Invalid response");
+        });
+    }
+
+    /// <summary>
+    /// Upload a directory of files.
+    /// </summary>
+    public async Task<UploadResponse> UploadDirectoryAsync(
+        IEnumerable<FileEntry> files,
+        string? directoryName = null,
+        CancellationToken cancellationToken = default)
+    {
+        using var content = new MultipartFormDataContent();
+
+        foreach (var file in files)
+        {
+            var fileContent = new ByteArrayContent(file.Content);
+            if (!string.IsNullOrEmpty(file.ContentType))
+            {
+                fileContent.Headers.ContentType = MediaTypeHeaderValue.Parse(file.ContentType);
+            }
+            content.Add(fileContent, "files", file.Path);
+        }
+
+        if (!string.IsNullOrEmpty(directoryName))
+        {
+            content.Add(new StringContent(directoryName), "directory_name");
+        }
+
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.PostAsync("/upload/directory", content, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<UploadResponse>(_jsonOptions, cancellationToken)
+                ?? throw new StorageException("Invalid response");
+        });
+    }
+
+    /// <summary>
+    /// Download content by CID.
+    /// </summary>
+    public async Task<byte[]> DownloadAsync(
+        string cid,
+        CancellationToken cancellationToken = default)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.GetAsync($"/download/{cid}", cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadAsByteArrayAsync(cancellationToken);
+        });
+    }
+
+    /// <summary>
+    /// Download content as a stream.
+    /// </summary>
+    public async Task<Stream> DownloadStreamAsync(
+        string cid,
+        CancellationToken cancellationToken = default)
+    {
+        var response = await _httpClient.GetAsync(
+            $"/download/{cid}",
+            HttpCompletionOption.ResponseHeadersRead,
+            cancellationToken);
+        await EnsureSuccessAsync(response);
+        return await response.Content.ReadAsStreamAsync(cancellationToken);
+    }
+
+    /// <summary>
+    /// Get gateway URL for a CID.
+    /// </summary>
+    public string GetGatewayUrl(string cid, string? path = null)
+    {
+        var url = $"{_config.Gateway}/ipfs/{cid}";
+        if (!string.IsNullOrEmpty(path))
+        {
+            url += $"/{path.TrimStart('/')}";
+        }
+        return url;
+    }
+
+    /// <summary>
+    /// Pin content by CID.
+    /// </summary>
+    public async Task<Pin> PinAsync(
+        PinRequest request,
+        CancellationToken cancellationToken = default)
+    {
+        return await PostAsync<Pin>("/pins", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Unpin content.
+    /// </summary>
+    public async Task UnpinAsync(
+        string cid,
+        CancellationToken cancellationToken = default)
+    {
+        await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.DeleteAsync($"/pins/{cid}", cancellationToken);
+            await EnsureSuccessAsync(response);
+            return true;
+        });
+    }
+
+    /// <summary>
+    /// Get pin status.
+    /// </summary>
+    public async Task<Pin> GetPinStatusAsync(
+        string cid,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<Pin>($"/pins/{cid}", cancellationToken);
+    }
+
+    /// <summary>
+    /// List pins.
+    /// </summary>
+    public async Task<List<Pin>> ListPinsAsync(
+        PinStatus? status = null,
+        int limit = 20,
+        int offset = 0,
+        CancellationToken cancellationToken = default)
+    {
+        var query = $"/pins?limit={limit}&offset={offset}";
+        if (status.HasValue)
+        {
+            query += $"&status={status.Value.ToString().ToLower()}";
+        }
+        return await GetAsync<List<Pin>>(query, cancellationToken);
+    }
+
+    /// <summary>
+    /// Create a CAR file from entries.
+    /// </summary>
+    public async Task<CarFile> CreateCarAsync(
+        IEnumerable<FileEntry> entries,
+        CancellationToken cancellationToken = default)
+    {
+        var request = entries.Select(e => new
+        {
+            path = e.Path,
+            content = Convert.ToBase64String(e.Content),
+            content_type = e.ContentType
+        }).ToList();
+
+        return await PostAsync<CarFile>("/car/create", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Import a CAR file.
+    /// </summary>
+    public async Task<List<string>> ImportCarAsync(
+        byte[] carData,
+        CancellationToken cancellationToken = default)
+    {
+        using var content = new ByteArrayContent(carData);
+        content.Headers.ContentType = MediaTypeHeaderValue.Parse("application/vnd.ipld.car");
+
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.PostAsync("/car/import", content, cancellationToken);
+            await EnsureSuccessAsync(response);
+            var result = await response.Content.ReadFromJsonAsync<JsonElement>(_jsonOptions, cancellationToken);
+            return result.GetProperty("cids").EnumerateArray()
+                .Select(e => e.GetString()!)
+                .ToList();
+        });
+    }
+
+    /// <summary>
+    /// Export content as a CAR file.
+    /// </summary>
+    public async Task<byte[]> ExportCarAsync(
+        string cid,
+        CancellationToken cancellationToken = default)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.GetAsync($"/car/export/{cid}", cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadAsByteArrayAsync(cancellationToken);
+        });
+    }
+
+    /// <summary>
+    /// List directory contents.
+    /// </summary>
+    public async Task<List<DirectoryEntry>> ListDirectoryAsync(
+        string cid,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<List<DirectoryEntry>>($"/directory/{cid}", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get storage statistics.
+    /// </summary>
+    public async Task<StorageStats> GetStatsAsync(CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<StorageStats>("/stats", cancellationToken);
+    }
+
+    private async Task<T> GetAsync<T>(string path, CancellationToken cancellationToken)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.GetAsync(path, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<T>(_jsonOptions, cancellationToken)
+                ?? throw new StorageException("Invalid response");
+        });
+    }
+
+    private async Task<T> PostAsync<T>(string path, object body, CancellationToken cancellationToken)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.PostAsJsonAsync(path, body, _jsonOptions, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<T>(_jsonOptions, cancellationToken)
+                ?? throw new StorageException("Invalid response");
+        });
+    }
+
+    private async Task EnsureSuccessAsync(HttpResponseMessage response)
+    {
+        if (!response.IsSuccessStatusCode)
+        {
+            var content = await response.Content.ReadAsStringAsync();
+            throw new StorageException(
+                $"HTTP error: {content}",
+                statusCode: (int)response.StatusCode);
+        }
+    }
+
+    private async Task<T> ExecuteWithRetryAsync<T>(Func<Task<T>> operation)
+    {
+        Exception? lastException = null;
+
+        for (int attempt = 0; attempt < _config.Retries; attempt++)
+        {
+            try
+            {
+                return await operation();
+            }
+            catch (Exception ex)
+            {
+                lastException = ex;
+                if (_config.Debug)
+                {
+                    Console.WriteLine($"Attempt {attempt + 1} failed: {ex.Message}");
+                }
+                if (attempt < _config.Retries - 1)
+                {
+                    await Task.Delay(TimeSpan.FromSeconds(attempt + 1));
+                }
+            }
+        }
+
+        throw lastException ?? new StorageException("Unknown error after retries");
+    }
+
+    public void Dispose()
+    {
+        if (!_disposed)
+        {
+            _httpClient.Dispose();
+            _disposed = true;
+        }
+        GC.SuppressFinalize(this);
+    }
+}

sdk/csharp/Synor.Sdk/Storage/Types.cs

@@ -0,0 +1,139 @@
+using System.Text.Json.Serialization;
+
+namespace Synor.Sdk.Storage;
+
+/// <summary>
+/// Storage network.
+/// </summary>
+public enum StorageNetwork
+{
+    [JsonPropertyName("mainnet")] Mainnet,
+    [JsonPropertyName("testnet")] Testnet,
+    [JsonPropertyName("devnet")] Devnet
+}
+
+/// <summary>
+/// Pin status.
+/// </summary>
+public enum PinStatus
+{
+    [JsonPropertyName("queued")] Queued,
+    [JsonPropertyName("pinning")] Pinning,
+    [JsonPropertyName("pinned")] Pinned,
+    [JsonPropertyName("failed")] Failed
+}
+
+/// <summary>
+/// Storage configuration.
+/// </summary>
+public class StorageConfig
+{
+    public required string ApiKey { get; init; }
+    public string Endpoint { get; init; } = "https://storage.synor.io/v1";
+    public string Gateway { get; init; } = "https://gateway.synor.io";
+    public StorageNetwork Network { get; init; } = StorageNetwork.Mainnet;
+    public TimeSpan Timeout { get; init; } = TimeSpan.FromMinutes(5);
+    public int Retries { get; init; } = 3;
+    public bool Debug { get; init; } = false;
+}
+
+/// <summary>
+/// Upload options.
+/// </summary>
+public class UploadOptions
+{
+    public string? Name { get; init; }
+    public string? ContentType { get; init; }
+    public bool Pin { get; init; } = true;
+    public Dictionary<string, string>? Metadata { get; init; }
+    public bool WrapWithDirectory { get; init; } = false;
+}
+
+/// <summary>
+/// Upload response.
+/// </summary>
+public record UploadResponse(
+    [property: JsonPropertyName("cid")] string Cid,
+    [property: JsonPropertyName("size")] long Size,
+    [property: JsonPropertyName("name")] string? Name = null,
+    [property: JsonPropertyName("pinned")] bool Pinned = true
+);
+
+/// <summary>
+/// Pin request.
+/// </summary>
+public class PinRequest
+{
+    public required string Cid { get; init; }
+    public string? Name { get; init; }
+    public Dictionary<string, string>? Metadata { get; init; }
+    public string[]? Origins { get; init; }
+}
+
+/// <summary>
+/// Pin information.
+/// </summary>
+public record Pin(
+    [property: JsonPropertyName("cid")] string Cid,
+    [property: JsonPropertyName("name")] string? Name,
+    [property: JsonPropertyName("status")] PinStatus Status,
+    [property: JsonPropertyName("size")] long Size,
+    [property: JsonPropertyName("created_at")] DateTime CreatedAt,
+    [property: JsonPropertyName("metadata")] Dictionary<string, string>? Metadata = null
+);
+
+/// <summary>
+/// File entry for directory operations.
+/// </summary>
+public class FileEntry
+{
+    public required string Path { get; init; }
+    public required byte[] Content { get; init; }
+    public string? ContentType { get; init; }
+}
+
+/// <summary>
+/// Directory entry.
+/// </summary>
+public record DirectoryEntry(
+    [property: JsonPropertyName("name")] string Name,
+    [property: JsonPropertyName("cid")] string Cid,
+    [property: JsonPropertyName("size")] long Size,
+    [property: JsonPropertyName("type")] string Type
+);
+
+/// <summary>
+/// CAR file.
+/// </summary>
+public record CarFile(
+    [property: JsonPropertyName("root_cid")] string RootCid,
+    [property: JsonPropertyName("data")] byte[] Data,
+    [property: JsonPropertyName("size")] long Size
+);
+
+/// <summary>
+/// Storage statistics.
+/// </summary>
+public record StorageStats(
+    [property: JsonPropertyName("total_size")] long TotalSize,
+    [property: JsonPropertyName("pin_count")] int PinCount,
+    [property: JsonPropertyName("bandwidth_used")] long BandwidthUsed,
+    [property: JsonPropertyName("storage_limit")] long StorageLimit,
+    [property: JsonPropertyName("bandwidth_limit")] long BandwidthLimit
+);
+
+/// <summary>
+/// Storage exception.
+/// </summary>
+public class StorageException : Exception
+{
+    public string? Code { get; }
+    public int? StatusCode { get; }
+
+    public StorageException(string message, string? code = null, int? statusCode = null)
+        : base(message)
+    {
+        Code = code;
+        StatusCode = statusCode;
+    }
+}

sdk/csharp/Synor.Sdk/Synor.Sdk.csproj

@@ -0,0 +1,22 @@
+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net8.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+    <Version>0.1.0</Version>
+    <Authors>Synor</Authors>
+    <Company>Synor</Company>
+    <Description>C# SDK for Synor - Compute, Wallet, RPC, and Storage</Description>
+    <PackageId>Synor.Sdk</PackageId>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <PackageProjectUrl>https://synor.cc</PackageProjectUrl>
+    <RepositoryUrl>https://github.com/synor/synor</RepositoryUrl>
+    <PackageTags>synor;blockchain;wallet;rpc;storage;ipfs</PackageTags>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="System.Text.Json" Version="8.0.0" />
+  </ItemGroup>
+
+</Project>

sdk/csharp/Synor.Sdk/Wallet/SynorWallet.cs

@@ -0,0 +1,256 @@
+using System.Net.Http.Json;
+using System.Text.Json;
+
+namespace Synor.Sdk.Wallet;
+
+/// <summary>
+/// Synor Wallet SDK client for C#.
+///
+/// Provides key management, transaction signing, and balance queries
+/// for the Synor blockchain.
+/// </summary>
+/// <example>
+/// <code>
+/// var wallet = new SynorWallet(new WalletConfig { ApiKey = "your-api-key" });
+///
+/// // Create a new wallet
+/// var result = await wallet.CreateWalletAsync();
+/// Console.WriteLine($"Wallet ID: {result.Wallet.Id}");
+/// Console.WriteLine($"Mnemonic: {result.Mnemonic}");
+///
+/// // Get balance
+/// var balance = await wallet.GetBalanceAsync(result.Wallet.Addresses[0].AddressString);
+/// Console.WriteLine($"Balance: {balance.Total}");
+///
+/// wallet.Dispose();
+/// </code>
+/// </example>
+public class SynorWallet : IDisposable
+{
+    private readonly WalletConfig _config;
+    private readonly HttpClient _httpClient;
+    private readonly JsonSerializerOptions _jsonOptions;
+    private bool _disposed;
+
+    public SynorWallet(WalletConfig config)
+    {
+        _config = config;
+        _httpClient = new HttpClient
+        {
+            BaseAddress = new Uri(config.Endpoint),
+            Timeout = config.Timeout
+        };
+        _httpClient.DefaultRequestHeaders.Add("Authorization", $"Bearer {config.ApiKey}");
+
+        _jsonOptions = new JsonSerializerOptions
+        {
+            PropertyNamingPolicy = JsonNamingPolicy.SnakeCaseLower,
+            PropertyNameCaseInsensitive = true
+        };
+    }
+
+    /// <summary>
+    /// Create a new wallet.
+    /// </summary>
+    public async Task<CreateWalletResult> CreateWalletAsync(
+        WalletType type = WalletType.Standard,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new { type = type.ToString().ToLower(), network = _config.Network.ToString().ToLower() };
+        return await PostAsync<CreateWalletResult>("/wallets", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Import a wallet from mnemonic.
+    /// </summary>
+    public async Task<Wallet> ImportWalletAsync(
+        string mnemonic,
+        string? passphrase = null,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new
+        {
+            mnemonic,
+            passphrase,
+            network = _config.Network.ToString().ToLower()
+        };
+        return await PostAsync<Wallet>("/wallets/import", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Get a wallet by ID.
+    /// </summary>
+    public async Task<Wallet> GetWalletAsync(
+        string walletId,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<Wallet>($"/wallets/{walletId}", cancellationToken);
+    }
+
+    /// <summary>
+    /// Generate a new address for a wallet.
+    /// </summary>
+    public async Task<Address> GenerateAddressAsync(
+        string walletId,
+        bool isChange = false,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new { is_change = isChange };
+        return await PostAsync<Address>($"/wallets/{walletId}/addresses", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Get a stealth address for privacy transactions.
+    /// </summary>
+    public async Task<StealthAddress> GetStealthAddressAsync(
+        string walletId,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<StealthAddress>($"/wallets/{walletId}/stealth-address", cancellationToken);
+    }
+
+    /// <summary>
+    /// Sign a transaction.
+    /// </summary>
+    public async Task<SignedTransaction> SignTransactionAsync(
+        string walletId,
+        Transaction transaction,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new { wallet_id = walletId, transaction };
+        return await PostAsync<SignedTransaction>("/transactions/sign", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Sign a message.
+    /// </summary>
+    public async Task<Signature> SignMessageAsync(
+        string walletId,
+        string message,
+        int addressIndex = 0,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new { wallet_id = walletId, message, address_index = addressIndex };
+        return await PostAsync<Signature>("/messages/sign", request, cancellationToken);
+    }
+
+    /// <summary>
+    /// Verify a message signature.
+    /// </summary>
+    public async Task<bool> VerifyMessageAsync(
+        string message,
+        string signature,
+        string address,
+        CancellationToken cancellationToken = default)
+    {
+        var request = new { message, signature, address };
+        var response = await PostAsync<JsonElement>("/messages/verify", request, cancellationToken);
+        return response.GetProperty("valid").GetBoolean();
+    }
+
+    /// <summary>
+    /// Get balance for an address.
+    /// </summary>
+    public async Task<Balance> GetBalanceAsync(
+        string address,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<Balance>($"/addresses/{address}/balance", cancellationToken);
+    }
+
+    /// <summary>
+    /// Get UTXOs for an address.
+    /// </summary>
+    public async Task<List<UTXO>> GetUTXOsAsync(
+        string address,
+        int minConfirmations = 1,
+        CancellationToken cancellationToken = default)
+    {
+        return await GetAsync<List<UTXO>>(
+            $"/addresses/{address}/utxos?min_confirmations={minConfirmations}",
+            cancellationToken);
+    }
+
+    /// <summary>
+    /// Estimate transaction fee.
+    /// </summary>
+    public async Task<long> EstimateFeeAsync(
+        Priority priority = Priority.Medium,
+        CancellationToken cancellationToken = default)
+    {
+        var response = await GetAsync<JsonElement>(
+            $"/fees/estimate?priority={priority.ToString().ToLower()}",
+            cancellationToken);
+        return response.GetProperty("fee_per_byte").GetInt64();
+    }
+
+    private async Task<T> GetAsync<T>(string path, CancellationToken cancellationToken)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.GetAsync(path, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<T>(_jsonOptions, cancellationToken)
+                ?? throw new WalletException("Invalid response");
+        });
+    }
+
+    private async Task<T> PostAsync<T>(string path, object body, CancellationToken cancellationToken)
+    {
+        return await ExecuteWithRetryAsync(async () =>
+        {
+            var response = await _httpClient.PostAsJsonAsync(path, body, _jsonOptions, cancellationToken);
+            await EnsureSuccessAsync(response);
+            return await response.Content.ReadFromJsonAsync<T>(_jsonOptions, cancellationToken)
+                ?? throw new WalletException("Invalid response");
+        });
+    }
+
+    private async Task EnsureSuccessAsync(HttpResponseMessage response)
+    {
+        if (!response.IsSuccessStatusCode)
+        {
+            var content = await response.Content.ReadAsStringAsync();
+            throw new WalletException(
+                $"HTTP error: {content}",
+                statusCode: (int)response.StatusCode);
+        }
+    }
+
+    private async Task<T> ExecuteWithRetryAsync<T>(Func<Task<T>> operation)
+    {
+        Exception? lastException = null;
+
+        for (int attempt = 0; attempt < _config.Retries; attempt++)
+        {
+            try
+            {
+                return await operation();
+            }
+            catch (Exception ex)
+            {
+                lastException = ex;
+                if (_config.Debug)
+                {
+                    Console.WriteLine($"Attempt {attempt + 1} failed: {ex.Message}");
+                }
+                if (attempt < _config.Retries - 1)
+                {
+                    await Task.Delay(TimeSpan.FromSeconds(attempt + 1));
+                }
+            }
+        }
+
+        throw lastException ?? new WalletException("Unknown error after retries");
+    }
+
+    public void Dispose()
+    {
+        if (!_disposed)
+        {
+            _httpClient.Dispose();
+            _disposed = true;
+        }
+        GC.SuppressFinalize(this);
+    }
+}

sdk/csharp/Synor.Sdk/Wallet/Types.cs

@@ -0,0 +1,167 @@
+using System.Text.Json.Serialization;
+
+namespace Synor.Sdk.Wallet;
+
+/// <summary>
+/// Network environment for wallet operations.
+/// </summary>
+public enum Network
+{
+    [JsonPropertyName("mainnet")] Mainnet,
+    [JsonPropertyName("testnet")] Testnet,
+    [JsonPropertyName("devnet")] Devnet
+}
+
+/// <summary>
+/// Type of wallet to create.
+/// </summary>
+public enum WalletType
+{
+    [JsonPropertyName("standard")] Standard,
+    [JsonPropertyName("multisig")] Multisig,
+    [JsonPropertyName("hardware")] Hardware,
+    [JsonPropertyName("stealth")] Stealth
+}
+
+/// <summary>
+/// Transaction priority for fee estimation.
+/// </summary>
+public enum Priority
+{
+    [JsonPropertyName("low")] Low,
+    [JsonPropertyName("medium")] Medium,
+    [JsonPropertyName("high")] High
+}
+
+/// <summary>
+/// Configuration for the wallet client.
+/// </summary>
+public class WalletConfig
+{
+    public required string ApiKey { get; init; }
+    public string Endpoint { get; init; } = "https://wallet.synor.io/v1";
+    public Network Network { get; init; } = Network.Mainnet;
+    public TimeSpan Timeout { get; init; } = TimeSpan.FromSeconds(30);
+    public int Retries { get; init; } = 3;
+    public bool Debug { get; init; } = false;
+}
+
+/// <summary>
+/// A wallet address.
+/// </summary>
+public record Address(
+    [property: JsonPropertyName("address")] string AddressString,
+    [property: JsonPropertyName("index")] int Index,
+    [property: JsonPropertyName("is_change")] bool IsChange = false
+);
+
+/// <summary>
+/// A Synor wallet with addresses and keys.
+/// </summary>
+public record Wallet(
+    [property: JsonPropertyName("id")] string Id,
+    [property: JsonPropertyName("type")] WalletType Type,
+    [property: JsonPropertyName("network")] Network Network,
+    [property: JsonPropertyName("addresses")] List<Address> Addresses,
+    [property: JsonPropertyName("created_at")] string CreatedAt
+);
+
+/// <summary>
+/// Stealth address for privacy transactions.
+/// </summary>
+public record StealthAddress(
+    [property: JsonPropertyName("spend_public_key")] string SpendPublicKey,
+    [property: JsonPropertyName("view_public_key")] string ViewPublicKey,
+    [property: JsonPropertyName("one_time_address")] string OneTimeAddress
+);
+
+/// <summary>
+/// Result of wallet creation.
+/// </summary>
+public record CreateWalletResult(
+    [property: JsonPropertyName("wallet")] Wallet Wallet,
+    [property: JsonPropertyName("mnemonic")] string? Mnemonic = null
+);
+
+/// <summary>
+/// Transaction input (UTXO reference).
+/// </summary>
+public record TransactionInput(
+    [property: JsonPropertyName("txid")] string Txid,
+    [property: JsonPropertyName("vout")] int Vout,
+    [property: JsonPropertyName("amount")] long Amount
+);
+
+/// <summary>
+/// Transaction output.
+/// </summary>
+public record TransactionOutput(
+    [property: JsonPropertyName("address")] string Address,
+    [property: JsonPropertyName("amount")] long Amount
+);
+
+/// <summary>
+/// Transaction for signing.
+/// </summary>
+public record Transaction(
+    List<TransactionInput> Inputs,
+    List<TransactionOutput> Outputs,
+    long? Fee = null,
+    Priority Priority = Priority.Medium
+);
+
+/// <summary>
+/// Signed transaction ready for broadcast.
+/// </summary>
+public record SignedTransaction(
+    [property: JsonPropertyName("txid")] string Txid,
+    [property: JsonPropertyName("hex")] string Hex,
+    [property: JsonPropertyName("size")] int Size,
+    [property: JsonPropertyName("fee")] long Fee
+);
+
+/// <summary>
+/// Cryptographic signature.
+/// </summary>
+public record Signature(
+    [property: JsonPropertyName("signature")] string SignatureString,
+    [property: JsonPropertyName("address")] string Address,
+    [property: JsonPropertyName("recovery_id")] int? RecoveryId = null
+);
+
+/// <summary>
+/// Unspent transaction output.
+/// </summary>
+public record UTXO(
+    [property: JsonPropertyName("txid")] string Txid,
+    [property: JsonPropertyName("vout")] int Vout,
+    [property: JsonPropertyName("amount")] long Amount,
+    [property: JsonPropertyName("address")] string Address,
+    [property: JsonPropertyName("confirmations")] int Confirmations,
+    [property: JsonPropertyName("script_pubkey")] string? ScriptPubKey = null
+);
+
+/// <summary>
+/// Wallet balance information.
+/// </summary>
+public record Balance(
+    [property: JsonPropertyName("confirmed")] long Confirmed,
+    [property: JsonPropertyName("unconfirmed")] long Unconfirmed,
+    [property: JsonPropertyName("total")] long Total
+);
+
+/// <summary>
+/// Exception thrown by wallet operations.
+/// </summary>
+public class WalletException : Exception
+{
+    public string? Code { get; }
+    public int? StatusCode { get; }
+
+    public WalletException(string message, string? code = null, int? statusCode = null)
+        : base(message)
+    {
+        Code = code;
+        StatusCode = statusCode;
+    }
+}

sdk/flutter/.dart_tool/package_config.json

@@ -404,7 +404,7 @@
       "languageVersion": "3.4"
     },
     {
-      "name": "synor_compute",
+      "name": "synor_sdk",
       "rootUri": "../",
       "packageUri": "lib/",
       "languageVersion": "3.0"

sdk/flutter/lib/src/rpc/synor_rpc.dart

@@ -0,0 +1,335 @@
+/// Synor RPC SDK client for Flutter/Dart.
+library synor_rpc;
+
+import 'dart:async';
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+import 'package:web_socket_channel/web_socket_channel.dart';
+import 'types.dart';
+
+export 'types.dart';
+
+/// Synor RPC SDK client for Flutter/Dart.
+///
+/// Provides blockchain queries, transaction submission, and real-time
+/// subscriptions via WebSocket.
+///
+/// Example:
+/// ```dart
+/// final rpc = SynorRpc(RpcConfig(apiKey: 'your-api-key'));
+///
+/// // Get latest block
+/// final block = await rpc.getLatestBlock();
+/// print('Latest block: ${block.height}');
+///
+/// // Subscribe to new blocks
+/// final subscription = rpc.subscribeBlocks((block) {
+///   print('New block: ${block.height}');
+/// });
+///
+/// // Later: cancel subscription
+/// subscription.cancel();
+/// rpc.close();
+/// ```
+class SynorRpc {
+  final RpcConfig config;
+  final http.Client _client;
+  WebSocketChannel? _wsChannel;
+  StreamSubscription? _wsSubscription;
+  final Map<String, void Function(String)> _subscriptions = {};
+
+  SynorRpc(this.config) : _client = http.Client();
+
+  // Block operations
+
+  /// Get the latest block.
+  Future<Block> getLatestBlock() async {
+    return _get('/blocks/latest', Block.fromJson);
+  }
+
+  /// Get a block by hash or height.
+  Future<Block> getBlock(String hashOrHeight) async {
+    return _get('/blocks/$hashOrHeight', Block.fromJson);
+  }
+
+  /// Get a block header by hash or height.
+  Future<BlockHeader> getBlockHeader(String hashOrHeight) async {
+    return _get('/blocks/$hashOrHeight/header', BlockHeader.fromJson);
+  }
+
+  /// Get blocks in a range.
+  Future<List<Block>> getBlocks(int startHeight, int endHeight) async {
+    return _getList(
+      '/blocks?start=$startHeight&end=$endHeight',
+      Block.fromJson,
+    );
+  }
+
+  // Transaction operations
+
+  /// Get a transaction by ID.
+  Future<RpcTransaction> getTransaction(String txid) async {
+    return _get('/transactions/$txid', RpcTransaction.fromJson);
+  }
+
+  /// Get raw transaction hex.
+  Future<String> getRawTransaction(String txid) async {
+    final response = await _get<Map<String, dynamic>>(
+      '/transactions/$txid/raw',
+      (json) => json,
+    );
+    return response['hex'] as String;
+  }
+
+  /// Send a raw transaction.
+  Future<SubmitResult> sendRawTransaction(String hex) async {
+    return _post('/transactions/send', {'hex': hex}, SubmitResult.fromJson);
+  }
+
+  /// Decode a raw transaction without broadcasting.
+  Future<RpcTransaction> decodeRawTransaction(String hex) async {
+    return _post('/transactions/decode', {'hex': hex}, RpcTransaction.fromJson);
+  }
+
+  /// Get transactions for an address.
+  Future<List<RpcTransaction>> getAddressTransactions(
+    String address, {
+    int limit = 50,
+    int offset = 0,
+  }) async {
+    return _getList(
+      '/addresses/$address/transactions?limit=$limit&offset=$offset',
+      RpcTransaction.fromJson,
+    );
+  }
+
+  // Fee estimation
+
+  /// Estimate fee for a given priority.
+  Future<FeeEstimate> estimateFee({RpcPriority priority = RpcPriority.medium}) async {
+    return _get(
+      '/fees/estimate?priority=${priority.toJson()}',
+      FeeEstimate.fromJson,
+    );
+  }
+
+  /// Get all fee estimates.
+  Future<Map<RpcPriority, FeeEstimate>> getAllFeeEstimates() async {
+    final estimates = await _getList('/fees/estimates', FeeEstimate.fromJson);
+    return {for (var e in estimates) e.priority: e};
+  }
+
+  // Chain information
+
+  /// Get chain information.
+  Future<ChainInfo> getChainInfo() async {
+    return _get('/chain/info', ChainInfo.fromJson);
+  }
+
+  /// Get mempool information.
+  Future<MempoolInfo> getMempoolInfo() async {
+    return _get('/mempool/info', MempoolInfo.fromJson);
+  }
+
+  /// Get mempool transactions.
+  Future<List<String>> getMempoolTransactions({int limit = 100}) async {
+    return _getList('/mempool/transactions?limit=$limit', (json) => json['txid'] as String);
+  }
+
+  // WebSocket subscriptions
+
+  /// Subscribe to new blocks.
+  Subscription subscribeBlocks(void Function(Block) callback) {
+    return _subscribe('blocks', null, (data) {
+      final block = Block.fromJson(jsonDecode(data) as Map<String, dynamic>);
+      callback(block);
+    });
+  }
+
+  /// Subscribe to transactions for a specific address.
+  Subscription subscribeAddress(String address, void Function(RpcTransaction) callback) {
+    return _subscribe('address', address, (data) {
+      final tx = RpcTransaction.fromJson(jsonDecode(data) as Map<String, dynamic>);
+      callback(tx);
+    });
+  }
+
+  /// Subscribe to mempool transactions.
+  Subscription subscribeMempool(void Function(RpcTransaction) callback) {
+    return _subscribe('mempool', null, (data) {
+      final tx = RpcTransaction.fromJson(jsonDecode(data) as Map<String, dynamic>);
+      callback(tx);
+    });
+  }
+
+  Subscription _subscribe(
+    String channel,
+    String? filter,
+    void Function(String) callback,
+  ) {
+    _ensureWebSocketConnection();
+
+    final subscriptionId = DateTime.now().millisecondsSinceEpoch.toString();
+    _subscriptions[subscriptionId] = callback;
+
+    final message = jsonEncode({
+      'type': 'subscribe',
+      'channel': channel,
+      'filter': filter,
+    });
+    _wsChannel?.sink.add(message);
+
+    return Subscription(
+      id: subscriptionId,
+      channel: channel,
+      onCancel: () {
+        _subscriptions.remove(subscriptionId);
+        final unsubMessage = jsonEncode({
+          'type': 'unsubscribe',
+          'channel': channel,
+        });
+        _wsChannel?.sink.add(unsubMessage);
+      },
+    );
+  }
+
+  void _ensureWebSocketConnection() {
+    if (_wsChannel != null) return;
+
+    final uri = Uri.parse('${config.wsEndpoint}?token=${config.apiKey}');
+    _wsChannel = WebSocketChannel.connect(uri);
+
+    _wsSubscription = _wsChannel!.stream.listen(
+      (message) {
+        try {
+          final data = jsonDecode(message as String) as Map<String, dynamic>;
+          if (data['type'] == 'data' && data['data'] != null) {
+            final messageData = data['data'] as String;
+            for (final callback in _subscriptions.values) {
+              callback(messageData);
+            }
+          }
+        } catch (e) {
+          if (config.debug) {
+            print('Failed to parse WS message: $e');
+          }
+        }
+      },
+      onError: (error) {
+        if (config.debug) {
+          print('WebSocket error: $error');
+        }
+      },
+      onDone: () {
+        _wsChannel = null;
+        _wsSubscription = null;
+      },
+    );
+  }
+
+  // HTTP helper methods
+
+  Future<T> _get<T>(String path, T Function(Map<String, dynamic>) fromJson) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+          )
+          .timeout(config.timeout);
+
+      return _handleResponse(response, fromJson);
+    });
+  }
+
+  Future<List<T>> _getList<T>(
+    String path,
+    T Function(Map<String, dynamic>) fromJson,
+  ) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+          )
+          .timeout(config.timeout);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        final List<dynamic> jsonList = jsonDecode(response.body);
+        return jsonList
+            .map((e) => fromJson(e as Map<String, dynamic>))
+            .toList();
+      }
+
+      throw RpcException(
+        'HTTP error: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  Future<T> _post<T>(
+    String path,
+    Map<String, dynamic> body,
+    T Function(Map<String, dynamic>) fromJson,
+  ) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .post(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+            body: jsonEncode(body),
+          )
+          .timeout(config.timeout);
+
+      return _handleResponse(response, fromJson);
+    });
+  }
+
+  Map<String, String> get _headers => {
+        'Authorization': 'Bearer ${config.apiKey}',
+        'Content-Type': 'application/json',
+      };
+
+  T _handleResponse<T>(
+    http.Response response,
+    T Function(Map<String, dynamic>) fromJson,
+  ) {
+    if (response.statusCode >= 200 && response.statusCode < 300) {
+      final json = jsonDecode(response.body) as Map<String, dynamic>;
+      return fromJson(json);
+    }
+
+    throw RpcException(
+      'HTTP error: ${response.body}',
+      statusCode: response.statusCode,
+    );
+  }
+
+  Future<T> _executeWithRetry<T>(Future<T> Function() operation) async {
+    Exception? lastError;
+
+    for (var attempt = 0; attempt < config.retries; attempt++) {
+      try {
+        return await operation();
+      } catch (e) {
+        lastError = e as Exception;
+        if (config.debug) {
+          print('Attempt ${attempt + 1} failed: $e');
+        }
+        if (attempt < config.retries - 1) {
+          await Future.delayed(Duration(seconds: attempt + 1));
+        }
+      }
+    }
+
+    throw lastError ?? RpcException('Unknown error after ${config.retries} retries');
+  }
+
+  /// Close the client and release resources.
+  void close() {
+    _wsSubscription?.cancel();
+    _wsChannel?.sink.close();
+    _client.close();
+  }
+}

sdk/flutter/lib/src/rpc/types.dart

@@ -0,0 +1,424 @@
+/// Types for Synor RPC SDK.
+library synor_rpc_types;
+
+/// Network environment.
+enum RpcNetwork {
+  mainnet,
+  testnet,
+  devnet;
+
+  String toJson() => name;
+
+  static RpcNetwork fromJson(String json) {
+    return RpcNetwork.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => RpcNetwork.mainnet,
+    );
+  }
+}
+
+/// Transaction priority for fee estimation.
+enum RpcPriority {
+  low,
+  medium,
+  high;
+
+  String toJson() => name;
+
+  static RpcPriority fromJson(String json) {
+    return RpcPriority.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => RpcPriority.medium,
+    );
+  }
+}
+
+/// Transaction status.
+enum TransactionStatus {
+  pending,
+  confirmed,
+  failed;
+
+  String toJson() => name;
+
+  static TransactionStatus fromJson(String json) {
+    return TransactionStatus.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => TransactionStatus.pending,
+    );
+  }
+}
+
+/// Configuration for the RPC client.
+class RpcConfig {
+  final String apiKey;
+  final String endpoint;
+  final String wsEndpoint;
+  final RpcNetwork network;
+  final Duration timeout;
+  final int retries;
+  final bool debug;
+
+  const RpcConfig({
+    required this.apiKey,
+    this.endpoint = 'https://rpc.synor.io/v1',
+    this.wsEndpoint = 'wss://rpc.synor.io/v1/ws',
+    this.network = RpcNetwork.mainnet,
+    this.timeout = const Duration(seconds: 30),
+    this.retries = 3,
+    this.debug = false,
+  });
+}
+
+/// Block header information.
+class BlockHeader {
+  final String hash;
+  final int height;
+  final String previousHash;
+  final int timestamp;
+  final int version;
+  final String merkleRoot;
+  final int nonce;
+  final double difficulty;
+
+  const BlockHeader({
+    required this.hash,
+    required this.height,
+    required this.previousHash,
+    required this.timestamp,
+    required this.version,
+    required this.merkleRoot,
+    required this.nonce,
+    required this.difficulty,
+  });
+
+  factory BlockHeader.fromJson(Map<String, dynamic> json) {
+    return BlockHeader(
+      hash: json['hash'] as String,
+      height: json['height'] as int,
+      previousHash: json['previous_hash'] as String,
+      timestamp: json['timestamp'] as int,
+      version: json['version'] as int,
+      merkleRoot: json['merkle_root'] as String,
+      nonce: json['nonce'] as int,
+      difficulty: (json['difficulty'] as num).toDouble(),
+    );
+  }
+}
+
+/// A blockchain block.
+class Block {
+  final String hash;
+  final int height;
+  final String previousHash;
+  final int timestamp;
+  final int version;
+  final String merkleRoot;
+  final int nonce;
+  final double difficulty;
+  final List<RpcTransaction> transactions;
+  final int size;
+  final int weight;
+
+  const Block({
+    required this.hash,
+    required this.height,
+    required this.previousHash,
+    required this.timestamp,
+    required this.version,
+    required this.merkleRoot,
+    required this.nonce,
+    required this.difficulty,
+    required this.transactions,
+    required this.size,
+    required this.weight,
+  });
+
+  factory Block.fromJson(Map<String, dynamic> json) {
+    return Block(
+      hash: json['hash'] as String,
+      height: json['height'] as int,
+      previousHash: json['previous_hash'] as String,
+      timestamp: json['timestamp'] as int,
+      version: json['version'] as int,
+      merkleRoot: json['merkle_root'] as String,
+      nonce: json['nonce'] as int,
+      difficulty: (json['difficulty'] as num).toDouble(),
+      transactions: (json['transactions'] as List)
+          .map((e) => RpcTransaction.fromJson(e as Map<String, dynamic>))
+          .toList(),
+      size: json['size'] as int,
+      weight: json['weight'] as int,
+    );
+  }
+}
+
+/// A blockchain transaction.
+class RpcTransaction {
+  final String txid;
+  final String hash;
+  final int version;
+  final int size;
+  final int weight;
+  final int lockTime;
+  final List<RpcTransactionInput> inputs;
+  final List<RpcTransactionOutput> outputs;
+  final int fee;
+  final int confirmations;
+  final String? blockHash;
+  final int? blockHeight;
+  final int? timestamp;
+  final TransactionStatus status;
+
+  const RpcTransaction({
+    required this.txid,
+    required this.hash,
+    required this.version,
+    required this.size,
+    required this.weight,
+    required this.lockTime,
+    required this.inputs,
+    required this.outputs,
+    required this.fee,
+    required this.confirmations,
+    this.blockHash,
+    this.blockHeight,
+    this.timestamp,
+    this.status = TransactionStatus.pending,
+  });
+
+  factory RpcTransaction.fromJson(Map<String, dynamic> json) {
+    return RpcTransaction(
+      txid: json['txid'] as String,
+      hash: json['hash'] as String,
+      version: json['version'] as int,
+      size: json['size'] as int,
+      weight: json['weight'] as int,
+      lockTime: json['lock_time'] as int,
+      inputs: (json['inputs'] as List)
+          .map((e) => RpcTransactionInput.fromJson(e as Map<String, dynamic>))
+          .toList(),
+      outputs: (json['outputs'] as List)
+          .map((e) => RpcTransactionOutput.fromJson(e as Map<String, dynamic>))
+          .toList(),
+      fee: json['fee'] as int,
+      confirmations: json['confirmations'] as int,
+      blockHash: json['block_hash'] as String?,
+      blockHeight: json['block_height'] as int?,
+      timestamp: json['timestamp'] as int?,
+      status: TransactionStatus.fromJson(json['status'] as String? ?? 'pending'),
+    );
+  }
+}
+
+/// Transaction input.
+class RpcTransactionInput {
+  final String txid;
+  final int vout;
+  final String? scriptSig;
+  final int sequence;
+  final List<String>? witness;
+
+  const RpcTransactionInput({
+    required this.txid,
+    required this.vout,
+    this.scriptSig,
+    required this.sequence,
+    this.witness,
+  });
+
+  factory RpcTransactionInput.fromJson(Map<String, dynamic> json) {
+    return RpcTransactionInput(
+      txid: json['txid'] as String,
+      vout: json['vout'] as int,
+      scriptSig: json['script_sig'] as String?,
+      sequence: json['sequence'] as int,
+      witness: (json['witness'] as List?)?.cast<String>(),
+    );
+  }
+}
+
+/// Transaction output.
+class RpcTransactionOutput {
+  final int value;
+  final int n;
+  final ScriptPubKey scriptPubKey;
+
+  const RpcTransactionOutput({
+    required this.value,
+    required this.n,
+    required this.scriptPubKey,
+  });
+
+  factory RpcTransactionOutput.fromJson(Map<String, dynamic> json) {
+    return RpcTransactionOutput(
+      value: json['value'] as int,
+      n: json['n'] as int,
+      scriptPubKey:
+          ScriptPubKey.fromJson(json['script_pubkey'] as Map<String, dynamic>),
+    );
+  }
+}
+
+/// Script public key.
+class ScriptPubKey {
+  final String asm;
+  final String hex;
+  final String type;
+  final String? address;
+
+  const ScriptPubKey({
+    required this.asm,
+    required this.hex,
+    required this.type,
+    this.address,
+  });
+
+  factory ScriptPubKey.fromJson(Map<String, dynamic> json) {
+    return ScriptPubKey(
+      asm: json['asm'] as String,
+      hex: json['hex'] as String,
+      type: json['type'] as String,
+      address: json['address'] as String?,
+    );
+  }
+}
+
+/// Chain information.
+class ChainInfo {
+  final String chain;
+  final int blocks;
+  final int headers;
+  final String bestBlockHash;
+  final double difficulty;
+  final int medianTime;
+  final double verificationProgress;
+  final String chainWork;
+  final bool pruned;
+
+  const ChainInfo({
+    required this.chain,
+    required this.blocks,
+    required this.headers,
+    required this.bestBlockHash,
+    required this.difficulty,
+    required this.medianTime,
+    required this.verificationProgress,
+    required this.chainWork,
+    required this.pruned,
+  });
+
+  factory ChainInfo.fromJson(Map<String, dynamic> json) {
+    return ChainInfo(
+      chain: json['chain'] as String,
+      blocks: json['blocks'] as int,
+      headers: json['headers'] as int,
+      bestBlockHash: json['best_block_hash'] as String,
+      difficulty: (json['difficulty'] as num).toDouble(),
+      medianTime: json['median_time'] as int,
+      verificationProgress: (json['verification_progress'] as num).toDouble(),
+      chainWork: json['chain_work'] as String,
+      pruned: json['pruned'] as bool,
+    );
+  }
+}
+
+/// Mempool information.
+class MempoolInfo {
+  final int size;
+  final int bytes;
+  final int usage;
+  final int maxMempool;
+  final double mempoolMinFee;
+  final double minRelayTxFee;
+
+  const MempoolInfo({
+    required this.size,
+    required this.bytes,
+    required this.usage,
+    required this.maxMempool,
+    required this.mempoolMinFee,
+    required this.minRelayTxFee,
+  });
+
+  factory MempoolInfo.fromJson(Map<String, dynamic> json) {
+    return MempoolInfo(
+      size: json['size'] as int,
+      bytes: json['bytes'] as int,
+      usage: json['usage'] as int,
+      maxMempool: json['max_mempool'] as int,
+      mempoolMinFee: (json['mempool_min_fee'] as num).toDouble(),
+      minRelayTxFee: (json['min_relay_tx_fee'] as num).toDouble(),
+    );
+  }
+}
+
+/// Fee estimate for transactions.
+class FeeEstimate {
+  final RpcPriority priority;
+  final int feeRate;
+  final int estimatedBlocks;
+
+  const FeeEstimate({
+    required this.priority,
+    required this.feeRate,
+    required this.estimatedBlocks,
+  });
+
+  factory FeeEstimate.fromJson(Map<String, dynamic> json) {
+    return FeeEstimate(
+      priority: RpcPriority.fromJson(json['priority'] as String),
+      feeRate: json['fee_rate'] as int,
+      estimatedBlocks: json['estimated_blocks'] as int,
+    );
+  }
+}
+
+/// Result of transaction submission.
+class SubmitResult {
+  final String txid;
+  final bool accepted;
+  final String? reason;
+
+  const SubmitResult({
+    required this.txid,
+    required this.accepted,
+    this.reason,
+  });
+
+  factory SubmitResult.fromJson(Map<String, dynamic> json) {
+    return SubmitResult(
+      txid: json['txid'] as String,
+      accepted: json['accepted'] as bool,
+      reason: json['reason'] as String?,
+    );
+  }
+}
+
+/// Subscription handle for WebSocket events.
+class Subscription {
+  final String id;
+  final String channel;
+  final void Function() _onCancel;
+
+  Subscription({
+    required this.id,
+    required this.channel,
+    required void Function() onCancel,
+  }) : _onCancel = onCancel;
+
+  /// Cancel the subscription.
+  void cancel() => _onCancel();
+}
+
+/// Exception thrown by RPC operations.
+class RpcException implements Exception {
+  final String message;
+  final String? code;
+  final int? statusCode;
+
+  const RpcException(this.message, {this.code, this.statusCode});
+
+  @override
+  String toString() => 'RpcException: $message';
+}

sdk/flutter/lib/src/storage/synor_storage.dart

@@ -0,0 +1,436 @@
+/// Synor Storage SDK client for Flutter/Dart.
+library synor_storage;
+
+import 'dart:async';
+import 'dart:convert';
+import 'dart:typed_data';
+import 'package:http/http.dart' as http;
+import 'types.dart';
+
+export 'types.dart';
+
+/// Synor Storage SDK client for Flutter/Dart.
+///
+/// Provides IPFS-compatible decentralized storage with upload, download,
+/// pinning, and CAR file operations.
+///
+/// Example:
+/// ```dart
+/// final storage = SynorStorage(StorageConfig(apiKey: 'your-api-key'));
+///
+/// // Upload a file
+/// final data = utf8.encode('Hello, World!');
+/// final result = await storage.upload(
+///   Uint8List.fromList(data),
+///   options: UploadOptions(name: 'hello.txt'),
+/// );
+/// print('CID: ${result.cid}');
+///
+/// // Download content
+/// final content = await storage.download(result.cid);
+/// print('Content: ${utf8.decode(content)}');
+///
+/// // Pin content
+/// final pin = await storage.pin(PinRequest(cid: result.cid, durationDays: 30));
+/// print('Pin status: ${pin.status}');
+///
+/// storage.close();
+/// ```
+class SynorStorage {
+  final StorageConfig config;
+  final http.Client _client;
+
+  SynorStorage(this.config) : _client = http.Client();
+
+  // Upload operations
+
+  /// Upload data to storage.
+  Future<UploadResponse> upload(
+    Uint8List data, {
+    UploadOptions options = const UploadOptions(),
+  }) async {
+    return _executeWithRetry(() async {
+      final request = http.MultipartRequest(
+        'POST',
+        Uri.parse('${config.endpoint}/upload'),
+      );
+
+      request.headers['Authorization'] = 'Bearer ${config.apiKey}';
+
+      request.files.add(http.MultipartFile.fromBytes(
+        'file',
+        data,
+        filename: options.name ?? 'file',
+      ));
+
+      if (options.name != null) {
+        request.fields['name'] = options.name!;
+      }
+      request.fields['wrap_with_directory'] = options.wrapWithDirectory.toString();
+      request.fields['hash_algorithm'] = options.hashAlgorithm.toJson();
+      if (options.chunkSize != null) {
+        request.fields['chunk_size'] = options.chunkSize.toString();
+      }
+      if (options.pinDurationDays != null) {
+        request.fields['pin_duration_days'] = options.pinDurationDays.toString();
+      }
+
+      final streamedResponse = await request.send().timeout(config.timeout);
+      final response = await http.Response.fromStream(streamedResponse);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        final json = jsonDecode(response.body) as Map<String, dynamic>;
+        return UploadResponse.fromJson(json);
+      }
+
+      throw StorageException(
+        'Upload failed: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  /// Upload multiple files as a directory.
+  Future<UploadResponse> uploadDirectory(
+    List<FileEntry> files, {
+    String? dirName,
+  }) async {
+    return _executeWithRetry(() async {
+      final request = http.MultipartRequest(
+        'POST',
+        Uri.parse('${config.endpoint}/upload/directory'),
+      );
+
+      request.headers['Authorization'] = 'Bearer ${config.apiKey}';
+
+      for (final file in files) {
+        request.files.add(http.MultipartFile.fromBytes(
+          'files',
+          file.content,
+          filename: file.path,
+        ));
+      }
+
+      if (dirName != null) {
+        request.fields['name'] = dirName;
+      }
+
+      final streamedResponse = await request.send().timeout(config.timeout);
+      final response = await http.Response.fromStream(streamedResponse);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        final json = jsonDecode(response.body) as Map<String, dynamic>;
+        return UploadResponse.fromJson(json);
+      }
+
+      throw StorageException(
+        'Directory upload failed: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  // Download operations
+
+  /// Download content by CID.
+  Future<Uint8List> download(String cid) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}/content/$cid'),
+            headers: {'Authorization': 'Bearer ${config.apiKey}'},
+          )
+          .timeout(config.timeout);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        return response.bodyBytes;
+      }
+
+      throw StorageException(
+        'Download failed: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  /// Download content as a stream.
+  Stream<List<int>> downloadStream(String cid) async* {
+    final request = http.Request(
+      'GET',
+      Uri.parse('${config.endpoint}/content/$cid'),
+    );
+    request.headers['Authorization'] = 'Bearer ${config.apiKey}';
+
+    final response = await _client.send(request);
+
+    if (response.statusCode < 200 || response.statusCode >= 300) {
+      throw StorageException(
+        'Download failed',
+        statusCode: response.statusCode,
+      );
+    }
+
+    yield* response.stream;
+  }
+
+  /// Get the gateway URL for content.
+  String getGatewayUrl(String cid, {String? path}) {
+    if (path != null) {
+      return '${config.gateway}/ipfs/$cid/$path';
+    }
+    return '${config.gateway}/ipfs/$cid';
+  }
+
+  // Pinning operations
+
+  /// Pin content to ensure availability.
+  Future<Pin> pin(PinRequest request) async {
+    return _post('/pins', request.toJson(), Pin.fromJson);
+  }
+
+  /// Unpin content.
+  Future<void> unpin(String cid) async {
+    await _delete('/pins/$cid');
+  }
+
+  /// Get pin status.
+  Future<Pin> getPinStatus(String cid) async {
+    return _get('/pins/$cid', Pin.fromJson);
+  }
+
+  /// List all pins.
+  Future<List<Pin>> listPins({
+    PinStatus? status,
+    int limit = 50,
+    int offset = 0,
+  }) async {
+    var path = '/pins?limit=$limit&offset=$offset';
+    if (status != null) {
+      path += '&status=${status.toJson()}';
+    }
+    return _getList(path, Pin.fromJson);
+  }
+
+  // CAR file operations
+
+  /// Create a CAR file from entries.
+  Future<CarFile> createCar(List<CarEntry> entries) async {
+    return _executeWithRetry(() async {
+      final request = http.MultipartRequest(
+        'POST',
+        Uri.parse('${config.endpoint}/car'),
+      );
+
+      request.headers['Authorization'] = 'Bearer ${config.apiKey}';
+
+      for (final entry in entries) {
+        request.files.add(http.MultipartFile.fromBytes(
+          'files',
+          entry.content,
+          filename: entry.path,
+        ));
+      }
+
+      final streamedResponse = await request.send().timeout(config.timeout);
+      final response = await http.Response.fromStream(streamedResponse);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        final json = jsonDecode(response.body) as Map<String, dynamic>;
+        return CarFile.fromJson(json);
+      }
+
+      throw StorageException(
+        'CAR creation failed: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  /// Import a CAR file.
+  Future<List<String>> importCar(Uint8List carData) async {
+    return _executeWithRetry(() async {
+      final request = http.MultipartRequest(
+        'POST',
+        Uri.parse('${config.endpoint}/car/import'),
+      );
+
+      request.headers['Authorization'] = 'Bearer ${config.apiKey}';
+
+      request.files.add(http.MultipartFile.fromBytes(
+        'file',
+        carData,
+        filename: 'archive.car',
+      ));
+
+      final streamedResponse = await request.send().timeout(config.timeout);
+      final response = await http.Response.fromStream(streamedResponse);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        final json = jsonDecode(response.body) as Map<String, dynamic>;
+        return (json['cids'] as List).cast<String>();
+      }
+
+      throw StorageException(
+        'CAR import failed: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  /// Export content as a CAR file.
+  Future<Uint8List> exportCar(String cid) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}/car/$cid'),
+            headers: {'Authorization': 'Bearer ${config.apiKey}'},
+          )
+          .timeout(config.timeout);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        return response.bodyBytes;
+      }
+
+      throw StorageException(
+        'CAR export failed: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  // Directory operations
+
+  /// List directory contents.
+  Future<List<DirectoryEntry>> listDirectory(String cid) async {
+    return _getList('/content/$cid/ls', DirectoryEntry.fromJson);
+  }
+
+  // Statistics
+
+  /// Get storage statistics.
+  Future<StorageStats> getStats() async {
+    return _get('/stats', StorageStats.fromJson);
+  }
+
+  // HTTP helper methods
+
+  Future<T> _get<T>(String path, T Function(Map<String, dynamic>) fromJson) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+          )
+          .timeout(config.timeout);
+
+      return _handleResponse(response, fromJson);
+    });
+  }
+
+  Future<List<T>> _getList<T>(
+    String path,
+    T Function(Map<String, dynamic>) fromJson,
+  ) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+          )
+          .timeout(config.timeout);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        final List<dynamic> jsonList = jsonDecode(response.body);
+        return jsonList
+            .map((e) => fromJson(e as Map<String, dynamic>))
+            .toList();
+      }
+
+      throw StorageException(
+        'HTTP error: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  Future<T> _post<T>(
+    String path,
+    Map<String, dynamic> body,
+    T Function(Map<String, dynamic>) fromJson,
+  ) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .post(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+            body: jsonEncode(body),
+          )
+          .timeout(config.timeout);
+
+      return _handleResponse(response, fromJson);
+    });
+  }
+
+  Future<void> _delete(String path) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .delete(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+          )
+          .timeout(config.timeout);
+
+      if (response.statusCode < 200 || response.statusCode >= 300) {
+        throw StorageException(
+          'Delete failed: ${response.body}',
+          statusCode: response.statusCode,
+        );
+      }
+    });
+  }
+
+  Map<String, String> get _headers => {
+        'Authorization': 'Bearer ${config.apiKey}',
+        'Content-Type': 'application/json',
+      };
+
+  T _handleResponse<T>(
+    http.Response response,
+    T Function(Map<String, dynamic>) fromJson,
+  ) {
+    if (response.statusCode >= 200 && response.statusCode < 300) {
+      final json = jsonDecode(response.body) as Map<String, dynamic>;
+      return fromJson(json);
+    }
+
+    throw StorageException(
+      'HTTP error: ${response.body}',
+      statusCode: response.statusCode,
+    );
+  }
+
+  Future<T> _executeWithRetry<T>(Future<T> Function() operation) async {
+    Exception? lastError;
+
+    for (var attempt = 0; attempt < config.retries; attempt++) {
+      try {
+        return await operation();
+      } catch (e) {
+        lastError = e as Exception;
+        if (config.debug) {
+          print('Attempt ${attempt + 1} failed: $e');
+        }
+        if (attempt < config.retries - 1) {
+          await Future.delayed(Duration(seconds: attempt + 1));
+        }
+      }
+    }
+
+    throw lastError ?? StorageException('Unknown error after ${config.retries} retries');
+  }
+
+  /// Close the client and release resources.
+  void close() {
+    _client.close();
+  }
+}

sdk/flutter/lib/src/storage/types.dart

@@ -0,0 +1,279 @@
+/// Types for Synor Storage SDK.
+library synor_storage_types;
+
+import 'dart:typed_data';
+
+/// Status of a pinned item.
+enum PinStatus {
+  queued,
+  pinning,
+  pinned,
+  failed,
+  unpinned;
+
+  String toJson() => name;
+
+  static PinStatus fromJson(String json) {
+    return PinStatus.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => PinStatus.queued,
+    );
+  }
+}
+
+/// Hash algorithm for content addressing.
+enum HashAlgorithm {
+  sha2_256('sha2-256'),
+  blake3('blake3');
+
+  final String value;
+  const HashAlgorithm(this.value);
+
+  String toJson() => value;
+
+  static HashAlgorithm fromJson(String json) {
+    return HashAlgorithm.values.firstWhere(
+      (e) => e.value == json,
+      orElse: () => HashAlgorithm.sha2_256,
+    );
+  }
+}
+
+/// Type of directory entry.
+enum EntryType {
+  file,
+  directory;
+
+  String toJson() => name;
+
+  static EntryType fromJson(String json) {
+    return EntryType.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => EntryType.file,
+    );
+  }
+}
+
+/// Configuration for the storage client.
+class StorageConfig {
+  final String apiKey;
+  final String endpoint;
+  final String gateway;
+  final Duration timeout;
+  final int retries;
+  final bool debug;
+
+  const StorageConfig({
+    required this.apiKey,
+    this.endpoint = 'https://storage.synor.io/v1',
+    this.gateway = 'https://gateway.synor.io',
+    this.timeout = const Duration(seconds: 60),
+    this.retries = 3,
+    this.debug = false,
+  });
+}
+
+/// Options for file upload.
+class UploadOptions {
+  final String? name;
+  final bool wrapWithDirectory;
+  final HashAlgorithm hashAlgorithm;
+  final int? chunkSize;
+  final int? pinDurationDays;
+
+  const UploadOptions({
+    this.name,
+    this.wrapWithDirectory = false,
+    this.hashAlgorithm = HashAlgorithm.sha2_256,
+    this.chunkSize,
+    this.pinDurationDays,
+  });
+}
+
+/// Response from upload operation.
+class UploadResponse {
+  final String cid;
+  final int size;
+  final String? name;
+  final String createdAt;
+
+  const UploadResponse({
+    required this.cid,
+    required this.size,
+    this.name,
+    required this.createdAt,
+  });
+
+  factory UploadResponse.fromJson(Map<String, dynamic> json) {
+    return UploadResponse(
+      cid: json['cid'] as String,
+      size: json['size'] as int,
+      name: json['name'] as String?,
+      createdAt: json['created_at'] as String,
+    );
+  }
+}
+
+/// Pin information.
+class Pin {
+  final String cid;
+  final String? name;
+  final PinStatus status;
+  final int size;
+  final String createdAt;
+  final String? expiresAt;
+  final List<String>? delegates;
+
+  const Pin({
+    required this.cid,
+    this.name,
+    required this.status,
+    required this.size,
+    required this.createdAt,
+    this.expiresAt,
+    this.delegates,
+  });
+
+  factory Pin.fromJson(Map<String, dynamic> json) {
+    return Pin(
+      cid: json['cid'] as String,
+      name: json['name'] as String?,
+      status: PinStatus.fromJson(json['status'] as String),
+      size: json['size'] as int,
+      createdAt: json['created_at'] as String,
+      expiresAt: json['expires_at'] as String?,
+      delegates: (json['delegates'] as List?)?.cast<String>(),
+    );
+  }
+}
+
+/// Request to pin content.
+class PinRequest {
+  final String cid;
+  final String? name;
+  final int? durationDays;
+  final List<String>? origins;
+  final Map<String, String>? meta;
+
+  const PinRequest({
+    required this.cid,
+    this.name,
+    this.durationDays,
+    this.origins,
+    this.meta,
+  });
+
+  Map<String, dynamic> toJson() => {
+        'cid': cid,
+        if (name != null) 'name': name,
+        if (durationDays != null) 'duration_days': durationDays,
+        if (origins != null) 'origins': origins,
+        if (meta != null) 'meta': meta,
+      };
+}
+
+/// CAR (Content Addressable Archive) file.
+class CarFile {
+  final String cid;
+  final int size;
+  final List<String> roots;
+  final String createdAt;
+
+  const CarFile({
+    required this.cid,
+    required this.size,
+    required this.roots,
+    required this.createdAt,
+  });
+
+  factory CarFile.fromJson(Map<String, dynamic> json) {
+    return CarFile(
+      cid: json['cid'] as String,
+      size: json['size'] as int,
+      roots: (json['roots'] as List).cast<String>(),
+      createdAt: json['created_at'] as String,
+    );
+  }
+}
+
+/// Entry in a CAR file for creation.
+class CarEntry {
+  final String path;
+  final Uint8List content;
+
+  const CarEntry({
+    required this.path,
+    required this.content,
+  });
+}
+
+/// Directory entry.
+class DirectoryEntry {
+  final String name;
+  final String cid;
+  final int size;
+  final EntryType type;
+
+  const DirectoryEntry({
+    required this.name,
+    required this.cid,
+    required this.size,
+    required this.type,
+  });
+
+  factory DirectoryEntry.fromJson(Map<String, dynamic> json) {
+    return DirectoryEntry(
+      name: json['name'] as String,
+      cid: json['cid'] as String,
+      size: json['size'] as int,
+      type: EntryType.fromJson(json['type'] as String),
+    );
+  }
+}
+
+/// File entry for directory creation.
+class FileEntry {
+  final String path;
+  final Uint8List content;
+
+  const FileEntry({
+    required this.path,
+    required this.content,
+  });
+}
+
+/// Storage usage statistics.
+class StorageStats {
+  final int totalSize;
+  final int pinCount;
+  final int bandwidthUsed;
+  final double quotaUsed;
+
+  const StorageStats({
+    required this.totalSize,
+    required this.pinCount,
+    required this.bandwidthUsed,
+    required this.quotaUsed,
+  });
+
+  factory StorageStats.fromJson(Map<String, dynamic> json) {
+    return StorageStats(
+      totalSize: json['total_size'] as int,
+      pinCount: json['pin_count'] as int,
+      bandwidthUsed: json['bandwidth_used'] as int,
+      quotaUsed: (json['quota_used'] as num).toDouble(),
+    );
+  }
+}
+
+/// Exception thrown by storage operations.
+class StorageException implements Exception {
+  final String message;
+  final String? code;
+  final int? statusCode;
+
+  const StorageException(this.message, {this.code, this.statusCode});
+
+  @override
+  String toString() => 'StorageException: $message';
+}

sdk/flutter/lib/src/wallet/synor_wallet.dart

@@ -0,0 +1,244 @@
+/// Synor Wallet SDK client for Flutter/Dart.
+library synor_wallet;
+
+import 'dart:async';
+import 'dart:convert';
+import 'package:http/http.dart' as http;
+import 'types.dart';
+
+export 'types.dart';
+
+/// Synor Wallet SDK client for Flutter/Dart.
+///
+/// Provides key management, transaction signing, and balance queries
+/// for the Synor blockchain.
+///
+/// Example:
+/// ```dart
+/// final wallet = SynorWallet(WalletConfig(apiKey: 'your-api-key'));
+///
+/// // Create a new wallet
+/// final result = await wallet.createWallet(type: WalletType.standard);
+/// print('Wallet ID: ${result.wallet.id}');
+/// print('Mnemonic: ${result.mnemonic}');
+///
+/// // Get balance
+/// final balance = await wallet.getBalance(result.wallet.addresses[0].address);
+/// print('Balance: ${balance.total}');
+///
+/// wallet.close();
+/// ```
+class SynorWallet {
+  final WalletConfig config;
+  final http.Client _client;
+
+  SynorWallet(this.config) : _client = http.Client();
+
+  /// Create a new wallet.
+  Future<CreateWalletResult> createWallet({
+    WalletType type = WalletType.standard,
+  }) async {
+    final body = {
+      'type': type.toJson(),
+      'network': config.network.toJson(),
+    };
+    return _post('/wallets', body, CreateWalletResult.fromJson);
+  }
+
+  /// Import a wallet from a mnemonic phrase.
+  Future<Wallet> importWallet(String mnemonic, {String? passphrase}) async {
+    final body = {
+      'mnemonic': mnemonic,
+      'passphrase': passphrase,
+      'network': config.network.toJson(),
+    };
+    return _post('/wallets/import', body, Wallet.fromJson);
+  }
+
+  /// Get a wallet by ID.
+  Future<Wallet> getWallet(String walletId) async {
+    return _get('/wallets/$walletId', Wallet.fromJson);
+  }
+
+  /// Generate a new address for a wallet.
+  Future<Address> generateAddress(String walletId, {bool isChange = false}) async {
+    final body = {'is_change': isChange};
+    return _post('/wallets/$walletId/addresses', body, Address.fromJson);
+  }
+
+  /// Get a stealth address for privacy transactions.
+  Future<StealthAddress> getStealthAddress(String walletId) async {
+    return _get('/wallets/$walletId/stealth-address', StealthAddress.fromJson);
+  }
+
+  /// Sign a transaction.
+  Future<SignedTransaction> signTransaction(
+    String walletId,
+    Transaction transaction,
+  ) async {
+    final body = {
+      'wallet_id': walletId,
+      'transaction': transaction.toJson(),
+    };
+    return _post('/transactions/sign', body, SignedTransaction.fromJson);
+  }
+
+  /// Sign a message with a wallet address.
+  Future<Signature> signMessage(
+    String walletId,
+    String message, {
+    int addressIndex = 0,
+  }) async {
+    final body = {
+      'wallet_id': walletId,
+      'message': message,
+      'address_index': addressIndex,
+    };
+    return _post('/messages/sign', body, Signature.fromJson);
+  }
+
+  /// Verify a message signature.
+  Future<bool> verifyMessage(
+    String message,
+    String signature,
+    String address,
+  ) async {
+    final body = {
+      'message': message,
+      'signature': signature,
+      'address': address,
+    };
+    final response = await _post<Map<String, dynamic>>(
+      '/messages/verify',
+      body,
+      (json) => json,
+    );
+    return response['valid'] as bool? ?? false;
+  }
+
+  /// Get the balance for an address.
+  Future<Balance> getBalance(String address) async {
+    return _get('/addresses/$address/balance', Balance.fromJson);
+  }
+
+  /// Get UTXOs for an address.
+  Future<List<UTXO>> getUTXOs(String address, {int minConfirmations = 1}) async {
+    return _getList(
+      '/addresses/$address/utxos?min_confirmations=$minConfirmations',
+      UTXO.fromJson,
+    );
+  }
+
+  /// Estimate transaction fee.
+  Future<int> estimateFee({Priority priority = Priority.medium}) async {
+    final response = await _get<Map<String, dynamic>>(
+      '/fees/estimate?priority=${priority.toJson()}',
+      (json) => json,
+    );
+    return response['fee_per_byte'] as int? ?? 0;
+  }
+
+  // HTTP helper methods
+
+  Future<T> _get<T>(String path, T Function(Map<String, dynamic>) fromJson) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+          )
+          .timeout(config.timeout);
+
+      return _handleResponse(response, fromJson);
+    });
+  }
+
+  Future<List<T>> _getList<T>(
+    String path,
+    T Function(Map<String, dynamic>) fromJson,
+  ) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .get(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+          )
+          .timeout(config.timeout);
+
+      if (response.statusCode >= 200 && response.statusCode < 300) {
+        final List<dynamic> jsonList = jsonDecode(response.body);
+        return jsonList
+            .map((e) => fromJson(e as Map<String, dynamic>))
+            .toList();
+      }
+
+      throw WalletException(
+        'HTTP error: ${response.body}',
+        statusCode: response.statusCode,
+      );
+    });
+  }
+
+  Future<T> _post<T>(
+    String path,
+    Map<String, dynamic> body,
+    T Function(Map<String, dynamic>) fromJson,
+  ) async {
+    return _executeWithRetry(() async {
+      final response = await _client
+          .post(
+            Uri.parse('${config.endpoint}$path'),
+            headers: _headers,
+            body: jsonEncode(body),
+          )
+          .timeout(config.timeout);
+
+      return _handleResponse(response, fromJson);
+    });
+  }
+
+  Map<String, String> get _headers => {
+        'Authorization': 'Bearer ${config.apiKey}',
+        'Content-Type': 'application/json',
+      };
+
+  T _handleResponse<T>(
+    http.Response response,
+    T Function(Map<String, dynamic>) fromJson,
+  ) {
+    if (response.statusCode >= 200 && response.statusCode < 300) {
+      final json = jsonDecode(response.body) as Map<String, dynamic>;
+      return fromJson(json);
+    }
+
+    throw WalletException(
+      'HTTP error: ${response.body}',
+      statusCode: response.statusCode,
+    );
+  }
+
+  Future<T> _executeWithRetry<T>(Future<T> Function() operation) async {
+    Exception? lastError;
+
+    for (var attempt = 0; attempt < config.retries; attempt++) {
+      try {
+        return await operation();
+      } catch (e) {
+        lastError = e as Exception;
+        if (config.debug) {
+          print('Attempt ${attempt + 1} failed: $e');
+        }
+        if (attempt < config.retries - 1) {
+          await Future.delayed(Duration(seconds: attempt + 1));
+        }
+      }
+    }
+
+    throw lastError ?? WalletException('Unknown error after ${config.retries} retries');
+  }
+
+  /// Close the client and release resources.
+  void close() {
+    _client.close();
+  }
+}

sdk/flutter/lib/src/wallet/types.dart

@@ -0,0 +1,330 @@
+/// Types for Synor Wallet SDK.
+library synor_wallet_types;
+
+/// Network environment for wallet operations.
+enum Network {
+  mainnet,
+  testnet,
+  devnet;
+
+  String toJson() => name;
+
+  static Network fromJson(String json) {
+    return Network.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => Network.mainnet,
+    );
+  }
+}
+
+/// Type of wallet to create.
+enum WalletType {
+  standard,
+  multisig,
+  hardware,
+  stealth;
+
+  String toJson() => name;
+
+  static WalletType fromJson(String json) {
+    return WalletType.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => WalletType.standard,
+    );
+  }
+}
+
+/// Transaction priority for fee estimation.
+enum Priority {
+  low,
+  medium,
+  high;
+
+  String toJson() => name;
+
+  static Priority fromJson(String json) {
+    return Priority.values.firstWhere(
+      (e) => e.name == json,
+      orElse: () => Priority.medium,
+    );
+  }
+}
+
+/// Configuration for the wallet client.
+class WalletConfig {
+  final String apiKey;
+  final String endpoint;
+  final Network network;
+  final Duration timeout;
+  final int retries;
+  final bool debug;
+
+  const WalletConfig({
+    required this.apiKey,
+    this.endpoint = 'https://wallet.synor.io/v1',
+    this.network = Network.mainnet,
+    this.timeout = const Duration(seconds: 30),
+    this.retries = 3,
+    this.debug = false,
+  });
+}
+
+/// A wallet address.
+class Address {
+  final String address;
+  final int index;
+  final bool isChange;
+
+  const Address({
+    required this.address,
+    required this.index,
+    this.isChange = false,
+  });
+
+  factory Address.fromJson(Map<String, dynamic> json) {
+    return Address(
+      address: json['address'] as String,
+      index: json['index'] as int,
+      isChange: json['is_change'] as bool? ?? false,
+    );
+  }
+
+  Map<String, dynamic> toJson() => {
+        'address': address,
+        'index': index,
+        'is_change': isChange,
+      };
+}
+
+/// A Synor wallet with addresses and keys.
+class Wallet {
+  final String id;
+  final WalletType type;
+  final Network network;
+  final List<Address> addresses;
+  final String createdAt;
+
+  const Wallet({
+    required this.id,
+    required this.type,
+    required this.network,
+    required this.addresses,
+    required this.createdAt,
+  });
+
+  factory Wallet.fromJson(Map<String, dynamic> json) {
+    return Wallet(
+      id: json['id'] as String,
+      type: WalletType.fromJson(json['type'] as String),
+      network: Network.fromJson(json['network'] as String),
+      addresses: (json['addresses'] as List)
+          .map((e) => Address.fromJson(e as Map<String, dynamic>))
+          .toList(),
+      createdAt: json['created_at'] as String,
+    );
+  }
+}
+
+/// Stealth address for privacy transactions.
+class StealthAddress {
+  final String spendPublicKey;
+  final String viewPublicKey;
+  final String oneTimeAddress;
+
+  const StealthAddress({
+    required this.spendPublicKey,
+    required this.viewPublicKey,
+    required this.oneTimeAddress,
+  });
+
+  factory StealthAddress.fromJson(Map<String, dynamic> json) {
+    return StealthAddress(
+      spendPublicKey: json['spend_public_key'] as String,
+      viewPublicKey: json['view_public_key'] as String,
+      oneTimeAddress: json['one_time_address'] as String,
+    );
+  }
+}
+
+/// Result of wallet creation.
+class CreateWalletResult {
+  final Wallet wallet;
+  final String? mnemonic;
+
+  const CreateWalletResult({
+    required this.wallet,
+    this.mnemonic,
+  });
+
+  factory CreateWalletResult.fromJson(Map<String, dynamic> json) {
+    return CreateWalletResult(
+      wallet: Wallet.fromJson(json['wallet'] as Map<String, dynamic>),
+      mnemonic: json['mnemonic'] as String?,
+    );
+  }
+}
+
+/// Transaction input (UTXO reference).
+class TransactionInput {
+  final String txid;
+  final int vout;
+  final int amount;
+
+  const TransactionInput({
+    required this.txid,
+    required this.vout,
+    required this.amount,
+  });
+
+  Map<String, dynamic> toJson() => {
+        'txid': txid,
+        'vout': vout,
+        'amount': amount,
+      };
+}
+
+/// Transaction output.
+class TransactionOutput {
+  final String address;
+  final int amount;
+
+  const TransactionOutput({
+    required this.address,
+    required this.amount,
+  });
+
+  Map<String, dynamic> toJson() => {
+        'address': address,
+        'amount': amount,
+      };
+}
+
+/// A blockchain transaction for signing.
+class Transaction {
+  final List<TransactionInput> inputs;
+  final List<TransactionOutput> outputs;
+  final int? fee;
+  final Priority priority;
+
+  const Transaction({
+    required this.inputs,
+    required this.outputs,
+    this.fee,
+    this.priority = Priority.medium,
+  });
+
+  Map<String, dynamic> toJson() => {
+        'inputs': inputs.map((e) => e.toJson()).toList(),
+        'outputs': outputs.map((e) => e.toJson()).toList(),
+        if (fee != null) 'fee': fee,
+        'priority': priority.toJson(),
+      };
+}
+
+/// A signed transaction ready for broadcast.
+class SignedTransaction {
+  final String txid;
+  final String hex;
+  final int size;
+  final int fee;
+
+  const SignedTransaction({
+    required this.txid,
+    required this.hex,
+    required this.size,
+    required this.fee,
+  });
+
+  factory SignedTransaction.fromJson(Map<String, dynamic> json) {
+    return SignedTransaction(
+      txid: json['txid'] as String,
+      hex: json['hex'] as String,
+      size: json['size'] as int,
+      fee: json['fee'] as int,
+    );
+  }
+}
+
+/// A cryptographic signature.
+class Signature {
+  final String signature;
+  final String address;
+  final int? recoveryId;
+
+  const Signature({
+    required this.signature,
+    required this.address,
+    this.recoveryId,
+  });
+
+  factory Signature.fromJson(Map<String, dynamic> json) {
+    return Signature(
+      signature: json['signature'] as String,
+      address: json['address'] as String,
+      recoveryId: json['recovery_id'] as int?,
+    );
+  }
+}
+
+/// Unspent transaction output.
+class UTXO {
+  final String txid;
+  final int vout;
+  final int amount;
+  final String address;
+  final int confirmations;
+  final String? scriptPubKey;
+
+  const UTXO({
+    required this.txid,
+    required this.vout,
+    required this.amount,
+    required this.address,
+    required this.confirmations,
+    this.scriptPubKey,
+  });
+
+  factory UTXO.fromJson(Map<String, dynamic> json) {
+    return UTXO(
+      txid: json['txid'] as String,
+      vout: json['vout'] as int,
+      amount: json['amount'] as int,
+      address: json['address'] as String,
+      confirmations: json['confirmations'] as int,
+      scriptPubKey: json['script_pubkey'] as String?,
+    );
+  }
+}
+
+/// Wallet balance information.
+class Balance {
+  final int confirmed;
+  final int unconfirmed;
+  final int total;
+
+  const Balance({
+    required this.confirmed,
+    required this.unconfirmed,
+    required this.total,
+  });
+
+  factory Balance.fromJson(Map<String, dynamic> json) {
+    return Balance(
+      confirmed: json['confirmed'] as int,
+      unconfirmed: json['unconfirmed'] as int,
+      total: json['total'] as int,
+    );
+  }
+}
+
+/// Exception thrown by wallet operations.
+class WalletException implements Exception {
+  final String message;
+  final String? code;
+  final int? statusCode;
+
+  const WalletException(this.message, {this.code, this.statusCode});
+
+  @override
+  String toString() => 'WalletException: $message';
+}

sdk/flutter/lib/synor_sdk.dart

@@ -0,0 +1,60 @@
+/// Synor SDK for Flutter/Dart
+///
+/// A comprehensive SDK for the Synor blockchain platform including:
+/// - **Compute**: Distributed heterogeneous computing
+/// - **Wallet**: Key management and transaction signing
+/// - **RPC**: Blockchain queries and subscriptions
+/// - **Storage**: IPFS-compatible decentralized storage
+///
+/// ## Quick Start
+///
+/// ```dart
+/// import 'package:synor_sdk/synor_sdk.dart';
+///
+/// void main() async {
+///   // Wallet operations
+///   final wallet = SynorWallet(WalletConfig(apiKey: 'your-api-key'));
+///   final result = await wallet.createWallet();
+///   print('Wallet ID: ${result.wallet.id}');
+///
+///   // RPC queries
+///   final rpc = SynorRpc(RpcConfig(apiKey: 'your-api-key'));
+///   final block = await rpc.getLatestBlock();
+///   print('Latest block: ${block.height}');
+///
+///   // Storage operations
+///   final storage = SynorStorage(StorageConfig(apiKey: 'your-api-key'));
+///   final data = utf8.encode('Hello, World!');
+///   final upload = await storage.upload(Uint8List.fromList(data));
+///   print('CID: ${upload.cid}');
+///
+///   // Clean up
+///   wallet.close();
+///   rpc.close();
+///   storage.close();
+/// }
+/// ```
+///
+/// ## Naming Conventions
+///
+/// Some types have service-specific prefixes to avoid conflicts:
+/// - Wallet: `Network`, `WalletType`, `Priority`
+/// - RPC: `RpcNetwork`, `RpcPriority`, `RpcTransaction`
+/// - Storage: `PinStatus`, `HashAlgorithm`, `EntryType`
+/// - Compute: `Precision`, `ProcessorType`, `Priority` (as `ComputePriority`)
+library synor_sdk;
+
+// Compute SDK - hide Priority to avoid conflict with Wallet
+export 'synor_compute.dart' hide Priority;
+
+// Wallet SDK
+export 'src/wallet/synor_wallet.dart';
+
+// RPC SDK
+export 'src/rpc/synor_rpc.dart';
+
+// Storage SDK
+export 'src/storage/synor_storage.dart';
+
+// Re-export Compute Priority with alias-friendly access
+// Users can import compute directly for Priority: import 'package:synor_sdk/synor_compute.dart';

sdk/flutter/pubspec.yaml

@@ -1,5 +1,5 @@
-name: synor_compute
-description: Flutter/Dart SDK for Synor Compute - distributed heterogeneous computing platform
+name: synor_sdk
+description: Flutter/Dart SDK for Synor - Compute, Wallet, RPC, and Storage
 version: 0.1.0
 homepage: https://github.com/mrgulshanyadav/Blockchain.cc
 repository: https://github.com/mrgulshanyadav/Blockchain.cc/tree/main/sdk/flutter

sdk/go/bridge/client.go

@@ -0,0 +1,625 @@
+// Package bridge provides cross-chain asset transfer functionality.
+package bridge
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"sync/atomic"
+	"time"
+)
+
+// Client is a Synor Bridge client for cross-chain transfers.
+type Client struct {
+	config     Config
+	httpClient *http.Client
+	closed     atomic.Bool
+}
+
+// NewClient creates a new bridge client with the given configuration.
+func NewClient(config Config) *Client {
+	if config.Endpoint == "" {
+		config.Endpoint = DefaultEndpoint
+	}
+	if config.Timeout == 0 {
+		config.Timeout = 60 * time.Second
+	}
+	if config.Retries == 0 {
+		config.Retries = 3
+	}
+
+	return &Client{
+		config: config,
+		httpClient: &http.Client{
+			Timeout: config.Timeout,
+		},
+	}
+}
+
+// ==================== Chain Operations ====================
+
+// GetSupportedChains returns all supported chains.
+func (c *Client) GetSupportedChains(ctx context.Context) ([]Chain, error) {
+	var resp struct {
+		Chains []Chain `json:"chains"`
+	}
+	if err := c.request(ctx, "GET", "/chains", nil, &resp); err != nil {
+		return nil, err
+	}
+	return resp.Chains, nil
+}
+
+// GetChain returns chain information by ID.
+func (c *Client) GetChain(ctx context.Context, chainID ChainID) (*Chain, error) {
+	var chain Chain
+	if err := c.request(ctx, "GET", fmt.Sprintf("/chains/%s", chainID), nil, &chain); err != nil {
+		return nil, err
+	}
+	return &chain, nil
+}
+
+// IsChainSupported checks if a chain is supported.
+func (c *Client) IsChainSupported(ctx context.Context, chainID ChainID) bool {
+	chain, err := c.GetChain(ctx, chainID)
+	if err != nil {
+		return false
+	}
+	return chain.Supported
+}
+
+// ==================== Asset Operations ====================
+
+// GetSupportedAssets returns supported assets for a chain.
+func (c *Client) GetSupportedAssets(ctx context.Context, chainID ChainID) ([]Asset, error) {
+	var resp struct {
+		Assets []Asset `json:"assets"`
+	}
+	if err := c.request(ctx, "GET", fmt.Sprintf("/chains/%s/assets", chainID), nil, &resp); err != nil {
+		return nil, err
+	}
+	return resp.Assets, nil
+}
+
+// GetAsset returns asset information by ID.
+func (c *Client) GetAsset(ctx context.Context, assetID string) (*Asset, error) {
+	var asset Asset
+	if err := c.request(ctx, "GET", fmt.Sprintf("/assets/%s", assetID), nil, &asset); err != nil {
+		return nil, err
+	}
+	return &asset, nil
+}
+
+// GetWrappedAsset returns the wrapped asset mapping.
+func (c *Client) GetWrappedAsset(ctx context.Context, originalAssetID string, targetChain ChainID) (*WrappedAsset, error) {
+	var wrapped WrappedAsset
+	path := fmt.Sprintf("/assets/%s/wrapped/%s", originalAssetID, targetChain)
+	if err := c.request(ctx, "GET", path, nil, &wrapped); err != nil {
+		return nil, err
+	}
+	return &wrapped, nil
+}
+
+// GetWrappedAssets returns all wrapped assets for a chain.
+func (c *Client) GetWrappedAssets(ctx context.Context, chainID ChainID) ([]WrappedAsset, error) {
+	var resp struct {
+		Assets []WrappedAsset `json:"assets"`
+	}
+	if err := c.request(ctx, "GET", fmt.Sprintf("/chains/%s/wrapped", chainID), nil, &resp); err != nil {
+		return nil, err
+	}
+	return resp.Assets, nil
+}
+
+// ==================== Fee & Rate Operations ====================
+
+// EstimateFee estimates the bridge fee for a transfer.
+func (c *Client) EstimateFee(ctx context.Context, asset, amount string, sourceChain, targetChain ChainID) (*FeeEstimate, error) {
+	body := map[string]interface{}{
+		"asset":       asset,
+		"amount":      amount,
+		"sourceChain": sourceChain,
+		"targetChain": targetChain,
+	}
+	var estimate FeeEstimate
+	if err := c.request(ctx, "POST", "/fees/estimate", body, &estimate); err != nil {
+		return nil, err
+	}
+	return &estimate, nil
+}
+
+// GetExchangeRate returns the exchange rate between two assets.
+func (c *Client) GetExchangeRate(ctx context.Context, fromAsset, toAsset string) (*ExchangeRate, error) {
+	var rate ExchangeRate
+	path := fmt.Sprintf("/rates/%s/%s", url.PathEscape(fromAsset), url.PathEscape(toAsset))
+	if err := c.request(ctx, "GET", path, nil, &rate); err != nil {
+		return nil, err
+	}
+	return &rate, nil
+}
+
+// ==================== Lock-Mint Flow ====================
+
+// Lock locks assets on the source chain for cross-chain transfer.
+// This is step 1 of the lock-mint flow.
+func (c *Client) Lock(ctx context.Context, asset, amount string, targetChain ChainID, opts *LockOptions) (*LockReceipt, error) {
+	body := map[string]interface{}{
+		"asset":       asset,
+		"amount":      amount,
+		"targetChain": targetChain,
+	}
+	if opts != nil {
+		if opts.Recipient != "" {
+			body["recipient"] = opts.Recipient
+		}
+		if opts.Deadline != 0 {
+			body["deadline"] = opts.Deadline
+		}
+		if opts.Slippage != 0 {
+			body["slippage"] = opts.Slippage
+		}
+	}
+
+	var receipt LockReceipt
+	if err := c.request(ctx, "POST", "/transfers/lock", body, &receipt); err != nil {
+		return nil, err
+	}
+	return &receipt, nil
+}
+
+// GetLockProof gets the lock proof for minting.
+// This is step 2 of the lock-mint flow.
+func (c *Client) GetLockProof(ctx context.Context, lockReceiptID string) (*LockProof, error) {
+	var proof LockProof
+	path := fmt.Sprintf("/transfers/lock/%s/proof", lockReceiptID)
+	if err := c.request(ctx, "GET", path, nil, &proof); err != nil {
+		return nil, err
+	}
+	return &proof, nil
+}
+
+// WaitForLockProof waits for the lock proof to be ready.
+func (c *Client) WaitForLockProof(ctx context.Context, lockReceiptID string, pollInterval, maxWait time.Duration) (*LockProof, error) {
+	if pollInterval == 0 {
+		pollInterval = 5 * time.Second
+	}
+	if maxWait == 0 {
+		maxWait = 10 * time.Minute
+	}
+
+	deadline := time.Now().Add(maxWait)
+	for time.Now().Before(deadline) {
+		proof, err := c.GetLockProof(ctx, lockReceiptID)
+		if err == nil {
+			return proof, nil
+		}
+
+		if bridgeErr, ok := err.(*Error); ok && bridgeErr.Code == "CONFIRMATIONS_PENDING" {
+			select {
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			case <-time.After(pollInterval):
+				continue
+			}
+		}
+		return nil, err
+	}
+
+	return nil, &Error{Message: "Timeout waiting for lock proof", Code: "CONFIRMATIONS_PENDING"}
+}
+
+// Mint mints wrapped tokens on the target chain.
+// This is step 3 of the lock-mint flow.
+func (c *Client) Mint(ctx context.Context, proof *LockProof, targetAddress string, opts *MintOptions) (*SignedTransaction, error) {
+	body := map[string]interface{}{
+		"proof":         proof,
+		"targetAddress": targetAddress,
+	}
+	if opts != nil {
+		if opts.GasLimit != "" {
+			body["gasLimit"] = opts.GasLimit
+		}
+		if opts.MaxFeePerGas != "" {
+			body["maxFeePerGas"] = opts.MaxFeePerGas
+		}
+		if opts.MaxPriorityFeePerGas != "" {
+			body["maxPriorityFeePerGas"] = opts.MaxPriorityFeePerGas
+		}
+	}
+
+	var tx SignedTransaction
+	if err := c.request(ctx, "POST", "/transfers/mint", body, &tx); err != nil {
+		return nil, err
+	}
+	return &tx, nil
+}
+
+// ==================== Burn-Unlock Flow ====================
+
+// Burn burns wrapped tokens on the current chain.
+// This is step 1 of the burn-unlock flow.
+func (c *Client) Burn(ctx context.Context, wrappedAsset, amount string, opts *BurnOptions) (*BurnReceipt, error) {
+	body := map[string]interface{}{
+		"wrappedAsset": wrappedAsset,
+		"amount":       amount,
+	}
+	if opts != nil {
+		if opts.Recipient != "" {
+			body["recipient"] = opts.Recipient
+		}
+		if opts.Deadline != 0 {
+			body["deadline"] = opts.Deadline
+		}
+	}
+
+	var receipt BurnReceipt
+	if err := c.request(ctx, "POST", "/transfers/burn", body, &receipt); err != nil {
+		return nil, err
+	}
+	return &receipt, nil
+}
+
+// GetBurnProof gets the burn proof for unlocking.
+// This is step 2 of the burn-unlock flow.
+func (c *Client) GetBurnProof(ctx context.Context, burnReceiptID string) (*BurnProof, error) {
+	var proof BurnProof
+	path := fmt.Sprintf("/transfers/burn/%s/proof", burnReceiptID)
+	if err := c.request(ctx, "GET", path, nil, &proof); err != nil {
+		return nil, err
+	}
+	return &proof, nil
+}
+
+// WaitForBurnProof waits for the burn proof to be ready.
+func (c *Client) WaitForBurnProof(ctx context.Context, burnReceiptID string, pollInterval, maxWait time.Duration) (*BurnProof, error) {
+	if pollInterval == 0 {
+		pollInterval = 5 * time.Second
+	}
+	if maxWait == 0 {
+		maxWait = 10 * time.Minute
+	}
+
+	deadline := time.Now().Add(maxWait)
+	for time.Now().Before(deadline) {
+		proof, err := c.GetBurnProof(ctx, burnReceiptID)
+		if err == nil {
+			return proof, nil
+		}
+
+		if bridgeErr, ok := err.(*Error); ok && bridgeErr.Code == "CONFIRMATIONS_PENDING" {
+			select {
+			case <-ctx.Done():
+				return nil, ctx.Err()
+			case <-time.After(pollInterval):
+				continue
+			}
+		}
+		return nil, err
+	}
+
+	return nil, &Error{Message: "Timeout waiting for burn proof", Code: "CONFIRMATIONS_PENDING"}
+}
+
+// Unlock unlocks original tokens on the source chain.
+// This is step 3 of the burn-unlock flow.
+func (c *Client) Unlock(ctx context.Context, proof *BurnProof, opts *UnlockOptions) (*SignedTransaction, error) {
+	body := map[string]interface{}{
+		"proof": proof,
+	}
+	if opts != nil {
+		if opts.GasLimit != "" {
+			body["gasLimit"] = opts.GasLimit
+		}
+		if opts.GasPrice != "" {
+			body["gasPrice"] = opts.GasPrice
+		}
+	}
+
+	var tx SignedTransaction
+	if err := c.request(ctx, "POST", "/transfers/unlock", body, &tx); err != nil {
+		return nil, err
+	}
+	return &tx, nil
+}
+
+// ==================== Transfer Management ====================
+
+// GetTransfer returns a transfer by ID.
+func (c *Client) GetTransfer(ctx context.Context, transferID string) (*Transfer, error) {
+	var transfer Transfer
+	if err := c.request(ctx, "GET", fmt.Sprintf("/transfers/%s", transferID), nil, &transfer); err != nil {
+		return nil, err
+	}
+	return &transfer, nil
+}
+
+// GetTransferStatus returns the status of a transfer.
+func (c *Client) GetTransferStatus(ctx context.Context, transferID string) (TransferStatus, error) {
+	transfer, err := c.GetTransfer(ctx, transferID)
+	if err != nil {
+		return "", err
+	}
+	return transfer.Status, nil
+}
+
+// ListTransfers returns transfers matching the filter.
+func (c *Client) ListTransfers(ctx context.Context, filter *TransferFilter) ([]Transfer, error) {
+	params := url.Values{}
+	if filter != nil {
+		if filter.Status != "" {
+			params.Set("status", string(filter.Status))
+		}
+		if filter.SourceChain != "" {
+			params.Set("sourceChain", string(filter.SourceChain))
+		}
+		if filter.TargetChain != "" {
+			params.Set("targetChain", string(filter.TargetChain))
+		}
+		if filter.Asset != "" {
+			params.Set("asset", filter.Asset)
+		}
+		if filter.Sender != "" {
+			params.Set("sender", filter.Sender)
+		}
+		if filter.Recipient != "" {
+			params.Set("recipient", filter.Recipient)
+		}
+		if filter.FromDate != nil {
+			params.Set("fromDate", strconv.FormatInt(filter.FromDate.Unix(), 10))
+		}
+		if filter.ToDate != nil {
+			params.Set("toDate", strconv.FormatInt(filter.ToDate.Unix(), 10))
+		}
+		if filter.Limit > 0 {
+			params.Set("limit", strconv.Itoa(filter.Limit))
+		}
+		if filter.Offset > 0 {
+			params.Set("offset", strconv.Itoa(filter.Offset))
+		}
+	}
+
+	path := "/transfers"
+	if len(params) > 0 {
+		path = "/transfers?" + params.Encode()
+	}
+
+	var resp struct {
+		Transfers []Transfer `json:"transfers"`
+	}
+	if err := c.request(ctx, "GET", path, nil, &resp); err != nil {
+		return nil, err
+	}
+	return resp.Transfers, nil
+}
+
+// WaitForTransfer waits for a transfer to complete.
+func (c *Client) WaitForTransfer(ctx context.Context, transferID string, pollInterval, maxWait time.Duration) (*Transfer, error) {
+	if pollInterval == 0 {
+		pollInterval = 10 * time.Second
+	}
+	if maxWait == 0 {
+		maxWait = 30 * time.Minute
+	}
+
+	finalStatuses := map[TransferStatus]bool{
+		TransferStatusCompleted: true,
+		TransferStatusFailed:    true,
+		TransferStatusRefunded:  true,
+	}
+
+	deadline := time.Now().Add(maxWait)
+	for time.Now().Before(deadline) {
+		transfer, err := c.GetTransfer(ctx, transferID)
+		if err != nil {
+			return nil, err
+		}
+
+		if finalStatuses[transfer.Status] {
+			return transfer, nil
+		}
+
+		select {
+		case <-ctx.Done():
+			return nil, ctx.Err()
+		case <-time.After(pollInterval):
+			continue
+		}
+	}
+
+	return nil, &Error{Message: "Timeout waiting for transfer completion"}
+}
+
+// ==================== Convenience Methods ====================
+
+// BridgeTo executes a complete lock-mint transfer.
+func (c *Client) BridgeTo(ctx context.Context, asset, amount string, targetChain ChainID, targetAddress string, lockOpts *LockOptions, mintOpts *MintOptions) (*Transfer, error) {
+	// Lock on source chain
+	lockReceipt, err := c.Lock(ctx, asset, amount, targetChain, lockOpts)
+	if err != nil {
+		return nil, err
+	}
+
+	if c.config.Debug {
+		fmt.Printf("Locked: %s, waiting for confirmations...\n", lockReceipt.ID)
+	}
+
+	// Wait for proof
+	proof, err := c.WaitForLockProof(ctx, lockReceipt.ID, 0, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	if c.config.Debug {
+		fmt.Printf("Proof ready, minting on %s...\n", targetChain)
+	}
+
+	// Mint on target chain
+	_, err = c.Mint(ctx, proof, targetAddress, mintOpts)
+	if err != nil {
+		return nil, err
+	}
+
+	// Return final transfer status
+	return c.WaitForTransfer(ctx, lockReceipt.ID, 0, 0)
+}
+
+// BridgeBack executes a complete burn-unlock transfer.
+func (c *Client) BridgeBack(ctx context.Context, wrappedAsset, amount string, burnOpts *BurnOptions, unlockOpts *UnlockOptions) (*Transfer, error) {
+	// Burn wrapped tokens
+	burnReceipt, err := c.Burn(ctx, wrappedAsset, amount, burnOpts)
+	if err != nil {
+		return nil, err
+	}
+
+	if c.config.Debug {
+		fmt.Printf("Burned: %s, waiting for confirmations...\n", burnReceipt.ID)
+	}
+
+	// Wait for proof
+	proof, err := c.WaitForBurnProof(ctx, burnReceipt.ID, 0, 0)
+	if err != nil {
+		return nil, err
+	}
+
+	if c.config.Debug {
+		fmt.Printf("Proof ready, unlocking on %s...\n", burnReceipt.TargetChain)
+	}
+
+	// Unlock on original chain
+	_, err = c.Unlock(ctx, proof, unlockOpts)
+	if err != nil {
+		return nil, err
+	}
+
+	// Return final transfer status
+	return c.WaitForTransfer(ctx, burnReceipt.ID, 0, 0)
+}
+
+// ==================== Lifecycle ====================
+
+// Close closes the client.
+func (c *Client) Close() {
+	c.closed.Store(true)
+}
+
+// IsClosed returns whether the client is closed.
+func (c *Client) IsClosed() bool {
+	return c.closed.Load()
+}
+
+// HealthCheck performs a health check.
+func (c *Client) HealthCheck(ctx context.Context) bool {
+	var resp struct {
+		Status string `json:"status"`
+	}
+	if err := c.request(ctx, "GET", "/health", nil, &resp); err != nil {
+		return false
+	}
+	return resp.Status == "healthy"
+}
+
+// ==================== Private Methods ====================
+
+func (c *Client) request(ctx context.Context, method, path string, body interface{}, result interface{}) error {
+	if c.IsClosed() {
+		return &Error{Message: "Client has been closed"}
+	}
+
+	var lastErr error
+	for attempt := 0; attempt < c.config.Retries; attempt++ {
+		err := c.doRequest(ctx, method, path, body, result)
+		if err == nil {
+			return nil
+		}
+
+		if c.config.Debug {
+			fmt.Printf("Attempt %d failed: %v\n", attempt+1, err)
+		}
+
+		lastErr = err
+		if attempt < c.config.Retries-1 {
+			time.Sleep(time.Duration(1<<attempt) * time.Second)
+		}
+	}
+
+	return lastErr
+}
+
+func (c *Client) doRequest(ctx context.Context, method, path string, body interface{}, result interface{}) error {
+	url := c.config.Endpoint + path
+
+	var bodyReader io.Reader
+	if body != nil {
+		jsonBody, err := json.Marshal(body)
+		if err != nil {
+			return err
+		}
+		bodyReader = bytes.NewReader(jsonBody)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, method, url, bodyReader)
+	if err != nil {
+		return err
+	}
+
+	req.Header.Set("Authorization", "Bearer "+c.config.APIKey)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-SDK-Version", "go/0.1.0")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+
+	if resp.StatusCode >= 400 {
+		var errorResp struct {
+			Message string `json:"message"`
+			Error   string `json:"error"`
+			Code    string `json:"code"`
+		}
+		json.Unmarshal(respBody, &errorResp)
+
+		message := errorResp.Message
+		if message == "" {
+			message = errorResp.Error
+		}
+		if message == "" {
+			message = fmt.Sprintf("HTTP %d", resp.StatusCode)
+		}
+
+		return &Error{
+			Message:    message,
+			Code:       errorResp.Code,
+			StatusCode: resp.StatusCode,
+		}
+	}
+
+	if result != nil {
+		if err := json.Unmarshal(respBody, result); err != nil {
+			return err
+		}
+	}
+
+	return nil
+}
+
+// Error represents a bridge error.
+type Error struct {
+	Message    string
+	Code       string
+	StatusCode int
+}
+
+func (e *Error) Error() string {
+	return e.Message
+}

sdk/go/bridge/types.go

@@ -0,0 +1,271 @@
+// Package bridge provides cross-chain asset transfer functionality.
+//
+// The Bridge SDK enables transferring assets between Synor and other blockchain
+// networks using a lock-mint and burn-unlock pattern.
+package bridge
+
+import (
+	"time"
+)
+
+// ChainID represents a supported blockchain network.
+type ChainID string
+
+const (
+	ChainSynor     ChainID = "synor"
+	ChainEthereum  ChainID = "ethereum"
+	ChainPolygon   ChainID = "polygon"
+	ChainArbitrum  ChainID = "arbitrum"
+	ChainOptimism  ChainID = "optimism"
+	ChainBSC       ChainID = "bsc"
+	ChainAvalanche ChainID = "avalanche"
+	ChainSolana    ChainID = "solana"
+	ChainCosmos    ChainID = "cosmos"
+)
+
+// NativeCurrency represents a chain's native currency.
+type NativeCurrency struct {
+	Name     string `json:"name"`
+	Symbol   string `json:"symbol"`
+	Decimals int    `json:"decimals"`
+}
+
+// Chain represents a supported blockchain network.
+type Chain struct {
+	ID                 ChainID        `json:"id"`
+	Name               string         `json:"name"`
+	ChainID            int64          `json:"chainId"`
+	RPCURL             string         `json:"rpcUrl"`
+	ExplorerURL        string         `json:"explorerUrl"`
+	NativeCurrency     NativeCurrency `json:"nativeCurrency"`
+	Confirmations      int            `json:"confirmations"`
+	EstimatedBlockTime int            `json:"estimatedBlockTime"` // seconds
+	Supported          bool           `json:"supported"`
+}
+
+// AssetType represents the type of asset.
+type AssetType string
+
+const (
+	AssetTypeNative  AssetType = "native"
+	AssetTypeERC20   AssetType = "erc20"
+	AssetTypeERC721  AssetType = "erc721"
+	AssetTypeERC1155 AssetType = "erc1155"
+)
+
+// Asset represents a blockchain asset.
+type Asset struct {
+	ID              string    `json:"id"`
+	Symbol          string    `json:"symbol"`
+	Name            string    `json:"name"`
+	Type            AssetType `json:"type"`
+	Chain           ChainID   `json:"chain"`
+	ContractAddress string    `json:"contractAddress,omitempty"`
+	Decimals        int       `json:"decimals"`
+	LogoURL         string    `json:"logoUrl,omitempty"`
+	Verified        bool      `json:"verified"`
+}
+
+// WrappedAsset represents a mapping between original and wrapped assets.
+type WrappedAsset struct {
+	OriginalAsset  Asset   `json:"originalAsset"`
+	WrappedAsset   Asset   `json:"wrappedAsset"`
+	Chain          ChainID `json:"chain"`
+	BridgeContract string  `json:"bridgeContract"`
+}
+
+// TransferStatus represents the status of a bridge transfer.
+type TransferStatus string
+
+const (
+	TransferStatusPending    TransferStatus = "pending"
+	TransferStatusLocked     TransferStatus = "locked"
+	TransferStatusConfirming TransferStatus = "confirming"
+	TransferStatusMinting    TransferStatus = "minting"
+	TransferStatusCompleted  TransferStatus = "completed"
+	TransferStatusFailed     TransferStatus = "failed"
+	TransferStatusRefunded   TransferStatus = "refunded"
+)
+
+// TransferDirection represents the direction of a bridge transfer.
+type TransferDirection string
+
+const (
+	TransferDirectionLockMint   TransferDirection = "lock_mint"
+	TransferDirectionBurnUnlock TransferDirection = "burn_unlock"
+)
+
+// ValidatorSignature represents a validator's signature for proof.
+type ValidatorSignature struct {
+	Validator string `json:"validator"`
+	Signature string `json:"signature"`
+	Timestamp int64  `json:"timestamp"`
+}
+
+// LockReceipt represents a lock receipt from the source chain.
+type LockReceipt struct {
+	ID                    string  `json:"id"`
+	TxHash                string  `json:"txHash"`
+	SourceChain           ChainID `json:"sourceChain"`
+	TargetChain           ChainID `json:"targetChain"`
+	Asset                 Asset   `json:"asset"`
+	Amount                string  `json:"amount"`
+	Sender                string  `json:"sender"`
+	Recipient             string  `json:"recipient"`
+	LockTimestamp         int64   `json:"lockTimestamp"`
+	Confirmations         int     `json:"confirmations"`
+	RequiredConfirmations int     `json:"requiredConfirmations"`
+}
+
+// LockProof represents proof for minting on the target chain.
+type LockProof struct {
+	LockReceipt LockReceipt          `json:"lockReceipt"`
+	MerkleProof []string             `json:"merkleProof"`
+	BlockHeader string               `json:"blockHeader"`
+	Signatures  []ValidatorSignature `json:"signatures"`
+}
+
+// BurnReceipt represents a burn receipt for unlocking.
+type BurnReceipt struct {
+	ID                    string  `json:"id"`
+	TxHash                string  `json:"txHash"`
+	SourceChain           ChainID `json:"sourceChain"`
+	TargetChain           ChainID `json:"targetChain"`
+	WrappedAsset          Asset   `json:"wrappedAsset"`
+	OriginalAsset         Asset   `json:"originalAsset"`
+	Amount                string  `json:"amount"`
+	Sender                string  `json:"sender"`
+	Recipient             string  `json:"recipient"`
+	BurnTimestamp         int64   `json:"burnTimestamp"`
+	Confirmations         int     `json:"confirmations"`
+	RequiredConfirmations int     `json:"requiredConfirmations"`
+}
+
+// BurnProof represents proof for unlocking on the original chain.
+type BurnProof struct {
+	BurnReceipt BurnReceipt          `json:"burnReceipt"`
+	MerkleProof []string             `json:"merkleProof"`
+	BlockHeader string               `json:"blockHeader"`
+	Signatures  []ValidatorSignature `json:"signatures"`
+}
+
+// Transfer represents a complete bridge transfer record.
+type Transfer struct {
+	ID           string            `json:"id"`
+	Direction    TransferDirection `json:"direction"`
+	Status       TransferStatus    `json:"status"`
+	SourceChain  ChainID           `json:"sourceChain"`
+	TargetChain  ChainID           `json:"targetChain"`
+	Asset        Asset             `json:"asset"`
+	Amount       string            `json:"amount"`
+	Sender       string            `json:"sender"`
+	Recipient    string            `json:"recipient"`
+	SourceTxHash string            `json:"sourceTxHash,omitempty"`
+	TargetTxHash string            `json:"targetTxHash,omitempty"`
+	Fee          string            `json:"fee"`
+	FeeAsset     Asset             `json:"feeAsset"`
+	CreatedAt    int64             `json:"createdAt"`
+	UpdatedAt    int64             `json:"updatedAt"`
+	CompletedAt  int64             `json:"completedAt,omitempty"`
+	ErrorMessage string            `json:"errorMessage,omitempty"`
+}
+
+// FeeEstimate represents a fee estimate for a bridge transfer.
+type FeeEstimate struct {
+	BridgeFee     string `json:"bridgeFee"`
+	GasFeeSource  string `json:"gasFeeSource"`
+	GasFeeTarget  string `json:"gasFeeTarget"`
+	TotalFee      string `json:"totalFee"`
+	FeeAsset      Asset  `json:"feeAsset"`
+	EstimatedTime int    `json:"estimatedTime"` // seconds
+	ExchangeRate  string `json:"exchangeRate,omitempty"`
+}
+
+// ExchangeRate represents an exchange rate between assets.
+type ExchangeRate struct {
+	FromAsset   Asset  `json:"fromAsset"`
+	ToAsset     Asset  `json:"toAsset"`
+	Rate        string `json:"rate"`
+	InverseRate string `json:"inverseRate"`
+	LastUpdated int64  `json:"lastUpdated"`
+	Source      string `json:"source"`
+}
+
+// SignedTransaction represents a signed transaction result.
+type SignedTransaction struct {
+	TxHash               string  `json:"txHash"`
+	Chain                ChainID `json:"chain"`
+	From                 string  `json:"from"`
+	To                   string  `json:"to"`
+	Value                string  `json:"value"`
+	Data                 string  `json:"data"`
+	GasLimit             string  `json:"gasLimit"`
+	GasPrice             string  `json:"gasPrice,omitempty"`
+	MaxFeePerGas         string  `json:"maxFeePerGas,omitempty"`
+	MaxPriorityFeePerGas string  `json:"maxPriorityFeePerGas,omitempty"`
+	Nonce                int     `json:"nonce"`
+	Signature            string  `json:"signature"`
+}
+
+// TransferFilter represents filters for listing transfers.
+type TransferFilter struct {
+	Status      TransferStatus
+	SourceChain ChainID
+	TargetChain ChainID
+	Asset       string
+	Sender      string
+	Recipient   string
+	FromDate    *time.Time
+	ToDate      *time.Time
+	Limit       int
+	Offset      int
+}
+
+// LockOptions represents options for the lock operation.
+type LockOptions struct {
+	Recipient string
+	Deadline  int64
+	Slippage  float64
+}
+
+// MintOptions represents options for the mint operation.
+type MintOptions struct {
+	GasLimit             string
+	MaxFeePerGas         string
+	MaxPriorityFeePerGas string
+}
+
+// BurnOptions represents options for the burn operation.
+type BurnOptions struct {
+	Recipient string
+	Deadline  int64
+}
+
+// UnlockOptions represents options for the unlock operation.
+type UnlockOptions struct {
+	GasLimit string
+	GasPrice string
+}
+
+// Config represents the bridge client configuration.
+type Config struct {
+	APIKey   string
+	Endpoint string
+	Timeout  time.Duration
+	Retries  int
+	Debug    bool
+}
+
+// DefaultEndpoint is the default bridge API endpoint.
+const DefaultEndpoint = "https://bridge.synor.io/v1"
+
+// DefaultConfig returns a configuration with default values.
+func DefaultConfig(apiKey string) Config {
+	return Config{
+		APIKey:   apiKey,
+		Endpoint: DefaultEndpoint,
+		Timeout:  60 * time.Second,
+		Retries:  3,
+		Debug:    false,
+	}
+}

sdk/go/database/client.go

@@ -0,0 +1,658 @@
+package database
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"strconv"
+	"time"
+)
+
+// Client is the Synor Database SDK client
+type Client struct {
+	config     Config
+	httpClient *http.Client
+	closed     bool
+
+	// Stores
+	KV         *KeyValueStore
+	Documents  *DocumentStore
+	Vectors    *VectorStore
+	TimeSeries *TimeSeriesStore
+}
+
+// New creates a new Database client
+func New(config Config) *Client {
+	if config.Endpoint == "" {
+		config.Endpoint = "https://database.synor.io/v1"
+	}
+	if config.Timeout == 0 {
+		config.Timeout = 30 * time.Second
+	}
+	if config.Retries == 0 {
+		config.Retries = 3
+	}
+
+	client := &Client{
+		config: config,
+		httpClient: &http.Client{
+			Timeout: config.Timeout,
+		},
+	}
+
+	client.KV = &KeyValueStore{client: client}
+	client.Documents = &DocumentStore{client: client}
+	client.Vectors = &VectorStore{client: client}
+	client.TimeSeries = &TimeSeriesStore{client: client}
+
+	return client
+}
+
+// GetStats returns database statistics
+func (c *Client) GetStats(ctx context.Context) (*DatabaseStats, error) {
+	var stats DatabaseStats
+	err := c.request(ctx, "GET", "/stats", nil, &stats)
+	if err != nil {
+		return nil, err
+	}
+	return &stats, nil
+}
+
+// HealthCheck performs a health check
+func (c *Client) HealthCheck(ctx context.Context) bool {
+	var result struct {
+		Status string `json:"status"`
+	}
+	err := c.request(ctx, "GET", "/health", nil, &result)
+	return err == nil && result.Status == "healthy"
+}
+
+// Close closes the client
+func (c *Client) Close() {
+	c.closed = true
+}
+
+// IsClosed returns whether the client is closed
+func (c *Client) IsClosed() bool {
+	return c.closed
+}
+
+func (c *Client) request(ctx context.Context, method, path string, body interface{}, result interface{}) error {
+	if c.closed {
+		return NewDatabaseError("Client has been closed", "CLIENT_CLOSED", 0)
+	}
+
+	var lastErr error
+
+	for attempt := 0; attempt < c.config.Retries; attempt++ {
+		err := c.doRequest(ctx, method, path, body, result)
+		if err == nil {
+			return nil
+		}
+
+		lastErr = err
+		if c.config.Debug {
+			fmt.Printf("Attempt %d failed: %v\n", attempt+1, err)
+		}
+
+		if attempt < c.config.Retries-1 {
+			time.Sleep(time.Duration(attempt+1) * time.Second)
+		}
+	}
+
+	return lastErr
+}
+
+func (c *Client) doRequest(ctx context.Context, method, path string, body interface{}, result interface{}) error {
+	var bodyReader io.Reader
+	if body != nil {
+		jsonBody, err := json.Marshal(body)
+		if err != nil {
+			return err
+		}
+		bodyReader = bytes.NewReader(jsonBody)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, method, c.config.Endpoint+path, bodyReader)
+	if err != nil {
+		return err
+	}
+
+	req.Header.Set("Authorization", "Bearer "+c.config.APIKey)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-SDK-Version", "go/0.1.0")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+
+	if resp.StatusCode >= 400 {
+		var errResp struct {
+			Message string `json:"message"`
+			Error   string `json:"error"`
+			Code    string `json:"code"`
+		}
+		json.Unmarshal(respBody, &errResp)
+
+		msg := errResp.Message
+		if msg == "" {
+			msg = errResp.Error
+		}
+		if msg == "" {
+			msg = fmt.Sprintf("HTTP %d", resp.StatusCode)
+		}
+
+		return NewDatabaseError(msg, errResp.Code, resp.StatusCode)
+	}
+
+	if result != nil && len(respBody) > 0 {
+		return json.Unmarshal(respBody, result)
+	}
+
+	return nil
+}
+
+// ==================== Key-Value Store ====================
+
+// KeyValueStore provides key-value operations
+type KeyValueStore struct {
+	client *Client
+}
+
+// Get retrieves a value by key
+func (kv *KeyValueStore) Get(ctx context.Context, key string) (interface{}, error) {
+	var result struct {
+		Value interface{} `json:"value"`
+	}
+	err := kv.client.request(ctx, "GET", "/kv/"+url.PathEscape(key), nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return result.Value, nil
+}
+
+// GetEntry retrieves a full entry with metadata
+func (kv *KeyValueStore) GetEntry(ctx context.Context, key string) (*KeyValueEntry, error) {
+	var entry KeyValueEntry
+	err := kv.client.request(ctx, "GET", "/kv/"+url.PathEscape(key)+"/entry", nil, &entry)
+	if err != nil {
+		return nil, err
+	}
+	return &entry, nil
+}
+
+// Set sets a value
+func (kv *KeyValueStore) Set(ctx context.Context, key string, value interface{}, opts *SetOptions) error {
+	body := map[string]interface{}{
+		"value": value,
+	}
+	if opts != nil {
+		if opts.TTL != nil {
+			body["ttl"] = *opts.TTL
+		}
+		if opts.Metadata != nil {
+			body["metadata"] = opts.Metadata
+		}
+		if opts.IfNotExists {
+			body["if_not_exists"] = true
+		}
+		if opts.IfExists {
+			body["if_exists"] = true
+		}
+	}
+	return kv.client.request(ctx, "PUT", "/kv/"+url.PathEscape(key), body, nil)
+}
+
+// Delete deletes a key
+func (kv *KeyValueStore) Delete(ctx context.Context, key string) (bool, error) {
+	var result struct {
+		Deleted bool `json:"deleted"`
+	}
+	err := kv.client.request(ctx, "DELETE", "/kv/"+url.PathEscape(key), nil, &result)
+	if err != nil {
+		return false, err
+	}
+	return result.Deleted, nil
+}
+
+// Exists checks if a key exists
+func (kv *KeyValueStore) Exists(ctx context.Context, key string) (bool, error) {
+	var result struct {
+		Exists bool `json:"exists"`
+	}
+	err := kv.client.request(ctx, "GET", "/kv/"+url.PathEscape(key)+"/exists", nil, &result)
+	if err != nil {
+		return false, err
+	}
+	return result.Exists, nil
+}
+
+// List lists keys with optional prefix filtering
+func (kv *KeyValueStore) List(ctx context.Context, opts *ListOptions) (*ListResult, error) {
+	params := url.Values{}
+	if opts != nil {
+		if opts.Prefix != "" {
+			params.Set("prefix", opts.Prefix)
+		}
+		if opts.Cursor != "" {
+			params.Set("cursor", opts.Cursor)
+		}
+		if opts.Limit > 0 {
+			params.Set("limit", strconv.Itoa(opts.Limit))
+		}
+	}
+
+	path := "/kv"
+	if len(params) > 0 {
+		path += "?" + params.Encode()
+	}
+
+	var result ListResult
+	err := kv.client.request(ctx, "GET", path, nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// MGet retrieves multiple values at once
+func (kv *KeyValueStore) MGet(ctx context.Context, keys []string) (map[string]interface{}, error) {
+	var result struct {
+		Entries []struct {
+			Key   string      `json:"key"`
+			Value interface{} `json:"value"`
+		} `json:"entries"`
+	}
+	err := kv.client.request(ctx, "POST", "/kv/mget", map[string]interface{}{"keys": keys}, &result)
+	if err != nil {
+		return nil, err
+	}
+
+	values := make(map[string]interface{})
+	for _, e := range result.Entries {
+		values[e.Key] = e.Value
+	}
+	return values, nil
+}
+
+// MSet sets multiple values at once
+func (kv *KeyValueStore) MSet(ctx context.Context, entries map[string]interface{}) error {
+	entriesList := make([]map[string]interface{}, 0, len(entries))
+	for k, v := range entries {
+		entriesList = append(entriesList, map[string]interface{}{"key": k, "value": v})
+	}
+	return kv.client.request(ctx, "POST", "/kv/mset", map[string]interface{}{"entries": entriesList}, nil)
+}
+
+// Incr increments a numeric value
+func (kv *KeyValueStore) Incr(ctx context.Context, key string, by int64) (int64, error) {
+	var result struct {
+		Value int64 `json:"value"`
+	}
+	err := kv.client.request(ctx, "POST", "/kv/"+url.PathEscape(key)+"/incr", map[string]interface{}{"by": by}, &result)
+	if err != nil {
+		return 0, err
+	}
+	return result.Value, nil
+}
+
+// ==================== Document Store ====================
+
+// DocumentStore provides document operations
+type DocumentStore struct {
+	client *Client
+}
+
+// Create creates a new document
+func (ds *DocumentStore) Create(ctx context.Context, collection string, data map[string]interface{}, opts *CreateDocumentOptions) (*Document, error) {
+	body := map[string]interface{}{
+		"data": data,
+	}
+	if opts != nil {
+		if opts.ID != "" {
+			body["id"] = opts.ID
+		}
+		if opts.Metadata != nil {
+			body["metadata"] = opts.Metadata
+		}
+	}
+
+	var doc Document
+	err := ds.client.request(ctx, "POST", "/documents/"+url.PathEscape(collection), body, &doc)
+	if err != nil {
+		return nil, err
+	}
+	return &doc, nil
+}
+
+// Get retrieves a document by ID
+func (ds *DocumentStore) Get(ctx context.Context, collection, id string) (*Document, error) {
+	var doc Document
+	err := ds.client.request(ctx, "GET", "/documents/"+url.PathEscape(collection)+"/"+url.PathEscape(id), nil, &doc)
+	if err != nil {
+		return nil, err
+	}
+	return &doc, nil
+}
+
+// Update updates a document
+func (ds *DocumentStore) Update(ctx context.Context, collection, id string, update map[string]interface{}, opts *UpdateDocumentOptions) (*Document, error) {
+	body := map[string]interface{}{
+		"update": update,
+	}
+	if opts != nil {
+		if opts.Upsert {
+			body["upsert"] = true
+		}
+		if opts.ReturnDocument != "" {
+			body["return_document"] = opts.ReturnDocument
+		}
+	}
+
+	var doc Document
+	err := ds.client.request(ctx, "PATCH", "/documents/"+url.PathEscape(collection)+"/"+url.PathEscape(id), body, &doc)
+	if err != nil {
+		return nil, err
+	}
+	return &doc, nil
+}
+
+// Delete deletes a document
+func (ds *DocumentStore) Delete(ctx context.Context, collection, id string) (bool, error) {
+	var result struct {
+		Deleted bool `json:"deleted"`
+	}
+	err := ds.client.request(ctx, "DELETE", "/documents/"+url.PathEscape(collection)+"/"+url.PathEscape(id), nil, &result)
+	if err != nil {
+		return false, err
+	}
+	return result.Deleted, nil
+}
+
+// Query queries documents
+func (ds *DocumentStore) Query(ctx context.Context, collection string, opts *QueryOptions) (*QueryResult, error) {
+	body := make(map[string]interface{})
+	if opts != nil {
+		if opts.Filter != nil {
+			body["filter"] = opts.Filter
+		}
+		if opts.Sort != nil {
+			body["sort"] = opts.Sort
+		}
+		if opts.Skip > 0 {
+			body["skip"] = opts.Skip
+		}
+		if opts.Limit > 0 {
+			body["limit"] = opts.Limit
+		}
+		if opts.Projection != nil {
+			body["projection"] = opts.Projection
+		}
+	}
+
+	var result QueryResult
+	err := ds.client.request(ctx, "POST", "/documents/"+url.PathEscape(collection)+"/query", body, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// Count counts documents matching a filter
+func (ds *DocumentStore) Count(ctx context.Context, collection string, filter QueryFilter) (int, error) {
+	var result struct {
+		Count int `json:"count"`
+	}
+	err := ds.client.request(ctx, "POST", "/documents/"+url.PathEscape(collection)+"/count", map[string]interface{}{"filter": filter}, &result)
+	if err != nil {
+		return 0, err
+	}
+	return result.Count, nil
+}
+
+// Aggregate runs an aggregation pipeline
+func (ds *DocumentStore) Aggregate(ctx context.Context, collection string, pipeline []AggregateStage) ([]interface{}, error) {
+	var result struct {
+		Results []interface{} `json:"results"`
+	}
+	err := ds.client.request(ctx, "POST", "/documents/"+url.PathEscape(collection)+"/aggregate", map[string]interface{}{"pipeline": pipeline}, &result)
+	if err != nil {
+		return nil, err
+	}
+	return result.Results, nil
+}
+
+// ==================== Vector Store ====================
+
+// VectorStore provides vector operations
+type VectorStore struct {
+	client *Client
+}
+
+// CreateCollection creates a vector collection
+func (vs *VectorStore) CreateCollection(ctx context.Context, config VectorCollectionConfig) error {
+	return vs.client.request(ctx, "POST", "/vectors/collections", config, nil)
+}
+
+// DeleteCollection deletes a vector collection
+func (vs *VectorStore) DeleteCollection(ctx context.Context, name string) error {
+	return vs.client.request(ctx, "DELETE", "/vectors/collections/"+url.PathEscape(name), nil, nil)
+}
+
+// GetCollectionStats gets collection statistics
+func (vs *VectorStore) GetCollectionStats(ctx context.Context, name string) (*VectorCollectionStats, error) {
+	var stats VectorCollectionStats
+	err := vs.client.request(ctx, "GET", "/vectors/collections/"+url.PathEscape(name)+"/stats", nil, &stats)
+	if err != nil {
+		return nil, err
+	}
+	return &stats, nil
+}
+
+// Upsert upserts vectors
+func (vs *VectorStore) Upsert(ctx context.Context, collection string, vectors []VectorEntry, opts *UpsertVectorOptions) (int, error) {
+	body := map[string]interface{}{
+		"vectors": vectors,
+	}
+	if opts != nil && opts.Namespace != "" {
+		body["namespace"] = opts.Namespace
+	}
+
+	var result struct {
+		Upserted int `json:"upserted"`
+	}
+	err := vs.client.request(ctx, "POST", "/vectors/"+url.PathEscape(collection)+"/upsert", body, &result)
+	if err != nil {
+		return 0, err
+	}
+	return result.Upserted, nil
+}
+
+// Search searches for similar vectors
+func (vs *VectorStore) Search(ctx context.Context, collection string, vector []float64, opts *SearchOptions) ([]SearchResult, error) {
+	body := map[string]interface{}{
+		"vector": vector,
+	}
+	if opts != nil {
+		if opts.Namespace != "" {
+			body["namespace"] = opts.Namespace
+		}
+		if opts.TopK > 0 {
+			body["top_k"] = opts.TopK
+		}
+		if opts.Filter != nil {
+			body["filter"] = opts.Filter
+		}
+		body["include_metadata"] = opts.IncludeMetadata
+		body["include_vectors"] = opts.IncludeVectors
+		if opts.MinScore != nil {
+			body["min_score"] = *opts.MinScore
+		}
+	}
+
+	var result struct {
+		Results []SearchResult `json:"results"`
+	}
+	err := vs.client.request(ctx, "POST", "/vectors/"+url.PathEscape(collection)+"/search", body, &result)
+	if err != nil {
+		return nil, err
+	}
+	return result.Results, nil
+}
+
+// Delete deletes vectors by ID
+func (vs *VectorStore) Delete(ctx context.Context, collection string, ids []string, namespace string) (int, error) {
+	body := map[string]interface{}{
+		"ids": ids,
+	}
+	if namespace != "" {
+		body["namespace"] = namespace
+	}
+
+	var result struct {
+		Deleted int `json:"deleted"`
+	}
+	err := vs.client.request(ctx, "POST", "/vectors/"+url.PathEscape(collection)+"/delete", body, &result)
+	if err != nil {
+		return 0, err
+	}
+	return result.Deleted, nil
+}
+
+// Fetch fetches vectors by ID
+func (vs *VectorStore) Fetch(ctx context.Context, collection string, ids []string, namespace string) ([]VectorEntry, error) {
+	body := map[string]interface{}{
+		"ids": ids,
+	}
+	if namespace != "" {
+		body["namespace"] = namespace
+	}
+
+	var result struct {
+		Vectors []VectorEntry `json:"vectors"`
+	}
+	err := vs.client.request(ctx, "POST", "/vectors/"+url.PathEscape(collection)+"/fetch", body, &result)
+	if err != nil {
+		return nil, err
+	}
+	return result.Vectors, nil
+}
+
+// ==================== Time Series Store ====================
+
+// TimeSeriesStore provides time series operations
+type TimeSeriesStore struct {
+	client *Client
+}
+
+// Write writes data points to a series
+func (ts *TimeSeriesStore) Write(ctx context.Context, series string, points []DataPoint, opts *WritePointsOptions) (int, error) {
+	body := map[string]interface{}{
+		"points": points,
+	}
+	if opts != nil && opts.Precision != "" {
+		body["precision"] = opts.Precision
+	}
+
+	var result struct {
+		Written int `json:"written"`
+	}
+	err := ts.client.request(ctx, "POST", "/timeseries/"+url.PathEscape(series)+"/write", body, &result)
+	if err != nil {
+		return 0, err
+	}
+	return result.Written, nil
+}
+
+// Query queries a time series
+func (ts *TimeSeriesStore) Query(ctx context.Context, series string, timeRange TimeRange, opts *TimeSeriesQueryOptions) (*TimeSeriesResult, error) {
+	body := map[string]interface{}{
+		"range": timeRange,
+	}
+	if opts != nil {
+		if opts.Tags != nil {
+			body["tags"] = opts.Tags
+		}
+		if opts.Aggregation != "" {
+			body["aggregation"] = opts.Aggregation
+		}
+		if opts.Interval != "" {
+			body["interval"] = opts.Interval
+		}
+		if opts.Fill != nil {
+			body["fill"] = opts.Fill
+		}
+		if opts.Limit > 0 {
+			body["limit"] = opts.Limit
+		}
+	}
+
+	var result TimeSeriesResult
+	err := ts.client.request(ctx, "POST", "/timeseries/"+url.PathEscape(series)+"/query", body, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// Delete deletes data points in a range
+func (ts *TimeSeriesStore) Delete(ctx context.Context, series string, timeRange TimeRange, tags map[string]string) (int, error) {
+	body := map[string]interface{}{
+		"range": timeRange,
+	}
+	if tags != nil {
+		body["tags"] = tags
+	}
+
+	var result struct {
+		Deleted int `json:"deleted"`
+	}
+	err := ts.client.request(ctx, "POST", "/timeseries/"+url.PathEscape(series)+"/delete", body, &result)
+	if err != nil {
+		return 0, err
+	}
+	return result.Deleted, nil
+}
+
+// GetSeriesInfo gets series information
+func (ts *TimeSeriesStore) GetSeriesInfo(ctx context.Context, series string) (*SeriesInfo, error) {
+	var info SeriesInfo
+	err := ts.client.request(ctx, "GET", "/timeseries/"+url.PathEscape(series)+"/info", nil, &info)
+	if err != nil {
+		return nil, err
+	}
+	return &info, nil
+}
+
+// ListSeries lists all series
+func (ts *TimeSeriesStore) ListSeries(ctx context.Context, prefix string) ([]SeriesInfo, error) {
+	path := "/timeseries"
+	if prefix != "" {
+		path += "?prefix=" + url.QueryEscape(prefix)
+	}
+
+	var result struct {
+		Series []SeriesInfo `json:"series"`
+	}
+	err := ts.client.request(ctx, "GET", path, nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return result.Series, nil
+}
+
+// SetRetention sets retention policy for a series
+func (ts *TimeSeriesStore) SetRetention(ctx context.Context, series string, retentionDays int) error {
+	return ts.client.request(ctx, "PUT", "/timeseries/"+url.PathEscape(series)+"/retention", map[string]interface{}{"retention_days": retentionDays}, nil)
+}

sdk/go/database/types.go

@@ -0,0 +1,278 @@
+// Package database provides the Synor Database SDK for Go.
+// Multi-model database: Key-Value, Document, Vector, and Time Series.
+package database
+
+import (
+	"time"
+)
+
+// Network represents the network environment
+type Network string
+
+const (
+	NetworkMainnet Network = "mainnet"
+	NetworkTestnet Network = "testnet"
+	NetworkDevnet  Network = "devnet"
+)
+
+// Config represents the database client configuration
+type Config struct {
+	APIKey   string
+	Endpoint string
+	Network  Network
+	Timeout  time.Duration
+	Retries  int
+	Debug    bool
+}
+
+// DefaultConfig returns the default configuration
+func DefaultConfig(apiKey string) Config {
+	return Config{
+		APIKey:   apiKey,
+		Endpoint: "https://database.synor.io/v1",
+		Network:  NetworkMainnet,
+		Timeout:  30 * time.Second,
+		Retries:  3,
+		Debug:    false,
+	}
+}
+
+// ==================== Key-Value Types ====================
+
+// KeyValueEntry represents a key-value entry with metadata
+type KeyValueEntry struct {
+	Key       string            `json:"key"`
+	Value     interface{}       `json:"value"`
+	Metadata  map[string]string `json:"metadata,omitempty"`
+	ExpiresAt *int64            `json:"expires_at,omitempty"`
+	CreatedAt int64             `json:"created_at"`
+	UpdatedAt int64             `json:"updated_at"`
+}
+
+// SetOptions represents options for setting a key-value pair
+type SetOptions struct {
+	TTL         *int              `json:"ttl,omitempty"`
+	Metadata    map[string]string `json:"metadata,omitempty"`
+	IfNotExists bool              `json:"if_not_exists,omitempty"`
+	IfExists    bool              `json:"if_exists,omitempty"`
+}
+
+// ListOptions represents options for listing keys
+type ListOptions struct {
+	Prefix string `json:"prefix,omitempty"`
+	Cursor string `json:"cursor,omitempty"`
+	Limit  int    `json:"limit,omitempty"`
+}
+
+// ListResult represents the result of listing keys
+type ListResult struct {
+	Entries []KeyValueEntry `json:"entries"`
+	Cursor  string          `json:"cursor,omitempty"`
+	HasMore bool            `json:"has_more"`
+}
+
+// ==================== Document Store Types ====================
+
+// Document represents a document with metadata
+type Document struct {
+	ID        string                 `json:"id"`
+	Data      map[string]interface{} `json:"data"`
+	Metadata  map[string]string      `json:"metadata,omitempty"`
+	CreatedAt int64                  `json:"created_at"`
+	UpdatedAt int64                  `json:"updated_at"`
+	Version   int                    `json:"version"`
+}
+
+// CreateDocumentOptions represents options for creating a document
+type CreateDocumentOptions struct {
+	ID       string            `json:"id,omitempty"`
+	Metadata map[string]string `json:"metadata,omitempty"`
+}
+
+// UpdateDocumentOptions represents options for updating a document
+type UpdateDocumentOptions struct {
+	Upsert         bool   `json:"upsert,omitempty"`
+	ReturnDocument string `json:"return_document,omitempty"` // "before" or "after"
+}
+
+// QueryFilter represents a query filter
+type QueryFilter map[string]interface{}
+
+// SortOrder represents a sort order
+type SortOrder string
+
+const (
+	SortAsc  SortOrder = "asc"
+	SortDesc SortOrder = "desc"
+)
+
+// QueryOptions represents options for querying documents
+type QueryOptions struct {
+	Filter     QueryFilter          `json:"filter,omitempty"`
+	Sort       map[string]SortOrder `json:"sort,omitempty"`
+	Skip       int                  `json:"skip,omitempty"`
+	Limit      int                  `json:"limit,omitempty"`
+	Projection []string             `json:"projection,omitempty"`
+}
+
+// QueryResult represents the result of a document query
+type QueryResult struct {
+	Documents []Document `json:"documents"`
+	Total     int        `json:"total"`
+	HasMore   bool       `json:"has_more"`
+}
+
+// AggregateStage represents a stage in an aggregation pipeline
+type AggregateStage map[string]interface{}
+
+// ==================== Vector Store Types ====================
+
+// VectorEntry represents a vector entry
+type VectorEntry struct {
+	ID       string                 `json:"id"`
+	Vector   []float64              `json:"vector"`
+	Metadata map[string]interface{} `json:"metadata,omitempty"`
+	Content  string                 `json:"content,omitempty"`
+}
+
+// DistanceMetric represents a vector distance metric
+type DistanceMetric string
+
+const (
+	DistanceCosine     DistanceMetric = "cosine"
+	DistanceEuclidean  DistanceMetric = "euclidean"
+	DistanceDotProduct DistanceMetric = "dotProduct"
+)
+
+// UpsertVectorOptions represents options for upserting vectors
+type UpsertVectorOptions struct {
+	Namespace string `json:"namespace,omitempty"`
+}
+
+// SearchOptions represents options for vector search
+type SearchOptions struct {
+	Namespace       string      `json:"namespace,omitempty"`
+	TopK            int         `json:"top_k,omitempty"`
+	Filter          QueryFilter `json:"filter,omitempty"`
+	IncludeMetadata bool        `json:"include_metadata,omitempty"`
+	IncludeVectors  bool        `json:"include_vectors,omitempty"`
+	MinScore        *float64    `json:"min_score,omitempty"`
+}
+
+// SearchResult represents a vector search result
+type SearchResult struct {
+	ID       string                 `json:"id"`
+	Score    float64                `json:"score"`
+	Vector   []float64              `json:"vector,omitempty"`
+	Metadata map[string]interface{} `json:"metadata,omitempty"`
+	Content  string                 `json:"content,omitempty"`
+}
+
+// VectorCollectionConfig represents configuration for a vector collection
+type VectorCollectionConfig struct {
+	Name      string         `json:"name"`
+	Dimension int            `json:"dimension"`
+	Metric    DistanceMetric `json:"metric,omitempty"`
+	IndexType string         `json:"index_type,omitempty"`
+}
+
+// VectorCollectionStats represents statistics for a vector collection
+type VectorCollectionStats struct {
+	Name        string `json:"name"`
+	VectorCount int    `json:"vector_count"`
+	Dimension   int    `json:"dimension"`
+	IndexSize   int64  `json:"index_size"`
+}
+
+// ==================== Time Series Types ====================
+
+// DataPoint represents a time series data point
+type DataPoint struct {
+	Timestamp int64             `json:"timestamp"`
+	Value     float64           `json:"value"`
+	Tags      map[string]string `json:"tags,omitempty"`
+}
+
+// WritePointsOptions represents options for writing data points
+type WritePointsOptions struct {
+	Precision string `json:"precision,omitempty"` // "ns", "us", "ms", "s"
+}
+
+// Aggregation represents a time series aggregation function
+type Aggregation string
+
+const (
+	AggMean     Aggregation = "mean"
+	AggSum      Aggregation = "sum"
+	AggCount    Aggregation = "count"
+	AggMin      Aggregation = "min"
+	AggMax      Aggregation = "max"
+	AggFirst    Aggregation = "first"
+	AggLast     Aggregation = "last"
+	AggStddev   Aggregation = "stddev"
+	AggVariance Aggregation = "variance"
+)
+
+// TimeRange represents a time range for queries
+type TimeRange struct {
+	Start interface{} `json:"start"` // int64, time.Time, or string
+	End   interface{} `json:"end"`   // int64, time.Time, or string
+}
+
+// TimeSeriesQueryOptions represents options for time series queries
+type TimeSeriesQueryOptions struct {
+	Tags        map[string]string `json:"tags,omitempty"`
+	Aggregation Aggregation       `json:"aggregation,omitempty"`
+	Interval    string            `json:"interval,omitempty"` // e.g., "1m", "5m", "1h"
+	Fill        interface{}       `json:"fill,omitempty"`     // "none", "null", "previous", or number
+	Limit       int               `json:"limit,omitempty"`
+}
+
+// TimeSeriesResult represents the result of a time series query
+type TimeSeriesResult struct {
+	Series     string            `json:"series"`
+	Points     []DataPoint       `json:"points"`
+	Statistics map[string]float64 `json:"statistics,omitempty"`
+}
+
+// SeriesInfo represents information about a time series
+type SeriesInfo struct {
+	Name          string   `json:"name"`
+	Tags          []string `json:"tags"`
+	RetentionDays int      `json:"retention_days"`
+	PointCount    int64    `json:"point_count"`
+}
+
+// ==================== Database Stats ====================
+
+// DatabaseStats represents overall database statistics
+type DatabaseStats struct {
+	KVEntries        int   `json:"kv_entries"`
+	DocumentCount    int   `json:"document_count"`
+	VectorCount      int   `json:"vector_count"`
+	TimeseriesPoints int64 `json:"timeseries_points"`
+	StorageUsed      int64 `json:"storage_used"`
+	StorageLimit     int64 `json:"storage_limit"`
+}
+
+// ==================== Errors ====================
+
+// DatabaseError represents a database error
+type DatabaseError struct {
+	Message    string
+	Code       string
+	StatusCode int
+}
+
+func (e *DatabaseError) Error() string {
+	return e.Message
+}
+
+// NewDatabaseError creates a new DatabaseError
+func NewDatabaseError(message string, code string, statusCode int) *DatabaseError {
+	return &DatabaseError{
+		Message:    message,
+		Code:       code,
+		StatusCode: statusCode,
+	}
+}

sdk/go/hosting/client.go

@@ -0,0 +1,470 @@
+package hosting
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"time"
+)
+
+// Client is the Synor Hosting SDK client
+type Client struct {
+	config     Config
+	httpClient *http.Client
+	closed     bool
+}
+
+// New creates a new Hosting client
+func New(config Config) *Client {
+	if config.Endpoint == "" {
+		config.Endpoint = "https://hosting.synor.io/v1"
+	}
+	if config.Timeout == 0 {
+		config.Timeout = 60 * time.Second
+	}
+	if config.Retries == 0 {
+		config.Retries = 3
+	}
+
+	return &Client{
+		config: config,
+		httpClient: &http.Client{
+			Timeout: config.Timeout,
+		},
+	}
+}
+
+// ==================== Domain Operations ====================
+
+// CheckAvailability checks domain availability
+func (c *Client) CheckAvailability(ctx context.Context, name string) (*DomainAvailability, error) {
+	var result DomainAvailability
+	err := c.request(ctx, "GET", "/domains/check/"+url.PathEscape(name), nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// RegisterDomain registers a new domain
+func (c *Client) RegisterDomain(ctx context.Context, name string, opts *RegisterDomainOptions) (*Domain, error) {
+	body := map[string]interface{}{
+		"name": name,
+	}
+	if opts != nil {
+		if opts.Years > 0 {
+			body["years"] = opts.Years
+		}
+		body["auto_renew"] = opts.AutoRenew
+		if opts.Records != nil {
+			body["records"] = opts.Records
+		}
+	}
+
+	var result Domain
+	err := c.request(ctx, "POST", "/domains", body, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// GetDomain gets domain information
+func (c *Client) GetDomain(ctx context.Context, name string) (*Domain, error) {
+	var result Domain
+	err := c.request(ctx, "GET", "/domains/"+url.PathEscape(name), nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// ListDomains lists all domains
+func (c *Client) ListDomains(ctx context.Context) ([]Domain, error) {
+	var result struct {
+		Domains []Domain `json:"domains"`
+	}
+	err := c.request(ctx, "GET", "/domains", nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return result.Domains, nil
+}
+
+// UpdateDomainRecord updates domain record
+func (c *Client) UpdateDomainRecord(ctx context.Context, name string, record *DomainRecord) (*Domain, error) {
+	var result Domain
+	err := c.request(ctx, "PUT", "/domains/"+url.PathEscape(name)+"/record", record, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// ResolveDomain resolves a domain
+func (c *Client) ResolveDomain(ctx context.Context, name string) (*DomainRecord, error) {
+	var result DomainRecord
+	err := c.request(ctx, "GET", "/domains/"+url.PathEscape(name)+"/resolve", nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// RenewDomain renews a domain
+func (c *Client) RenewDomain(ctx context.Context, name string, years int) (*Domain, error) {
+	var result Domain
+	err := c.request(ctx, "POST", "/domains/"+url.PathEscape(name)+"/renew", map[string]interface{}{"years": years}, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// ==================== DNS Operations ====================
+
+// GetDnsZone gets DNS zone for a domain
+func (c *Client) GetDnsZone(ctx context.Context, domain string) (*DnsZone, error) {
+	var result DnsZone
+	err := c.request(ctx, "GET", "/dns/"+url.PathEscape(domain), nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// SetDnsRecords sets DNS records for a domain
+func (c *Client) SetDnsRecords(ctx context.Context, domain string, records []DnsRecord) (*DnsZone, error) {
+	var result DnsZone
+	err := c.request(ctx, "PUT", "/dns/"+url.PathEscape(domain), map[string]interface{}{"records": records}, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// AddDnsRecord adds a DNS record
+func (c *Client) AddDnsRecord(ctx context.Context, domain string, record DnsRecord) (*DnsZone, error) {
+	var result DnsZone
+	err := c.request(ctx, "POST", "/dns/"+url.PathEscape(domain)+"/records", record, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// DeleteDnsRecord deletes a DNS record
+func (c *Client) DeleteDnsRecord(ctx context.Context, domain, recordType, name string) (*DnsZone, error) {
+	var result DnsZone
+	path := fmt.Sprintf("/dns/%s/records/%s/%s", url.PathEscape(domain), recordType, url.PathEscape(name))
+	err := c.request(ctx, "DELETE", path, nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// ==================== Deployment Operations ====================
+
+// Deploy deploys a site from CID
+func (c *Client) Deploy(ctx context.Context, cid string, opts *DeployOptions) (*Deployment, error) {
+	body := map[string]interface{}{
+		"cid": cid,
+	}
+	if opts != nil {
+		if opts.Domain != "" {
+			body["domain"] = opts.Domain
+		}
+		if opts.Subdomain != "" {
+			body["subdomain"] = opts.Subdomain
+		}
+		if opts.Headers != nil {
+			body["headers"] = opts.Headers
+		}
+		if opts.Redirects != nil {
+			body["redirects"] = opts.Redirects
+		}
+		body["spa"] = opts.SPA
+		body["clean_urls"] = opts.CleanURLs
+		body["trailing_slash"] = opts.TrailingSlash
+	}
+
+	var result Deployment
+	err := c.request(ctx, "POST", "/deployments", body, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// GetDeployment gets deployment by ID
+func (c *Client) GetDeployment(ctx context.Context, id string) (*Deployment, error) {
+	var result Deployment
+	err := c.request(ctx, "GET", "/deployments/"+url.PathEscape(id), nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// ListDeployments lists deployments
+func (c *Client) ListDeployments(ctx context.Context, domain string) ([]Deployment, error) {
+	path := "/deployments"
+	if domain != "" {
+		path += "?domain=" + url.QueryEscape(domain)
+	}
+
+	var result struct {
+		Deployments []Deployment `json:"deployments"`
+	}
+	err := c.request(ctx, "GET", path, nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return result.Deployments, nil
+}
+
+// Rollback rolls back to a previous deployment
+func (c *Client) Rollback(ctx context.Context, domain, deploymentID string) (*Deployment, error) {
+	var result Deployment
+	err := c.request(ctx, "POST", "/deployments/"+url.PathEscape(deploymentID)+"/rollback", map[string]interface{}{"domain": domain}, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// DeleteDeployment deletes a deployment
+func (c *Client) DeleteDeployment(ctx context.Context, id string) error {
+	return c.request(ctx, "DELETE", "/deployments/"+url.PathEscape(id), nil, nil)
+}
+
+// GetDeploymentStats gets deployment stats
+func (c *Client) GetDeploymentStats(ctx context.Context, id, period string) (*DeploymentStats, error) {
+	path := fmt.Sprintf("/deployments/%s/stats?period=%s", url.PathEscape(id), url.QueryEscape(period))
+	var result DeploymentStats
+	err := c.request(ctx, "GET", path, nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// ==================== SSL Operations ====================
+
+// ProvisionSSL provisions SSL certificate
+func (c *Client) ProvisionSSL(ctx context.Context, domain string, opts *ProvisionSSLOptions) (*Certificate, error) {
+	body := make(map[string]interface{})
+	if opts != nil {
+		body["include_www"] = opts.IncludeWWW
+		body["auto_renew"] = opts.AutoRenew
+	}
+
+	var result Certificate
+	err := c.request(ctx, "POST", "/ssl/"+url.PathEscape(domain), body, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// GetCertificate gets certificate status
+func (c *Client) GetCertificate(ctx context.Context, domain string) (*Certificate, error) {
+	var result Certificate
+	err := c.request(ctx, "GET", "/ssl/"+url.PathEscape(domain), nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// RenewCertificate renews SSL certificate
+func (c *Client) RenewCertificate(ctx context.Context, domain string) (*Certificate, error) {
+	var result Certificate
+	err := c.request(ctx, "POST", "/ssl/"+url.PathEscape(domain)+"/renew", nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// DeleteCertificate deletes/revokes SSL certificate
+func (c *Client) DeleteCertificate(ctx context.Context, domain string) error {
+	return c.request(ctx, "DELETE", "/ssl/"+url.PathEscape(domain), nil, nil)
+}
+
+// ==================== Site Configuration ====================
+
+// GetSiteConfig gets site configuration
+func (c *Client) GetSiteConfig(ctx context.Context, domain string) (*SiteConfig, error) {
+	var result SiteConfig
+	err := c.request(ctx, "GET", "/sites/"+url.PathEscape(domain)+"/config", nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// UpdateSiteConfig updates site configuration
+func (c *Client) UpdateSiteConfig(ctx context.Context, domain string, config map[string]interface{}) (*SiteConfig, error) {
+	var result SiteConfig
+	err := c.request(ctx, "PATCH", "/sites/"+url.PathEscape(domain)+"/config", config, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// PurgeCache purges CDN cache
+func (c *Client) PurgeCache(ctx context.Context, domain string, paths []string) (int, error) {
+	body := make(map[string]interface{})
+	if paths != nil {
+		body["paths"] = paths
+	}
+
+	var result struct {
+		Purged int `json:"purged"`
+	}
+	err := c.request(ctx, "DELETE", "/sites/"+url.PathEscape(domain)+"/cache", body, &result)
+	if err != nil {
+		return 0, err
+	}
+	return result.Purged, nil
+}
+
+// ==================== Analytics ====================
+
+// GetAnalytics gets site analytics
+func (c *Client) GetAnalytics(ctx context.Context, domain string, opts *AnalyticsOptions) (*AnalyticsData, error) {
+	params := url.Values{}
+	if opts != nil {
+		if opts.Period != "" {
+			params.Set("period", opts.Period)
+		}
+		if opts.StartDate != "" {
+			params.Set("start", opts.StartDate)
+		}
+		if opts.EndDate != "" {
+			params.Set("end", opts.EndDate)
+		}
+	}
+
+	path := "/sites/" + url.PathEscape(domain) + "/analytics"
+	if len(params) > 0 {
+		path += "?" + params.Encode()
+	}
+
+	var result AnalyticsData
+	err := c.request(ctx, "GET", path, nil, &result)
+	if err != nil {
+		return nil, err
+	}
+	return &result, nil
+}
+
+// ==================== Lifecycle ====================
+
+// Close closes the client
+func (c *Client) Close() {
+	c.closed = true
+}
+
+// IsClosed returns whether the client is closed
+func (c *Client) IsClosed() bool {
+	return c.closed
+}
+
+// HealthCheck performs a health check
+func (c *Client) HealthCheck(ctx context.Context) bool {
+	var result struct {
+		Status string `json:"status"`
+	}
+	err := c.request(ctx, "GET", "/health", nil, &result)
+	return err == nil && result.Status == "healthy"
+}
+
+func (c *Client) request(ctx context.Context, method, path string, body interface{}, result interface{}) error {
+	if c.closed {
+		return NewHostingError("Client has been closed", "CLIENT_CLOSED", 0)
+	}
+
+	var lastErr error
+
+	for attempt := 0; attempt < c.config.Retries; attempt++ {
+		err := c.doRequest(ctx, method, path, body, result)
+		if err == nil {
+			return nil
+		}
+
+		lastErr = err
+		if c.config.Debug {
+			fmt.Printf("Attempt %d failed: %v\n", attempt+1, err)
+		}
+
+		if attempt < c.config.Retries-1 {
+			time.Sleep(time.Duration(attempt+1) * time.Second)
+		}
+	}
+
+	return lastErr
+}
+
+func (c *Client) doRequest(ctx context.Context, method, path string, body interface{}, result interface{}) error {
+	var bodyReader io.Reader
+	if body != nil {
+		jsonBody, err := json.Marshal(body)
+		if err != nil {
+			return err
+		}
+		bodyReader = bytes.NewReader(jsonBody)
+	}
+
+	req, err := http.NewRequestWithContext(ctx, method, c.config.Endpoint+path, bodyReader)
+	if err != nil {
+		return err
+	}
+
+	req.Header.Set("Authorization", "Bearer "+c.config.APIKey)
+	req.Header.Set("Content-Type", "application/json")
+	req.Header.Set("X-SDK-Version", "go/0.1.0")
+
+	resp, err := c.httpClient.Do(req)
+	if err != nil {
+		return err
+	}
+	defer resp.Body.Close()
+
+	respBody, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return err
+	}
+
+	if resp.StatusCode >= 400 {
+		var errResp struct {
+			Message string `json:"message"`
+			Error   string `json:"error"`
+			Code    string `json:"code"`
+		}
+		json.Unmarshal(respBody, &errResp)
+
+		msg := errResp.Message
+		if msg == "" {
+			msg = errResp.Error
+		}
+		if msg == "" {
+			msg = fmt.Sprintf("HTTP %d", resp.StatusCode)
+		}
+
+		return NewHostingError(msg, errResp.Code, resp.StatusCode)
+	}
+
+	if result != nil && len(respBody) > 0 {
+		return json.Unmarshal(respBody, result)
+	}
+
+	return nil
+}

sdk/go/hosting/types.go

@@ -0,0 +1,276 @@
+// Package hosting provides the Synor Hosting SDK for Go.
+// Decentralized web hosting with domain management, DNS, and deployments.
+package hosting
+
+import (
+	"time"
+)
+
+// Network represents the network environment
+type Network string
+
+const (
+	NetworkMainnet Network = "mainnet"
+	NetworkTestnet Network = "testnet"
+	NetworkDevnet  Network = "devnet"
+)
+
+// Config represents the hosting client configuration
+type Config struct {
+	APIKey   string
+	Endpoint string
+	Network  Network
+	Timeout  time.Duration
+	Retries  int
+	Debug    bool
+}
+
+// DefaultConfig returns the default configuration
+func DefaultConfig(apiKey string) Config {
+	return Config{
+		APIKey:   apiKey,
+		Endpoint: "https://hosting.synor.io/v1",
+		Network:  NetworkMainnet,
+		Timeout:  60 * time.Second,
+		Retries:  3,
+		Debug:    false,
+	}
+}
+
+// ==================== Domain Types ====================
+
+// DomainStatus represents a domain status
+type DomainStatus string
+
+const (
+	DomainStatusPending   DomainStatus = "pending"
+	DomainStatusActive    DomainStatus = "active"
+	DomainStatusExpired   DomainStatus = "expired"
+	DomainStatusSuspended DomainStatus = "suspended"
+)
+
+// Domain represents a domain
+type Domain struct {
+	Name         string            `json:"name"`
+	Status       DomainStatus      `json:"status"`
+	Owner        string            `json:"owner"`
+	RegisteredAt int64             `json:"registered_at"`
+	ExpiresAt    int64             `json:"expires_at"`
+	AutoRenew    bool              `json:"auto_renew"`
+	Records      *DomainRecord     `json:"records,omitempty"`
+}
+
+// DomainRecord represents a domain record for resolution
+type DomainRecord struct {
+	CID      string            `json:"cid,omitempty"`
+	IPv4     []string          `json:"ipv4,omitempty"`
+	IPv6     []string          `json:"ipv6,omitempty"`
+	CNAME    string            `json:"cname,omitempty"`
+	TXT      []string          `json:"txt,omitempty"`
+	Metadata map[string]string `json:"metadata,omitempty"`
+}
+
+// DomainAvailability represents domain availability check result
+type DomainAvailability struct {
+	Name      string   `json:"name"`
+	Available bool     `json:"available"`
+	Price     *float64 `json:"price,omitempty"`
+	Premium   bool     `json:"premium"`
+}
+
+// RegisterDomainOptions represents options for registering a domain
+type RegisterDomainOptions struct {
+	Years     int           `json:"years,omitempty"`
+	AutoRenew bool          `json:"auto_renew,omitempty"`
+	Records   *DomainRecord `json:"records,omitempty"`
+}
+
+// ==================== DNS Types ====================
+
+// DnsRecordType represents a DNS record type
+type DnsRecordType string
+
+const (
+	DnsRecordTypeA     DnsRecordType = "A"
+	DnsRecordTypeAAAA  DnsRecordType = "AAAA"
+	DnsRecordTypeCNAME DnsRecordType = "CNAME"
+	DnsRecordTypeTXT   DnsRecordType = "TXT"
+	DnsRecordTypeMX    DnsRecordType = "MX"
+	DnsRecordTypeNS    DnsRecordType = "NS"
+	DnsRecordTypeSRV   DnsRecordType = "SRV"
+	DnsRecordTypeCAA   DnsRecordType = "CAA"
+)
+
+// DnsRecord represents a DNS record
+type DnsRecord struct {
+	Type     DnsRecordType `json:"type"`
+	Name     string        `json:"name"`
+	Value    string        `json:"value"`
+	TTL      int           `json:"ttl,omitempty"`
+	Priority *int          `json:"priority,omitempty"`
+}
+
+// DnsZone represents a DNS zone
+type DnsZone struct {
+	Domain    string      `json:"domain"`
+	Records   []DnsRecord `json:"records"`
+	UpdatedAt int64       `json:"updated_at"`
+}
+
+// ==================== Deployment Types ====================
+
+// DeploymentStatus represents a deployment status
+type DeploymentStatus string
+
+const (
+	DeploymentStatusPending   DeploymentStatus = "pending"
+	DeploymentStatusBuilding  DeploymentStatus = "building"
+	DeploymentStatusDeploying DeploymentStatus = "deploying"
+	DeploymentStatusActive    DeploymentStatus = "active"
+	DeploymentStatusFailed    DeploymentStatus = "failed"
+	DeploymentStatusInactive  DeploymentStatus = "inactive"
+)
+
+// Deployment represents a deployment
+type Deployment struct {
+	ID           string           `json:"id"`
+	Domain       string           `json:"domain"`
+	CID          string           `json:"cid"`
+	Status       DeploymentStatus `json:"status"`
+	URL          string           `json:"url"`
+	CreatedAt    int64            `json:"created_at"`
+	UpdatedAt    int64            `json:"updated_at"`
+	BuildLogs    string           `json:"build_logs,omitempty"`
+	ErrorMessage string           `json:"error_message,omitempty"`
+}
+
+// RedirectRule represents a redirect rule
+type RedirectRule struct {
+	Source      string `json:"source"`
+	Destination string `json:"destination"`
+	StatusCode  int    `json:"status_code,omitempty"`
+	Permanent   bool   `json:"permanent,omitempty"`
+}
+
+// DeployOptions represents options for deploying a site
+type DeployOptions struct {
+	Domain        string            `json:"domain,omitempty"`
+	Subdomain     string            `json:"subdomain,omitempty"`
+	Headers       map[string]string `json:"headers,omitempty"`
+	Redirects     []RedirectRule    `json:"redirects,omitempty"`
+	SPA           bool              `json:"spa,omitempty"`
+	CleanURLs     bool              `json:"clean_urls,omitempty"`
+	TrailingSlash bool              `json:"trailing_slash,omitempty"`
+}
+
+// DeploymentStats represents deployment statistics
+type DeploymentStats struct {
+	Requests       int    `json:"requests"`
+	Bandwidth      int64  `json:"bandwidth"`
+	UniqueVisitors int    `json:"unique_visitors"`
+	Period         string `json:"period"`
+}
+
+// ==================== SSL Types ====================
+
+// CertificateStatus represents a certificate status
+type CertificateStatus string
+
+const (
+	CertificateStatusPending CertificateStatus = "pending"
+	CertificateStatusIssued  CertificateStatus = "issued"
+	CertificateStatusExpired CertificateStatus = "expired"
+	CertificateStatusRevoked CertificateStatus = "revoked"
+)
+
+// Certificate represents an SSL certificate
+type Certificate struct {
+	Domain      string            `json:"domain"`
+	Status      CertificateStatus `json:"status"`
+	AutoRenew   bool              `json:"auto_renew"`
+	Issuer      string            `json:"issuer"`
+	IssuedAt    *int64            `json:"issued_at,omitempty"`
+	ExpiresAt   *int64            `json:"expires_at,omitempty"`
+	Fingerprint string            `json:"fingerprint,omitempty"`
+}
+
+// ProvisionSSLOptions represents options for provisioning SSL
+type ProvisionSSLOptions struct {
+	IncludeWWW bool `json:"include_www,omitempty"`
+	AutoRenew  bool `json:"auto_renew,omitempty"`
+}
+
+// ==================== Site Configuration ====================
+
+// SiteConfig represents site configuration
+type SiteConfig struct {
+	Domain        string            `json:"domain"`
+	CID           string            `json:"cid,omitempty"`
+	Headers       map[string]string `json:"headers,omitempty"`
+	Redirects     []RedirectRule    `json:"redirects,omitempty"`
+	ErrorPages    map[string]string `json:"error_pages,omitempty"`
+	SPA           bool              `json:"spa"`
+	CleanURLs     bool              `json:"clean_urls"`
+	TrailingSlash bool              `json:"trailing_slash"`
+}
+
+// ==================== Analytics ====================
+
+// PageView represents page view data
+type PageView struct {
+	Path  string `json:"path"`
+	Views int    `json:"views"`
+}
+
+// Referrer represents referrer data
+type Referrer struct {
+	Referrer string `json:"referrer"`
+	Count    int    `json:"count"`
+}
+
+// Country represents country data
+type Country struct {
+	Country string `json:"country"`
+	Count   int    `json:"count"`
+}
+
+// AnalyticsData represents analytics data
+type AnalyticsData struct {
+	Domain         string     `json:"domain"`
+	Period         string     `json:"period"`
+	PageViews      int        `json:"page_views"`
+	UniqueVisitors int        `json:"unique_visitors"`
+	Bandwidth      int64      `json:"bandwidth"`
+	TopPages       []PageView `json:"top_pages"`
+	TopReferrers   []Referrer `json:"top_referrers"`
+	TopCountries   []Country  `json:"top_countries"`
+}
+
+// AnalyticsOptions represents options for analytics query
+type AnalyticsOptions struct {
+	Period    string `json:"period,omitempty"`
+	StartDate string `json:"start,omitempty"`
+	EndDate   string `json:"end,omitempty"`
+}
+
+// ==================== Errors ====================
+
+// HostingError represents a hosting error
+type HostingError struct {
+	Message    string
+	Code       string
+	StatusCode int
+}
+
+func (e *HostingError) Error() string {
+	return e.Message
+}
+
+// NewHostingError creates a new HostingError
+func NewHostingError(message string, code string, statusCode int) *HostingError {
+	return &HostingError{
+		Message:    message,
+		Code:       code,
+		StatusCode: statusCode,
+	}
+}

sdk/java/pom.xml

@@ -5,13 +5,13 @@
     <modelVersion>4.0.0</modelVersion>
 
     <groupId>io.synor</groupId>
-    <artifactId>synor-compute</artifactId>
+    <artifactId>synor-sdk</artifactId>
     <version>0.1.0</version>
     <packaging>jar</packaging>
 
-    <name>Synor Compute SDK</name>
-    <description>Java SDK for Synor Compute - Distributed Heterogeneous Computing</description>
-    <url>https://github.com/synor/synor-compute-java</url>
+    <name>Synor SDK</name>
+    <description>Java SDK for Synor - Compute, Wallet, RPC, and Storage</description>
+    <url>https://synor.cc</url>
 
     <licenses>
         <license>
@@ -48,6 +48,11 @@
             <artifactId>jackson-databind</artifactId>
             <version>${jackson.version}</version>
         </dependency>
+        <dependency>
+            <groupId>com.google.code.gson</groupId>
+            <artifactId>gson</artifactId>
+            <version>2.10.1</version>
+        </dependency>
 
         <!-- Testing -->
         <dependency>

sdk/java/src/main/java/io/synor/bridge/SynorBridge.java

@@ -0,0 +1,371 @@
+package io.synor.bridge;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+
+import java.lang.reflect.Type;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.Set;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Synor Bridge SDK for Java.
+ * Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+ */
+public class SynorBridge implements AutoCloseable {
+    private static final String DEFAULT_ENDPOINT = "https://bridge.synor.io/v1";
+    private static final Gson gson = new GsonBuilder().create();
+    private static final Set<TransferStatus> FINAL_STATUSES = Set.of(
+            TransferStatus.completed, TransferStatus.failed, TransferStatus.refunded
+    );
+
+    private final BridgeConfig config;
+    private final HttpClient httpClient;
+    private final AtomicBoolean closed = new AtomicBoolean(false);
+
+    public SynorBridge(String apiKey) {
+        this(new BridgeConfig(apiKey, DEFAULT_ENDPOINT, 60, 3, false));
+    }
+
+    public SynorBridge(BridgeConfig config) {
+        this.config = config;
+        this.httpClient = HttpClient.newBuilder()
+                .connectTimeout(Duration.ofSeconds(config.getTimeoutSecs()))
+                .build();
+    }
+
+    // ==================== Chain Operations ====================
+
+    public CompletableFuture<List<Chain>> getSupportedChains() {
+        return request("GET", "/chains", null)
+                .thenApply(resp -> {
+                    Type type = new TypeToken<ChainsResponse>(){}.getType();
+                    ChainsResponse result = gson.fromJson(resp, type);
+                    return result.chains;
+                });
+    }
+
+    public CompletableFuture<Chain> getChain(ChainId chainId) {
+        return request("GET", "/chains/" + chainId.name().toLowerCase(), null)
+                .thenApply(resp -> gson.fromJson(resp, Chain.class));
+    }
+
+    public CompletableFuture<Boolean> isChainSupported(ChainId chainId) {
+        return getChain(chainId)
+                .thenApply(Chain::isSupported)
+                .exceptionally(e -> false);
+    }
+
+    // ==================== Asset Operations ====================
+
+    public CompletableFuture<List<Asset>> getSupportedAssets(ChainId chainId) {
+        return request("GET", "/chains/" + chainId.name().toLowerCase() + "/assets", null)
+                .thenApply(resp -> {
+                    Type type = new TypeToken<AssetsResponse>(){}.getType();
+                    AssetsResponse result = gson.fromJson(resp, type);
+                    return result.assets;
+                });
+    }
+
+    public CompletableFuture<Asset> getAsset(String assetId) {
+        return request("GET", "/assets/" + encode(assetId), null)
+                .thenApply(resp -> gson.fromJson(resp, Asset.class));
+    }
+
+    public CompletableFuture<WrappedAsset> getWrappedAsset(String originalAssetId, ChainId targetChain) {
+        String path = "/assets/" + encode(originalAssetId) + "/wrapped/" + targetChain.name().toLowerCase();
+        return request("GET", path, null)
+                .thenApply(resp -> gson.fromJson(resp, WrappedAsset.class));
+    }
+
+    // ==================== Fee & Rate Operations ====================
+
+    public CompletableFuture<FeeEstimate> estimateFee(String asset, String amount, ChainId sourceChain, ChainId targetChain) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("asset", asset);
+        body.put("amount", amount);
+        body.put("sourceChain", sourceChain.name().toLowerCase());
+        body.put("targetChain", targetChain.name().toLowerCase());
+        return request("POST", "/fees/estimate", body)
+                .thenApply(resp -> gson.fromJson(resp, FeeEstimate.class));
+    }
+
+    public CompletableFuture<ExchangeRate> getExchangeRate(String fromAsset, String toAsset) {
+        String path = "/rates/" + encode(fromAsset) + "/" + encode(toAsset);
+        return request("GET", path, null)
+                .thenApply(resp -> gson.fromJson(resp, ExchangeRate.class));
+    }
+
+    // ==================== Lock-Mint Flow ====================
+
+    public CompletableFuture<LockReceipt> lock(String asset, String amount, ChainId targetChain, LockOptions options) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("asset", asset);
+        body.put("amount", amount);
+        body.put("targetChain", targetChain.name().toLowerCase());
+        if (options != null) {
+            if (options.getRecipient() != null) body.put("recipient", options.getRecipient());
+            if (options.getDeadline() != null) body.put("deadline", options.getDeadline());
+            if (options.getSlippage() != null) body.put("slippage", options.getSlippage());
+        }
+        return request("POST", "/transfers/lock", body)
+                .thenApply(resp -> gson.fromJson(resp, LockReceipt.class));
+    }
+
+    public CompletableFuture<LockProof> getLockProof(String lockReceiptId) {
+        return request("GET", "/transfers/lock/" + encode(lockReceiptId) + "/proof", null)
+                .thenApply(resp -> gson.fromJson(resp, LockProof.class));
+    }
+
+    public CompletableFuture<LockProof> waitForLockProof(String lockReceiptId, long pollIntervalMs, long maxWaitMs) {
+        long deadline = System.currentTimeMillis() + maxWaitMs;
+        return waitForLockProofInternal(lockReceiptId, pollIntervalMs, deadline);
+    }
+
+    private CompletableFuture<LockProof> waitForLockProofInternal(String id, long pollMs, long deadline) {
+        if (System.currentTimeMillis() >= deadline) {
+            return CompletableFuture.failedFuture(
+                    new BridgeException("Timeout waiting for lock proof", "CONFIRMATIONS_PENDING", 0));
+        }
+        return getLockProof(id)
+                .exceptionallyCompose(e -> {
+                    if (e.getCause() instanceof BridgeException &&
+                        "CONFIRMATIONS_PENDING".equals(((BridgeException) e.getCause()).getCode())) {
+                        return CompletableFuture.runAsync(() -> sleep(pollMs))
+                                .thenCompose(v -> waitForLockProofInternal(id, pollMs, deadline));
+                    }
+                    return CompletableFuture.failedFuture(e);
+                });
+    }
+
+    public CompletableFuture<SignedTransaction> mint(LockProof proof, String targetAddress, MintOptions options) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("proof", proof);
+        body.put("targetAddress", targetAddress);
+        if (options != null) {
+            if (options.getGasLimit() != null) body.put("gasLimit", options.getGasLimit());
+            if (options.getMaxFeePerGas() != null) body.put("maxFeePerGas", options.getMaxFeePerGas());
+        }
+        return request("POST", "/transfers/mint", body)
+                .thenApply(resp -> gson.fromJson(resp, SignedTransaction.class));
+    }
+
+    // ==================== Burn-Unlock Flow ====================
+
+    public CompletableFuture<BurnReceipt> burn(String wrappedAsset, String amount, BurnOptions options) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("wrappedAsset", wrappedAsset);
+        body.put("amount", amount);
+        if (options != null) {
+            if (options.getRecipient() != null) body.put("recipient", options.getRecipient());
+            if (options.getDeadline() != null) body.put("deadline", options.getDeadline());
+        }
+        return request("POST", "/transfers/burn", body)
+                .thenApply(resp -> gson.fromJson(resp, BurnReceipt.class));
+    }
+
+    public CompletableFuture<BurnProof> getBurnProof(String burnReceiptId) {
+        return request("GET", "/transfers/burn/" + encode(burnReceiptId) + "/proof", null)
+                .thenApply(resp -> gson.fromJson(resp, BurnProof.class));
+    }
+
+    public CompletableFuture<BurnProof> waitForBurnProof(String burnReceiptId, long pollIntervalMs, long maxWaitMs) {
+        long deadline = System.currentTimeMillis() + maxWaitMs;
+        return waitForBurnProofInternal(burnReceiptId, pollIntervalMs, deadline);
+    }
+
+    private CompletableFuture<BurnProof> waitForBurnProofInternal(String id, long pollMs, long deadline) {
+        if (System.currentTimeMillis() >= deadline) {
+            return CompletableFuture.failedFuture(
+                    new BridgeException("Timeout waiting for burn proof", "CONFIRMATIONS_PENDING", 0));
+        }
+        return getBurnProof(id)
+                .exceptionallyCompose(e -> {
+                    if (e.getCause() instanceof BridgeException &&
+                        "CONFIRMATIONS_PENDING".equals(((BridgeException) e.getCause()).getCode())) {
+                        return CompletableFuture.runAsync(() -> sleep(pollMs))
+                                .thenCompose(v -> waitForBurnProofInternal(id, pollMs, deadline));
+                    }
+                    return CompletableFuture.failedFuture(e);
+                });
+    }
+
+    public CompletableFuture<SignedTransaction> unlock(BurnProof proof, UnlockOptions options) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("proof", proof);
+        if (options != null) {
+            if (options.getGasLimit() != null) body.put("gasLimit", options.getGasLimit());
+            if (options.getGasPrice() != null) body.put("gasPrice", options.getGasPrice());
+        }
+        return request("POST", "/transfers/unlock", body)
+                .thenApply(resp -> gson.fromJson(resp, SignedTransaction.class));
+    }
+
+    // ==================== Transfer Management ====================
+
+    public CompletableFuture<Transfer> getTransfer(String transferId) {
+        return request("GET", "/transfers/" + encode(transferId), null)
+                .thenApply(resp -> gson.fromJson(resp, Transfer.class));
+    }
+
+    public CompletableFuture<TransferStatus> getTransferStatus(String transferId) {
+        return getTransfer(transferId).thenApply(Transfer::getStatus);
+    }
+
+    public CompletableFuture<List<Transfer>> listTransfers(TransferFilter filter) {
+        StringBuilder path = new StringBuilder("/transfers");
+        if (filter != null) {
+            StringBuilder params = new StringBuilder();
+            if (filter.getStatus() != null) params.append("status=").append(filter.getStatus().name().toLowerCase());
+            if (filter.getSourceChain() != null) {
+                if (params.length() > 0) params.append("&");
+                params.append("sourceChain=").append(filter.getSourceChain().name().toLowerCase());
+            }
+            if (filter.getTargetChain() != null) {
+                if (params.length() > 0) params.append("&");
+                params.append("targetChain=").append(filter.getTargetChain().name().toLowerCase());
+            }
+            if (filter.getLimit() != null) {
+                if (params.length() > 0) params.append("&");
+                params.append("limit=").append(filter.getLimit());
+            }
+            if (params.length() > 0) path.append("?").append(params);
+        }
+        return request("GET", path.toString(), null)
+                .thenApply(resp -> {
+                    Type type = new TypeToken<TransfersResponse>(){}.getType();
+                    TransfersResponse result = gson.fromJson(resp, type);
+                    return result.transfers;
+                });
+    }
+
+    public CompletableFuture<Transfer> waitForTransfer(String transferId, long pollIntervalMs, long maxWaitMs) {
+        long deadline = System.currentTimeMillis() + maxWaitMs;
+        return waitForTransferInternal(transferId, pollIntervalMs, deadline);
+    }
+
+    private CompletableFuture<Transfer> waitForTransferInternal(String id, long pollMs, long deadline) {
+        if (System.currentTimeMillis() >= deadline) {
+            return CompletableFuture.failedFuture(new BridgeException("Timeout waiting for transfer completion"));
+        }
+        return getTransfer(id).thenCompose(transfer -> {
+            if (FINAL_STATUSES.contains(transfer.getStatus())) {
+                return CompletableFuture.completedFuture(transfer);
+            }
+            return CompletableFuture.runAsync(() -> sleep(pollMs))
+                    .thenCompose(v -> waitForTransferInternal(id, pollMs, deadline));
+        });
+    }
+
+    // ==================== Convenience Methods ====================
+
+    public CompletableFuture<Transfer> bridgeTo(String asset, String amount, ChainId targetChain,
+                                                 String targetAddress, LockOptions lockOpts, MintOptions mintOpts) {
+        return lock(asset, amount, targetChain, lockOpts)
+                .thenCompose(receipt -> waitForLockProof(receipt.getId(), 5000, 600000)
+                        .thenCompose(proof -> mint(proof, targetAddress, mintOpts))
+                        .thenCompose(tx -> waitForTransfer(receipt.getId(), 10000, 1800000)));
+    }
+
+    public CompletableFuture<Transfer> bridgeBack(String wrappedAsset, String amount,
+                                                   BurnOptions burnOpts, UnlockOptions unlockOpts) {
+        return burn(wrappedAsset, amount, burnOpts)
+                .thenCompose(receipt -> waitForBurnProof(receipt.getId(), 5000, 600000)
+                        .thenCompose(proof -> unlock(proof, unlockOpts))
+                        .thenCompose(tx -> waitForTransfer(receipt.getId(), 10000, 1800000)));
+    }
+
+    // ==================== Lifecycle ====================
+
+    @Override
+    public void close() {
+        closed.set(true);
+    }
+
+    public boolean isClosed() {
+        return closed.get();
+    }
+
+    public CompletableFuture<Boolean> healthCheck() {
+        return request("GET", "/health", null)
+                .thenApply(resp -> {
+                    Map<String, Object> map = gson.fromJson(resp, new TypeToken<Map<String, Object>>(){}.getType());
+                    return "healthy".equals(map.get("status"));
+                })
+                .exceptionally(e -> false);
+    }
+
+    // ==================== Private Methods ====================
+
+    private CompletableFuture<String> request(String method, String path, Object body) {
+        if (closed.get()) {
+            return CompletableFuture.failedFuture(new BridgeException("Client has been closed"));
+        }
+        return doRequest(method, path, body, 0);
+    }
+
+    private CompletableFuture<String> doRequest(String method, String path, Object body, int attempt) {
+        String url = config.getEndpoint() + path;
+
+        HttpRequest.Builder builder = HttpRequest.newBuilder()
+                .uri(URI.create(url))
+                .header("Authorization", "Bearer " + config.getApiKey())
+                .header("Content-Type", "application/json")
+                .header("X-SDK-Version", "java/0.1.0")
+                .timeout(Duration.ofSeconds(config.getTimeoutSecs()));
+
+        HttpRequest.BodyPublisher bodyPub = body != null
+                ? HttpRequest.BodyPublishers.ofString(gson.toJson(body))
+                : HttpRequest.BodyPublishers.noBody();
+
+        switch (method) {
+            case "GET": builder.GET(); break;
+            case "POST": builder.POST(bodyPub); break;
+            case "PUT": builder.PUT(bodyPub); break;
+            case "DELETE": builder.method("DELETE", bodyPub); break;
+        }
+
+        return httpClient.sendAsync(builder.build(), HttpResponse.BodyHandlers.ofString())
+                .thenCompose(response -> {
+                    if (response.statusCode() >= 400) {
+                        Map<String, Object> errorBody = gson.fromJson(response.body(),
+                                new TypeToken<Map<String, Object>>(){}.getType());
+                        String message = errorBody != null && errorBody.get("message") != null
+                                ? (String) errorBody.get("message") : "HTTP " + response.statusCode();
+                        String code = errorBody != null ? (String) errorBody.get("code") : null;
+                        return CompletableFuture.failedFuture(
+                                new BridgeException(message, code, response.statusCode()));
+                    }
+                    return CompletableFuture.completedFuture(response.body());
+                })
+                .exceptionally(e -> {
+                    if (attempt < config.getRetries() - 1) {
+                        sleep((long) Math.pow(2, attempt) * 1000);
+                        return doRequest(method, path, body, attempt + 1).join();
+                    }
+                    throw new RuntimeException(e);
+                });
+    }
+
+    private static String encode(String value) {
+        return java.net.URLEncoder.encode(value, java.nio.charset.StandardCharsets.UTF_8);
+    }
+
+    private static void sleep(long ms) {
+        try { Thread.sleep(ms); } catch (InterruptedException e) { Thread.currentThread().interrupt(); }
+    }
+
+    // Helper response types
+    private static class ChainsResponse { List<Chain> chains; }
+    private static class AssetsResponse { List<Asset> assets; }
+    private static class TransfersResponse { List<Transfer> transfers; }
+}

sdk/java/src/main/java/io/synor/bridge/Types.java

@@ -0,0 +1,404 @@
+package io.synor.bridge;
+
+import java.util.List;
+
+/**
+ * Bridge SDK Types for Java.
+ */
+public class Types {
+    // Organizational class
+}
+
+// ==================== Enums ====================
+
+enum ChainId { synor, ethereum, polygon, arbitrum, optimism, bsc, avalanche, solana, cosmos }
+enum AssetType { native, erc20, erc721, erc1155 }
+enum TransferStatus { pending, locked, confirming, minting, completed, failed, refunded }
+enum TransferDirection { lock_mint, burn_unlock }
+
+// ==================== Config ====================
+
+class BridgeConfig {
+    private final String apiKey;
+    private final String endpoint;
+    private final int timeoutSecs;
+    private final int retries;
+    private final boolean debug;
+
+    public BridgeConfig(String apiKey) {
+        this(apiKey, "https://bridge.synor.io/v1", 60, 3, false);
+    }
+
+    public BridgeConfig(String apiKey, String endpoint, int timeoutSecs, int retries, boolean debug) {
+        this.apiKey = apiKey;
+        this.endpoint = endpoint;
+        this.timeoutSecs = timeoutSecs;
+        this.retries = retries;
+        this.debug = debug;
+    }
+
+    public String getApiKey() { return apiKey; }
+    public String getEndpoint() { return endpoint; }
+    public int getTimeoutSecs() { return timeoutSecs; }
+    public int getRetries() { return retries; }
+    public boolean isDebug() { return debug; }
+}
+
+// ==================== Chain & Asset Types ====================
+
+class NativeCurrency {
+    private String name;
+    private String symbol;
+    private int decimals;
+
+    public String getName() { return name; }
+    public String getSymbol() { return symbol; }
+    public int getDecimals() { return decimals; }
+}
+
+class Chain {
+    private ChainId id;
+    private String name;
+    private long chainId;
+    private String rpcUrl;
+    private String explorerUrl;
+    private NativeCurrency nativeCurrency;
+    private int confirmations;
+    private int estimatedBlockTime;
+    private boolean supported;
+
+    public ChainId getId() { return id; }
+    public String getName() { return name; }
+    public long getChainId() { return chainId; }
+    public String getRpcUrl() { return rpcUrl; }
+    public String getExplorerUrl() { return explorerUrl; }
+    public NativeCurrency getNativeCurrency() { return nativeCurrency; }
+    public int getConfirmations() { return confirmations; }
+    public int getEstimatedBlockTime() { return estimatedBlockTime; }
+    public boolean isSupported() { return supported; }
+}
+
+class Asset {
+    private String id;
+    private String symbol;
+    private String name;
+    private AssetType type;
+    private ChainId chain;
+    private String contractAddress;
+    private int decimals;
+    private String logoUrl;
+    private boolean verified;
+
+    public String getId() { return id; }
+    public String getSymbol() { return symbol; }
+    public String getName() { return name; }
+    public AssetType getType() { return type; }
+    public ChainId getChain() { return chain; }
+    public String getContractAddress() { return contractAddress; }
+    public int getDecimals() { return decimals; }
+    public String getLogoUrl() { return logoUrl; }
+    public boolean isVerified() { return verified; }
+}
+
+class WrappedAsset {
+    private Asset originalAsset;
+    private Asset wrappedAsset;
+    private ChainId chain;
+    private String bridgeContract;
+
+    public Asset getOriginalAsset() { return originalAsset; }
+    public Asset getWrappedAsset() { return wrappedAsset; }
+    public ChainId getChain() { return chain; }
+    public String getBridgeContract() { return bridgeContract; }
+}
+
+// ==================== Transfer Types ====================
+
+class ValidatorSignature {
+    private String validator;
+    private String signature;
+    private long timestamp;
+
+    public String getValidator() { return validator; }
+    public String getSignature() { return signature; }
+    public long getTimestamp() { return timestamp; }
+}
+
+class LockReceipt {
+    private String id;
+    private String txHash;
+    private ChainId sourceChain;
+    private ChainId targetChain;
+    private Asset asset;
+    private String amount;
+    private String sender;
+    private String recipient;
+    private long lockTimestamp;
+    private int confirmations;
+    private int requiredConfirmations;
+
+    public String getId() { return id; }
+    public String getTxHash() { return txHash; }
+    public ChainId getSourceChain() { return sourceChain; }
+    public ChainId getTargetChain() { return targetChain; }
+    public Asset getAsset() { return asset; }
+    public String getAmount() { return amount; }
+    public String getSender() { return sender; }
+    public String getRecipient() { return recipient; }
+    public long getLockTimestamp() { return lockTimestamp; }
+    public int getConfirmations() { return confirmations; }
+    public int getRequiredConfirmations() { return requiredConfirmations; }
+}
+
+class LockProof {
+    private LockReceipt lockReceipt;
+    private List<String> merkleProof;
+    private String blockHeader;
+    private List<ValidatorSignature> signatures;
+
+    public LockReceipt getLockReceipt() { return lockReceipt; }
+    public List<String> getMerkleProof() { return merkleProof; }
+    public String getBlockHeader() { return blockHeader; }
+    public List<ValidatorSignature> getSignatures() { return signatures; }
+}
+
+class BurnReceipt {
+    private String id;
+    private String txHash;
+    private ChainId sourceChain;
+    private ChainId targetChain;
+    private Asset wrappedAsset;
+    private Asset originalAsset;
+    private String amount;
+    private String sender;
+    private String recipient;
+    private long burnTimestamp;
+    private int confirmations;
+    private int requiredConfirmations;
+
+    public String getId() { return id; }
+    public String getTxHash() { return txHash; }
+    public ChainId getSourceChain() { return sourceChain; }
+    public ChainId getTargetChain() { return targetChain; }
+    public Asset getWrappedAsset() { return wrappedAsset; }
+    public Asset getOriginalAsset() { return originalAsset; }
+    public String getAmount() { return amount; }
+    public String getSender() { return sender; }
+    public String getRecipient() { return recipient; }
+    public long getBurnTimestamp() { return burnTimestamp; }
+    public int getConfirmations() { return confirmations; }
+    public int getRequiredConfirmations() { return requiredConfirmations; }
+}
+
+class BurnProof {
+    private BurnReceipt burnReceipt;
+    private List<String> merkleProof;
+    private String blockHeader;
+    private List<ValidatorSignature> signatures;
+
+    public BurnReceipt getBurnReceipt() { return burnReceipt; }
+    public List<String> getMerkleProof() { return merkleProof; }
+    public String getBlockHeader() { return blockHeader; }
+    public List<ValidatorSignature> getSignatures() { return signatures; }
+}
+
+class Transfer {
+    private String id;
+    private TransferDirection direction;
+    private TransferStatus status;
+    private ChainId sourceChain;
+    private ChainId targetChain;
+    private Asset asset;
+    private String amount;
+    private String sender;
+    private String recipient;
+    private String sourceTxHash;
+    private String targetTxHash;
+    private String fee;
+    private Asset feeAsset;
+    private long createdAt;
+    private long updatedAt;
+    private Long completedAt;
+    private String errorMessage;
+
+    public String getId() { return id; }
+    public TransferDirection getDirection() { return direction; }
+    public TransferStatus getStatus() { return status; }
+    public ChainId getSourceChain() { return sourceChain; }
+    public ChainId getTargetChain() { return targetChain; }
+    public Asset getAsset() { return asset; }
+    public String getAmount() { return amount; }
+    public String getSender() { return sender; }
+    public String getRecipient() { return recipient; }
+    public String getSourceTxHash() { return sourceTxHash; }
+    public String getTargetTxHash() { return targetTxHash; }
+    public String getFee() { return fee; }
+    public Asset getFeeAsset() { return feeAsset; }
+    public long getCreatedAt() { return createdAt; }
+    public long getUpdatedAt() { return updatedAt; }
+    public Long getCompletedAt() { return completedAt; }
+    public String getErrorMessage() { return errorMessage; }
+}
+
+// ==================== Fee Types ====================
+
+class FeeEstimate {
+    private String bridgeFee;
+    private String gasFeeSource;
+    private String gasFeeTarget;
+    private String totalFee;
+    private Asset feeAsset;
+    private int estimatedTime;
+    private String exchangeRate;
+
+    public String getBridgeFee() { return bridgeFee; }
+    public String getGasFeeSource() { return gasFeeSource; }
+    public String getGasFeeTarget() { return gasFeeTarget; }
+    public String getTotalFee() { return totalFee; }
+    public Asset getFeeAsset() { return feeAsset; }
+    public int getEstimatedTime() { return estimatedTime; }
+    public String getExchangeRate() { return exchangeRate; }
+}
+
+class ExchangeRate {
+    private Asset fromAsset;
+    private Asset toAsset;
+    private String rate;
+    private String inverseRate;
+    private long lastUpdated;
+    private String source;
+
+    public Asset getFromAsset() { return fromAsset; }
+    public Asset getToAsset() { return toAsset; }
+    public String getRate() { return rate; }
+    public String getInverseRate() { return inverseRate; }
+    public long getLastUpdated() { return lastUpdated; }
+    public String getSource() { return source; }
+}
+
+class SignedTransaction {
+    private String txHash;
+    private ChainId chain;
+    private String from;
+    private String to;
+    private String value;
+    private String data;
+    private String gasLimit;
+    private String gasPrice;
+    private String maxFeePerGas;
+    private String maxPriorityFeePerGas;
+    private int nonce;
+    private String signature;
+
+    public String getTxHash() { return txHash; }
+    public ChainId getChain() { return chain; }
+    public String getFrom() { return from; }
+    public String getTo() { return to; }
+    public String getValue() { return value; }
+    public String getData() { return data; }
+    public String getGasLimit() { return gasLimit; }
+    public String getGasPrice() { return gasPrice; }
+    public String getMaxFeePerGas() { return maxFeePerGas; }
+    public String getMaxPriorityFeePerGas() { return maxPriorityFeePerGas; }
+    public int getNonce() { return nonce; }
+    public String getSignature() { return signature; }
+}
+
+// ==================== Options & Filter ====================
+
+class LockOptions {
+    private String recipient;
+    private Long deadline;
+    private Double slippage;
+
+    public String getRecipient() { return recipient; }
+    public Long getDeadline() { return deadline; }
+    public Double getSlippage() { return slippage; }
+    public void setRecipient(String recipient) { this.recipient = recipient; }
+    public void setDeadline(Long deadline) { this.deadline = deadline; }
+    public void setSlippage(Double slippage) { this.slippage = slippage; }
+}
+
+class MintOptions {
+    private String gasLimit;
+    private String maxFeePerGas;
+    private String maxPriorityFeePerGas;
+
+    public String getGasLimit() { return gasLimit; }
+    public String getMaxFeePerGas() { return maxFeePerGas; }
+    public String getMaxPriorityFeePerGas() { return maxPriorityFeePerGas; }
+    public void setGasLimit(String gasLimit) { this.gasLimit = gasLimit; }
+    public void setMaxFeePerGas(String maxFeePerGas) { this.maxFeePerGas = maxFeePerGas; }
+    public void setMaxPriorityFeePerGas(String v) { this.maxPriorityFeePerGas = v; }
+}
+
+class BurnOptions {
+    private String recipient;
+    private Long deadline;
+
+    public String getRecipient() { return recipient; }
+    public Long getDeadline() { return deadline; }
+    public void setRecipient(String recipient) { this.recipient = recipient; }
+    public void setDeadline(Long deadline) { this.deadline = deadline; }
+}
+
+class UnlockOptions {
+    private String gasLimit;
+    private String gasPrice;
+
+    public String getGasLimit() { return gasLimit; }
+    public String getGasPrice() { return gasPrice; }
+    public void setGasLimit(String gasLimit) { this.gasLimit = gasLimit; }
+    public void setGasPrice(String gasPrice) { this.gasPrice = gasPrice; }
+}
+
+class TransferFilter {
+    private TransferStatus status;
+    private ChainId sourceChain;
+    private ChainId targetChain;
+    private String asset;
+    private String sender;
+    private String recipient;
+    private Integer limit;
+    private Integer offset;
+
+    public TransferStatus getStatus() { return status; }
+    public ChainId getSourceChain() { return sourceChain; }
+    public ChainId getTargetChain() { return targetChain; }
+    public String getAsset() { return asset; }
+    public String getSender() { return sender; }
+    public String getRecipient() { return recipient; }
+    public Integer getLimit() { return limit; }
+    public Integer getOffset() { return offset; }
+
+    public void setStatus(TransferStatus status) { this.status = status; }
+    public void setSourceChain(ChainId sourceChain) { this.sourceChain = sourceChain; }
+    public void setTargetChain(ChainId targetChain) { this.targetChain = targetChain; }
+    public void setAsset(String asset) { this.asset = asset; }
+    public void setSender(String sender) { this.sender = sender; }
+    public void setRecipient(String recipient) { this.recipient = recipient; }
+    public void setLimit(Integer limit) { this.limit = limit; }
+    public void setOffset(Integer offset) { this.offset = offset; }
+}
+
+// ==================== Error ====================
+
+class BridgeException extends RuntimeException {
+    private final String code;
+    private final int statusCode;
+
+    public BridgeException(String message) {
+        super(message);
+        this.code = null;
+        this.statusCode = 0;
+    }
+
+    public BridgeException(String message, String code, int statusCode) {
+        super(message);
+        this.code = code;
+        this.statusCode = statusCode;
+    }
+
+    public String getCode() { return code; }
+    public int getStatusCode() { return statusCode; }
+}

sdk/java/src/main/java/io/synor/database/SynorDatabase.java

@@ -0,0 +1,309 @@
+package io.synor.database;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+
+import java.io.IOException;
+import java.lang.reflect.Type;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Synor Database SDK for Java.
+ * Multi-model database with Key-Value, Document, Vector, and Time Series stores.
+ */
+public class SynorDatabase implements AutoCloseable {
+    private static final String DEFAULT_ENDPOINT = "https://db.synor.io/v1";
+    private static final Gson gson = new GsonBuilder().create();
+
+    private final DatabaseConfig config;
+    private final HttpClient httpClient;
+    private final AtomicBoolean closed = new AtomicBoolean(false);
+
+    // Sub-stores
+    public final KeyValueStore kv;
+    public final DocumentStore documents;
+    public final VectorStore vectors;
+    public final TimeSeriesStore timeseries;
+
+    public SynorDatabase(String apiKey) {
+        this(new DatabaseConfig(apiKey, DEFAULT_ENDPOINT, 60, 3, false));
+    }
+
+    public SynorDatabase(DatabaseConfig config) {
+        this.config = config;
+        this.httpClient = HttpClient.newBuilder()
+                .connectTimeout(Duration.ofSeconds(config.getTimeoutSecs()))
+                .build();
+
+        this.kv = new KeyValueStore(this);
+        this.documents = new DocumentStore(this);
+        this.vectors = new VectorStore(this);
+        this.timeseries = new TimeSeriesStore(this);
+    }
+
+    // ==================== Key-Value Store ====================
+
+    public static class KeyValueStore {
+        private final SynorDatabase db;
+
+        KeyValueStore(SynorDatabase db) {
+            this.db = db;
+        }
+
+        public CompletableFuture<Object> get(String key) {
+            return db.request("GET", "/kv/" + encode(key), null)
+                    .thenApply(resp -> {
+                        Map<String, Object> map = gson.fromJson(resp, new TypeToken<Map<String, Object>>(){}.getType());
+                        return map.get("value");
+                    });
+        }
+
+        public CompletableFuture<Void> set(String key, Object value, Integer ttl) {
+            Map<String, Object> body = new HashMap<>();
+            body.put("key", key);
+            body.put("value", value);
+            if (ttl != null) body.put("ttl", ttl);
+
+            return db.request("PUT", "/kv/" + encode(key), body)
+                    .thenApply(resp -> null);
+        }
+
+        public CompletableFuture<Void> delete(String key) {
+            return db.request("DELETE", "/kv/" + encode(key), null)
+                    .thenApply(resp -> null);
+        }
+
+        public CompletableFuture<List<KeyValue>> list(String prefix) {
+            String path = "/kv?prefix=" + encode(prefix);
+            return db.request("GET", path, null)
+                    .thenApply(resp -> {
+                        Type type = new TypeToken<ListResponse<KeyValue>>(){}.getType();
+                        ListResponse<KeyValue> result = gson.fromJson(resp, type);
+                        return result.items;
+                    });
+        }
+    }
+
+    // ==================== Document Store ====================
+
+    public static class DocumentStore {
+        private final SynorDatabase db;
+
+        DocumentStore(SynorDatabase db) {
+            this.db = db;
+        }
+
+        public CompletableFuture<String> create(String collection, Map<String, Object> document) {
+            return db.request("POST", "/collections/" + encode(collection) + "/documents", document)
+                    .thenApply(resp -> {
+                        Map<String, Object> map = gson.fromJson(resp, new TypeToken<Map<String, Object>>(){}.getType());
+                        return (String) map.get("id");
+                    });
+        }
+
+        public CompletableFuture<Document> get(String collection, String id) {
+            return db.request("GET", "/collections/" + encode(collection) + "/documents/" + encode(id), null)
+                    .thenApply(resp -> gson.fromJson(resp, Document.class));
+        }
+
+        public CompletableFuture<Void> update(String collection, String id, Map<String, Object> update) {
+            return db.request("PATCH", "/collections/" + encode(collection) + "/documents/" + encode(id), update)
+                    .thenApply(resp -> null);
+        }
+
+        public CompletableFuture<Void> delete(String collection, String id) {
+            return db.request("DELETE", "/collections/" + encode(collection) + "/documents/" + encode(id), null)
+                    .thenApply(resp -> null);
+        }
+
+        public CompletableFuture<List<Document>> query(String collection, Query query) {
+            return db.request("POST", "/collections/" + encode(collection) + "/query", query)
+                    .thenApply(resp -> {
+                        Type type = new TypeToken<ListResponse<Document>>(){}.getType();
+                        ListResponse<Document> result = gson.fromJson(resp, type);
+                        return result.documents;
+                    });
+        }
+    }
+
+    // ==================== Vector Store ====================
+
+    public static class VectorStore {
+        private final SynorDatabase db;
+
+        VectorStore(SynorDatabase db) {
+            this.db = db;
+        }
+
+        public CompletableFuture<Void> upsert(String collection, List<VectorEntry> vectors) {
+            Map<String, Object> body = new HashMap<>();
+            body.put("vectors", vectors);
+
+            return db.request("POST", "/vectors/" + encode(collection) + "/upsert", body)
+                    .thenApply(resp -> null);
+        }
+
+        public CompletableFuture<List<SearchResult>> search(String collection, double[] vector, int k) {
+            Map<String, Object> body = new HashMap<>();
+            body.put("vector", vector);
+            body.put("k", k);
+
+            return db.request("POST", "/vectors/" + encode(collection) + "/search", body)
+                    .thenApply(resp -> {
+                        Type type = new TypeToken<ListResponse<SearchResult>>(){}.getType();
+                        ListResponse<SearchResult> result = gson.fromJson(resp, type);
+                        return result.results;
+                    });
+        }
+
+        public CompletableFuture<Void> delete(String collection, List<String> ids) {
+            Map<String, Object> body = new HashMap<>();
+            body.put("ids", ids);
+
+            return db.request("DELETE", "/vectors/" + encode(collection), body)
+                    .thenApply(resp -> null);
+        }
+    }
+
+    // ==================== Time Series Store ====================
+
+    public static class TimeSeriesStore {
+        private final SynorDatabase db;
+
+        TimeSeriesStore(SynorDatabase db) {
+            this.db = db;
+        }
+
+        public CompletableFuture<Void> write(String series, List<DataPoint> points) {
+            Map<String, Object> body = new HashMap<>();
+            body.put("points", points);
+
+            return db.request("POST", "/timeseries/" + encode(series) + "/write", body)
+                    .thenApply(resp -> null);
+        }
+
+        public CompletableFuture<List<DataPoint>> query(String series, TimeRange range, Aggregation aggregation) {
+            Map<String, Object> body = new HashMap<>();
+            body.put("range", range);
+            if (aggregation != null) body.put("aggregation", aggregation);
+
+            return db.request("POST", "/timeseries/" + encode(series) + "/query", body)
+                    .thenApply(resp -> {
+                        Type type = new TypeToken<ListResponse<DataPoint>>(){}.getType();
+                        ListResponse<DataPoint> result = gson.fromJson(resp, type);
+                        return result.points;
+                    });
+        }
+    }
+
+    // ==================== Lifecycle ====================
+
+    @Override
+    public void close() {
+        closed.set(true);
+    }
+
+    public boolean isClosed() {
+        return closed.get();
+    }
+
+    public CompletableFuture<Boolean> healthCheck() {
+        return request("GET", "/health", null)
+                .thenApply(resp -> {
+                    Map<String, Object> map = gson.fromJson(resp, new TypeToken<Map<String, Object>>(){}.getType());
+                    return "healthy".equals(map.get("status"));
+                })
+                .exceptionally(e -> false);
+    }
+
+    // ==================== Private Methods ====================
+
+    private CompletableFuture<String> request(String method, String path, Object body) {
+        if (closed.get()) {
+            return CompletableFuture.failedFuture(new DatabaseException("Client has been closed"));
+        }
+
+        return doRequest(method, path, body, 0);
+    }
+
+    private CompletableFuture<String> doRequest(String method, String path, Object body, int attempt) {
+        String url = config.getEndpoint() + path;
+
+        HttpRequest.Builder requestBuilder = HttpRequest.newBuilder()
+                .uri(URI.create(url))
+                .header("Authorization", "Bearer " + config.getApiKey())
+                .header("Content-Type", "application/json")
+                .header("X-SDK-Version", "java/0.1.0")
+                .timeout(Duration.ofSeconds(config.getTimeoutSecs()));
+
+        HttpRequest.BodyPublisher bodyPublisher = body != null
+                ? HttpRequest.BodyPublishers.ofString(gson.toJson(body))
+                : HttpRequest.BodyPublishers.noBody();
+
+        switch (method) {
+            case "GET":
+                requestBuilder.GET();
+                break;
+            case "POST":
+                requestBuilder.POST(bodyPublisher);
+                break;
+            case "PUT":
+                requestBuilder.PUT(bodyPublisher);
+                break;
+            case "PATCH":
+                requestBuilder.method("PATCH", bodyPublisher);
+                break;
+            case "DELETE":
+                requestBuilder.method("DELETE", bodyPublisher);
+                break;
+        }
+
+        return httpClient.sendAsync(requestBuilder.build(), HttpResponse.BodyHandlers.ofString())
+                .thenCompose(response -> {
+                    if (response.statusCode() >= 400) {
+                        Map<String, Object> errorBody = gson.fromJson(response.body(),
+                                new TypeToken<Map<String, Object>>(){}.getType());
+                        String message = errorBody != null && errorBody.get("message") != null
+                                ? (String) errorBody.get("message")
+                                : "HTTP " + response.statusCode();
+                        return CompletableFuture.failedFuture(
+                                new DatabaseException(message, (String) errorBody.get("code"), response.statusCode()));
+                    }
+                    return CompletableFuture.completedFuture(response.body());
+                })
+                .exceptionally(e -> {
+                    if (attempt < config.getRetries() - 1) {
+                        try {
+                            Thread.sleep((long) Math.pow(2, attempt) * 1000);
+                        } catch (InterruptedException ie) {
+                            Thread.currentThread().interrupt();
+                        }
+                        return doRequest(method, path, body, attempt + 1).join();
+                    }
+                    throw new RuntimeException(e);
+                });
+    }
+
+    private static String encode(String value) {
+        return java.net.URLEncoder.encode(value, java.nio.charset.StandardCharsets.UTF_8);
+    }
+
+    // ==================== Helper Types ====================
+
+    private static class ListResponse<T> {
+        List<T> items;
+        List<T> documents;
+        List<T> results;
+        List<T> points;
+    }
+}

sdk/java/src/main/java/io/synor/database/Types.java

@@ -0,0 +1,210 @@
+package io.synor.database;
+
+import java.util.Map;
+
+/**
+ * Database SDK Types for Java.
+ */
+public class Types {
+    // This class exists for organizational purposes.
+    // Individual types are defined below.
+}
+
+// ==================== Config ====================
+
+class DatabaseConfig {
+    private final String apiKey;
+    private final String endpoint;
+    private final int timeoutSecs;
+    private final int retries;
+    private final boolean debug;
+
+    public DatabaseConfig(String apiKey) {
+        this(apiKey, "https://db.synor.io/v1", 60, 3, false);
+    }
+
+    public DatabaseConfig(String apiKey, String endpoint, int timeoutSecs, int retries, boolean debug) {
+        this.apiKey = apiKey;
+        this.endpoint = endpoint;
+        this.timeoutSecs = timeoutSecs;
+        this.retries = retries;
+        this.debug = debug;
+    }
+
+    public String getApiKey() { return apiKey; }
+    public String getEndpoint() { return endpoint; }
+    public int getTimeoutSecs() { return timeoutSecs; }
+    public int getRetries() { return retries; }
+    public boolean isDebug() { return debug; }
+}
+
+// ==================== Key-Value Types ====================
+
+class KeyValue {
+    private String key;
+    private Object value;
+    private Long ttl;
+    private Long createdAt;
+    private Long updatedAt;
+
+    public String getKey() { return key; }
+    public Object getValue() { return value; }
+    public Long getTtl() { return ttl; }
+    public Long getCreatedAt() { return createdAt; }
+    public Long getUpdatedAt() { return updatedAt; }
+}
+
+// ==================== Document Types ====================
+
+class Document {
+    private String id;
+    private String collection;
+    private Map<String, Object> data;
+    private Long createdAt;
+    private Long updatedAt;
+
+    public String getId() { return id; }
+    public String getCollection() { return collection; }
+    public Map<String, Object> getData() { return data; }
+    public Long getCreatedAt() { return createdAt; }
+    public Long getUpdatedAt() { return updatedAt; }
+}
+
+class Query {
+    private Map<String, Object> filter;
+    private Map<String, Integer> sort;
+    private Integer limit;
+    private Integer offset;
+    private String[] projection;
+
+    public Query filter(Map<String, Object> filter) {
+        this.filter = filter;
+        return this;
+    }
+
+    public Query sort(Map<String, Integer> sort) {
+        this.sort = sort;
+        return this;
+    }
+
+    public Query limit(int limit) {
+        this.limit = limit;
+        return this;
+    }
+
+    public Query offset(int offset) {
+        this.offset = offset;
+        return this;
+    }
+
+    public Query projection(String... fields) {
+        this.projection = fields;
+        return this;
+    }
+}
+
+// ==================== Vector Types ====================
+
+class VectorEntry {
+    private String id;
+    private double[] vector;
+    private Map<String, Object> metadata;
+
+    public VectorEntry(String id, double[] vector) {
+        this.id = id;
+        this.vector = vector;
+    }
+
+    public VectorEntry(String id, double[] vector, Map<String, Object> metadata) {
+        this.id = id;
+        this.vector = vector;
+        this.metadata = metadata;
+    }
+
+    public String getId() { return id; }
+    public double[] getVector() { return vector; }
+    public Map<String, Object> getMetadata() { return metadata; }
+}
+
+class SearchResult {
+    private String id;
+    private double score;
+    private double[] vector;
+    private Map<String, Object> metadata;
+
+    public String getId() { return id; }
+    public double getScore() { return score; }
+    public double[] getVector() { return vector; }
+    public Map<String, Object> getMetadata() { return metadata; }
+}
+
+// ==================== Time Series Types ====================
+
+class DataPoint {
+    private long timestamp;
+    private double value;
+    private Map<String, String> tags;
+
+    public DataPoint(long timestamp, double value) {
+        this.timestamp = timestamp;
+        this.value = value;
+    }
+
+    public DataPoint(long timestamp, double value, Map<String, String> tags) {
+        this.timestamp = timestamp;
+        this.value = value;
+        this.tags = tags;
+    }
+
+    public long getTimestamp() { return timestamp; }
+    public double getValue() { return value; }
+    public Map<String, String> getTags() { return tags; }
+}
+
+class TimeRange {
+    private long start;
+    private long end;
+
+    public TimeRange(long start, long end) {
+        this.start = start;
+        this.end = end;
+    }
+
+    public long getStart() { return start; }
+    public long getEnd() { return end; }
+}
+
+class Aggregation {
+    private String function; // sum, avg, min, max, count
+    private String interval; // 1m, 5m, 1h, 1d
+
+    public Aggregation(String function, String interval) {
+        this.function = function;
+        this.interval = interval;
+    }
+
+    public String getFunction() { return function; }
+    public String getInterval() { return interval; }
+}
+
+// ==================== Error Types ====================
+
+class DatabaseException extends RuntimeException {
+    private final String code;
+    private final int statusCode;
+
+    public DatabaseException(String message) {
+        super(message);
+        this.code = null;
+        this.statusCode = 0;
+    }
+
+    public DatabaseException(String message, String code, int statusCode) {
+        super(message);
+        this.code = code;
+        this.statusCode = statusCode;
+    }
+
+    public String getCode() { return code; }
+    public int getStatusCode() { return statusCode; }
+}

sdk/java/src/main/java/io/synor/hosting/SynorHosting.java

@@ -0,0 +1,304 @@
+package io.synor.hosting;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.reflect.TypeToken;
+
+import java.lang.reflect.Type;
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.atomic.AtomicBoolean;
+
+/**
+ * Synor Hosting SDK for Java.
+ * Decentralized web hosting with domain management, DNS, and deployments.
+ */
+public class SynorHosting implements AutoCloseable {
+    private static final String DEFAULT_ENDPOINT = "https://hosting.synor.io/v1";
+    private static final Gson gson = new GsonBuilder().create();
+
+    private final HostingConfig config;
+    private final HttpClient httpClient;
+    private final AtomicBoolean closed = new AtomicBoolean(false);
+
+    public SynorHosting(String apiKey) {
+        this(new HostingConfig(apiKey, DEFAULT_ENDPOINT, 60, 3, false));
+    }
+
+    public SynorHosting(HostingConfig config) {
+        this.config = config;
+        this.httpClient = HttpClient.newBuilder()
+                .connectTimeout(Duration.ofSeconds(config.getTimeoutSecs()))
+                .build();
+    }
+
+    // ==================== Domain Operations ====================
+
+    public CompletableFuture<DomainAvailability> checkAvailability(String name) {
+        return request("GET", "/domains/check/" + encode(name), null)
+                .thenApply(resp -> gson.fromJson(resp, DomainAvailability.class));
+    }
+
+    public CompletableFuture<Domain> registerDomain(String name, RegisterDomainOptions options) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("name", name);
+        if (options != null) {
+            if (options.getYears() != null) body.put("years", options.getYears());
+            if (options.getAutoRenew() != null) body.put("autoRenew", options.getAutoRenew());
+        }
+        return request("POST", "/domains", body)
+                .thenApply(resp -> gson.fromJson(resp, Domain.class));
+    }
+
+    public CompletableFuture<Domain> getDomain(String name) {
+        return request("GET", "/domains/" + encode(name), null)
+                .thenApply(resp -> gson.fromJson(resp, Domain.class));
+    }
+
+    public CompletableFuture<List<Domain>> listDomains() {
+        return request("GET", "/domains", null)
+                .thenApply(resp -> {
+                    Type type = new TypeToken<DomainsResponse>(){}.getType();
+                    DomainsResponse result = gson.fromJson(resp, type);
+                    return result.domains;
+                });
+    }
+
+    public CompletableFuture<Domain> updateDomainRecord(String name, DomainRecord record) {
+        return request("PUT", "/domains/" + encode(name) + "/record", record)
+                .thenApply(resp -> gson.fromJson(resp, Domain.class));
+    }
+
+    public CompletableFuture<DomainRecord> resolveDomain(String name) {
+        return request("GET", "/domains/" + encode(name) + "/resolve", null)
+                .thenApply(resp -> gson.fromJson(resp, DomainRecord.class));
+    }
+
+    public CompletableFuture<Domain> renewDomain(String name, int years) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("years", years);
+        return request("POST", "/domains/" + encode(name) + "/renew", body)
+                .thenApply(resp -> gson.fromJson(resp, Domain.class));
+    }
+
+    // ==================== DNS Operations ====================
+
+    public CompletableFuture<DnsZone> getDnsZone(String domain) {
+        return request("GET", "/dns/" + encode(domain), null)
+                .thenApply(resp -> gson.fromJson(resp, DnsZone.class));
+    }
+
+    public CompletableFuture<DnsZone> setDnsRecords(String domain, List<DnsRecord> records) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("records", records);
+        return request("PUT", "/dns/" + encode(domain), body)
+                .thenApply(resp -> gson.fromJson(resp, DnsZone.class));
+    }
+
+    public CompletableFuture<DnsZone> addDnsRecord(String domain, DnsRecord record) {
+        return request("POST", "/dns/" + encode(domain) + "/records", record)
+                .thenApply(resp -> gson.fromJson(resp, DnsZone.class));
+    }
+
+    public CompletableFuture<DnsZone> deleteDnsRecord(String domain, String recordType, String name) {
+        String path = "/dns/" + encode(domain) + "/records/" + recordType + "/" + encode(name);
+        return request("DELETE", path, null)
+                .thenApply(resp -> gson.fromJson(resp, DnsZone.class));
+    }
+
+    // ==================== Deployment Operations ====================
+
+    public CompletableFuture<Deployment> deploy(String cid, DeployOptions options) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("cid", cid);
+        if (options != null) {
+            if (options.getDomain() != null) body.put("domain", options.getDomain());
+            if (options.getSubdomain() != null) body.put("subdomain", options.getSubdomain());
+            if (options.getSpa() != null) body.put("spa", options.getSpa());
+            if (options.getCleanUrls() != null) body.put("cleanUrls", options.getCleanUrls());
+        }
+        return request("POST", "/deployments", body)
+                .thenApply(resp -> gson.fromJson(resp, Deployment.class));
+    }
+
+    public CompletableFuture<Deployment> getDeployment(String id) {
+        return request("GET", "/deployments/" + encode(id), null)
+                .thenApply(resp -> gson.fromJson(resp, Deployment.class));
+    }
+
+    public CompletableFuture<List<Deployment>> listDeployments(String domain) {
+        String path = domain != null ? "/deployments?domain=" + encode(domain) : "/deployments";
+        return request("GET", path, null)
+                .thenApply(resp -> {
+                    Type type = new TypeToken<DeploymentsResponse>(){}.getType();
+                    DeploymentsResponse result = gson.fromJson(resp, type);
+                    return result.deployments;
+                });
+    }
+
+    public CompletableFuture<Deployment> rollback(String domain, String deploymentId) {
+        Map<String, Object> body = new HashMap<>();
+        body.put("domain", domain);
+        return request("POST", "/deployments/" + encode(deploymentId) + "/rollback", body)
+                .thenApply(resp -> gson.fromJson(resp, Deployment.class));
+    }
+
+    public CompletableFuture<Void> deleteDeployment(String id) {
+        return request("DELETE", "/deployments/" + encode(id), null)
+                .thenApply(resp -> null);
+    }
+
+    // ==================== SSL Operations ====================
+
+    public CompletableFuture<Certificate> provisionSsl(String domain, ProvisionSslOptions options) {
+        return request("POST", "/ssl/" + encode(domain), options)
+                .thenApply(resp -> gson.fromJson(resp, Certificate.class));
+    }
+
+    public CompletableFuture<Certificate> getCertificate(String domain) {
+        return request("GET", "/ssl/" + encode(domain), null)
+                .thenApply(resp -> gson.fromJson(resp, Certificate.class));
+    }
+
+    public CompletableFuture<Certificate> renewCertificate(String domain) {
+        return request("POST", "/ssl/" + encode(domain) + "/renew", null)
+                .thenApply(resp -> gson.fromJson(resp, Certificate.class));
+    }
+
+    public CompletableFuture<Void> deleteCertificate(String domain) {
+        return request("DELETE", "/ssl/" + encode(domain), null)
+                .thenApply(resp -> null);
+    }
+
+    // ==================== Site Configuration ====================
+
+    public CompletableFuture<SiteConfig> getSiteConfig(String domain) {
+        return request("GET", "/sites/" + encode(domain) + "/config", null)
+                .thenApply(resp -> gson.fromJson(resp, SiteConfig.class));
+    }
+
+    public CompletableFuture<SiteConfig> updateSiteConfig(String domain, Map<String, Object> config) {
+        return request("PATCH", "/sites/" + encode(domain) + "/config", config)
+                .thenApply(resp -> gson.fromJson(resp, SiteConfig.class));
+    }
+
+    public CompletableFuture<Long> purgeCache(String domain, List<String> paths) {
+        Map<String, Object> body = new HashMap<>();
+        if (paths != null) body.put("paths", paths);
+        return request("DELETE", "/sites/" + encode(domain) + "/cache", body)
+                .thenApply(resp -> {
+                    Map<String, Object> map = gson.fromJson(resp, new TypeToken<Map<String, Object>>(){}.getType());
+                    return ((Number) map.get("purged")).longValue();
+                });
+    }
+
+    // ==================== Analytics ====================
+
+    public CompletableFuture<AnalyticsData> getAnalytics(String domain, AnalyticsOptions options) {
+        StringBuilder path = new StringBuilder("/sites/" + encode(domain) + "/analytics");
+        if (options != null) {
+            StringBuilder params = new StringBuilder();
+            if (options.getPeriod() != null) params.append("period=").append(encode(options.getPeriod()));
+            if (options.getStart() != null) {
+                if (params.length() > 0) params.append("&");
+                params.append("start=").append(encode(options.getStart()));
+            }
+            if (options.getEnd() != null) {
+                if (params.length() > 0) params.append("&");
+                params.append("end=").append(encode(options.getEnd()));
+            }
+            if (params.length() > 0) path.append("?").append(params);
+        }
+        return request("GET", path.toString(), null)
+                .thenApply(resp -> gson.fromJson(resp, AnalyticsData.class));
+    }
+
+    // ==================== Lifecycle ====================
+
+    @Override
+    public void close() {
+        closed.set(true);
+    }
+
+    public boolean isClosed() {
+        return closed.get();
+    }
+
+    public CompletableFuture<Boolean> healthCheck() {
+        return request("GET", "/health", null)
+                .thenApply(resp -> {
+                    Map<String, Object> map = gson.fromJson(resp, new TypeToken<Map<String, Object>>(){}.getType());
+                    return "healthy".equals(map.get("status"));
+                })
+                .exceptionally(e -> false);
+    }
+
+    // ==================== Private Methods ====================
+
+    private CompletableFuture<String> request(String method, String path, Object body) {
+        if (closed.get()) {
+            return CompletableFuture.failedFuture(new HostingException("Client has been closed"));
+        }
+
+        return doRequest(method, path, body, 0);
+    }
+
+    private CompletableFuture<String> doRequest(String method, String path, Object body, int attempt) {
+        String url = config.getEndpoint() + path;
+
+        HttpRequest.Builder requestBuilder = HttpRequest.newBuilder()
+                .uri(URI.create(url))
+                .header("Authorization", "Bearer " + config.getApiKey())
+                .header("Content-Type", "application/json")
+                .header("X-SDK-Version", "java/0.1.0")
+                .timeout(Duration.ofSeconds(config.getTimeoutSecs()));
+
+        HttpRequest.BodyPublisher bodyPublisher = body != null
+                ? HttpRequest.BodyPublishers.ofString(gson.toJson(body))
+                : HttpRequest.BodyPublishers.noBody();
+
+        switch (method) {
+            case "GET": requestBuilder.GET(); break;
+            case "POST": requestBuilder.POST(bodyPublisher); break;
+            case "PUT": requestBuilder.PUT(bodyPublisher); break;
+            case "PATCH": requestBuilder.method("PATCH", bodyPublisher); break;
+            case "DELETE": requestBuilder.method("DELETE", bodyPublisher); break;
+        }
+
+        return httpClient.sendAsync(requestBuilder.build(), HttpResponse.BodyHandlers.ofString())
+                .thenCompose(response -> {
+                    if (response.statusCode() >= 400) {
+                        Map<String, Object> errorBody = gson.fromJson(response.body(),
+                                new TypeToken<Map<String, Object>>(){}.getType());
+                        String message = errorBody != null && errorBody.get("message") != null
+                                ? (String) errorBody.get("message") : "HTTP " + response.statusCode();
+                        return CompletableFuture.failedFuture(
+                                new HostingException(message, (String) errorBody.get("code"), response.statusCode()));
+                    }
+                    return CompletableFuture.completedFuture(response.body());
+                })
+                .exceptionally(e -> {
+                    if (attempt < config.getRetries() - 1) {
+                        try { Thread.sleep((long) Math.pow(2, attempt) * 1000); }
+                        catch (InterruptedException ie) { Thread.currentThread().interrupt(); }
+                        return doRequest(method, path, body, attempt + 1).join();
+                    }
+                    throw new RuntimeException(e);
+                });
+    }
+
+    private static String encode(String value) {
+        return java.net.URLEncoder.encode(value, java.nio.charset.StandardCharsets.UTF_8);
+    }
+
+    // Helper response types
+    private static class DomainsResponse { List<Domain> domains; }
+    private static class DeploymentsResponse { List<Deployment> deployments; }
+}

sdk/java/src/main/java/io/synor/hosting/Types.java

@@ -0,0 +1,330 @@
+package io.synor.hosting;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * Hosting SDK Types for Java.
+ */
+public class Types {
+    // Organizational class
+}
+
+// ==================== Config ====================
+
+class HostingConfig {
+    private final String apiKey;
+    private final String endpoint;
+    private final int timeoutSecs;
+    private final int retries;
+    private final boolean debug;
+
+    public HostingConfig(String apiKey) {
+        this(apiKey, "https://hosting.synor.io/v1", 60, 3, false);
+    }
+
+    public HostingConfig(String apiKey, String endpoint, int timeoutSecs, int retries, boolean debug) {
+        this.apiKey = apiKey;
+        this.endpoint = endpoint;
+        this.timeoutSecs = timeoutSecs;
+        this.retries = retries;
+        this.debug = debug;
+    }
+
+    public String getApiKey() { return apiKey; }
+    public String getEndpoint() { return endpoint; }
+    public int getTimeoutSecs() { return timeoutSecs; }
+    public int getRetries() { return retries; }
+    public boolean isDebug() { return debug; }
+}
+
+// ==================== Domain Types ====================
+
+enum DomainStatus { pending, active, expired, suspended }
+
+class Domain {
+    private String name;
+    private DomainStatus status;
+    private String owner;
+    private long registeredAt;
+    private long expiresAt;
+    private boolean autoRenew;
+    private DomainRecord records;
+
+    public String getName() { return name; }
+    public DomainStatus getStatus() { return status; }
+    public String getOwner() { return owner; }
+    public long getRegisteredAt() { return registeredAt; }
+    public long getExpiresAt() { return expiresAt; }
+    public boolean isAutoRenew() { return autoRenew; }
+    public DomainRecord getRecords() { return records; }
+}
+
+class DomainRecord {
+    private String cid;
+    private List<String> ipv4;
+    private List<String> ipv6;
+    private String cname;
+    private List<String> txt;
+    private Map<String, String> metadata;
+
+    public String getCid() { return cid; }
+    public List<String> getIpv4() { return ipv4; }
+    public List<String> getIpv6() { return ipv6; }
+    public String getCname() { return cname; }
+    public List<String> getTxt() { return txt; }
+    public Map<String, String> getMetadata() { return metadata; }
+
+    public void setCid(String cid) { this.cid = cid; }
+    public void setIpv4(List<String> ipv4) { this.ipv4 = ipv4; }
+    public void setIpv6(List<String> ipv6) { this.ipv6 = ipv6; }
+    public void setCname(String cname) { this.cname = cname; }
+    public void setTxt(List<String> txt) { this.txt = txt; }
+    public void setMetadata(Map<String, String> metadata) { this.metadata = metadata; }
+}
+
+class DomainAvailability {
+    private String name;
+    private boolean available;
+    private Double price;
+    private boolean premium;
+
+    public String getName() { return name; }
+    public boolean isAvailable() { return available; }
+    public Double getPrice() { return price; }
+    public boolean isPremium() { return premium; }
+}
+
+class RegisterDomainOptions {
+    private Integer years;
+    private Boolean autoRenew;
+
+    public Integer getYears() { return years; }
+    public Boolean getAutoRenew() { return autoRenew; }
+    public void setYears(Integer years) { this.years = years; }
+    public void setAutoRenew(Boolean autoRenew) { this.autoRenew = autoRenew; }
+}
+
+// ==================== DNS Types ====================
+
+enum DnsRecordType { A, AAAA, CNAME, TXT, MX, NS, SRV, CAA }
+
+class DnsRecord {
+    private DnsRecordType type;
+    private String name;
+    private String value;
+    private int ttl = 3600;
+    private Integer priority;
+
+    public DnsRecordType getType() { return type; }
+    public String getName() { return name; }
+    public String getValue() { return value; }
+    public int getTtl() { return ttl; }
+    public Integer getPriority() { return priority; }
+
+    public void setType(DnsRecordType type) { this.type = type; }
+    public void setName(String name) { this.name = name; }
+    public void setValue(String value) { this.value = value; }
+    public void setTtl(int ttl) { this.ttl = ttl; }
+    public void setPriority(Integer priority) { this.priority = priority; }
+}
+
+class DnsZone {
+    private String domain;
+    private List<DnsRecord> records;
+    private long updatedAt;
+
+    public String getDomain() { return domain; }
+    public List<DnsRecord> getRecords() { return records; }
+    public long getUpdatedAt() { return updatedAt; }
+}
+
+// ==================== Deployment Types ====================
+
+enum DeploymentStatus { pending, building, deploying, active, failed, inactive }
+
+class Deployment {
+    private String id;
+    private String domain;
+    private String cid;
+    private DeploymentStatus status;
+    private String url;
+    private long createdAt;
+    private long updatedAt;
+    private String buildLogs;
+    private String errorMessage;
+
+    public String getId() { return id; }
+    public String getDomain() { return domain; }
+    public String getCid() { return cid; }
+    public DeploymentStatus getStatus() { return status; }
+    public String getUrl() { return url; }
+    public long getCreatedAt() { return createdAt; }
+    public long getUpdatedAt() { return updatedAt; }
+    public String getBuildLogs() { return buildLogs; }
+    public String getErrorMessage() { return errorMessage; }
+}
+
+class DeployOptions {
+    private String domain;
+    private String subdomain;
+    private Boolean spa;
+    private Boolean cleanUrls;
+    private Boolean trailingSlash;
+
+    public String getDomain() { return domain; }
+    public String getSubdomain() { return subdomain; }
+    public Boolean getSpa() { return spa; }
+    public Boolean getCleanUrls() { return cleanUrls; }
+    public Boolean getTrailingSlash() { return trailingSlash; }
+
+    public void setDomain(String domain) { this.domain = domain; }
+    public void setSubdomain(String subdomain) { this.subdomain = subdomain; }
+    public void setSpa(Boolean spa) { this.spa = spa; }
+    public void setCleanUrls(Boolean cleanUrls) { this.cleanUrls = cleanUrls; }
+    public void setTrailingSlash(Boolean trailingSlash) { this.trailingSlash = trailingSlash; }
+}
+
+// ==================== SSL Types ====================
+
+enum CertificateStatus { pending, issued, expired, revoked }
+
+class Certificate {
+    private String domain;
+    private CertificateStatus status;
+    private boolean autoRenew;
+    private String issuer;
+    private Long issuedAt;
+    private Long expiresAt;
+    private String fingerprint;
+
+    public String getDomain() { return domain; }
+    public CertificateStatus getStatus() { return status; }
+    public boolean isAutoRenew() { return autoRenew; }
+    public String getIssuer() { return issuer; }
+    public Long getIssuedAt() { return issuedAt; }
+    public Long getExpiresAt() { return expiresAt; }
+    public String getFingerprint() { return fingerprint; }
+}
+
+class ProvisionSslOptions {
+    private Boolean includeWww;
+    private Boolean autoRenew;
+
+    public Boolean getIncludeWww() { return includeWww; }
+    public Boolean getAutoRenew() { return autoRenew; }
+    public void setIncludeWww(Boolean includeWww) { this.includeWww = includeWww; }
+    public void setAutoRenew(Boolean autoRenew) { this.autoRenew = autoRenew; }
+}
+
+// ==================== Site Config ====================
+
+class SiteConfig {
+    private String domain;
+    private String cid;
+    private Map<String, String> headers;
+    private List<RedirectRule> redirects;
+    private Map<String, String> errorPages;
+    private boolean spa;
+    private boolean cleanUrls;
+    private boolean trailingSlash;
+
+    public String getDomain() { return domain; }
+    public String getCid() { return cid; }
+    public Map<String, String> getHeaders() { return headers; }
+    public List<RedirectRule> getRedirects() { return redirects; }
+    public Map<String, String> getErrorPages() { return errorPages; }
+    public boolean isSpa() { return spa; }
+    public boolean isCleanUrls() { return cleanUrls; }
+    public boolean isTrailingSlash() { return trailingSlash; }
+}
+
+class RedirectRule {
+    private String source;
+    private String destination;
+    private int statusCode = 301;
+    private boolean permanent = true;
+
+    public String getSource() { return source; }
+    public String getDestination() { return destination; }
+    public int getStatusCode() { return statusCode; }
+    public boolean isPermanent() { return permanent; }
+}
+
+// ==================== Analytics ====================
+
+class AnalyticsData {
+    private String domain;
+    private String period;
+    private long pageViews;
+    private long uniqueVisitors;
+    private long bandwidth;
+    private List<PageView> topPages;
+    private List<Referrer> topReferrers;
+    private List<Country> topCountries;
+
+    public String getDomain() { return domain; }
+    public String getPeriod() { return period; }
+    public long getPageViews() { return pageViews; }
+    public long getUniqueVisitors() { return uniqueVisitors; }
+    public long getBandwidth() { return bandwidth; }
+    public List<PageView> getTopPages() { return topPages; }
+    public List<Referrer> getTopReferrers() { return topReferrers; }
+    public List<Country> getTopCountries() { return topCountries; }
+}
+
+class PageView {
+    private String path;
+    private long views;
+    public String getPath() { return path; }
+    public long getViews() { return views; }
+}
+
+class Referrer {
+    private String referrer;
+    private long count;
+    public String getReferrer() { return referrer; }
+    public long getCount() { return count; }
+}
+
+class Country {
+    private String country;
+    private long count;
+    public String getCountry() { return country; }
+    public long getCount() { return count; }
+}
+
+class AnalyticsOptions {
+    private String period;
+    private String start;
+    private String end;
+
+    public String getPeriod() { return period; }
+    public String getStart() { return start; }
+    public String getEnd() { return end; }
+    public void setPeriod(String period) { this.period = period; }
+    public void setStart(String start) { this.start = start; }
+    public void setEnd(String end) { this.end = end; }
+}
+
+// ==================== Error ====================
+
+class HostingException extends RuntimeException {
+    private final String code;
+    private final int statusCode;
+
+    public HostingException(String message) {
+        super(message);
+        this.code = null;
+        this.statusCode = 0;
+    }
+
+    public HostingException(String message, String code, int statusCode) {
+        super(message);
+        this.code = code;
+        this.statusCode = statusCode;
+    }
+
+    public String getCode() { return code; }
+    public int getStatusCode() { return statusCode; }
+}

sdk/java/src/main/java/io/synor/rpc/SynorRpc.java

@@ -0,0 +1,226 @@
+package io.synor.rpc;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.net.http.WebSocket;
+import java.time.Duration;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.function.Consumer;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+/**
+ * Synor RPC SDK for Java.
+ *
+ * Query blocks, transactions, and chain state with WebSocket subscription support.
+ *
+ * Example:
+ * <pre>{@code
+ * SynorRpc rpc = new SynorRpc("your-api-key");
+ * Block block = rpc.getLatestBlock().join();
+ * System.out.println("Height: " + block.getHeight());
+ * }</pre>
+ */
+public class SynorRpc implements AutoCloseable {
+    private static final String DEFAULT_ENDPOINT = "https://rpc.synor.cc/api/v1";
+    private static final String DEFAULT_WS_ENDPOINT = "wss://rpc.synor.cc/ws";
+
+    private final RpcConfig config;
+    private final HttpClient httpClient;
+    private final Gson gson;
+    private WebSocket webSocket;
+    private final Map<String, Consumer<String>> subscriptions = new ConcurrentHashMap<>();
+
+    public SynorRpc(String apiKey) {
+        this(RpcConfig.builder().apiKey(apiKey).build());
+    }
+
+    public SynorRpc(RpcConfig config) {
+        this.config = config;
+        this.httpClient = HttpClient.newBuilder()
+            .connectTimeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .build();
+        this.gson = new GsonBuilder()
+            .setFieldNamingPolicy(com.google.gson.FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
+            .create();
+    }
+
+    /** Get a block by hash. */
+    public CompletableFuture<Block> getBlockByHash(String hash) {
+        return get("/blocks/" + hash, Block.class);
+    }
+
+    /** Get a block by height. */
+    public CompletableFuture<Block> getBlockByHeight(long height) {
+        return get("/blocks/height/" + height, Block.class);
+    }
+
+    /** Get the latest block. */
+    public CompletableFuture<Block> getLatestBlock() {
+        return get("/blocks/latest", Block.class);
+    }
+
+    /** Get a block header by hash. */
+    public CompletableFuture<BlockHeader> getBlockHeaderByHash(String hash) {
+        return get("/blocks/" + hash + "/header", BlockHeaderResponse.class)
+            .thenApply(BlockHeaderResponse::getHeader);
+    }
+
+    /** Get a transaction by ID. */
+    public CompletableFuture<Transaction> getTransaction(String txid) {
+        return get("/transactions/" + txid, Transaction.class);
+    }
+
+    /** Send a raw transaction. */
+    public CompletableFuture<String> sendRawTransaction(String rawTx) {
+        var body = Map.of("raw", rawTx);
+        return post("/transactions", body, SendTxResponse.class)
+            .thenApply(SendTxResponse::getTxid);
+    }
+
+    /** Estimate transaction fee. */
+    public CompletableFuture<FeeEstimate> estimateFee(Priority priority) {
+        return get("/fees/estimate?priority=" + priority.getValue(), FeeEstimate.class);
+    }
+
+    /** Get chain information. */
+    public CompletableFuture<ChainInfo> getChainInfo() {
+        return get("/chain", ChainInfo.class);
+    }
+
+    /** Get mempool information. */
+    public CompletableFuture<MempoolInfo> getMempoolInfo() {
+        return get("/mempool", MempoolInfo.class);
+    }
+
+    /** Get UTXOs for an address. */
+    public CompletableFuture<UTXO[]> getUTXOs(String address) {
+        return get("/addresses/" + address + "/utxos", UTXOsResponse.class)
+            .thenApply(UTXOsResponse::getUtxos);
+    }
+
+    /** Get balance for an address. */
+    public CompletableFuture<Balance> getBalance(String address) {
+        return get("/addresses/" + address + "/balance", Balance.class);
+    }
+
+    /** Subscribe to new blocks. */
+    public CompletableFuture<Subscription> subscribeBlocks(Consumer<Block> callback) {
+        return subscribe("blocks", null, data -> {
+            Block block = gson.fromJson(data, BlockNotification.class).getBlock();
+            callback.accept(block);
+        });
+    }
+
+    /** Subscribe to address transactions. */
+    public CompletableFuture<Subscription> subscribeAddress(String address, Consumer<Transaction> callback) {
+        return subscribe("address", Map.of("address", address), data -> {
+            Transaction tx = gson.fromJson(data, TransactionNotification.class).getTransaction();
+            callback.accept(tx);
+        });
+    }
+
+    private CompletableFuture<Subscription> subscribe(String type, Map<String, String> params, Consumer<String> handler) {
+        return ensureWebSocket().thenApply(ws -> {
+            String subId = type + "_" + System.currentTimeMillis();
+            subscriptions.put(subId, handler);
+
+            var msg = new java.util.HashMap<String, Object>();
+            msg.put("type", "subscribe");
+            msg.put("id", subId);
+            msg.put("subscription", type);
+            if (params != null) msg.putAll(params);
+
+            ws.sendText(gson.toJson(msg), true);
+
+            return new Subscription(subId, type, System.currentTimeMillis(), () -> {
+                subscriptions.remove(subId);
+                ws.sendText(gson.toJson(Map.of("type", "unsubscribe", "id", subId)), true);
+            });
+        });
+    }
+
+    private CompletableFuture<WebSocket> ensureWebSocket() {
+        if (webSocket != null) {
+            return CompletableFuture.completedFuture(webSocket);
+        }
+
+        String wsUrl = config.getWsEndpoint() + "?apiKey=" + config.getApiKey() + "&network=" + config.getNetwork().getValue();
+
+        return httpClient.newWebSocketBuilder()
+            .buildAsync(URI.create(wsUrl), new WebSocket.Listener() {
+                @Override
+                public CompletionStage<?> onText(WebSocket ws, CharSequence data, boolean last) {
+                    var msg = gson.fromJson(data.toString(), WsMessage.class);
+                    if (msg.subscriptionId != null && subscriptions.containsKey(msg.subscriptionId)) {
+                        subscriptions.get(msg.subscriptionId).accept(data.toString());
+                    }
+                    return WebSocket.Listener.super.onText(ws, data, last);
+                }
+            })
+            .thenApply(ws -> {
+                this.webSocket = ws;
+                return ws;
+            });
+    }
+
+    private <T> CompletableFuture<T> get(String path, Class<T> responseType) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .header("Content-Type", "application/json")
+            .header("X-Network", config.getNetwork().getValue())
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .GET()
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(response -> handleResponse(response, responseType));
+    }
+
+    private <T> CompletableFuture<T> post(String path, Object body, Class<T> responseType) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .header("Content-Type", "application/json")
+            .header("X-Network", config.getNetwork().getValue())
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .POST(HttpRequest.BodyPublishers.ofString(gson.toJson(body)))
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(response -> handleResponse(response, responseType));
+    }
+
+    private <T> T handleResponse(HttpResponse<String> response, Class<T> responseType) {
+        if (response.statusCode() >= 400) {
+            ErrorResponse error = gson.fromJson(response.body(), ErrorResponse.class);
+            throw new RpcException(
+                error != null ? error.getMessage() : "Unknown error",
+                response.statusCode(),
+                error != null ? error.getCode() : null
+            );
+        }
+        return gson.fromJson(response.body(), responseType);
+    }
+
+    @Override
+    public void close() {
+        if (webSocket != null) {
+            webSocket.sendClose(WebSocket.NORMAL_CLOSURE, "closing");
+        }
+    }
+
+    // Internal types
+    private static class WsMessage { String subscriptionId; String data; }
+    private record BlockHeaderResponse(BlockHeader header) { BlockHeader getHeader() { return header; } }
+    private record SendTxResponse(String txid) { String getTxid() { return txid; } }
+    private record UTXOsResponse(UTXO[] utxos) { UTXO[] getUtxos() { return utxos; } }
+    private record BlockNotification(Block block) { Block getBlock() { return block; } }
+    private record TransactionNotification(Transaction transaction) { Transaction getTransaction() { return transaction; } }
+    private record ErrorResponse(String message, String code) { String getMessage() { return message; } String getCode() { return code; } }
+}

sdk/java/src/main/java/io/synor/rpc/Types.java

@@ -0,0 +1,240 @@
+package io.synor.rpc;
+
+import java.util.List;
+import java.util.concurrent.CompletionStage;
+
+/** Network type. */
+public enum Network {
+    MAINNET("mainnet"), TESTNET("testnet");
+    private final String value;
+    Network(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Transaction priority. */
+public enum Priority {
+    LOW("low"), MEDIUM("medium"), HIGH("high"), URGENT("urgent");
+    private final String value;
+    Priority(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Transaction status. */
+public enum TransactionStatus {
+    PENDING("pending"), CONFIRMED("confirmed"), FAILED("failed"), REPLACED("replaced");
+    private final String value;
+    TransactionStatus(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** RPC configuration. */
+class RpcConfig {
+    private final String apiKey;
+    private final String endpoint;
+    private final String wsEndpoint;
+    private final Network network;
+    private final long timeoutSeconds;
+    private final boolean debug;
+
+    private RpcConfig(Builder builder) {
+        this.apiKey = builder.apiKey;
+        this.endpoint = builder.endpoint;
+        this.wsEndpoint = builder.wsEndpoint;
+        this.network = builder.network;
+        this.timeoutSeconds = builder.timeoutSeconds;
+        this.debug = builder.debug;
+    }
+
+    public String getApiKey() { return apiKey; }
+    public String getEndpoint() { return endpoint; }
+    public String getWsEndpoint() { return wsEndpoint; }
+    public Network getNetwork() { return network; }
+    public long getTimeoutSeconds() { return timeoutSeconds; }
+    public boolean isDebug() { return debug; }
+
+    public static Builder builder() { return new Builder(); }
+
+    public static class Builder {
+        private String apiKey;
+        private String endpoint = "https://rpc.synor.cc/api/v1";
+        private String wsEndpoint = "wss://rpc.synor.cc/ws";
+        private Network network = Network.MAINNET;
+        private long timeoutSeconds = 30;
+        private boolean debug = false;
+
+        public Builder apiKey(String apiKey) { this.apiKey = apiKey; return this; }
+        public Builder endpoint(String endpoint) { this.endpoint = endpoint; return this; }
+        public Builder wsEndpoint(String wsEndpoint) { this.wsEndpoint = wsEndpoint; return this; }
+        public Builder network(Network network) { this.network = network; return this; }
+        public Builder timeoutSeconds(long seconds) { this.timeoutSeconds = seconds; return this; }
+        public Builder debug(boolean debug) { this.debug = debug; return this; }
+        public RpcConfig build() { return new RpcConfig(this); }
+    }
+}
+
+/** Block header. */
+class BlockHeader {
+    private String hash;
+    private long height;
+    private int version;
+    private String previousHash;
+    private String merkleRoot;
+    private long timestamp;
+    private String difficulty;
+    private long nonce;
+
+    public String getHash() { return hash; }
+    public long getHeight() { return height; }
+    public int getVersion() { return version; }
+    public String getPreviousHash() { return previousHash; }
+    public String getMerkleRoot() { return merkleRoot; }
+    public long getTimestamp() { return timestamp; }
+    public String getDifficulty() { return difficulty; }
+    public long getNonce() { return nonce; }
+}
+
+/** Full block. */
+class Block extends BlockHeader {
+    private List<String> transactions;
+    private int size;
+    private int weight;
+    private int txCount;
+
+    public List<String> getTransactions() { return transactions; }
+    public int getSize() { return size; }
+    public int getWeight() { return weight; }
+    public int getTxCount() { return txCount; }
+}
+
+/** Transaction. */
+class Transaction {
+    private String txid;
+    private String blockHash;
+    private long blockHeight;
+    private int confirmations;
+    private long timestamp;
+    private TransactionStatus status;
+    private String raw;
+    private int size;
+    private String fee;
+
+    public String getTxid() { return txid; }
+    public String getBlockHash() { return blockHash; }
+    public long getBlockHeight() { return blockHeight; }
+    public int getConfirmations() { return confirmations; }
+    public long getTimestamp() { return timestamp; }
+    public TransactionStatus getStatus() { return status; }
+    public String getRaw() { return raw; }
+    public int getSize() { return size; }
+    public String getFee() { return fee; }
+}
+
+/** Fee estimate. */
+class FeeEstimate {
+    private Priority priority;
+    private String feeRate;
+    private int estimatedBlocks;
+
+    public Priority getPriority() { return priority; }
+    public String getFeeRate() { return feeRate; }
+    public int getEstimatedBlocks() { return estimatedBlocks; }
+}
+
+/** Chain information. */
+class ChainInfo {
+    private String chain;
+    private String network;
+    private long height;
+    private String bestBlockHash;
+    private String difficulty;
+    private long medianTime;
+    private String chainWork;
+    private boolean syncing;
+    private double syncProgress;
+
+    public String getChain() { return chain; }
+    public String getNetwork() { return network; }
+    public long getHeight() { return height; }
+    public String getBestBlockHash() { return bestBlockHash; }
+    public String getDifficulty() { return difficulty; }
+    public long getMedianTime() { return medianTime; }
+    public String getChainWork() { return chainWork; }
+    public boolean isSyncing() { return syncing; }
+    public double getSyncProgress() { return syncProgress; }
+}
+
+/** Mempool information. */
+class MempoolInfo {
+    private int size;
+    private long bytes;
+    private long usage;
+    private long maxMempool;
+    private String minFee;
+
+    public int getSize() { return size; }
+    public long getBytes() { return bytes; }
+    public long getUsage() { return usage; }
+    public long getMaxMempool() { return maxMempool; }
+    public String getMinFee() { return minFee; }
+}
+
+/** UTXO. */
+class UTXO {
+    private String txid;
+    private int vout;
+    private String amount;
+    private String address;
+    private int confirmations;
+
+    public String getTxid() { return txid; }
+    public int getVout() { return vout; }
+    public String getAmount() { return amount; }
+    public String getAddress() { return address; }
+    public int getConfirmations() { return confirmations; }
+}
+
+/** Balance. */
+class Balance {
+    private String confirmed;
+    private String unconfirmed;
+    private String total;
+
+    public String getConfirmed() { return confirmed; }
+    public String getUnconfirmed() { return unconfirmed; }
+    public String getTotal() { return total; }
+}
+
+/** Subscription. */
+class Subscription {
+    private final String id;
+    private final String type;
+    private final long createdAt;
+    private final Runnable unsubscribe;
+
+    public Subscription(String id, String type, long createdAt, Runnable unsubscribe) {
+        this.id = id;
+        this.type = type;
+        this.createdAt = createdAt;
+        this.unsubscribe = unsubscribe;
+    }
+
+    public String getId() { return id; }
+    public String getType() { return type; }
+    public long getCreatedAt() { return createdAt; }
+    public void unsubscribe() { unsubscribe.run(); }
+}
+
+/** RPC exception. */
+class RpcException extends RuntimeException {
+    private final int statusCode;
+    private final String code;
+
+    public RpcException(String message, int statusCode, String code) {
+        super(message);
+        this.statusCode = statusCode;
+        this.code = code;
+    }
+
+    public int getStatusCode() { return statusCode; }
+    public String getCode() { return code; }
+}

sdk/java/src/main/java/io/synor/storage/SynorStorage.java

@@ -0,0 +1,237 @@
+package io.synor.storage;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.Base64;
+import java.util.List;
+import java.util.Map;
+import java.util.concurrent.CompletableFuture;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+/**
+ * Synor Storage SDK for Java.
+ *
+ * Decentralized storage, pinning, and content retrieval.
+ *
+ * Example:
+ * <pre>{@code
+ * SynorStorage storage = new SynorStorage("your-api-key");
+ * UploadResponse result = storage.upload("Hello, World!".getBytes()).join();
+ * System.out.println("CID: " + result.getCid());
+ * }</pre>
+ */
+public class SynorStorage {
+    private static final String DEFAULT_ENDPOINT = "https://storage.synor.cc/api/v1";
+    private static final String DEFAULT_GATEWAY = "https://gateway.synor.cc";
+
+    private final StorageConfig config;
+    private final HttpClient httpClient;
+    private final Gson gson;
+
+    public SynorStorage(String apiKey) {
+        this(StorageConfig.builder().apiKey(apiKey).build());
+    }
+
+    public SynorStorage(StorageConfig config) {
+        this.config = config;
+        this.httpClient = HttpClient.newBuilder()
+            .connectTimeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .build();
+        this.gson = new GsonBuilder()
+            .setFieldNamingPolicy(com.google.gson.FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
+            .create();
+    }
+
+    /** Upload content. */
+    public CompletableFuture<UploadResponse> upload(byte[] data) {
+        return upload(data, UploadOptions.defaults());
+    }
+
+    /** Upload content with options. */
+    public CompletableFuture<UploadResponse> upload(byte[] data, UploadOptions options) {
+        String boundary = "----SynorBoundary" + System.currentTimeMillis();
+        String body = "--" + boundary + "\r\n"
+            + "Content-Disposition: form-data; name=\"file\"; filename=\"file\"\r\n"
+            + "Content-Type: application/octet-stream\r\n\r\n"
+            + new String(data) + "\r\n"
+            + "--" + boundary + "--\r\n";
+
+        StringBuilder path = new StringBuilder("/upload?");
+        path.append("pin=").append(options.isPin());
+        if (options.isWrapWithDirectory()) path.append("&wrapWithDirectory=true");
+        path.append("&cidVersion=").append(options.getCidVersion());
+        path.append("&hashAlgorithm=").append(options.getHashAlgorithm().getValue());
+
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .header("Content-Type", "multipart/form-data; boundary=" + boundary)
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .POST(HttpRequest.BodyPublishers.ofString(body))
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(response -> handleResponse(response, UploadResponse.class));
+    }
+
+    /** Download content by CID. */
+    public CompletableFuture<byte[]> download(String cid) {
+        return download(cid, DownloadOptions.defaults());
+    }
+
+    /** Download content with options. */
+    public CompletableFuture<byte[]> download(String cid, DownloadOptions options) {
+        StringBuilder path = new StringBuilder("/content/" + cid);
+        if (options.getOffset() != null || options.getLength() != null) {
+            path.append("?");
+            if (options.getOffset() != null) path.append("offset=").append(options.getOffset()).append("&");
+            if (options.getLength() != null) path.append("length=").append(options.getLength());
+        }
+
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .GET()
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofByteArray())
+            .thenApply(response -> {
+                if (response.statusCode() >= 400) {
+                    throw new StorageException("Download failed", response.statusCode(), null);
+                }
+                return response.body();
+            });
+    }
+
+    /** Pin content. */
+    public CompletableFuture<Pin> pin(PinRequest pinRequest) {
+        return post("/pins", pinRequest, Pin.class);
+    }
+
+    /** Unpin content. */
+    public CompletableFuture<Void> unpin(String cid) {
+        return delete("/pins/" + cid);
+    }
+
+    /** Get pin status. */
+    public CompletableFuture<Pin> getPinStatus(String cid) {
+        return get("/pins/" + cid, Pin.class);
+    }
+
+    /** List pins. */
+    public CompletableFuture<ListPinsResponse> listPins(ListPinsOptions options) {
+        StringBuilder path = new StringBuilder("/pins?");
+        if (options.getLimit() != null) path.append("limit=").append(options.getLimit()).append("&");
+        if (options.getOffset() != null) path.append("offset=").append(options.getOffset());
+        return get(path.toString(), ListPinsResponse.class);
+    }
+
+    /** Get gateway URL. */
+    public GatewayUrl getGatewayUrl(String cid, String path) {
+        String fullPath = path != null ? "/" + cid + "/" + path : "/" + cid;
+        return new GatewayUrl(config.getGateway() + "/ipfs" + fullPath, cid, path);
+    }
+
+    /** Create CAR file. */
+    public CompletableFuture<CarFile> createCar(List<FileEntry> files) {
+        return post("/car/create", Map.of("files", files), CarFile.class);
+    }
+
+    /** Import CAR file. */
+    public CompletableFuture<ImportCarResponse> importCar(byte[] carData, boolean pin) {
+        String encoded = Base64.getEncoder().encodeToString(carData);
+        return post("/car/import", Map.of("car", encoded, "pin", pin), ImportCarResponse.class);
+    }
+
+    /** Create directory. */
+    public CompletableFuture<UploadResponse> createDirectory(List<FileEntry> files) {
+        return post("/directory", Map.of("files", files), UploadResponse.class);
+    }
+
+    /** List directory. */
+    public CompletableFuture<List<DirectoryEntry>> listDirectory(String cid, String path) {
+        String apiPath = "/directory/" + cid + (path != null ? "?path=" + path : "");
+        return get(apiPath, ListDirectoryResponse.class)
+            .thenApply(ListDirectoryResponse::getEntries);
+    }
+
+    /** Get storage stats. */
+    public CompletableFuture<StorageStats> getStats() {
+        return get("/stats", StorageStats.class);
+    }
+
+    /** Check if content exists. */
+    public CompletableFuture<Boolean> exists(String cid) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + "/content/" + cid))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .method("HEAD", HttpRequest.BodyPublishers.noBody())
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.discarding())
+            .thenApply(response -> response.statusCode() == 200);
+    }
+
+    private <T> CompletableFuture<T> get(String path, Class<T> responseType) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .header("Content-Type", "application/json")
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .GET()
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(response -> handleResponse(response, responseType));
+    }
+
+    private <T> CompletableFuture<T> post(String path, Object body, Class<T> responseType) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .header("Content-Type", "application/json")
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .POST(HttpRequest.BodyPublishers.ofString(gson.toJson(body)))
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(response -> handleResponse(response, responseType));
+    }
+
+    private CompletableFuture<Void> delete(String path) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .DELETE()
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.discarding())
+            .thenApply(response -> {
+                if (response.statusCode() >= 400) {
+                    throw new StorageException("Delete failed", response.statusCode(), null);
+                }
+                return null;
+            });
+    }
+
+    private <T> T handleResponse(HttpResponse<String> response, Class<T> responseType) {
+        if (response.statusCode() >= 400) {
+            ErrorResponse error = gson.fromJson(response.body(), ErrorResponse.class);
+            throw new StorageException(
+                error != null ? error.getMessage() : "Unknown error",
+                response.statusCode(),
+                error != null ? error.getCode() : null
+            );
+        }
+        return gson.fromJson(response.body(), responseType);
+    }
+
+    private record ListDirectoryResponse(List<DirectoryEntry> entries) { List<DirectoryEntry> getEntries() { return entries; } }
+    private record ErrorResponse(String message, String code) { String getMessage() { return message; } String getCode() { return code; } }
+}

sdk/java/src/main/java/io/synor/storage/Types.java

@@ -0,0 +1,285 @@
+package io.synor.storage;
+
+import java.util.List;
+
+/** Pin status. */
+public enum PinStatus {
+    QUEUED("queued"), PINNING("pinning"), PINNED("pinned"), FAILED("failed"), UNPINNED("unpinned");
+    private final String value;
+    PinStatus(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Hash algorithm. */
+public enum HashAlgorithm {
+    SHA2_256("sha2-256"), BLAKE3("blake3");
+    private final String value;
+    HashAlgorithm(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Entry type. */
+public enum EntryType {
+    FILE("file"), DIRECTORY("directory");
+    private final String value;
+    EntryType(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Storage configuration. */
+class StorageConfig {
+    private final String apiKey;
+    private final String endpoint;
+    private final String gateway;
+    private final long timeoutSeconds;
+    private final boolean debug;
+
+    private StorageConfig(Builder builder) {
+        this.apiKey = builder.apiKey;
+        this.endpoint = builder.endpoint;
+        this.gateway = builder.gateway;
+        this.timeoutSeconds = builder.timeoutSeconds;
+        this.debug = builder.debug;
+    }
+
+    public String getApiKey() { return apiKey; }
+    public String getEndpoint() { return endpoint; }
+    public String getGateway() { return gateway; }
+    public long getTimeoutSeconds() { return timeoutSeconds; }
+    public boolean isDebug() { return debug; }
+
+    public static Builder builder() { return new Builder(); }
+
+    public static class Builder {
+        private String apiKey;
+        private String endpoint = "https://storage.synor.cc/api/v1";
+        private String gateway = "https://gateway.synor.cc";
+        private long timeoutSeconds = 30;
+        private boolean debug = false;
+
+        public Builder apiKey(String apiKey) { this.apiKey = apiKey; return this; }
+        public Builder endpoint(String endpoint) { this.endpoint = endpoint; return this; }
+        public Builder gateway(String gateway) { this.gateway = gateway; return this; }
+        public Builder timeoutSeconds(long seconds) { this.timeoutSeconds = seconds; return this; }
+        public Builder debug(boolean debug) { this.debug = debug; return this; }
+        public StorageConfig build() { return new StorageConfig(this); }
+    }
+}
+
+/** Upload options. */
+class UploadOptions {
+    private boolean pin = true;
+    private boolean wrapWithDirectory = false;
+    private int cidVersion = 1;
+    private HashAlgorithm hashAlgorithm = HashAlgorithm.SHA2_256;
+
+    public static UploadOptions defaults() { return new UploadOptions(); }
+
+    public boolean isPin() { return pin; }
+    public boolean isWrapWithDirectory() { return wrapWithDirectory; }
+    public int getCidVersion() { return cidVersion; }
+    public HashAlgorithm getHashAlgorithm() { return hashAlgorithm; }
+
+    public UploadOptions pin(boolean pin) { this.pin = pin; return this; }
+    public UploadOptions wrapWithDirectory(boolean wrap) { this.wrapWithDirectory = wrap; return this; }
+    public UploadOptions cidVersion(int version) { this.cidVersion = version; return this; }
+    public UploadOptions hashAlgorithm(HashAlgorithm algo) { this.hashAlgorithm = algo; return this; }
+}
+
+/** Download options. */
+class DownloadOptions {
+    private Long offset;
+    private Long length;
+
+    public static DownloadOptions defaults() { return new DownloadOptions(); }
+
+    public Long getOffset() { return offset; }
+    public Long getLength() { return length; }
+
+    public DownloadOptions offset(long offset) { this.offset = offset; return this; }
+    public DownloadOptions length(long length) { this.length = length; return this; }
+}
+
+/** Upload response. */
+class UploadResponse {
+    private String cid;
+    private long size;
+    private String name;
+    private String hash;
+
+    public String getCid() { return cid; }
+    public long getSize() { return size; }
+    public String getName() { return name; }
+    public String getHash() { return hash; }
+}
+
+/** Pin. */
+class Pin {
+    private String cid;
+    private PinStatus status;
+    private String name;
+    private Long size;
+    private Long createdAt;
+    private Long expiresAt;
+    private List<String> delegates;
+
+    public String getCid() { return cid; }
+    public PinStatus getStatus() { return status; }
+    public String getName() { return name; }
+    public Long getSize() { return size; }
+    public Long getCreatedAt() { return createdAt; }
+    public Long getExpiresAt() { return expiresAt; }
+    public List<String> getDelegates() { return delegates; }
+}
+
+/** Pin request. */
+class PinRequest {
+    private String cid;
+    private String name;
+    private Long duration;
+    private List<String> origins;
+
+    public PinRequest(String cid) { this.cid = cid; }
+
+    public PinRequest name(String name) { this.name = name; return this; }
+    public PinRequest duration(long duration) { this.duration = duration; return this; }
+    public PinRequest origins(List<String> origins) { this.origins = origins; return this; }
+}
+
+/** List pins options. */
+class ListPinsOptions {
+    private Integer limit;
+    private Integer offset;
+    private List<PinStatus> status;
+    private String name;
+
+    public Integer getLimit() { return limit; }
+    public Integer getOffset() { return offset; }
+
+    public ListPinsOptions limit(int limit) { this.limit = limit; return this; }
+    public ListPinsOptions offset(int offset) { this.offset = offset; return this; }
+}
+
+/** List pins response. */
+class ListPinsResponse {
+    private List<Pin> pins;
+    private int total;
+    private boolean hasMore;
+
+    public List<Pin> getPins() { return pins; }
+    public int getTotal() { return total; }
+    public boolean isHasMore() { return hasMore; }
+}
+
+/** Gateway URL. */
+class GatewayUrl {
+    private final String url;
+    private final String cid;
+    private final String path;
+
+    public GatewayUrl(String url, String cid, String path) {
+        this.url = url;
+        this.cid = cid;
+        this.path = path;
+    }
+
+    public String getUrl() { return url; }
+    public String getCid() { return cid; }
+    public String getPath() { return path; }
+}
+
+/** File entry. */
+class FileEntry {
+    private String name;
+    private String content;
+    private String cid;
+
+    public FileEntry(String name) { this.name = name; }
+
+    public FileEntry content(byte[] content) {
+        this.content = java.util.Base64.getEncoder().encodeToString(content);
+        return this;
+    }
+    public FileEntry cid(String cid) { this.cid = cid; return this; }
+}
+
+/** Directory entry. */
+class DirectoryEntry {
+    private String name;
+    private String cid;
+    private Long size;
+    private EntryType type;
+
+    public String getName() { return name; }
+    public String getCid() { return cid; }
+    public Long getSize() { return size; }
+    public EntryType getType() { return type; }
+}
+
+/** CAR block. */
+class CarBlock {
+    private String cid;
+    private String data;
+    private Long size;
+
+    public String getCid() { return cid; }
+    public String getData() { return data; }
+    public Long getSize() { return size; }
+}
+
+/** CAR file. */
+class CarFile {
+    private int version;
+    private List<String> roots;
+    private List<CarBlock> blocks;
+    private Long size;
+
+    public int getVersion() { return version; }
+    public List<String> getRoots() { return roots; }
+    public List<CarBlock> getBlocks() { return blocks; }
+    public Long getSize() { return size; }
+}
+
+/** Import CAR response. */
+class ImportCarResponse {
+    private List<String> roots;
+    private int blocksImported;
+
+    public List<String> getRoots() { return roots; }
+    public int getBlocksImported() { return blocksImported; }
+}
+
+/** Storage stats. */
+class StorageStats {
+    private long totalSize;
+    private int pinCount;
+    private BandwidthStats bandwidth;
+
+    public long getTotalSize() { return totalSize; }
+    public int getPinCount() { return pinCount; }
+    public BandwidthStats getBandwidth() { return bandwidth; }
+}
+
+/** Bandwidth stats. */
+class BandwidthStats {
+    private long upload;
+    private long download;
+
+    public long getUpload() { return upload; }
+    public long getDownload() { return download; }
+}
+
+/** Storage exception. */
+class StorageException extends RuntimeException {
+    private final int statusCode;
+    private final String code;
+
+    public StorageException(String message, int statusCode, String code) {
+        super(message);
+        this.statusCode = statusCode;
+        this.code = code;
+    }
+
+    public int getStatusCode() { return statusCode; }
+    public String getCode() { return code; }
+}

sdk/java/src/main/java/io/synor/wallet/SynorWallet.java

@@ -0,0 +1,163 @@
+package io.synor.wallet;
+
+import java.net.URI;
+import java.net.http.HttpClient;
+import java.net.http.HttpRequest;
+import java.net.http.HttpResponse;
+import java.time.Duration;
+import java.util.concurrent.CompletableFuture;
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+
+/**
+ * Synor Wallet SDK for Java.
+ *
+ * Manage wallets, sign transactions, and query balances on the Synor blockchain.
+ *
+ * Example:
+ * <pre>{@code
+ * SynorWallet wallet = new SynorWallet("your-api-key");
+ * CreateWalletResult result = wallet.createWallet(WalletType.STANDARD).join();
+ * System.out.println("Address: " + result.getWallet().getAddress());
+ * }</pre>
+ */
+public class SynorWallet {
+    private static final String DEFAULT_ENDPOINT = "https://wallet.synor.cc/api/v1";
+    private static final Duration DEFAULT_TIMEOUT = Duration.ofSeconds(30);
+
+    private final WalletConfig config;
+    private final HttpClient httpClient;
+    private final Gson gson;
+
+    public SynorWallet(String apiKey) {
+        this(WalletConfig.builder().apiKey(apiKey).build());
+    }
+
+    public SynorWallet(WalletConfig config) {
+        this.config = config;
+        this.httpClient = HttpClient.newBuilder()
+            .connectTimeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .build();
+        this.gson = new GsonBuilder()
+            .setFieldNamingPolicy(com.google.gson.FieldNamingPolicy.LOWER_CASE_WITH_UNDERSCORES)
+            .create();
+    }
+
+    /**
+     * Create a new wallet.
+     */
+    public CompletableFuture<CreateWalletResult> createWallet(WalletType type) {
+        var body = new CreateWalletRequest(type, config.getNetwork());
+        return post("/wallets", body, CreateWalletResult.class);
+    }
+
+    /**
+     * Import a wallet from mnemonic.
+     */
+    public CompletableFuture<Wallet> importWallet(String mnemonic, String passphrase, WalletType type) {
+        var body = new ImportWalletRequest(mnemonic, passphrase, type, config.getNetwork());
+        return post("/wallets/import", body, WalletResponse.class)
+            .thenApply(WalletResponse::getWallet);
+    }
+
+    /**
+     * Get a wallet by ID.
+     */
+    public CompletableFuture<Wallet> getWallet(String walletId) {
+        return get("/wallets/" + walletId, WalletResponse.class)
+            .thenApply(WalletResponse::getWallet);
+    }
+
+    /**
+     * Sign a transaction.
+     */
+    public CompletableFuture<SignedTransaction> signTransaction(String walletId, Transaction tx) {
+        var body = new SignTransactionRequest(tx);
+        return post("/wallets/" + walletId + "/sign", body, SignedTransactionResponse.class)
+            .thenApply(SignedTransactionResponse::getSignedTransaction);
+    }
+
+    /**
+     * Sign a message.
+     */
+    public CompletableFuture<SignedMessage> signMessage(String walletId, String message, String format) {
+        var body = new SignMessageRequest(message, format != null ? format : "text");
+        return post("/wallets/" + walletId + "/sign-message", body, SignedMessage.class);
+    }
+
+    /**
+     * Get balance for an address.
+     */
+    public CompletableFuture<BalanceResponse> getBalance(String address, boolean includeTokens) {
+        String path = "/balances/" + address + "?includeTokens=" + includeTokens;
+        return get(path, BalanceResponse.class);
+    }
+
+    /**
+     * Get UTXOs for an address.
+     */
+    public CompletableFuture<UTXO[]> getUTXOs(String address) {
+        return get("/utxos/" + address, UTXOsResponse.class)
+            .thenApply(UTXOsResponse::getUtxos);
+    }
+
+    /**
+     * Estimate transaction fee.
+     */
+    public CompletableFuture<FeeEstimate> estimateFee(Priority priority) {
+        String path = "/fees/estimate?priority=" + priority.getValue();
+        return get(path, FeeEstimate.class);
+    }
+
+    private <T> CompletableFuture<T> get(String path, Class<T> responseType) {
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .header("Content-Type", "application/json")
+            .header("X-Network", config.getNetwork().getValue())
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .GET()
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(response -> handleResponse(response, responseType));
+    }
+
+    private <T> CompletableFuture<T> post(String path, Object body, Class<T> responseType) {
+        String jsonBody = gson.toJson(body);
+
+        HttpRequest request = HttpRequest.newBuilder()
+            .uri(URI.create(config.getEndpoint() + path))
+            .header("Authorization", "Bearer " + config.getApiKey())
+            .header("Content-Type", "application/json")
+            .header("X-Network", config.getNetwork().getValue())
+            .timeout(Duration.ofSeconds(config.getTimeoutSeconds()))
+            .POST(HttpRequest.BodyPublishers.ofString(jsonBody))
+            .build();
+
+        return httpClient.sendAsync(request, HttpResponse.BodyHandlers.ofString())
+            .thenApply(response -> handleResponse(response, responseType));
+    }
+
+    private <T> T handleResponse(HttpResponse<String> response, Class<T> responseType) {
+        if (response.statusCode() >= 400) {
+            ErrorResponse error = gson.fromJson(response.body(), ErrorResponse.class);
+            throw new WalletException(
+                error != null ? error.getMessage() : "Unknown error",
+                response.statusCode(),
+                error != null ? error.getCode() : null
+            );
+        }
+        return gson.fromJson(response.body(), responseType);
+    }
+
+    // Request/Response DTOs
+    private record CreateWalletRequest(WalletType type, Network network) {}
+    private record ImportWalletRequest(String mnemonic, String passphrase, WalletType type, Network network) {}
+    private record SignTransactionRequest(Transaction transaction) {}
+    private record SignMessageRequest(String message, String format) {}
+    private record WalletResponse(Wallet wallet) { Wallet getWallet() { return wallet; } }
+    private record SignedTransactionResponse(SignedTransaction signedTransaction) { SignedTransaction getSignedTransaction() { return signedTransaction; } }
+    private record UTXOsResponse(UTXO[] utxos) { UTXO[] getUtxos() { return utxos; } }
+    private record ErrorResponse(String message, String code) { String getMessage() { return message; } String getCode() { return code; } }
+}

sdk/java/src/main/java/io/synor/wallet/Types.java

@@ -0,0 +1,240 @@
+package io.synor.wallet;
+
+import java.util.List;
+
+/** Network type. */
+public enum Network {
+    MAINNET("mainnet"),
+    TESTNET("testnet");
+
+    private final String value;
+    Network(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Wallet type. */
+public enum WalletType {
+    STANDARD("standard"),
+    MULTISIG("multisig"),
+    STEALTH("stealth"),
+    HARDWARE("hardware");
+
+    private final String value;
+    WalletType(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Transaction priority. */
+public enum Priority {
+    LOW("low"),
+    MEDIUM("medium"),
+    HIGH("high"),
+    URGENT("urgent");
+
+    private final String value;
+    Priority(String value) { this.value = value; }
+    public String getValue() { return value; }
+}
+
+/** Wallet configuration. */
+class WalletConfig {
+    private final String apiKey;
+    private final String endpoint;
+    private final Network network;
+    private final long timeoutSeconds;
+    private final boolean debug;
+
+    private WalletConfig(Builder builder) {
+        this.apiKey = builder.apiKey;
+        this.endpoint = builder.endpoint;
+        this.network = builder.network;
+        this.timeoutSeconds = builder.timeoutSeconds;
+        this.debug = builder.debug;
+    }
+
+    public String getApiKey() { return apiKey; }
+    public String getEndpoint() { return endpoint; }
+    public Network getNetwork() { return network; }
+    public long getTimeoutSeconds() { return timeoutSeconds; }
+    public boolean isDebug() { return debug; }
+
+    public static Builder builder() { return new Builder(); }
+
+    public static class Builder {
+        private String apiKey;
+        private String endpoint = "https://wallet.synor.cc/api/v1";
+        private Network network = Network.MAINNET;
+        private long timeoutSeconds = 30;
+        private boolean debug = false;
+
+        public Builder apiKey(String apiKey) { this.apiKey = apiKey; return this; }
+        public Builder endpoint(String endpoint) { this.endpoint = endpoint; return this; }
+        public Builder network(Network network) { this.network = network; return this; }
+        public Builder timeoutSeconds(long seconds) { this.timeoutSeconds = seconds; return this; }
+        public Builder debug(boolean debug) { this.debug = debug; return this; }
+        public WalletConfig build() { return new WalletConfig(this); }
+    }
+}
+
+/** Wallet instance. */
+class Wallet {
+    private String id;
+    private String address;
+    private String publicKey;
+    private WalletType type;
+    private long createdAt;
+
+    public String getId() { return id; }
+    public String getAddress() { return address; }
+    public String getPublicKey() { return publicKey; }
+    public WalletType getType() { return type; }
+    public long getCreatedAt() { return createdAt; }
+}
+
+/** Create wallet result. */
+class CreateWalletResult {
+    private Wallet wallet;
+    private String mnemonic;
+
+    public Wallet getWallet() { return wallet; }
+    public String getMnemonic() { return mnemonic; }
+}
+
+/** Transaction input. */
+class TransactionInput {
+    private String txid;
+    private int vout;
+    private String amount;
+    private String scriptSig;
+
+    public String getTxid() { return txid; }
+    public int getVout() { return vout; }
+    public String getAmount() { return amount; }
+    public String getScriptSig() { return scriptSig; }
+}
+
+/** Transaction output. */
+class TransactionOutput {
+    private String address;
+    private String amount;
+    private String scriptPubKey;
+
+    public String getAddress() { return address; }
+    public String getAmount() { return amount; }
+    public String getScriptPubKey() { return scriptPubKey; }
+}
+
+/** Transaction. */
+class Transaction {
+    private int version;
+    private List<TransactionInput> inputs;
+    private List<TransactionOutput> outputs;
+    private int lockTime;
+    private String fee;
+
+    public int getVersion() { return version; }
+    public List<TransactionInput> getInputs() { return inputs; }
+    public List<TransactionOutput> getOutputs() { return outputs; }
+    public int getLockTime() { return lockTime; }
+    public String getFee() { return fee; }
+}
+
+/** Signed transaction. */
+class SignedTransaction {
+    private String raw;
+    private String txid;
+    private int size;
+    private int weight;
+
+    public String getRaw() { return raw; }
+    public String getTxid() { return txid; }
+    public int getSize() { return size; }
+    public int getWeight() { return weight; }
+}
+
+/** Signed message. */
+class SignedMessage {
+    private String signature;
+    private String publicKey;
+    private String address;
+
+    public String getSignature() { return signature; }
+    public String getPublicKey() { return publicKey; }
+    public String getAddress() { return address; }
+}
+
+/** UTXO. */
+class UTXO {
+    private String txid;
+    private int vout;
+    private String amount;
+    private String address;
+    private int confirmations;
+    private String scriptPubKey;
+
+    public String getTxid() { return txid; }
+    public int getVout() { return vout; }
+    public String getAmount() { return amount; }
+    public String getAddress() { return address; }
+    public int getConfirmations() { return confirmations; }
+    public String getScriptPubKey() { return scriptPubKey; }
+}
+
+/** Balance. */
+class Balance {
+    private String confirmed;
+    private String unconfirmed;
+    private String total;
+
+    public String getConfirmed() { return confirmed; }
+    public String getUnconfirmed() { return unconfirmed; }
+    public String getTotal() { return total; }
+}
+
+/** Token balance. */
+class TokenBalance {
+    private String token;
+    private String symbol;
+    private int decimals;
+    private String balance;
+
+    public String getToken() { return token; }
+    public String getSymbol() { return symbol; }
+    public int getDecimals() { return decimals; }
+    public String getBalance() { return balance; }
+}
+
+/** Balance response. */
+class BalanceResponse {
+    private Balance nativeBalance;
+    private List<TokenBalance> tokens;
+
+    public Balance getNativeBalance() { return nativeBalance; }
+    public List<TokenBalance> getTokens() { return tokens; }
+}
+
+/** Fee estimate. */
+class FeeEstimate {
+    private Priority priority;
+    private String feeRate;
+    private int estimatedBlocks;
+
+    public Priority getPriority() { return priority; }
+    public String getFeeRate() { return feeRate; }
+    public int getEstimatedBlocks() { return estimatedBlocks; }
+}
+
+/** Wallet exception. */
+class WalletException extends RuntimeException {
+    private final int statusCode;
+    private final String code;
+
+    public WalletException(String message, int statusCode, String code) {
+        super(message);
+        this.statusCode = statusCode;
+        this.code = code;
+    }
+
+    public int getStatusCode() { return statusCode; }
+    public String getCode() { return code; }
+}

sdk/js/src/bridge/client.ts

@@ -0,0 +1,501 @@
+/**
+ * Synor Bridge SDK Client
+ *
+ * Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+ */
+
+import {
+  BridgeConfig,
+  BridgeError,
+  BridgeErrorCode,
+  Chain,
+  ChainId,
+  Asset,
+  WrappedAsset,
+  Transfer,
+  TransferFilter,
+  TransferStatus,
+  LockReceipt,
+  LockProof,
+  LockOptions,
+  BurnReceipt,
+  BurnProof,
+  BurnOptions,
+  MintOptions,
+  UnlockOptions,
+  FeeEstimate,
+  ExchangeRate,
+  SignedTransaction,
+  DEFAULT_BRIDGE_ENDPOINT,
+} from './types';
+
+/** Synor Bridge Client */
+export class SynorBridge {
+  private readonly config: Required<BridgeConfig>;
+  private closed = false;
+
+  constructor(config: BridgeConfig) {
+    this.config = {
+      apiKey: config.apiKey,
+      endpoint: config.endpoint || DEFAULT_BRIDGE_ENDPOINT,
+      timeout: config.timeout || 60000,
+      retries: config.retries || 3,
+      debug: config.debug || false,
+    };
+  }
+
+  // ==================== Chain Operations ====================
+
+  /** Get all supported chains */
+  async getSupportedChains(): Promise<Chain[]> {
+    const response = await this.request<{ chains: Chain[] }>('GET', '/chains');
+    return response.chains;
+  }
+
+  /** Get chain by ID */
+  async getChain(chainId: ChainId): Promise<Chain> {
+    return this.request<Chain>('GET', `/chains/${chainId}`);
+  }
+
+  /** Check if chain is supported */
+  async isChainSupported(chainId: ChainId): Promise<boolean> {
+    try {
+      const chain = await this.getChain(chainId);
+      return chain.supported;
+    } catch {
+      return false;
+    }
+  }
+
+  // ==================== Asset Operations ====================
+
+  /** Get supported assets for a chain */
+  async getSupportedAssets(chainId: ChainId): Promise<Asset[]> {
+    const response = await this.request<{ assets: Asset[] }>(
+      'GET',
+      `/chains/${chainId}/assets`
+    );
+    return response.assets;
+  }
+
+  /** Get asset by ID */
+  async getAsset(assetId: string): Promise<Asset> {
+    return this.request<Asset>('GET', `/assets/${assetId}`);
+  }
+
+  /** Get wrapped asset mapping */
+  async getWrappedAsset(
+    originalAssetId: string,
+    targetChain: ChainId
+  ): Promise<WrappedAsset> {
+    return this.request<WrappedAsset>(
+      'GET',
+      `/assets/${originalAssetId}/wrapped/${targetChain}`
+    );
+  }
+
+  /** Get all wrapped assets for a chain */
+  async getWrappedAssets(chainId: ChainId): Promise<WrappedAsset[]> {
+    const response = await this.request<{ assets: WrappedAsset[] }>(
+      'GET',
+      `/chains/${chainId}/wrapped`
+    );
+    return response.assets;
+  }
+
+  // ==================== Fee & Rate Operations ====================
+
+  /** Estimate bridge fee */
+  async estimateFee(
+    asset: string,
+    amount: string,
+    sourceChain: ChainId,
+    targetChain: ChainId
+  ): Promise<FeeEstimate> {
+    return this.request<FeeEstimate>('POST', '/fees/estimate', {
+      asset,
+      amount,
+      sourceChain,
+      targetChain,
+    });
+  }
+
+  /** Get exchange rate between assets */
+  async getExchangeRate(fromAsset: string, toAsset: string): Promise<ExchangeRate> {
+    return this.request<ExchangeRate>(
+      'GET',
+      `/rates/${encodeURIComponent(fromAsset)}/${encodeURIComponent(toAsset)}`
+    );
+  }
+
+  // ==================== Lock-Mint Flow ====================
+
+  /**
+   * Lock assets on source chain for cross-chain transfer
+   * Step 1 of lock-mint flow
+   */
+  async lock(
+    asset: string,
+    amount: string,
+    targetChain: ChainId,
+    options?: LockOptions
+  ): Promise<LockReceipt> {
+    return this.request<LockReceipt>('POST', '/transfers/lock', {
+      asset,
+      amount,
+      targetChain,
+      recipient: options?.recipient,
+      deadline: options?.deadline,
+      slippage: options?.slippage,
+    });
+  }
+
+  /**
+   * Get lock proof for minting
+   * Step 2 of lock-mint flow (wait for confirmations)
+   */
+  async getLockProof(lockReceiptId: string): Promise<LockProof> {
+    return this.request<LockProof>('GET', `/transfers/lock/${lockReceiptId}/proof`);
+  }
+
+  /**
+   * Wait for lock proof to be ready
+   * Polls until confirmations are sufficient
+   */
+  async waitForLockProof(
+    lockReceiptId: string,
+    pollInterval = 5000,
+    maxWait = 600000
+  ): Promise<LockProof> {
+    const startTime = Date.now();
+
+    while (Date.now() - startTime < maxWait) {
+      try {
+        const proof = await this.getLockProof(lockReceiptId);
+        return proof;
+      } catch (error) {
+        if (
+          error instanceof BridgeError &&
+          error.code === 'CONFIRMATIONS_PENDING'
+        ) {
+          await this.sleep(pollInterval);
+          continue;
+        }
+        throw error;
+      }
+    }
+
+    throw new BridgeError(
+      'Timeout waiting for lock proof',
+      'CONFIRMATIONS_PENDING'
+    );
+  }
+
+  /**
+   * Mint wrapped tokens on target chain
+   * Step 3 of lock-mint flow
+   */
+  async mint(
+    proof: LockProof,
+    targetAddress: string,
+    options?: MintOptions
+  ): Promise<SignedTransaction> {
+    return this.request<SignedTransaction>('POST', '/transfers/mint', {
+      proof,
+      targetAddress,
+      gasLimit: options?.gasLimit,
+      maxFeePerGas: options?.maxFeePerGas,
+      maxPriorityFeePerGas: options?.maxPriorityFeePerGas,
+    });
+  }
+
+  // ==================== Burn-Unlock Flow ====================
+
+  /**
+   * Burn wrapped tokens on current chain
+   * Step 1 of burn-unlock flow
+   */
+  async burn(
+    wrappedAsset: string,
+    amount: string,
+    options?: BurnOptions
+  ): Promise<BurnReceipt> {
+    return this.request<BurnReceipt>('POST', '/transfers/burn', {
+      wrappedAsset,
+      amount,
+      recipient: options?.recipient,
+      deadline: options?.deadline,
+    });
+  }
+
+  /**
+   * Get burn proof for unlocking
+   * Step 2 of burn-unlock flow (wait for confirmations)
+   */
+  async getBurnProof(burnReceiptId: string): Promise<BurnProof> {
+    return this.request<BurnProof>('GET', `/transfers/burn/${burnReceiptId}/proof`);
+  }
+
+  /**
+   * Wait for burn proof to be ready
+   * Polls until confirmations are sufficient
+   */
+  async waitForBurnProof(
+    burnReceiptId: string,
+    pollInterval = 5000,
+    maxWait = 600000
+  ): Promise<BurnProof> {
+    const startTime = Date.now();
+
+    while (Date.now() - startTime < maxWait) {
+      try {
+        const proof = await this.getBurnProof(burnReceiptId);
+        return proof;
+      } catch (error) {
+        if (
+          error instanceof BridgeError &&
+          error.code === 'CONFIRMATIONS_PENDING'
+        ) {
+          await this.sleep(pollInterval);
+          continue;
+        }
+        throw error;
+      }
+    }
+
+    throw new BridgeError(
+      'Timeout waiting for burn proof',
+      'CONFIRMATIONS_PENDING'
+    );
+  }
+
+  /**
+   * Unlock original tokens on source chain
+   * Step 3 of burn-unlock flow
+   */
+  async unlock(proof: BurnProof, options?: UnlockOptions): Promise<SignedTransaction> {
+    return this.request<SignedTransaction>('POST', '/transfers/unlock', {
+      proof,
+      gasLimit: options?.gasLimit,
+      gasPrice: options?.gasPrice,
+    });
+  }
+
+  // ==================== Transfer Management ====================
+
+  /** Get transfer by ID */
+  async getTransfer(transferId: string): Promise<Transfer> {
+    return this.request<Transfer>('GET', `/transfers/${transferId}`);
+  }
+
+  /** Get transfer status */
+  async getTransferStatus(transferId: string): Promise<TransferStatus> {
+    const transfer = await this.getTransfer(transferId);
+    return transfer.status;
+  }
+
+  /** List transfers with optional filters */
+  async listTransfers(filter?: TransferFilter): Promise<Transfer[]> {
+    const params = new URLSearchParams();
+    if (filter) {
+      if (filter.status) params.set('status', filter.status);
+      if (filter.sourceChain) params.set('sourceChain', filter.sourceChain);
+      if (filter.targetChain) params.set('targetChain', filter.targetChain);
+      if (filter.asset) params.set('asset', filter.asset);
+      if (filter.sender) params.set('sender', filter.sender);
+      if (filter.recipient) params.set('recipient', filter.recipient);
+      if (filter.fromDate) params.set('fromDate', filter.fromDate.toString());
+      if (filter.toDate) params.set('toDate', filter.toDate.toString());
+      if (filter.limit) params.set('limit', filter.limit.toString());
+      if (filter.offset) params.set('offset', filter.offset.toString());
+    }
+
+    const query = params.toString();
+    const path = query ? `/transfers?${query}` : '/transfers';
+
+    const response = await this.request<{ transfers: Transfer[] }>('GET', path);
+    return response.transfers;
+  }
+
+  /** Wait for transfer to complete */
+  async waitForTransfer(
+    transferId: string,
+    pollInterval = 10000,
+    maxWait = 1800000
+  ): Promise<Transfer> {
+    const startTime = Date.now();
+    const finalStatuses: TransferStatus[] = ['completed', 'failed', 'refunded'];
+
+    while (Date.now() - startTime < maxWait) {
+      const transfer = await this.getTransfer(transferId);
+
+      if (finalStatuses.includes(transfer.status)) {
+        return transfer;
+      }
+
+      await this.sleep(pollInterval);
+    }
+
+    throw new BridgeError('Timeout waiting for transfer completion');
+  }
+
+  // ==================== Convenience Methods ====================
+
+  /**
+   * Execute complete lock-mint transfer
+   * Combines lock, wait for proof, and mint into single operation
+   */
+  async bridgeTo(
+    asset: string,
+    amount: string,
+    targetChain: ChainId,
+    targetAddress: string,
+    options?: LockOptions & MintOptions
+  ): Promise<Transfer> {
+    // Lock on source chain
+    const lockReceipt = await this.lock(asset, amount, targetChain, options);
+
+    if (this.config.debug) {
+      console.log(`Locked: ${lockReceipt.id}, waiting for confirmations...`);
+    }
+
+    // Wait for proof
+    const proof = await this.waitForLockProof(lockReceipt.id);
+
+    if (this.config.debug) {
+      console.log(`Proof ready, minting on ${targetChain}...`);
+    }
+
+    // Mint on target chain
+    await this.mint(proof, targetAddress, options);
+
+    // Return final transfer status
+    return this.waitForTransfer(lockReceipt.id);
+  }
+
+  /**
+   * Execute complete burn-unlock transfer
+   * Combines burn, wait for proof, and unlock into single operation
+   */
+  async bridgeBack(
+    wrappedAsset: string,
+    amount: string,
+    options?: BurnOptions & UnlockOptions
+  ): Promise<Transfer> {
+    // Burn wrapped tokens
+    const burnReceipt = await this.burn(wrappedAsset, amount, options);
+
+    if (this.config.debug) {
+      console.log(`Burned: ${burnReceipt.id}, waiting for confirmations...`);
+    }
+
+    // Wait for proof
+    const proof = await this.waitForBurnProof(burnReceipt.id);
+
+    if (this.config.debug) {
+      console.log(`Proof ready, unlocking on ${burnReceipt.targetChain}...`);
+    }
+
+    // Unlock on original chain
+    await this.unlock(proof, options);
+
+    // Return final transfer status
+    return this.waitForTransfer(burnReceipt.id);
+  }
+
+  // ==================== Lifecycle ====================
+
+  /** Close the client */
+  close(): void {
+    this.closed = true;
+  }
+
+  /** Check if client is closed */
+  isClosed(): boolean {
+    return this.closed;
+  }
+
+  /** Health check */
+  async healthCheck(): Promise<boolean> {
+    try {
+      const response = await this.request<{ status: string }>('GET', '/health');
+      return response.status === 'healthy';
+    } catch {
+      return false;
+    }
+  }
+
+  // ==================== Private Methods ====================
+
+  private async request<T>(
+    method: string,
+    path: string,
+    body?: Record<string, unknown>
+  ): Promise<T> {
+    if (this.closed) {
+      throw new BridgeError('Client has been closed');
+    }
+
+    let lastError: Error | undefined;
+
+    for (let attempt = 0; attempt < this.config.retries; attempt++) {
+      try {
+        return await this.doRequest<T>(method, path, body);
+      } catch (error) {
+        if (this.config.debug) {
+          console.error(`Attempt ${attempt + 1} failed:`, error);
+        }
+        lastError = error as Error;
+
+        if (attempt < this.config.retries - 1) {
+          await this.sleep(Math.pow(2, attempt) * 1000);
+        }
+      }
+    }
+
+    throw lastError || new BridgeError('Unknown error after retries');
+  }
+
+  private async doRequest<T>(
+    method: string,
+    path: string,
+    body?: Record<string, unknown>
+  ): Promise<T> {
+    const url = `${this.config.endpoint}${path}`;
+
+    const headers: Record<string, string> = {
+      Authorization: `Bearer ${this.config.apiKey}`,
+      'Content-Type': 'application/json',
+      'X-SDK-Version': 'js/0.1.0',
+    };
+
+    const controller = new AbortController();
+    const timeoutId = setTimeout(() => controller.abort(), this.config.timeout);
+
+    try {
+      const response = await fetch(url, {
+        method,
+        headers,
+        body: body ? JSON.stringify(body) : undefined,
+        signal: controller.signal,
+      });
+
+      if (!response.ok) {
+        const errorBody = await response.json().catch(() => ({}));
+        const message =
+          errorBody.message || errorBody.error || `HTTP ${response.status}`;
+        const code = errorBody.code as BridgeErrorCode | undefined;
+
+        throw new BridgeError(message, code, response.status, errorBody);
+      }
+
+      return response.json();
+    } finally {
+      clearTimeout(timeoutId);
+    }
+  }
+
+  private sleep(ms: number): Promise<void> {
+    return new Promise((resolve) => setTimeout(resolve, ms));
+  }
+}

sdk/js/src/bridge/index.ts

@@ -0,0 +1,25 @@
+/**
+ * Synor Bridge SDK
+ *
+ * Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+ *
+ * @example
+ * ```typescript
+ * import { SynorBridge } from '@synor/bridge';
+ *
+ * const bridge = new SynorBridge({ apiKey: 'your-api-key' });
+ *
+ * // Bridge tokens from Synor to Ethereum
+ * const transfer = await bridge.bridgeTo(
+ *   'SYNR',
+ *   '1000000000000000000', // 1 SYNR in wei
+ *   'ethereum',
+ *   '0x...'
+ * );
+ *
+ * console.log(`Transfer ${transfer.id}: ${transfer.status}`);
+ * ```
+ */
+
+export * from './types';
+export * from './client';

sdk/js/src/bridge/types.ts

@@ -0,0 +1,279 @@
+/**
+ * Synor Bridge SDK Types
+ *
+ * Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+ */
+
+// ==================== Chain Types ====================
+
+/** Supported blockchain networks */
+export type ChainId =
+  | 'synor'
+  | 'ethereum'
+  | 'polygon'
+  | 'arbitrum'
+  | 'optimism'
+  | 'bsc'
+  | 'avalanche'
+  | 'solana'
+  | 'cosmos';
+
+/** Chain information */
+export interface Chain {
+  id: ChainId;
+  name: string;
+  chainId: number;
+  rpcUrl: string;
+  explorerUrl: string;
+  nativeCurrency: {
+    name: string;
+    symbol: string;
+    decimals: number;
+  };
+  confirmations: number;
+  estimatedBlockTime: number; // seconds
+  supported: boolean;
+}
+
+// ==================== Asset Types ====================
+
+/** Asset type */
+export type AssetType = 'native' | 'erc20' | 'erc721' | 'erc1155';
+
+/** Asset information */
+export interface Asset {
+  id: string;
+  symbol: string;
+  name: string;
+  type: AssetType;
+  chain: ChainId;
+  contractAddress?: string;
+  decimals: number;
+  logoUrl?: string;
+  verified: boolean;
+}
+
+/** Wrapped asset mapping */
+export interface WrappedAsset {
+  originalAsset: Asset;
+  wrappedAsset: Asset;
+  chain: ChainId;
+  bridgeContract: string;
+}
+
+// ==================== Transfer Types ====================
+
+/** Transfer status */
+export type TransferStatus =
+  | 'pending'
+  | 'locked'
+  | 'confirming'
+  | 'minting'
+  | 'completed'
+  | 'failed'
+  | 'refunded';
+
+/** Transfer direction */
+export type TransferDirection = 'lock_mint' | 'burn_unlock';
+
+/** Lock receipt from source chain */
+export interface LockReceipt {
+  id: string;
+  txHash: string;
+  sourceChain: ChainId;
+  targetChain: ChainId;
+  asset: Asset;
+  amount: string;
+  sender: string;
+  recipient: string;
+  lockTimestamp: number;
+  confirmations: number;
+  requiredConfirmations: number;
+}
+
+/** Proof for minting on target chain */
+export interface LockProof {
+  lockReceipt: LockReceipt;
+  merkleProof: string[];
+  blockHeader: string;
+  signatures: ValidatorSignature[];
+}
+
+/** Validator signature for proof */
+export interface ValidatorSignature {
+  validator: string;
+  signature: string;
+  timestamp: number;
+}
+
+/** Burn receipt for unlocking */
+export interface BurnReceipt {
+  id: string;
+  txHash: string;
+  sourceChain: ChainId;
+  targetChain: ChainId;
+  wrappedAsset: Asset;
+  originalAsset: Asset;
+  amount: string;
+  sender: string;
+  recipient: string;
+  burnTimestamp: number;
+  confirmations: number;
+  requiredConfirmations: number;
+}
+
+/** Proof for unlocking on original chain */
+export interface BurnProof {
+  burnReceipt: BurnReceipt;
+  merkleProof: string[];
+  blockHeader: string;
+  signatures: ValidatorSignature[];
+}
+
+/** Complete transfer record */
+export interface Transfer {
+  id: string;
+  direction: TransferDirection;
+  status: TransferStatus;
+  sourceChain: ChainId;
+  targetChain: ChainId;
+  asset: Asset;
+  amount: string;
+  sender: string;
+  recipient: string;
+  sourceTxHash?: string;
+  targetTxHash?: string;
+  fee: string;
+  feeAsset: Asset;
+  createdAt: number;
+  updatedAt: number;
+  completedAt?: number;
+  errorMessage?: string;
+}
+
+// ==================== Fee Types ====================
+
+/** Fee estimate for bridge transfer */
+export interface FeeEstimate {
+  bridgeFee: string;
+  gasFeeSource: string;
+  gasFeeTarget: string;
+  totalFee: string;
+  feeAsset: Asset;
+  estimatedTime: number; // seconds
+  exchangeRate?: string;
+}
+
+/** Exchange rate between assets */
+export interface ExchangeRate {
+  fromAsset: Asset;
+  toAsset: Asset;
+  rate: string;
+  inverseRate: string;
+  lastUpdated: number;
+  source: string;
+}
+
+// ==================== Transaction Types ====================
+
+/** Signed transaction result */
+export interface SignedTransaction {
+  txHash: string;
+  chain: ChainId;
+  from: string;
+  to: string;
+  value: string;
+  data: string;
+  gasLimit: string;
+  gasPrice?: string;
+  maxFeePerGas?: string;
+  maxPriorityFeePerGas?: string;
+  nonce: number;
+  signature: string;
+}
+
+// ==================== Filter Types ====================
+
+/** Filter for listing transfers */
+export interface TransferFilter {
+  status?: TransferStatus;
+  sourceChain?: ChainId;
+  targetChain?: ChainId;
+  asset?: string;
+  sender?: string;
+  recipient?: string;
+  fromDate?: number;
+  toDate?: number;
+  limit?: number;
+  offset?: number;
+}
+
+// ==================== Config Types ====================
+
+/** Bridge configuration */
+export interface BridgeConfig {
+  apiKey: string;
+  endpoint?: string;
+  timeout?: number;
+  retries?: number;
+  debug?: boolean;
+}
+
+/** Default bridge endpoint */
+export const DEFAULT_BRIDGE_ENDPOINT = 'https://bridge.synor.io/v1';
+
+// ==================== Options Types ====================
+
+/** Options for lock operation */
+export interface LockOptions {
+  recipient?: string; // Defaults to sender
+  deadline?: number; // Unix timestamp
+  slippage?: number; // Percentage (0-100)
+}
+
+/** Options for mint operation */
+export interface MintOptions {
+  gasLimit?: string;
+  maxFeePerGas?: string;
+  maxPriorityFeePerGas?: string;
+}
+
+/** Options for burn operation */
+export interface BurnOptions {
+  recipient?: string;
+  deadline?: number;
+}
+
+/** Options for unlock operation */
+export interface UnlockOptions {
+  gasLimit?: string;
+  gasPrice?: string;
+}
+
+// ==================== Error Types ====================
+
+/** Bridge-specific error codes */
+export type BridgeErrorCode =
+  | 'INSUFFICIENT_BALANCE'
+  | 'UNSUPPORTED_CHAIN'
+  | 'UNSUPPORTED_ASSET'
+  | 'TRANSFER_NOT_FOUND'
+  | 'PROOF_INVALID'
+  | 'PROOF_EXPIRED'
+  | 'CONFIRMATIONS_PENDING'
+  | 'BRIDGE_PAUSED'
+  | 'RATE_LIMITED'
+  | 'SLIPPAGE_EXCEEDED';
+
+/** Bridge error */
+export class BridgeError extends Error {
+  constructor(
+    message: string,
+    public code?: BridgeErrorCode,
+    public statusCode?: number,
+    public details?: Record<string, unknown>
+  ) {
+    super(message);
+    this.name = 'BridgeError';
+  }
+}

sdk/js/src/database/client.ts

@@ -0,0 +1,659 @@
+/**
+ * Synor Database SDK Client
+ * Multi-model database: Key-Value, Document, Vector, and Time Series
+ */
+
+import type {
+  DatabaseConfig,
+  KeyValueEntry,
+  SetOptions,
+  ListOptions,
+  ListResult,
+  Document,
+  CreateDocumentOptions,
+  UpdateDocumentOptions,
+  QueryOptions,
+  QueryResult,
+  AggregateStage,
+  VectorEntry,
+  UpsertVectorOptions,
+  SearchOptions,
+  SearchResult,
+  VectorCollectionConfig,
+  VectorCollectionStats,
+  DataPoint,
+  WritePointsOptions,
+  TimeRange,
+  TimeSeriesQueryOptions,
+  TimeSeriesResult,
+  SeriesInfo,
+  DatabaseStats,
+} from './types';
+import { DatabaseError } from './types';
+
+const DEFAULT_CONFIG = {
+  endpoint: 'https://database.synor.io/v1',
+  network: 'mainnet' as const,
+  timeout: 30000,
+  retries: 3,
+  debug: false,
+};
+
+/**
+ * Key-Value store interface
+ */
+class KeyValueStore {
+  constructor(private client: SynorDatabase) {}
+
+  /**
+   * Get a value by key
+   */
+  async get<T = unknown>(key: string): Promise<T | null> {
+    const response = await this.client.request<{ value: T | null }>(`/kv/${encodeURIComponent(key)}`);
+    return response.value;
+  }
+
+  /**
+   * Get a full entry with metadata
+   */
+  async getEntry<T = unknown>(key: string): Promise<KeyValueEntry<T> | null> {
+    return this.client.request<KeyValueEntry<T> | null>(`/kv/${encodeURIComponent(key)}/entry`);
+  }
+
+  /**
+   * Set a value
+   */
+  async set<T = unknown>(key: string, value: T, options?: SetOptions): Promise<void> {
+    await this.client.request(`/kv/${encodeURIComponent(key)}`, {
+      method: 'PUT',
+      body: { value, ...options },
+    });
+  }
+
+  /**
+   * Delete a key
+   */
+  async delete(key: string): Promise<boolean> {
+    const response = await this.client.request<{ deleted: boolean }>(`/kv/${encodeURIComponent(key)}`, {
+      method: 'DELETE',
+    });
+    return response.deleted;
+  }
+
+  /**
+   * Check if a key exists
+   */
+  async exists(key: string): Promise<boolean> {
+    const response = await this.client.request<{ exists: boolean }>(`/kv/${encodeURIComponent(key)}/exists`);
+    return response.exists;
+  }
+
+  /**
+   * List keys with optional prefix filtering
+   */
+  async list<T = unknown>(options?: ListOptions): Promise<ListResult<T>> {
+    const params = new URLSearchParams();
+    if (options?.prefix) params.set('prefix', options.prefix);
+    if (options?.cursor) params.set('cursor', options.cursor);
+    if (options?.limit) params.set('limit', options.limit.toString());
+
+    return this.client.request<ListResult<T>>(`/kv?${params}`);
+  }
+
+  /**
+   * Get multiple values at once
+   */
+  async mget<T = unknown>(keys: string[]): Promise<Map<string, T | null>> {
+    const response = await this.client.request<{ entries: { key: string; value: T | null }[] }>('/kv/mget', {
+      method: 'POST',
+      body: { keys },
+    });
+    return new Map(response.entries.map(e => [e.key, e.value]));
+  }
+
+  /**
+   * Set multiple values at once
+   */
+  async mset<T = unknown>(entries: { key: string; value: T }[]): Promise<void> {
+    await this.client.request('/kv/mset', {
+      method: 'POST',
+      body: { entries },
+    });
+  }
+
+  /**
+   * Increment a numeric value
+   */
+  async incr(key: string, by: number = 1): Promise<number> {
+    const response = await this.client.request<{ value: number }>(`/kv/${encodeURIComponent(key)}/incr`, {
+      method: 'POST',
+      body: { by },
+    });
+    return response.value;
+  }
+}
+
+/**
+ * Document store interface
+ */
+class DocumentStore {
+  constructor(private client: SynorDatabase) {}
+
+  /**
+   * Create a new document
+   */
+  async create<T extends Record<string, unknown>>(
+    collection: string,
+    data: T,
+    options?: CreateDocumentOptions
+  ): Promise<Document<T>> {
+    return this.client.request<Document<T>>(`/documents/${encodeURIComponent(collection)}`, {
+      method: 'POST',
+      body: { data, ...options },
+    });
+  }
+
+  /**
+   * Get a document by ID
+   */
+  async get<T extends Record<string, unknown>>(
+    collection: string,
+    id: string
+  ): Promise<Document<T> | null> {
+    return this.client.request<Document<T> | null>(
+      `/documents/${encodeURIComponent(collection)}/${encodeURIComponent(id)}`
+    );
+  }
+
+  /**
+   * Update a document
+   */
+  async update<T extends Record<string, unknown>>(
+    collection: string,
+    id: string,
+    update: Partial<T>,
+    options?: UpdateDocumentOptions
+  ): Promise<Document<T>> {
+    return this.client.request<Document<T>>(
+      `/documents/${encodeURIComponent(collection)}/${encodeURIComponent(id)}`,
+      {
+        method: 'PATCH',
+        body: { update, ...options },
+      }
+    );
+  }
+
+  /**
+   * Replace a document
+   */
+  async replace<T extends Record<string, unknown>>(
+    collection: string,
+    id: string,
+    data: T
+  ): Promise<Document<T>> {
+    return this.client.request<Document<T>>(
+      `/documents/${encodeURIComponent(collection)}/${encodeURIComponent(id)}`,
+      {
+        method: 'PUT',
+        body: { data },
+      }
+    );
+  }
+
+  /**
+   * Delete a document
+   */
+  async delete(collection: string, id: string): Promise<boolean> {
+    const response = await this.client.request<{ deleted: boolean }>(
+      `/documents/${encodeURIComponent(collection)}/${encodeURIComponent(id)}`,
+      { method: 'DELETE' }
+    );
+    return response.deleted;
+  }
+
+  /**
+   * Query documents
+   */
+  async query<T extends Record<string, unknown>>(
+    collection: string,
+    options?: QueryOptions
+  ): Promise<QueryResult<T>> {
+    return this.client.request<QueryResult<T>>(
+      `/documents/${encodeURIComponent(collection)}/query`,
+      {
+        method: 'POST',
+        body: options || {},
+      }
+    );
+  }
+
+  /**
+   * Count documents matching a filter
+   */
+  async count(collection: string, filter?: QueryOptions['filter']): Promise<number> {
+    const response = await this.client.request<{ count: number }>(
+      `/documents/${encodeURIComponent(collection)}/count`,
+      {
+        method: 'POST',
+        body: { filter },
+      }
+    );
+    return response.count;
+  }
+
+  /**
+   * Run an aggregation pipeline
+   */
+  async aggregate<T = unknown>(
+    collection: string,
+    pipeline: AggregateStage[]
+  ): Promise<T[]> {
+    const response = await this.client.request<{ results: T[] }>(
+      `/documents/${encodeURIComponent(collection)}/aggregate`,
+      {
+        method: 'POST',
+        body: { pipeline },
+      }
+    );
+    return response.results;
+  }
+
+  /**
+   * Create an index on a collection
+   */
+  async createIndex(
+    collection: string,
+    fields: string[],
+    options?: { unique?: boolean; sparse?: boolean }
+  ): Promise<{ name: string }> {
+    return this.client.request<{ name: string }>(
+      `/documents/${encodeURIComponent(collection)}/indexes`,
+      {
+        method: 'POST',
+        body: { fields, ...options },
+      }
+    );
+  }
+
+  /**
+   * List indexes on a collection
+   */
+  async listIndexes(collection: string): Promise<{ name: string; fields: string[]; unique: boolean }[]> {
+    const response = await this.client.request<{ indexes: { name: string; fields: string[]; unique: boolean }[] }>(
+      `/documents/${encodeURIComponent(collection)}/indexes`
+    );
+    return response.indexes;
+  }
+}
+
+/**
+ * Vector store interface
+ */
+class VectorStore {
+  constructor(private client: SynorDatabase) {}
+
+  /**
+   * Create a vector collection
+   */
+  async createCollection(config: VectorCollectionConfig): Promise<void> {
+    await this.client.request('/vectors/collections', {
+      method: 'POST',
+      body: config,
+    });
+  }
+
+  /**
+   * Delete a vector collection
+   */
+  async deleteCollection(name: string): Promise<void> {
+    await this.client.request(`/vectors/collections/${encodeURIComponent(name)}`, {
+      method: 'DELETE',
+    });
+  }
+
+  /**
+   * Get collection stats
+   */
+  async getCollectionStats(name: string): Promise<VectorCollectionStats> {
+    return this.client.request<VectorCollectionStats>(
+      `/vectors/collections/${encodeURIComponent(name)}/stats`
+    );
+  }
+
+  /**
+   * Upsert vectors
+   */
+  async upsert(
+    collection: string,
+    vectors: VectorEntry[],
+    options?: UpsertVectorOptions
+  ): Promise<{ upserted: number }> {
+    return this.client.request<{ upserted: number }>(
+      `/vectors/${encodeURIComponent(collection)}/upsert`,
+      {
+        method: 'POST',
+        body: { vectors, ...options },
+      }
+    );
+  }
+
+  /**
+   * Search for similar vectors
+   */
+  async search(
+    collection: string,
+    vector: number[],
+    options?: SearchOptions
+  ): Promise<SearchResult[]> {
+    const response = await this.client.request<{ results: SearchResult[] }>(
+      `/vectors/${encodeURIComponent(collection)}/search`,
+      {
+        method: 'POST',
+        body: { vector, ...options },
+      }
+    );
+    return response.results;
+  }
+
+  /**
+   * Search using text (requires embedding generation)
+   */
+  async searchText(
+    collection: string,
+    text: string,
+    options?: SearchOptions
+  ): Promise<SearchResult[]> {
+    const response = await this.client.request<{ results: SearchResult[] }>(
+      `/vectors/${encodeURIComponent(collection)}/search/text`,
+      {
+        method: 'POST',
+        body: { text, ...options },
+      }
+    );
+    return response.results;
+  }
+
+  /**
+   * Delete vectors by ID
+   */
+  async delete(
+    collection: string,
+    ids: string[],
+    namespace?: string
+  ): Promise<{ deleted: number }> {
+    return this.client.request<{ deleted: number }>(
+      `/vectors/${encodeURIComponent(collection)}/delete`,
+      {
+        method: 'POST',
+        body: { ids, namespace },
+      }
+    );
+  }
+
+  /**
+   * Fetch vectors by ID
+   */
+  async fetch(
+    collection: string,
+    ids: string[],
+    namespace?: string
+  ): Promise<VectorEntry[]> {
+    const response = await this.client.request<{ vectors: VectorEntry[] }>(
+      `/vectors/${encodeURIComponent(collection)}/fetch`,
+      {
+        method: 'POST',
+        body: { ids, namespace },
+      }
+    );
+    return response.vectors;
+  }
+}
+
+/**
+ * Time series store interface
+ */
+class TimeSeriesStore {
+  constructor(private client: SynorDatabase) {}
+
+  /**
+   * Write data points to a series
+   */
+  async write(
+    series: string,
+    points: DataPoint[],
+    options?: WritePointsOptions
+  ): Promise<{ written: number }> {
+    return this.client.request<{ written: number }>(
+      `/timeseries/${encodeURIComponent(series)}/write`,
+      {
+        method: 'POST',
+        body: { points, ...options },
+      }
+    );
+  }
+
+  /**
+   * Query a time series
+   */
+  async query(
+    series: string,
+    range: TimeRange,
+    options?: TimeSeriesQueryOptions
+  ): Promise<TimeSeriesResult> {
+    return this.client.request<TimeSeriesResult>(
+      `/timeseries/${encodeURIComponent(series)}/query`,
+      {
+        method: 'POST',
+        body: { range, ...options },
+      }
+    );
+  }
+
+  /**
+   * Query multiple series
+   */
+  async queryMulti(
+    series: string[],
+    range: TimeRange,
+    options?: TimeSeriesQueryOptions
+  ): Promise<TimeSeriesResult[]> {
+    const response = await this.client.request<{ results: TimeSeriesResult[] }>(
+      '/timeseries/query',
+      {
+        method: 'POST',
+        body: { series, range, ...options },
+      }
+    );
+    return response.results;
+  }
+
+  /**
+   * Delete data points in a range
+   */
+  async delete(
+    series: string,
+    range: TimeRange,
+    tags?: Record<string, string>
+  ): Promise<{ deleted: number }> {
+    return this.client.request<{ deleted: number }>(
+      `/timeseries/${encodeURIComponent(series)}/delete`,
+      {
+        method: 'POST',
+        body: { range, tags },
+      }
+    );
+  }
+
+  /**
+   * Get series information
+   */
+  async getSeriesInfo(series: string): Promise<SeriesInfo> {
+    return this.client.request<SeriesInfo>(`/timeseries/${encodeURIComponent(series)}/info`);
+  }
+
+  /**
+   * List all series
+   */
+  async listSeries(prefix?: string): Promise<SeriesInfo[]> {
+    const params = prefix ? `?prefix=${encodeURIComponent(prefix)}` : '';
+    const response = await this.client.request<{ series: SeriesInfo[] }>(`/timeseries${params}`);
+    return response.series;
+  }
+
+  /**
+   * Set retention policy for a series
+   */
+  async setRetention(series: string, retentionDays: number): Promise<void> {
+    await this.client.request(`/timeseries/${encodeURIComponent(series)}/retention`, {
+      method: 'PUT',
+      body: { retentionDays },
+    });
+  }
+}
+
+/**
+ * Synor Database SDK Client
+ *
+ * Multi-model database supporting Key-Value, Document, Vector, and Time Series data.
+ *
+ * @example
+ * ```typescript
+ * const db = new SynorDatabase({ apiKey: 'your-api-key' });
+ *
+ * // Key-Value operations
+ * await db.kv.set('user:1', { name: 'Alice' });
+ * const user = await db.kv.get('user:1');
+ *
+ * // Document operations
+ * const doc = await db.documents.create('users', { name: 'Bob', age: 30 });
+ * const results = await db.documents.query('users', { filter: { age: { $gt: 25 } } });
+ *
+ * // Vector operations
+ * await db.vectors.upsert('embeddings', [{ id: '1', vector: [0.1, 0.2, ...] }]);
+ * const similar = await db.vectors.search('embeddings', queryVector, { topK: 10 });
+ *
+ * // Time series operations
+ * await db.timeseries.write('metrics', [{ timestamp: Date.now(), value: 42.5 }]);
+ * const data = await db.timeseries.query('metrics', { start: '-1h', end: 'now' });
+ * ```
+ */
+export class SynorDatabase {
+  private config: Required<DatabaseConfig>;
+  private closed = false;
+
+  /** Key-Value store */
+  readonly kv: KeyValueStore;
+  /** Document store */
+  readonly documents: DocumentStore;
+  /** Vector store */
+  readonly vectors: VectorStore;
+  /** Time series store */
+  readonly timeseries: TimeSeriesStore;
+
+  constructor(config: DatabaseConfig) {
+    this.config = {
+      ...DEFAULT_CONFIG,
+      ...config,
+    };
+
+    if (!this.config.apiKey) {
+      throw new DatabaseError('API key is required');
+    }
+
+    this.kv = new KeyValueStore(this);
+    this.documents = new DocumentStore(this);
+    this.vectors = new VectorStore(this);
+    this.timeseries = new TimeSeriesStore(this);
+  }
+
+  /**
+   * Get database statistics
+   */
+  async getStats(): Promise<DatabaseStats> {
+    return this.request<DatabaseStats>('/stats');
+  }
+
+  /**
+   * Health check
+   */
+  async healthCheck(): Promise<boolean> {
+    try {
+      const response = await this.request<{ status: string }>('/health');
+      return response.status === 'healthy';
+    } catch {
+      return false;
+    }
+  }
+
+  /**
+   * Close the client
+   */
+  close(): void {
+    this.closed = true;
+  }
+
+  /**
+   * Check if the client is closed
+   */
+  isClosed(): boolean {
+    return this.closed;
+  }
+
+  /**
+   * Internal request method
+   */
+  async request<T>(
+    path: string,
+    options: { method?: string; body?: unknown } = {}
+  ): Promise<T> {
+    if (this.closed) {
+      throw new DatabaseError('Client has been closed');
+    }
+
+    const { method = 'GET', body } = options;
+    let lastError: Error | null = null;
+
+    for (let attempt = 0; attempt < this.config.retries; attempt++) {
+      try {
+        const controller = new AbortController();
+        const timeoutId = setTimeout(() => controller.abort(), this.config.timeout);
+
+        const response = await fetch(`${this.config.endpoint}${path}`, {
+          method,
+          headers: {
+            'Authorization': `Bearer ${this.config.apiKey}`,
+            'Content-Type': 'application/json',
+            'X-SDK-Version': 'js/0.1.0',
+          },
+          body: body ? JSON.stringify(body) : undefined,
+          signal: controller.signal,
+        });
+
+        clearTimeout(timeoutId);
+
+        if (!response.ok) {
+          const errorData = await response.json().catch(() => ({}));
+          throw new DatabaseError(
+            errorData.message || errorData.error || `HTTP ${response.status}`,
+            errorData.code,
+            response.status
+          );
+        }
+
+        return await response.json();
+      } catch (error) {
+        lastError = error instanceof Error ? error : new Error(String(error));
+
+        if (this.config.debug) {
+          console.error(`Attempt ${attempt + 1} failed:`, lastError.message);
+        }
+
+        if (attempt < this.config.retries - 1) {
+          await new Promise(resolve => setTimeout(resolve, (attempt + 1) * 1000));
+        }
+      }
+    }
+
+    throw lastError || new DatabaseError('Unknown error after retries');
+  }
+}

sdk/js/src/database/index.ts

@@ -0,0 +1,7 @@
+/**
+ * Synor Database SDK
+ * Multi-model database: Key-Value, Document, Vector, and Time Series
+ */
+
+export * from './types';
+export * from './client';

sdk/js/src/database/types.ts

@@ -0,0 +1,234 @@
+/**
+ * Synor Database SDK Types
+ * Multi-model database: Key-Value, Document, Vector, and Time Series
+ */
+
+// Network environments
+export type DatabaseNetwork = 'mainnet' | 'testnet' | 'devnet';
+
+// Database configuration
+export interface DatabaseConfig {
+  apiKey: string;
+  endpoint?: string;
+  network?: DatabaseNetwork;
+  timeout?: number;
+  retries?: number;
+  debug?: boolean;
+}
+
+// ==================== Key-Value Types ====================
+
+export interface KeyValueEntry<T = unknown> {
+  key: string;
+  value: T;
+  metadata?: Record<string, string>;
+  expiresAt?: number;
+  createdAt: number;
+  updatedAt: number;
+}
+
+export interface SetOptions {
+  ttl?: number; // Time-to-live in seconds
+  metadata?: Record<string, string>;
+  ifNotExists?: boolean;
+  ifExists?: boolean;
+}
+
+export interface ListOptions {
+  prefix?: string;
+  cursor?: string;
+  limit?: number;
+}
+
+export interface ListResult<T = unknown> {
+  entries: KeyValueEntry<T>[];
+  cursor?: string;
+  hasMore: boolean;
+}
+
+// ==================== Document Store Types ====================
+
+export interface Document<T = Record<string, unknown>> {
+  id: string;
+  data: T;
+  metadata?: Record<string, string>;
+  createdAt: number;
+  updatedAt: number;
+  version: number;
+}
+
+export interface CreateDocumentOptions {
+  id?: string; // Auto-generate if not provided
+  metadata?: Record<string, string>;
+}
+
+export interface UpdateDocumentOptions {
+  upsert?: boolean;
+  returnDocument?: 'before' | 'after';
+}
+
+export type QueryOperator =
+  | '$eq' | '$ne' | '$gt' | '$gte' | '$lt' | '$lte'
+  | '$in' | '$nin' | '$exists' | '$regex'
+  | '$and' | '$or' | '$not';
+
+export type QueryFilter = {
+  [field: string]: unknown | { [K in QueryOperator]?: unknown };
+};
+
+export type SortOrder = 'asc' | 'desc';
+
+export interface QueryOptions {
+  filter?: QueryFilter;
+  sort?: { [field: string]: SortOrder };
+  skip?: number;
+  limit?: number;
+  projection?: string[];
+}
+
+export interface QueryResult<T = Record<string, unknown>> {
+  documents: Document<T>[];
+  total: number;
+  hasMore: boolean;
+}
+
+export interface AggregateStage {
+  $match?: QueryFilter;
+  $group?: { _id: string; [field: string]: { $sum?: string; $avg?: string; $count?: boolean; $min?: string; $max?: string } };
+  $sort?: { [field: string]: SortOrder };
+  $limit?: number;
+  $skip?: number;
+  $project?: { [field: string]: boolean | string };
+}
+
+// ==================== Vector Store Types ====================
+
+export interface VectorEntry {
+  id: string;
+  vector: number[];
+  metadata?: Record<string, unknown>;
+  content?: string; // Optional text content for hybrid search
+}
+
+export interface UpsertVectorOptions {
+  namespace?: string;
+}
+
+export type DistanceMetric = 'cosine' | 'euclidean' | 'dotProduct';
+
+export interface SearchOptions {
+  namespace?: string;
+  topK?: number;
+  filter?: QueryFilter;
+  includeMetadata?: boolean;
+  includeVectors?: boolean;
+  minScore?: number;
+}
+
+export interface SearchResult {
+  id: string;
+  score: number;
+  vector?: number[];
+  metadata?: Record<string, unknown>;
+  content?: string;
+}
+
+export interface VectorCollectionConfig {
+  name: string;
+  dimension: number;
+  metric?: DistanceMetric;
+  indexType?: 'flat' | 'hnsw' | 'ivf';
+}
+
+export interface VectorCollectionStats {
+  name: string;
+  vectorCount: number;
+  dimension: number;
+  indexSize: number;
+}
+
+// ==================== Time Series Types ====================
+
+export interface DataPoint {
+  timestamp: number;
+  value: number;
+  tags?: Record<string, string>;
+}
+
+export interface WritePointsOptions {
+  precision?: 'ns' | 'us' | 'ms' | 's';
+}
+
+export type Aggregation =
+  | 'mean' | 'sum' | 'count' | 'min' | 'max'
+  | 'first' | 'last' | 'stddev' | 'variance';
+
+export interface TimeRange {
+  start: number | Date | string;
+  end: number | Date | string;
+}
+
+export interface TimeSeriesQueryOptions {
+  tags?: Record<string, string>;
+  aggregation?: Aggregation;
+  interval?: string; // e.g., '1m', '5m', '1h', '1d'
+  fill?: 'none' | 'null' | 'previous' | number;
+  limit?: number;
+}
+
+export interface TimeSeriesResult {
+  series: string;
+  points: DataPoint[];
+  statistics?: {
+    min: number;
+    max: number;
+    mean: number;
+    count: number;
+  };
+}
+
+export interface SeriesInfo {
+  name: string;
+  tags: string[];
+  retentionDays: number;
+  pointCount: number;
+}
+
+// ==================== Database Stats ====================
+
+export interface DatabaseStats {
+  kvEntries: number;
+  documentCount: number;
+  vectorCount: number;
+  timeseriesPoints: number;
+  storageUsed: number;
+  storageLimit: number;
+}
+
+// ==================== Error Types ====================
+
+export class DatabaseError extends Error {
+  code?: string;
+  statusCode?: number;
+
+  constructor(message: string, code?: string, statusCode?: number) {
+    super(message);
+    this.name = 'DatabaseError';
+    this.code = code;
+    this.statusCode = statusCode;
+  }
+}
+
+export class DocumentNotFoundError extends DatabaseError {
+  constructor(collection: string, id: string) {
+    super(`Document not found: ${collection}/${id}`, 'DOCUMENT_NOT_FOUND', 404);
+    this.name = 'DocumentNotFoundError';
+  }
+}
+
+export class KeyNotFoundError extends DatabaseError {
+  constructor(key: string) {
+    super(`Key not found: ${key}`, 'KEY_NOT_FOUND', 404);
+    this.name = 'KeyNotFoundError';
+  }
+}

sdk/js/src/hosting/client.ts

@@ -0,0 +1,396 @@
+/**
+ * Synor Hosting SDK Client
+ * Decentralized web hosting with domain management, DNS, and deployments.
+ */
+
+import type {
+  HostingConfig,
+  Domain,
+  DomainRecord,
+  RegisterDomainOptions,
+  DomainAvailability,
+  DnsRecord,
+  DnsZone,
+  Deployment,
+  DeployOptions,
+  DeploymentStats,
+  Certificate,
+  ProvisionSslOptions,
+  SiteConfig,
+  AnalyticsData,
+  AnalyticsOptions,
+} from './types';
+import { HostingError } from './types';
+
+const DEFAULT_CONFIG = {
+  endpoint: 'https://hosting.synor.io/v1',
+  network: 'mainnet' as const,
+  timeout: 60000,
+  retries: 3,
+  debug: false,
+};
+
+/**
+ * Synor Hosting SDK Client
+ *
+ * Provides domain registration, DNS management, site deployment, and SSL provisioning.
+ *
+ * @example
+ * ```typescript
+ * const hosting = new SynorHosting({ apiKey: 'your-api-key' });
+ *
+ * // Register a domain
+ * const domain = await hosting.registerDomain('mysite.synor');
+ *
+ * // Deploy a site from IPFS CID
+ * const deployment = await hosting.deploy('Qm...', { domain: 'mysite.synor' });
+ *
+ * // Provision SSL
+ * const cert = await hosting.provisionSsl('mysite.synor');
+ * ```
+ */
+export class SynorHosting {
+  private config: Required<HostingConfig>;
+  private closed = false;
+
+  constructor(config: HostingConfig) {
+    this.config = {
+      ...DEFAULT_CONFIG,
+      ...config,
+    };
+
+    if (!this.config.apiKey) {
+      throw new HostingError('API key is required');
+    }
+  }
+
+  // ==================== Domain Operations ====================
+
+  /**
+   * Check domain availability
+   */
+  async checkAvailability(name: string): Promise<DomainAvailability> {
+    return this.request<DomainAvailability>(`/domains/check/${encodeURIComponent(name)}`);
+  }
+
+  /**
+   * Register a new domain
+   */
+  async registerDomain(name: string, options?: RegisterDomainOptions): Promise<Domain> {
+    return this.request<Domain>('/domains', {
+      method: 'POST',
+      body: { name, ...options },
+    });
+  }
+
+  /**
+   * Get domain information
+   */
+  async getDomain(name: string): Promise<Domain> {
+    return this.request<Domain>(`/domains/${encodeURIComponent(name)}`);
+  }
+
+  /**
+   * List all domains
+   */
+  async listDomains(): Promise<Domain[]> {
+    const response = await this.request<{ domains: Domain[] }>('/domains');
+    return response.domains;
+  }
+
+  /**
+   * Update domain record (for IPFS/IPNS resolution)
+   */
+  async updateDomainRecord(name: string, record: DomainRecord): Promise<Domain> {
+    return this.request<Domain>(`/domains/${encodeURIComponent(name)}/record`, {
+      method: 'PUT',
+      body: record,
+    });
+  }
+
+  /**
+   * Resolve a domain to its record
+   */
+  async resolveDomain(name: string): Promise<DomainRecord> {
+    return this.request<DomainRecord>(`/domains/${encodeURIComponent(name)}/resolve`);
+  }
+
+  /**
+   * Renew a domain
+   */
+  async renewDomain(name: string, years: number = 1): Promise<Domain> {
+    return this.request<Domain>(`/domains/${encodeURIComponent(name)}/renew`, {
+      method: 'POST',
+      body: { years },
+    });
+  }
+
+  /**
+   * Transfer domain ownership
+   */
+  async transferDomain(name: string, newOwner: string): Promise<Domain> {
+    return this.request<Domain>(`/domains/${encodeURIComponent(name)}/transfer`, {
+      method: 'POST',
+      body: { new_owner: newOwner },
+    });
+  }
+
+  // ==================== DNS Operations ====================
+
+  /**
+   * Get DNS zone for a domain
+   */
+  async getDnsZone(domain: string): Promise<DnsZone> {
+    return this.request<DnsZone>(`/dns/${encodeURIComponent(domain)}`);
+  }
+
+  /**
+   * Set DNS records for a domain
+   */
+  async setDnsRecords(domain: string, records: DnsRecord[]): Promise<DnsZone> {
+    return this.request<DnsZone>(`/dns/${encodeURIComponent(domain)}`, {
+      method: 'PUT',
+      body: { records },
+    });
+  }
+
+  /**
+   * Add a DNS record
+   */
+  async addDnsRecord(domain: string, record: DnsRecord): Promise<DnsZone> {
+    return this.request<DnsZone>(`/dns/${encodeURIComponent(domain)}/records`, {
+      method: 'POST',
+      body: record,
+    });
+  }
+
+  /**
+   * Delete a DNS record
+   */
+  async deleteDnsRecord(domain: string, recordType: string, name: string): Promise<DnsZone> {
+    return this.request<DnsZone>(
+      `/dns/${encodeURIComponent(domain)}/records/${recordType}/${encodeURIComponent(name)}`,
+      { method: 'DELETE' }
+    );
+  }
+
+  // ==================== Deployment Operations ====================
+
+  /**
+   * Deploy a site from CID
+   */
+  async deploy(cid: string, options?: DeployOptions): Promise<Deployment> {
+    return this.request<Deployment>('/deployments', {
+      method: 'POST',
+      body: { cid, ...options },
+    });
+  }
+
+  /**
+   * Get deployment by ID
+   */
+  async getDeployment(id: string): Promise<Deployment> {
+    return this.request<Deployment>(`/deployments/${encodeURIComponent(id)}`);
+  }
+
+  /**
+   * List deployments
+   */
+  async listDeployments(domain?: string): Promise<Deployment[]> {
+    const query = domain ? `?domain=${encodeURIComponent(domain)}` : '';
+    const response = await this.request<{ deployments: Deployment[] }>(`/deployments${query}`);
+    return response.deployments;
+  }
+
+  /**
+   * Rollback to a previous deployment
+   */
+  async rollback(domain: string, deploymentId: string): Promise<Deployment> {
+    return this.request<Deployment>(`/deployments/${encodeURIComponent(deploymentId)}/rollback`, {
+      method: 'POST',
+      body: { domain },
+    });
+  }
+
+  /**
+   * Delete a deployment
+   */
+  async deleteDeployment(id: string): Promise<void> {
+    await this.request(`/deployments/${encodeURIComponent(id)}`, { method: 'DELETE' });
+  }
+
+  /**
+   * Get deployment stats
+   */
+  async getDeploymentStats(id: string, period: string = '24h'): Promise<DeploymentStats> {
+    return this.request<DeploymentStats>(
+      `/deployments/${encodeURIComponent(id)}/stats?period=${period}`
+    );
+  }
+
+  // ==================== SSL Operations ====================
+
+  /**
+   * Provision SSL certificate
+   */
+  async provisionSsl(domain: string, options?: ProvisionSslOptions): Promise<Certificate> {
+    return this.request<Certificate>(`/ssl/${encodeURIComponent(domain)}`, {
+      method: 'POST',
+      body: options || {},
+    });
+  }
+
+  /**
+   * Get certificate status
+   */
+  async getCertificate(domain: string): Promise<Certificate> {
+    return this.request<Certificate>(`/ssl/${encodeURIComponent(domain)}`);
+  }
+
+  /**
+   * Renew SSL certificate
+   */
+  async renewCertificate(domain: string): Promise<Certificate> {
+    return this.request<Certificate>(`/ssl/${encodeURIComponent(domain)}/renew`, {
+      method: 'POST',
+    });
+  }
+
+  /**
+   * Delete/revoke SSL certificate
+   */
+  async deleteCertificate(domain: string): Promise<void> {
+    await this.request(`/ssl/${encodeURIComponent(domain)}`, { method: 'DELETE' });
+  }
+
+  // ==================== Site Configuration ====================
+
+  /**
+   * Get site configuration
+   */
+  async getSiteConfig(domain: string): Promise<SiteConfig> {
+    return this.request<SiteConfig>(`/sites/${encodeURIComponent(domain)}/config`);
+  }
+
+  /**
+   * Update site configuration
+   */
+  async updateSiteConfig(domain: string, config: Partial<SiteConfig>): Promise<SiteConfig> {
+    return this.request<SiteConfig>(`/sites/${encodeURIComponent(domain)}/config`, {
+      method: 'PATCH',
+      body: config,
+    });
+  }
+
+  /**
+   * Purge CDN cache
+   */
+  async purgeCache(domain: string, paths?: string[]): Promise<{ purged: number }> {
+    return this.request<{ purged: number }>(`/sites/${encodeURIComponent(domain)}/cache`, {
+      method: 'DELETE',
+      body: paths ? { paths } : undefined,
+    });
+  }
+
+  // ==================== Analytics ====================
+
+  /**
+   * Get site analytics
+   */
+  async getAnalytics(domain: string, options?: AnalyticsOptions): Promise<AnalyticsData> {
+    const params = new URLSearchParams();
+    if (options?.period) params.set('period', options.period);
+    if (options?.startDate) params.set('start', options.startDate);
+    if (options?.endDate) params.set('end', options.endDate);
+
+    const query = params.toString() ? `?${params}` : '';
+    return this.request<AnalyticsData>(`/sites/${encodeURIComponent(domain)}/analytics${query}`);
+  }
+
+  // ==================== Lifecycle ====================
+
+  /**
+   * Close the client
+   */
+  close(): void {
+    this.closed = true;
+  }
+
+  /**
+   * Check if the client is closed
+   */
+  isClosed(): boolean {
+    return this.closed;
+  }
+
+  /**
+   * Health check
+   */
+  async healthCheck(): Promise<boolean> {
+    try {
+      const response = await this.request<{ status: string }>('/health');
+      return response.status === 'healthy';
+    } catch {
+      return false;
+    }
+  }
+
+  /**
+   * Internal request method
+   */
+  private async request<T>(
+    path: string,
+    options: { method?: string; body?: unknown } = {}
+  ): Promise<T> {
+    if (this.closed) {
+      throw new HostingError('Client has been closed');
+    }
+
+    const { method = 'GET', body } = options;
+    let lastError: Error | null = null;
+
+    for (let attempt = 0; attempt < this.config.retries; attempt++) {
+      try {
+        const controller = new AbortController();
+        const timeoutId = setTimeout(() => controller.abort(), this.config.timeout);
+
+        const response = await fetch(`${this.config.endpoint}${path}`, {
+          method,
+          headers: {
+            'Authorization': `Bearer ${this.config.apiKey}`,
+            'Content-Type': 'application/json',
+            'X-SDK-Version': 'js/0.1.0',
+          },
+          body: body ? JSON.stringify(body) : undefined,
+          signal: controller.signal,
+        });
+
+        clearTimeout(timeoutId);
+
+        if (!response.ok) {
+          const errorData = await response.json().catch(() => ({}));
+          throw new HostingError(
+            errorData.message || errorData.error || `HTTP ${response.status}`,
+            errorData.code,
+            response.status
+          );
+        }
+
+        const text = await response.text();
+        return text ? JSON.parse(text) : ({} as T);
+      } catch (error) {
+        lastError = error instanceof Error ? error : new Error(String(error));
+
+        if (this.config.debug) {
+          console.error(`Attempt ${attempt + 1} failed:`, lastError.message);
+        }
+
+        if (attempt < this.config.retries - 1) {
+          await new Promise(resolve => setTimeout(resolve, (attempt + 1) * 1000));
+        }
+      }
+    }
+
+    throw lastError || new HostingError('Unknown error after retries');
+  }
+}

sdk/js/src/hosting/index.ts

@@ -0,0 +1,7 @@
+/**
+ * Synor Hosting SDK
+ * Decentralized web hosting with domain management, DNS, and deployments.
+ */
+
+export * from './types';
+export * from './client';

sdk/js/src/hosting/types.ts

@@ -0,0 +1,193 @@
+/**
+ * Synor Hosting SDK Types
+ * Decentralized web hosting with domain management, DNS, and deployments.
+ */
+
+// Network environments
+export type HostingNetwork = 'mainnet' | 'testnet' | 'devnet';
+
+// Hosting configuration
+export interface HostingConfig {
+  apiKey: string;
+  endpoint?: string;
+  network?: HostingNetwork;
+  timeout?: number;
+  retries?: number;
+  debug?: boolean;
+}
+
+// ==================== Domain Types ====================
+
+export type DomainStatus = 'pending' | 'active' | 'expired' | 'suspended';
+
+export interface Domain {
+  name: string;
+  status: DomainStatus;
+  owner: string;
+  registeredAt: number;
+  expiresAt: number;
+  autoRenew: boolean;
+  records?: DomainRecord;
+}
+
+export interface DomainRecord {
+  cid?: string;
+  ipv4?: string[];
+  ipv6?: string[];
+  cname?: string;
+  txt?: string[];
+  metadata?: Record<string, string>;
+}
+
+export interface RegisterDomainOptions {
+  years?: number;
+  autoRenew?: boolean;
+  records?: DomainRecord;
+}
+
+export interface DomainAvailability {
+  name: string;
+  available: boolean;
+  price?: number;
+  premium?: boolean;
+}
+
+// ==================== DNS Types ====================
+
+export type DnsRecordType = 'A' | 'AAAA' | 'CNAME' | 'TXT' | 'MX' | 'NS' | 'SRV' | 'CAA';
+
+export interface DnsRecord {
+  type: DnsRecordType;
+  name: string;
+  value: string;
+  ttl?: number;
+  priority?: number; // For MX and SRV
+}
+
+export interface DnsZone {
+  domain: string;
+  records: DnsRecord[];
+  updatedAt: number;
+}
+
+// ==================== Deployment Types ====================
+
+export type DeploymentStatus = 'pending' | 'building' | 'deploying' | 'active' | 'failed' | 'inactive';
+
+export interface Deployment {
+  id: string;
+  domain: string;
+  cid: string;
+  status: DeploymentStatus;
+  url: string;
+  createdAt: number;
+  updatedAt: number;
+  buildLogs?: string;
+  errorMessage?: string;
+}
+
+export interface DeployOptions {
+  domain?: string;
+  subdomain?: string;
+  headers?: Record<string, string>;
+  redirects?: RedirectRule[];
+  spa?: boolean; // Single-page app mode
+  cleanUrls?: boolean;
+  trailingSlash?: boolean;
+}
+
+export interface RedirectRule {
+  source: string;
+  destination: string;
+  statusCode?: number;
+  permanent?: boolean;
+}
+
+export interface DeploymentStats {
+  requests: number;
+  bandwidth: number;
+  uniqueVisitors: number;
+  period: string;
+}
+
+// ==================== SSL Types ====================
+
+export type CertificateStatus = 'pending' | 'issued' | 'expired' | 'revoked';
+
+export interface Certificate {
+  domain: string;
+  status: CertificateStatus;
+  issuedAt?: number;
+  expiresAt?: number;
+  autoRenew: boolean;
+  issuer: string;
+  fingerprint?: string;
+}
+
+export interface ProvisionSslOptions {
+  includeWww?: boolean;
+  autoRenew?: boolean;
+}
+
+// ==================== Site Configuration ====================
+
+export interface SiteConfig {
+  domain: string;
+  cid?: string;
+  headers?: Record<string, string>;
+  redirects?: RedirectRule[];
+  errorPages?: {
+    '404'?: string;
+    '500'?: string;
+  };
+  spa?: boolean;
+  cleanUrls?: boolean;
+  trailingSlash?: boolean;
+}
+
+// ==================== Analytics ====================
+
+export interface AnalyticsData {
+  domain: string;
+  period: string;
+  pageViews: number;
+  uniqueVisitors: number;
+  bandwidth: number;
+  topPages: { path: string; views: number }[];
+  topReferrers: { referrer: string; count: number }[];
+  topCountries: { country: string; count: number }[];
+}
+
+export interface AnalyticsOptions {
+  period?: '24h' | '7d' | '30d' | '90d';
+  startDate?: string;
+  endDate?: string;
+}
+
+// ==================== Error Types ====================
+
+export class HostingError extends Error {
+  code?: string;
+  statusCode?: number;
+
+  constructor(message: string, code?: string, statusCode?: number) {
+    super(message);
+    this.name = 'HostingError';
+    this.code = code;
+    this.statusCode = statusCode;
+  }
+}
+
+export class DomainNotFoundError extends HostingError {
+  constructor(domain: string) {
+    super(`Domain not found: ${domain}`, 'DOMAIN_NOT_FOUND', 404);
+    this.name = 'DomainNotFoundError';
+  }
+}
+
+export class DomainUnavailableError extends HostingError {
+  constructor(domain: string) {
+    super(`Domain is not available: ${domain}`, 'DOMAIN_UNAVAILABLE', 409);
+    this.name = 'DomainUnavailableError';
+  }
+}

sdk/kotlin/build.gradle.kts

@@ -21,11 +21,13 @@ dependencies {
     implementation("io.ktor:ktor-client-core:2.3.7")
     implementation("io.ktor:ktor-client-cio:2.3.7")
     implementation("io.ktor:ktor-client-content-negotiation:2.3.7")
+    implementation("io.ktor:ktor-client-websockets:2.3.7")
     implementation("io.ktor:ktor-serialization-kotlinx-json:2.3.7")
 
     // Testing
     testImplementation(kotlin("test"))
     testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.7.3")
+    testImplementation("io.ktor:ktor-client-mock:2.3.7")
     testImplementation("io.mockk:mockk:1.13.8")
 }
 
@@ -42,9 +44,16 @@ publishing {
         create<MavenPublication>("maven") {
             from(components["java"])
             pom {
-                name.set("Synor Compute SDK")
-                description.set("Kotlin SDK for Synor Compute - Distributed Heterogeneous Computing")
-                url.set("https://github.com/synor/synor-compute-kotlin")
+                name.set("Synor SDK")
+                description.set("Kotlin SDK for Synor - Compute, Wallet, RPC, and Storage")
+                url.set("https://synor.cc")
+
+                licenses {
+                    license {
+                        name.set("MIT License")
+                        url.set("https://opensource.org/licenses/MIT")
+                    }
+                }
             }
         }
     }

sdk/kotlin/settings.gradle.kts

@@ -0,0 +1 @@
+rootProject.name = "synor-sdk"

sdk/kotlin/src/main/kotlin/io/synor/rpc/SynorRpc.kt

@@ -0,0 +1,355 @@
+package io.synor.rpc
+
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.engine.cio.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.plugins.websocket.*
+import io.ktor.client.request.*
+import io.ktor.client.statement.*
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.websocket.*
+import kotlinx.coroutines.*
+import kotlinx.coroutines.channels.Channel
+import kotlinx.coroutines.flow.*
+import kotlinx.serialization.json.Json
+import java.io.Closeable
+import java.util.UUID
+import java.util.concurrent.ConcurrentHashMap
+
+/**
+ * Synor RPC SDK client for Kotlin.
+ *
+ * Provides blockchain queries, transaction submission, and real-time
+ * subscriptions via WebSocket.
+ *
+ * Example:
+ * ```kotlin
+ * val rpc = SynorRpc(RpcConfig.builder("your-api-key").build())
+ *
+ * // Get latest block
+ * val block = rpc.getLatestBlock()
+ * println("Latest block: ${block.height}")
+ *
+ * // Subscribe to new blocks
+ * val scope = CoroutineScope(Dispatchers.Default)
+ * val subscription = rpc.subscribeBlocks(scope) { block ->
+ *     println("New block: ${block.height}")
+ * }
+ *
+ * // Later: cancel subscription
+ * subscription.cancel()
+ * rpc.close()
+ * ```
+ */
+class SynorRpc(private val config: RpcConfig) : Closeable {
+
+    private val json = Json {
+        ignoreUnknownKeys = true
+        isLenient = true
+        encodeDefaults = true
+    }
+
+    private val client = HttpClient(CIO) {
+        install(ContentNegotiation) {
+            json(json)
+        }
+
+        install(WebSockets)
+
+        install(HttpTimeout) {
+            requestTimeoutMillis = config.timeout
+            connectTimeoutMillis = config.timeout
+        }
+
+        defaultRequest {
+            header("Authorization", "Bearer ${config.apiKey}")
+            header("Content-Type", "application/json")
+        }
+    }
+
+    private var wsSession: WebSocketSession? = null
+    private val subscriptions = ConcurrentHashMap<String, (String) -> Unit>()
+    private var wsJob: Job? = null
+
+    // Block operations
+
+    /**
+     * Get the latest block.
+     */
+    suspend fun getLatestBlock(): Block {
+        return get("/blocks/latest")
+    }
+
+    /**
+     * Get a block by hash or height.
+     */
+    suspend fun getBlock(hashOrHeight: String): Block {
+        return get("/blocks/$hashOrHeight")
+    }
+
+    /**
+     * Get a block header by hash or height.
+     */
+    suspend fun getBlockHeader(hashOrHeight: String): BlockHeader {
+        return get("/blocks/$hashOrHeight/header")
+    }
+
+    /**
+     * Get blocks in a range.
+     */
+    suspend fun getBlocks(startHeight: Long, endHeight: Long): List<Block> {
+        return get("/blocks?start=$startHeight&end=$endHeight")
+    }
+
+    // Transaction operations
+
+    /**
+     * Get a transaction by ID.
+     */
+    suspend fun getTransaction(txid: String): Transaction {
+        return get("/transactions/$txid")
+    }
+
+    /**
+     * Get raw transaction hex.
+     */
+    suspend fun getRawTransaction(txid: String): String {
+        val response: Map<String, String> = get("/transactions/$txid/raw")
+        return response["hex"] ?: throw RpcException("Missing hex in response")
+    }
+
+    /**
+     * Send a raw transaction.
+     */
+    suspend fun sendRawTransaction(hex: String): SubmitResult {
+        return post("/transactions/send", mapOf("hex" to hex))
+    }
+
+    /**
+     * Decode a raw transaction without broadcasting.
+     */
+    suspend fun decodeRawTransaction(hex: String): Transaction {
+        return post("/transactions/decode", mapOf("hex" to hex))
+    }
+
+    /**
+     * Get transactions for an address.
+     */
+    suspend fun getAddressTransactions(
+        address: String,
+        limit: Int = 50,
+        offset: Int = 0
+    ): List<Transaction> {
+        return get("/addresses/$address/transactions?limit=$limit&offset=$offset")
+    }
+
+    // Fee estimation
+
+    /**
+     * Estimate fee for a given priority.
+     */
+    suspend fun estimateFee(priority: Priority = Priority.MEDIUM): FeeEstimate {
+        return get("/fees/estimate?priority=${priority.name.lowercase()}")
+    }
+
+    /**
+     * Get all fee estimates.
+     */
+    suspend fun getAllFeeEstimates(): Map<Priority, FeeEstimate> {
+        val estimates: List<FeeEstimate> = get("/fees/estimates")
+        return estimates.associateBy { it.priority }
+    }
+
+    // Chain information
+
+    /**
+     * Get chain information.
+     */
+    suspend fun getChainInfo(): ChainInfo {
+        return get("/chain/info")
+    }
+
+    /**
+     * Get mempool information.
+     */
+    suspend fun getMempoolInfo(): MempoolInfo {
+        return get("/mempool/info")
+    }
+
+    /**
+     * Get mempool transactions.
+     */
+    suspend fun getMempoolTransactions(limit: Int = 100): List<String> {
+        return get("/mempool/transactions?limit=$limit")
+    }
+
+    // WebSocket subscriptions
+
+    /**
+     * Subscribe to new blocks.
+     */
+    suspend fun subscribeBlocks(
+        scope: CoroutineScope,
+        callback: (Block) -> Unit
+    ): Subscription {
+        return subscribe(scope, "blocks", null) { data ->
+            val block = json.decodeFromString<Block>(data)
+            callback(block)
+        }
+    }
+
+    /**
+     * Subscribe to transactions for a specific address.
+     */
+    suspend fun subscribeAddress(
+        scope: CoroutineScope,
+        address: String,
+        callback: (Transaction) -> Unit
+    ): Subscription {
+        return subscribe(scope, "address", address) { data ->
+            val tx = json.decodeFromString<Transaction>(data)
+            callback(tx)
+        }
+    }
+
+    /**
+     * Subscribe to mempool transactions.
+     */
+    suspend fun subscribeMempool(
+        scope: CoroutineScope,
+        callback: (Transaction) -> Unit
+    ): Subscription {
+        return subscribe(scope, "mempool", null) { data ->
+            val tx = json.decodeFromString<Transaction>(data)
+            callback(tx)
+        }
+    }
+
+    private suspend fun subscribe(
+        scope: CoroutineScope,
+        channel: String,
+        filter: String?,
+        callback: (String) -> Unit
+    ): Subscription {
+        ensureWebSocketConnection(scope)
+
+        val subscriptionId = UUID.randomUUID().toString()
+        subscriptions[subscriptionId] = callback
+
+        val message = WsMessage(
+            type = "subscribe",
+            channel = channel,
+            filter = filter
+        )
+        wsSession?.send(Frame.Text(json.encodeToString(WsMessage.serializer(), message)))
+
+        return Subscription(
+            id = subscriptionId,
+            channel = channel,
+            onCancel = {
+                subscriptions.remove(subscriptionId)
+                scope.launch {
+                    val unsubMsg = WsMessage(type = "unsubscribe", channel = channel)
+                    wsSession?.send(Frame.Text(json.encodeToString(WsMessage.serializer(), unsubMsg)))
+                }
+            }
+        )
+    }
+
+    private suspend fun ensureWebSocketConnection(scope: CoroutineScope) {
+        if (wsSession != null && wsSession?.isActive == true) return
+
+        wsSession = client.webSocketSession("${config.wsEndpoint}?token=${config.apiKey}")
+
+        wsJob = scope.launch {
+            try {
+                wsSession?.incoming?.consumeAsFlow()?.collect { frame ->
+                    when (frame) {
+                        is Frame.Text -> {
+                            val text = frame.readText()
+                            try {
+                                val message = json.decodeFromString<WsMessage>(text)
+                                if (message.type == "data" && message.data != null) {
+                                    subscriptions.values.forEach { it(message.data) }
+                                }
+                            } catch (e: Exception) {
+                                if (config.debug) {
+                                    println("Failed to parse WS message: ${e.message}")
+                                }
+                            }
+                        }
+                        else -> {}
+                    }
+                }
+            } catch (e: Exception) {
+                if (config.debug) {
+                    println("WebSocket error: ${e.message}")
+                }
+            }
+        }
+    }
+
+    private suspend inline fun <reified T> get(path: String): T {
+        return executeWithRetry {
+            val response = client.get("${config.endpoint}$path")
+            handleResponse(response)
+        }
+    }
+
+    private suspend inline fun <reified T, reified R> post(path: String, body: R): T {
+        return executeWithRetry {
+            val response = client.post("${config.endpoint}$path") {
+                setBody(body)
+            }
+            handleResponse(response)
+        }
+    }
+
+    private suspend inline fun <reified T> handleResponse(response: HttpResponse): T {
+        if (response.status.isSuccess()) {
+            return response.body()
+        }
+
+        val errorBody = try {
+            response.bodyAsText()
+        } catch (e: Exception) {
+            "Unknown error"
+        }
+
+        throw RpcException(
+            message = "RPC API error: $errorBody",
+            statusCode = response.status.value
+        )
+    }
+
+    private suspend inline fun <T> executeWithRetry(block: () -> T): T {
+        var lastException: Exception? = null
+
+        repeat(config.retries) { attempt ->
+            try {
+                return block()
+            } catch (e: Exception) {
+                lastException = e
+                if (config.debug) {
+                    println("Attempt ${attempt + 1} failed: ${e.message}")
+                }
+                if (attempt < config.retries - 1) {
+                    delay(1000L * (attempt + 1))
+                }
+            }
+        }
+
+        throw lastException ?: RpcException("Unknown error after ${config.retries} retries")
+    }
+
+    override fun close() {
+        wsJob?.cancel()
+        runBlocking {
+            wsSession?.close()
+        }
+        client.close()
+    }
+}

sdk/kotlin/src/main/kotlin/io/synor/rpc/Types.kt

@@ -0,0 +1,237 @@
+package io.synor.rpc
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * Network environment.
+ */
+@Serializable
+enum class Network {
+    @SerialName("mainnet") MAINNET,
+    @SerialName("testnet") TESTNET,
+    @SerialName("devnet") DEVNET
+}
+
+/**
+ * Transaction priority for fee estimation.
+ */
+@Serializable
+enum class Priority {
+    @SerialName("low") LOW,
+    @SerialName("medium") MEDIUM,
+    @SerialName("high") HIGH
+}
+
+/**
+ * Transaction status.
+ */
+@Serializable
+enum class TransactionStatus {
+    @SerialName("pending") PENDING,
+    @SerialName("confirmed") CONFIRMED,
+    @SerialName("failed") FAILED
+}
+
+/**
+ * Configuration for the RPC client.
+ */
+data class RpcConfig(
+    val apiKey: String,
+    val endpoint: String = "https://rpc.synor.io/v1",
+    val wsEndpoint: String = "wss://rpc.synor.io/v1/ws",
+    val network: Network = Network.MAINNET,
+    val timeout: Long = 30_000L,
+    val retries: Int = 3,
+    val debug: Boolean = false
+) {
+    class Builder(private val apiKey: String) {
+        private var endpoint: String = "https://rpc.synor.io/v1"
+        private var wsEndpoint: String = "wss://rpc.synor.io/v1/ws"
+        private var network: Network = Network.MAINNET
+        private var timeout: Long = 30_000L
+        private var retries: Int = 3
+        private var debug: Boolean = false
+
+        fun endpoint(endpoint: String) = apply { this.endpoint = endpoint }
+        fun wsEndpoint(wsEndpoint: String) = apply { this.wsEndpoint = wsEndpoint }
+        fun network(network: Network) = apply { this.network = network }
+        fun timeout(timeout: Long) = apply { this.timeout = timeout }
+        fun retries(retries: Int) = apply { this.retries = retries }
+        fun debug(debug: Boolean) = apply { this.debug = debug }
+
+        fun build() = RpcConfig(apiKey, endpoint, wsEndpoint, network, timeout, retries, debug)
+    }
+
+    companion object {
+        fun builder(apiKey: String) = Builder(apiKey)
+    }
+}
+
+/**
+ * Block header information.
+ */
+@Serializable
+data class BlockHeader(
+    val hash: String,
+    val height: Long,
+    @SerialName("previous_hash") val previousHash: String,
+    val timestamp: Long,
+    val version: Int,
+    @SerialName("merkle_root") val merkleRoot: String,
+    val nonce: Long,
+    val difficulty: Double
+)
+
+/**
+ * A blockchain block.
+ */
+@Serializable
+data class Block(
+    val hash: String,
+    val height: Long,
+    @SerialName("previous_hash") val previousHash: String,
+    val timestamp: Long,
+    val version: Int,
+    @SerialName("merkle_root") val merkleRoot: String,
+    val nonce: Long,
+    val difficulty: Double,
+    val transactions: List<Transaction>,
+    val size: Int,
+    val weight: Int
+)
+
+/**
+ * A blockchain transaction.
+ */
+@Serializable
+data class Transaction(
+    val txid: String,
+    val hash: String,
+    val version: Int,
+    val size: Int,
+    val weight: Int,
+    @SerialName("lock_time") val lockTime: Long,
+    val inputs: List<TransactionInput>,
+    val outputs: List<TransactionOutput>,
+    val fee: Long,
+    val confirmations: Int,
+    @SerialName("block_hash") val blockHash: String? = null,
+    @SerialName("block_height") val blockHeight: Long? = null,
+    val timestamp: Long? = null,
+    val status: TransactionStatus = TransactionStatus.PENDING
+)
+
+/**
+ * Transaction input.
+ */
+@Serializable
+data class TransactionInput(
+    val txid: String,
+    val vout: Int,
+    @SerialName("script_sig") val scriptSig: String? = null,
+    val sequence: Long,
+    val witness: List<String>? = null
+)
+
+/**
+ * Transaction output.
+ */
+@Serializable
+data class TransactionOutput(
+    val value: Long,
+    val n: Int,
+    @SerialName("script_pubkey") val scriptPubKey: ScriptPubKey
+)
+
+/**
+ * Script public key.
+ */
+@Serializable
+data class ScriptPubKey(
+    val asm: String,
+    val hex: String,
+    val type: String,
+    val address: String? = null
+)
+
+/**
+ * Chain information.
+ */
+@Serializable
+data class ChainInfo(
+    val chain: String,
+    val blocks: Long,
+    val headers: Long,
+    @SerialName("best_block_hash") val bestBlockHash: String,
+    val difficulty: Double,
+    @SerialName("median_time") val medianTime: Long,
+    @SerialName("verification_progress") val verificationProgress: Double,
+    @SerialName("chain_work") val chainWork: String,
+    val pruned: Boolean
+)
+
+/**
+ * Mempool information.
+ */
+@Serializable
+data class MempoolInfo(
+    val size: Int,
+    val bytes: Long,
+    val usage: Long,
+    @SerialName("max_mempool") val maxMempool: Long,
+    @SerialName("mempool_min_fee") val mempoolMinFee: Double,
+    @SerialName("min_relay_tx_fee") val minRelayTxFee: Double
+)
+
+/**
+ * Fee estimate for transactions.
+ */
+@Serializable
+data class FeeEstimate(
+    val priority: Priority,
+    @SerialName("fee_rate") val feeRate: Long,
+    @SerialName("estimated_blocks") val estimatedBlocks: Int
+)
+
+/**
+ * Result of transaction submission.
+ */
+@Serializable
+data class SubmitResult(
+    val txid: String,
+    val accepted: Boolean,
+    val reason: String? = null
+)
+
+/**
+ * Subscription handle for WebSocket events.
+ */
+data class Subscription(
+    val id: String,
+    val channel: String,
+    private val onCancel: () -> Unit
+) {
+    fun cancel() = onCancel()
+}
+
+/**
+ * WebSocket message wrapper.
+ */
+@Serializable
+internal data class WsMessage(
+    val type: String,
+    val channel: String,
+    val data: String? = null,
+    val filter: String? = null
+)
+
+/**
+ * Exception thrown by RPC operations.
+ */
+class RpcException(
+    message: String,
+    val code: String? = null,
+    val statusCode: Int? = null,
+    cause: Throwable? = null
+) : Exception(message, cause)

sdk/kotlin/src/main/kotlin/io/synor/storage/SynorStorage.kt

@@ -0,0 +1,397 @@
+package io.synor.storage
+
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.engine.cio.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.request.*
+import io.ktor.client.request.forms.*
+import io.ktor.client.statement.*
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import io.ktor.utils.io.*
+import kotlinx.coroutines.delay
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
+import kotlinx.serialization.json.Json
+import java.io.Closeable
+
+/**
+ * Synor Storage SDK client for Kotlin.
+ *
+ * Provides IPFS-compatible decentralized storage with upload, download,
+ * pinning, and CAR file operations.
+ *
+ * Example:
+ * ```kotlin
+ * val storage = SynorStorage(StorageConfig.builder("your-api-key").build())
+ *
+ * // Upload a file
+ * val data = "Hello, World!".toByteArray()
+ * val result = storage.upload(data, UploadOptions(name = "hello.txt"))
+ * println("CID: ${result.cid}")
+ *
+ * // Download content
+ * val content = storage.download(result.cid)
+ * println("Content: ${String(content)}")
+ *
+ * // Pin content
+ * val pin = storage.pin(PinRequest(cid = result.cid, durationDays = 30))
+ * println("Pin status: ${pin.status}")
+ *
+ * storage.close()
+ * ```
+ */
+class SynorStorage(private val config: StorageConfig) : Closeable {
+
+    private val json = Json {
+        ignoreUnknownKeys = true
+        isLenient = true
+        encodeDefaults = true
+    }
+
+    private val client = HttpClient(CIO) {
+        install(ContentNegotiation) {
+            json(json)
+        }
+
+        install(HttpTimeout) {
+            requestTimeoutMillis = config.timeout
+            connectTimeoutMillis = config.timeout
+        }
+
+        defaultRequest {
+            header("Authorization", "Bearer ${config.apiKey}")
+        }
+    }
+
+    // Upload operations
+
+    /**
+     * Upload data to storage.
+     *
+     * @param data The data to upload
+     * @param options Upload options
+     * @return Upload response with CID
+     */
+    suspend fun upload(data: ByteArray, options: UploadOptions = UploadOptions()): UploadResponse {
+        return executeWithRetry {
+            val response = client.submitFormWithBinaryData(
+                url = "${config.endpoint}/upload",
+                formData = formData {
+                    append("file", data, Headers.build {
+                        append(HttpHeaders.ContentType, ContentType.Application.OctetStream)
+                        append(HttpHeaders.ContentDisposition, "filename=\"${options.name ?: "file"}\"")
+                    })
+                    options.name?.let { append("name", it) }
+                    append("wrap_with_directory", options.wrapWithDirectory.toString())
+                    append("hash_algorithm", options.hashAlgorithm.name.lowercase().replace("_", "-"))
+                    options.chunkSize?.let { append("chunk_size", it.toString()) }
+                    options.pinDurationDays?.let { append("pin_duration_days", it.toString()) }
+                }
+            )
+            handleResponse(response)
+        }
+    }
+
+    /**
+     * Upload multiple files as a directory.
+     *
+     * @param files List of file entries
+     * @param dirName Optional directory name
+     * @return Upload response with root CID
+     */
+    suspend fun uploadDirectory(files: List<FileEntry>, dirName: String? = null): UploadResponse {
+        return executeWithRetry {
+            val response = client.submitFormWithBinaryData(
+                url = "${config.endpoint}/upload/directory",
+                formData = formData {
+                    files.forEach { file ->
+                        append("files", file.content, Headers.build {
+                            append(HttpHeaders.ContentType, ContentType.Application.OctetStream)
+                            append(HttpHeaders.ContentDisposition, "filename=\"${file.path}\"")
+                        })
+                    }
+                    dirName?.let { append("name", it) }
+                }
+            )
+            handleResponse(response)
+        }
+    }
+
+    // Download operations
+
+    /**
+     * Download content by CID.
+     *
+     * @param cid The content identifier
+     * @return The content as bytes
+     */
+    suspend fun download(cid: String): ByteArray {
+        return executeWithRetry {
+            val response = client.get("${config.endpoint}/content/$cid")
+            if (response.status.isSuccess()) {
+                response.body()
+            } else {
+                throw StorageException(
+                    "Failed to download content: ${response.status}",
+                    statusCode = response.status.value
+                )
+            }
+        }
+    }
+
+    /**
+     * Download content as a stream.
+     *
+     * @param cid The content identifier
+     * @return Flow of byte chunks
+     */
+    fun downloadStream(cid: String): Flow<ByteArray> = flow {
+        val response = client.get("${config.endpoint}/content/$cid")
+        if (!response.status.isSuccess()) {
+            throw StorageException(
+                "Failed to download content: ${response.status}",
+                statusCode = response.status.value
+            )
+        }
+
+        val channel: ByteReadChannel = response.body()
+        val buffer = ByteArray(8192)
+        while (!channel.isClosedForRead) {
+            val bytesRead = channel.readAvailable(buffer)
+            if (bytesRead > 0) {
+                emit(buffer.copyOf(bytesRead))
+            }
+        }
+    }
+
+    /**
+     * Get the gateway URL for content.
+     *
+     * @param cid The content identifier
+     * @param path Optional path within directory
+     * @return Gateway URL
+     */
+    fun getGatewayUrl(cid: String, path: String? = null): String {
+        return if (path != null) {
+            "${config.gateway}/ipfs/$cid/$path"
+        } else {
+            "${config.gateway}/ipfs/$cid"
+        }
+    }
+
+    // Pinning operations
+
+    /**
+     * Pin content to ensure availability.
+     *
+     * @param request Pin request
+     * @return Pin status
+     */
+    suspend fun pin(request: PinRequest): Pin {
+        return post("/pins", request)
+    }
+
+    /**
+     * Unpin content.
+     *
+     * @param cid The content identifier
+     */
+    suspend fun unpin(cid: String) {
+        delete("/pins/$cid")
+    }
+
+    /**
+     * Get pin status.
+     *
+     * @param cid The content identifier
+     * @return Pin information
+     */
+    suspend fun getPinStatus(cid: String): Pin {
+        return get("/pins/$cid")
+    }
+
+    /**
+     * List all pins.
+     *
+     * @param status Optional status filter
+     * @param limit Maximum number of results
+     * @param offset Pagination offset
+     * @return List of pins
+     */
+    suspend fun listPins(
+        status: PinStatus? = null,
+        limit: Int = 50,
+        offset: Int = 0
+    ): List<Pin> {
+        val query = buildString {
+            append("?limit=$limit&offset=$offset")
+            status?.let { append("&status=${it.name.lowercase()}") }
+        }
+        return get("/pins$query")
+    }
+
+    // CAR file operations
+
+    /**
+     * Create a CAR file from entries.
+     *
+     * @param entries List of entries
+     * @return CAR file information
+     */
+    suspend fun createCar(entries: List<CarEntry>): CarFile {
+        return executeWithRetry {
+            val response = client.submitFormWithBinaryData(
+                url = "${config.endpoint}/car",
+                formData = formData {
+                    entries.forEach { entry ->
+                        append("files", entry.content, Headers.build {
+                            append(HttpHeaders.ContentType, ContentType.Application.OctetStream)
+                            append(HttpHeaders.ContentDisposition, "filename=\"${entry.path}\"")
+                        })
+                    }
+                }
+            )
+            handleResponse(response)
+        }
+    }
+
+    /**
+     * Import a CAR file.
+     *
+     * @param carData CAR file bytes
+     * @return List of imported CIDs
+     */
+    suspend fun importCar(carData: ByteArray): List<String> {
+        return executeWithRetry {
+            val response = client.submitFormWithBinaryData(
+                url = "${config.endpoint}/car/import",
+                formData = formData {
+                    append("file", carData, Headers.build {
+                        append(HttpHeaders.ContentType, ContentType.Application.OctetStream)
+                        append(HttpHeaders.ContentDisposition, "filename=\"archive.car\"")
+                    })
+                }
+            )
+            val result: Map<String, List<String>> = handleResponse(response)
+            result["cids"] ?: emptyList()
+        }
+    }
+
+    /**
+     * Export content as a CAR file.
+     *
+     * @param cid The content identifier
+     * @return CAR file bytes
+     */
+    suspend fun exportCar(cid: String): ByteArray {
+        return executeWithRetry {
+            val response = client.get("${config.endpoint}/car/$cid")
+            if (response.status.isSuccess()) {
+                response.body()
+            } else {
+                throw StorageException(
+                    "Failed to export CAR: ${response.status}",
+                    statusCode = response.status.value
+                )
+            }
+        }
+    }
+
+    // Directory operations
+
+    /**
+     * List directory contents.
+     *
+     * @param cid The directory CID
+     * @return List of entries
+     */
+    suspend fun listDirectory(cid: String): List<DirectoryEntry> {
+        return get("/content/$cid/ls")
+    }
+
+    // Statistics
+
+    /**
+     * Get storage statistics.
+     *
+     * @return Storage stats
+     */
+    suspend fun getStats(): StorageStats {
+        return get("/stats")
+    }
+
+    private suspend inline fun <reified T> get(path: String): T {
+        return executeWithRetry {
+            val response = client.get("${config.endpoint}$path") {
+                header("Content-Type", "application/json")
+            }
+            handleResponse(response)
+        }
+    }
+
+    private suspend inline fun <reified T, reified R> post(path: String, body: R): T {
+        return executeWithRetry {
+            val response = client.post("${config.endpoint}$path") {
+                header("Content-Type", "application/json")
+                setBody(body)
+            }
+            handleResponse(response)
+        }
+    }
+
+    private suspend fun delete(path: String) {
+        executeWithRetry {
+            val response = client.delete("${config.endpoint}$path")
+            if (!response.status.isSuccess()) {
+                throw StorageException(
+                    "Delete failed: ${response.status}",
+                    statusCode = response.status.value
+                )
+            }
+        }
+    }
+
+    private suspend inline fun <reified T> handleResponse(response: HttpResponse): T {
+        if (response.status.isSuccess()) {
+            return response.body()
+        }
+
+        val errorBody = try {
+            response.bodyAsText()
+        } catch (e: Exception) {
+            "Unknown error"
+        }
+
+        throw StorageException(
+            message = "Storage API error: $errorBody",
+            statusCode = response.status.value
+        )
+    }
+
+    private suspend inline fun <T> executeWithRetry(block: () -> T): T {
+        var lastException: Exception? = null
+
+        repeat(config.retries) { attempt ->
+            try {
+                return block()
+            } catch (e: Exception) {
+                lastException = e
+                if (config.debug) {
+                    println("Attempt ${attempt + 1} failed: ${e.message}")
+                }
+                if (attempt < config.retries - 1) {
+                    delay(1000L * (attempt + 1))
+                }
+            }
+        }
+
+        throw lastException ?: StorageException("Unknown error after ${config.retries} retries")
+    }
+
+    override fun close() {
+        client.close()
+    }
+}

sdk/kotlin/src/main/kotlin/io/synor/storage/Types.kt

@@ -0,0 +1,194 @@
+package io.synor.storage
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * Status of a pinned item.
+ */
+@Serializable
+enum class PinStatus {
+    @SerialName("queued") QUEUED,
+    @SerialName("pinning") PINNING,
+    @SerialName("pinned") PINNED,
+    @SerialName("failed") FAILED,
+    @SerialName("unpinned") UNPINNED
+}
+
+/**
+ * Hash algorithm for content addressing.
+ */
+@Serializable
+enum class HashAlgorithm {
+    @SerialName("sha2-256") SHA2_256,
+    @SerialName("blake3") BLAKE3
+}
+
+/**
+ * Type of directory entry.
+ */
+@Serializable
+enum class EntryType {
+    @SerialName("file") FILE,
+    @SerialName("directory") DIRECTORY
+}
+
+/**
+ * Configuration for the storage client.
+ */
+data class StorageConfig(
+    val apiKey: String,
+    val endpoint: String = "https://storage.synor.io/v1",
+    val gateway: String = "https://gateway.synor.io",
+    val timeout: Long = 60_000L,
+    val retries: Int = 3,
+    val debug: Boolean = false
+) {
+    class Builder(private val apiKey: String) {
+        private var endpoint: String = "https://storage.synor.io/v1"
+        private var gateway: String = "https://gateway.synor.io"
+        private var timeout: Long = 60_000L
+        private var retries: Int = 3
+        private var debug: Boolean = false
+
+        fun endpoint(endpoint: String) = apply { this.endpoint = endpoint }
+        fun gateway(gateway: String) = apply { this.gateway = gateway }
+        fun timeout(timeout: Long) = apply { this.timeout = timeout }
+        fun retries(retries: Int) = apply { this.retries = retries }
+        fun debug(debug: Boolean) = apply { this.debug = debug }
+
+        fun build() = StorageConfig(apiKey, endpoint, gateway, timeout, retries, debug)
+    }
+
+    companion object {
+        fun builder(apiKey: String) = Builder(apiKey)
+    }
+}
+
+/**
+ * Options for file upload.
+ */
+@Serializable
+data class UploadOptions(
+    val name: String? = null,
+    @SerialName("wrap_with_directory") val wrapWithDirectory: Boolean = false,
+    @SerialName("hash_algorithm") val hashAlgorithm: HashAlgorithm = HashAlgorithm.SHA2_256,
+    @SerialName("chunk_size") val chunkSize: Int? = null,
+    @SerialName("pin_duration_days") val pinDurationDays: Int? = null
+)
+
+/**
+ * Response from upload operation.
+ */
+@Serializable
+data class UploadResponse(
+    val cid: String,
+    val size: Long,
+    val name: String? = null,
+    @SerialName("created_at") val createdAt: String
+)
+
+/**
+ * Pin information.
+ */
+@Serializable
+data class Pin(
+    val cid: String,
+    val name: String? = null,
+    val status: PinStatus,
+    val size: Long,
+    @SerialName("created_at") val createdAt: String,
+    @SerialName("expires_at") val expiresAt: String? = null,
+    val delegates: List<String>? = null
+)
+
+/**
+ * Request to pin content.
+ */
+@Serializable
+data class PinRequest(
+    val cid: String,
+    val name: String? = null,
+    @SerialName("duration_days") val durationDays: Int? = null,
+    val origins: List<String>? = null,
+    val meta: Map<String, String>? = null
+)
+
+/**
+ * CAR (Content Addressable Archive) file.
+ */
+@Serializable
+data class CarFile(
+    val cid: String,
+    val size: Long,
+    val roots: List<String>,
+    @SerialName("created_at") val createdAt: String
+)
+
+/**
+ * Entry in a CAR file for creation.
+ */
+data class CarEntry(
+    val path: String,
+    val content: ByteArray
+) {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other !is CarEntry) return false
+        return path == other.path && content.contentEquals(other.content)
+    }
+
+    override fun hashCode(): Int {
+        return 31 * path.hashCode() + content.contentHashCode()
+    }
+}
+
+/**
+ * Directory entry.
+ */
+@Serializable
+data class DirectoryEntry(
+    val name: String,
+    val cid: String,
+    val size: Long,
+    val type: EntryType
+)
+
+/**
+ * File entry for directory creation.
+ */
+data class FileEntry(
+    val path: String,
+    val content: ByteArray
+) {
+    override fun equals(other: Any?): Boolean {
+        if (this === other) return true
+        if (other !is FileEntry) return false
+        return path == other.path && content.contentEquals(other.content)
+    }
+
+    override fun hashCode(): Int {
+        return 31 * path.hashCode() + content.contentHashCode()
+    }
+}
+
+/**
+ * Storage usage statistics.
+ */
+@Serializable
+data class StorageStats(
+    @SerialName("total_size") val totalSize: Long,
+    @SerialName("pin_count") val pinCount: Int,
+    @SerialName("bandwidth_used") val bandwidthUsed: Long,
+    @SerialName("quota_used") val quotaUsed: Double
+)
+
+/**
+ * Exception thrown by storage operations.
+ */
+class StorageException(
+    message: String,
+    val code: String? = null,
+    val statusCode: Int? = null,
+    cause: Throwable? = null
+) : Exception(message, cause)

sdk/kotlin/src/main/kotlin/io/synor/wallet/SynorWallet.kt

@@ -0,0 +1,246 @@
+package io.synor.wallet
+
+import io.ktor.client.*
+import io.ktor.client.call.*
+import io.ktor.client.engine.cio.*
+import io.ktor.client.plugins.*
+import io.ktor.client.plugins.contentnegotiation.*
+import io.ktor.client.request.*
+import io.ktor.client.statement.*
+import io.ktor.http.*
+import io.ktor.serialization.kotlinx.json.*
+import kotlinx.serialization.json.Json
+import java.io.Closeable
+
+/**
+ * Synor Wallet SDK client for Kotlin.
+ *
+ * Provides key management, transaction signing, and balance queries
+ * for the Synor blockchain.
+ *
+ * Example:
+ * ```kotlin
+ * val wallet = SynorWallet(WalletConfig.builder("your-api-key").build())
+ *
+ * // Create a new wallet
+ * val result = wallet.createWallet(WalletType.STANDARD)
+ * println("Wallet ID: ${result.wallet.id}")
+ * println("Mnemonic: ${result.mnemonic}")
+ *
+ * // Get balance
+ * val balance = wallet.getBalance(result.wallet.addresses[0].address)
+ * println("Balance: ${balance.total}")
+ *
+ * wallet.close()
+ * ```
+ */
+class SynorWallet(private val config: WalletConfig) : Closeable {
+
+    private val json = Json {
+        ignoreUnknownKeys = true
+        isLenient = true
+        encodeDefaults = true
+    }
+
+    private val client = HttpClient(CIO) {
+        install(ContentNegotiation) {
+            json(json)
+        }
+
+        install(HttpTimeout) {
+            requestTimeoutMillis = config.timeout
+            connectTimeoutMillis = config.timeout
+        }
+
+        defaultRequest {
+            header("Authorization", "Bearer ${config.apiKey}")
+            header("Content-Type", "application/json")
+        }
+    }
+
+    /**
+     * Create a new wallet.
+     *
+     * @param type The type of wallet to create
+     * @return Result containing the wallet and optionally the mnemonic
+     */
+    suspend fun createWallet(type: WalletType = WalletType.STANDARD): CreateWalletResult {
+        val request = CreateWalletRequest(type, config.network)
+        return post("/wallets", request)
+    }
+
+    /**
+     * Import a wallet from a mnemonic phrase.
+     *
+     * @param mnemonic The 12 or 24 word mnemonic phrase
+     * @param passphrase Optional BIP39 passphrase
+     * @return The imported wallet
+     */
+    suspend fun importWallet(mnemonic: String, passphrase: String? = null): Wallet {
+        val request = ImportWalletRequest(mnemonic, passphrase, config.network)
+        return post("/wallets/import", request)
+    }
+
+    /**
+     * Get a wallet by ID.
+     *
+     * @param walletId The wallet ID
+     * @return The wallet
+     */
+    suspend fun getWallet(walletId: String): Wallet {
+        return get("/wallets/$walletId")
+    }
+
+    /**
+     * Generate a new address for a wallet.
+     *
+     * @param walletId The wallet ID
+     * @param isChange Whether this is a change address
+     * @return The new address
+     */
+    suspend fun generateAddress(walletId: String, isChange: Boolean = false): Address {
+        return post("/wallets/$walletId/addresses", mapOf("is_change" to isChange))
+    }
+
+    /**
+     * Get a stealth address for privacy transactions.
+     *
+     * @param walletId The wallet ID
+     * @return The stealth address
+     */
+    suspend fun getStealthAddress(walletId: String): StealthAddress {
+        return get("/wallets/$walletId/stealth-address")
+    }
+
+    /**
+     * Sign a transaction.
+     *
+     * @param walletId The wallet ID to sign with
+     * @param transaction The transaction to sign
+     * @return The signed transaction
+     */
+    suspend fun signTransaction(walletId: String, transaction: Transaction): SignedTransaction {
+        val request = SignTransactionRequest(walletId, transaction)
+        return post("/transactions/sign", request)
+    }
+
+    /**
+     * Sign a message with a wallet address.
+     *
+     * @param walletId The wallet ID
+     * @param message The message to sign
+     * @param addressIndex The address index to use for signing
+     * @return The signature
+     */
+    suspend fun signMessage(walletId: String, message: String, addressIndex: Int = 0): Signature {
+        val request = SignMessageRequest(walletId, message, addressIndex)
+        return post("/messages/sign", request)
+    }
+
+    /**
+     * Verify a message signature.
+     *
+     * @param message The original message
+     * @param signature The signature to verify
+     * @param address The address that signed the message
+     * @return True if the signature is valid
+     */
+    suspend fun verifyMessage(message: String, signature: String, address: String): Boolean {
+        val request = mapOf(
+            "message" to message,
+            "signature" to signature,
+            "address" to address
+        )
+        val response: Map<String, Boolean> = post("/messages/verify", request)
+        return response["valid"] ?: false
+    }
+
+    /**
+     * Get the balance for an address.
+     *
+     * @param address The address to query
+     * @return The balance information
+     */
+    suspend fun getBalance(address: String): Balance {
+        return get("/addresses/$address/balance")
+    }
+
+    /**
+     * Get UTXOs for an address.
+     *
+     * @param address The address to query
+     * @param minConfirmations Minimum confirmations required
+     * @return List of UTXOs
+     */
+    suspend fun getUTXOs(address: String, minConfirmations: Int = 1): List<UTXO> {
+        return get("/addresses/$address/utxos?min_confirmations=$minConfirmations")
+    }
+
+    /**
+     * Estimate transaction fee.
+     *
+     * @param priority The transaction priority
+     * @return Estimated fee in satoshis per byte
+     */
+    suspend fun estimateFee(priority: Priority = Priority.MEDIUM): Long {
+        val response: Map<String, Long> = get("/fees/estimate?priority=${priority.name.lowercase()}")
+        return response["fee_per_byte"] ?: 0L
+    }
+
+    private suspend inline fun <reified T> get(path: String): T {
+        return executeWithRetry {
+            val response = client.get("${config.endpoint}$path")
+            handleResponse(response)
+        }
+    }
+
+    private suspend inline fun <reified T, reified R> post(path: String, body: R): T {
+        return executeWithRetry {
+            val response = client.post("${config.endpoint}$path") {
+                setBody(body)
+            }
+            handleResponse(response)
+        }
+    }
+
+    private suspend inline fun <reified T> handleResponse(response: HttpResponse): T {
+        if (response.status.isSuccess()) {
+            return response.body()
+        }
+
+        val errorBody = try {
+            response.bodyAsText()
+        } catch (e: Exception) {
+            "Unknown error"
+        }
+
+        throw WalletException(
+            message = "Wallet API error: $errorBody",
+            statusCode = response.status.value
+        )
+    }
+
+    private suspend inline fun <T> executeWithRetry(block: () -> T): T {
+        var lastException: Exception? = null
+
+        repeat(config.retries) { attempt ->
+            try {
+                return block()
+            } catch (e: Exception) {
+                lastException = e
+                if (config.debug) {
+                    println("Attempt ${attempt + 1} failed: ${e.message}")
+                }
+                if (attempt < config.retries - 1) {
+                    kotlinx.coroutines.delay(1000L * (attempt + 1))
+                }
+            }
+        }
+
+        throw lastException ?: WalletException("Unknown error after ${config.retries} retries")
+    }
+
+    override fun close() {
+        client.close()
+    }
+}

sdk/kotlin/src/main/kotlin/io/synor/wallet/Types.kt

@@ -0,0 +1,230 @@
+package io.synor.wallet
+
+import kotlinx.serialization.SerialName
+import kotlinx.serialization.Serializable
+
+/**
+ * Network environment for wallet operations.
+ */
+@Serializable
+enum class Network {
+    @SerialName("mainnet") MAINNET,
+    @SerialName("testnet") TESTNET,
+    @SerialName("devnet") DEVNET
+}
+
+/**
+ * Type of wallet to create.
+ */
+@Serializable
+enum class WalletType {
+    @SerialName("standard") STANDARD,
+    @SerialName("multisig") MULTISIG,
+    @SerialName("hardware") HARDWARE,
+    @SerialName("stealth") STEALTH
+}
+
+/**
+ * Transaction priority for fee estimation.
+ */
+@Serializable
+enum class Priority {
+    @SerialName("low") LOW,
+    @SerialName("medium") MEDIUM,
+    @SerialName("high") HIGH
+}
+
+/**
+ * Configuration for the wallet client.
+ */
+data class WalletConfig(
+    val apiKey: String,
+    val endpoint: String = "https://wallet.synor.io/v1",
+    val network: Network = Network.MAINNET,
+    val timeout: Long = 30_000L,
+    val retries: Int = 3,
+    val debug: Boolean = false
+) {
+    class Builder(private val apiKey: String) {
+        private var endpoint: String = "https://wallet.synor.io/v1"
+        private var network: Network = Network.MAINNET
+        private var timeout: Long = 30_000L
+        private var retries: Int = 3
+        private var debug: Boolean = false
+
+        fun endpoint(endpoint: String) = apply { this.endpoint = endpoint }
+        fun network(network: Network) = apply { this.network = network }
+        fun timeout(timeout: Long) = apply { this.timeout = timeout }
+        fun retries(retries: Int) = apply { this.retries = retries }
+        fun debug(debug: Boolean) = apply { this.debug = debug }
+
+        fun build() = WalletConfig(apiKey, endpoint, network, timeout, retries, debug)
+    }
+
+    companion object {
+        fun builder(apiKey: String) = Builder(apiKey)
+    }
+}
+
+/**
+ * A Synor wallet with addresses and keys.
+ */
+@Serializable
+data class Wallet(
+    val id: String,
+    val type: WalletType,
+    val network: Network,
+    val addresses: List<Address>,
+    @SerialName("created_at") val createdAt: String
+)
+
+/**
+ * A wallet address.
+ */
+@Serializable
+data class Address(
+    val address: String,
+    val index: Int,
+    @SerialName("is_change") val isChange: Boolean = false
+)
+
+/**
+ * Stealth address for privacy transactions.
+ */
+@Serializable
+data class StealthAddress(
+    @SerialName("spend_public_key") val spendPublicKey: String,
+    @SerialName("view_public_key") val viewPublicKey: String,
+    @SerialName("one_time_address") val oneTimeAddress: String
+)
+
+/**
+ * Result of wallet creation.
+ */
+@Serializable
+data class CreateWalletResult(
+    val wallet: Wallet,
+    val mnemonic: String? = null
+)
+
+/**
+ * Request to create a new wallet.
+ */
+@Serializable
+internal data class CreateWalletRequest(
+    val type: WalletType,
+    val network: Network
+)
+
+/**
+ * Request to import a wallet.
+ */
+@Serializable
+internal data class ImportWalletRequest(
+    val mnemonic: String,
+    val passphrase: String?,
+    val network: Network
+)
+
+/**
+ * A blockchain transaction.
+ */
+@Serializable
+data class Transaction(
+    val inputs: List<TransactionInput>,
+    val outputs: List<TransactionOutput>,
+    val fee: Long? = null,
+    val priority: Priority = Priority.MEDIUM
+)
+
+/**
+ * Transaction input (UTXO reference).
+ */
+@Serializable
+data class TransactionInput(
+    val txid: String,
+    val vout: Int,
+    val amount: Long
+)
+
+/**
+ * Transaction output.
+ */
+@Serializable
+data class TransactionOutput(
+    val address: String,
+    val amount: Long
+)
+
+/**
+ * A signed transaction ready for broadcast.
+ */
+@Serializable
+data class SignedTransaction(
+    val txid: String,
+    val hex: String,
+    val size: Int,
+    val fee: Long
+)
+
+/**
+ * Request to sign a transaction.
+ */
+@Serializable
+internal data class SignTransactionRequest(
+    @SerialName("wallet_id") val walletId: String,
+    val transaction: Transaction
+)
+
+/**
+ * Request to sign a message.
+ */
+@Serializable
+internal data class SignMessageRequest(
+    @SerialName("wallet_id") val walletId: String,
+    val message: String,
+    @SerialName("address_index") val addressIndex: Int
+)
+
+/**
+ * A cryptographic signature.
+ */
+@Serializable
+data class Signature(
+    val signature: String,
+    val address: String,
+    @SerialName("recovery_id") val recoveryId: Int? = null
+)
+
+/**
+ * Unspent transaction output.
+ */
+@Serializable
+data class UTXO(
+    val txid: String,
+    val vout: Int,
+    val amount: Long,
+    val address: String,
+    val confirmations: Int,
+    @SerialName("script_pubkey") val scriptPubKey: String? = null
+)
+
+/**
+ * Wallet balance information.
+ */
+@Serializable
+data class Balance(
+    val confirmed: Long,
+    val unconfirmed: Long,
+    val total: Long
+)
+
+/**
+ * Exception thrown by wallet operations.
+ */
+class WalletException(
+    message: String,
+    val code: String? = null,
+    val statusCode: Int? = null,
+    cause: Throwable? = null
+) : Exception(message, cause)

sdk/python/src/synor_bridge/__init__.py

@@ -0,0 +1,74 @@
+"""
+Synor Bridge SDK for Python
+
+Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+
+Example:
+    >>> from synor_bridge import SynorBridge
+    >>>
+    >>> bridge = SynorBridge(api_key="your-api-key")
+    >>>
+    >>> # Bridge tokens from Synor to Ethereum
+    >>> transfer = await bridge.bridge_to(
+    ...     asset="SYNR",
+    ...     amount="1000000000000000000",
+    ...     target_chain="ethereum",
+    ...     target_address="0x..."
+    ... )
+    >>> print(f"Transfer {transfer.id}: {transfer.status}")
+"""
+
+from .types import (
+    BridgeConfig,
+    Chain,
+    ChainId,
+    Asset,
+    AssetType,
+    WrappedAsset,
+    Transfer,
+    TransferStatus,
+    TransferDirection,
+    TransferFilter,
+    LockReceipt,
+    LockProof,
+    LockOptions,
+    BurnReceipt,
+    BurnProof,
+    BurnOptions,
+    MintOptions,
+    UnlockOptions,
+    FeeEstimate,
+    ExchangeRate,
+    ValidatorSignature,
+    SignedTransaction,
+    BridgeError,
+)
+from .client import SynorBridge
+
+__version__ = "0.1.0"
+__all__ = [
+    "SynorBridge",
+    "BridgeConfig",
+    "Chain",
+    "ChainId",
+    "Asset",
+    "AssetType",
+    "WrappedAsset",
+    "Transfer",
+    "TransferStatus",
+    "TransferDirection",
+    "TransferFilter",
+    "LockReceipt",
+    "LockProof",
+    "LockOptions",
+    "BurnReceipt",
+    "BurnProof",
+    "BurnOptions",
+    "MintOptions",
+    "UnlockOptions",
+    "FeeEstimate",
+    "ExchangeRate",
+    "ValidatorSignature",
+    "SignedTransaction",
+    "BridgeError",
+]

sdk/python/src/synor_bridge/client.py

@@ -0,0 +1,527 @@
+"""
+Synor Bridge SDK Client
+
+Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+"""
+
+import asyncio
+from typing import Optional, List, Dict, Any
+from urllib.parse import urlencode
+import httpx
+
+from .types import (
+    BridgeConfig,
+    BridgeError,
+    Chain,
+    ChainId,
+    Asset,
+    WrappedAsset,
+    Transfer,
+    TransferStatus,
+    TransferFilter,
+    LockReceipt,
+    LockProof,
+    LockOptions,
+    BurnReceipt,
+    BurnProof,
+    BurnOptions,
+    MintOptions,
+    UnlockOptions,
+    FeeEstimate,
+    ExchangeRate,
+    SignedTransaction,
+    DEFAULT_BRIDGE_ENDPOINT,
+)
+
+
+class SynorBridge:
+    """Synor Bridge Client for cross-chain transfers."""
+
+    def __init__(
+        self,
+        api_key: str,
+        endpoint: str = DEFAULT_BRIDGE_ENDPOINT,
+        timeout: float = 60.0,
+        retries: int = 3,
+        debug: bool = False,
+    ):
+        self.config = BridgeConfig(
+            api_key=api_key,
+            endpoint=endpoint,
+            timeout=timeout,
+            retries=retries,
+            debug=debug,
+        )
+        self._client = httpx.AsyncClient(
+            base_url=endpoint,
+            headers={
+                "Authorization": f"Bearer {api_key}",
+                "Content-Type": "application/json",
+                "X-SDK-Version": "python/0.1.0",
+            },
+            timeout=timeout,
+        )
+        self._closed = False
+
+    # ==================== Chain Operations ====================
+
+    async def get_supported_chains(self) -> List[Chain]:
+        """Get all supported chains."""
+        response = await self._request("GET", "/chains")
+        return [Chain.from_dict(c) for c in response.get("chains", [])]
+
+    async def get_chain(self, chain_id: ChainId) -> Chain:
+        """Get chain by ID."""
+        response = await self._request("GET", f"/chains/{chain_id}")
+        return Chain.from_dict(response)
+
+    async def is_chain_supported(self, chain_id: ChainId) -> bool:
+        """Check if chain is supported."""
+        try:
+            chain = await self.get_chain(chain_id)
+            return chain.supported
+        except BridgeError:
+            return False
+
+    # ==================== Asset Operations ====================
+
+    async def get_supported_assets(self, chain_id: ChainId) -> List[Asset]:
+        """Get supported assets for a chain."""
+        response = await self._request("GET", f"/chains/{chain_id}/assets")
+        return [Asset.from_dict(a) for a in response.get("assets", [])]
+
+    async def get_asset(self, asset_id: str) -> Asset:
+        """Get asset by ID."""
+        response = await self._request("GET", f"/assets/{asset_id}")
+        return Asset.from_dict(response)
+
+    async def get_wrapped_asset(
+        self, original_asset_id: str, target_chain: ChainId
+    ) -> WrappedAsset:
+        """Get wrapped asset mapping."""
+        response = await self._request(
+            "GET", f"/assets/{original_asset_id}/wrapped/{target_chain}"
+        )
+        return WrappedAsset.from_dict(response)
+
+    async def get_wrapped_assets(self, chain_id: ChainId) -> List[WrappedAsset]:
+        """Get all wrapped assets for a chain."""
+        response = await self._request("GET", f"/chains/{chain_id}/wrapped")
+        return [WrappedAsset.from_dict(a) for a in response.get("assets", [])]
+
+    # ==================== Fee & Rate Operations ====================
+
+    async def estimate_fee(
+        self,
+        asset: str,
+        amount: str,
+        source_chain: ChainId,
+        target_chain: ChainId,
+    ) -> FeeEstimate:
+        """Estimate bridge fee."""
+        response = await self._request(
+            "POST",
+            "/fees/estimate",
+            {
+                "asset": asset,
+                "amount": amount,
+                "sourceChain": source_chain,
+                "targetChain": target_chain,
+            },
+        )
+        return FeeEstimate.from_dict(response)
+
+    async def get_exchange_rate(
+        self, from_asset: str, to_asset: str
+    ) -> ExchangeRate:
+        """Get exchange rate between assets."""
+        response = await self._request("GET", f"/rates/{from_asset}/{to_asset}")
+        return ExchangeRate.from_dict(response)
+
+    # ==================== Lock-Mint Flow ====================
+
+    async def lock(
+        self,
+        asset: str,
+        amount: str,
+        target_chain: ChainId,
+        options: Optional[LockOptions] = None,
+    ) -> LockReceipt:
+        """
+        Lock assets on source chain for cross-chain transfer.
+        Step 1 of lock-mint flow.
+        """
+        body: Dict[str, Any] = {
+            "asset": asset,
+            "amount": amount,
+            "targetChain": target_chain,
+        }
+        if options:
+            if options.recipient:
+                body["recipient"] = options.recipient
+            if options.deadline:
+                body["deadline"] = options.deadline
+            if options.slippage is not None:
+                body["slippage"] = options.slippage
+
+        response = await self._request("POST", "/transfers/lock", body)
+        return LockReceipt.from_dict(response)
+
+    async def get_lock_proof(self, lock_receipt_id: str) -> LockProof:
+        """
+        Get lock proof for minting.
+        Step 2 of lock-mint flow (wait for confirmations).
+        """
+        response = await self._request(
+            "GET", f"/transfers/lock/{lock_receipt_id}/proof"
+        )
+        return LockProof.from_dict(response)
+
+    async def wait_for_lock_proof(
+        self,
+        lock_receipt_id: str,
+        poll_interval: float = 5.0,
+        max_wait: float = 600.0,
+    ) -> LockProof:
+        """
+        Wait for lock proof to be ready.
+        Polls until confirmations are sufficient.
+        """
+        elapsed = 0.0
+        while elapsed < max_wait:
+            try:
+                return await self.get_lock_proof(lock_receipt_id)
+            except BridgeError as e:
+                if e.code == "CONFIRMATIONS_PENDING":
+                    await asyncio.sleep(poll_interval)
+                    elapsed += poll_interval
+                    continue
+                raise
+
+        raise BridgeError(
+            "Timeout waiting for lock proof",
+            code="CONFIRMATIONS_PENDING",
+        )
+
+    async def mint(
+        self,
+        proof: LockProof,
+        target_address: str,
+        options: Optional[MintOptions] = None,
+    ) -> SignedTransaction:
+        """
+        Mint wrapped tokens on target chain.
+        Step 3 of lock-mint flow.
+        """
+        body: Dict[str, Any] = {
+            "proof": proof.to_dict(),
+            "targetAddress": target_address,
+        }
+        if options:
+            if options.gas_limit:
+                body["gasLimit"] = options.gas_limit
+            if options.max_fee_per_gas:
+                body["maxFeePerGas"] = options.max_fee_per_gas
+            if options.max_priority_fee_per_gas:
+                body["maxPriorityFeePerGas"] = options.max_priority_fee_per_gas
+
+        response = await self._request("POST", "/transfers/mint", body)
+        return SignedTransaction.from_dict(response)
+
+    # ==================== Burn-Unlock Flow ====================
+
+    async def burn(
+        self,
+        wrapped_asset: str,
+        amount: str,
+        options: Optional[BurnOptions] = None,
+    ) -> BurnReceipt:
+        """
+        Burn wrapped tokens on current chain.
+        Step 1 of burn-unlock flow.
+        """
+        body: Dict[str, Any] = {
+            "wrappedAsset": wrapped_asset,
+            "amount": amount,
+        }
+        if options:
+            if options.recipient:
+                body["recipient"] = options.recipient
+            if options.deadline:
+                body["deadline"] = options.deadline
+
+        response = await self._request("POST", "/transfers/burn", body)
+        return BurnReceipt.from_dict(response)
+
+    async def get_burn_proof(self, burn_receipt_id: str) -> BurnProof:
+        """
+        Get burn proof for unlocking.
+        Step 2 of burn-unlock flow (wait for confirmations).
+        """
+        response = await self._request(
+            "GET", f"/transfers/burn/{burn_receipt_id}/proof"
+        )
+        return BurnProof.from_dict(response)
+
+    async def wait_for_burn_proof(
+        self,
+        burn_receipt_id: str,
+        poll_interval: float = 5.0,
+        max_wait: float = 600.0,
+    ) -> BurnProof:
+        """
+        Wait for burn proof to be ready.
+        Polls until confirmations are sufficient.
+        """
+        elapsed = 0.0
+        while elapsed < max_wait:
+            try:
+                return await self.get_burn_proof(burn_receipt_id)
+            except BridgeError as e:
+                if e.code == "CONFIRMATIONS_PENDING":
+                    await asyncio.sleep(poll_interval)
+                    elapsed += poll_interval
+                    continue
+                raise
+
+        raise BridgeError(
+            "Timeout waiting for burn proof",
+            code="CONFIRMATIONS_PENDING",
+        )
+
+    async def unlock(
+        self,
+        proof: BurnProof,
+        options: Optional[UnlockOptions] = None,
+    ) -> SignedTransaction:
+        """
+        Unlock original tokens on source chain.
+        Step 3 of burn-unlock flow.
+        """
+        body: Dict[str, Any] = {"proof": proof.to_dict()}
+        if options:
+            if options.gas_limit:
+                body["gasLimit"] = options.gas_limit
+            if options.gas_price:
+                body["gasPrice"] = options.gas_price
+
+        response = await self._request("POST", "/transfers/unlock", body)
+        return SignedTransaction.from_dict(response)
+
+    # ==================== Transfer Management ====================
+
+    async def get_transfer(self, transfer_id: str) -> Transfer:
+        """Get transfer by ID."""
+        response = await self._request("GET", f"/transfers/{transfer_id}")
+        return Transfer.from_dict(response)
+
+    async def get_transfer_status(self, transfer_id: str) -> TransferStatus:
+        """Get transfer status."""
+        transfer = await self.get_transfer(transfer_id)
+        return transfer.status
+
+    async def list_transfers(
+        self, filter: Optional[TransferFilter] = None
+    ) -> List[Transfer]:
+        """List transfers with optional filters."""
+        params: Dict[str, str] = {}
+        if filter:
+            if filter.status:
+                params["status"] = filter.status.value
+            if filter.source_chain:
+                params["sourceChain"] = filter.source_chain
+            if filter.target_chain:
+                params["targetChain"] = filter.target_chain
+            if filter.asset:
+                params["asset"] = filter.asset
+            if filter.sender:
+                params["sender"] = filter.sender
+            if filter.recipient:
+                params["recipient"] = filter.recipient
+            if filter.from_date is not None:
+                params["fromDate"] = str(filter.from_date)
+            if filter.to_date is not None:
+                params["toDate"] = str(filter.to_date)
+            if filter.limit is not None:
+                params["limit"] = str(filter.limit)
+            if filter.offset is not None:
+                params["offset"] = str(filter.offset)
+
+        path = "/transfers"
+        if params:
+            path = f"/transfers?{urlencode(params)}"
+
+        response = await self._request("GET", path)
+        return [Transfer.from_dict(t) for t in response.get("transfers", [])]
+
+    async def wait_for_transfer(
+        self,
+        transfer_id: str,
+        poll_interval: float = 10.0,
+        max_wait: float = 1800.0,
+    ) -> Transfer:
+        """Wait for transfer to complete."""
+        final_statuses = {
+            TransferStatus.COMPLETED,
+            TransferStatus.FAILED,
+            TransferStatus.REFUNDED,
+        }
+        elapsed = 0.0
+
+        while elapsed < max_wait:
+            transfer = await self.get_transfer(transfer_id)
+            if transfer.status in final_statuses:
+                return transfer
+            await asyncio.sleep(poll_interval)
+            elapsed += poll_interval
+
+        raise BridgeError("Timeout waiting for transfer completion")
+
+    # ==================== Convenience Methods ====================
+
+    async def bridge_to(
+        self,
+        asset: str,
+        amount: str,
+        target_chain: ChainId,
+        target_address: str,
+        lock_options: Optional[LockOptions] = None,
+        mint_options: Optional[MintOptions] = None,
+    ) -> Transfer:
+        """
+        Execute complete lock-mint transfer.
+        Combines lock, wait for proof, and mint into single operation.
+        """
+        # Lock on source chain
+        lock_receipt = await self.lock(asset, amount, target_chain, lock_options)
+
+        if self.config.debug:
+            print(f"Locked: {lock_receipt.id}, waiting for confirmations...")
+
+        # Wait for proof
+        proof = await self.wait_for_lock_proof(lock_receipt.id)
+
+        if self.config.debug:
+            print(f"Proof ready, minting on {target_chain}...")
+
+        # Mint on target chain
+        await self.mint(proof, target_address, mint_options)
+
+        # Return final transfer status
+        return await self.wait_for_transfer(lock_receipt.id)
+
+    async def bridge_back(
+        self,
+        wrapped_asset: str,
+        amount: str,
+        burn_options: Optional[BurnOptions] = None,
+        unlock_options: Optional[UnlockOptions] = None,
+    ) -> Transfer:
+        """
+        Execute complete burn-unlock transfer.
+        Combines burn, wait for proof, and unlock into single operation.
+        """
+        # Burn wrapped tokens
+        burn_receipt = await self.burn(wrapped_asset, amount, burn_options)
+
+        if self.config.debug:
+            print(f"Burned: {burn_receipt.id}, waiting for confirmations...")
+
+        # Wait for proof
+        proof = await self.wait_for_burn_proof(burn_receipt.id)
+
+        if self.config.debug:
+            print(f"Proof ready, unlocking on {burn_receipt.target_chain}...")
+
+        # Unlock on original chain
+        await self.unlock(proof, unlock_options)
+
+        # Return final transfer status
+        return await self.wait_for_transfer(burn_receipt.id)
+
+    # ==================== Lifecycle ====================
+
+    async def close(self) -> None:
+        """Close the client."""
+        self._closed = True
+        await self._client.aclose()
+
+    def is_closed(self) -> bool:
+        """Check if client is closed."""
+        return self._closed
+
+    async def health_check(self) -> bool:
+        """Health check."""
+        try:
+            response = await self._request("GET", "/health")
+            return response.get("status") == "healthy"
+        except BridgeError:
+            return False
+
+    async def __aenter__(self) -> "SynorBridge":
+        return self
+
+    async def __aexit__(self, exc_type, exc_val, exc_tb) -> None:
+        await self.close()
+
+    # ==================== Private Methods ====================
+
+    async def _request(
+        self,
+        method: str,
+        path: str,
+        body: Optional[Dict[str, Any]] = None,
+    ) -> Dict[str, Any]:
+        """Make HTTP request with retries."""
+        if self._closed:
+            raise BridgeError("Client has been closed")
+
+        last_error: Optional[Exception] = None
+
+        for attempt in range(self.config.retries):
+            try:
+                return await self._do_request(method, path, body)
+            except BridgeError as e:
+                if self.config.debug:
+                    print(f"Attempt {attempt + 1} failed: {e}")
+                last_error = e
+                if attempt < self.config.retries - 1:
+                    await asyncio.sleep(2**attempt)
+
+        if last_error:
+            raise last_error
+        raise BridgeError("Unknown error after retries")
+
+    async def _do_request(
+        self,
+        method: str,
+        path: str,
+        body: Optional[Dict[str, Any]] = None,
+    ) -> Dict[str, Any]:
+        """Execute HTTP request."""
+        try:
+            response = await self._client.request(
+                method,
+                path,
+                json=body if body else None,
+            )
+
+            if response.status_code >= 400:
+                error_body = response.json() if response.content else {}
+                message = (
+                    error_body.get("message")
+                    or error_body.get("error")
+                    or f"HTTP {response.status_code}"
+                )
+                raise BridgeError(
+                    message,
+                    code=error_body.get("code"),
+                    status_code=response.status_code,
+                    details=error_body,
+                )
+
+            return response.json()
+        except httpx.TimeoutException as e:
+            raise BridgeError(f"Request timeout: {e}")
+        except httpx.RequestError as e:
+            raise BridgeError(f"Request failed: {e}")

sdk/python/src/synor_bridge/types.py

@@ -0,0 +1,537 @@
+"""
+Synor Bridge SDK Types
+
+Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+"""
+
+from dataclasses import dataclass, field
+from typing import Optional, List, Dict, Any, Literal
+from enum import Enum
+
+
+# ==================== Chain Types ====================
+
+ChainId = Literal[
+    "synor",
+    "ethereum",
+    "polygon",
+    "arbitrum",
+    "optimism",
+    "bsc",
+    "avalanche",
+    "solana",
+    "cosmos",
+]
+
+
+@dataclass
+class NativeCurrency:
+    """Native currency info for a chain."""
+    name: str
+    symbol: str
+    decimals: int
+
+
+@dataclass
+class Chain:
+    """Blockchain network information."""
+    id: ChainId
+    name: str
+    chain_id: int
+    rpc_url: str
+    explorer_url: str
+    native_currency: NativeCurrency
+    confirmations: int
+    estimated_block_time: int  # seconds
+    supported: bool
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "Chain":
+        native = data.get("nativeCurrency", data.get("native_currency", {}))
+        return cls(
+            id=data["id"],
+            name=data["name"],
+            chain_id=data.get("chainId", data.get("chain_id", 0)),
+            rpc_url=data.get("rpcUrl", data.get("rpc_url", "")),
+            explorer_url=data.get("explorerUrl", data.get("explorer_url", "")),
+            native_currency=NativeCurrency(
+                name=native.get("name", ""),
+                symbol=native.get("symbol", ""),
+                decimals=native.get("decimals", 18),
+            ),
+            confirmations=data.get("confirmations", 0),
+            estimated_block_time=data.get("estimatedBlockTime", data.get("estimated_block_time", 0)),
+            supported=data.get("supported", True),
+        )
+
+
+# ==================== Asset Types ====================
+
+class AssetType(str, Enum):
+    """Asset type enumeration."""
+    NATIVE = "native"
+    ERC20 = "erc20"
+    ERC721 = "erc721"
+    ERC1155 = "erc1155"
+
+
+@dataclass
+class Asset:
+    """Asset information."""
+    id: str
+    symbol: str
+    name: str
+    type: AssetType
+    chain: ChainId
+    decimals: int
+    contract_address: Optional[str] = None
+    logo_url: Optional[str] = None
+    verified: bool = False
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "Asset":
+        return cls(
+            id=data["id"],
+            symbol=data["symbol"],
+            name=data["name"],
+            type=AssetType(data["type"]),
+            chain=data["chain"],
+            decimals=data.get("decimals", 18),
+            contract_address=data.get("contractAddress", data.get("contract_address")),
+            logo_url=data.get("logoUrl", data.get("logo_url")),
+            verified=data.get("verified", False),
+        )
+
+
+@dataclass
+class WrappedAsset:
+    """Wrapped asset mapping."""
+    original_asset: Asset
+    wrapped_asset: Asset
+    chain: ChainId
+    bridge_contract: str
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "WrappedAsset":
+        return cls(
+            original_asset=Asset.from_dict(data.get("originalAsset", data.get("original_asset", {}))),
+            wrapped_asset=Asset.from_dict(data.get("wrappedAsset", data.get("wrapped_asset", {}))),
+            chain=data["chain"],
+            bridge_contract=data.get("bridgeContract", data.get("bridge_contract", "")),
+        )
+
+
+# ==================== Transfer Types ====================
+
+class TransferStatus(str, Enum):
+    """Transfer status enumeration."""
+    PENDING = "pending"
+    LOCKED = "locked"
+    CONFIRMING = "confirming"
+    MINTING = "minting"
+    COMPLETED = "completed"
+    FAILED = "failed"
+    REFUNDED = "refunded"
+
+
+class TransferDirection(str, Enum):
+    """Transfer direction enumeration."""
+    LOCK_MINT = "lock_mint"
+    BURN_UNLOCK = "burn_unlock"
+
+
+@dataclass
+class ValidatorSignature:
+    """Validator signature for proof."""
+    validator: str
+    signature: str
+    timestamp: int
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "ValidatorSignature":
+        return cls(
+            validator=data["validator"],
+            signature=data["signature"],
+            timestamp=data["timestamp"],
+        )
+
+
+@dataclass
+class LockReceipt:
+    """Lock receipt from source chain."""
+    id: str
+    tx_hash: str
+    source_chain: ChainId
+    target_chain: ChainId
+    asset: Asset
+    amount: str
+    sender: str
+    recipient: str
+    lock_timestamp: int
+    confirmations: int
+    required_confirmations: int
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "LockReceipt":
+        return cls(
+            id=data["id"],
+            tx_hash=data.get("txHash", data.get("tx_hash", "")),
+            source_chain=data.get("sourceChain", data.get("source_chain", "")),
+            target_chain=data.get("targetChain", data.get("target_chain", "")),
+            asset=Asset.from_dict(data["asset"]),
+            amount=data["amount"],
+            sender=data["sender"],
+            recipient=data["recipient"],
+            lock_timestamp=data.get("lockTimestamp", data.get("lock_timestamp", 0)),
+            confirmations=data.get("confirmations", 0),
+            required_confirmations=data.get("requiredConfirmations", data.get("required_confirmations", 0)),
+        )
+
+
+@dataclass
+class LockProof:
+    """Proof for minting on target chain."""
+    lock_receipt: LockReceipt
+    merkle_proof: List[str]
+    block_header: str
+    signatures: List[ValidatorSignature]
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "LockProof":
+        return cls(
+            lock_receipt=LockReceipt.from_dict(data.get("lockReceipt", data.get("lock_receipt", {}))),
+            merkle_proof=data.get("merkleProof", data.get("merkle_proof", [])),
+            block_header=data.get("blockHeader", data.get("block_header", "")),
+            signatures=[ValidatorSignature.from_dict(s) for s in data.get("signatures", [])],
+        )
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "lockReceipt": {
+                "id": self.lock_receipt.id,
+                "txHash": self.lock_receipt.tx_hash,
+                "sourceChain": self.lock_receipt.source_chain,
+                "targetChain": self.lock_receipt.target_chain,
+                "asset": {
+                    "id": self.lock_receipt.asset.id,
+                    "symbol": self.lock_receipt.asset.symbol,
+                    "name": self.lock_receipt.asset.name,
+                    "type": self.lock_receipt.asset.type.value,
+                    "chain": self.lock_receipt.asset.chain,
+                    "decimals": self.lock_receipt.asset.decimals,
+                },
+                "amount": self.lock_receipt.amount,
+                "sender": self.lock_receipt.sender,
+                "recipient": self.lock_receipt.recipient,
+                "lockTimestamp": self.lock_receipt.lock_timestamp,
+                "confirmations": self.lock_receipt.confirmations,
+                "requiredConfirmations": self.lock_receipt.required_confirmations,
+            },
+            "merkleProof": self.merkle_proof,
+            "blockHeader": self.block_header,
+            "signatures": [
+                {"validator": s.validator, "signature": s.signature, "timestamp": s.timestamp}
+                for s in self.signatures
+            ],
+        }
+
+
+@dataclass
+class BurnReceipt:
+    """Burn receipt for unlocking."""
+    id: str
+    tx_hash: str
+    source_chain: ChainId
+    target_chain: ChainId
+    wrapped_asset: Asset
+    original_asset: Asset
+    amount: str
+    sender: str
+    recipient: str
+    burn_timestamp: int
+    confirmations: int
+    required_confirmations: int
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "BurnReceipt":
+        return cls(
+            id=data["id"],
+            tx_hash=data.get("txHash", data.get("tx_hash", "")),
+            source_chain=data.get("sourceChain", data.get("source_chain", "")),
+            target_chain=data.get("targetChain", data.get("target_chain", "")),
+            wrapped_asset=Asset.from_dict(data.get("wrappedAsset", data.get("wrapped_asset", {}))),
+            original_asset=Asset.from_dict(data.get("originalAsset", data.get("original_asset", {}))),
+            amount=data["amount"],
+            sender=data["sender"],
+            recipient=data["recipient"],
+            burn_timestamp=data.get("burnTimestamp", data.get("burn_timestamp", 0)),
+            confirmations=data.get("confirmations", 0),
+            required_confirmations=data.get("requiredConfirmations", data.get("required_confirmations", 0)),
+        )
+
+
+@dataclass
+class BurnProof:
+    """Proof for unlocking on original chain."""
+    burn_receipt: BurnReceipt
+    merkle_proof: List[str]
+    block_header: str
+    signatures: List[ValidatorSignature]
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "BurnProof":
+        return cls(
+            burn_receipt=BurnReceipt.from_dict(data.get("burnReceipt", data.get("burn_receipt", {}))),
+            merkle_proof=data.get("merkleProof", data.get("merkle_proof", [])),
+            block_header=data.get("blockHeader", data.get("block_header", "")),
+            signatures=[ValidatorSignature.from_dict(s) for s in data.get("signatures", [])],
+        )
+
+    def to_dict(self) -> Dict[str, Any]:
+        return {
+            "burnReceipt": {
+                "id": self.burn_receipt.id,
+                "txHash": self.burn_receipt.tx_hash,
+                "sourceChain": self.burn_receipt.source_chain,
+                "targetChain": self.burn_receipt.target_chain,
+                "wrappedAsset": {
+                    "id": self.burn_receipt.wrapped_asset.id,
+                    "symbol": self.burn_receipt.wrapped_asset.symbol,
+                    "name": self.burn_receipt.wrapped_asset.name,
+                    "type": self.burn_receipt.wrapped_asset.type.value,
+                    "chain": self.burn_receipt.wrapped_asset.chain,
+                    "decimals": self.burn_receipt.wrapped_asset.decimals,
+                },
+                "originalAsset": {
+                    "id": self.burn_receipt.original_asset.id,
+                    "symbol": self.burn_receipt.original_asset.symbol,
+                    "name": self.burn_receipt.original_asset.name,
+                    "type": self.burn_receipt.original_asset.type.value,
+                    "chain": self.burn_receipt.original_asset.chain,
+                    "decimals": self.burn_receipt.original_asset.decimals,
+                },
+                "amount": self.burn_receipt.amount,
+                "sender": self.burn_receipt.sender,
+                "recipient": self.burn_receipt.recipient,
+                "burnTimestamp": self.burn_receipt.burn_timestamp,
+                "confirmations": self.burn_receipt.confirmations,
+                "requiredConfirmations": self.burn_receipt.required_confirmations,
+            },
+            "merkleProof": self.merkle_proof,
+            "blockHeader": self.block_header,
+            "signatures": [
+                {"validator": s.validator, "signature": s.signature, "timestamp": s.timestamp}
+                for s in self.signatures
+            ],
+        }
+
+
+@dataclass
+class Transfer:
+    """Complete transfer record."""
+    id: str
+    direction: TransferDirection
+    status: TransferStatus
+    source_chain: ChainId
+    target_chain: ChainId
+    asset: Asset
+    amount: str
+    sender: str
+    recipient: str
+    fee: str
+    fee_asset: Asset
+    created_at: int
+    updated_at: int
+    source_tx_hash: Optional[str] = None
+    target_tx_hash: Optional[str] = None
+    completed_at: Optional[int] = None
+    error_message: Optional[str] = None
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "Transfer":
+        return cls(
+            id=data["id"],
+            direction=TransferDirection(data["direction"]),
+            status=TransferStatus(data["status"]),
+            source_chain=data.get("sourceChain", data.get("source_chain", "")),
+            target_chain=data.get("targetChain", data.get("target_chain", "")),
+            asset=Asset.from_dict(data["asset"]),
+            amount=data["amount"],
+            sender=data["sender"],
+            recipient=data["recipient"],
+            fee=data["fee"],
+            fee_asset=Asset.from_dict(data.get("feeAsset", data.get("fee_asset", {}))),
+            created_at=data.get("createdAt", data.get("created_at", 0)),
+            updated_at=data.get("updatedAt", data.get("updated_at", 0)),
+            source_tx_hash=data.get("sourceTxHash", data.get("source_tx_hash")),
+            target_tx_hash=data.get("targetTxHash", data.get("target_tx_hash")),
+            completed_at=data.get("completedAt", data.get("completed_at")),
+            error_message=data.get("errorMessage", data.get("error_message")),
+        )
+
+
+# ==================== Fee Types ====================
+
+@dataclass
+class FeeEstimate:
+    """Fee estimate for bridge transfer."""
+    bridge_fee: str
+    gas_fee_source: str
+    gas_fee_target: str
+    total_fee: str
+    fee_asset: Asset
+    estimated_time: int  # seconds
+    exchange_rate: Optional[str] = None
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "FeeEstimate":
+        return cls(
+            bridge_fee=data.get("bridgeFee", data.get("bridge_fee", "0")),
+            gas_fee_source=data.get("gasFeeSource", data.get("gas_fee_source", "0")),
+            gas_fee_target=data.get("gasFeeTarget", data.get("gas_fee_target", "0")),
+            total_fee=data.get("totalFee", data.get("total_fee", "0")),
+            fee_asset=Asset.from_dict(data.get("feeAsset", data.get("fee_asset", {}))),
+            estimated_time=data.get("estimatedTime", data.get("estimated_time", 0)),
+            exchange_rate=data.get("exchangeRate", data.get("exchange_rate")),
+        )
+
+
+@dataclass
+class ExchangeRate:
+    """Exchange rate between assets."""
+    from_asset: Asset
+    to_asset: Asset
+    rate: str
+    inverse_rate: str
+    last_updated: int
+    source: str
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "ExchangeRate":
+        return cls(
+            from_asset=Asset.from_dict(data.get("fromAsset", data.get("from_asset", {}))),
+            to_asset=Asset.from_dict(data.get("toAsset", data.get("to_asset", {}))),
+            rate=data["rate"],
+            inverse_rate=data.get("inverseRate", data.get("inverse_rate", "")),
+            last_updated=data.get("lastUpdated", data.get("last_updated", 0)),
+            source=data.get("source", ""),
+        )
+
+
+# ==================== Transaction Types ====================
+
+@dataclass
+class SignedTransaction:
+    """Signed transaction result."""
+    tx_hash: str
+    chain: ChainId
+    from_address: str
+    to_address: str
+    value: str
+    data: str
+    gas_limit: str
+    nonce: int
+    signature: str
+    gas_price: Optional[str] = None
+    max_fee_per_gas: Optional[str] = None
+    max_priority_fee_per_gas: Optional[str] = None
+
+    @classmethod
+    def from_dict(cls, data: Dict[str, Any]) -> "SignedTransaction":
+        return cls(
+            tx_hash=data.get("txHash", data.get("tx_hash", "")),
+            chain=data["chain"],
+            from_address=data.get("from", data.get("from_address", "")),
+            to_address=data.get("to", data.get("to_address", "")),
+            value=data["value"],
+            data=data["data"],
+            gas_limit=data.get("gasLimit", data.get("gas_limit", "")),
+            nonce=data["nonce"],
+            signature=data["signature"],
+            gas_price=data.get("gasPrice", data.get("gas_price")),
+            max_fee_per_gas=data.get("maxFeePerGas", data.get("max_fee_per_gas")),
+            max_priority_fee_per_gas=data.get("maxPriorityFeePerGas", data.get("max_priority_fee_per_gas")),
+        )
+
+
+# ==================== Filter Types ====================
+
+@dataclass
+class TransferFilter:
+    """Filter for listing transfers."""
+    status: Optional[TransferStatus] = None
+    source_chain: Optional[ChainId] = None
+    target_chain: Optional[ChainId] = None
+    asset: Optional[str] = None
+    sender: Optional[str] = None
+    recipient: Optional[str] = None
+    from_date: Optional[int] = None
+    to_date: Optional[int] = None
+    limit: Optional[int] = None
+    offset: Optional[int] = None
+
+
+# ==================== Options Types ====================
+
+@dataclass
+class LockOptions:
+    """Options for lock operation."""
+    recipient: Optional[str] = None
+    deadline: Optional[int] = None
+    slippage: Optional[float] = None
+
+
+@dataclass
+class MintOptions:
+    """Options for mint operation."""
+    gas_limit: Optional[str] = None
+    max_fee_per_gas: Optional[str] = None
+    max_priority_fee_per_gas: Optional[str] = None
+
+
+@dataclass
+class BurnOptions:
+    """Options for burn operation."""
+    recipient: Optional[str] = None
+    deadline: Optional[int] = None
+
+
+@dataclass
+class UnlockOptions:
+    """Options for unlock operation."""
+    gas_limit: Optional[str] = None
+    gas_price: Optional[str] = None
+
+
+# ==================== Config Types ====================
+
+DEFAULT_BRIDGE_ENDPOINT = "https://bridge.synor.io/v1"
+
+
+@dataclass
+class BridgeConfig:
+    """Bridge configuration."""
+    api_key: str
+    endpoint: str = DEFAULT_BRIDGE_ENDPOINT
+    timeout: float = 60.0
+    retries: int = 3
+    debug: bool = False
+
+
+# ==================== Error Types ====================
+
+class BridgeError(Exception):
+    """Bridge-specific error."""
+
+    def __init__(
+        self,
+        message: str,
+        code: Optional[str] = None,
+        status_code: Optional[int] = None,
+        details: Optional[Dict[str, Any]] = None,
+    ):
+        super().__init__(message)
+        self.message = message
+        self.code = code
+        self.status_code = status_code
+        self.details = details or {}

sdk/python/src/synor_database/__init__.py

@@ -0,0 +1,71 @@
+"""
+Synor Database SDK for Python
+
+Multi-model database supporting Key-Value, Document, Vector, and Time Series data.
+
+Example:
+    >>> from synor_database import SynorDatabase
+    >>>
+    >>> db = SynorDatabase(api_key="your-api-key")
+    >>>
+    >>> # Key-Value operations
+    >>> await db.kv.set("user:1", {"name": "Alice"})
+    >>> user = await db.kv.get("user:1")
+    >>>
+    >>> # Document operations
+    >>> doc = await db.documents.create("users", {"name": "Bob", "age": 30})
+    >>> results = await db.documents.query("users", filter={"age": {"$gt": 25}})
+    >>>
+    >>> # Vector operations
+    >>> await db.vectors.upsert("embeddings", [{"id": "1", "vector": [0.1, 0.2, ...]}])
+    >>> similar = await db.vectors.search("embeddings", query_vector, top_k=10)
+    >>>
+    >>> # Time series operations
+    >>> await db.timeseries.write("metrics", [{"timestamp": time.time(), "value": 42.5}])
+    >>> data = await db.timeseries.query("metrics", start="-1h", end="now")
+"""
+
+from .types import (
+    DatabaseConfig,
+    KeyValueEntry,
+    SetOptions,
+    ListOptions,
+    ListResult,
+    Document,
+    QueryOptions,
+    QueryResult,
+    VectorEntry,
+    SearchOptions,
+    SearchResult,
+    VectorCollectionConfig,
+    DataPoint,
+    TimeRange,
+    TimeSeriesQueryOptions,
+    TimeSeriesResult,
+    DatabaseStats,
+    DatabaseError,
+)
+from .client import SynorDatabase
+
+__version__ = "0.1.0"
+__all__ = [
+    "SynorDatabase",
+    "DatabaseConfig",
+    "KeyValueEntry",
+    "SetOptions",
+    "ListOptions",
+    "ListResult",
+    "Document",
+    "QueryOptions",
+    "QueryResult",
+    "VectorEntry",
+    "SearchOptions",
+    "SearchResult",
+    "VectorCollectionConfig",
+    "DataPoint",
+    "TimeRange",
+    "TimeSeriesQueryOptions",
+    "TimeSeriesResult",
+    "DatabaseStats",
+    "DatabaseError",
+]

sdk/python/src/synor_database/client.py

@@ -0,0 +1,633 @@
+"""
+Synor Database SDK Client
+"""
+
+from typing import Any, Dict, List, Optional, Union
+from datetime import datetime
+from urllib.parse import urlencode
+import httpx
+
+from .types import (
+    DatabaseConfig,
+    Network,
+    KeyValueEntry,
+    SetOptions,
+    ListOptions,
+    ListResult,
+    Document,
+    QueryOptions,
+    QueryResult,
+    VectorEntry,
+    SearchOptions,
+    SearchResult,
+    VectorCollectionConfig,
+    VectorCollectionStats,
+    DataPoint,
+    TimeRange,
+    TimeSeriesQueryOptions,
+    TimeSeriesResult,
+    SeriesInfo,
+    DatabaseStats,
+    DatabaseError,
+    Aggregation,
+    SortOrder,
+)
+
+
+class KeyValueStore:
+    """Key-Value store operations."""
+
+    def __init__(self, client: "SynorDatabase"):
+        self._client = client
+
+    async def get(self, key: str) -> Optional[Any]:
+        """Get a value by key."""
+        response = await self._client._request("GET", f"/kv/{key}")
+        return response.get("value")
+
+    async def get_entry(self, key: str) -> Optional[KeyValueEntry]:
+        """Get a full entry with metadata."""
+        response = await self._client._request("GET", f"/kv/{key}/entry")
+        if response is None:
+            return None
+        return KeyValueEntry(
+            key=response["key"],
+            value=response["value"],
+            created_at=response["created_at"],
+            updated_at=response["updated_at"],
+            metadata=response.get("metadata"),
+            expires_at=response.get("expires_at"),
+        )
+
+    async def set(
+        self,
+        key: str,
+        value: Any,
+        ttl: Optional[int] = None,
+        metadata: Optional[Dict[str, str]] = None,
+        if_not_exists: bool = False,
+        if_exists: bool = False,
+    ) -> None:
+        """Set a value."""
+        body = {"value": value}
+        if ttl is not None:
+            body["ttl"] = ttl
+        if metadata is not None:
+            body["metadata"] = metadata
+        if if_not_exists:
+            body["if_not_exists"] = True
+        if if_exists:
+            body["if_exists"] = True
+
+        await self._client._request("PUT", f"/kv/{key}", body=body)
+
+    async def delete(self, key: str) -> bool:
+        """Delete a key."""
+        response = await self._client._request("DELETE", f"/kv/{key}")
+        return response.get("deleted", False)
+
+    async def exists(self, key: str) -> bool:
+        """Check if a key exists."""
+        response = await self._client._request("GET", f"/kv/{key}/exists")
+        return response.get("exists", False)
+
+    async def list(
+        self,
+        prefix: Optional[str] = None,
+        cursor: Optional[str] = None,
+        limit: int = 100,
+    ) -> ListResult:
+        """List keys with optional prefix filtering."""
+        params = {"limit": str(limit)}
+        if prefix:
+            params["prefix"] = prefix
+        if cursor:
+            params["cursor"] = cursor
+
+        response = await self._client._request("GET", f"/kv?{urlencode(params)}")
+        return ListResult(
+            entries=[
+                KeyValueEntry(
+                    key=e["key"],
+                    value=e["value"],
+                    created_at=e["created_at"],
+                    updated_at=e["updated_at"],
+                    metadata=e.get("metadata"),
+                    expires_at=e.get("expires_at"),
+                )
+                for e in response.get("entries", [])
+            ],
+            cursor=response.get("cursor"),
+            has_more=response.get("has_more", False),
+        )
+
+    async def mget(self, keys: List[str]) -> Dict[str, Optional[Any]]:
+        """Get multiple values at once."""
+        response = await self._client._request("POST", "/kv/mget", body={"keys": keys})
+        return {e["key"]: e["value"] for e in response.get("entries", [])}
+
+    async def mset(self, entries: Dict[str, Any]) -> None:
+        """Set multiple values at once."""
+        body = {"entries": [{"key": k, "value": v} for k, v in entries.items()]}
+        await self._client._request("POST", "/kv/mset", body=body)
+
+    async def incr(self, key: str, by: int = 1) -> int:
+        """Increment a numeric value."""
+        response = await self._client._request("POST", f"/kv/{key}/incr", body={"by": by})
+        return response["value"]
+
+
+class DocumentStore:
+    """Document store operations."""
+
+    def __init__(self, client: "SynorDatabase"):
+        self._client = client
+
+    async def create(
+        self,
+        collection: str,
+        data: Dict[str, Any],
+        id: Optional[str] = None,
+        metadata: Optional[Dict[str, str]] = None,
+    ) -> Document:
+        """Create a new document."""
+        body: Dict[str, Any] = {"data": data}
+        if id:
+            body["id"] = id
+        if metadata:
+            body["metadata"] = metadata
+
+        response = await self._client._request("POST", f"/documents/{collection}", body=body)
+        return self._parse_document(response)
+
+    async def get(self, collection: str, id: str) -> Optional[Document]:
+        """Get a document by ID."""
+        try:
+            response = await self._client._request("GET", f"/documents/{collection}/{id}")
+            return self._parse_document(response) if response else None
+        except DatabaseError as e:
+            if e.status_code == 404:
+                return None
+            raise
+
+    async def update(
+        self,
+        collection: str,
+        id: str,
+        update: Dict[str, Any],
+        upsert: bool = False,
+    ) -> Document:
+        """Update a document."""
+        body = {"update": update, "upsert": upsert}
+        response = await self._client._request("PATCH", f"/documents/{collection}/{id}", body=body)
+        return self._parse_document(response)
+
+    async def replace(self, collection: str, id: str, data: Dict[str, Any]) -> Document:
+        """Replace a document."""
+        response = await self._client._request("PUT", f"/documents/{collection}/{id}", body={"data": data})
+        return self._parse_document(response)
+
+    async def delete(self, collection: str, id: str) -> bool:
+        """Delete a document."""
+        response = await self._client._request("DELETE", f"/documents/{collection}/{id}")
+        return response.get("deleted", False)
+
+    async def query(
+        self,
+        collection: str,
+        filter: Optional[Dict[str, Any]] = None,
+        sort: Optional[Dict[str, str]] = None,
+        skip: int = 0,
+        limit: int = 100,
+        projection: Optional[List[str]] = None,
+    ) -> QueryResult:
+        """Query documents."""
+        body: Dict[str, Any] = {"skip": skip, "limit": limit}
+        if filter:
+            body["filter"] = filter
+        if sort:
+            body["sort"] = sort
+        if projection:
+            body["projection"] = projection
+
+        response = await self._client._request("POST", f"/documents/{collection}/query", body=body)
+        return QueryResult(
+            documents=[self._parse_document(d) for d in response.get("documents", [])],
+            total=response.get("total", 0),
+            has_more=response.get("has_more", False),
+        )
+
+    async def count(self, collection: str, filter: Optional[Dict[str, Any]] = None) -> int:
+        """Count documents matching a filter."""
+        body = {"filter": filter} if filter else {}
+        response = await self._client._request("POST", f"/documents/{collection}/count", body=body)
+        return response.get("count", 0)
+
+    async def aggregate(
+        self,
+        collection: str,
+        pipeline: List[Dict[str, Any]],
+    ) -> List[Any]:
+        """Run an aggregation pipeline."""
+        response = await self._client._request(
+            "POST", f"/documents/{collection}/aggregate", body={"pipeline": pipeline}
+        )
+        return response.get("results", [])
+
+    def _parse_document(self, data: Dict[str, Any]) -> Document:
+        return Document(
+            id=data["id"],
+            data=data["data"],
+            created_at=data["created_at"],
+            updated_at=data["updated_at"],
+            version=data["version"],
+            metadata=data.get("metadata"),
+        )
+
+
+class VectorStore:
+    """Vector store operations."""
+
+    def __init__(self, client: "SynorDatabase"):
+        self._client = client
+
+    async def create_collection(
+        self,
+        name: str,
+        dimension: int,
+        metric: str = "cosine",
+        index_type: str = "hnsw",
+    ) -> None:
+        """Create a vector collection."""
+        await self._client._request(
+            "POST",
+            "/vectors/collections",
+            body={"name": name, "dimension": dimension, "metric": metric, "index_type": index_type},
+        )
+
+    async def delete_collection(self, name: str) -> None:
+        """Delete a vector collection."""
+        await self._client._request("DELETE", f"/vectors/collections/{name}")
+
+    async def get_collection_stats(self, name: str) -> VectorCollectionStats:
+        """Get collection statistics."""
+        response = await self._client._request("GET", f"/vectors/collections/{name}/stats")
+        return VectorCollectionStats(
+            name=response["name"],
+            vector_count=response["vector_count"],
+            dimension=response["dimension"],
+            index_size=response["index_size"],
+        )
+
+    async def upsert(
+        self,
+        collection: str,
+        vectors: List[Dict[str, Any]],
+        namespace: Optional[str] = None,
+    ) -> int:
+        """Upsert vectors."""
+        body: Dict[str, Any] = {"vectors": vectors}
+        if namespace:
+            body["namespace"] = namespace
+
+        response = await self._client._request("POST", f"/vectors/{collection}/upsert", body=body)
+        return response.get("upserted", 0)
+
+    async def search(
+        self,
+        collection: str,
+        vector: List[float],
+        top_k: int = 10,
+        namespace: Optional[str] = None,
+        filter: Optional[Dict[str, Any]] = None,
+        include_metadata: bool = True,
+        include_vectors: bool = False,
+        min_score: Optional[float] = None,
+    ) -> List[SearchResult]:
+        """Search for similar vectors."""
+        body: Dict[str, Any] = {
+            "vector": vector,
+            "top_k": top_k,
+            "include_metadata": include_metadata,
+            "include_vectors": include_vectors,
+        }
+        if namespace:
+            body["namespace"] = namespace
+        if filter:
+            body["filter"] = filter
+        if min_score is not None:
+            body["min_score"] = min_score
+
+        response = await self._client._request("POST", f"/vectors/{collection}/search", body=body)
+        return [
+            SearchResult(
+                id=r["id"],
+                score=r["score"],
+                vector=r.get("vector"),
+                metadata=r.get("metadata"),
+                content=r.get("content"),
+            )
+            for r in response.get("results", [])
+        ]
+
+    async def search_text(
+        self,
+        collection: str,
+        text: str,
+        top_k: int = 10,
+        **kwargs,
+    ) -> List[SearchResult]:
+        """Search using text (requires embedding generation)."""
+        body = {"text": text, "top_k": top_k, **kwargs}
+        response = await self._client._request("POST", f"/vectors/{collection}/search/text", body=body)
+        return [
+            SearchResult(
+                id=r["id"],
+                score=r["score"],
+                vector=r.get("vector"),
+                metadata=r.get("metadata"),
+                content=r.get("content"),
+            )
+            for r in response.get("results", [])
+        ]
+
+    async def delete(
+        self,
+        collection: str,
+        ids: List[str],
+        namespace: Optional[str] = None,
+    ) -> int:
+        """Delete vectors by ID."""
+        body: Dict[str, Any] = {"ids": ids}
+        if namespace:
+            body["namespace"] = namespace
+
+        response = await self._client._request("POST", f"/vectors/{collection}/delete", body=body)
+        return response.get("deleted", 0)
+
+    async def fetch(
+        self,
+        collection: str,
+        ids: List[str],
+        namespace: Optional[str] = None,
+    ) -> List[VectorEntry]:
+        """Fetch vectors by ID."""
+        body: Dict[str, Any] = {"ids": ids}
+        if namespace:
+            body["namespace"] = namespace
+
+        response = await self._client._request("POST", f"/vectors/{collection}/fetch", body=body)
+        return [
+            VectorEntry(
+                id=v["id"],
+                vector=v["vector"],
+                metadata=v.get("metadata"),
+                content=v.get("content"),
+            )
+            for v in response.get("vectors", [])
+        ]
+
+
+class TimeSeriesStore:
+    """Time series store operations."""
+
+    def __init__(self, client: "SynorDatabase"):
+        self._client = client
+
+    async def write(
+        self,
+        series: str,
+        points: List[Dict[str, Any]],
+        precision: str = "ms",
+    ) -> int:
+        """Write data points to a series."""
+        body = {"points": points, "precision": precision}
+        response = await self._client._request("POST", f"/timeseries/{series}/write", body=body)
+        return response.get("written", 0)
+
+    async def query(
+        self,
+        series: str,
+        start: Union[int, datetime, str],
+        end: Union[int, datetime, str],
+        tags: Optional[Dict[str, str]] = None,
+        aggregation: Optional[str] = None,
+        interval: Optional[str] = None,
+        fill: Optional[Union[str, float]] = None,
+        limit: Optional[int] = None,
+    ) -> TimeSeriesResult:
+        """Query a time series."""
+        body: Dict[str, Any] = {
+            "range": {
+                "start": self._format_time(start),
+                "end": self._format_time(end),
+            }
+        }
+        if tags:
+            body["tags"] = tags
+        if aggregation:
+            body["aggregation"] = aggregation
+        if interval:
+            body["interval"] = interval
+        if fill is not None:
+            body["fill"] = fill
+        if limit:
+            body["limit"] = limit
+
+        response = await self._client._request("POST", f"/timeseries/{series}/query", body=body)
+        return TimeSeriesResult(
+            series=response["series"],
+            points=[
+                DataPoint(
+                    timestamp=p["timestamp"],
+                    value=p["value"],
+                    tags=p.get("tags"),
+                )
+                for p in response.get("points", [])
+            ],
+            statistics=response.get("statistics"),
+        )
+
+    async def delete(
+        self,
+        series: str,
+        start: Union[int, datetime, str],
+        end: Union[int, datetime, str],
+        tags: Optional[Dict[str, str]] = None,
+    ) -> int:
+        """Delete data points in a range."""
+        body: Dict[str, Any] = {
+            "range": {
+                "start": self._format_time(start),
+                "end": self._format_time(end),
+            }
+        }
+        if tags:
+            body["tags"] = tags
+
+        response = await self._client._request("POST", f"/timeseries/{series}/delete", body=body)
+        return response.get("deleted", 0)
+
+    async def get_series_info(self, series: str) -> SeriesInfo:
+        """Get series information."""
+        response = await self._client._request("GET", f"/timeseries/{series}/info")
+        return SeriesInfo(
+            name=response["name"],
+            tags=response.get("tags", []),
+            retention_days=response.get("retention_days", 0),
+            point_count=response.get("point_count", 0),
+        )
+
+    async def list_series(self, prefix: Optional[str] = None) -> List[SeriesInfo]:
+        """List all series."""
+        params = f"?prefix={prefix}" if prefix else ""
+        response = await self._client._request("GET", f"/timeseries{params}")
+        return [
+            SeriesInfo(
+                name=s["name"],
+                tags=s.get("tags", []),
+                retention_days=s.get("retention_days", 0),
+                point_count=s.get("point_count", 0),
+            )
+            for s in response.get("series", [])
+        ]
+
+    async def set_retention(self, series: str, retention_days: int) -> None:
+        """Set retention policy for a series."""
+        await self._client._request(
+            "PUT", f"/timeseries/{series}/retention", body={"retention_days": retention_days}
+        )
+
+    def _format_time(self, t: Union[int, datetime, str]) -> Union[int, str]:
+        if isinstance(t, datetime):
+            return int(t.timestamp() * 1000)
+        return t
+
+
+class SynorDatabase:
+    """
+    Synor Database SDK Client.
+
+    Multi-model database supporting Key-Value, Document, Vector, and Time Series data.
+    """
+
+    def __init__(
+        self,
+        api_key: str,
+        endpoint: str = "https://database.synor.io/v1",
+        network: Network = Network.MAINNET,
+        timeout: float = 30.0,
+        retries: int = 3,
+        debug: bool = False,
+    ):
+        self._config = DatabaseConfig(
+            api_key=api_key,
+            endpoint=endpoint,
+            network=network,
+            timeout=timeout,
+            retries=retries,
+            debug=debug,
+        )
+        self._client = httpx.AsyncClient(
+            base_url=endpoint,
+            timeout=timeout,
+            headers={
+                "Authorization": f"Bearer {api_key}",
+                "Content-Type": "application/json",
+                "X-SDK-Version": "python/0.1.0",
+            },
+        )
+        self._closed = False
+
+        # Initialize stores
+        self.kv = KeyValueStore(self)
+        self.documents = DocumentStore(self)
+        self.vectors = VectorStore(self)
+        self.timeseries = TimeSeriesStore(self)
+
+    async def get_stats(self) -> DatabaseStats:
+        """Get database statistics."""
+        response = await self._request("GET", "/stats")
+        return DatabaseStats(
+            kv_entries=response.get("kv_entries", 0),
+            document_count=response.get("document_count", 0),
+            vector_count=response.get("vector_count", 0),
+            timeseries_points=response.get("timeseries_points", 0),
+            storage_used=response.get("storage_used", 0),
+            storage_limit=response.get("storage_limit", 0),
+        )
+
+    async def health_check(self) -> bool:
+        """Health check."""
+        try:
+            response = await self._request("GET", "/health")
+            return response.get("status") == "healthy"
+        except Exception:
+            return False
+
+    async def close(self) -> None:
+        """Close the client."""
+        if not self._closed:
+            await self._client.aclose()
+            self._closed = True
+
+    @property
+    def is_closed(self) -> bool:
+        """Check if the client is closed."""
+        return self._closed
+
+    async def __aenter__(self) -> "SynorDatabase":
+        return self
+
+    async def __aexit__(self, exc_type, exc_val, exc_tb) -> None:
+        await self.close()
+
+    async def _request(
+        self,
+        method: str,
+        path: str,
+        body: Optional[Dict[str, Any]] = None,
+    ) -> Dict[str, Any]:
+        """Make an HTTP request with retry logic."""
+        if self._closed:
+            raise DatabaseError("Client has been closed")
+
+        last_error: Optional[Exception] = None
+
+        for attempt in range(self._config.retries):
+            try:
+                if method == "GET":
+                    response = await self._client.get(path)
+                elif method == "POST":
+                    response = await self._client.post(path, json=body)
+                elif method == "PUT":
+                    response = await self._client.put(path, json=body)
+                elif method == "PATCH":
+                    response = await self._client.patch(path, json=body)
+                elif method == "DELETE":
+                    response = await self._client.delete(path)
+                else:
+                    raise ValueError(f"Unknown method: {method}")
+
+                if response.status_code >= 400:
+                    error_data = response.json() if response.content else {}
+                    raise DatabaseError(
+                        error_data.get("message") or error_data.get("error") or f"HTTP {response.status_code}",
+                        error_data.get("code"),
+                        response.status_code,
+                    )
+
+                return response.json() if response.content else {}
+
+            except Exception as e:
+                last_error = e
+                if self._config.debug:
+                    print(f"Attempt {attempt + 1} failed: {e}")
+
+                if attempt < self._config.retries - 1:
+                    import asyncio
+                    await asyncio.sleep(attempt + 1)
+
+        if last_error:
+            raise last_error
+        raise DatabaseError("Unknown error after retries")

sdk/python/src/synor_database/types.py

@@ -0,0 +1,253 @@
+"""
+Synor Database SDK Types
+"""
+
+from dataclasses import dataclass, field
+from enum import Enum
+from typing import Any, Dict, List, Optional, Union
+from datetime import datetime
+
+
+class Network(str, Enum):
+    """Network environment."""
+    MAINNET = "mainnet"
+    TESTNET = "testnet"
+    DEVNET = "devnet"
+
+
+class DistanceMetric(str, Enum):
+    """Vector distance metric."""
+    COSINE = "cosine"
+    EUCLIDEAN = "euclidean"
+    DOT_PRODUCT = "dotProduct"
+
+
+class Aggregation(str, Enum):
+    """Time series aggregation function."""
+    MEAN = "mean"
+    SUM = "sum"
+    COUNT = "count"
+    MIN = "min"
+    MAX = "max"
+    FIRST = "first"
+    LAST = "last"
+    STDDEV = "stddev"
+    VARIANCE = "variance"
+
+
+class SortOrder(str, Enum):
+    """Sort order."""
+    ASC = "asc"
+    DESC = "desc"
+
+
+@dataclass
+class DatabaseConfig:
+    """Database configuration."""
+    api_key: str
+    endpoint: str = "https://database.synor.io/v1"
+    network: Network = Network.MAINNET
+    timeout: float = 30.0
+    retries: int = 3
+    debug: bool = False
+
+
+# ==================== Key-Value Types ====================
+
+@dataclass
+class KeyValueEntry:
+    """Key-value entry with metadata."""
+    key: str
+    value: Any
+    created_at: int
+    updated_at: int
+    metadata: Optional[Dict[str, str]] = None
+    expires_at: Optional[int] = None
+
+
+@dataclass
+class SetOptions:
+    """Options for setting a key-value pair."""
+    ttl: Optional[int] = None  # Time-to-live in seconds
+    metadata: Optional[Dict[str, str]] = None
+    if_not_exists: bool = False
+    if_exists: bool = False
+
+
+@dataclass
+class ListOptions:
+    """Options for listing keys."""
+    prefix: Optional[str] = None
+    cursor: Optional[str] = None
+    limit: int = 100
+
+
+@dataclass
+class ListResult:
+    """Result of listing keys."""
+    entries: List[KeyValueEntry]
+    cursor: Optional[str] = None
+    has_more: bool = False
+
+
+# ==================== Document Store Types ====================
+
+@dataclass
+class Document:
+    """A document with metadata."""
+    id: str
+    data: Dict[str, Any]
+    created_at: int
+    updated_at: int
+    version: int
+    metadata: Optional[Dict[str, str]] = None
+
+
+@dataclass
+class QueryOptions:
+    """Query options for document store."""
+    filter: Optional[Dict[str, Any]] = None
+    sort: Optional[Dict[str, SortOrder]] = None
+    skip: int = 0
+    limit: int = 100
+    projection: Optional[List[str]] = None
+
+
+@dataclass
+class QueryResult:
+    """Result of a document query."""
+    documents: List[Document]
+    total: int
+    has_more: bool
+
+
+# ==================== Vector Store Types ====================
+
+@dataclass
+class VectorEntry:
+    """A vector entry."""
+    id: str
+    vector: List[float]
+    metadata: Optional[Dict[str, Any]] = None
+    content: Optional[str] = None
+
+
+@dataclass
+class SearchOptions:
+    """Options for vector search."""
+    namespace: Optional[str] = None
+    top_k: int = 10
+    filter: Optional[Dict[str, Any]] = None
+    include_metadata: bool = True
+    include_vectors: bool = False
+    min_score: Optional[float] = None
+
+
+@dataclass
+class SearchResult:
+    """Result of a vector search."""
+    id: str
+    score: float
+    vector: Optional[List[float]] = None
+    metadata: Optional[Dict[str, Any]] = None
+    content: Optional[str] = None
+
+
+@dataclass
+class VectorCollectionConfig:
+    """Configuration for a vector collection."""
+    name: str
+    dimension: int
+    metric: DistanceMetric = DistanceMetric.COSINE
+    index_type: str = "hnsw"
+
+
+@dataclass
+class VectorCollectionStats:
+    """Statistics for a vector collection."""
+    name: str
+    vector_count: int
+    dimension: int
+    index_size: int
+
+
+# ==================== Time Series Types ====================
+
+@dataclass
+class DataPoint:
+    """A time series data point."""
+    timestamp: int
+    value: float
+    tags: Optional[Dict[str, str]] = None
+
+
+@dataclass
+class TimeRange:
+    """Time range for queries."""
+    start: Union[int, datetime, str]
+    end: Union[int, datetime, str]
+
+
+@dataclass
+class TimeSeriesQueryOptions:
+    """Options for time series queries."""
+    tags: Optional[Dict[str, str]] = None
+    aggregation: Optional[Aggregation] = None
+    interval: Optional[str] = None  # e.g., "1m", "5m", "1h"
+    fill: Optional[Union[str, float]] = None
+    limit: Optional[int] = None
+
+
+@dataclass
+class TimeSeriesResult:
+    """Result of a time series query."""
+    series: str
+    points: List[DataPoint]
+    statistics: Optional[Dict[str, float]] = None
+
+
+@dataclass
+class SeriesInfo:
+    """Information about a time series."""
+    name: str
+    tags: List[str]
+    retention_days: int
+    point_count: int
+
+
+# ==================== Database Stats ====================
+
+@dataclass
+class DatabaseStats:
+    """Overall database statistics."""
+    kv_entries: int
+    document_count: int
+    vector_count: int
+    timeseries_points: int
+    storage_used: int
+    storage_limit: int
+
+
+# ==================== Errors ====================
+
+class DatabaseError(Exception):
+    """Base exception for database errors."""
+
+    def __init__(self, message: str, code: Optional[str] = None, status_code: Optional[int] = None):
+        super().__init__(message)
+        self.code = code
+        self.status_code = status_code
+
+
+class DocumentNotFoundError(DatabaseError):
+    """Raised when a document is not found."""
+
+    def __init__(self, collection: str, id: str):
+        super().__init__(f"Document not found: {collection}/{id}", "DOCUMENT_NOT_FOUND", 404)
+
+
+class KeyNotFoundError(DatabaseError):
+    """Raised when a key is not found."""
+
+    def __init__(self, key: str):
+        super().__init__(f"Key not found: {key}", "KEY_NOT_FOUND", 404)

sdk/python/src/synor_hosting/__init__.py

@@ -0,0 +1,54 @@
+"""
+Synor Hosting SDK for Python
+
+Decentralized web hosting with domain management, DNS, and deployments.
+
+Example:
+    >>> from synor_hosting import SynorHosting
+    >>>
+    >>> hosting = SynorHosting(api_key="your-api-key")
+    >>>
+    >>> # Register a domain
+    >>> domain = await hosting.register_domain("mysite.synor")
+    >>> print(f"Domain registered: {domain.name}")
+    >>>
+    >>> # Deploy from CID
+    >>> deployment = await hosting.deploy("Qm...", domain="mysite.synor")
+    >>> print(f"Live at: {deployment.url}")
+    >>>
+    >>> # Provision SSL
+    >>> cert = await hosting.provision_ssl("mysite.synor")
+"""
+
+from .types import (
+    HostingConfig,
+    Domain,
+    DomainRecord,
+    DomainAvailability,
+    DnsRecord,
+    DnsZone,
+    Deployment,
+    DeploymentStats,
+    Certificate,
+    SiteConfig,
+    AnalyticsData,
+    HostingError,
+)
+from .client import SynorHosting
+
+__version__ = "0.1.0"
+__all__ = [
+    "SynorHosting",
+    "HostingConfig",
+    "Domain",
+    "DomainRecord",
+    "DomainAvailability",
+    "DnsRecord",
+    "DnsZone",
+    "Deployment",
+    "DeploymentStats",
+    "Certificate",
+    "SiteConfig",
+    "AnalyticsData",
+    "HostingError",
+]

sdk/python/src/synor_hosting/client.py

@@ -0,0 +1,487 @@
+"""
+Synor Hosting SDK Client
+"""
+
+from typing import Any, Dict, List, Optional
+from urllib.parse import urlencode
+import httpx
+
+from .types import (
+    HostingConfig,
+    Network,
+    Domain,
+    DomainRecord,
+    DomainStatus,
+    DomainAvailability,
+    DnsRecord,
+    DnsRecordType,
+    DnsZone,
+    Deployment,
+    DeploymentStatus,
+    DeploymentStats,
+    RedirectRule,
+    Certificate,
+    CertificateStatus,
+    SiteConfig,
+    AnalyticsData,
+    PageView,
+    Referrer,
+    Country,
+    HostingError,
+)
+
+
+class SynorHosting:
+    """
+    Synor Hosting SDK Client.
+
+    Provides domain registration, DNS management, site deployment, and SSL provisioning.
+    """
+
+    def __init__(
+        self,
+        api_key: str,
+        endpoint: str = "https://hosting.synor.io/v1",
+        network: Network = Network.MAINNET,
+        timeout: float = 60.0,
+        retries: int = 3,
+        debug: bool = False,
+    ):
+        self._config = HostingConfig(
+            api_key=api_key,
+            endpoint=endpoint,
+            network=network,
+            timeout=timeout,
+            retries=retries,
+            debug=debug,
+        )
+        self._client = httpx.AsyncClient(
+            base_url=endpoint,
+            timeout=timeout,
+            headers={
+                "Authorization": f"Bearer {api_key}",
+                "Content-Type": "application/json",
+                "X-SDK-Version": "python/0.1.0",
+            },
+        )
+        self._closed = False
+
+    # ==================== Domain Operations ====================
+
+    async def check_availability(self, name: str) -> DomainAvailability:
+        """Check domain availability."""
+        response = await self._request("GET", f"/domains/check/{name}")
+        return DomainAvailability(
+            name=response["name"],
+            available=response["available"],
+            price=response.get("price"),
+            premium=response.get("premium", False),
+        )
+
+    async def register_domain(
+        self,
+        name: str,
+        years: int = 1,
+        auto_renew: bool = True,
+        records: Optional[DomainRecord] = None,
+    ) -> Domain:
+        """Register a new domain."""
+        body: Dict[str, Any] = {"name": name, "years": years, "auto_renew": auto_renew}
+        if records:
+            body["records"] = self._domain_record_to_dict(records)
+
+        response = await self._request("POST", "/domains", body=body)
+        return self._parse_domain(response)
+
+    async def get_domain(self, name: str) -> Domain:
+        """Get domain information."""
+        response = await self._request("GET", f"/domains/{name}")
+        return self._parse_domain(response)
+
+    async def list_domains(self) -> List[Domain]:
+        """List all domains."""
+        response = await self._request("GET", "/domains")
+        return [self._parse_domain(d) for d in response.get("domains", [])]
+
+    async def update_domain_record(self, name: str, record: DomainRecord) -> Domain:
+        """Update domain record."""
+        response = await self._request(
+            "PUT", f"/domains/{name}/record", body=self._domain_record_to_dict(record)
+        )
+        return self._parse_domain(response)
+
+    async def resolve_domain(self, name: str) -> DomainRecord:
+        """Resolve a domain to its record."""
+        response = await self._request("GET", f"/domains/{name}/resolve")
+        return self._parse_domain_record(response)
+
+    async def renew_domain(self, name: str, years: int = 1) -> Domain:
+        """Renew a domain."""
+        response = await self._request("POST", f"/domains/{name}/renew", body={"years": years})
+        return self._parse_domain(response)
+
+    async def transfer_domain(self, name: str, new_owner: str) -> Domain:
+        """Transfer domain ownership."""
+        response = await self._request("POST", f"/domains/{name}/transfer", body={"new_owner": new_owner})
+        return self._parse_domain(response)
+
+    # ==================== DNS Operations ====================
+
+    async def get_dns_zone(self, domain: str) -> DnsZone:
+        """Get DNS zone for a domain."""
+        response = await self._request("GET", f"/dns/{domain}")
+        return DnsZone(
+            domain=response["domain"],
+            records=[self._parse_dns_record(r) for r in response.get("records", [])],
+            updated_at=response["updated_at"],
+        )
+
+    async def set_dns_records(self, domain: str, records: List[DnsRecord]) -> DnsZone:
+        """Set DNS records for a domain."""
+        body = {"records": [self._dns_record_to_dict(r) for r in records]}
+        response = await self._request("PUT", f"/dns/{domain}", body=body)
+        return DnsZone(
+            domain=response["domain"],
+            records=[self._parse_dns_record(r) for r in response.get("records", [])],
+            updated_at=response["updated_at"],
+        )
+
+    async def add_dns_record(self, domain: str, record: DnsRecord) -> DnsZone:
+        """Add a DNS record."""
+        body = self._dns_record_to_dict(record)
+        response = await self._request("POST", f"/dns/{domain}/records", body=body)
+        return DnsZone(
+            domain=response["domain"],
+            records=[self._parse_dns_record(r) for r in response.get("records", [])],
+            updated_at=response["updated_at"],
+        )
+
+    async def delete_dns_record(self, domain: str, record_type: str, name: str) -> DnsZone:
+        """Delete a DNS record."""
+        response = await self._request("DELETE", f"/dns/{domain}/records/{record_type}/{name}")
+        return DnsZone(
+            domain=response["domain"],
+            records=[self._parse_dns_record(r) for r in response.get("records", [])],
+            updated_at=response["updated_at"],
+        )
+
+    # ==================== Deployment Operations ====================
+
+    async def deploy(
+        self,
+        cid: str,
+        domain: Optional[str] = None,
+        subdomain: Optional[str] = None,
+        headers: Optional[Dict[str, str]] = None,
+        redirects: Optional[List[RedirectRule]] = None,
+        spa: bool = False,
+        clean_urls: bool = True,
+        trailing_slash: bool = False,
+    ) -> Deployment:
+        """Deploy a site from CID."""
+        body: Dict[str, Any] = {"cid": cid}
+        if domain:
+            body["domain"] = domain
+        if subdomain:
+            body["subdomain"] = subdomain
+        if headers:
+            body["headers"] = headers
+        if redirects:
+            body["redirects"] = [
+                {"source": r.source, "destination": r.destination, "status_code": r.status_code}
+                for r in redirects
+            ]
+        body["spa"] = spa
+        body["clean_urls"] = clean_urls
+        body["trailing_slash"] = trailing_slash
+
+        response = await self._request("POST", "/deployments", body=body)
+        return self._parse_deployment(response)
+
+    async def get_deployment(self, deployment_id: str) -> Deployment:
+        """Get deployment by ID."""
+        response = await self._request("GET", f"/deployments/{deployment_id}")
+        return self._parse_deployment(response)
+
+    async def list_deployments(self, domain: Optional[str] = None) -> List[Deployment]:
+        """List deployments."""
+        path = f"/deployments?domain={domain}" if domain else "/deployments"
+        response = await self._request("GET", path)
+        return [self._parse_deployment(d) for d in response.get("deployments", [])]
+
+    async def rollback(self, domain: str, deployment_id: str) -> Deployment:
+        """Rollback to a previous deployment."""
+        response = await self._request(
+            "POST", f"/deployments/{deployment_id}/rollback", body={"domain": domain}
+        )
+        return self._parse_deployment(response)
+
+    async def delete_deployment(self, deployment_id: str) -> None:
+        """Delete a deployment."""
+        await self._request("DELETE", f"/deployments/{deployment_id}")
+
+    async def get_deployment_stats(self, deployment_id: str, period: str = "24h") -> DeploymentStats:
+        """Get deployment stats."""
+        response = await self._request("GET", f"/deployments/{deployment_id}/stats?period={period}")
+        return DeploymentStats(
+            requests=response["requests"],
+            bandwidth=response["bandwidth"],
+            unique_visitors=response["unique_visitors"],
+            period=response["period"],
+        )
+
+    # ==================== SSL Operations ====================
+
+    async def provision_ssl(
+        self,
+        domain: str,
+        include_www: bool = True,
+        auto_renew: bool = True,
+    ) -> Certificate:
+        """Provision SSL certificate."""
+        body = {"include_www": include_www, "auto_renew": auto_renew}
+        response = await self._request("POST", f"/ssl/{domain}", body=body)
+        return self._parse_certificate(response)
+
+    async def get_certificate(self, domain: str) -> Certificate:
+        """Get certificate status."""
+        response = await self._request("GET", f"/ssl/{domain}")
+        return self._parse_certificate(response)
+
+    async def renew_certificate(self, domain: str) -> Certificate:
+        """Renew SSL certificate."""
+        response = await self._request("POST", f"/ssl/{domain}/renew")
+        return self._parse_certificate(response)
+
+    async def delete_certificate(self, domain: str) -> None:
+        """Delete/revoke SSL certificate."""
+        await self._request("DELETE", f"/ssl/{domain}")
+
+    # ==================== Site Configuration ====================
+
+    async def get_site_config(self, domain: str) -> SiteConfig:
+        """Get site configuration."""
+        response = await self._request("GET", f"/sites/{domain}/config")
+        return self._parse_site_config(response)
+
+    async def update_site_config(self, domain: str, **kwargs) -> SiteConfig:
+        """Update site configuration."""
+        response = await self._request("PATCH", f"/sites/{domain}/config", body=kwargs)
+        return self._parse_site_config(response)
+
+    async def purge_cache(self, domain: str, paths: Optional[List[str]] = None) -> int:
+        """Purge CDN cache."""
+        body = {"paths": paths} if paths else None
+        response = await self._request("DELETE", f"/sites/{domain}/cache", body=body)
+        return response.get("purged", 0)
+
+    # ==================== Analytics ====================
+
+    async def get_analytics(
+        self,
+        domain: str,
+        period: str = "24h",
+        start_date: Optional[str] = None,
+        end_date: Optional[str] = None,
+    ) -> AnalyticsData:
+        """Get site analytics."""
+        params = {"period": period}
+        if start_date:
+            params["start"] = start_date
+        if end_date:
+            params["end"] = end_date
+
+        response = await self._request("GET", f"/sites/{domain}/analytics?{urlencode(params)}")
+        return AnalyticsData(
+            domain=response["domain"],
+            period=response["period"],
+            page_views=response["page_views"],
+            unique_visitors=response["unique_visitors"],
+            bandwidth=response["bandwidth"],
+            top_pages=[PageView(path=p["path"], views=p["views"]) for p in response.get("top_pages", [])],
+            top_referrers=[Referrer(referrer=r["referrer"], count=r["count"]) for r in response.get("top_referrers", [])],
+            top_countries=[Country(country=c["country"], count=c["count"]) for c in response.get("top_countries", [])],
+        )
+
+    # ==================== Lifecycle ====================
+
+    async def close(self) -> None:
+        """Close the client."""
+        if not self._closed:
+            await self._client.aclose()
+            self._closed = True
+
+    @property
+    def is_closed(self) -> bool:
+        """Check if the client is closed."""
+        return self._closed
+
+    async def __aenter__(self) -> "SynorHosting":
+        return self
+
+    async def __aexit__(self, exc_type, exc_val, exc_tb) -> None:
+        await self.close()
+
+    # ==================== Internal Methods ====================
+
+    async def _request(
+        self,
+        method: str,
+        path: str,
+        body: Optional[Dict[str, Any]] = None,
+    ) -> Dict[str, Any]:
+        """Make an HTTP request with retry logic."""
+        if self._closed:
+            raise HostingError("Client has been closed")
+
+        last_error: Optional[Exception] = None
+
+        for attempt in range(self._config.retries):
+            try:
+                if method == "GET":
+                    response = await self._client.get(path)
+                elif method == "POST":
+                    response = await self._client.post(path, json=body)
+                elif method == "PUT":
+                    response = await self._client.put(path, json=body)
+                elif method == "PATCH":
+                    response = await self._client.patch(path, json=body)
+                elif method == "DELETE":
+                    if body:
+                        response = await self._client.request("DELETE", path, json=body)
+                    else:
+                        response = await self._client.delete(path)
+                else:
+                    raise ValueError(f"Unknown method: {method}")
+
+                if response.status_code >= 400:
+                    error_data = response.json() if response.content else {}
+                    raise HostingError(
+                        error_data.get("message") or error_data.get("error") or f"HTTP {response.status_code}",
+                        error_data.get("code"),
+                        response.status_code,
+                    )
+
+                return response.json() if response.content else {}
+
+            except Exception as e:
+                last_error = e
+                if self._config.debug:
+                    print(f"Attempt {attempt + 1} failed: {e}")
+
+                if attempt < self._config.retries - 1:
+                    import asyncio
+                    await asyncio.sleep(attempt + 1)
+
+        if last_error:
+            raise last_error
+        raise HostingError("Unknown error after retries")
+
+    def _parse_domain(self, data: Dict[str, Any]) -> Domain:
+        records = None
+        if "records" in data and data["records"]:
+            records = self._parse_domain_record(data["records"])
+
+        return Domain(
+            name=data["name"],
+            status=DomainStatus(data["status"]),
+            owner=data["owner"],
+            registered_at=data["registered_at"],
+            expires_at=data["expires_at"],
+            auto_renew=data.get("auto_renew", True),
+            records=records,
+        )
+
+    def _parse_domain_record(self, data: Dict[str, Any]) -> DomainRecord:
+        return DomainRecord(
+            cid=data.get("cid"),
+            ipv4=data.get("ipv4"),
+            ipv6=data.get("ipv6"),
+            cname=data.get("cname"),
+            txt=data.get("txt"),
+            metadata=data.get("metadata"),
+        )
+
+    def _domain_record_to_dict(self, record: DomainRecord) -> Dict[str, Any]:
+        result: Dict[str, Any] = {}
+        if record.cid:
+            result["cid"] = record.cid
+        if record.ipv4:
+            result["ipv4"] = record.ipv4
+        if record.ipv6:
+            result["ipv6"] = record.ipv6
+        if record.cname:
+            result["cname"] = record.cname
+        if record.txt:
+            result["txt"] = record.txt
+        if record.metadata:
+            result["metadata"] = record.metadata
+        return result
+
+    def _parse_dns_record(self, data: Dict[str, Any]) -> DnsRecord:
+        return DnsRecord(
+            type=DnsRecordType(data["type"]),
+            name=data["name"],
+            value=data["value"],
+            ttl=data.get("ttl", 3600),
+            priority=data.get("priority"),
+        )
+
+    def _dns_record_to_dict(self, record: DnsRecord) -> Dict[str, Any]:
+        result = {
+            "type": record.type.value,
+            "name": record.name,
+            "value": record.value,
+            "ttl": record.ttl,
+        }
+        if record.priority is not None:
+            result["priority"] = record.priority
+        return result
+
+    def _parse_deployment(self, data: Dict[str, Any]) -> Deployment:
+        return Deployment(
+            id=data["id"],
+            domain=data["domain"],
+            cid=data["cid"],
+            status=DeploymentStatus(data["status"]),
+            url=data["url"],
+            created_at=data["created_at"],
+            updated_at=data["updated_at"],
+            build_logs=data.get("build_logs"),
+            error_message=data.get("error_message"),
+        )
+
+    def _parse_certificate(self, data: Dict[str, Any]) -> Certificate:
+        return Certificate(
+            domain=data["domain"],
+            status=CertificateStatus(data["status"]),
+            auto_renew=data.get("auto_renew", True),
+            issuer=data.get("issuer", ""),
+            issued_at=data.get("issued_at"),
+            expires_at=data.get("expires_at"),
+            fingerprint=data.get("fingerprint"),
+        )
+
+    def _parse_site_config(self, data: Dict[str, Any]) -> SiteConfig:
+        redirects = None
+        if "redirects" in data and data["redirects"]:
+            redirects = [
+                RedirectRule(
+                    source=r["source"],
+                    destination=r["destination"],
+                    status_code=r.get("status_code", 301),
+                    permanent=r.get("permanent", True),
+                )
+                for r in data["redirects"]
+            ]
+
+        return SiteConfig(
+            domain=data["domain"],
+            cid=data.get("cid"),
+            headers=data.get("headers"),
+            redirects=redirects,
+            error_pages=data.get("error_pages"),
+            spa=data.get("spa", False),
+            clean_urls=data.get("clean_urls", True),
+            trailing_slash=data.get("trailing_slash", False),
+        )

sdk/python/src/synor_hosting/types.py

@@ -0,0 +1,241 @@
+"""
+Synor Hosting SDK Types
+"""
+
+from dataclasses import dataclass, field
+from enum import Enum
+from typing import Any, Dict, List, Optional
+
+
+class Network(str, Enum):
+    """Network environment."""
+    MAINNET = "mainnet"
+    TESTNET = "testnet"
+    DEVNET = "devnet"
+
+
+class DomainStatus(str, Enum):
+    """Domain status."""
+    PENDING = "pending"
+    ACTIVE = "active"
+    EXPIRED = "expired"
+    SUSPENDED = "suspended"
+
+
+class DeploymentStatus(str, Enum):
+    """Deployment status."""
+    PENDING = "pending"
+    BUILDING = "building"
+    DEPLOYING = "deploying"
+    ACTIVE = "active"
+    FAILED = "failed"
+    INACTIVE = "inactive"
+
+
+class CertificateStatus(str, Enum):
+    """Certificate status."""
+    PENDING = "pending"
+    ISSUED = "issued"
+    EXPIRED = "expired"
+    REVOKED = "revoked"
+
+
+class DnsRecordType(str, Enum):
+    """DNS record type."""
+    A = "A"
+    AAAA = "AAAA"
+    CNAME = "CNAME"
+    TXT = "TXT"
+    MX = "MX"
+    NS = "NS"
+    SRV = "SRV"
+    CAA = "CAA"
+
+
+@dataclass
+class HostingConfig:
+    """Hosting configuration."""
+    api_key: str
+    endpoint: str = "https://hosting.synor.io/v1"
+    network: Network = Network.MAINNET
+    timeout: float = 60.0
+    retries: int = 3
+    debug: bool = False
+
+
+# ==================== Domain Types ====================
+
+@dataclass
+class DomainRecord:
+    """Domain record for resolution."""
+    cid: Optional[str] = None
+    ipv4: Optional[List[str]] = None
+    ipv6: Optional[List[str]] = None
+    cname: Optional[str] = None
+    txt: Optional[List[str]] = None
+    metadata: Optional[Dict[str, str]] = None
+
+
+@dataclass
+class Domain:
+    """Domain information."""
+    name: str
+    status: DomainStatus
+    owner: str
+    registered_at: int
+    expires_at: int
+    auto_renew: bool = True
+    records: Optional[DomainRecord] = None
+
+
+@dataclass
+class DomainAvailability:
+    """Domain availability check result."""
+    name: str
+    available: bool
+    price: Optional[float] = None
+    premium: bool = False
+
+
+# ==================== DNS Types ====================
+
+@dataclass
+class DnsRecord:
+    """DNS record."""
+    type: DnsRecordType
+    name: str
+    value: str
+    ttl: int = 3600
+    priority: Optional[int] = None  # For MX and SRV
+
+
+@dataclass
+class DnsZone:
+    """DNS zone."""
+    domain: str
+    records: List[DnsRecord]
+    updated_at: int
+
+
+# ==================== Deployment Types ====================
+
+@dataclass
+class RedirectRule:
+    """Redirect rule."""
+    source: str
+    destination: str
+    status_code: int = 301
+    permanent: bool = True
+
+
+@dataclass
+class Deployment:
+    """Deployment information."""
+    id: str
+    domain: str
+    cid: str
+    status: DeploymentStatus
+    url: str
+    created_at: int
+    updated_at: int
+    build_logs: Optional[str] = None
+    error_message: Optional[str] = None
+
+
+@dataclass
+class DeploymentStats:
+    """Deployment statistics."""
+    requests: int
+    bandwidth: int
+    unique_visitors: int
+    period: str
+
+
+# ==================== SSL Types ====================
+
+@dataclass
+class Certificate:
+    """SSL certificate."""
+    domain: str
+    status: CertificateStatus
+    auto_renew: bool
+    issuer: str
+    issued_at: Optional[int] = None
+    expires_at: Optional[int] = None
+    fingerprint: Optional[str] = None
+
+
+# ==================== Site Configuration ====================
+
+@dataclass
+class SiteConfig:
+    """Site configuration."""
+    domain: str
+    cid: Optional[str] = None
+    headers: Optional[Dict[str, str]] = None
+    redirects: Optional[List[RedirectRule]] = None
+    error_pages: Optional[Dict[str, str]] = None
+    spa: bool = False
+    clean_urls: bool = True
+    trailing_slash: bool = False
+
+
+# ==================== Analytics ====================
+
+@dataclass
+class PageView:
+    """Page view data."""
+    path: str
+    views: int
+
+
+@dataclass
+class Referrer:
+    """Referrer data."""
+    referrer: str
+    count: int
+
+
+@dataclass
+class Country:
+    """Country data."""
+    country: str
+    count: int
+
+
+@dataclass
+class AnalyticsData:
+    """Analytics data."""
+    domain: str
+    period: str
+    page_views: int
+    unique_visitors: int
+    bandwidth: int
+    top_pages: List[PageView]
+    top_referrers: List[Referrer]
+    top_countries: List[Country]
+
+
+# ==================== Errors ====================
+
+class HostingError(Exception):
+    """Base exception for hosting errors."""
+
+    def __init__(self, message: str, code: Optional[str] = None, status_code: Optional[int] = None):
+        super().__init__(message)
+        self.code = code
+        self.status_code = status_code
+
+
+class DomainNotFoundError(HostingError):
+    """Raised when a domain is not found."""
+
+    def __init__(self, domain: str):
+        super().__init__(f"Domain not found: {domain}", "DOMAIN_NOT_FOUND", 404)
+
+
+class DomainUnavailableError(HostingError):
+    """Raised when a domain is not available."""
+
+    def __init__(self, domain: str):
+        super().__init__(f"Domain is not available: {domain}", "DOMAIN_UNAVAILABLE", 409)

sdk/ruby/lib/synor_rpc.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require_relative "synor_rpc/version"
+require_relative "synor_rpc/types"
+require_relative "synor_rpc/client"
+
+# Synor RPC SDK for Ruby
+#
+# Blockchain data queries, transaction submission, and real-time subscriptions.
+#
+# @example Quick Start
+#   require 'synor_rpc'
+#
+#   # Create client
+#   client = SynorRpc::Client.new(api_key: 'your-api-key')
+#
+#   # Get latest block
+#   block = client.get_latest_block
+#   puts "Block height: #{block.height}"
+#
+#   # Get transaction
+#   tx = client.get_transaction(txid)
+#   puts "Confirmations: #{tx.confirmations}"
+#
+#   # Subscribe to new blocks
+#   client.subscribe_blocks do |block|
+#     puts "New block: #{block.height}"
+#   end
+#
+module SynorRpc
+  class Error < StandardError; end
+  class ApiError < Error
+    attr_reader :status_code
+
+    def initialize(message, status_code: nil)
+      super(message)
+      @status_code = status_code
+    end
+  end
+  class ClientClosedError < Error; end
+end

sdk/ruby/lib/synor_rpc/client.rb

@@ -0,0 +1,384 @@
+# frozen_string_literal: true
+
+require "faraday"
+require "json"
+
+module SynorRpc
+  # Synor RPC SDK Client
+  #
+  # @example
+  #   client = SynorRpc::Client.new(api_key: 'your-api-key')
+  #
+  #   # Get latest block
+  #   block = client.get_latest_block
+  #
+  #   # Get transaction
+  #   tx = client.get_transaction(txid)
+  #
+  class Client
+    attr_reader :config
+
+    def initialize(api_key: nil, **options)
+      @config = Config.new(api_key: api_key, **options)
+      raise ArgumentError, "API key is required" unless @config.api_key
+
+      @conn = Faraday.new(url: @config.base_url) do |f|
+        f.request :json
+        f.response :json
+        f.options.timeout = @config.timeout
+        f.headers["Authorization"] = "Bearer #{@config.api_key}"
+        f.headers["X-SDK-Version"] = "ruby/#{VERSION}"
+      end
+      @closed = false
+      @subscriptions = {}
+      @ws = nil
+    end
+
+    # ==================== Block Operations ====================
+
+    # Get the latest block
+    #
+    # @return [Block]
+    def get_latest_block
+      check_closed!
+
+      response = with_retry { @conn.get("/blocks/latest") }
+      Block.from_hash(response.body)
+    end
+
+    # Get a block by hash or height
+    #
+    # @param hash_or_height [String, Integer]
+    # @return [Block]
+    def get_block(hash_or_height)
+      check_closed!
+
+      response = with_retry { @conn.get("/blocks/#{hash_or_height}") }
+      Block.from_hash(response.body)
+    end
+
+    # Get a block header
+    #
+    # @param hash_or_height [String, Integer]
+    # @return [BlockHeader]
+    def get_block_header(hash_or_height)
+      check_closed!
+
+      response = with_retry { @conn.get("/blocks/#{hash_or_height}/header") }
+      BlockHeader.from_hash(response.body)
+    end
+
+    # Get a range of blocks
+    #
+    # @param start_height [Integer]
+    # @param end_height [Integer]
+    # @return [Array<Block>]
+    def get_blocks(start_height, end_height)
+      check_closed!
+
+      response = with_retry do
+        @conn.get("/blocks", start: start_height, end: end_height)
+      end
+      response.body.map { |b| Block.from_hash(b) }
+    end
+
+    # ==================== Transaction Operations ====================
+
+    # Get a transaction by ID
+    #
+    # @param txid [String]
+    # @return [Transaction]
+    def get_transaction(txid)
+      check_closed!
+
+      response = with_retry { @conn.get("/transactions/#{txid}") }
+      Transaction.from_hash(response.body)
+    end
+
+    # Get raw transaction hex
+    #
+    # @param txid [String]
+    # @return [String]
+    def get_raw_transaction(txid)
+      check_closed!
+
+      response = with_retry { @conn.get("/transactions/#{txid}/raw") }
+      response.body["hex"]
+    end
+
+    # Send a raw transaction
+    #
+    # @param hex [String]
+    # @return [SubmitResult]
+    def send_raw_transaction(hex)
+      check_closed!
+
+      response = with_retry { @conn.post("/transactions/send", { hex: hex }) }
+      SubmitResult.from_hash(response.body)
+    end
+
+    # Decode a raw transaction
+    #
+    # @param hex [String]
+    # @return [Transaction]
+    def decode_raw_transaction(hex)
+      check_closed!
+
+      response = with_retry { @conn.post("/transactions/decode", { hex: hex }) }
+      Transaction.from_hash(response.body)
+    end
+
+    # Get transactions for an address
+    #
+    # @param address [String]
+    # @param limit [Integer]
+    # @param offset [Integer]
+    # @return [Array<Transaction>]
+    def get_address_transactions(address, limit: 20, offset: 0)
+      check_closed!
+
+      response = with_retry do
+        @conn.get("/addresses/#{address}/transactions", limit: limit, offset: offset)
+      end
+      response.body.map { |t| Transaction.from_hash(t) }
+    end
+
+    # ==================== Fee Estimation ====================
+
+    # Estimate fee
+    #
+    # @param priority [String]
+    # @return [FeeEstimate]
+    def estimate_fee(priority: Priority::MEDIUM)
+      check_closed!
+
+      response = with_retry { @conn.get("/fees/estimate", priority: priority) }
+      FeeEstimate.from_hash(response.body)
+    end
+
+    # Get all fee estimates
+    #
+    # @return [Hash<String, FeeEstimate>]
+    def get_all_fee_estimates
+      check_closed!
+
+      response = with_retry { @conn.get("/fees/estimates") }
+      response.body.to_h { |e| [e["priority"], FeeEstimate.from_hash(e)] }
+    end
+
+    # ==================== Chain Information ====================
+
+    # Get chain info
+    #
+    # @return [ChainInfo]
+    def get_chain_info
+      check_closed!
+
+      response = with_retry { @conn.get("/chain/info") }
+      ChainInfo.from_hash(response.body)
+    end
+
+    # Get mempool info
+    #
+    # @return [MempoolInfo]
+    def get_mempool_info
+      check_closed!
+
+      response = with_retry { @conn.get("/mempool/info") }
+      MempoolInfo.from_hash(response.body)
+    end
+
+    # Get mempool transaction IDs
+    #
+    # @param limit [Integer]
+    # @return [Array<String>]
+    def get_mempool_transactions(limit: 100)
+      check_closed!
+
+      response = with_retry { @conn.get("/mempool/transactions", limit: limit) }
+      response.body
+    end
+
+    # ==================== Subscriptions ====================
+
+    # Subscribe to new blocks
+    #
+    # @yield [Block] Called for each new block
+    # @return [Subscription]
+    def subscribe_blocks(&block)
+      check_closed!
+      raise ArgumentError, "Block required" unless block_given?
+
+      ensure_websocket_connected
+
+      subscription_id = SecureRandom.uuid
+      @subscriptions[subscription_id] = {
+        channel: "blocks",
+        callback: ->(data) { block.call(Block.from_hash(data)) }
+      }
+
+      send_ws_message({
+        type: "subscribe",
+        channel: "blocks",
+        subscription_id: subscription_id
+      })
+
+      Subscription.new(id: subscription_id, channel: "blocks") do
+        @subscriptions.delete(subscription_id)
+        send_ws_message({
+          type: "unsubscribe",
+          subscription_id: subscription_id
+        })
+      end
+    end
+
+    # Subscribe to address transactions
+    #
+    # @param address [String]
+    # @yield [Transaction] Called for each transaction
+    # @return [Subscription]
+    def subscribe_address(address, &block)
+      check_closed!
+      raise ArgumentError, "Block required" unless block_given?
+
+      ensure_websocket_connected
+
+      subscription_id = SecureRandom.uuid
+      @subscriptions[subscription_id] = {
+        channel: "address:#{address}",
+        callback: ->(data) { block.call(Transaction.from_hash(data)) }
+      }
+
+      send_ws_message({
+        type: "subscribe",
+        channel: "address",
+        address: address,
+        subscription_id: subscription_id
+      })
+
+      Subscription.new(id: subscription_id, channel: "address:#{address}") do
+        @subscriptions.delete(subscription_id)
+        send_ws_message({
+          type: "unsubscribe",
+          subscription_id: subscription_id
+        })
+      end
+    end
+
+    # Subscribe to mempool transactions
+    #
+    # @yield [Transaction] Called for each transaction
+    # @return [Subscription]
+    def subscribe_mempool(&block)
+      check_closed!
+      raise ArgumentError, "Block required" unless block_given?
+
+      ensure_websocket_connected
+
+      subscription_id = SecureRandom.uuid
+      @subscriptions[subscription_id] = {
+        channel: "mempool",
+        callback: ->(data) { block.call(Transaction.from_hash(data)) }
+      }
+
+      send_ws_message({
+        type: "subscribe",
+        channel: "mempool",
+        subscription_id: subscription_id
+      })
+
+      Subscription.new(id: subscription_id, channel: "mempool") do
+        @subscriptions.delete(subscription_id)
+        send_ws_message({
+          type: "unsubscribe",
+          subscription_id: subscription_id
+        })
+      end
+    end
+
+    # ==================== Lifecycle ====================
+
+    def close
+      @closed = true
+      @ws&.close
+      @conn.close if @conn.respond_to?(:close)
+    end
+
+    def closed?
+      @closed
+    end
+
+    private
+
+    def check_closed!
+      raise ClientClosedError, "Client has been closed" if @closed
+    end
+
+    def with_retry
+      attempts = 0
+      begin
+        attempts += 1
+        response = yield
+        handle_response(response)
+        response
+      rescue Faraday::Error, ApiError => e
+        if attempts < @config.retries
+          sleep(attempts)
+          retry
+        end
+        raise
+      end
+    end
+
+    def handle_response(response)
+      return if response.success?
+
+      error_message = response.body["error"] || response.body["message"] || "Unknown error"
+      raise ApiError.new(error_message, status_code: response.status)
+    end
+
+    def ensure_websocket_connected
+      return if @ws && @ws_connected
+
+      require "websocket-client-simple"
+
+      @ws = WebSocket::Client::Simple.connect(@config.ws_url, headers: {
+        "Authorization" => "Bearer #{@config.api_key}"
+      })
+
+      @ws.on :message do |msg|
+        handle_ws_message(msg.data)
+      end
+
+      @ws.on :open do
+        @ws_connected = true
+      end
+
+      @ws.on :close do
+        @ws_connected = false
+      end
+
+      @ws.on :error do |e|
+        puts "WebSocket error: #{e.message}" if @config.debug
+      end
+
+      # Wait for connection
+      sleep(0.1) until @ws_connected || @closed
+    end
+
+    def send_ws_message(message)
+      @ws&.send(JSON.generate(message))
+    end
+
+    def handle_ws_message(data)
+      message = JSON.parse(data)
+      subscription_id = message["subscription_id"]
+
+      if subscription_id && @subscriptions[subscription_id]
+        @subscriptions[subscription_id][:callback].call(message["data"])
+      end
+    rescue JSON::ParserError
+      # Skip malformed messages
+    end
+  end
+end

sdk/ruby/lib/synor_rpc/types.rb

@@ -0,0 +1,343 @@
+# frozen_string_literal: true
+
+module SynorRpc
+  # Network environment
+  module Network
+    MAINNET = "mainnet"
+    TESTNET = "testnet"
+    DEVNET = "devnet"
+  end
+
+  # Transaction priority
+  module Priority
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+  end
+
+  # Transaction status
+  module TransactionStatus
+    PENDING = "pending"
+    CONFIRMED = "confirmed"
+    FAILED = "failed"
+  end
+
+  # Configuration
+  class Config
+    attr_reader :api_key, :base_url, :ws_url, :network, :timeout, :retries, :debug
+
+    def initialize(
+      api_key:,
+      base_url: "https://rpc.synor.io/v1",
+      ws_url: "wss://rpc.synor.io/v1/ws",
+      network: Network::MAINNET,
+      timeout: 30,
+      retries: 3,
+      debug: false
+    )
+      @api_key = api_key
+      @base_url = base_url
+      @ws_url = ws_url
+      @network = network
+      @timeout = timeout
+      @retries = retries
+      @debug = debug
+    end
+  end
+
+  # Block header
+  class BlockHeader
+    attr_reader :hash, :height, :previous_hash, :timestamp, :version,
+                :merkle_root, :nonce, :difficulty
+
+    def initialize(hash:, height:, previous_hash:, timestamp:, version:,
+                   merkle_root:, nonce:, difficulty:)
+      @hash = hash
+      @height = height
+      @previous_hash = previous_hash
+      @timestamp = timestamp
+      @version = version
+      @merkle_root = merkle_root
+      @nonce = nonce
+      @difficulty = difficulty
+    end
+
+    def self.from_hash(h)
+      new(
+        hash: h["hash"],
+        height: h["height"],
+        previous_hash: h["previous_hash"],
+        timestamp: h["timestamp"],
+        version: h["version"],
+        merkle_root: h["merkle_root"],
+        nonce: h["nonce"],
+        difficulty: h["difficulty"]
+      )
+    end
+  end
+
+  # Script public key
+  class ScriptPubKey
+    attr_reader :asm, :hex, :type, :address
+
+    def initialize(asm:, hex:, type:, address: nil)
+      @asm = asm
+      @hex = hex
+      @type = type
+      @address = address
+    end
+
+    def self.from_hash(h)
+      new(
+        asm: h["asm"],
+        hex: h["hex"],
+        type: h["type"],
+        address: h["address"]
+      )
+    end
+  end
+
+  # Transaction input
+  class TransactionInput
+    attr_reader :txid, :vout, :script_sig, :sequence, :witness
+
+    def initialize(txid:, vout:, script_sig:, sequence:, witness: nil)
+      @txid = txid
+      @vout = vout
+      @script_sig = script_sig
+      @sequence = sequence
+      @witness = witness
+    end
+
+    def self.from_hash(h)
+      new(
+        txid: h["txid"],
+        vout: h["vout"],
+        script_sig: h["script_sig"],
+        sequence: h["sequence"],
+        witness: h["witness"]
+      )
+    end
+  end
+
+  # Transaction output
+  class TransactionOutput
+    attr_reader :value, :n, :script_pubkey
+
+    def initialize(value:, n:, script_pubkey:)
+      @value = value
+      @n = n
+      @script_pubkey = script_pubkey
+    end
+
+    def self.from_hash(h)
+      new(
+        value: h["value"],
+        n: h["n"],
+        script_pubkey: ScriptPubKey.from_hash(h["script_pubkey"])
+      )
+    end
+  end
+
+  # Transaction
+  class Transaction
+    attr_reader :txid, :hash, :version, :size, :weight, :lock_time,
+                :inputs, :outputs, :fee, :confirmations,
+                :block_hash, :block_height, :timestamp, :status
+
+    def initialize(txid:, hash:, version:, size:, weight:, lock_time:,
+                   inputs:, outputs:, fee:, confirmations:,
+                   block_hash: nil, block_height: nil, timestamp: nil,
+                   status: TransactionStatus::PENDING)
+      @txid = txid
+      @hash = hash
+      @version = version
+      @size = size
+      @weight = weight
+      @lock_time = lock_time
+      @inputs = inputs
+      @outputs = outputs
+      @fee = fee
+      @confirmations = confirmations
+      @block_hash = block_hash
+      @block_height = block_height
+      @timestamp = timestamp
+      @status = status
+    end
+
+    def self.from_hash(h)
+      new(
+        txid: h["txid"],
+        hash: h["hash"],
+        version: h["version"],
+        size: h["size"],
+        weight: h["weight"],
+        lock_time: h["lock_time"],
+        inputs: (h["inputs"] || []).map { |i| TransactionInput.from_hash(i) },
+        outputs: (h["outputs"] || []).map { |o| TransactionOutput.from_hash(o) },
+        fee: h["fee"],
+        confirmations: h["confirmations"],
+        block_hash: h["block_hash"],
+        block_height: h["block_height"],
+        timestamp: h["timestamp"],
+        status: h["status"] || TransactionStatus::PENDING
+      )
+    end
+  end
+
+  # Block
+  class Block
+    attr_reader :hash, :height, :previous_hash, :timestamp, :version,
+                :merkle_root, :nonce, :difficulty, :transactions, :size, :weight
+
+    def initialize(hash:, height:, previous_hash:, timestamp:, version:,
+                   merkle_root:, nonce:, difficulty:, transactions:, size:, weight:)
+      @hash = hash
+      @height = height
+      @previous_hash = previous_hash
+      @timestamp = timestamp
+      @version = version
+      @merkle_root = merkle_root
+      @nonce = nonce
+      @difficulty = difficulty
+      @transactions = transactions
+      @size = size
+      @weight = weight
+    end
+
+    def self.from_hash(h)
+      new(
+        hash: h["hash"],
+        height: h["height"],
+        previous_hash: h["previous_hash"],
+        timestamp: h["timestamp"],
+        version: h["version"],
+        merkle_root: h["merkle_root"],
+        nonce: h["nonce"],
+        difficulty: h["difficulty"],
+        transactions: (h["transactions"] || []).map { |t| Transaction.from_hash(t) },
+        size: h["size"],
+        weight: h["weight"]
+      )
+    end
+  end
+
+  # Chain info
+  class ChainInfo
+    attr_reader :chain, :blocks, :headers, :best_block_hash, :difficulty,
+                :median_time, :verification_progress, :chain_work, :pruned
+
+    def initialize(chain:, blocks:, headers:, best_block_hash:, difficulty:,
+                   median_time:, verification_progress:, chain_work:, pruned:)
+      @chain = chain
+      @blocks = blocks
+      @headers = headers
+      @best_block_hash = best_block_hash
+      @difficulty = difficulty
+      @median_time = median_time
+      @verification_progress = verification_progress
+      @chain_work = chain_work
+      @pruned = pruned
+    end
+
+    def self.from_hash(h)
+      new(
+        chain: h["chain"],
+        blocks: h["blocks"],
+        headers: h["headers"],
+        best_block_hash: h["best_block_hash"],
+        difficulty: h["difficulty"],
+        median_time: h["median_time"],
+        verification_progress: h["verification_progress"],
+        chain_work: h["chain_work"],
+        pruned: h["pruned"]
+      )
+    end
+  end
+
+  # Mempool info
+  class MempoolInfo
+    attr_reader :size, :bytes, :usage, :max_mempool, :mempool_min_fee, :min_relay_tx_fee
+
+    def initialize(size:, bytes:, usage:, max_mempool:, mempool_min_fee:, min_relay_tx_fee:)
+      @size = size
+      @bytes = bytes
+      @usage = usage
+      @max_mempool = max_mempool
+      @mempool_min_fee = mempool_min_fee
+      @min_relay_tx_fee = min_relay_tx_fee
+    end
+
+    def self.from_hash(h)
+      new(
+        size: h["size"],
+        bytes: h["bytes"],
+        usage: h["usage"],
+        max_mempool: h["max_mempool"],
+        mempool_min_fee: h["mempool_min_fee"],
+        min_relay_tx_fee: h["min_relay_tx_fee"]
+      )
+    end
+  end
+
+  # Fee estimate
+  class FeeEstimate
+    attr_reader :priority, :fee_rate, :estimated_blocks
+
+    def initialize(priority:, fee_rate:, estimated_blocks:)
+      @priority = priority
+      @fee_rate = fee_rate
+      @estimated_blocks = estimated_blocks
+    end
+
+    def self.from_hash(h)
+      new(
+        priority: h["priority"],
+        fee_rate: h["fee_rate"],
+        estimated_blocks: h["estimated_blocks"]
+      )
+    end
+  end
+
+  # Submit result
+  class SubmitResult
+    attr_reader :txid, :accepted, :reason
+
+    def initialize(txid:, accepted:, reason: nil)
+      @txid = txid
+      @accepted = accepted
+      @reason = reason
+    end
+
+    def self.from_hash(h)
+      new(
+        txid: h["txid"],
+        accepted: h["accepted"],
+        reason: h["reason"]
+      )
+    end
+  end
+
+  # Subscription handle
+  class Subscription
+    attr_reader :id, :channel
+
+    def initialize(id:, channel:, &on_cancel)
+      @id = id
+      @channel = channel
+      @on_cancel = on_cancel
+      @cancelled = false
+    end
+
+    def cancel
+      return if @cancelled
+
+      @on_cancel&.call
+      @cancelled = true
+    end
+
+    def cancelled?
+      @cancelled
+    end
+  end
+end

sdk/ruby/lib/synor_rpc/version.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module SynorRpc
+  VERSION = "0.1.0"
+end

sdk/ruby/lib/synor_storage.rb

@@ -0,0 +1,40 @@
+# frozen_string_literal: true
+
+require_relative "synor_storage/version"
+require_relative "synor_storage/types"
+require_relative "synor_storage/client"
+
+# Synor Storage SDK for Ruby
+#
+# Decentralized storage operations including upload, download, pinning, and directory management.
+#
+# @example Quick Start
+#   require 'synor_storage'
+#
+#   # Create client
+#   client = SynorStorage::Client.new(api_key: 'your-api-key')
+#
+#   # Upload a file
+#   result = client.upload(File.read('document.pdf'), name: 'document.pdf')
+#   puts "CID: #{result.cid}"
+#
+#   # Download a file
+#   data = client.download(result.cid)
+#   File.write('downloaded.pdf', data)
+#
+#   # Get gateway URL
+#   url = client.get_gateway_url(result.cid)
+#   puts "URL: #{url}"
+#
+module SynorStorage
+  class Error < StandardError; end
+  class ApiError < Error
+    attr_reader :status_code
+
+    def initialize(message, status_code: nil)
+      super(message)
+      @status_code = status_code
+    end
+  end
+  class ClientClosedError < Error; end
+end

sdk/ruby/lib/synor_storage/client.rb

@@ -0,0 +1,317 @@
+# frozen_string_literal: true
+
+require "faraday"
+require "faraday/multipart"
+require "json"
+require "base64"
+
+module SynorStorage
+  # Synor Storage SDK Client
+  #
+  # @example
+  #   client = SynorStorage::Client.new(api_key: 'your-api-key')
+  #
+  #   # Upload file
+  #   result = client.upload(data, name: 'file.txt')
+  #
+  #   # Download file
+  #   data = client.download(cid)
+  #
+  class Client
+    attr_reader :config
+
+    def initialize(api_key: nil, **options)
+      @config = Config.new(api_key: api_key, **options)
+      raise ArgumentError, "API key is required" unless @config.api_key
+
+      @conn = Faraday.new(url: @config.base_url) do |f|
+        f.request :multipart
+        f.request :url_encoded
+        f.response :json
+        f.options.timeout = @config.timeout
+        f.headers["Authorization"] = "Bearer #{@config.api_key}"
+        f.headers["X-SDK-Version"] = "ruby/#{VERSION}"
+      end
+      @closed = false
+    end
+
+    # ==================== Upload Operations ====================
+
+    # Upload data to storage
+    #
+    # @param data [String, IO] Data to upload
+    # @param options [UploadOptions, Hash] Upload options
+    # @return [UploadResponse]
+    def upload(data, name: nil, content_type: nil, pin: true, metadata: nil, wrap_with_directory: false)
+      check_closed!
+
+      payload = {
+        file: Faraday::Multipart::FilePart.new(
+          StringIO.new(data.is_a?(String) ? data : data.read),
+          content_type || "application/octet-stream",
+          name || "file"
+        ),
+        pin: pin.to_s,
+        wrap_with_directory: wrap_with_directory.to_s
+      }
+
+      if metadata
+        metadata.each do |key, value|
+          payload["metadata[#{key}]"] = value
+        end
+      end
+
+      response = with_retry { @conn.post("/upload", payload) }
+      UploadResponse.from_hash(response.body)
+    end
+
+    # Upload a directory of files
+    #
+    # @param files [Array<FileEntry>] Files to upload
+    # @param directory_name [String, nil] Optional directory name
+    # @return [UploadResponse]
+    def upload_directory(files, directory_name: nil)
+      check_closed!
+
+      payload = {}
+      files.each_with_index do |file, i|
+        payload["files[#{i}]"] = Faraday::Multipart::FilePart.new(
+          StringIO.new(file.content),
+          file.content_type || "application/octet-stream",
+          file.path
+        )
+      end
+
+      payload["directory_name"] = directory_name if directory_name
+
+      response = with_retry { @conn.post("/upload/directory", payload) }
+      UploadResponse.from_hash(response.body)
+    end
+
+    # ==================== Download Operations ====================
+
+    # Download content by CID
+    #
+    # @param cid [String]
+    # @return [String] Binary data
+    def download(cid)
+      check_closed!
+
+      response = with_retry do
+        @conn.get("/download/#{cid}") do |req|
+          req.headers["Accept"] = "*/*"
+        end
+      end
+
+      response.body
+    end
+
+    # Download content with streaming
+    #
+    # @param cid [String]
+    # @yield [String] Chunks of data
+    def download_stream(cid, &block)
+      check_closed!
+      raise ArgumentError, "Block required for streaming" unless block_given?
+
+      @conn.get("/download/#{cid}") do |req|
+        req.headers["Accept"] = "*/*"
+        req.options.on_data = proc do |chunk, _|
+          block.call(chunk)
+        end
+      end
+    end
+
+    # Get gateway URL for a CID
+    #
+    # @param cid [String]
+    # @param path [String, nil] Optional path within the CID
+    # @return [String]
+    def get_gateway_url(cid, path: nil)
+      url = "#{@config.gateway}/ipfs/#{cid}"
+      url += "/#{path.gsub(%r{^/}, '')}" if path
+      url
+    end
+
+    # ==================== Pinning Operations ====================
+
+    # Pin content by CID
+    #
+    # @param request [PinRequest, Hash] Pin request
+    # @return [Pin]
+    def pin(request)
+      check_closed!
+
+      body = request.is_a?(PinRequest) ? request.to_h : request
+      response = with_retry { post_json("/pins", body) }
+      Pin.from_hash(response.body)
+    end
+
+    # Unpin content
+    #
+    # @param cid [String]
+    def unpin(cid)
+      check_closed!
+
+      with_retry { @conn.delete("/pins/#{cid}") }
+      nil
+    end
+
+    # Get pin status
+    #
+    # @param cid [String]
+    # @return [Pin]
+    def get_pin_status(cid)
+      check_closed!
+
+      response = with_retry { @conn.get("/pins/#{cid}") }
+      Pin.from_hash(response.body)
+    end
+
+    # List pins
+    #
+    # @param status [String, nil] Filter by status
+    # @param limit [Integer]
+    # @param offset [Integer]
+    # @return [Array<Pin>]
+    def list_pins(status: nil, limit: 20, offset: 0)
+      check_closed!
+
+      params = { limit: limit, offset: offset }
+      params[:status] = status if status
+
+      response = with_retry { @conn.get("/pins", params) }
+      response.body.map { |p| Pin.from_hash(p) }
+    end
+
+    # ==================== CAR File Operations ====================
+
+    # Create a CAR file from entries
+    #
+    # @param entries [Array<FileEntry>]
+    # @return [CarFile]
+    def create_car(entries)
+      check_closed!
+
+      body = entries.map do |e|
+        {
+          path: e.path,
+          content: Base64.strict_encode64(e.content),
+          content_type: e.content_type
+        }
+      end
+
+      response = with_retry { post_json("/car/create", body) }
+      CarFile.from_hash(response.body)
+    end
+
+    # Import a CAR file
+    #
+    # @param car_data [String] Binary CAR data
+    # @return [Array<String>] CIDs
+    def import_car(car_data)
+      check_closed!
+
+      response = with_retry do
+        @conn.post("/car/import") do |req|
+          req.headers["Content-Type"] = "application/vnd.ipld.car"
+          req.body = car_data
+        end
+      end
+
+      response.body["cids"]
+    end
+
+    # Export content as a CAR file
+    #
+    # @param cid [String]
+    # @return [String] Binary CAR data
+    def export_car(cid)
+      check_closed!
+
+      response = with_retry do
+        @conn.get("/car/export/#{cid}") do |req|
+          req.headers["Accept"] = "application/vnd.ipld.car"
+        end
+      end
+
+      response.body
+    end
+
+    # ==================== Directory Operations ====================
+
+    # List directory contents
+    #
+    # @param cid [String]
+    # @return [Array<DirectoryEntry>]
+    def list_directory(cid)
+      check_closed!
+
+      response = with_retry { @conn.get("/directory/#{cid}") }
+      response.body.map { |e| DirectoryEntry.from_hash(e) }
+    end
+
+    # ==================== Statistics ====================
+
+    # Get storage statistics
+    #
+    # @return [StorageStats]
+    def get_stats
+      check_closed!
+
+      response = with_retry { @conn.get("/stats") }
+      StorageStats.from_hash(response.body)
+    end
+
+    # ==================== Lifecycle ====================
+
+    def close
+      @closed = true
+      @conn.close if @conn.respond_to?(:close)
+    end
+
+    def closed?
+      @closed
+    end
+
+    private
+
+    def check_closed!
+      raise ClientClosedError, "Client has been closed" if @closed
+    end
+
+    def post_json(path, body)
+      @conn.post(path) do |req|
+        req.headers["Content-Type"] = "application/json"
+        req.body = JSON.generate(body)
+      end
+    end
+
+    def with_retry
+      attempts = 0
+      begin
+        attempts += 1
+        response = yield
+        handle_response(response)
+        response
+      rescue Faraday::Error, ApiError => e
+        if attempts < @config.retries
+          sleep(attempts)
+          retry
+        end
+        raise
+      end
+    end
+
+    def handle_response(response)
+      return if response.success?
+
+      error_message = if response.body.is_a?(Hash)
+                        response.body["error"] || response.body["message"] || "Unknown error"
+                      else
+                        "HTTP #{response.status}"
+                      end
+      raise ApiError.new(error_message, status_code: response.status)
+    end
+  end
+end

sdk/ruby/lib/synor_storage/types.rb

@@ -0,0 +1,209 @@
+# frozen_string_literal: true
+
+module SynorStorage
+  # Network environment
+  module Network
+    MAINNET = "mainnet"
+    TESTNET = "testnet"
+    DEVNET = "devnet"
+  end
+
+  # Pin status
+  module PinStatus
+    QUEUED = "queued"
+    PINNING = "pinning"
+    PINNED = "pinned"
+    FAILED = "failed"
+  end
+
+  # Configuration
+  class Config
+    attr_reader :api_key, :base_url, :gateway, :network, :timeout, :retries, :debug
+
+    def initialize(
+      api_key:,
+      base_url: "https://storage.synor.io/v1",
+      gateway: "https://gateway.synor.io",
+      network: Network::MAINNET,
+      timeout: 300,
+      retries: 3,
+      debug: false
+    )
+      @api_key = api_key
+      @base_url = base_url
+      @gateway = gateway
+      @network = network
+      @timeout = timeout
+      @retries = retries
+      @debug = debug
+    end
+  end
+
+  # Upload options
+  class UploadOptions
+    attr_reader :name, :content_type, :pin, :metadata, :wrap_with_directory
+
+    def initialize(
+      name: nil,
+      content_type: nil,
+      pin: true,
+      metadata: nil,
+      wrap_with_directory: false
+    )
+      @name = name
+      @content_type = content_type
+      @pin = pin
+      @metadata = metadata
+      @wrap_with_directory = wrap_with_directory
+    end
+  end
+
+  # Upload response
+  class UploadResponse
+    attr_reader :cid, :size, :name, :pinned
+
+    def initialize(cid:, size:, name: nil, pinned: true)
+      @cid = cid
+      @size = size
+      @name = name
+      @pinned = pinned
+    end
+
+    def self.from_hash(h)
+      new(
+        cid: h["cid"],
+        size: h["size"],
+        name: h["name"],
+        pinned: h["pinned"] || true
+      )
+    end
+  end
+
+  # Pin request
+  class PinRequest
+    attr_reader :cid, :name, :metadata, :origins
+
+    def initialize(cid:, name: nil, metadata: nil, origins: nil)
+      @cid = cid
+      @name = name
+      @metadata = metadata
+      @origins = origins
+    end
+
+    def to_h
+      {
+        cid: @cid,
+        name: @name,
+        metadata: @metadata,
+        origins: @origins
+      }.compact
+    end
+  end
+
+  # Pin information
+  class Pin
+    attr_reader :cid, :name, :status, :size, :created_at, :metadata
+
+    def initialize(cid:, name:, status:, size:, created_at:, metadata: nil)
+      @cid = cid
+      @name = name
+      @status = status
+      @size = size
+      @created_at = created_at
+      @metadata = metadata
+    end
+
+    def self.from_hash(h)
+      new(
+        cid: h["cid"],
+        name: h["name"],
+        status: h["status"],
+        size: h["size"],
+        created_at: h["created_at"],
+        metadata: h["metadata"]
+      )
+    end
+  end
+
+  # File entry for directory operations
+  class FileEntry
+    attr_reader :path, :content, :content_type
+
+    def initialize(path:, content:, content_type: nil)
+      @path = path
+      @content = content
+      @content_type = content_type
+    end
+  end
+
+  # Directory entry
+  class DirectoryEntry
+    attr_reader :name, :cid, :size, :type
+
+    def initialize(name:, cid:, size:, type:)
+      @name = name
+      @cid = cid
+      @size = size
+      @type = type
+    end
+
+    def self.from_hash(h)
+      new(
+        name: h["name"],
+        cid: h["cid"],
+        size: h["size"],
+        type: h["type"]
+      )
+    end
+
+    def file?
+      @type == "file"
+    end
+
+    def directory?
+      @type == "directory"
+    end
+  end
+
+  # CAR file
+  class CarFile
+    attr_reader :root_cid, :data, :size
+
+    def initialize(root_cid:, data:, size:)
+      @root_cid = root_cid
+      @data = data
+      @size = size
+    end
+
+    def self.from_hash(h)
+      new(
+        root_cid: h["root_cid"],
+        data: h["data"],
+        size: h["size"]
+      )
+    end
+  end
+
+  # Storage statistics
+  class StorageStats
+    attr_reader :total_size, :pin_count, :bandwidth_used, :storage_limit, :bandwidth_limit
+
+    def initialize(total_size:, pin_count:, bandwidth_used:, storage_limit:, bandwidth_limit:)
+      @total_size = total_size
+      @pin_count = pin_count
+      @bandwidth_used = bandwidth_used
+      @storage_limit = storage_limit
+      @bandwidth_limit = bandwidth_limit
+    end
+
+    def self.from_hash(h)
+      new(
+        total_size: h["total_size"],
+        pin_count: h["pin_count"],
+        bandwidth_used: h["bandwidth_used"],
+        storage_limit: h["storage_limit"],
+        bandwidth_limit: h["bandwidth_limit"]
+      )
+    end
+  end
+end

sdk/ruby/lib/synor_storage/version.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module SynorStorage
+  VERSION = "0.1.0"
+end

sdk/ruby/lib/synor_wallet.rb

@@ -0,0 +1,41 @@
+# frozen_string_literal: true
+
+require_relative "synor_wallet/version"
+require_relative "synor_wallet/types"
+require_relative "synor_wallet/client"
+
+# Synor Wallet SDK for Ruby
+#
+# Key management, transaction signing, and balance queries for the Synor blockchain.
+#
+# @example Quick Start
+#   require 'synor_wallet'
+#
+#   # Create client
+#   client = SynorWallet::Client.new(api_key: 'your-api-key')
+#
+#   # Create a new wallet
+#   result = client.create_wallet
+#   puts "Wallet ID: #{result.wallet.id}"
+#   puts "Mnemonic: #{result.mnemonic}"
+#
+#   # Get balance
+#   balance = client.get_balance(result.wallet.addresses.first.address)
+#   puts "Balance: #{balance.total}"
+#
+#   # Sign a message
+#   signature = client.sign_message(result.wallet.id, "Hello, Synor!")
+#   puts "Signature: #{signature.signature}"
+#
+module SynorWallet
+  class Error < StandardError; end
+  class ApiError < Error
+    attr_reader :status_code
+
+    def initialize(message, status_code: nil)
+      super(message)
+      @status_code = status_code
+    end
+  end
+  class ClientClosedError < Error; end
+end

sdk/ruby/lib/synor_wallet/client.rb

@@ -0,0 +1,244 @@
+# frozen_string_literal: true
+
+require "faraday"
+require "json"
+
+module SynorWallet
+  # Synor Wallet SDK Client
+  #
+  # @example
+  #   client = SynorWallet::Client.new(api_key: 'your-api-key')
+  #
+  #   # Create wallet
+  #   result = client.create_wallet
+  #   puts result.mnemonic
+  #
+  #   # Get balance
+  #   balance = client.get_balance(address)
+  #
+  class Client
+    attr_reader :config
+
+    def initialize(api_key: nil, **options)
+      @config = Config.new(api_key: api_key, **options)
+      raise ArgumentError, "API key is required" unless @config.api_key
+
+      @conn = Faraday.new(url: @config.base_url) do |f|
+        f.request :json
+        f.response :json
+        f.options.timeout = @config.timeout
+        f.headers["Authorization"] = "Bearer #{@config.api_key}"
+        f.headers["X-SDK-Version"] = "ruby/#{VERSION}"
+      end
+      @closed = false
+    end
+
+    # ==================== Wallet Operations ====================
+
+    # Create a new wallet
+    #
+    # @param type [String] Wallet type (standard, multisig, hardware)
+    # @return [CreateWalletResult]
+    def create_wallet(type: WalletType::STANDARD)
+      check_closed!
+
+      body = {
+        type: type,
+        network: @config.network
+      }
+
+      response = with_retry { @conn.post("/wallets", body) }
+      CreateWalletResult.from_hash(response.body)
+    end
+
+    # Import wallet from mnemonic
+    #
+    # @param mnemonic [String] 12 or 24 word mnemonic phrase
+    # @param passphrase [String, nil] Optional passphrase
+    # @return [Wallet]
+    def import_wallet(mnemonic, passphrase: nil)
+      check_closed!
+
+      body = {
+        mnemonic: mnemonic,
+        passphrase: passphrase,
+        network: @config.network
+      }
+
+      response = with_retry { @conn.post("/wallets/import", body) }
+      Wallet.from_hash(response.body)
+    end
+
+    # Get wallet by ID
+    #
+    # @param wallet_id [String]
+    # @return [Wallet]
+    def get_wallet(wallet_id)
+      check_closed!
+
+      response = with_retry { @conn.get("/wallets/#{wallet_id}") }
+      Wallet.from_hash(response.body)
+    end
+
+    # Generate a new address
+    #
+    # @param wallet_id [String]
+    # @param is_change [Boolean]
+    # @return [Address]
+    def generate_address(wallet_id, is_change: false)
+      check_closed!
+
+      body = { is_change: is_change }
+      response = with_retry { @conn.post("/wallets/#{wallet_id}/addresses", body) }
+      Address.from_hash(response.body)
+    end
+
+    # Get stealth address
+    #
+    # @param wallet_id [String]
+    # @return [StealthAddress]
+    def get_stealth_address(wallet_id)
+      check_closed!
+
+      response = with_retry { @conn.get("/wallets/#{wallet_id}/stealth-address") }
+      StealthAddress.from_hash(response.body)
+    end
+
+    # ==================== Signing Operations ====================
+
+    # Sign a transaction
+    #
+    # @param wallet_id [String]
+    # @param transaction [Transaction]
+    # @return [SignedTransaction]
+    def sign_transaction(wallet_id, transaction)
+      check_closed!
+
+      body = {
+        wallet_id: wallet_id,
+        transaction: transaction.to_h
+      }
+
+      response = with_retry { @conn.post("/transactions/sign", body) }
+      SignedTransaction.from_hash(response.body)
+    end
+
+    # Sign a message
+    #
+    # @param wallet_id [String]
+    # @param message [String]
+    # @param address_index [Integer]
+    # @return [Signature]
+    def sign_message(wallet_id, message, address_index: 0)
+      check_closed!
+
+      body = {
+        wallet_id: wallet_id,
+        message: message,
+        address_index: address_index
+      }
+
+      response = with_retry { @conn.post("/messages/sign", body) }
+      Signature.from_hash(response.body)
+    end
+
+    # Verify a message signature
+    #
+    # @param message [String]
+    # @param signature [String]
+    # @param address [String]
+    # @return [Boolean]
+    def verify_message(message, signature, address)
+      check_closed!
+
+      body = {
+        message: message,
+        signature: signature,
+        address: address
+      }
+
+      response = with_retry { @conn.post("/messages/verify", body) }
+      response.body["valid"]
+    end
+
+    # ==================== Balance & UTXOs ====================
+
+    # Get balance for an address
+    #
+    # @param address [String]
+    # @return [Balance]
+    def get_balance(address)
+      check_closed!
+
+      response = with_retry { @conn.get("/addresses/#{address}/balance") }
+      Balance.from_hash(response.body)
+    end
+
+    # Get UTXOs for an address
+    #
+    # @param address [String]
+    # @param min_confirmations [Integer]
+    # @return [Array<UTXO>]
+    def get_utxos(address, min_confirmations: 1)
+      check_closed!
+
+      response = with_retry do
+        @conn.get("/addresses/#{address}/utxos", min_confirmations: min_confirmations)
+      end
+      response.body.map { |u| UTXO.from_hash(u) }
+    end
+
+    # ==================== Fee Estimation ====================
+
+    # Estimate fee
+    #
+    # @param priority [String]
+    # @return [Integer] Fee per byte in satoshis
+    def estimate_fee(priority: Priority::MEDIUM)
+      check_closed!
+
+      response = with_retry { @conn.get("/fees/estimate", priority: priority) }
+      response.body["fee_per_byte"]
+    end
+
+    # ==================== Lifecycle ====================
+
+    def close
+      @closed = true
+      @conn.close if @conn.respond_to?(:close)
+    end
+
+    def closed?
+      @closed
+    end
+
+    private
+
+    def check_closed!
+      raise ClientClosedError, "Client has been closed" if @closed
+    end
+
+    def with_retry
+      attempts = 0
+      begin
+        attempts += 1
+        response = yield
+        handle_response(response)
+        response
+      rescue Faraday::Error, ApiError => e
+        if attempts < @config.retries
+          sleep(attempts)
+          retry
+        end
+        raise
+      end
+    end
+
+    def handle_response(response)
+      return if response.success?
+
+      error_message = response.body["error"] || response.body["message"] || "Unknown error"
+      raise ApiError.new(error_message, status_code: response.status)
+    end
+  end
+end

sdk/ruby/lib/synor_wallet/types.rb

@@ -0,0 +1,269 @@
+# frozen_string_literal: true
+
+module SynorWallet
+  # Network environment
+  module Network
+    MAINNET = "mainnet"
+    TESTNET = "testnet"
+    DEVNET = "devnet"
+  end
+
+  # Wallet types
+  module WalletType
+    STANDARD = "standard"
+    MULTISIG = "multisig"
+    HARDWARE = "hardware"
+  end
+
+  # Address types
+  module AddressType
+    P2PKH = "p2pkh"
+    P2SH = "p2sh"
+    P2WPKH = "p2wpkh"
+    P2WSH = "p2wsh"
+  end
+
+  # Transaction priority
+  module Priority
+    LOW = "low"
+    MEDIUM = "medium"
+    HIGH = "high"
+  end
+
+  # Configuration
+  class Config
+    attr_reader :api_key, :base_url, :network, :timeout, :retries, :debug
+
+    def initialize(
+      api_key:,
+      base_url: "https://wallet.synor.io/v1",
+      network: Network::MAINNET,
+      timeout: 30,
+      retries: 3,
+      debug: false
+    )
+      @api_key = api_key
+      @base_url = base_url
+      @network = network
+      @timeout = timeout
+      @retries = retries
+      @debug = debug
+    end
+  end
+
+  # Address information
+  class Address
+    attr_reader :address, :type, :index, :is_change, :public_key
+
+    def initialize(address:, type:, index:, is_change: false, public_key: nil)
+      @address = address
+      @type = type
+      @index = index
+      @is_change = is_change
+      @public_key = public_key
+    end
+
+    def self.from_hash(h)
+      new(
+        address: h["address"],
+        type: h["type"],
+        index: h["index"],
+        is_change: h["is_change"] || false,
+        public_key: h["public_key"]
+      )
+    end
+  end
+
+  # Stealth address
+  class StealthAddress
+    attr_reader :scan_public_key, :spend_public_key, :address
+
+    def initialize(scan_public_key:, spend_public_key:, address:)
+      @scan_public_key = scan_public_key
+      @spend_public_key = spend_public_key
+      @address = address
+    end
+
+    def self.from_hash(h)
+      new(
+        scan_public_key: h["scan_public_key"],
+        spend_public_key: h["spend_public_key"],
+        address: h["address"]
+      )
+    end
+  end
+
+  # Wallet information
+  class Wallet
+    attr_reader :id, :name, :type, :network, :addresses, :created_at
+
+    def initialize(id:, name:, type:, network:, addresses:, created_at:)
+      @id = id
+      @name = name
+      @type = type
+      @network = network
+      @addresses = addresses
+      @created_at = created_at
+    end
+
+    def self.from_hash(h)
+      new(
+        id: h["id"],
+        name: h["name"],
+        type: h["type"],
+        network: h["network"],
+        addresses: (h["addresses"] || []).map { |a| Address.from_hash(a) },
+        created_at: h["created_at"]
+      )
+    end
+  end
+
+  # Create wallet result
+  class CreateWalletResult
+    attr_reader :wallet, :mnemonic
+
+    def initialize(wallet:, mnemonic:)
+      @wallet = wallet
+      @mnemonic = mnemonic
+    end
+
+    def self.from_hash(h)
+      new(
+        wallet: Wallet.from_hash(h["wallet"]),
+        mnemonic: h["mnemonic"]
+      )
+    end
+  end
+
+  # Balance information
+  class Balance
+    attr_reader :confirmed, :unconfirmed, :total
+
+    def initialize(confirmed:, unconfirmed:, total:)
+      @confirmed = confirmed
+      @unconfirmed = unconfirmed
+      @total = total
+    end
+
+    def self.from_hash(h)
+      new(
+        confirmed: h["confirmed"],
+        unconfirmed: h["unconfirmed"],
+        total: h["total"]
+      )
+    end
+  end
+
+  # UTXO
+  class UTXO
+    attr_reader :txid, :vout, :value, :confirmations, :script_pubkey
+
+    def initialize(txid:, vout:, value:, confirmations:, script_pubkey:)
+      @txid = txid
+      @vout = vout
+      @value = value
+      @confirmations = confirmations
+      @script_pubkey = script_pubkey
+    end
+
+    def self.from_hash(h)
+      new(
+        txid: h["txid"],
+        vout: h["vout"],
+        value: h["value"],
+        confirmations: h["confirmations"],
+        script_pubkey: h["script_pubkey"]
+      )
+    end
+  end
+
+  # Transaction input
+  class TransactionInput
+    attr_reader :txid, :vout, :sequence
+
+    def initialize(txid:, vout:, sequence: 0xFFFFFFFF)
+      @txid = txid
+      @vout = vout
+      @sequence = sequence
+    end
+
+    def to_h
+      { txid: @txid, vout: @vout, sequence: @sequence }
+    end
+  end
+
+  # Transaction output
+  class TransactionOutput
+    attr_reader :address, :value
+
+    def initialize(address:, value:)
+      @address = address
+      @value = value
+    end
+
+    def to_h
+      { address: @address, value: @value }
+    end
+  end
+
+  # Transaction
+  class Transaction
+    attr_reader :inputs, :outputs, :lock_time
+
+    def initialize(inputs:, outputs:, lock_time: 0)
+      @inputs = inputs
+      @outputs = outputs
+      @lock_time = lock_time
+    end
+
+    def to_h
+      {
+        inputs: @inputs.map(&:to_h),
+        outputs: @outputs.map(&:to_h),
+        lock_time: @lock_time
+      }
+    end
+  end
+
+  # Signed transaction
+  class SignedTransaction
+    attr_reader :txid, :raw, :size, :weight, :fee
+
+    def initialize(txid:, raw:, size:, weight:, fee:)
+      @txid = txid
+      @raw = raw
+      @size = size
+      @weight = weight
+      @fee = fee
+    end
+
+    def self.from_hash(h)
+      new(
+        txid: h["txid"],
+        raw: h["raw"],
+        size: h["size"],
+        weight: h["weight"],
+        fee: h["fee"]
+      )
+    end
+  end
+
+  # Signature
+  class Signature
+    attr_reader :signature, :recovery_id, :address
+
+    def initialize(signature:, recovery_id:, address:)
+      @signature = signature
+      @recovery_id = recovery_id
+      @address = address
+    end
+
+    def self.from_hash(h)
+      new(
+        signature: h["signature"],
+        recovery_id: h["recovery_id"],
+        address: h["address"]
+      )
+    end
+  end
+end

sdk/ruby/lib/synor_wallet/version.rb

@@ -0,0 +1,5 @@
+# frozen_string_literal: true
+
+module SynorWallet
+  VERSION = "0.1.0"
+end

sdk/ruby/synor_rpc.gemspec

@@ -0,0 +1,23 @@
+Gem::Specification.new do |spec|
+  spec.name          = "synor_rpc"
+  spec.version       = "0.1.0"
+  spec.authors       = ["Synor"]
+  spec.email         = ["sdk@synor.io"]
+
+  spec.summary       = "Ruby SDK for Synor RPC - Blockchain Data Queries"
+  spec.description   = "Blockchain data queries, transaction submission, and real-time subscriptions via WebSocket."
+  spec.homepage      = "https://github.com/synor/synor-rpc-ruby"
+  spec.license       = "MIT"
+  spec.required_ruby_version = ">= 3.0"
+
+  spec.files         = Dir["lib/synor_rpc.rb", "lib/synor_rpc/**/*", "LICENSE", "README.md"]
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "faraday", "~> 2.0"
+  spec.add_dependency "websocket-client-simple", "~> 0.6"
+
+  spec.add_development_dependency "bundler", "~> 2.0"
+  spec.add_development_dependency "rake", "~> 13.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+  spec.add_development_dependency "webmock", "~> 3.0"
+end

sdk/ruby/synor_storage.gemspec

@@ -0,0 +1,23 @@
+Gem::Specification.new do |spec|
+  spec.name          = "synor_storage"
+  spec.version       = "0.1.0"
+  spec.authors       = ["Synor"]
+  spec.email         = ["sdk@synor.io"]
+
+  spec.summary       = "Ruby SDK for Synor Storage - Decentralized Storage"
+  spec.description   = "Decentralized storage operations including upload, download, pinning, and directory management."
+  spec.homepage      = "https://github.com/synor/synor-storage-ruby"
+  spec.license       = "MIT"
+  spec.required_ruby_version = ">= 3.0"
+
+  spec.files         = Dir["lib/synor_storage.rb", "lib/synor_storage/**/*", "LICENSE", "README.md"]
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "faraday", "~> 2.0"
+  spec.add_dependency "faraday-multipart", "~> 1.0"
+
+  spec.add_development_dependency "bundler", "~> 2.0"
+  spec.add_development_dependency "rake", "~> 13.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+  spec.add_development_dependency "webmock", "~> 3.0"
+end

sdk/ruby/synor_wallet.gemspec

@@ -0,0 +1,23 @@
+Gem::Specification.new do |spec|
+  spec.name          = "synor_wallet"
+  spec.version       = "0.1.0"
+  spec.authors       = ["Synor"]
+  spec.email         = ["sdk@synor.io"]
+
+  spec.summary       = "Ruby SDK for Synor Wallet - Blockchain Key Management"
+  spec.description   = "Key management, transaction signing, and balance queries for the Synor blockchain."
+  spec.homepage      = "https://github.com/synor/synor-wallet-ruby"
+  spec.license       = "MIT"
+  spec.required_ruby_version = ">= 3.0"
+
+  spec.files         = Dir["lib/synor_wallet.rb", "lib/synor_wallet/**/*", "LICENSE", "README.md"]
+  spec.require_paths = ["lib"]
+
+  spec.add_dependency "faraday", "~> 2.0"
+  spec.add_dependency "faraday-multipart", "~> 1.0"
+
+  spec.add_development_dependency "bundler", "~> 2.0"
+  spec.add_development_dependency "rake", "~> 13.0"
+  spec.add_development_dependency "rspec", "~> 3.0"
+  spec.add_development_dependency "webmock", "~> 3.0"
+end

sdk/rust/src/bridge/client.rs

@@ -0,0 +1,554 @@
+//! Bridge client implementation
+
+use reqwest::header::{HeaderMap, HeaderValue, AUTHORIZATION, CONTENT_TYPE};
+use serde::{de::DeserializeOwned, Serialize};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
+use std::time::Duration;
+
+use super::error::{BridgeError, Result};
+use super::types::*;
+
+/// Synor Bridge Client
+pub struct BridgeClient {
+    config: BridgeConfig,
+    http_client: reqwest::Client,
+    closed: Arc<AtomicBool>,
+}
+
+impl BridgeClient {
+    /// Create a new bridge client
+    pub fn new(config: BridgeConfig) -> Self {
+        let mut headers = HeaderMap::new();
+        headers.insert(
+            AUTHORIZATION,
+            HeaderValue::from_str(&format!("Bearer {}", config.api_key)).unwrap(),
+        );
+        headers.insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
+        headers.insert("X-SDK-Version", HeaderValue::from_static("rust/0.1.0"));
+
+        let http_client = reqwest::Client::builder()
+            .default_headers(headers)
+            .timeout(Duration::from_secs(config.timeout_secs))
+            .build()
+            .expect("Failed to create HTTP client");
+
+        Self {
+            config,
+            http_client,
+            closed: Arc::new(AtomicBool::new(false)),
+        }
+    }
+
+    // ==================== Chain Operations ====================
+
+    /// Get all supported chains
+    pub async fn get_supported_chains(&self) -> Result<Vec<Chain>> {
+        #[derive(Deserialize)]
+        struct Response {
+            chains: Vec<Chain>,
+        }
+        let resp: Response = self.request("GET", "/chains", Option::<()>::None).await?;
+        Ok(resp.chains)
+    }
+
+    /// Get chain by ID
+    pub async fn get_chain(&self, chain_id: ChainId) -> Result<Chain> {
+        self.request("GET", &format!("/chains/{:?}", chain_id).to_lowercase(), Option::<()>::None).await
+    }
+
+    /// Check if chain is supported
+    pub async fn is_chain_supported(&self, chain_id: ChainId) -> bool {
+        match self.get_chain(chain_id).await {
+            Ok(chain) => chain.supported,
+            Err(_) => false,
+        }
+    }
+
+    // ==================== Asset Operations ====================
+
+    /// Get supported assets for a chain
+    pub async fn get_supported_assets(&self, chain_id: ChainId) -> Result<Vec<Asset>> {
+        #[derive(Deserialize)]
+        struct Response {
+            assets: Vec<Asset>,
+        }
+        let resp: Response = self.request(
+            "GET",
+            &format!("/chains/{:?}/assets", chain_id).to_lowercase(),
+            Option::<()>::None,
+        ).await?;
+        Ok(resp.assets)
+    }
+
+    /// Get asset by ID
+    pub async fn get_asset(&self, asset_id: &str) -> Result<Asset> {
+        self.request("GET", &format!("/assets/{}", urlencoding::encode(asset_id)), Option::<()>::None).await
+    }
+
+    /// Get wrapped asset mapping
+    pub async fn get_wrapped_asset(&self, original_asset_id: &str, target_chain: ChainId) -> Result<WrappedAsset> {
+        self.request(
+            "GET",
+            &format!("/assets/{}/wrapped/{:?}", urlencoding::encode(original_asset_id), target_chain).to_lowercase(),
+            Option::<()>::None,
+        ).await
+    }
+
+    /// Get all wrapped assets for a chain
+    pub async fn get_wrapped_assets(&self, chain_id: ChainId) -> Result<Vec<WrappedAsset>> {
+        #[derive(Deserialize)]
+        struct Response {
+            assets: Vec<WrappedAsset>,
+        }
+        let resp: Response = self.request(
+            "GET",
+            &format!("/chains/{:?}/wrapped", chain_id).to_lowercase(),
+            Option::<()>::None,
+        ).await?;
+        Ok(resp.assets)
+    }
+
+    // ==================== Fee & Rate Operations ====================
+
+    /// Estimate bridge fee
+    pub async fn estimate_fee(
+        &self,
+        asset: &str,
+        amount: &str,
+        source_chain: ChainId,
+        target_chain: ChainId,
+    ) -> Result<FeeEstimate> {
+        #[derive(Serialize)]
+        struct Request {
+            asset: String,
+            amount: String,
+            #[serde(rename = "sourceChain")]
+            source_chain: ChainId,
+            #[serde(rename = "targetChain")]
+            target_chain: ChainId,
+        }
+        self.request("POST", "/fees/estimate", Some(Request {
+            asset: asset.to_string(),
+            amount: amount.to_string(),
+            source_chain,
+            target_chain,
+        })).await
+    }
+
+    /// Get exchange rate between assets
+    pub async fn get_exchange_rate(&self, from_asset: &str, to_asset: &str) -> Result<ExchangeRate> {
+        self.request(
+            "GET",
+            &format!("/rates/{}/{}", urlencoding::encode(from_asset), urlencoding::encode(to_asset)),
+            Option::<()>::None,
+        ).await
+    }
+
+    // ==================== Lock-Mint Flow ====================
+
+    /// Lock assets on source chain
+    pub async fn lock(
+        &self,
+        asset: &str,
+        amount: &str,
+        target_chain: ChainId,
+        options: Option<LockOptions>,
+    ) -> Result<LockReceipt> {
+        #[derive(Serialize)]
+        struct Request {
+            asset: String,
+            amount: String,
+            #[serde(rename = "targetChain")]
+            target_chain: ChainId,
+            #[serde(flatten)]
+            options: Option<LockOptions>,
+        }
+        self.request("POST", "/transfers/lock", Some(Request {
+            asset: asset.to_string(),
+            amount: amount.to_string(),
+            target_chain,
+            options,
+        })).await
+    }
+
+    /// Get lock proof for minting
+    pub async fn get_lock_proof(&self, lock_receipt_id: &str) -> Result<LockProof> {
+        self.request(
+            "GET",
+            &format!("/transfers/lock/{}/proof", urlencoding::encode(lock_receipt_id)),
+            Option::<()>::None,
+        ).await
+    }
+
+    /// Wait for lock proof to be ready
+    pub async fn wait_for_lock_proof(
+        &self,
+        lock_receipt_id: &str,
+        poll_interval: Option<Duration>,
+        max_wait: Option<Duration>,
+    ) -> Result<LockProof> {
+        let poll_interval = poll_interval.unwrap_or(Duration::from_secs(5));
+        let max_wait = max_wait.unwrap_or(Duration::from_secs(600));
+        let deadline = std::time::Instant::now() + max_wait;
+
+        loop {
+            if std::time::Instant::now() >= deadline {
+                return Err(BridgeError::new("Timeout waiting for lock proof")
+                    .with_code("CONFIRMATIONS_PENDING"));
+            }
+
+            match self.get_lock_proof(lock_receipt_id).await {
+                Ok(proof) => return Ok(proof),
+                Err(e) if e.is_confirmations_pending() => {
+                    tokio::time::sleep(poll_interval).await;
+                }
+                Err(e) => return Err(e),
+            }
+        }
+    }
+
+    /// Mint wrapped tokens on target chain
+    pub async fn mint(
+        &self,
+        proof: &LockProof,
+        target_address: &str,
+        options: Option<MintOptions>,
+    ) -> Result<SignedTransaction> {
+        #[derive(Serialize)]
+        struct Request<'a> {
+            proof: &'a LockProof,
+            #[serde(rename = "targetAddress")]
+            target_address: String,
+            #[serde(flatten)]
+            options: Option<MintOptions>,
+        }
+        self.request("POST", "/transfers/mint", Some(Request {
+            proof,
+            target_address: target_address.to_string(),
+            options,
+        })).await
+    }
+
+    // ==================== Burn-Unlock Flow ====================
+
+    /// Burn wrapped tokens
+    pub async fn burn(
+        &self,
+        wrapped_asset: &str,
+        amount: &str,
+        options: Option<BurnOptions>,
+    ) -> Result<BurnReceipt> {
+        #[derive(Serialize)]
+        struct Request {
+            #[serde(rename = "wrappedAsset")]
+            wrapped_asset: String,
+            amount: String,
+            #[serde(flatten)]
+            options: Option<BurnOptions>,
+        }
+        self.request("POST", "/transfers/burn", Some(Request {
+            wrapped_asset: wrapped_asset.to_string(),
+            amount: amount.to_string(),
+            options,
+        })).await
+    }
+
+    /// Get burn proof for unlocking
+    pub async fn get_burn_proof(&self, burn_receipt_id: &str) -> Result<BurnProof> {
+        self.request(
+            "GET",
+            &format!("/transfers/burn/{}/proof", urlencoding::encode(burn_receipt_id)),
+            Option::<()>::None,
+        ).await
+    }
+
+    /// Wait for burn proof to be ready
+    pub async fn wait_for_burn_proof(
+        &self,
+        burn_receipt_id: &str,
+        poll_interval: Option<Duration>,
+        max_wait: Option<Duration>,
+    ) -> Result<BurnProof> {
+        let poll_interval = poll_interval.unwrap_or(Duration::from_secs(5));
+        let max_wait = max_wait.unwrap_or(Duration::from_secs(600));
+        let deadline = std::time::Instant::now() + max_wait;
+
+        loop {
+            if std::time::Instant::now() >= deadline {
+                return Err(BridgeError::new("Timeout waiting for burn proof")
+                    .with_code("CONFIRMATIONS_PENDING"));
+            }
+
+            match self.get_burn_proof(burn_receipt_id).await {
+                Ok(proof) => return Ok(proof),
+                Err(e) if e.is_confirmations_pending() => {
+                    tokio::time::sleep(poll_interval).await;
+                }
+                Err(e) => return Err(e),
+            }
+        }
+    }
+
+    /// Unlock original tokens
+    pub async fn unlock(&self, proof: &BurnProof, options: Option<UnlockOptions>) -> Result<SignedTransaction> {
+        #[derive(Serialize)]
+        struct Request<'a> {
+            proof: &'a BurnProof,
+            #[serde(flatten)]
+            options: Option<UnlockOptions>,
+        }
+        self.request("POST", "/transfers/unlock", Some(Request { proof, options })).await
+    }
+
+    // ==================== Transfer Management ====================
+
+    /// Get transfer by ID
+    pub async fn get_transfer(&self, transfer_id: &str) -> Result<Transfer> {
+        self.request(
+            "GET",
+            &format!("/transfers/{}", urlencoding::encode(transfer_id)),
+            Option::<()>::None,
+        ).await
+    }
+
+    /// Get transfer status
+    pub async fn get_transfer_status(&self, transfer_id: &str) -> Result<TransferStatus> {
+        let transfer = self.get_transfer(transfer_id).await?;
+        Ok(transfer.status)
+    }
+
+    /// List transfers
+    pub async fn list_transfers(&self, filter: Option<TransferFilter>) -> Result<Vec<Transfer>> {
+        let mut params = vec![];
+        if let Some(f) = &filter {
+            if let Some(status) = f.status {
+                params.push(format!("status={:?}", status).to_lowercase());
+            }
+            if let Some(chain) = f.source_chain {
+                params.push(format!("sourceChain={:?}", chain).to_lowercase());
+            }
+            if let Some(chain) = f.target_chain {
+                params.push(format!("targetChain={:?}", chain).to_lowercase());
+            }
+            if let Some(ref asset) = f.asset {
+                params.push(format!("asset={}", urlencoding::encode(asset)));
+            }
+            if let Some(ref sender) = f.sender {
+                params.push(format!("sender={}", urlencoding::encode(sender)));
+            }
+            if let Some(ref recipient) = f.recipient {
+                params.push(format!("recipient={}", urlencoding::encode(recipient)));
+            }
+            if let Some(from_date) = f.from_date {
+                params.push(format!("fromDate={}", from_date));
+            }
+            if let Some(to_date) = f.to_date {
+                params.push(format!("toDate={}", to_date));
+            }
+            if let Some(limit) = f.limit {
+                params.push(format!("limit={}", limit));
+            }
+            if let Some(offset) = f.offset {
+                params.push(format!("offset={}", offset));
+            }
+        }
+
+        let path = if params.is_empty() {
+            "/transfers".to_string()
+        } else {
+            format!("/transfers?{}", params.join("&"))
+        };
+
+        #[derive(Deserialize)]
+        struct Response {
+            transfers: Vec<Transfer>,
+        }
+        let resp: Response = self.request("GET", &path, Option::<()>::None).await?;
+        Ok(resp.transfers)
+    }
+
+    /// Wait for transfer to complete
+    pub async fn wait_for_transfer(
+        &self,
+        transfer_id: &str,
+        poll_interval: Option<Duration>,
+        max_wait: Option<Duration>,
+    ) -> Result<Transfer> {
+        let poll_interval = poll_interval.unwrap_or(Duration::from_secs(10));
+        let max_wait = max_wait.unwrap_or(Duration::from_secs(1800));
+        let deadline = std::time::Instant::now() + max_wait;
+
+        loop {
+            if std::time::Instant::now() >= deadline {
+                return Err(BridgeError::new("Timeout waiting for transfer completion"));
+            }
+
+            let transfer = self.get_transfer(transfer_id).await?;
+            match transfer.status {
+                TransferStatus::Completed | TransferStatus::Failed | TransferStatus::Refunded => {
+                    return Ok(transfer);
+                }
+                _ => {
+                    tokio::time::sleep(poll_interval).await;
+                }
+            }
+        }
+    }
+
+    // ==================== Convenience Methods ====================
+
+    /// Execute complete lock-mint transfer
+    pub async fn bridge_to(
+        &self,
+        asset: &str,
+        amount: &str,
+        target_chain: ChainId,
+        target_address: &str,
+        lock_options: Option<LockOptions>,
+        mint_options: Option<MintOptions>,
+    ) -> Result<Transfer> {
+        // Lock on source chain
+        let lock_receipt = self.lock(asset, amount, target_chain, lock_options).await?;
+
+        if self.config.debug {
+            eprintln!("Locked: {}, waiting for confirmations...", lock_receipt.id);
+        }
+
+        // Wait for proof
+        let proof = self.wait_for_lock_proof(&lock_receipt.id, None, None).await?;
+
+        if self.config.debug {
+            eprintln!("Proof ready, minting on {:?}...", target_chain);
+        }
+
+        // Mint on target chain
+        self.mint(&proof, target_address, mint_options).await?;
+
+        // Return final transfer status
+        self.wait_for_transfer(&lock_receipt.id, None, None).await
+    }
+
+    /// Execute complete burn-unlock transfer
+    pub async fn bridge_back(
+        &self,
+        wrapped_asset: &str,
+        amount: &str,
+        burn_options: Option<BurnOptions>,
+        unlock_options: Option<UnlockOptions>,
+    ) -> Result<Transfer> {
+        // Burn wrapped tokens
+        let burn_receipt = self.burn(wrapped_asset, amount, burn_options).await?;
+
+        if self.config.debug {
+            eprintln!("Burned: {}, waiting for confirmations...", burn_receipt.id);
+        }
+
+        // Wait for proof
+        let proof = self.wait_for_burn_proof(&burn_receipt.id, None, None).await?;
+
+        if self.config.debug {
+            eprintln!("Proof ready, unlocking on {:?}...", burn_receipt.target_chain);
+        }
+
+        // Unlock on original chain
+        self.unlock(&proof, unlock_options).await?;
+
+        // Return final transfer status
+        self.wait_for_transfer(&burn_receipt.id, None, None).await
+    }
+
+    // ==================== Lifecycle ====================
+
+    /// Close the client
+    pub fn close(&self) {
+        self.closed.store(true, Ordering::SeqCst);
+    }
+
+    /// Check if client is closed
+    pub fn is_closed(&self) -> bool {
+        self.closed.load(Ordering::SeqCst)
+    }
+
+    /// Health check
+    pub async fn health_check(&self) -> bool {
+        #[derive(Deserialize)]
+        struct Response {
+            status: String,
+        }
+        match self.request::<_, Response>("GET", "/health", Option::<()>::None).await {
+            Ok(resp) => resp.status == "healthy",
+            Err(_) => false,
+        }
+    }
+
+    async fn request<B: Serialize, R: DeserializeOwned>(
+        &self,
+        method: &str,
+        path: &str,
+        body: Option<B>,
+    ) -> Result<R> {
+        if self.is_closed() {
+            return Err(BridgeError::new("Client has been closed"));
+        }
+
+        let mut last_error = None;
+
+        for attempt in 0..self.config.retries {
+            match self.do_request(method, path, &body).await {
+                Ok(result) => return Ok(result),
+                Err(e) => {
+                    if self.config.debug {
+                        eprintln!("Attempt {} failed: {}", attempt + 1, e);
+                    }
+                    last_error = Some(e);
+                    if attempt < self.config.retries - 1 {
+                        tokio::time::sleep(Duration::from_secs((attempt + 1) as u64)).await;
+                    }
+                }
+            }
+        }
+
+        Err(last_error.unwrap_or_else(|| BridgeError::new("Unknown error after retries")))
+    }
+
+    async fn do_request<B: Serialize, R: DeserializeOwned>(
+        &self,
+        method: &str,
+        path: &str,
+        body: &Option<B>,
+    ) -> Result<R> {
+        let url = format!("{}{}", self.config.endpoint, path);
+
+        let mut request = match method {
+            "GET" => self.http_client.get(&url),
+            "POST" => self.http_client.post(&url),
+            "PUT" => self.http_client.put(&url),
+            "PATCH" => self.http_client.patch(&url),
+            "DELETE" => self.http_client.delete(&url),
+            _ => return Err(BridgeError::new(format!("Unknown method: {}", method))),
+        };
+
+        if let Some(b) = body {
+            request = request.json(b);
+        }
+
+        let response = request.send().await?;
+        let status = response.status();
+
+        if !status.is_success() {
+            let error_body: serde_json::Value = response.json().await.unwrap_or_default();
+            let message = error_body["message"]
+                .as_str()
+                .or_else(|| error_body["error"].as_str())
+                .unwrap_or(&format!("HTTP {}", status.as_u16()));
+
+            return Err(BridgeError::new(message)
+                .with_status(status.as_u16())
+                .with_code(error_body["code"].as_str().unwrap_or("").to_string()));
+        }
+
+        let result = response.json().await?;
+        Ok(result)
+    }
+}

sdk/rust/src/bridge/error.rs

@@ -0,0 +1,58 @@
+//! Bridge error types
+
+use std::fmt;
+
+/// Bridge error
+#[derive(Debug)]
+pub struct BridgeError {
+    pub message: String,
+    pub code: Option<String>,
+    pub status_code: Option<u16>,
+}
+
+impl BridgeError {
+    pub fn new(message: impl Into<String>) -> Self {
+        Self {
+            message: message.into(),
+            code: None,
+            status_code: None,
+        }
+    }
+
+    pub fn with_code(mut self, code: impl Into<String>) -> Self {
+        self.code = Some(code.into());
+        self
+    }
+
+    pub fn with_status(mut self, status: u16) -> Self {
+        self.status_code = Some(status);
+        self
+    }
+
+    pub fn is_confirmations_pending(&self) -> bool {
+        self.code.as_deref() == Some("CONFIRMATIONS_PENDING")
+    }
+}
+
+impl fmt::Display for BridgeError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.message)
+    }
+}
+
+impl std::error::Error for BridgeError {}
+
+impl From<reqwest::Error> for BridgeError {
+    fn from(err: reqwest::Error) -> Self {
+        Self::new(err.to_string())
+    }
+}
+
+impl From<serde_json::Error> for BridgeError {
+    fn from(err: serde_json::Error) -> Self {
+        Self::new(err.to_string())
+    }
+}
+
+/// Result type alias
+pub type Result<T> = std::result::Result<T, BridgeError>;

sdk/rust/src/bridge/mod.rs

@@ -0,0 +1,11 @@
+//! Synor Bridge SDK for Rust
+//!
+//! Cross-chain asset transfers with lock-mint and burn-unlock patterns.
+
+mod types;
+mod error;
+mod client;
+
+pub use types::*;
+pub use error::*;
+pub use client::*;

sdk/rust/src/bridge/types.rs

@@ -0,0 +1,368 @@
+//! Bridge types
+
+use serde::{Deserialize, Serialize};
+use std::collections::HashMap;
+
+// ==================== Chain Types ====================
+
+/// Supported blockchain networks
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Hash, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum ChainId {
+    Synor,
+    Ethereum,
+    Polygon,
+    Arbitrum,
+    Optimism,
+    #[serde(rename = "bsc")]
+    BSC,
+    Avalanche,
+    Solana,
+    Cosmos,
+}
+
+/// Native currency info
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct NativeCurrency {
+    pub name: String,
+    pub symbol: String,
+    pub decimals: u8,
+}
+
+/// Chain information
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Chain {
+    pub id: ChainId,
+    pub name: String,
+    #[serde(rename = "chainId")]
+    pub chain_id: u64,
+    #[serde(rename = "rpcUrl")]
+    pub rpc_url: String,
+    #[serde(rename = "explorerUrl")]
+    pub explorer_url: String,
+    #[serde(rename = "nativeCurrency")]
+    pub native_currency: NativeCurrency,
+    pub confirmations: u32,
+    #[serde(rename = "estimatedBlockTime")]
+    pub estimated_block_time: u32,
+    pub supported: bool,
+}
+
+// ==================== Asset Types ====================
+
+/// Asset type
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum AssetType {
+    Native,
+    #[serde(rename = "erc20")]
+    ERC20,
+    #[serde(rename = "erc721")]
+    ERC721,
+    #[serde(rename = "erc1155")]
+    ERC1155,
+}
+
+/// Asset information
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Asset {
+    pub id: String,
+    pub symbol: String,
+    pub name: String,
+    #[serde(rename = "type")]
+    pub asset_type: AssetType,
+    pub chain: ChainId,
+    #[serde(rename = "contractAddress", skip_serializing_if = "Option::is_none")]
+    pub contract_address: Option<String>,
+    pub decimals: u8,
+    #[serde(rename = "logoUrl", skip_serializing_if = "Option::is_none")]
+    pub logo_url: Option<String>,
+    #[serde(default)]
+    pub verified: bool,
+}
+
+/// Wrapped asset mapping
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct WrappedAsset {
+    #[serde(rename = "originalAsset")]
+    pub original_asset: Asset,
+    #[serde(rename = "wrappedAsset")]
+    pub wrapped_asset: Asset,
+    pub chain: ChainId,
+    #[serde(rename = "bridgeContract")]
+    pub bridge_contract: String,
+}
+
+// ==================== Transfer Types ====================
+
+/// Transfer status
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "lowercase")]
+pub enum TransferStatus {
+    Pending,
+    Locked,
+    Confirming,
+    Minting,
+    Completed,
+    Failed,
+    Refunded,
+}
+
+/// Transfer direction
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Serialize, Deserialize)]
+#[serde(rename_all = "snake_case")]
+pub enum TransferDirection {
+    LockMint,
+    BurnUnlock,
+}
+
+/// Validator signature
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ValidatorSignature {
+    pub validator: String,
+    pub signature: String,
+    pub timestamp: i64,
+}
+
+/// Lock receipt
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct LockReceipt {
+    pub id: String,
+    #[serde(rename = "txHash")]
+    pub tx_hash: String,
+    #[serde(rename = "sourceChain")]
+    pub source_chain: ChainId,
+    #[serde(rename = "targetChain")]
+    pub target_chain: ChainId,
+    pub asset: Asset,
+    pub amount: String,
+    pub sender: String,
+    pub recipient: String,
+    #[serde(rename = "lockTimestamp")]
+    pub lock_timestamp: i64,
+    pub confirmations: u32,
+    #[serde(rename = "requiredConfirmations")]
+    pub required_confirmations: u32,
+}
+
+/// Lock proof for minting
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct LockProof {
+    #[serde(rename = "lockReceipt")]
+    pub lock_receipt: LockReceipt,
+    #[serde(rename = "merkleProof")]
+    pub merkle_proof: Vec<String>,
+    #[serde(rename = "blockHeader")]
+    pub block_header: String,
+    pub signatures: Vec<ValidatorSignature>,
+}
+
+/// Burn receipt
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BurnReceipt {
+    pub id: String,
+    #[serde(rename = "txHash")]
+    pub tx_hash: String,
+    #[serde(rename = "sourceChain")]
+    pub source_chain: ChainId,
+    #[serde(rename = "targetChain")]
+    pub target_chain: ChainId,
+    #[serde(rename = "wrappedAsset")]
+    pub wrapped_asset: Asset,
+    #[serde(rename = "originalAsset")]
+    pub original_asset: Asset,
+    pub amount: String,
+    pub sender: String,
+    pub recipient: String,
+    #[serde(rename = "burnTimestamp")]
+    pub burn_timestamp: i64,
+    pub confirmations: u32,
+    #[serde(rename = "requiredConfirmations")]
+    pub required_confirmations: u32,
+}
+
+/// Burn proof for unlocking
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct BurnProof {
+    #[serde(rename = "burnReceipt")]
+    pub burn_receipt: BurnReceipt,
+    #[serde(rename = "merkleProof")]
+    pub merkle_proof: Vec<String>,
+    #[serde(rename = "blockHeader")]
+    pub block_header: String,
+    pub signatures: Vec<ValidatorSignature>,
+}
+
+/// Complete transfer record
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct Transfer {
+    pub id: String,
+    pub direction: TransferDirection,
+    pub status: TransferStatus,
+    #[serde(rename = "sourceChain")]
+    pub source_chain: ChainId,
+    #[serde(rename = "targetChain")]
+    pub target_chain: ChainId,
+    pub asset: Asset,
+    pub amount: String,
+    pub sender: String,
+    pub recipient: String,
+    #[serde(rename = "sourceTxHash", skip_serializing_if = "Option::is_none")]
+    pub source_tx_hash: Option<String>,
+    #[serde(rename = "targetTxHash", skip_serializing_if = "Option::is_none")]
+    pub target_tx_hash: Option<String>,
+    pub fee: String,
+    #[serde(rename = "feeAsset")]
+    pub fee_asset: Asset,
+    #[serde(rename = "createdAt")]
+    pub created_at: i64,
+    #[serde(rename = "updatedAt")]
+    pub updated_at: i64,
+    #[serde(rename = "completedAt", skip_serializing_if = "Option::is_none")]
+    pub completed_at: Option<i64>,
+    #[serde(rename = "errorMessage", skip_serializing_if = "Option::is_none")]
+    pub error_message: Option<String>,
+}
+
+// ==================== Fee Types ====================
+
+/// Fee estimate
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct FeeEstimate {
+    #[serde(rename = "bridgeFee")]
+    pub bridge_fee: String,
+    #[serde(rename = "gasFeeSource")]
+    pub gas_fee_source: String,
+    #[serde(rename = "gasFeeTarget")]
+    pub gas_fee_target: String,
+    #[serde(rename = "totalFee")]
+    pub total_fee: String,
+    #[serde(rename = "feeAsset")]
+    pub fee_asset: Asset,
+    #[serde(rename = "estimatedTime")]
+    pub estimated_time: u32,
+    #[serde(rename = "exchangeRate", skip_serializing_if = "Option::is_none")]
+    pub exchange_rate: Option<String>,
+}
+
+/// Exchange rate
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct ExchangeRate {
+    #[serde(rename = "fromAsset")]
+    pub from_asset: Asset,
+    #[serde(rename = "toAsset")]
+    pub to_asset: Asset,
+    pub rate: String,
+    #[serde(rename = "inverseRate")]
+    pub inverse_rate: String,
+    #[serde(rename = "lastUpdated")]
+    pub last_updated: i64,
+    pub source: String,
+}
+
+// ==================== Transaction Types ====================
+
+/// Signed transaction
+#[derive(Debug, Clone, Serialize, Deserialize)]
+pub struct SignedTransaction {
+    #[serde(rename = "txHash")]
+    pub tx_hash: String,
+    pub chain: ChainId,
+    pub from: String,
+    pub to: String,
+    pub value: String,
+    pub data: String,
+    #[serde(rename = "gasLimit")]
+    pub gas_limit: String,
+    #[serde(rename = "gasPrice", skip_serializing_if = "Option::is_none")]
+    pub gas_price: Option<String>,
+    #[serde(rename = "maxFeePerGas", skip_serializing_if = "Option::is_none")]
+    pub max_fee_per_gas: Option<String>,
+    #[serde(rename = "maxPriorityFeePerGas", skip_serializing_if = "Option::is_none")]
+    pub max_priority_fee_per_gas: Option<String>,
+    pub nonce: u64,
+    pub signature: String,
+}
+
+// ==================== Filter Types ====================
+
+/// Transfer filter
+#[derive(Debug, Clone, Default)]
+pub struct TransferFilter {
+    pub status: Option<TransferStatus>,
+    pub source_chain: Option<ChainId>,
+    pub target_chain: Option<ChainId>,
+    pub asset: Option<String>,
+    pub sender: Option<String>,
+    pub recipient: Option<String>,
+    pub from_date: Option<i64>,
+    pub to_date: Option<i64>,
+    pub limit: Option<u32>,
+    pub offset: Option<u32>,
+}
+
+// ==================== Options Types ====================
+
+/// Lock options
+#[derive(Debug, Clone, Default, Serialize)]
+pub struct LockOptions {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub recipient: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub deadline: Option<i64>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub slippage: Option<f64>,
+}
+
+/// Mint options
+#[derive(Debug, Clone, Default, Serialize)]
+pub struct MintOptions {
+    #[serde(rename = "gasLimit", skip_serializing_if = "Option::is_none")]
+    pub gas_limit: Option<String>,
+    #[serde(rename = "maxFeePerGas", skip_serializing_if = "Option::is_none")]
+    pub max_fee_per_gas: Option<String>,
+    #[serde(rename = "maxPriorityFeePerGas", skip_serializing_if = "Option::is_none")]
+    pub max_priority_fee_per_gas: Option<String>,
+}
+
+/// Burn options
+#[derive(Debug, Clone, Default, Serialize)]
+pub struct BurnOptions {
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub recipient: Option<String>,
+    #[serde(skip_serializing_if = "Option::is_none")]
+    pub deadline: Option<i64>,
+}
+
+/// Unlock options
+#[derive(Debug, Clone, Default, Serialize)]
+pub struct UnlockOptions {
+    #[serde(rename = "gasLimit", skip_serializing_if = "Option::is_none")]
+    pub gas_limit: Option<String>,
+    #[serde(rename = "gasPrice", skip_serializing_if = "Option::is_none")]
+    pub gas_price: Option<String>,
+}
+
+// ==================== Config Types ====================
+
+/// Bridge configuration
+#[derive(Debug, Clone)]
+pub struct BridgeConfig {
+    pub api_key: String,
+    pub endpoint: String,
+    pub timeout_secs: u64,
+    pub retries: u32,
+    pub debug: bool,
+}
+
+impl Default for BridgeConfig {
+    fn default() -> Self {
+        Self {
+            api_key: String::new(),
+            endpoint: "https://bridge.synor.io/v1".to_string(),
+            timeout_secs: 60,
+            retries: 3,
+            debug: false,
+        }
+    }
+}

sdk/rust/src/database/client.rs

@@ -0,0 +1,543 @@
+//! Database client implementation
+
+use reqwest::header::{HeaderMap, HeaderValue, AUTHORIZATION, CONTENT_TYPE};
+use serde::{de::DeserializeOwned, Serialize};
+use std::sync::atomic::{AtomicBool, Ordering};
+use std::sync::Arc;
+use std::time::Duration;
+
+use super::error::{DatabaseError, Result};
+use super::types::*;
+
+/// Synor Database Client
+pub struct Client {
+    config: Config,
+    http_client: reqwest::Client,
+    closed: Arc<AtomicBool>,
+}
+
+impl Client {
+    /// Create a new database client
+    pub fn new(config: Config) -> Self {
+        let mut headers = HeaderMap::new();
+        headers.insert(
+            AUTHORIZATION,
+            HeaderValue::from_str(&format!("Bearer {}", config.api_key)).unwrap(),
+        );
+        headers.insert(CONTENT_TYPE, HeaderValue::from_static("application/json"));
+        headers.insert("X-SDK-Version", HeaderValue::from_static("rust/0.1.0"));
+
+        let http_client = reqwest::Client::builder()
+            .default_headers(headers)
+            .timeout(Duration::from_secs(config.timeout_secs))
+            .build()
+            .expect("Failed to create HTTP client");
+
+        Self {
+            config,
+            http_client,
+            closed: Arc::new(AtomicBool::new(false)),
+        }
+    }
+
+    /// Get the key-value store
+    pub fn kv(&self) -> KeyValueStore<'_> {
+        KeyValueStore { client: self }
+    }
+
+    /// Get the document store
+    pub fn documents(&self) -> DocumentStore<'_> {
+        DocumentStore { client: self }
+    }
+
+    /// Get the vector store
+    pub fn vectors(&self) -> VectorStore<'_> {
+        VectorStore { client: self }
+    }
+
+    /// Get the time series store
+    pub fn timeseries(&self) -> TimeSeriesStore<'_> {
+        TimeSeriesStore { client: self }
+    }
+
+    /// Get database statistics
+    pub async fn get_stats(&self) -> Result<DatabaseStats> {
+        self.request("GET", "/stats", Option::<()>::None).await
+    }
+
+    /// Health check
+    pub async fn health_check(&self) -> bool {
+        #[derive(serde::Deserialize)]
+        struct HealthResponse {
+            status: String,
+        }
+
+        match self.request::<_, HealthResponse>("GET", "/health", Option::<()>::None).await {
+            Ok(resp) => resp.status == "healthy",
+            Err(_) => false,
+        }
+    }
+
+    /// Close the client
+    pub fn close(&self) {
+        self.closed.store(true, Ordering::SeqCst);
+    }
+
+    /// Check if client is closed
+    pub fn is_closed(&self) -> bool {
+        self.closed.load(Ordering::SeqCst)
+    }
+
+    async fn request<B: Serialize, R: DeserializeOwned>(
+        &self,
+        method: &str,
+        path: &str,
+        body: Option<B>,
+    ) -> Result<R> {
+        if self.is_closed() {
+            return Err(DatabaseError::new("Client has been closed"));
+        }
+
+        let mut last_error = None;
+
+        for attempt in 0..self.config.retries {
+            match self.do_request(method, path, &body).await {
+                Ok(result) => return Ok(result),
+                Err(e) => {
+                    if self.config.debug {
+                        eprintln!("Attempt {} failed: {}", attempt + 1, e);
+                    }
+                    last_error = Some(e);
+                    if attempt < self.config.retries - 1 {
+                        tokio::time::sleep(Duration::from_secs((attempt + 1) as u64)).await;
+                    }
+                }
+            }
+        }
+
+        Err(last_error.unwrap_or_else(|| DatabaseError::new("Unknown error after retries")))
+    }
+
+    async fn do_request<B: Serialize, R: DeserializeOwned>(
+        &self,
+        method: &str,
+        path: &str,
+        body: &Option<B>,
+    ) -> Result<R> {
+        let url = format!("{}{}", self.config.endpoint, path);
+
+        let mut request = match method {
+            "GET" => self.http_client.get(&url),
+            "POST" => self.http_client.post(&url),
+            "PUT" => self.http_client.put(&url),
+            "PATCH" => self.http_client.patch(&url),
+            "DELETE" => self.http_client.delete(&url),
+            _ => return Err(DatabaseError::new(format!("Unknown method: {}", method))),
+        };
+
+        if let Some(b) = body {
+            request = request.json(b);
+        }
+
+        let response = request.send().await?;
+        let status = response.status();
+
+        if !status.is_success() {
+            let error_body: serde_json::Value = response.json().await.unwrap_or_default();
+            let message = error_body["message"]
+                .as_str()
+                .or_else(|| error_body["error"].as_str())
+                .unwrap_or(&format!("HTTP {}", status.as_u16()));
+
+            return Err(DatabaseError::new(message)
+                .with_status(status.as_u16())
+                .with_code(error_body["code"].as_str().unwrap_or("").to_string()));
+        }
+
+        let result = response.json().await?;
+        Ok(result)
+    }
+}
+
+/// Key-Value store operations
+pub struct KeyValueStore<'a> {
+    client: &'a Client,
+}
+
+impl<'a> KeyValueStore<'a> {
+    /// Get a value by key
+    pub async fn get<T: DeserializeOwned>(&self, key: &str) -> Result<Option<T>> {
+        #[derive(serde::Deserialize)]
+        struct Response<T> {
+            value: Option<T>,
+        }
+
+        let path = format!("/kv/{}", urlencoding::encode(key));
+        let resp: Response<T> = self.client.request("GET", &path, Option::<()>::None).await?;
+        Ok(resp.value)
+    }
+
+    /// Get a full entry with metadata
+    pub async fn get_entry<T: DeserializeOwned>(&self, key: &str) -> Result<Option<KeyValueEntry<T>>> {
+        let path = format!("/kv/{}/entry", urlencoding::encode(key));
+        self.client.request("GET", &path, Option::<()>::None).await
+    }
+
+    /// Set a value
+    pub async fn set<T: Serialize>(&self, key: &str, value: T, options: Option<SetOptions>) -> Result<()> {
+        #[derive(Serialize)]
+        struct SetRequest<T> {
+            value: T,
+            #[serde(flatten)]
+            options: Option<SetOptions>,
+        }
+
+        let path = format!("/kv/{}", urlencoding::encode(key));
+        let body = SetRequest { value, options };
+        self.client.request::<_, serde_json::Value>("PUT", &path, Some(body)).await?;
+        Ok(())
+    }
+
+    /// Delete a key
+    pub async fn delete(&self, key: &str) -> Result<bool> {
+        #[derive(serde::Deserialize)]
+        struct Response {
+            deleted: bool,
+        }
+
+        let path = format!("/kv/{}", urlencoding::encode(key));
+        let resp: Response = self.client.request("DELETE", &path, Option::<()>::None).await?;
+        Ok(resp.deleted)
+    }
+
+    /// Check if a key exists
+    pub async fn exists(&self, key: &str) -> Result<bool> {
+        #[derive(serde::Deserialize)]
+        struct Response {
+            exists: bool,
+        }
+
+        let path = format!("/kv/{}/exists", urlencoding::encode(key));
+        let resp: Response = self.client.request("GET", &path, Option::<()>::None).await?;
+        Ok(resp.exists)
+    }
+
+    /// List keys
+    pub async fn list<T: DeserializeOwned>(&self, options: Option<ListOptions>) -> Result<ListResult<T>> {
+        let mut path = "/kv".to_string();
+        if let Some(opts) = &options {
+            let mut params = vec![];
+            if let Some(prefix) = &opts.prefix {
+                params.push(format!("prefix={}", urlencoding::encode(prefix)));
+            }
+            if let Some(cursor) = &opts.cursor {
+                params.push(format!("cursor={}", urlencoding::encode(cursor)));
+            }
+            if let Some(limit) = opts.limit {
+                params.push(format!("limit={}", limit));
+            }
+            if !params.is_empty() {
+                path = format!("{}?{}", path, params.join("&"));
+            }
+        }
+
+        self.client.request("GET", &path, Option::<()>::None).await
+    }
+
+    /// Increment a numeric value
+    pub async fn incr(&self, key: &str, by: i64) -> Result<i64> {
+        #[derive(Serialize)]
+        struct IncrRequest {
+            by: i64,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct Response {
+            value: i64,
+        }
+
+        let path = format!("/kv/{}/incr", urlencoding::encode(key));
+        let resp: Response = self.client.request("POST", &path, Some(IncrRequest { by })).await?;
+        Ok(resp.value)
+    }
+}
+
+/// Document store operations
+pub struct DocumentStore<'a> {
+    client: &'a Client,
+}
+
+impl<'a> DocumentStore<'a> {
+    /// Create a new document
+    pub async fn create<T: Serialize + DeserializeOwned>(
+        &self,
+        collection: &str,
+        data: T,
+        options: Option<CreateDocumentOptions>,
+    ) -> Result<Document<T>> {
+        #[derive(Serialize)]
+        struct CreateRequest<T> {
+            data: T,
+            #[serde(flatten)]
+            options: Option<CreateDocumentOptions>,
+        }
+
+        let path = format!("/documents/{}", urlencoding::encode(collection));
+        let body = CreateRequest { data, options };
+        self.client.request("POST", &path, Some(body)).await
+    }
+
+    /// Get a document by ID
+    pub async fn get<T: DeserializeOwned>(&self, collection: &str, id: &str) -> Result<Option<Document<T>>> {
+        let path = format!("/documents/{}/{}", urlencoding::encode(collection), urlencoding::encode(id));
+        self.client.request("GET", &path, Option::<()>::None).await
+    }
+
+    /// Update a document
+    pub async fn update<T: Serialize + DeserializeOwned>(
+        &self,
+        collection: &str,
+        id: &str,
+        update: T,
+        options: Option<UpdateDocumentOptions>,
+    ) -> Result<Document<T>> {
+        #[derive(Serialize)]
+        struct UpdateRequest<T> {
+            update: T,
+            #[serde(flatten)]
+            options: Option<UpdateDocumentOptions>,
+        }
+
+        let path = format!("/documents/{}/{}", urlencoding::encode(collection), urlencoding::encode(id));
+        let body = UpdateRequest { update, options };
+        self.client.request("PATCH", &path, Some(body)).await
+    }
+
+    /// Delete a document
+    pub async fn delete(&self, collection: &str, id: &str) -> Result<bool> {
+        #[derive(serde::Deserialize)]
+        struct Response {
+            deleted: bool,
+        }
+
+        let path = format!("/documents/{}/{}", urlencoding::encode(collection), urlencoding::encode(id));
+        let resp: Response = self.client.request("DELETE", &path, Option::<()>::None).await?;
+        Ok(resp.deleted)
+    }
+
+    /// Query documents
+    pub async fn query<T: DeserializeOwned>(&self, collection: &str, options: Option<QueryOptions>) -> Result<QueryResult<T>> {
+        let path = format!("/documents/{}/query", urlencoding::encode(collection));
+        self.client.request("POST", &path, options.or(Some(QueryOptions::default()))).await
+    }
+
+    /// Count documents
+    pub async fn count(&self, collection: &str, filter: Option<serde_json::Value>) -> Result<u64> {
+        #[derive(Serialize)]
+        struct CountRequest {
+            filter: Option<serde_json::Value>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct Response {
+            count: u64,
+        }
+
+        let path = format!("/documents/{}/count", urlencoding::encode(collection));
+        let resp: Response = self.client.request("POST", &path, Some(CountRequest { filter })).await?;
+        Ok(resp.count)
+    }
+}
+
+/// Vector store operations
+pub struct VectorStore<'a> {
+    client: &'a Client,
+}
+
+impl<'a> VectorStore<'a> {
+    /// Create a vector collection
+    pub async fn create_collection(&self, config: VectorCollectionConfig) -> Result<()> {
+        self.client.request::<_, serde_json::Value>("POST", "/vectors/collections", Some(config)).await?;
+        Ok(())
+    }
+
+    /// Delete a vector collection
+    pub async fn delete_collection(&self, name: &str) -> Result<()> {
+        let path = format!("/vectors/collections/{}", urlencoding::encode(name));
+        self.client.request::<_, serde_json::Value>("DELETE", &path, Option::<()>::None).await?;
+        Ok(())
+    }
+
+    /// Upsert vectors
+    pub async fn upsert(
+        &self,
+        collection: &str,
+        vectors: Vec<VectorEntry>,
+        options: Option<UpsertVectorOptions>,
+    ) -> Result<u64> {
+        #[derive(Serialize)]
+        struct UpsertRequest {
+            vectors: Vec<VectorEntry>,
+            #[serde(flatten)]
+            options: Option<UpsertVectorOptions>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct Response {
+            upserted: u64,
+        }
+
+        let path = format!("/vectors/{}/upsert", urlencoding::encode(collection));
+        let resp: Response = self.client.request("POST", &path, Some(UpsertRequest { vectors, options })).await?;
+        Ok(resp.upserted)
+    }
+
+    /// Search for similar vectors
+    pub async fn search(
+        &self,
+        collection: &str,
+        vector: Vec<f64>,
+        options: Option<SearchOptions>,
+    ) -> Result<Vec<SearchResult>> {
+        #[derive(Serialize)]
+        struct SearchRequest {
+            vector: Vec<f64>,
+            #[serde(flatten)]
+            options: Option<SearchOptions>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct Response {
+            results: Vec<SearchResult>,
+        }
+
+        let path = format!("/vectors/{}/search", urlencoding::encode(collection));
+        let resp: Response = self.client.request("POST", &path, Some(SearchRequest { vector, options })).await?;
+        Ok(resp.results)
+    }
+
+    /// Delete vectors by ID
+    pub async fn delete(&self, collection: &str, ids: Vec<String>, namespace: Option<String>) -> Result<u64> {
+        #[derive(Serialize)]
+        struct DeleteRequest {
+            ids: Vec<String>,
+            #[serde(skip_serializing_if = "Option::is_none")]
+            namespace: Option<String>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct Response {
+            deleted: u64,
+        }
+
+        let path = format!("/vectors/{}/delete", urlencoding::encode(collection));
+        let resp: Response = self.client.request("POST", &path, Some(DeleteRequest { ids, namespace })).await?;
+        Ok(resp.deleted)
+    }
+}
+
+/// Time series store operations
+pub struct TimeSeriesStore<'a> {
+    client: &'a Client,
+}
+
+impl<'a> TimeSeriesStore<'a> {
+    /// Write data points
+    pub async fn write(
+        &self,
+        series: &str,
+        points: Vec<DataPoint>,
+        options: Option<WritePointsOptions>,
+    ) -> Result<u64> {
+        #[derive(Serialize)]
+        struct WriteRequest {
+            points: Vec<DataPoint>,
+            #[serde(flatten)]
+            options: Option<WritePointsOptions>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct Response {
+            written: u64,
+        }
+
+        let path = format!("/timeseries/{}/write", urlencoding::encode(series));
+        let resp: Response = self.client.request("POST", &path, Some(WriteRequest { points, options })).await?;
+        Ok(resp.written)
+    }
+
+    /// Query a time series
+    pub async fn query(
+        &self,
+        series: &str,
+        range: TimeRange,
+        options: Option<TimeSeriesQueryOptions>,
+    ) -> Result<TimeSeriesResult> {
+        #[derive(Serialize)]
+        struct QueryRequest {
+            range: TimeRange,
+            #[serde(flatten)]
+            options: Option<TimeSeriesQueryOptions>,
+        }
+
+        let path = format!("/timeseries/{}/query", urlencoding::encode(series));
+        self.client.request("POST", &path, Some(QueryRequest { range, options })).await
+    }
+
+    /// Delete data points
+    pub async fn delete(
+        &self,
+        series: &str,
+        range: TimeRange,
+        tags: Option<std::collections::HashMap<String, String>>,
+    ) -> Result<u64> {
+        #[derive(Serialize)]
+        struct DeleteRequest {
+            range: TimeRange,
+            #[serde(skip_serializing_if = "Option::is_none")]
+            tags: Option<std::collections::HashMap<String, String>>,
+        }
+
+        #[derive(serde::Deserialize)]
+        struct Response {
+            deleted: u64,
+        }
+
+        let path = format!("/timeseries/{}/delete", urlencoding::encode(series));
+        let resp: Response = self.client.request("POST", &path, Some(DeleteRequest { range, tags })).await?;
+        Ok(resp.deleted)
+    }
+
+    /// Get series info
+    pub async fn get_series_info(&self, series: &str) -> Result<SeriesInfo> {
+        let path = format!("/timeseries/{}/info", urlencoding::encode(series));
+        self.client.request("GET", &path, Option::<()>::None).await
+    }
+
+    /// List all series
+    pub async fn list_series(&self, prefix: Option<&str>) -> Result<Vec<SeriesInfo>> {
+        #[derive(serde::Deserialize)]
+        struct Response {
+            series: Vec<SeriesInfo>,
+        }
+
+        let path = match prefix {
+            Some(p) => format!("/timeseries?prefix={}", urlencoding::encode(p)),
+            None => "/timeseries".to_string(),
+        };
+        let resp: Response = self.client.request("GET", &path, Option::<()>::None).await?;
+        Ok(resp.series)
+    }
+
+    /// Set retention policy
+    pub async fn set_retention(&self, series: &str, retention_days: i32) -> Result<()> {
+        #[derive(Serialize)]
+        struct Request {
+            retention_days: i32,
+        }
+
+        let path = format!("/timeseries/{}/retention", urlencoding::encode(series));
+        self.client.request::<_, serde_json::Value>("PUT", &path, Some(Request { retention_days })).await?;
+        Ok(())
+    }
+}

sdk/rust/src/database/error.rs

@@ -0,0 +1,54 @@
+//! Database error types
+
+use std::fmt;
+
+/// Database error
+#[derive(Debug)]
+pub struct DatabaseError {
+    pub message: String,
+    pub code: Option<String>,
+    pub status_code: Option<u16>,
+}
+
+impl DatabaseError {
+    pub fn new(message: impl Into<String>) -> Self {
+        Self {
+            message: message.into(),
+            code: None,
+            status_code: None,
+        }
+    }
+
+    pub fn with_code(mut self, code: impl Into<String>) -> Self {
+        self.code = Some(code.into());
+        self
+    }
+
+    pub fn with_status(mut self, status: u16) -> Self {
+        self.status_code = Some(status);
+        self
+    }
+}
+
+impl fmt::Display for DatabaseError {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.message)
+    }
+}
+
+impl std::error::Error for DatabaseError {}
+
+impl From<reqwest::Error> for DatabaseError {
+    fn from(err: reqwest::Error) -> Self {
+        Self::new(err.to_string())
+    }
+}
+
+impl From<serde_json::Error> for DatabaseError {
+    fn from(err: serde_json::Error) -> Self {
+        Self::new(err.to_string())
+    }
+}
+
+/// Result type alias
+pub type Result<T> = std::result::Result<T, DatabaseError>;

sdk/rust/src/database/mod.rs

@@ -0,0 +1,37 @@
+//! Synor Database SDK for Rust
+//!
+//! Multi-model database: Key-Value, Document, Vector, and Time Series.
+//!
+//! # Example
+//!
+//! ```rust,no_run
+//! use synor_sdk::database::{Client, Config};
+//!
+//! #[tokio::main]
+//! async fn main() -> Result<(), Box<dyn std::error::Error>> {
+//!     let client = Client::new(Config {
+//!         api_key: "your-api-key".to_string(),
+//!         ..Default::default()
+//!     });
+//!
+//!     // Key-Value operations
+//!     client.kv().set("user:1", serde_json::json!({"name": "Alice"}), None).await?;
+//!     let user = client.kv().get::<serde_json::Value>("user:1").await?;
+//!
+//!     // Document operations
+//!     let doc = client.documents().create("users", serde_json::json!({"name": "Bob"}), None).await?;
+//!
+//!     // Vector operations
+//!     client.vectors().upsert("embeddings", vec![VectorEntry { id: "1".into(), vector: vec![0.1, 0.2], ..Default::default() }], None).await?;
+//!
+//!     Ok(())
+//! }
+//! ```
+
+mod types;
+mod error;
+mod client;
+
+pub use types::*;
+pub use error::*;
+pub use client::*;