Fixing whitelist and blacklist functionality

.gitignore

@@ -8,4 +8,5 @@ src/version.h
 dev-config/
 db/
 copy_executable_local.sh
-nostr_login_lite/
+nostr_login_lite/
+style_guide/

AGENTS.md

@@ -48,20 +48,30 @@
 - Schema version 4 with JSON tag storage
 - **Critical**: Event expiration filtering done at application level, not SQL level
 
-### Configuration Event Structure
+### Admin API Event Structure
 ```json
 {
-  "kind": 23455,
-  "content": "C Nostr Relay Configuration",
+  "kind": 23456,
+  "content": "base64_nip44_encrypted_command_array",
   "tags": [
-    ["d", "<relay_pubkey>"],
-    ["relay_description", "value"],
-    ["max_subscriptions_per_client", "25"],
-    ["pow_min_difficulty", "16"]
+    ["p", "<relay_pubkey>"]
   ]
 }
 ```
 
+**Configuration Commands** (encrypted in content):
+- `["relay_description", "My Relay"]`
+- `["max_subscriptions_per_client", "25"]`
+- `["pow_min_difficulty", "16"]`
+
+**Auth Rule Commands** (encrypted in content):
+- `["blacklist", "pubkey", "hex_pubkey_value"]`
+- `["whitelist", "pubkey", "hex_pubkey_value"]`
+
+**Query Commands** (encrypted in content):
+- `["auth_query", "all"]`
+- `["system_command", "system_status"]`
+
 ### Process Management
 ```bash
 # Kill existing relay processes

IMPLEMENT_API.md

@@ -1,513 +0,0 @@
-# Implementation Plan: Enhanced Admin Event API Structure
-
-## Current Issue
-
-The current admin event routing at [`main.c:3248-3268`](src/main.c:3248) has a security vulnerability:
-
-```c
-if (event_kind == 23455 || event_kind == 23456) {
-    // Admin event processing
-    int admin_result = process_admin_event_in_config(event, admin_error, sizeof(admin_error), wsi);
-} else {
-    // Regular event storage and broadcasting
-}
-```
-
-**Problem**: Any event with these kinds gets routed to admin processing, regardless of authorization. This allows unauthorized users to send admin events that could be processed as legitimate admin commands.
-
-**Note**: Event kinds 33334 and 33335 are no longer used and have been removed from the admin event routing.
-
-## Required Security Enhancement
-
-Admin events must be validated for proper authorization BEFORE routing to admin processing:
-
-1. **Relay Public Key Check**: Event must have a `p` tag equal to the relay's public key
-2. **Admin Signature Check**: Event must be signed by an authorized admin private key
-3. **Fallback to Regular Processing**: If authorization fails, treat as regular event (not admin event)
-
-## Implementation Plan
-
-### Phase 1: Add Admin Authorization Validation
-
-#### 1.1 Create Consolidated Admin Authorization Function
-**Location**: [`src/main.c`](src/main.c) or [`src/config.c`](src/config.c)
-
-```c
-/**
- * Consolidated admin event authorization validator
- * Implements defense-in-depth security for admin events
- *
- * @param event - The event to validate for admin authorization
- * @param error_message - Buffer for detailed error messages
- * @param error_size - Size of error message buffer
- * @return 0 if authorized, -1 if unauthorized, -2 if validation error
- */
-int is_authorized_admin_event(cJSON* event, char* error_message, size_t error_size) {
-    if (!event) {
-        snprintf(error_message, error_size, "admin_auth: null event");
-        return -2;
-    }
-    
-    // Extract event components
-    cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
-    cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
-    cJSON* tags_obj = cJSON_GetObjectItem(event, "tags");
-    
-    if (!kind_obj || !pubkey_obj || !tags_obj) {
-        snprintf(error_message, error_size, "admin_auth: missing required fields");
-        return -2;
-    }
-    
-    // Validation Layer 1: Kind Check
-    int event_kind = (int)cJSON_GetNumberValue(kind_obj);
-    if (event_kind != 23455 && event_kind != 23456) {
-        snprintf(error_message, error_size, "admin_auth: not an admin event kind");
-        return -1;
-    }
-    
-    // Validation Layer 2: Relay Targeting Check
-    const char* relay_pubkey = get_config_value("relay_pubkey");
-    if (!relay_pubkey) {
-        snprintf(error_message, error_size, "admin_auth: relay pubkey not configured");
-        return -2;
-    }
-    
-    // Check for 'p' tag targeting this relay
-    int has_relay_target = 0;
-    if (cJSON_IsArray(tags_obj)) {
-        cJSON* tag = NULL;
-        cJSON_ArrayForEach(tag, tags_obj) {
-            if (cJSON_IsArray(tag) && cJSON_GetArraySize(tag) >= 2) {
-                cJSON* tag_name = cJSON_GetArrayItem(tag, 0);
-                cJSON* tag_value = cJSON_GetArrayItem(tag, 1);
-                
-                if (cJSON_IsString(tag_name) && cJSON_IsString(tag_value)) {
-                    const char* name = cJSON_GetStringValue(tag_name);
-                    const char* value = cJSON_GetStringValue(tag_value);
-                    
-                    if (strcmp(name, "p") == 0 && strcmp(value, relay_pubkey) == 0) {
-                        has_relay_target = 1;
-                        break;
-                    }
-                }
-            }
-        }
-    }
-    
-    if (!has_relay_target) {
-        // Admin event for different relay - not unauthorized, just not for us
-        snprintf(error_message, error_size, "admin_auth: admin event for different relay");
-        return -1;
-    }
-    
-    // Validation Layer 3: Admin Signature Check (only if targeting this relay)
-    const char* event_pubkey = cJSON_GetStringValue(pubkey_obj);
-    if (!event_pubkey) {
-        snprintf(error_message, error_size, "admin_auth: invalid pubkey format");
-        return -2;
-    }
-    
-    const char* admin_pubkey = get_config_value("admin_pubkey");
-    if (!admin_pubkey || strcmp(event_pubkey, admin_pubkey) != 0) {
-        // This is the ONLY case where we log as "Unauthorized admin event attempt"
-        // because it's targeting THIS relay but from wrong admin
-        snprintf(error_message, error_size, "admin_auth: unauthorized admin for this relay");
-        log_warning("SECURITY: Unauthorized admin event attempt for this relay");
-        return -1;
-    }
-    
-    // All validation layers passed
-    log_info("ADMIN: Admin event authorized");
-    return 0;
-}
-
-```
-
-#### 1.2 Update Event Routing Logic
-**Location**: [`main.c:3248`](src/main.c:3248)
-
-```c
-// Current problematic code:
-if (event_kind == 23455 || event_kind == 23456) {
-    // Admin event processing
-    int admin_result = process_admin_event_in_config(event, admin_error, sizeof(admin_error), wsi);
-} else {
-    // Regular event storage and broadcasting
-}
-
-// Enhanced secure code with consolidated authorization:
-if (result == 0) {
-    cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
-    if (kind_obj && cJSON_IsNumber(kind_obj)) {
-        int event_kind = (int)cJSON_GetNumberValue(kind_obj);
-        
-        // Check if this is an admin event
-        if (event_kind == 23455 || event_kind == 23456) {
-            // Use consolidated authorization check
-            char auth_error[512] = {0};
-            int auth_result = is_authorized_admin_event(event, auth_error, sizeof(auth_error));
-            
-            if (auth_result == 0) {
-                // Authorized admin event - process through admin API
-                char admin_error[512] = {0};
-                int admin_result = process_admin_event_in_config(event, admin_error, sizeof(admin_error), wsi);
-                
-                if (admin_result != 0) {
-                    result = -1;
-                    strncpy(error_message, admin_error, sizeof(error_message) - 1);
-                }
-                // Admin events are NOT broadcast to subscriptions
-            } else {
-                // Unauthorized admin event - treat as regular event
-                log_warning("Unauthorized admin event treated as regular event");
-                if (store_event(event) != 0) {
-                    result = -1;
-                    strncpy(error_message, "error: failed to store event", sizeof(error_message) - 1);
-                } else {
-                    broadcast_event_to_subscriptions(event);
-                }
-            }
-        } else {
-            // Regular event - normal processing
-            if (store_event(event) != 0) {
-                result = -1;
-                strncpy(error_message, "error: failed to store event", sizeof(error_message) - 1);
-            } else {
-                broadcast_event_to_subscriptions(event);
-            }
-        }
-    }
-}
-```
-
-### Phase 2: Enhanced Admin Event Processing
-
-#### 2.1 Admin Event Validation in Config System
-**Location**: [`src/config.c`](src/config.c) - [`process_admin_event_in_config()`](src/config.c:2065)
-
-Add additional validation within the admin processing function:
-
-```c
-int process_admin_event_in_config(cJSON* event, char* error_buffer, size_t error_buffer_size, struct lws* wsi) {
-    // Double-check authorization (defense in depth)
-    if (!is_authorized_admin_event(event)) {
-        snprintf(error_buffer, error_buffer_size, "unauthorized: not a valid admin event");
-        return -1;
-    }
-    
-    // Continue with existing admin event processing...
-    // ... rest of function unchanged
-}
-```
-
-#### 2.2 Logging and Monitoring
-Add comprehensive logging for admin event attempts:
-
-```c
-// In the routing logic - enhanced logging
-cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
-cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
-int event_kind = kind_obj ? cJSON_GetNumberValue(kind_obj) : -1;
-const char* event_pubkey = pubkey_obj ? cJSON_GetStringValue(pubkey_obj) : "unknown";
-
-if (is_authorized_admin_event(event)) {
-    char log_msg[256];
-    snprintf(log_msg, sizeof(log_msg),
-            "ADMIN EVENT: Authorized admin event (kind=%d) from pubkey=%.16s...",
-            event_kind, event_pubkey);
-    log_info(log_msg);
-} else if (event_kind == 23455 || event_kind == 23456) {
-    // This catches unauthorized admin event attempts
-    char log_msg[256];
-    snprintf(log_msg, sizeof(log_msg),
-            "SECURITY: Unauthorized admin event attempt (kind=%d) from pubkey=%.16s...",
-            event_kind, event_pubkey);
-    log_warning(log_msg);
-}
-```
-
-## Phase 3: Unified Output Flow Architecture
-
-### 3.1 Current Output Flow Analysis
-
-After analyzing both [`main.c`](src/main.c) and [`config.c`](src/config.c), the **admin event responses already flow through the standard WebSocket output pipeline**. This is the correct architecture and requires no changes.
-
-#### Standard WebSocket Output Pipeline
-
-**Regular Events** ([`main.c:2978-2996`](src/main.c:2978)):
-```c
-// Database query responses
-unsigned char* buf = malloc(LWS_PRE + msg_len);
-memcpy(buf + LWS_PRE, msg_str, msg_len);
-lws_write(wsi, buf + LWS_PRE, msg_len, LWS_WRITE_TEXT);
-free(buf);
-```
-
-**OK Responses** ([`main.c:3342-3375`](src/main.c:3342)):
-```c
-// Event processing results: ["OK", event_id, success_boolean, message]
-unsigned char *buf = malloc(LWS_PRE + response_len);
-memcpy(buf + LWS_PRE, response_str, response_len);
-lws_write(wsi, buf + LWS_PRE, response_len, LWS_WRITE_TEXT);
-free(buf);
-```
-
-#### Admin Event Output Pipeline (Already Unified)
-
-**Admin Responses** ([`config.c:2363-2414`](src/config.c:2363)):
-```c
-// Admin query responses use IDENTICAL pattern
-int send_websocket_response_data(struct lws* wsi, cJSON* response_data) {
-    unsigned char* buf = malloc(LWS_PRE + response_len);
-    memcpy(buf + LWS_PRE, response_str, response_len);
-    
-    // Same lws_write() call as regular events
-    int result = lws_write(wsi, buf + LWS_PRE, response_len, LWS_WRITE_TEXT);
-    
-    free(buf);
-    return result;
-}
-```
-
-### 3.2 Unified Output Flow Confirmation
-
-✅ **Admin responses already use the same WebSocket transmission mechanism as regular events**
-
-✅ **Both admin and regular events use identical buffer allocation patterns**
-
-✅ **Both admin and regular events use the same [`lws_write()`](src/config.c:2393) function**
-
-✅ **Both admin and regular events follow the same cleanup patterns**
-
-### 3.3 Output Flow Integration Points
-
-The admin event processing in [`config.c:2436`](src/config.c:2436) already integrates correctly with the unified output system:
-
-1. **Admin Query Processing** ([`config.c:2568-2583`](src/config.c:2568)):
-   - Auth queries return structured JSON via [`send_websocket_response_data()`](src/config.c:2571)
-   - System commands return status data via [`send_websocket_response_data()`](src/config.c:2631)
-
-2. **Response Format Consistency**:
-   - Admin responses use standard JSON format
-   - Regular events use standard Nostr event format
-   - Both transmitted through same WebSocket pipeline
-
-3. **Error Handling Consistency**:
-   - Admin errors returned via same WebSocket connection
-   - Regular event errors returned via OK messages
-   - Both use identical transmission mechanism
-
-### 3.4 Key Architectural Benefits
-
-**No Changes Required**: The output flow is already unified and correctly implemented.
-
-**Security Separation**: Admin events are processed separately but responses flow through the same secure WebSocket channel.
-
-**Performance Consistency**: Both admin and regular responses use the same optimized transmission path.
-
-**Maintenance Simplicity**: Single WebSocket output pipeline reduces complexity and potential bugs.
-
-### 3.5 Admin Event Flow Summary
-
-```
-Admin Event Input → Authorization Check → Admin Processing → Unified WebSocket Output
-Regular Event Input → Validation → Storage + Broadcast → Unified WebSocket Output
-```
-
-Both flows converge at the **Unified WebSocket Output** stage, which is already correctly implemented.
-
-## Phase 4: Integration Points for Secure Admin Event Routing
-
-### 4.1 Configuration System Integration
-
-**Required Configuration Values**:
-- `admin_pubkey` - Public key of authorized administrator
-- `relay_pubkey` - Public key of this relay instance
-
-**Integration Points**:
-1. [`get_config_value()`](src/config.c) - Used by authorization function
-2. [`get_relay_pubkey_cached()`](src/config.c) - Used for relay targeting validation
-3. Configuration loading during startup - Must ensure admin/relay pubkeys are available
-
-### 4.3 Forward Declarations Required
-
-**Location**: [`src/main.c`](src/main.c) - Add near other forward declarations (around line 230)
-
-```c
-// Forward declarations for enhanced admin event authorization
-int is_authorized_admin_event(cJSON* event, char* error_message, size_t error_size);
-```
-
-### 4.4 Error Handling Integration
-
-**Enhanced Error Response System**:
-
-```c
-// In main.c event processing - enhanced error handling for admin events
-if (auth_result != 0) {
-    // Admin authorization failed - send detailed OK response
-    cJSON* event_id = cJSON_GetObjectItem(event, "id");
-    if (event_id && cJSON_IsString(event_id)) {
-        cJSON* response = cJSON_CreateArray();
-        cJSON_AddItemToArray(response, cJSON_CreateString("OK"));
-        cJSON_AddItemToArray(response, cJSON_CreateString(cJSON_GetStringValue(event_id)));
-        cJSON_AddItemToArray(response, cJSON_CreateBool(0)); // Failed
-        cJSON_AddItemToArray(response, cJSON_CreateString(auth_error));
-        
-        // Send via standard WebSocket output pipeline
-        char *response_str = cJSON_Print(response);
-        if (response_str) {
-            size_t response_len = strlen(response_str);
-            unsigned char *buf = malloc(LWS_PRE + response_len);
-            if (buf) {
-                memcpy(buf + LWS_PRE, response_str, response_len);
-                lws_write(wsi, buf + LWS_PRE, response_len, LWS_WRITE_TEXT);
-                free(buf);
-            }
-            free(response_str);
-        }
-        cJSON_Delete(response);
-    }
-}
-```
-
-### 4.5 Logging Integration Points
-
-**Console Logging**: Uses existing [`log_warning()`](src/main.c:993), [`log_info()`](src/main.c:972) functions
-
-**Security Event Categories**:
-- Admin authorization success logged via `log_info()`
-- Admin authorization failures logged via `log_warning()`
-- Admin event processing logged via existing admin logging
-
-## Phase 5: Detailed Function Specifications
-
-### 5.1 Core Authorization Function
-
-**Function**: `is_authorized_admin_event()`
-**Location**: [`src/main.c`](src/main.c) or [`src/config.c`](src/config.c)
-**Dependencies**:
-- `get_config_value()` for admin/relay pubkeys
-- `log_warning()` and `log_info()` for logging
-- `cJSON` library for event parsing
-
-**Return Values**:
-- `0` - Event is authorized for admin processing
-- `-1` - Event is unauthorized (treat as regular event)
-- `-2` - Validation error (malformed event)
-
-**Error Handling**: Detailed error messages in provided buffer for client feedback
-
-### 5.2 Enhanced Event Routing
-
-**Location**: [`main.c:3248-3340`](src/main.c:3248)
-**Integration**: Replaces existing admin event routing logic
-**Dependencies**:
-- `is_authorized_admin_event()` for authorization
-- `process_admin_event_in_config()` for admin processing
-- `store_event()` and `broadcast_event_to_subscriptions()` for regular events
-
-**Security Features**:
-- Graceful degradation for unauthorized admin events
-- Comprehensive logging of authorization attempts
-- No broadcast of admin events to subscriptions
-- Detailed error responses for failed authorization
-
-### 5.4 Defense-in-Depth Validation
-
-**Primary Validation**: In main event routing logic
-**Secondary Validation**: In `process_admin_event_in_config()` function
-**Tertiary Validation**: In individual admin command handlers
-
-**Validation Layers**:
-1. **Kind Check** - Must be admin event kind (23455/23456)
-2. **Relay Targeting Check** - Must have 'p' tag with this relay's pubkey
-3. **Admin Signature Check** - Must be signed by authorized admin (only if targeting this relay)
-4. **Processing Check** - Additional validation in admin handlers
-
-**Security Logic**:
-- If no 'p' tag for this relay → Admin event for different relay (not unauthorized)
-- If 'p' tag for this relay + wrong admin signature → "Unauthorized admin event attempt"
-
-## Phase 6: Event Flow Documentation
-
-### 6.1 Complete Event Processing Flow
-
-```
-┌─────────────────┐
-│ WebSocket Input │
-└─────────┬───────┘
-          │
-          ▼
-┌─────────────────┐
-│ Unified         │
-│ Validation      │ ← nostr_validate_unified_request()
-└─────────┬───────┘
-          │
-          ▼
-┌─────────────────┐
-│ Kind-Based      │
-│ Routing Check   │ ← Check if kind 23455/23456
-└─────────┬───────┘
-          │
-     ┌────▼────┐
-     │ Admin?  │
-     └────┬────┘
-          │
-    ┌─────▼─────┐         ┌─────────────┐
-    │ YES       │         │ NO          │
-    │           │         │             │
-    ▼           │         ▼             │
-┌─────────────┐ │    ┌─────────────┐    │
-│ Admin       │ │    │ Regular     │    │
-│ Authorization│ │    │ Event       │    │
-│ Check       │ │    │ Processing  │    │
-└─────┬───────┘ │    └─────┬───────┘    │
-      │         │          │            │
- ┌────▼────┐    │          ▼            │
- │Authorized?│   │    ┌─────────────┐    │
- └────┬────┘    │    │ store_event()│    │
-      │         │    │ +           │    │
-┌─────▼─────┐   │    │ broadcast() │    │
-│ YES   NO  │   │    └─────┬───────┘    │
-│  │     │  │   │          │            │
-│  ▼     ▼  │   │          ▼            │
-│┌─────┐┌───┴┐  │    ┌─────────────┐    │
-││Admin││Treat│  │    │ WebSocket   │    │
-││API  ││as   │  │    │ OK Response │    │
-││     ││Reg  │  │    └─────────────┘    │
-│└──┬──┘└───┬┘  │                       │
-│   │      │   │                       │
-│   ▼      │   │                       │
-│┌─────────┐│   │                       │
-││WebSocket││   │                       │
-││Response ││   │                       │
-│└─────────┘│   │                       │
-└───────────┴───┘                       │
-            │                           │
-            └───────────────────────────┘
-                        │
-                        ▼
-                ┌─────────────┐
-                │ Unified     │
-                │ WebSocket   │
-                │ Output      │
-                └─────────────┘
-```
-
-### 6.2 Security Decision Points
-
-1. **Event Kind Check** - Identifies potential admin events
-2. **Authorization Validation** - Three-layer security check
-3. **Routing Decision** - Admin API vs Regular processing
-4. **Response Generation** - Unified output pipeline
-5. **Audit Logging** - Security event tracking
-
-### 6.3 Error Handling Paths
-
-**Validation Errors**: Return detailed error messages via OK response
-**Authorization Failures**: Log security event + treat as regular event
-**Processing Errors**: Return admin-specific error responses
-**System Errors**: Fallback to standard error handling
-
-This completes the comprehensive implementation plan for the enhanced admin event API structure with unified output flow architecture.

Makefile

@@ -9,7 +9,7 @@ LIBS = -lsqlite3 -lwebsockets -lz -ldl -lpthread -lm -L/usr/local/lib -lsecp256k
 BUILD_DIR = build
 
 # Source files
-MAIN_SRC = src/main.c src/config.c src/request_validator.c
+MAIN_SRC = src/main.c src/config.c src/request_validator.c src/nip009.c src/nip011.c src/nip013.c src/nip040.c src/nip042.c src/websockets.c src/subscriptions.c
 NOSTR_CORE_LIB = nostr_core_lib/libnostr_core_x64.a
 
 # Architecture detection

README.md

@@ -24,7 +24,7 @@ Do NOT modify the formatting, add emojis, or change the text. Keep the simple fo
 
 ## 🔧 Administrator API
 
-C-Relay uses an innovative **event-based administration system** where all configuration and management commands are sent as signed Nostr events using the admin private key generated during first startup. All admin commands use **tag-based parameters** for simplicity and compatibility.
+C-Relay uses an innovative **event-based administration system** where all configuration and management commands are sent as signed Nostr events using the admin private key generated during first startup. All admin commands use **NIP-44 encrypted command arrays** for security and compatibility.
 
 ### Authentication
 
@@ -32,7 +32,7 @@ All admin commands require signing with the admin private key displayed during f
 
 ### Event Structure
 
-All admin commands use the same unified event structure with tag-based parameters:
+All admin commands use the same unified event structure with NIP-44 encrypted content:
 
 **Admin Command Event:**
 ```json
@@ -41,14 +41,16 @@ All admin commands use the same unified event structure with tag-based parameter
   "pubkey": "admin_public_key",
   "created_at": 1234567890,
   "kind": 23456,
-  "content": "<nip44 encrypted command>",
+  "content": "AqHBUgcM7dXFYLQuDVzGwMST1G8jtWYyVvYxXhVGEu4nAb4LVw...",
   "tags": [
-    ["p", "relay_public_key"],
+    ["p", "relay_public_key"]
   ],
   "sig": "event_signature"
 }
 ```
 
+The `content` field contains a NIP-44 encrypted JSON array representing the command.
+
 **Admin Response Event:**
 ```json
 ["EVENT", "temp_sub_id", {
@@ -56,7 +58,7 @@ All admin commands use the same unified event structure with tag-based parameter
   "pubkey": "relay_public_key",
   "created_at": 1234567890,
   "kind": 23457,
-  "content": "<nip44 encrypted response>",
+  "content": "BpKCVhfN8eYtRmPqSvWxZnMkL2gHjUiOp3rTyEwQaS5dFg...",
   "tags": [
     ["p", "admin_public_key"]
   ],
@@ -64,15 +66,17 @@ All admin commands use the same unified event structure with tag-based parameter
 }]
 ```
 
+The `content` field contains a NIP-44 encrypted JSON response object.
+
 ### Admin Commands
 
-All commands are sent as nip44 encrypted content. The following table lists all available commands:
+All commands are sent as NIP-44 encrypted JSON arrays in the event content. The following table lists all available commands:
 
-| Command Type | Tag Format | Description |
-|--------------|------------|-------------|
+| Command Type | Command Format | Description |
+|--------------|----------------|-------------|
 | **Configuration Management** |
-| `config_update` | `["relay_description", "My Relay"]` | Update relay configuration parameters |
-| `config_query` | `["config_query", "list_all_keys"]` | List all available configuration keys |
+| `config_update` | `["config_update", [{"key": "auth_enabled", "value": "true", "data_type": "boolean", "category": "auth"}, {"key": "relay_description", "value": "My Relay", "data_type": "string", "category": "relay"}, ...]]` | Update relay configuration parameters (supports multiple updates) |
+| `config_query` | `["config_query", "all"]` | Query all configuration parameters |
 | **Auth Rules Management** |
 | `auth_add_blacklist` | `["blacklist", "pubkey", "abc123..."]` | Add pubkey to blacklist |
 | `auth_add_whitelist` | `["whitelist", "pubkey", "def456..."]` | Add pubkey to whitelist |
@@ -117,7 +121,7 @@ All admin commands return **signed EVENT responses** via WebSocket following sta
   "pubkey": "relay_public_key",
   "created_at": 1234567890,
   "kind": 23457,
-  "content": "nip44 encrypted:{\"status\": \"success\", \"message\": \"Operation completed successfully\"}",
+  "content": "nip44 encrypted:{\"query_type\": \"config_update\", \"status\": \"success\", \"message\": \"Operation completed successfully\", \"timestamp\": 1234567890}",
   "tags": [
     ["p", "admin_public_key"]
   ],
@@ -132,7 +136,7 @@ All admin commands return **signed EVENT responses** via WebSocket following sta
   "pubkey": "relay_public_key",
   "created_at": 1234567890,
   "kind": 23457,
-  "content": "nip44 encrypted:{\"status\": \"error\", \"message\": \"Error: invalid configuration value\"}",
+  "content": "nip44 encrypted:{\"query_type\": \"config_update\", \"status\": \"error\", \"error\": \"invalid configuration value\", \"timestamp\": 1234567890}",
   "tags": [
     ["p", "admin_public_key"]
   ],
@@ -147,7 +151,7 @@ All admin commands return **signed EVENT responses** via WebSocket following sta
   "pubkey": "relay_public_key",
   "created_at": 1234567890,
   "kind": 23457,
-  "content": "nip44 encrypted:{\"query_type\": \"auth_rules\", \"total_results\": 2, \"data\": [{\"rule_type\": \"blacklist\", \"pattern_type\": \"pubkey\", \"pattern_value\": \"abc123...\", \"action\": \"deny\"}]}",
+  "content": "nip44 encrypted:{\"query_type\": \"auth_rules_all\", \"total_results\": 2, \"timestamp\": 1234567890, \"data\": [{\"rule_type\": \"blacklist\", \"pattern_type\": \"pubkey\", \"pattern_value\": \"abc123...\", \"action\": \"allow\"}]}",
   "tags": [
     ["p", "admin_public_key"]
   ],
@@ -162,7 +166,7 @@ All admin commands return **signed EVENT responses** via WebSocket following sta
   "pubkey": "relay_public_key",
   "created_at": 1234567890,
   "kind": 23457,
-  "content": "nip44 encrypted:{\"query_type\": \"config_keys\", \"config_keys\": [\"auth_enabled\", \"max_connections\"], \"descriptions\": {\"auth_enabled\": \"Enable whitelist/blacklist rules\"}}",
+  "content": "nip44 encrypted:{\"query_type\": \"config_all\", \"total_results\": 27, \"timestamp\": 1234567890, \"data\": [{\"key\": \"auth_enabled\", \"value\": \"false\", \"data_type\": \"boolean\", \"category\": \"auth\", \"description\": \"Enable NIP-42 authentication\"}, {\"key\": \"relay_description\", \"value\": \"My Relay\", \"data_type\": \"string\", \"category\": \"relay\", \"description\": \"Relay description text\"}]}",
   "tags": [
     ["p", "admin_public_key"]
   ],
@@ -170,3 +174,32 @@ All admin commands return **signed EVENT responses** via WebSocket following sta
 }]
 ```
 
+**Configuration Update Success Response:**
+```json
+["EVENT", "temp_sub_id", {
+  "id": "response_event_id",
+  "pubkey": "relay_public_key",
+  "created_at": 1234567890,
+  "kind": 23457,
+  "content": "nip44 encrypted:{\"query_type\": \"config_update\", \"total_results\": 2, \"timestamp\": 1234567890, \"status\": \"success\", \"data\": [{\"key\": \"auth_enabled\", \"value\": \"true\", \"status\": \"updated\"}, {\"key\": \"relay_description\", \"value\": \"My Updated Relay\", \"status\": \"updated\"}]}",
+  "tags": [
+    ["p", "admin_public_key"]
+  ],
+  "sig": "response_event_signature"
+}]
+```
+
+**Configuration Update Error Response:**
+```json
+["EVENT", "temp_sub_id", {
+  "id": "response_event_id",
+  "pubkey": "relay_public_key",
+  "created_at": 1234567890,
+  "kind": 23457,
+  "content": "nip44 encrypted:{\"query_type\": \"config_update\", \"status\": \"error\", \"error\": \"field validation failed: invalid port number '99999' (must be 1-65535)\", \"timestamp\": 1234567890}",
+  "tags": [
+    ["p", "admin_public_key"]
+  ],
+  "sig": "response_event_signature"
+}]
+```

docs/admin_api_plan.md

@@ -36,122 +36,70 @@ CREATE TABLE auth_rules (
 
 #### Admin API Commands (via WebSocket with admin private key)
 
-**Kind 23455: Configuration Management (Ephemeral)**
-- Update relay settings, limits, authentication policies
-- **Standard Mode**: Commands in tags `["config_key", "config_value"]`
-- **Encrypted Mode**: Commands NIP-44 encrypted in content `{"encrypted_tags": "..."}`
-- Content: Descriptive text or encrypted payload
-- Security: Optional NIP-44 encryption for sensitive operations
-
-**Kind 23456: Auth Rules & System Management (Ephemeral)**
+**Kind 23456: Unified Admin API (Ephemeral)**
+- Configuration management: Update relay settings, limits, authentication policies
 - Auth rules: Add/remove/query whitelist/blacklist rules
 - System commands: clear rules, status, cache management
-- **Standard Mode**: Commands in tags
-  - Rule format: `["rule_type", "pattern_type", "pattern_value"]`
-  - Query format: `["auth_query", "filter"]`
-  - System format: `["system_command", "command_name"]`
-- **Encrypted Mode**: Commands NIP-44 encrypted in content `{"encrypted_tags": "..."}`
-- Content: Action description + optional encrypted payload
-- Security: Optional NIP-44 encryption for sensitive operations
+- **Unified Format**: All commands use NIP-44 encrypted content with `["p", "relay_pubkey"]` tags
+- **Command Types**:
+  - Configuration: `["config_key", "config_value"]`
+  - Auth rules: `["rule_type", "pattern_type", "pattern_value"]`
+  - Queries: `["auth_query", "filter"]` or `["system_command", "command_name"]`
+- **Security**: All admin commands use NIP-44 encryption for privacy and security
 
-#### Configuration Query Commands (using Kind 23455)
+#### Configuration Commands (using Kind 23456)
 
-1. **List All Configuration Keys (Standard)**:
-   ```json
-   {
-     "kind": 23455,
-     "content": "Discovery query",
-     "tags": [["config_query", "list_all_keys"]]
-   }
-   ```
-
-2. **List All Configuration Keys (Encrypted)**:
-   ```json
-   {
-     "kind": 23455,
-     "content": "{\"query\":\"list_config_keys\",\"encrypted_tags\":\"nip44_encrypted_payload\"}",
-     "tags": []
-   }
-   ```
-   *Encrypted payload contains:* `[["config_query", "list_all_keys"]]`
-
-3. **Get Current Configuration (Standard)**:
-   ```json
-   {
-     "kind": 23455,
-     "content": "Config query",
-     "tags": [["config_query", "get_current_config"]]
-   }
-   ```
-
-4. **Get Current Configuration (Encrypted)**:
-   ```json
-   {
-     "kind": 23455,
-     "content": "{\"query\":\"get_config\",\"encrypted_tags\":\"nip44_encrypted_payload\"}",
-     "tags": []
-   }
-   ```
-   *Encrypted payload contains:* `[["config_query", "get_current_config"]]`
-
-#### System Management Commands (using Kind 23456)
-
-1. **Clear All Auth Rules (Standard)**:
+1. **Update Configuration**:
    ```json
    {
      "kind": 23456,
-     "content": "{\"action\":\"clear_all\"}",
-     "tags": [["system_command", "clear_all_auth_rules"]]
+     "content": "base64_nip44_encrypted_command_array",
+     "tags": [["p", "relay_pubkey"]]
    }
    ```
+   *Encrypted content contains:* `["relay_description", "My Relay"]`
 
-2. **Clear All Auth Rules (Encrypted)**:
+2. **Query System Status**:
    ```json
    {
      "kind": 23456,
-     "content": "{\"action\":\"clear_all\",\"encrypted_tags\":\"nip44_encrypted_payload\"}",
-     "tags": []
+     "content": "base64_nip44_encrypted_command_array",
+     "tags": [["p", "relay_pubkey"]]
    }
    ```
-   *Encrypted payload contains:* `[["system_command", "clear_all_auth_rules"]]`
+   *Encrypted content contains:* `["system_command", "system_status"]`
 
-3. **Query All Auth Rules (Standard)**:
+#### Auth Rules and System Commands (using Kind 23456)
+
+1. **Clear All Auth Rules**:
    ```json
    {
      "kind": 23456,
-     "content": "{\"query\":\"list_auth_rules\"}",
-     "tags": [["auth_query", "all"]]
+     "content": "base64_nip44_encrypted_command_array",
+     "tags": [["p", "relay_pubkey"]]
    }
    ```
+   *Encrypted content contains:* `["system_command", "clear_all_auth_rules"]`
 
-4. **Query All Auth Rules (Encrypted)**:
+2. **Query All Auth Rules**:
    ```json
    {
      "kind": 23456,
-     "content": "{\"query\":\"list_auth_rules\",\"encrypted_tags\":\"nip44_encrypted_payload\"}",
-     "tags": []
+     "content": "base64_nip44_encrypted_command_array",
+     "tags": [["p", "relay_pubkey"]]
    }
    ```
-   *Encrypted payload contains:* `[["auth_query", "all"]]`
+   *Encrypted content contains:* `["auth_query", "all"]`
 
-5. **Add Blacklist Rule (Standard)**:
+3. **Add Blacklist Rule**:
    ```json
    {
      "kind": 23456,
-     "content": "{\"action\":\"add\"}",
-     "tags": [["blacklist", "pubkey", "deadbeef1234abcd..."]]
+     "content": "base64_nip44_encrypted_command_array",
+     "tags": [["p", "relay_pubkey"]]
    }
    ```
-
-6. **Add Blacklist Rule (Encrypted)**:
-   ```json
-   {
-     "kind": 23456,
-     "content": "{\"action\":\"add\",\"encrypted_tags\":\"nip44_encrypted_payload\"}",
-     "tags": []
-   }
-   ```
-   *Encrypted payload contains:* `[["blacklist", "pubkey", "deadbeef1234abcd..."]]`
+   *Encrypted content contains:* `["blacklist", "pubkey", "deadbeef1234abcd..."]`
 
 ### Phase 2: Auth Rules Schema Alignment
 
@@ -181,12 +129,12 @@ Would require changing schema, migration scripts, and storage logic.
 #### High Priority (Critical for blacklist functionality):
 1. Fix request_validator.c schema mismatch
 2. Ensure auth_required configuration is enabled
-3. Update tests to use ephemeral event kinds (23455/23456)
+3. Update tests to use unified ephemeral event kind (23456)
 4. Test blacklist enforcement
 
 #### Medium Priority (Enhanced Admin Features):
 1. **Implement NIP-44 Encryption Support**:
-   - Detect empty tags array for Kind 23455/23456 events
+   - Detect NIP-44 encrypted content for Kind 23456 events
    - Parse `encrypted_tags` field from content JSON
    - Decrypt using admin privkey and relay pubkey
    - Process decrypted tags as normal commands
@@ -218,45 +166,20 @@ Would require changing schema, migration scripts, and storage logic.
 ## Authentication
 All admin commands require signing with the admin private key generated during first startup.
 
-## Configuration Management (Kind 23455 - Ephemeral)
+## Unified Admin API (Kind 23456 - Ephemeral)
 Update relay configuration parameters or query available settings.
 
 **Configuration Update Event:**
 ```json
 {
-  "kind": 23455,
-  "content": "Configuration update",
-  "tags": [
-    ["config_key1", "config_value1"],
-    ["config_key2", "config_value2"]
-  ]
+  "kind": 23456,
+  "content": "base64_nip44_encrypted_command_array",
+  "tags": [["p", "relay_pubkey"]]
 }
 ```
+*Encrypted content contains:* `["relay_description", "My Relay Description"]`
 
-**List Available Config Keys:**
-```json
-{
-  "kind": 23455,
-  "content": "{\"query\":\"list_config_keys\",\"description\":\"Get editable config keys\"}",
-  "tags": [
-    ["config_query", "list_all_keys"]
-  ]
-}
-```
-
-**Get Current Configuration:**
-```json
-{
-  "kind": 23455,
-  "content": "{\"query\":\"get_config\",\"description\":\"Get current config values\"}",
-  "tags": [
-    ["config_query", "get_current_config"]
-  ]
-}
-```
-
-## Auth Rules Management (Kind 23456 - Ephemeral)
-Manage whitelist and blacklist rules.
+**Auth Rules Management:**
 
 **Add Rule Event:**
 ```json
@@ -364,7 +287,7 @@ All admin commands return JSON responses via WebSocket:
 ### Enable Authentication & Add Blacklist
 ```bash
 # 1. Enable auth system
-nak event -k 23455 --content "Enable authentication" \
+nak event -k 23456 --content "base64_nip44_encrypted_command" \
   -t "auth_enabled=true" \
   --sec $ADMIN_PRIVKEY | nak event ws://localhost:8888
 
@@ -389,18 +312,18 @@ nak event -k 23456 --content '{"action":"clear_all","description":"Clear all rul
 ### Configuration Query Response
 ```json
 ["EVENT", "subscription_id", {
-  "kind": 23455,
-  "content": "{\"config_keys\": [\"auth_enabled\", \"max_connections\"], \"descriptions\": {\"auth_enabled\": \"Enable whitelist/blacklist rules\"}}",
-  "tags": [["response_type", "config_keys_list"]]
+  "kind": 23457,
+  "content": "base64_nip44_encrypted_response",
+  "tags": [["p", "admin_pubkey"]]
 }]
 ```
 
 ### Current Config Response
 ```json
 ["EVENT", "subscription_id", {
-  "kind": 23455,
-  "content": "{\"current_config\": {\"auth_enabled\": \"true\", \"max_connections\": \"1000\"}}",
-  "tags": [["response_type", "current_config"]]
+  "kind": 23457,
+  "content": "base64_nip44_encrypted_response",
+  "tags": [["p", "admin_pubkey"]]
 }]
 ```
 
@@ -427,7 +350,7 @@ nak event -k 23456 --content '{"action":"clear_all","description":"Clear all rul
 1. **Document API** (this file) ✅
 2. **Update to ephemeral event kinds** ✅
 3. **Fix request_validator.c** schema mismatch
-4. **Update tests** to use Kind 23455/23456
+4. **Update tests** to use unified Kind 23456
 5. **Add auth rule query functionality**
 6. **Add configuration discovery feature**
 7. **Test blacklist functionality**
@@ -449,8 +372,8 @@ This plan addresses the immediate blacklist issue while establishing a comprehen
 ```c
 // In admin event processing function
 bool is_encrypted_command(struct nostr_event *event) {
-    // Check if Kind 23455 or 23456 with empty tags
-    if ((event->kind == 23455 || event->kind == 23456) &&
+    // Check if Kind 23456 with NIP-44 encrypted content
+    if (event->kind == 23456 &&
         event->tags_count == 0) {
         return true;
     }
@@ -483,7 +406,7 @@ cJSON *decrypt_admin_tags(struct nostr_event *event) {
 ```
 
 ### Admin Event Processing Flow
-1. **Receive Event**: Kind 23455/23456 with admin signature
+1. **Receive Event**: Kind 23456 with admin signature
 2. **Check Mode**: Empty tags = encrypted, populated tags = standard
 3. **Decrypt if Needed**: Extract and decrypt `encrypted_tags` from content
 4. **Process Commands**: Use decrypted/standard tags for command processing
@@ -510,7 +433,7 @@ char* nip44_decrypt(const char* ciphertext, const char* recipient_privkey, const
 
 #### Phase 1: Core Infrastructure (Complete)
 - [x] Event-based admin authentication system
-- [x] Kind 23455/23456 (Configuration/Auth Rules) processing
+- [x] Kind 23456 (Unified Admin API) processing
 - [x] Basic configuration parameter updates
 - [x] Auth rule add/remove/clear functionality
 - [x] Updated to ephemeral event kinds

make_and_restart_relay.sh

@@ -63,7 +63,7 @@ while [[ $# -gt 0 ]]; do
                 shift 2
             fi
             ;;
-        --preserve-database)
+        -d|--preserve-database)
             PRESERVE_DATABASE=true
             shift
             ;;

nip11_relay_connection_implementation_plan.md

@@ -0,0 +1,455 @@
+# NIP-11 Relay Connection Implementation Plan
+
+## Overview
+Implement NIP-11 relay information fetching in the web admin interface to replace hardcoded relay pubkey and provide proper relay connection flow.
+
+## Current Issues
+1. **Hardcoded Relay Pubkey**: `getRelayPubkey()` returns hardcoded value `'4f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa'`
+2. **Relay URL in Debug Section**: Currently in "DEBUG - TEST FETCH WITHOUT LOGIN" section (lines 336-385)
+3. **No Relay Verification**: Users can attempt admin operations without verifying relay identity
+4. **Missing NIP-11 Support**: No fetching of relay information document
+
+## Implementation Plan
+
+### 1. New Relay Connection Section (HTML Structure)
+
+Add after User Info section (around line 332):
+
+```html
+<!-- Relay Connection Section -->
+<div class="section">
+    <h2>RELAY CONNECTION</h2>
+    <div class="input-group">
+        <label for="relay-url-input">Relay URL:</label>
+        <input type="text" id="relay-url-input" value="ws://localhost:8888" placeholder="ws://localhost:8888 or wss://relay.example.com">
+    </div>
+    <div class="inline-buttons">
+        <button type="button" id="connect-relay-btn">CONNECT TO RELAY</button>
+        <button type="button" id="disconnect-relay-btn" style="display: none;">DISCONNECT</button>
+    </div>
+    <div class="status disconnected" id="relay-connection-status">NOT CONNECTED</div>
+    
+    <!-- Relay Information Display -->
+    <div id="relay-info-display" class="hidden">
+        <h3>Relay Information</h3>
+        <div class="user-info">
+            <div><strong>Name:</strong> <span id="relay-name">-</span></div>
+            <div><strong>Description:</strong> <span id="relay-description">-</span></div>
+            <div><strong>Public Key:</strong>
+                <div class="user-pubkey" id="relay-pubkey-display">-</div>
+            </div>
+            <div><strong>Software:</strong> <span id="relay-software">-</span></div>
+            <div><strong>Version:</strong> <span id="relay-version">-</span></div>
+            <div><strong>Contact:</strong> <span id="relay-contact">-</span></div>
+            <div><strong>Supported NIPs:</strong> <span id="relay-nips">-</span></div>
+        </div>
+    </div>
+</div>
+```
+
+### 2. JavaScript Implementation
+
+#### Global State Variables
+Add to global state section (around line 535):
+
+```javascript
+// Relay connection state
+let relayInfo = null;
+let isRelayConnected = false;
+let relayWebSocket = null;
+```
+
+#### NIP-11 Fetching Function
+Add new function:
+
+```javascript
+// Fetch relay information using NIP-11
+async function fetchRelayInfo(relayUrl) {
+    try {
+        console.log('=== FETCHING RELAY INFO VIA NIP-11 ===');
+        console.log('Relay URL:', relayUrl);
+        
+        // Convert WebSocket URL to HTTP URL for NIP-11
+        let httpUrl = relayUrl;
+        if (relayUrl.startsWith('ws://')) {
+            httpUrl = relayUrl.replace('ws://', 'http://');
+        } else if (relayUrl.startsWith('wss://')) {
+            httpUrl = relayUrl.replace('wss://', 'https://');
+        }
+        
+        console.log('HTTP URL for NIP-11:', httpUrl);
+        
+        // Fetch relay information document
+        const response = await fetch(httpUrl, {
+            method: 'GET',
+            headers: {
+                'Accept': 'application/nostr+json'
+            },
+            // Add timeout
+            signal: AbortSignal.timeout(10000) // 10 second timeout
+        });
+        
+        if (!response.ok) {
+            throw new Error(`HTTP ${response.status}: ${response.statusText}`);
+        }
+        
+        const contentType = response.headers.get('content-type');
+        if (!contentType || !contentType.includes('application/json')) {
+            throw new Error(`Invalid content type: ${contentType}. Expected application/json or application/nostr+json`);
+        }
+        
+        const relayInfoData = await response.json();
+        console.log('Fetched relay info:', relayInfoData);
+        
+        // Validate required fields
+        if (!relayInfoData.pubkey) {
+            throw new Error('Relay information missing required pubkey field');
+        }
+        
+        // Validate pubkey format (64 hex characters)
+        if (!/^[0-9a-fA-F]{64}$/.test(relayInfoData.pubkey)) {
+            throw new Error(`Invalid relay pubkey format: ${relayInfoData.pubkey}`);
+        }
+        
+        return relayInfoData;
+        
+    } catch (error) {
+        console.error('Failed to fetch relay info:', error);
+        throw error;
+    }
+}
+```
+
+#### Relay Connection Function
+Add new function:
+
+```javascript
+// Connect to relay and fetch information
+async function connectToRelay() {
+    try {
+        const relayUrlInput = document.getElementById('relay-url-input');
+        const connectBtn = document.getElementById('connect-relay-btn');
+        const disconnectBtn = document.getElementById('disconnect-relay-btn');
+        const statusDiv = document.getElementById('relay-connection-status');
+        const infoDisplay = document.getElementById('relay-info-display');
+        
+        const url = relayUrlInput.value.trim();
+        if (!url) {
+            throw new Error('Please enter a relay URL');
+        }
+        
+        // Update UI to show connecting state
+        connectBtn.disabled = true;
+        statusDiv.textContent = 'CONNECTING...';
+        statusDiv.className = 'status connected';
+        
+        console.log('Connecting to relay:', url);
+        
+        // Fetch relay information via NIP-11
+        console.log('Fetching relay information...');
+        const fetchedRelayInfo = await fetchRelayInfo(url);
+        
+        // Test WebSocket connection
+        console.log('Testing WebSocket connection...');
+        await testWebSocketConnection(url);
+        
+        // Store relay information
+        relayInfo = fetchedRelayInfo;
+        isRelayConnected = true;
+        
+        // Update UI with relay information
+        displayRelayInfo(relayInfo);
+        
+        // Update connection status
+        statusDiv.textContent = 'CONNECTED';
+        statusDiv.className = 'status connected';
+        
+        // Update button states
+        connectBtn.style.display = 'none';
+        disconnectBtn.style.display = 'inline-block';
+        relayUrlInput.disabled = true;
+        
+        // Show relay info
+        infoDisplay.classList.remove('hidden');
+        
+        console.log('Successfully connected to relay:', relayInfo.name || url);
+        log(`Connected to relay: ${relayInfo.name || url}`, 'INFO');
+        
+    } catch (error) {
+        console.error('Failed to connect to relay:', error);
+        
+        // Reset UI state
+        const connectBtn = document.getElementById('connect-relay-btn');
+        const statusDiv = document.getElementById('relay-connection-status');
+        
+        connectBtn.disabled = false;
+        statusDiv.textContent = `CONNECTION FAILED: ${error.message}`;
+        statusDiv.className = 'status error';
+        
+        // Clear any partial state
+        relayInfo = null;
+        isRelayConnected = false;
+        
+        log(`Failed to connect to relay: ${error.message}`, 'ERROR');
+    }
+}
+```
+
+#### WebSocket Connection Test
+Add new function:
+
+```javascript
+// Test WebSocket connection to relay
+async function testWebSocketConnection(url) {
+    return new Promise((resolve, reject) => {
+        const timeout = setTimeout(() => {
+            ws.close();
+            reject(new Error('WebSocket connection timeout'));
+        }, 5000);
+        
+        const ws = new WebSocket(url);
+        
+        ws.onopen = () => {
+            clearTimeout(timeout);
+            console.log('WebSocket connection successful');
+            ws.close();
+            resolve();
+        };
+        
+        ws.onerror = (error) => {
+            clearTimeout(timeout);
+            console.error('WebSocket connection failed:', error);
+            reject(new Error('WebSocket connection failed'));
+        };
+        
+        ws.onclose = (event) => {
+            if (event.code !== 1000) {
+                clearTimeout(timeout);
+                reject(new Error(`WebSocket closed with code ${event.code}: ${event.reason}`));
+            }
+        };
+    });
+}
+```
+
+#### Display Relay Information
+Add new function:
+
+```javascript
+// Display relay information in the UI
+function displayRelayInfo(info) {
+    document.getElementById('relay-name').textContent = info.name || 'Unknown';
+    document.getElementById('relay-description').textContent = info.description || 'No description';
+    document.getElementById('relay-pubkey-display').textContent = info.pubkey || 'Unknown';
+    document.getElementById('relay-software').textContent = info.software || 'Unknown';
+    document.getElementById('relay-version').textContent = info.version || 'Unknown';
+    document.getElementById('relay-contact').textContent = info.contact || 'No contact info';
+    
+    // Format supported NIPs
+    let nipsText = 'None specified';
+    if (info.supported_nips && Array.isArray(info.supported_nips) && info.supported_nips.length > 0) {
+        nipsText = info.supported_nips.map(nip => `NIP-${nip.toString().padStart(2, '0')}`).join(', ');
+    }
+    document.getElementById('relay-nips').textContent = nipsText;
+}
+```
+
+#### Disconnect Function
+Add new function:
+
+```javascript
+// Disconnect from relay
+function disconnectFromRelay() {
+    console.log('Disconnecting from relay...');
+    
+    // Clear relay state
+    relayInfo = null;
+    isRelayConnected = false;
+    
+    // Close any existing connections
+    if (relayPool) {
+        const url = document.getElementById('relay-url-input').value.trim();
+        if (url) {
+            relayPool.close([url]);
+        }
+        relayPool = null;
+        subscriptionId = null;
+    }
+    
+    // Reset UI
+    const connectBtn = document.getElementById('connect-relay-btn');
+    const disconnectBtn = document.getElementById('disconnect-relay-btn');
+    const statusDiv = document.getElementById('relay-connection-status');
+    const infoDisplay = document.getElementById('relay-info-display');
+    const relayUrlInput = document.getElementById('relay-url-input');
+    
+    connectBtn.style.display = 'inline-block';
+    disconnectBtn.style.display = 'none';
+    connectBtn.disabled = false;
+    relayUrlInput.disabled = false;
+    
+    statusDiv.textContent = 'NOT CONNECTED';
+    statusDiv.className = 'status disconnected';
+    
+    infoDisplay.classList.add('hidden');
+    
+    // Reset configuration status
+    updateConfigStatus(false);
+    
+    log('Disconnected from relay', 'INFO');
+}
+```
+
+#### Update getRelayPubkey Function
+Replace existing function (around line 3142):
+
+```javascript
+// Helper function to get relay pubkey from connected relay info
+function getRelayPubkey() {
+    if (relayInfo && relayInfo.pubkey) {
+        return relayInfo.pubkey;
+    }
+    
+    // Fallback to hardcoded value if no relay connected (for testing)
+    console.warn('No relay connected, using fallback pubkey');
+    return '4f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa';
+}
+```
+
+### 3. Event Handlers
+
+Add event handlers in the DOMContentLoaded section:
+
+```javascript
+// Relay connection event handlers
+const connectRelayBtn = document.getElementById('connect-relay-btn');
+const disconnectRelayBtn = document.getElementById('disconnect-relay-btn');
+
+if (connectRelayBtn) {
+    connectRelayBtn.addEventListener('click', function(e) {
+        e.preventDefault();
+        connectToRelay().catch(error => {
+            console.error('Connect to relay failed:', error);
+        });
+    });
+}
+
+if (disconnectRelayBtn) {
+    disconnectRelayBtn.addEventListener('click', function(e) {
+        e.preventDefault();
+        disconnectFromRelay();
+    });
+}
+```
+
+### 4. Update Existing Functions
+
+#### Update fetchConfiguration Function
+Add relay connection check at the beginning:
+
+```javascript
+async function fetchConfiguration() {
+    try {
+        console.log('=== FETCHING CONFIGURATION VIA ADMIN API ===');
+        
+        // Check if relay is connected
+        if (!isRelayConnected || !relayInfo) {
+            throw new Error('Must be connected to relay first. Please connect to relay in the Relay Connection section.');
+        }
+        
+        // ... rest of existing function
+    } catch (error) {
+        // ... existing error handling
+    }
+}
+```
+
+#### Update subscribeToConfiguration Function
+Add relay connection check:
+
+```javascript
+async function subscribeToConfiguration() {
+    try {
+        console.log('=== STARTING SIMPLEPOOL CONFIGURATION SUBSCRIPTION ===');
+
+        if (!isRelayConnected || !relayInfo) {
+            console.error('Must be connected to relay first');
+            return false;
+        }
+
+        // Use the relay URL from the connection section instead of the debug section
+        const url = document.getElementById('relay-url-input').value.trim();
+        
+        // ... rest of existing function
+    } catch (error) {
+        // ... existing error handling
+    }
+}
+```
+
+### 5. Update UI Flow
+
+#### Modify showMainInterface Function
+Update to show relay connection requirement:
+
+```javascript
+function showMainInterface() {
+    loginSection.classList.add('hidden');
+    mainInterface.classList.remove('hidden');
+    userPubkeyDisplay.textContent = userPubkey;
+    
+    // Show message about relay connection requirement
+    if (!isRelayConnected) {
+        log('Please connect to a relay to access admin functions', 'INFO');
+    }
+}
+```
+
+### 6. Remove/Update Debug Section
+
+#### Option 1: Remove Debug Section Entirely
+Remove the "DEBUG - TEST FETCH WITHOUT LOGIN" section (lines 335-385) since relay URL is now in the proper connection section.
+
+#### Option 2: Keep Debug Section for Testing
+Update the debug section to use the connected relay URL and add a note that it's for testing purposes.
+
+### 7. Error Handling
+
+Add comprehensive error handling for:
+- Network timeouts
+- Invalid relay URLs
+- Missing NIP-11 support
+- Invalid relay pubkey format
+- WebSocket connection failures
+- CORS issues
+
+### 8. Security Considerations
+
+- Validate relay pubkey format (64 hex characters)
+- Verify relay identity before admin operations
+- Handle CORS properly for NIP-11 requests
+- Sanitize relay information display
+- Warn users about connecting to untrusted relays
+
+## Testing Plan
+
+1. **NIP-11 Fetching**: Test with various relay URLs (localhost, remote relays)
+2. **Error Handling**: Test with invalid URLs, non-Nostr servers, network failures
+3. **WebSocket Connection**: Verify WebSocket connectivity after NIP-11 fetch
+4. **Admin API Integration**: Ensure admin commands use correct relay pubkey
+5. **UI Flow**: Test complete user journey from login → relay connection → admin operations
+
+## Benefits
+
+1. **Proper Relay Identification**: Uses actual relay pubkey instead of hardcoded value
+2. **Better UX**: Clear connection flow and relay information display
+3. **Protocol Compliance**: Implements NIP-11 standard for relay discovery
+4. **Security**: Verifies relay identity before admin operations
+5. **Flexibility**: Works with any NIP-11 compliant relay
+
+## Migration Notes
+
+- Existing users will need to connect to relay after this update
+- Debug section can be kept for development/testing purposes
+- All admin functions will require relay connection
+- Relay pubkey will be dynamically fetched instead of hardcoded

relay.pid

@@ -1 +1 @@
-659207
+1487904

src/config.c

@@ -72,11 +72,14 @@ int remove_auth_rule_from_config(const char* rule_type, const char* pattern_type
 int is_config_table_ready(void);
 int migrate_config_from_events_to_table(void);
 int populate_config_table_from_event(const cJSON* event);
+int handle_config_query_unified(cJSON* event, const char* query_type, char* error_message, size_t error_size, struct lws* wsi);
+int handle_config_set_unified(cJSON* event, const char* config_key, const char* config_value, char* error_message, size_t error_size, struct lws* wsi);
 
 // Forward declarations for tag parsing utilities
 const char* get_first_tag_name(cJSON* event);
 const char* get_tag_value(cJSON* event, const char* tag_name, int value_index);
 int parse_auth_query_parameters(cJSON* event, char** query_type, char** pattern_value);
+int handle_config_update_unified(cJSON* event, char* error_message, size_t error_size, struct lws* wsi);
 
 
 // Current configuration cache
@@ -380,48 +383,9 @@ cJSON* load_config_event_from_database(const char* relay_pubkey) {
         return NULL;
     }
     
-    const char* sql;
-    sqlite3_stmt* stmt;
-    int rc;
-    
     // Configuration is now managed through config table, not events
     log_info("Configuration events are no longer stored in events table");
     return NULL;
-    
-    cJSON* event = NULL;
-    if (sqlite3_step(stmt) == SQLITE_ROW) {
-        // Reconstruct the event JSON from database columns
-        event = cJSON_CreateObject();
-        if (event) {
-            const char* event_pubkey = (const char*)sqlite3_column_text(stmt, 1);
-            
-            cJSON_AddStringToObject(event, "id", (const char*)sqlite3_column_text(stmt, 0));
-            cJSON_AddStringToObject(event, "pubkey", event_pubkey);
-            cJSON_AddNumberToObject(event, "created_at", sqlite3_column_int64(stmt, 2));
-            cJSON_AddNumberToObject(event, "kind", sqlite3_column_int(stmt, 3));
-            cJSON_AddStringToObject(event, "content", (const char*)sqlite3_column_text(stmt, 4));
-            cJSON_AddStringToObject(event, "sig", (const char*)sqlite3_column_text(stmt, 5));
-            
-            // If we didn't have admin pubkey in cache, we should update the cache
-            // Note: This will be handled by the cache refresh mechanism automatically
-            
-            // Parse tags JSON
-            const char* tags_str = (const char*)sqlite3_column_text(stmt, 6);
-            if (tags_str) {
-                cJSON* tags = cJSON_Parse(tags_str);
-                if (tags) {
-                    cJSON_AddItemToObject(event, "tags", tags);
-                } else {
-                    cJSON_AddItemToObject(event, "tags", cJSON_CreateArray());
-                }
-            } else {
-                cJSON_AddItemToObject(event, "tags", cJSON_CreateArray());
-            }
-        }
-    }
-    
-    sqlite3_finalize(stmt);
-    return event;
 }
 
 // ================================
@@ -920,7 +884,7 @@ cJSON* create_default_config_event(const unsigned char* admin_privkey_bytes,
     
     // Create and sign event using nostr_core_lib
     cJSON* event = nostr_create_and_sign_event(
-        23455,                                          // kind
+        33334,                                          // kind
         "C Nostr Relay Configuration",                  // content
         tags,                                           // tags
         admin_privkey_bytes,                           // private key bytes for signing
@@ -1597,7 +1561,7 @@ int process_configuration_event(const cJSON* event) {
     cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
     cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
     
-    if (!kind_obj || (cJSON_GetNumberValue(kind_obj) != 23455 && cJSON_GetNumberValue(kind_obj) != 23456)) {
+    if (!kind_obj || cJSON_GetNumberValue(kind_obj) != 33334) {
         log_error("Invalid event kind for configuration");
         return -1;
     }
@@ -2047,7 +2011,7 @@ int add_pubkeys_to_config_table(void) {
 // Forward declaration for admin authorization function from main.c
 extern int is_authorized_admin_event(cJSON* event);
 
-// Process admin events (updated for new Kind 23455/23456)
+// Process admin events (updated for Kind 23456)
 int process_admin_event_in_config(cJSON* event, char* error_message, size_t error_size, struct lws* wsi) {
     log_info("DEBUG: Entering process_admin_event_in_config()");
     
@@ -2098,9 +2062,6 @@ int process_admin_event_in_config(cJSON* event, char* error_message, size_t erro
     // Route to appropriate handler based on kind
     log_info("DEBUG: Routing to kind-specific handler");
     switch (kind) {
-        case 23455:  // New ephemeral configuration management
-            log_info("DEBUG: Routing to process_admin_config_event (kind 23455)");
-            return process_admin_config_event(event, error_message, error_size);
         case 23456:  // New ephemeral auth rules management
             log_info("DEBUG: Routing to process_admin_auth_event (kind 23456)");
             return process_admin_auth_event(event, error_message, error_size, wsi);
@@ -2112,7 +2073,7 @@ int process_admin_event_in_config(cJSON* event, char* error_message, size_t erro
     }
 }
 
-// Handle Kind 23455 configuration management events
+// Handle legacy Kind 33334 configuration management events
 int process_admin_config_event(cJSON* event, char* error_message, size_t error_size) {
     cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
     int kind = kind_obj ? (int)cJSON_GetNumberValue(kind_obj) : 0;
@@ -2143,9 +2104,8 @@ int process_admin_config_event(cJSON* event, char* error_message, size_t error_s
             if (strcmp(tag_key, "config_query") == 0) {
                 printf("  Config Query: %s\n", tag_val);
                 
-                // For now, config queries are not implemented in the unified handler
-                // They would need to be added to handle_kind_23455_unified similar to auth queries
-                snprintf(error_message, error_size, "config queries not yet implemented in unified handler");
+                // Config queries are not implemented for legacy kind 33334
+                snprintf(error_message, error_size, "config queries not supported for legacy kind 33334");
                 return -1;
             }
         }
@@ -2592,6 +2552,38 @@ int send_admin_response_event(const cJSON* response_data, const char* recipient_
 // ================================
 
 
+// Map query command types to proper response types for frontend routing
+static const char* map_auth_query_type_to_response(const char* query_type) {
+    if (!query_type) return "auth_rules_unknown";
+    
+    if (strcmp(query_type, "all") == 0) {
+        return "auth_rules_all";
+    } else if (strcmp(query_type, "whitelist") == 0) {
+        return "auth_rules_whitelist";
+    } else if (strcmp(query_type, "blacklist") == 0) {
+        return "auth_rules_blacklist";
+    } else if (strcmp(query_type, "pattern") == 0) {
+        return "auth_rules_pattern";
+    } else {
+        return "auth_rules_unknown";
+    }
+}
+
+// Map config query command types to proper response types for frontend routing
+static const char* map_config_query_type_to_response(const char* query_type) {
+    if (!query_type) return "config_unknown";
+    
+    if (strcmp(query_type, "all") == 0) {
+        return "config_all";
+    } else if (strcmp(query_type, "category") == 0) {
+        return "config_category";
+    } else if (strcmp(query_type, "key") == 0) {
+        return "config_key";
+    } else {
+        return "config_unknown";
+    }
+}
+
 // Build standardized query response
 cJSON* build_query_response(const char* query_type, cJSON* results_array, int total_count) {
     if (!query_type || !results_array) return NULL;
@@ -2826,6 +2818,33 @@ int handle_kind_23456_unified(cJSON* event, char* error_message, size_t error_si
         printf("  Query type: %s\n", query_type);
         return handle_auth_query_unified(event, query_type, error_message, error_size, wsi);
     }
+    else if (strcmp(action_type, "config_query") == 0) {
+        log_info("DEBUG: Routing to config_query handler");
+        const char* query_type = get_tag_value(event, action_type, 1);
+        if (!query_type) {
+            log_error("DEBUG: Missing config_query type parameter");
+            snprintf(error_message, error_size, "invalid: missing config_query type");
+            return -1;
+        }
+        printf("  Query type: %s\n", query_type);
+        return handle_config_query_unified(event, query_type, error_message, error_size, wsi);
+    }
+    else if (strcmp(action_type, "config_set") == 0) {
+        log_info("DEBUG: Routing to config_set handler");
+        const char* config_key = get_tag_value(event, action_type, 1);
+        const char* config_value = get_tag_value(event, action_type, 2);
+        if (!config_key || !config_value) {
+            log_error("DEBUG: Missing config_set parameters");
+            snprintf(error_message, error_size, "invalid: missing config_set key or value");
+            return -1;
+        }
+        printf("  Key: %s, Value: %s\n", config_key, config_value);
+        return handle_config_set_unified(event, config_key, config_value, error_message, error_size, wsi);
+    }
+    else if (strcmp(action_type, "config_update") == 0) {
+        log_info("DEBUG: Routing to config_update handler");
+        return handle_config_update_unified(event, error_message, error_size, wsi);
+    }
     else if (strcmp(action_type, "system_command") == 0) {
         log_info("DEBUG: Routing to system_command handler");
         const char* command = get_tag_value(event, action_type, 1);
@@ -2940,8 +2959,9 @@ int handle_auth_query_unified(cJSON* event, const char* query_type, char* error_
     
     sqlite3_finalize(stmt);
     
-    // Build and send response
-    cJSON* response = build_query_response(query_type, results_array, rule_count);
+    // Build and send response with mapped query type for frontend routing
+    const char* mapped_query_type = map_auth_query_type_to_response(query_type);
+    cJSON* response = build_query_response(mapped_query_type, results_array, rule_count);
     if (response) {
         // Get admin pubkey from event for response
         cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
@@ -2958,6 +2978,7 @@ int handle_auth_query_unified(cJSON* event, const char* query_type, char* error_
         if (send_admin_response_event(response, admin_pubkey, wsi) == 0) {
             printf("Total results: %d\n", rule_count);
             log_success("Auth query completed successfully with signed response");
+            printf("  Response query_type: %s (mapped from %s)\n", mapped_query_type, query_type);
             cJSON_Delete(response);
             cJSON_Delete(results_array);
             return 0;
@@ -2970,6 +2991,219 @@ int handle_auth_query_unified(cJSON* event, const char* query_type, char* error_
     return -1;
 }
 
+// Unified config query handler
+int handle_config_query_unified(cJSON* event, const char* query_type, char* error_message, size_t error_size, struct lws* wsi) {
+    // Suppress unused parameter warning
+    (void)wsi;
+    if (!g_db) {
+        snprintf(error_message, error_size, "database not available");
+        return -1;
+    }
+    
+    log_info("Processing unified config query");
+    printf("  Query type: %s\n", query_type);
+    
+    const char* sql = NULL;
+    int use_pattern_param = 0;
+    char* pattern_value = NULL;
+    
+    // Build appropriate SQL query based on query type
+    if (strcmp(query_type, "all") == 0) {
+        sql = "SELECT key, value, data_type, category, description FROM config ORDER BY category, key";
+    }
+    else if (strcmp(query_type, "category") == 0) {
+        // Get category value from tags
+        pattern_value = (char*)get_tag_value(event, "config_query", 2);
+        if (!pattern_value) {
+            snprintf(error_message, error_size, "invalid: category query requires category value");
+            return -1;
+        }
+        sql = "SELECT key, value, data_type, category, description FROM config WHERE category = ? ORDER BY key";
+        use_pattern_param = 1;
+    }
+    else if (strcmp(query_type, "key") == 0) {
+        // Get key value from tags
+        pattern_value = (char*)get_tag_value(event, "config_query", 2);
+        if (!pattern_value) {
+            snprintf(error_message, error_size, "invalid: key query requires key value");
+            return -1;
+        }
+        sql = "SELECT key, value, data_type, category, description FROM config WHERE key = ? ORDER BY key";
+        use_pattern_param = 1;
+    }
+    else {
+        snprintf(error_message, error_size, "invalid: unknown config query type '%s'", query_type);
+        return -1;
+    }
+    
+    // Execute query
+    sqlite3_stmt* stmt;
+    int rc = sqlite3_prepare_v2(g_db, sql, -1, &stmt, NULL);
+    if (rc != SQLITE_OK) {
+        snprintf(error_message, error_size, "failed to prepare config query");
+        return -1;
+    }
+    
+    if (use_pattern_param && pattern_value) {
+        sqlite3_bind_text(stmt, 1, pattern_value, -1, SQLITE_STATIC);
+    }
+    
+    // Build results array
+    cJSON* results_array = cJSON_CreateArray();
+    if (!results_array) {
+        sqlite3_finalize(stmt);
+        snprintf(error_message, error_size, "failed to create results array");
+        return -1;
+    }
+    
+    int config_count = 0;
+    printf("=== Config Query Results (%s) ===\n", query_type);
+    
+    while (sqlite3_step(stmt) == SQLITE_ROW) {
+        const char* key = (const char*)sqlite3_column_text(stmt, 0);
+        const char* value = (const char*)sqlite3_column_text(stmt, 1);
+        const char* data_type = (const char*)sqlite3_column_text(stmt, 2);
+        const char* category = (const char*)sqlite3_column_text(stmt, 3);
+        const char* description = (const char*)sqlite3_column_text(stmt, 4);
+        
+        printf("  %s = %s [%s] (%s)\n",
+               key ? key : "",
+               value ? value : "",
+               data_type ? data_type : "string",
+               category ? category : "general");
+        
+        // Add config item to results array
+        cJSON* config_obj = cJSON_CreateObject();
+        cJSON_AddStringToObject(config_obj, "key", key ? key : "");
+        cJSON_AddStringToObject(config_obj, "value", value ? value : "");
+        cJSON_AddStringToObject(config_obj, "data_type", data_type ? data_type : "string");
+        cJSON_AddStringToObject(config_obj, "category", category ? category : "general");
+        cJSON_AddStringToObject(config_obj, "description", description ? description : "");
+        cJSON_AddItemToArray(results_array, config_obj);
+        
+        config_count++;
+    }
+    
+    sqlite3_finalize(stmt);
+    
+    // Build and send response with mapped query type for frontend routing
+    const char* mapped_query_type = map_config_query_type_to_response(query_type);
+    cJSON* response = build_query_response(mapped_query_type, results_array, config_count);
+    if (response) {
+        // Get admin pubkey from event for response
+        cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
+        const char* admin_pubkey = pubkey_obj ? cJSON_GetStringValue(pubkey_obj) : NULL;
+        
+        if (!admin_pubkey) {
+            cJSON_Delete(response);
+            cJSON_Delete(results_array);
+            snprintf(error_message, error_size, "missing admin pubkey for response");
+            return -1;
+        }
+        
+        // Send response as signed kind 23457 event
+        if (send_admin_response_event(response, admin_pubkey, wsi) == 0) {
+            printf("Total results: %d\n", config_count);
+            log_success("Config query completed successfully with signed response");
+            printf("  Response query_type: %s (mapped from %s)\n", mapped_query_type, query_type);
+            cJSON_Delete(response);
+            cJSON_Delete(results_array);
+            return 0;
+        }
+        cJSON_Delete(response);
+    }
+    
+    cJSON_Delete(results_array);
+    snprintf(error_message, error_size, "failed to send config query response");
+    return -1;
+}
+
+// Unified config set handler
+int handle_config_set_unified(cJSON* event, const char* config_key, const char* config_value, char* error_message, size_t error_size, struct lws* wsi) {
+    // Suppress unused parameter warning
+    (void)wsi;
+    if (!g_db) {
+        snprintf(error_message, error_size, "database not available");
+        return -1;
+    }
+    
+    log_info("Processing unified config set command");
+    printf("  Key: %s\n", config_key);
+    printf("  Value: %s\n", config_value);
+    
+    // Validate the configuration field before updating
+    char validation_error[512];
+    if (validate_config_field(config_key, config_value, validation_error, sizeof(validation_error)) != 0) {
+        log_error("Config field validation failed");
+        printf("  Validation error: %s\n", validation_error);
+        snprintf(error_message, error_size, "validation failed: %s", validation_error);
+        return -1;
+    }
+    
+    // Check if the config key exists in the table
+    const char* check_sql = "SELECT COUNT(*) FROM config WHERE key = ?";
+    sqlite3_stmt* check_stmt;
+    
+    int check_rc = sqlite3_prepare_v2(g_db, check_sql, -1, &check_stmt, NULL);
+    if (check_rc != SQLITE_OK) {
+        snprintf(error_message, error_size, "failed to prepare config existence check");
+        return -1;
+    }
+    
+    sqlite3_bind_text(check_stmt, 1, config_key, -1, SQLITE_STATIC);
+    
+    int config_exists = 0;
+    if (sqlite3_step(check_stmt) == SQLITE_ROW) {
+        config_exists = sqlite3_column_int(check_stmt, 0) > 0;
+    }
+    sqlite3_finalize(check_stmt);
+    
+    if (!config_exists) {
+        snprintf(error_message, error_size, "error: configuration key '%s' not found", config_key);
+        return -1;
+    }
+    
+    // Update the configuration value
+    if (update_config_in_table(config_key, config_value) != 0) {
+        snprintf(error_message, error_size, "failed to update configuration in database");
+        return -1;
+    }
+    
+    // Invalidate cache to ensure fresh reads
+    invalidate_config_cache();
+    
+    // Build response
+    cJSON* response = cJSON_CreateObject();
+    cJSON_AddStringToObject(response, "command", "config_set");
+    cJSON_AddStringToObject(response, "key", config_key);
+    cJSON_AddStringToObject(response, "value", config_value);
+    cJSON_AddStringToObject(response, "status", "success");
+    cJSON_AddNumberToObject(response, "timestamp", (double)time(NULL));
+    
+    printf("Updated config: %s = %s\n", config_key, config_value);
+    
+    // Get admin pubkey from event for response
+    cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
+    const char* admin_pubkey = pubkey_obj ? cJSON_GetStringValue(pubkey_obj) : NULL;
+    
+    if (!admin_pubkey) {
+        cJSON_Delete(response);
+        snprintf(error_message, error_size, "missing admin pubkey for response");
+        return -1;
+    }
+    
+    // Send response as signed kind 23457 event
+    if (send_admin_response_event(response, admin_pubkey, wsi) == 0) {
+        log_success("Config set command completed successfully with signed response");
+        cJSON_Delete(response);
+        return 0;
+    }
+    
+    cJSON_Delete(response);
+    snprintf(error_message, error_size, "failed to send config set response");
+    return -1;
+}
+
 // Unified system command handler
 int handle_system_command_unified(cJSON* event, const char* command, char* error_message, size_t error_size, struct lws* wsi) {
     // Suppress unused parameter warning
@@ -3298,6 +3532,340 @@ int handle_auth_rule_modification_unified(cJSON* event, char* error_message, siz
         return -1;
     }
 }
+// Unified config update handler - handles multiple config objects in single atomic command
+int handle_config_update_unified(cJSON* event, char* error_message, size_t error_size, struct lws* wsi) {
+    // Suppress unused parameter warning
+    (void)wsi;
+    if (!g_db) {
+        snprintf(error_message, error_size, "database not available");
+        return -1;
+    }
+    
+    log_info("Processing unified config update command");
+    
+    // Extract config objects array from synthetic tags created by NIP-44 decryption
+    // The decryption process creates synthetic tags like: ["config_update", [config_objects]]
+    cJSON* tags_obj = cJSON_GetObjectItem(event, "tags");
+    if (!tags_obj || !cJSON_IsArray(tags_obj)) {
+        snprintf(error_message, error_size, "invalid: config update event must have tags");
+        return -1;
+    }
+    
+    // Find the config_update tag with config objects array
+    cJSON* config_objects_array = NULL;
+    cJSON* tag = NULL;
+    cJSON_ArrayForEach(tag, tags_obj) {
+        if (!cJSON_IsArray(tag) || cJSON_GetArraySize(tag) < 2) {
+            continue;
+        }
+        
+        cJSON* tag_name = cJSON_GetArrayItem(tag, 0);
+        if (!tag_name || !cJSON_IsString(tag_name)) {
+            continue;
+        }
+        
+        if (strcmp(cJSON_GetStringValue(tag_name), "config_update") == 0) {
+            // Found config_update tag, get the config objects array
+            cJSON* config_array_item = cJSON_GetArrayItem(tag, 1);
+            if (config_array_item) {
+                // The config objects should be in a JSON string format in the tag
+                if (cJSON_IsString(config_array_item)) {
+                    // Parse the JSON string to get the actual array
+                    const char* config_json = cJSON_GetStringValue(config_array_item);
+                    config_objects_array = cJSON_Parse(config_json);
+                } else if (cJSON_IsArray(config_array_item)) {
+                    // Direct array reference
+                    config_objects_array = cJSON_Duplicate(config_array_item, 1);
+                }
+            }
+            break;
+        }
+    }
+    
+    if (!config_objects_array || !cJSON_IsArray(config_objects_array)) {
+        snprintf(error_message, error_size, "invalid: config_update command requires config objects array");
+        return -1;
+    }
+    
+    int config_count = cJSON_GetArraySize(config_objects_array);
+    log_info("Config update command contains config objects");
+    printf("  Config objects count: %d\n", config_count);
+    
+    if (config_count == 0) {
+        cJSON_Delete(config_objects_array);
+        snprintf(error_message, error_size, "invalid: config_update command requires at least one config object");
+        return -1;
+    }
+    
+    // Begin transaction for atomic config updates
+    int rc = sqlite3_exec(g_db, "BEGIN IMMEDIATE TRANSACTION", NULL, NULL, NULL);
+    if (rc != SQLITE_OK) {
+        cJSON_Delete(config_objects_array);
+        snprintf(error_message, error_size, "failed to begin config update transaction");
+        return -1;
+    }
+    
+    int updates_applied = 0;
+    int validation_errors = 0;
+    char first_validation_error[512] = {0};  // Track first specific validation error
+    char first_error_field[128] = {0};       // Track which field failed first
+    cJSON* processed_configs = cJSON_CreateArray();
+    if (!processed_configs) {
+        sqlite3_exec(g_db, "ROLLBACK", NULL, NULL, NULL);
+        cJSON_Delete(config_objects_array);
+        snprintf(error_message, error_size, "failed to create response array");
+        return -1;
+    }
+    
+    // Process each config object in the array
+    cJSON* config_obj = NULL;
+    cJSON_ArrayForEach(config_obj, config_objects_array) {
+        if (!cJSON_IsObject(config_obj)) {
+            log_warning("Skipping non-object item in config objects array");
+            continue;
+        }
+        
+        // Extract required fields from config object
+        cJSON* key_obj = cJSON_GetObjectItem(config_obj, "key");
+        cJSON* value_obj = cJSON_GetObjectItem(config_obj, "value");
+        cJSON* data_type_obj = cJSON_GetObjectItem(config_obj, "data_type");
+        cJSON* category_obj = cJSON_GetObjectItem(config_obj, "category");
+        
+        if (!key_obj || !cJSON_IsString(key_obj) ||
+            !value_obj || !cJSON_IsString(value_obj)) {
+            log_error("Config object missing required key or value fields");
+            validation_errors++;
+            continue;
+        }
+        
+        const char* key = cJSON_GetStringValue(key_obj);
+        const char* value = cJSON_GetStringValue(value_obj);
+        const char* data_type = data_type_obj && cJSON_IsString(data_type_obj) ? 
+                               cJSON_GetStringValue(data_type_obj) : "string";
+        const char* category = category_obj && cJSON_IsString(category_obj) ? 
+                              cJSON_GetStringValue(category_obj) : "general";
+        
+        log_info("Processing config object");
+        printf("  Key: %s\n", key);
+        printf("  Value: %s\n", value);
+        printf("  Data type: %s\n", data_type);
+        printf("  Category: %s\n", category);
+        
+        // Validate the configuration field before updating
+        char validation_error[512];
+        if (validate_config_field(key, value, validation_error, sizeof(validation_error)) != 0) {
+            log_error("Config field validation failed");
+            printf("  Validation error: %s\n", validation_error);
+            validation_errors++;
+            
+            // Capture first validation error for enhanced error message
+            if (validation_errors == 1) {
+                strncpy(first_validation_error, validation_error, sizeof(first_validation_error) - 1);
+                first_validation_error[sizeof(first_validation_error) - 1] = '\0';
+                strncpy(first_error_field, key, sizeof(first_error_field) - 1);
+                first_error_field[sizeof(first_error_field) - 1] = '\0';
+            }
+            
+            // Add failed config to response array
+            cJSON* failed_config = cJSON_CreateObject();
+            cJSON_AddStringToObject(failed_config, "key", key);
+            cJSON_AddStringToObject(failed_config, "value", value);
+            cJSON_AddStringToObject(failed_config, "data_type", data_type);
+            cJSON_AddStringToObject(failed_config, "category", category);
+            cJSON_AddStringToObject(failed_config, "status", "validation_failed");
+            cJSON_AddStringToObject(failed_config, "error", validation_error);
+            cJSON_AddItemToArray(processed_configs, failed_config);
+            continue;
+        }
+        
+        // Check if the config key exists in the table
+        const char* check_sql = "SELECT COUNT(*) FROM config WHERE key = ?";
+        sqlite3_stmt* check_stmt;
+        
+        int check_rc = sqlite3_prepare_v2(g_db, check_sql, -1, &check_stmt, NULL);
+        if (check_rc != SQLITE_OK) {
+            log_error("Failed to prepare config existence check");
+            validation_errors++;
+            continue;
+        }
+        
+        sqlite3_bind_text(check_stmt, 1, key, -1, SQLITE_STATIC);
+        
+        int config_exists = 0;
+        if (sqlite3_step(check_stmt) == SQLITE_ROW) {
+            config_exists = sqlite3_column_int(check_stmt, 0) > 0;
+        }
+        sqlite3_finalize(check_stmt);
+        
+        if (!config_exists) {
+            log_error("Configuration key not found");
+            printf("  Key not found: %s\n", key);
+            validation_errors++;
+            
+            // Add failed config to response array
+            cJSON* failed_config = cJSON_CreateObject();
+            cJSON_AddStringToObject(failed_config, "key", key);
+            cJSON_AddStringToObject(failed_config, "value", value);
+            cJSON_AddStringToObject(failed_config, "data_type", data_type);
+            cJSON_AddStringToObject(failed_config, "category", category);
+            cJSON_AddStringToObject(failed_config, "status", "key_not_found");
+            cJSON_AddStringToObject(failed_config, "error", "configuration key not found in database");
+            cJSON_AddItemToArray(processed_configs, failed_config);
+            continue;
+        }
+        
+        // Update the configuration value in the table
+        if (update_config_in_table(key, value) == 0) {
+            updates_applied++;
+            
+            // Add successful config to response array
+            cJSON* success_config = cJSON_CreateObject();
+            cJSON_AddStringToObject(success_config, "key", key);
+            cJSON_AddStringToObject(success_config, "value", value);
+            cJSON_AddStringToObject(success_config, "data_type", data_type);
+            cJSON_AddStringToObject(success_config, "category", category);
+            cJSON_AddStringToObject(success_config, "status", "updated");
+            cJSON_AddItemToArray(processed_configs, success_config);
+            
+            log_success("Config field updated successfully");
+            printf("  Updated: %s = %s\n", key, value);
+        } else {
+            log_error("Failed to update config field in database");
+            printf("  Failed to update: %s = %s\n", key, value);
+            validation_errors++;
+            
+            // Add failed config to response array
+            cJSON* failed_config = cJSON_CreateObject();
+            cJSON_AddStringToObject(failed_config, "key", key);
+            cJSON_AddStringToObject(failed_config, "value", value);
+            cJSON_AddStringToObject(failed_config, "data_type", data_type);
+            cJSON_AddStringToObject(failed_config, "category", category);
+            cJSON_AddStringToObject(failed_config, "status", "database_error");
+            cJSON_AddStringToObject(failed_config, "error", "failed to update configuration in database");
+            cJSON_AddItemToArray(processed_configs, failed_config);
+        }
+    }
+    
+    // Clean up config objects array
+    cJSON_Delete(config_objects_array);
+    
+    // Determine transaction outcome
+    if (updates_applied > 0 && validation_errors == 0) {
+        // All updates successful
+        sqlite3_exec(g_db, "COMMIT", NULL, NULL, NULL);
+        invalidate_config_cache();
+        
+        char success_msg[256];
+        snprintf(success_msg, sizeof(success_msg), "Applied %d configuration updates successfully", updates_applied);
+        log_success(success_msg);
+    } else if (updates_applied > 0 && validation_errors > 0) {
+        // Partial success - rollback for atomic behavior
+        sqlite3_exec(g_db, "ROLLBACK", NULL, NULL, NULL);
+        
+        char error_msg[256];
+        snprintf(error_msg, sizeof(error_msg), "Config update failed: %d validation errors (atomic rollback)", validation_errors);
+        log_error(error_msg);
+        
+        // Build error response with validation details
+        cJSON* error_response = cJSON_CreateObject();
+        cJSON_AddStringToObject(error_response, "query_type", "config_update");
+        cJSON_AddStringToObject(error_response, "status", "error");
+        // Create enhanced error message with specific validation details
+        char enhanced_error_message[1024];
+        if (strlen(first_validation_error) > 0 && strlen(first_error_field) > 0) {
+            snprintf(enhanced_error_message, sizeof(enhanced_error_message),
+                    "field validation failed: %s - %s",
+                    first_error_field, first_validation_error);
+        } else {
+            snprintf(enhanced_error_message, sizeof(enhanced_error_message),
+                    "field validation failed: atomic rollback performed");
+        }
+        cJSON_AddStringToObject(error_response, "error", enhanced_error_message);
+        cJSON_AddNumberToObject(error_response, "validation_errors", validation_errors);
+        cJSON_AddNumberToObject(error_response, "timestamp", (double)time(NULL));
+        cJSON_AddItemToObject(error_response, "data", processed_configs);
+        
+        // Get admin pubkey from event for error response
+        cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
+        const char* admin_pubkey = pubkey_obj ? cJSON_GetStringValue(pubkey_obj) : NULL;
+        
+        if (admin_pubkey) {
+            // Send error response as signed kind 23457 event
+            if (send_admin_response_event(error_response, admin_pubkey, wsi) == 0) {
+                log_info("Config update validation error response sent successfully");
+                cJSON_Delete(error_response);
+                return 0; // Return success after sending error response
+            }
+        }
+        
+        cJSON_Delete(error_response);
+        snprintf(error_message, error_size, "validation failed: %d errors, atomic rollback performed", validation_errors);
+        return -1;
+    } else {
+        // No updates applied
+        sqlite3_exec(g_db, "ROLLBACK", NULL, NULL, NULL);
+        
+        // Build error response for no valid updates
+        cJSON* error_response = cJSON_CreateObject();
+        cJSON_AddStringToObject(error_response, "query_type", "config_update");
+        cJSON_AddStringToObject(error_response, "status", "error");
+        cJSON_AddStringToObject(error_response, "error", "no valid configuration updates found");
+        cJSON_AddNumberToObject(error_response, "timestamp", (double)time(NULL));
+        cJSON_AddItemToObject(error_response, "data", processed_configs);
+        
+        // Get admin pubkey from event for error response
+        cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
+        const char* admin_pubkey = pubkey_obj ? cJSON_GetStringValue(pubkey_obj) : NULL;
+        
+        if (admin_pubkey) {
+            // Send error response as signed kind 23457 event
+            if (send_admin_response_event(error_response, admin_pubkey, wsi) == 0) {
+                log_info("Config update 'no valid updates' error response sent successfully");
+                cJSON_Delete(error_response);
+                return 0; // Return success after sending error response
+            }
+        }
+        
+        cJSON_Delete(error_response);
+        snprintf(error_message, error_size, "no valid configuration updates found");
+        return -1;
+    }
+    
+    // Build response with query_type for frontend routing
+    cJSON* response = cJSON_CreateObject();
+    cJSON_AddStringToObject(response, "query_type", "config_update");
+    cJSON_AddStringToObject(response, "command", "config_update");
+    cJSON_AddNumberToObject(response, "configs_processed", updates_applied);
+    cJSON_AddNumberToObject(response, "total_configs", config_count);
+    cJSON_AddStringToObject(response, "status", "success");
+    cJSON_AddNumberToObject(response, "timestamp", (double)time(NULL));
+    cJSON_AddItemToObject(response, "processed_configs", processed_configs);
+    
+    printf("Config update completed: %d/%d configs updated successfully\n", updates_applied, config_count);
+    
+    // Get admin pubkey from event for response
+    cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
+    const char* admin_pubkey = pubkey_obj ? cJSON_GetStringValue(pubkey_obj) : NULL;
+    
+    if (!admin_pubkey) {
+        cJSON_Delete(response);
+        snprintf(error_message, error_size, "missing admin pubkey for response");
+        return -1;
+    }
+    
+    // Send response as signed kind 23457 event
+    if (send_admin_response_event(response, admin_pubkey, wsi) == 0) {
+        log_success("Config update command completed successfully with signed response");
+        printf("  Response query_type: config_update\n");
+        cJSON_Delete(response);
+        return 0;
+    }
+    
+    cJSON_Delete(response);
+    snprintf(error_message, error_size, "failed to send config update response");
+    return -1;
+}
+
 
 
 
@@ -3580,7 +4148,7 @@ int process_startup_config_event(const cJSON* event) {
     
     // Validate event structure first
     cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
-    if (!kind_obj || cJSON_GetNumberValue(kind_obj) != 23455) {
+    if (!kind_obj || cJSON_GetNumberValue(kind_obj) != 33334) {
         log_error("Invalid event kind for startup configuration");
         return -1;
     }
@@ -3709,7 +4277,7 @@ cJSON* generate_config_event_from_table(void) {
     cJSON_AddStringToObject(event, "id", "synthetic_config_event_id");
     cJSON_AddStringToObject(event, "pubkey", relay_pubkey); // Use relay pubkey as event author
     cJSON_AddNumberToObject(event, "created_at", (double)time(NULL));
-    cJSON_AddNumberToObject(event, "kind", 23455);
+    cJSON_AddNumberToObject(event, "kind", 33334);
     cJSON_AddStringToObject(event, "content", "C Nostr Relay Configuration");
     cJSON_AddStringToObject(event, "sig", "synthetic_signature");
     
@@ -3790,7 +4358,7 @@ int req_filter_requests_config_events(const cJSON* filter) {
     cJSON* kind_item = NULL;
     cJSON_ArrayForEach(kind_item, kinds) {
         int kind_val = (int)cJSON_GetNumberValue(kind_item);
-        if (cJSON_IsNumber(kind_item) && (kind_val == 23455 || kind_val == 23456)) {
+        if (cJSON_IsNumber(kind_item) && kind_val == 33334) {
             return 1;
         }
     }

src/nip009.c

@@ -0,0 +1,313 @@
+#define _GNU_SOURCE
+
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+//             NIP-09 EVENT DELETION REQUEST HANDLING
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+#include <cjson/cJSON.h>
+#include <sqlite3.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdio.h>
+#include <printf.h>
+
+// Forward declarations for logging functions
+void log_warning(const char* message);
+void log_info(const char* message);
+
+// Forward declaration for database functions
+int store_event(cJSON* event);
+
+// Forward declarations for deletion functions
+int delete_events_by_id(const char* requester_pubkey, cJSON* event_ids);
+int delete_events_by_address(const char* requester_pubkey, cJSON* addresses, long deletion_timestamp);
+
+// Global database variable
+extern sqlite3* g_db;
+
+
+// Handle NIP-09 deletion request event (kind 5)
+int handle_deletion_request(cJSON* event, char* error_message, size_t error_size) {
+    if (!event) {
+        snprintf(error_message, error_size, "invalid: null deletion request");
+        return -1;
+    }
+    
+    // Extract event details
+    cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
+    cJSON* pubkey_obj = cJSON_GetObjectItem(event, "pubkey");
+    cJSON* created_at_obj = cJSON_GetObjectItem(event, "created_at");
+    cJSON* tags_obj = cJSON_GetObjectItem(event, "tags");
+    cJSON* content_obj = cJSON_GetObjectItem(event, "content");
+    cJSON* event_id_obj = cJSON_GetObjectItem(event, "id");
+    
+    if (!kind_obj || !pubkey_obj || !created_at_obj || !tags_obj || !event_id_obj) {
+        snprintf(error_message, error_size, "invalid: incomplete deletion request");
+        return -1;
+    }
+    
+    int kind = (int)cJSON_GetNumberValue(kind_obj);
+    if (kind != 5) {
+        snprintf(error_message, error_size, "invalid: not a deletion request");
+        return -1;
+    }
+    
+    const char* requester_pubkey = cJSON_GetStringValue(pubkey_obj);
+    // Extract deletion event ID and reason (for potential logging)
+    const char* deletion_event_id = cJSON_GetStringValue(event_id_obj);
+    const char* reason = content_obj ? cJSON_GetStringValue(content_obj) : "";
+    (void)deletion_event_id; // Mark as intentionally unused for now
+    (void)reason;           // Mark as intentionally unused for now
+    long deletion_timestamp = (long)cJSON_GetNumberValue(created_at_obj);
+    
+    if (!cJSON_IsArray(tags_obj)) {
+        snprintf(error_message, error_size, "invalid: deletion request tags must be an array");
+        return -1;
+    }
+    
+    // Collect event IDs and addresses from tags
+    cJSON* event_ids = cJSON_CreateArray();
+    cJSON* addresses = cJSON_CreateArray();
+    cJSON* kinds_to_delete = cJSON_CreateArray();
+    
+    int deletion_targets_found = 0;
+    
+    cJSON* tag = NULL;
+    cJSON_ArrayForEach(tag, tags_obj) {
+        if (!cJSON_IsArray(tag) || cJSON_GetArraySize(tag) < 2) {
+            continue;
+        }
+        
+        cJSON* tag_name = cJSON_GetArrayItem(tag, 0);
+        cJSON* tag_value = cJSON_GetArrayItem(tag, 1);
+        
+        if (!cJSON_IsString(tag_name) || !cJSON_IsString(tag_value)) {
+            continue;
+        }
+        
+        const char* name = cJSON_GetStringValue(tag_name);
+        const char* value = cJSON_GetStringValue(tag_value);
+        
+        if (strcmp(name, "e") == 0) {
+            // Event ID reference
+            cJSON_AddItemToArray(event_ids, cJSON_CreateString(value));
+            deletion_targets_found++;
+        } else if (strcmp(name, "a") == 0) {
+            // Addressable event reference (kind:pubkey:d-identifier)
+            cJSON_AddItemToArray(addresses, cJSON_CreateString(value));
+            deletion_targets_found++;
+        } else if (strcmp(name, "k") == 0) {
+            // Kind hint - store for validation but not required
+            int kind_hint = atoi(value);
+            if (kind_hint > 0) {
+                cJSON_AddItemToArray(kinds_to_delete, cJSON_CreateNumber(kind_hint));
+            }
+        }
+    }
+    
+    if (deletion_targets_found == 0) {
+        cJSON_Delete(event_ids);
+        cJSON_Delete(addresses);
+        cJSON_Delete(kinds_to_delete);
+        snprintf(error_message, error_size, "invalid: deletion request must contain 'e' or 'a' tags");
+        return -1;
+    }
+    
+    int deleted_count = 0;
+    
+    // Process event ID deletions
+    if (cJSON_GetArraySize(event_ids) > 0) {
+        int result = delete_events_by_id(requester_pubkey, event_ids);
+        if (result > 0) {
+            deleted_count += result;
+        }
+    }
+    
+    // Process addressable event deletions
+    if (cJSON_GetArraySize(addresses) > 0) {
+        int result = delete_events_by_address(requester_pubkey, addresses, deletion_timestamp);
+        if (result > 0) {
+            deleted_count += result;
+        }
+    }
+    
+    // Clean up
+    cJSON_Delete(event_ids);
+    cJSON_Delete(addresses);
+    cJSON_Delete(kinds_to_delete);
+    
+    // Store the deletion request itself (it should be kept according to NIP-09)
+    if (store_event(event) != 0) {
+        log_warning("Failed to store deletion request event");
+    }
+    
+    char debug_msg[256];
+    snprintf(debug_msg, sizeof(debug_msg), "Deletion request processed: %d events deleted", deleted_count);
+    log_info(debug_msg);
+    
+    error_message[0] = '\0'; // Success - empty error message
+    return 0;
+}
+
+// Delete events by ID (with pubkey authorization)
+int delete_events_by_id(const char* requester_pubkey, cJSON* event_ids) {
+    if (!g_db || !requester_pubkey || !event_ids || !cJSON_IsArray(event_ids)) {
+        return 0;
+    }
+    
+    int deleted_count = 0;
+    
+    cJSON* event_id = NULL;
+    cJSON_ArrayForEach(event_id, event_ids) {
+        if (!cJSON_IsString(event_id)) {
+            continue;
+        }
+        
+        const char* id = cJSON_GetStringValue(event_id);
+        
+        // First check if event exists and if requester is authorized
+        const char* check_sql = "SELECT pubkey FROM events WHERE id = ?";
+        sqlite3_stmt* check_stmt;
+        
+        int rc = sqlite3_prepare_v2(g_db, check_sql, -1, &check_stmt, NULL);
+        if (rc != SQLITE_OK) {
+            continue;
+        }
+        
+        sqlite3_bind_text(check_stmt, 1, id, -1, SQLITE_STATIC);
+        
+        if (sqlite3_step(check_stmt) == SQLITE_ROW) {
+            const char* event_pubkey = (char*)sqlite3_column_text(check_stmt, 0);
+            
+            // Only delete if the requester is the author
+            if (event_pubkey && strcmp(event_pubkey, requester_pubkey) == 0) {
+                sqlite3_finalize(check_stmt);
+                
+                // Delete the event
+                const char* delete_sql = "DELETE FROM events WHERE id = ? AND pubkey = ?";
+                sqlite3_stmt* delete_stmt;
+                
+                rc = sqlite3_prepare_v2(g_db, delete_sql, -1, &delete_stmt, NULL);
+                if (rc == SQLITE_OK) {
+                    sqlite3_bind_text(delete_stmt, 1, id, -1, SQLITE_STATIC);
+                    sqlite3_bind_text(delete_stmt, 2, requester_pubkey, -1, SQLITE_STATIC);
+                    
+                    if (sqlite3_step(delete_stmt) == SQLITE_DONE && sqlite3_changes(g_db) > 0) {
+                        deleted_count++;
+                        
+                        char debug_msg[128];
+                        snprintf(debug_msg, sizeof(debug_msg), "Deleted event by ID: %.16s...", id);
+                        log_info(debug_msg);
+                    }
+                    sqlite3_finalize(delete_stmt);
+                }
+            } else {
+                sqlite3_finalize(check_stmt);
+                char warning_msg[128];
+                snprintf(warning_msg, sizeof(warning_msg), "Unauthorized deletion attempt for event: %.16s...", id);
+                log_warning(warning_msg);
+            }
+        } else {
+            sqlite3_finalize(check_stmt);
+            char debug_msg[128];
+            snprintf(debug_msg, sizeof(debug_msg), "Event not found for deletion: %.16s...", id);
+            log_info(debug_msg);
+        }
+    }
+    
+    return deleted_count;
+}
+
+// Delete events by addressable reference (kind:pubkey:d-identifier)
+int delete_events_by_address(const char* requester_pubkey, cJSON* addresses, long deletion_timestamp) {
+    if (!g_db || !requester_pubkey || !addresses || !cJSON_IsArray(addresses)) {
+        return 0;
+    }
+    
+    int deleted_count = 0;
+    
+    cJSON* address = NULL;
+    cJSON_ArrayForEach(address, addresses) {
+        if (!cJSON_IsString(address)) {
+            continue;
+        }
+        
+        const char* addr = cJSON_GetStringValue(address);
+        
+        // Parse address format: kind:pubkey:d-identifier
+        char* addr_copy = strdup(addr);
+        if (!addr_copy) continue;
+        
+        char* kind_str = strtok(addr_copy, ":");
+        char* pubkey_str = strtok(NULL, ":");
+        char* d_identifier = strtok(NULL, ":");
+        
+        if (!kind_str || !pubkey_str) {
+            free(addr_copy);
+            continue;
+        }
+        
+        int kind = atoi(kind_str);
+        
+        // Only delete if the requester is the author
+        if (strcmp(pubkey_str, requester_pubkey) != 0) {
+            free(addr_copy);
+            char warning_msg[128];
+            snprintf(warning_msg, sizeof(warning_msg), "Unauthorized deletion attempt for address: %.32s...", addr);
+            log_warning(warning_msg);
+            continue;
+        }
+        
+        // Build deletion query based on whether we have d-identifier
+        const char* delete_sql;
+        sqlite3_stmt* delete_stmt;
+        
+        if (d_identifier && strlen(d_identifier) > 0) {
+            // Delete specific addressable event with d-tag
+            delete_sql = "DELETE FROM events WHERE kind = ? AND pubkey = ? AND created_at <= ? "
+                        "AND json_extract(tags, '$[*]') LIKE '%[\"d\",\"' || ? || '\"]%'";
+        } else {
+            // Delete all events of this kind by this author up to deletion timestamp
+            delete_sql = "DELETE FROM events WHERE kind = ? AND pubkey = ? AND created_at <= ?";
+        }
+        
+        int rc = sqlite3_prepare_v2(g_db, delete_sql, -1, &delete_stmt, NULL);
+        if (rc == SQLITE_OK) {
+            sqlite3_bind_int(delete_stmt, 1, kind);
+            sqlite3_bind_text(delete_stmt, 2, requester_pubkey, -1, SQLITE_STATIC);
+            sqlite3_bind_int64(delete_stmt, 3, deletion_timestamp);
+            
+            if (d_identifier && strlen(d_identifier) > 0) {
+                sqlite3_bind_text(delete_stmt, 4, d_identifier, -1, SQLITE_STATIC);
+            }
+            
+            if (sqlite3_step(delete_stmt) == SQLITE_DONE) {
+                int changes = sqlite3_changes(g_db);
+                if (changes > 0) {
+                    deleted_count += changes;
+                    
+                    char debug_msg[128];
+                    snprintf(debug_msg, sizeof(debug_msg), "Deleted %d events by address: %.32s...", changes, addr);
+                    log_info(debug_msg);
+                }
+            }
+            sqlite3_finalize(delete_stmt);
+        }
+        
+        free(addr_copy);
+    }
+    
+    return deleted_count;
+}
+
+// Mark event as deleted (alternative to hard deletion - not used in current implementation)
+int mark_event_as_deleted(const char* event_id, const char* deletion_event_id, const char* reason) {
+    (void)event_id; (void)deletion_event_id; (void)reason; // Suppress unused warnings
+    
+    // This function could be used if we wanted to implement soft deletion
+    // For now, NIP-09 implementation uses hard deletion as specified
+    
+    return 0;
+}

src/nip011.c

@@ -0,0 +1,454 @@
+// NIP-11 Relay Information Document module
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include <libwebsockets.h>
+#include "../nostr_core_lib/cjson/cJSON.h"
+#include "config.h"
+
+// Forward declarations for logging functions
+void log_info(const char* message);
+void log_success(const char* message);
+void log_error(const char* message);
+void log_warning(const char* message);
+
+// Forward declarations for configuration functions
+const char* get_config_value(const char* key);
+int get_config_int(const char* key, int default_value);
+int get_config_bool(const char* key, int default_value);
+
+// Forward declarations for global cache access
+extern unified_config_cache_t g_unified_cache;
+
+// Forward declarations for constants (defined in config.h and other headers)
+#define HTTP_STATUS_OK 200
+#define HTTP_STATUS_NOT_ACCEPTABLE 406
+#define HTTP_STATUS_INTERNAL_SERVER_ERROR 500
+
+
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+//             NIP-11 RELAY INFORMATION DOCUMENT
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+
+// Initialize relay information using configuration system
+void init_relay_info() {
+    // Get all config values first (without holding mutex to avoid deadlock)
+    const char* relay_name = get_config_value("relay_name");
+    const char* relay_description = get_config_value("relay_description");
+    const char* relay_software = get_config_value("relay_software");
+    const char* relay_version = get_config_value("relay_version");
+    const char* relay_contact = get_config_value("relay_contact");
+    const char* relay_pubkey = get_config_value("relay_pubkey");
+    
+    // Get config values for limitations
+    int max_message_length = get_config_int("max_message_length", 16384);
+    int max_subscriptions_per_client = get_config_int("max_subscriptions_per_client", 20);
+    int max_limit = get_config_int("max_limit", 5000);
+    int max_event_tags = get_config_int("max_event_tags", 100);
+    int max_content_length = get_config_int("max_content_length", 8196);
+    int default_limit = get_config_int("default_limit", 500);
+    int admin_enabled = get_config_bool("admin_enabled", 0);
+    
+    pthread_mutex_lock(&g_unified_cache.cache_lock);
+    
+    // Update relay information fields
+    if (relay_name) {
+        strncpy(g_unified_cache.relay_info.name, relay_name, sizeof(g_unified_cache.relay_info.name) - 1);
+    } else {
+        strncpy(g_unified_cache.relay_info.name, "C Nostr Relay", sizeof(g_unified_cache.relay_info.name) - 1);
+    }
+    
+    if (relay_description) {
+        strncpy(g_unified_cache.relay_info.description, relay_description, sizeof(g_unified_cache.relay_info.description) - 1);
+    } else {
+        strncpy(g_unified_cache.relay_info.description, "A high-performance Nostr relay implemented in C with SQLite storage", sizeof(g_unified_cache.relay_info.description) - 1);
+    }
+    
+    if (relay_software) {
+        strncpy(g_unified_cache.relay_info.software, relay_software, sizeof(g_unified_cache.relay_info.software) - 1);
+    } else {
+        strncpy(g_unified_cache.relay_info.software, "https://git.laantungir.net/laantungir/c-relay.git", sizeof(g_unified_cache.relay_info.software) - 1);
+    }
+    
+    if (relay_version) {
+        strncpy(g_unified_cache.relay_info.version, relay_version, sizeof(g_unified_cache.relay_info.version) - 1);
+    } else {
+        strncpy(g_unified_cache.relay_info.version, "0.2.0", sizeof(g_unified_cache.relay_info.version) - 1);
+    }
+    
+    if (relay_contact) {
+        strncpy(g_unified_cache.relay_info.contact, relay_contact, sizeof(g_unified_cache.relay_info.contact) - 1);
+    }
+    
+    if (relay_pubkey) {
+        strncpy(g_unified_cache.relay_info.pubkey, relay_pubkey, sizeof(g_unified_cache.relay_info.pubkey) - 1);
+    }
+    
+    // Initialize supported NIPs array
+    g_unified_cache.relay_info.supported_nips = cJSON_CreateArray();
+    if (g_unified_cache.relay_info.supported_nips) {
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(1));   // NIP-01: Basic protocol
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(9));   // NIP-09: Event deletion
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(11));  // NIP-11: Relay information
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(13));  // NIP-13: Proof of Work
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(15));  // NIP-15: EOSE
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(20));  // NIP-20: Command results
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(40));  // NIP-40: Expiration Timestamp
+        cJSON_AddItemToArray(g_unified_cache.relay_info.supported_nips, cJSON_CreateNumber(42));  // NIP-42: Authentication
+    }
+    
+    // Initialize server limitations using configuration
+    g_unified_cache.relay_info.limitation = cJSON_CreateObject();
+    if (g_unified_cache.relay_info.limitation) {
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "max_message_length", max_message_length);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "max_subscriptions", max_subscriptions_per_client);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "max_limit", max_limit);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "max_subid_length", SUBSCRIPTION_ID_MAX_LENGTH);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "max_event_tags", max_event_tags);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "max_content_length", max_content_length);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "min_pow_difficulty", g_unified_cache.pow_config.min_pow_difficulty);
+        cJSON_AddBoolToObject(g_unified_cache.relay_info.limitation, "auth_required", admin_enabled ? cJSON_True : cJSON_False);
+        cJSON_AddBoolToObject(g_unified_cache.relay_info.limitation, "payment_required", cJSON_False);
+        cJSON_AddBoolToObject(g_unified_cache.relay_info.limitation, "restricted_writes", cJSON_False);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "created_at_lower_limit", 0);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "created_at_upper_limit", 2147483647);
+        cJSON_AddNumberToObject(g_unified_cache.relay_info.limitation, "default_limit", default_limit);
+    }
+    
+    // Initialize empty retention policies (can be configured later)
+    g_unified_cache.relay_info.retention = cJSON_CreateArray();
+    
+    // Initialize language tags - set to global for now
+    g_unified_cache.relay_info.language_tags = cJSON_CreateArray();
+    if (g_unified_cache.relay_info.language_tags) {
+        cJSON_AddItemToArray(g_unified_cache.relay_info.language_tags, cJSON_CreateString("*"));
+    }
+    
+    // Initialize relay countries - set to global for now
+    g_unified_cache.relay_info.relay_countries = cJSON_CreateArray();
+    if (g_unified_cache.relay_info.relay_countries) {
+        cJSON_AddItemToArray(g_unified_cache.relay_info.relay_countries, cJSON_CreateString("*"));
+    }
+    
+    // Initialize content tags as empty array
+    g_unified_cache.relay_info.tags = cJSON_CreateArray();
+    
+    // Initialize fees as empty object (no payment required by default)
+    g_unified_cache.relay_info.fees = cJSON_CreateObject();
+    
+    pthread_mutex_unlock(&g_unified_cache.cache_lock);
+    
+    log_success("Relay information initialized with default values");
+}
+
+// Clean up relay information JSON objects
+void cleanup_relay_info() {
+    pthread_mutex_lock(&g_unified_cache.cache_lock);
+    if (g_unified_cache.relay_info.supported_nips) {
+        cJSON_Delete(g_unified_cache.relay_info.supported_nips);
+        g_unified_cache.relay_info.supported_nips = NULL;
+    }
+    if (g_unified_cache.relay_info.limitation) {
+        cJSON_Delete(g_unified_cache.relay_info.limitation);
+        g_unified_cache.relay_info.limitation = NULL;
+    }
+    if (g_unified_cache.relay_info.retention) {
+        cJSON_Delete(g_unified_cache.relay_info.retention);
+        g_unified_cache.relay_info.retention = NULL;
+    }
+    if (g_unified_cache.relay_info.language_tags) {
+        cJSON_Delete(g_unified_cache.relay_info.language_tags);
+        g_unified_cache.relay_info.language_tags = NULL;
+    }
+    if (g_unified_cache.relay_info.relay_countries) {
+        cJSON_Delete(g_unified_cache.relay_info.relay_countries);
+        g_unified_cache.relay_info.relay_countries = NULL;
+    }
+    if (g_unified_cache.relay_info.tags) {
+        cJSON_Delete(g_unified_cache.relay_info.tags);
+        g_unified_cache.relay_info.tags = NULL;
+    }
+    if (g_unified_cache.relay_info.fees) {
+        cJSON_Delete(g_unified_cache.relay_info.fees);
+        g_unified_cache.relay_info.fees = NULL;
+    }
+    pthread_mutex_unlock(&g_unified_cache.cache_lock);
+}
+
+// Generate NIP-11 compliant JSON document
+cJSON* generate_relay_info_json() {
+    cJSON* info = cJSON_CreateObject();
+    if (!info) {
+        log_error("Failed to create relay info JSON object");
+        return NULL;
+    }
+    
+    pthread_mutex_lock(&g_unified_cache.cache_lock);
+    
+    // Add basic relay information
+    if (strlen(g_unified_cache.relay_info.name) > 0) {
+        cJSON_AddStringToObject(info, "name", g_unified_cache.relay_info.name);
+    }
+    if (strlen(g_unified_cache.relay_info.description) > 0) {
+        cJSON_AddStringToObject(info, "description", g_unified_cache.relay_info.description);
+    }
+    if (strlen(g_unified_cache.relay_info.banner) > 0) {
+        cJSON_AddStringToObject(info, "banner", g_unified_cache.relay_info.banner);
+    }
+    if (strlen(g_unified_cache.relay_info.icon) > 0) {
+        cJSON_AddStringToObject(info, "icon", g_unified_cache.relay_info.icon);
+    }
+    if (strlen(g_unified_cache.relay_info.pubkey) > 0) {
+        cJSON_AddStringToObject(info, "pubkey", g_unified_cache.relay_info.pubkey);
+    }
+    if (strlen(g_unified_cache.relay_info.contact) > 0) {
+        cJSON_AddStringToObject(info, "contact", g_unified_cache.relay_info.contact);
+    }
+    
+    // Add supported NIPs
+    if (g_unified_cache.relay_info.supported_nips) {
+        cJSON_AddItemToObject(info, "supported_nips", cJSON_Duplicate(g_unified_cache.relay_info.supported_nips, 1));
+    }
+    
+    // Add software information
+    if (strlen(g_unified_cache.relay_info.software) > 0) {
+        cJSON_AddStringToObject(info, "software", g_unified_cache.relay_info.software);
+    }
+    if (strlen(g_unified_cache.relay_info.version) > 0) {
+        cJSON_AddStringToObject(info, "version", g_unified_cache.relay_info.version);
+    }
+    
+    // Add policies
+    if (strlen(g_unified_cache.relay_info.privacy_policy) > 0) {
+        cJSON_AddStringToObject(info, "privacy_policy", g_unified_cache.relay_info.privacy_policy);
+    }
+    if (strlen(g_unified_cache.relay_info.terms_of_service) > 0) {
+        cJSON_AddStringToObject(info, "terms_of_service", g_unified_cache.relay_info.terms_of_service);
+    }
+    if (strlen(g_unified_cache.relay_info.posting_policy) > 0) {
+        cJSON_AddStringToObject(info, "posting_policy", g_unified_cache.relay_info.posting_policy);
+    }
+    
+    // Add server limitations
+    if (g_unified_cache.relay_info.limitation) {
+        cJSON_AddItemToObject(info, "limitation", cJSON_Duplicate(g_unified_cache.relay_info.limitation, 1));
+    }
+    
+    // Add retention policies if configured
+    if (g_unified_cache.relay_info.retention && cJSON_GetArraySize(g_unified_cache.relay_info.retention) > 0) {
+        cJSON_AddItemToObject(info, "retention", cJSON_Duplicate(g_unified_cache.relay_info.retention, 1));
+    }
+    
+    // Add geographical and language information
+    if (g_unified_cache.relay_info.relay_countries) {
+        cJSON_AddItemToObject(info, "relay_countries", cJSON_Duplicate(g_unified_cache.relay_info.relay_countries, 1));
+    }
+    if (g_unified_cache.relay_info.language_tags) {
+        cJSON_AddItemToObject(info, "language_tags", cJSON_Duplicate(g_unified_cache.relay_info.language_tags, 1));
+    }
+    if (g_unified_cache.relay_info.tags && cJSON_GetArraySize(g_unified_cache.relay_info.tags) > 0) {
+        cJSON_AddItemToObject(info, "tags", cJSON_Duplicate(g_unified_cache.relay_info.tags, 1));
+    }
+    
+    // Add payment information if configured
+    if (strlen(g_unified_cache.relay_info.payments_url) > 0) {
+        cJSON_AddStringToObject(info, "payments_url", g_unified_cache.relay_info.payments_url);
+    }
+    if (g_unified_cache.relay_info.fees && cJSON_GetObjectItem(g_unified_cache.relay_info.fees, "admission")) {
+        cJSON_AddItemToObject(info, "fees", cJSON_Duplicate(g_unified_cache.relay_info.fees, 1));
+    }
+    
+    pthread_mutex_unlock(&g_unified_cache.cache_lock);
+    
+    return info;
+}
+
+// NIP-11 HTTP session data structure for managing buffer lifetime
+struct nip11_session_data {
+    char* json_buffer;
+    size_t json_length;
+    int headers_sent;
+    int body_sent;
+};
+
+// Handle NIP-11 HTTP request with proper asynchronous buffer management
+int handle_nip11_http_request(struct lws* wsi, const char* accept_header) {
+    log_info("Handling NIP-11 relay information request");
+    
+    // Check if client accepts application/nostr+json
+    int accepts_nostr_json = 0;
+    if (accept_header) {
+        if (strstr(accept_header, "application/nostr+json") != NULL) {
+            accepts_nostr_json = 1;
+        }
+    }
+    
+    if (!accepts_nostr_json) {
+        log_warning("HTTP request without proper Accept header for NIP-11");
+        // Return 406 Not Acceptable
+        unsigned char buf[LWS_PRE + 256];
+        unsigned char *p = &buf[LWS_PRE];
+        unsigned char *start = p;
+        unsigned char *end = &buf[sizeof(buf) - 1];
+
+        if (lws_add_http_header_status(wsi, HTTP_STATUS_NOT_ACCEPTABLE, &p, end)) {
+            return -1;
+        }
+        if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE, (unsigned char*)"text/plain", 10, &p, end)) {
+            return -1;
+        }
+        if (lws_add_http_header_content_length(wsi, 0, &p, end)) {
+            return -1;
+        }
+        if (lws_finalize_http_header(wsi, &p, end)) {
+            return -1;
+        }
+        lws_write(wsi, start, p - start, LWS_WRITE_HTTP_HEADERS);
+        return -1; // Close connection
+    }
+    
+    // Generate relay information JSON
+    cJSON* info_json = generate_relay_info_json();
+    if (!info_json) {
+        log_error("Failed to generate relay info JSON");
+        unsigned char buf[LWS_PRE + 256];
+        unsigned char *p = &buf[LWS_PRE];
+        unsigned char *start = p;
+        unsigned char *end = &buf[sizeof(buf) - 1];
+
+        if (lws_add_http_header_status(wsi, HTTP_STATUS_INTERNAL_SERVER_ERROR, &p, end)) {
+            return -1;
+        }
+        if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE, (unsigned char*)"text/plain", 10, &p, end)) {
+            return -1;
+        }
+        if (lws_add_http_header_content_length(wsi, 0, &p, end)) {
+            return -1;
+        }
+        if (lws_finalize_http_header(wsi, &p, end)) {
+            return -1;
+        }
+        lws_write(wsi, start, p - start, LWS_WRITE_HTTP_HEADERS);
+        return -1;
+    }
+    
+    char* json_string = cJSON_Print(info_json);
+    cJSON_Delete(info_json);
+    
+    if (!json_string) {
+        log_error("Failed to serialize relay info JSON");
+        unsigned char buf[LWS_PRE + 256];
+        unsigned char *p = &buf[LWS_PRE];
+        unsigned char *start = p;
+        unsigned char *end = &buf[sizeof(buf) - 1];
+
+        if (lws_add_http_header_status(wsi, HTTP_STATUS_INTERNAL_SERVER_ERROR, &p, end)) {
+            return -1;
+        }
+        if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE, (unsigned char*)"text/plain", 10, &p, end)) {
+            return -1;
+        }
+        if (lws_add_http_header_content_length(wsi, 0, &p, end)) {
+            return -1;
+        }
+        if (lws_finalize_http_header(wsi, &p, end)) {
+            return -1;
+        }
+        lws_write(wsi, start, p - start, LWS_WRITE_HTTP_HEADERS);
+        return -1;
+    }
+    
+    size_t json_len = strlen(json_string);
+    
+    // Allocate session data to manage buffer lifetime across callbacks
+    struct nip11_session_data* session_data = malloc(sizeof(struct nip11_session_data));
+    if (!session_data) {
+        log_error("Failed to allocate NIP-11 session data");
+        free(json_string);
+        return -1;
+    }
+    
+    // Store JSON buffer in session data for asynchronous handling
+    session_data->json_buffer = json_string;
+    session_data->json_length = json_len;
+    session_data->headers_sent = 0;
+    session_data->body_sent = 0;
+    
+    // Store session data in WSI user data for callback access
+    lws_set_wsi_user(wsi, session_data);
+    
+    // Prepare HTTP response with CORS headers
+    unsigned char buf[LWS_PRE + 1024];
+    unsigned char *p = &buf[LWS_PRE];
+    unsigned char *start = p;
+    unsigned char *end = &buf[sizeof(buf) - 1];
+    
+    // Add status
+    if (lws_add_http_header_status(wsi, HTTP_STATUS_OK, &p, end)) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    
+    // Add content type
+    if (lws_add_http_header_by_token(wsi, WSI_TOKEN_HTTP_CONTENT_TYPE,
+                                     (unsigned char*)"application/nostr+json", 22, &p, end)) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    
+    // Add content length
+    if (lws_add_http_header_content_length(wsi, json_len, &p, end)) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    
+    // Add CORS headers as required by NIP-11
+    if (lws_add_http_header_by_name(wsi, (unsigned char*)"access-control-allow-origin:",
+                                    (unsigned char*)"*", 1, &p, end)) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    if (lws_add_http_header_by_name(wsi, (unsigned char*)"access-control-allow-headers:",
+                                    (unsigned char*)"content-type, accept", 20, &p, end)) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    if (lws_add_http_header_by_name(wsi, (unsigned char*)"access-control-allow-methods:",
+                                    (unsigned char*)"GET, OPTIONS", 12, &p, end)) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    
+    // Finalize headers
+    if (lws_finalize_http_header(wsi, &p, end)) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    
+    // Write headers
+    if (lws_write(wsi, start, p - start, LWS_WRITE_HTTP_HEADERS) < 0) {
+        free(session_data->json_buffer);
+        free(session_data);
+        return -1;
+    }
+    
+    session_data->headers_sent = 1;
+    
+    // Request callback for body transmission
+    lws_callback_on_writable(wsi);
+    
+    log_success("NIP-11 headers sent, body transmission scheduled");
+    return 0;
+}
+

src/nip013.c

@@ -0,0 +1,190 @@
+// NIP-13 Proof of Work validation module
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <pthread.h>
+#include "../nostr_core_lib/cjson/cJSON.h"
+#include "../nostr_core_lib/nostr_core/nostr_core.h"
+#include "../nostr_core_lib/nostr_core/nip013.h"
+#include "config.h"
+
+// Forward declarations for logging functions
+void log_info(const char* message);
+void log_success(const char* message);
+void log_error(const char* message);
+void log_warning(const char* message);
+
+// NIP-13 PoW configuration structure
+struct pow_config {
+    int enabled;                    // 0 = disabled, 1 = enabled
+    int min_pow_difficulty;         // Minimum required difficulty (0 = no requirement)
+    int validation_flags;           // Bitflags for validation options
+    int require_nonce_tag;          // 1 = require nonce tag presence
+    int reject_lower_targets;       // 1 = reject if committed < actual difficulty
+    int strict_format;              // 1 = enforce strict nonce tag format
+    int anti_spam_mode;             // 1 = full anti-spam validation
+};
+
+// Initialize PoW configuration using configuration system
+void init_pow_config() {
+    log_info("Initializing NIP-13 Proof of Work configuration");
+
+    // Get all config values first (without holding mutex to avoid deadlock)
+    int pow_enabled = get_config_bool("pow_enabled", 1);
+    int pow_min_difficulty = get_config_int("pow_min_difficulty", 0);
+    const char* pow_mode = get_config_value("pow_mode");
+
+    pthread_mutex_lock(&g_unified_cache.cache_lock);
+
+    // Load PoW settings from configuration system
+    g_unified_cache.pow_config.enabled = pow_enabled;
+    g_unified_cache.pow_config.min_pow_difficulty = pow_min_difficulty;
+
+    // Configure PoW mode
+    if (pow_mode) {
+        if (strcmp(pow_mode, "strict") == 0) {
+            g_unified_cache.pow_config.validation_flags = NOSTR_POW_VALIDATE_ANTI_SPAM | NOSTR_POW_STRICT_FORMAT;
+            g_unified_cache.pow_config.require_nonce_tag = 1;
+            g_unified_cache.pow_config.reject_lower_targets = 1;
+            g_unified_cache.pow_config.strict_format = 1;
+            g_unified_cache.pow_config.anti_spam_mode = 1;
+            log_info("PoW configured in strict anti-spam mode");
+        } else if (strcmp(pow_mode, "full") == 0) {
+            g_unified_cache.pow_config.validation_flags = NOSTR_POW_VALIDATE_FULL;
+            g_unified_cache.pow_config.require_nonce_tag = 1;
+            log_info("PoW configured in full validation mode");
+        } else if (strcmp(pow_mode, "basic") == 0) {
+            g_unified_cache.pow_config.validation_flags = NOSTR_POW_VALIDATE_BASIC;
+            log_info("PoW configured in basic validation mode");
+        } else if (strcmp(pow_mode, "disabled") == 0) {
+            g_unified_cache.pow_config.enabled = 0;
+            log_info("PoW validation disabled via configuration");
+        }
+    } else {
+        // Default to basic mode
+        g_unified_cache.pow_config.validation_flags = NOSTR_POW_VALIDATE_BASIC;
+        log_info("PoW configured in basic validation mode (default)");
+    }
+
+    // Log final configuration
+    char config_msg[512];
+    snprintf(config_msg, sizeof(config_msg),
+             "PoW Configuration: enabled=%s, min_difficulty=%d, validation_flags=0x%x, mode=%s",
+             g_unified_cache.pow_config.enabled ? "true" : "false",
+             g_unified_cache.pow_config.min_pow_difficulty,
+             g_unified_cache.pow_config.validation_flags,
+             g_unified_cache.pow_config.anti_spam_mode ? "anti-spam" :
+             (g_unified_cache.pow_config.validation_flags & NOSTR_POW_VALIDATE_FULL) ? "full" : "basic");
+    log_info(config_msg);
+
+    pthread_mutex_unlock(&g_unified_cache.cache_lock);
+}
+
+// Validate event Proof of Work according to NIP-13
+int validate_event_pow(cJSON* event, char* error_message, size_t error_size) {
+    pthread_mutex_lock(&g_unified_cache.cache_lock);
+    int enabled = g_unified_cache.pow_config.enabled;
+    int min_pow_difficulty = g_unified_cache.pow_config.min_pow_difficulty;
+    int validation_flags = g_unified_cache.pow_config.validation_flags;
+    pthread_mutex_unlock(&g_unified_cache.cache_lock);
+
+    if (!enabled) {
+        return 0; // PoW validation disabled
+    }
+
+    if (!event) {
+        snprintf(error_message, error_size, "pow: null event");
+        return NOSTR_ERROR_INVALID_INPUT;
+    }
+
+    // If min_pow_difficulty is 0, only validate events that have nonce tags
+    // This allows events without PoW when difficulty requirement is 0
+    if (min_pow_difficulty == 0) {
+        cJSON* tags = cJSON_GetObjectItem(event, "tags");
+        int has_nonce_tag = 0;
+
+        if (tags && cJSON_IsArray(tags)) {
+            cJSON* tag = NULL;
+            cJSON_ArrayForEach(tag, tags) {
+                if (cJSON_IsArray(tag) && cJSON_GetArraySize(tag) >= 2) {
+                    cJSON* tag_name = cJSON_GetArrayItem(tag, 0);
+                    if (cJSON_IsString(tag_name)) {
+                        const char* name = cJSON_GetStringValue(tag_name);
+                        if (name && strcmp(name, "nonce") == 0) {
+                            has_nonce_tag = 1;
+                            break;
+                        }
+                    }
+                }
+            }
+        }
+
+        // If no minimum difficulty required and no nonce tag, skip PoW validation
+        if (!has_nonce_tag) {
+            return 0; // Accept event without PoW when min_difficulty=0
+        }
+    }
+
+    // Perform PoW validation using nostr_core_lib
+    nostr_pow_result_t pow_result;
+    int validation_result = nostr_validate_pow(event, min_pow_difficulty,
+                                             validation_flags, &pow_result);
+
+    if (validation_result != NOSTR_SUCCESS) {
+        // Handle specific error cases with appropriate messages
+        switch (validation_result) {
+            case NOSTR_ERROR_NIP13_INSUFFICIENT:
+                snprintf(error_message, error_size,
+                        "pow: insufficient difficulty: %d < %d",
+                        pow_result.actual_difficulty, min_pow_difficulty);
+                log_warning("Event rejected: insufficient PoW difficulty");
+                break;
+            case NOSTR_ERROR_NIP13_NO_NONCE_TAG:
+                // This should not happen with min_difficulty=0 after our check above
+                if (min_pow_difficulty > 0) {
+                    snprintf(error_message, error_size, "pow: missing required nonce tag");
+                    log_warning("Event rejected: missing nonce tag");
+                } else {
+                    return 0; // Allow when min_difficulty=0
+                }
+                break;
+            case NOSTR_ERROR_NIP13_INVALID_NONCE_TAG:
+                snprintf(error_message, error_size, "pow: invalid nonce tag format");
+                log_warning("Event rejected: invalid nonce tag format");
+                break;
+            case NOSTR_ERROR_NIP13_TARGET_MISMATCH:
+                snprintf(error_message, error_size,
+                        "pow: committed target (%d) lower than minimum (%d)",
+                        pow_result.committed_target, min_pow_difficulty);
+                log_warning("Event rejected: committed target too low (anti-spam protection)");
+                break;
+            case NOSTR_ERROR_NIP13_CALCULATION:
+                snprintf(error_message, error_size, "pow: difficulty calculation failed");
+                log_error("PoW difficulty calculation error");
+                break;
+            case NOSTR_ERROR_EVENT_INVALID_ID:
+                snprintf(error_message, error_size, "pow: invalid event ID format");
+                log_warning("Event rejected: invalid event ID for PoW calculation");
+                break;
+            default:
+                snprintf(error_message, error_size, "pow: validation failed - %s",
+                        strlen(pow_result.error_detail) > 0 ? pow_result.error_detail : "unknown error");
+                log_warning("Event rejected: PoW validation failed");
+        }
+        return validation_result;
+    }
+
+    // Log successful PoW validation (only if minimum difficulty is required)
+    if (min_pow_difficulty > 0 || pow_result.has_nonce_tag) {
+        char debug_msg[256];
+        snprintf(debug_msg, sizeof(debug_msg),
+                "PoW validated: difficulty=%d, target=%d, nonce=%llu%s",
+                pow_result.actual_difficulty,
+                pow_result.committed_target,
+                (unsigned long long)pow_result.nonce_value,
+                pow_result.has_nonce_tag ? "" : " (no nonce tag)");
+        log_info(debug_msg);
+    }
+
+    return 0;  // Success
+}

src/nip040.c

@@ -0,0 +1,173 @@
+#define _GNU_SOURCE
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <time.h>
+
+// Include nostr_core_lib for cJSON
+#include "../nostr_core_lib/cjson/cJSON.h"
+
+// Configuration management system
+#include "config.h"
+
+// NIP-40 Expiration configuration structure
+struct expiration_config {
+    int enabled;                    // 0 = disabled, 1 = enabled
+    int strict_mode;                // 1 = reject expired events on submission
+    int filter_responses;           // 1 = filter expired events from responses
+    int delete_expired;             // 1 = delete expired events from DB (future feature)
+    long grace_period;              // Grace period in seconds for clock skew
+};
+
+// Global expiration configuration instance
+struct expiration_config g_expiration_config = {
+    .enabled = 1,                   // Enable expiration handling by default
+    .strict_mode = 1,               // Reject expired events on submission by default
+    .filter_responses = 1,          // Filter expired events from responses by default
+    .delete_expired = 0,            // Don't delete by default (keep for audit)
+    .grace_period = 1               // 1 second grace period for testing (was 300)
+};
+
+// Forward declarations for logging functions
+void log_info(const char* message);
+void log_warning(const char* message);
+
+// Initialize expiration configuration using configuration system
+void init_expiration_config() {
+    log_info("Initializing NIP-40 Expiration Timestamp configuration");
+
+    // Get all config values first (without holding mutex to avoid deadlock)
+    int expiration_enabled = get_config_bool("expiration_enabled", 1);
+    int expiration_strict = get_config_bool("expiration_strict", 1);
+    int expiration_filter = get_config_bool("expiration_filter", 1);
+    int expiration_delete = get_config_bool("expiration_delete", 0);
+    long expiration_grace_period = get_config_int("expiration_grace_period", 1);
+
+    // Load expiration settings from configuration system
+    g_expiration_config.enabled = expiration_enabled;
+    g_expiration_config.strict_mode = expiration_strict;
+    g_expiration_config.filter_responses = expiration_filter;
+    g_expiration_config.delete_expired = expiration_delete;
+    g_expiration_config.grace_period = expiration_grace_period;
+
+    // Validate grace period bounds
+    if (g_expiration_config.grace_period < 0 || g_expiration_config.grace_period > 86400) {
+        log_warning("Invalid grace period, using default of 300 seconds");
+        g_expiration_config.grace_period = 300;
+    }
+
+    // Log final configuration
+    char config_msg[512];
+    snprintf(config_msg, sizeof(config_msg),
+             "Expiration Configuration: enabled=%s, strict_mode=%s, filter_responses=%s, grace_period=%ld seconds",
+             g_expiration_config.enabled ? "true" : "false",
+             g_expiration_config.strict_mode ? "true" : "false",
+             g_expiration_config.filter_responses ? "true" : "false",
+             g_expiration_config.grace_period);
+    log_info(config_msg);
+}
+
+// Extract expiration timestamp from event tags
+long extract_expiration_timestamp(cJSON* tags) {
+    if (!tags || !cJSON_IsArray(tags)) {
+        return 0; // No expiration
+    }
+
+    cJSON* tag = NULL;
+    cJSON_ArrayForEach(tag, tags) {
+        if (cJSON_IsArray(tag) && cJSON_GetArraySize(tag) >= 2) {
+            cJSON* tag_name = cJSON_GetArrayItem(tag, 0);
+            cJSON* tag_value = cJSON_GetArrayItem(tag, 1);
+
+            if (cJSON_IsString(tag_name) && cJSON_IsString(tag_value)) {
+                const char* name = cJSON_GetStringValue(tag_name);
+                const char* value = cJSON_GetStringValue(tag_value);
+
+                if (name && value && strcmp(name, "expiration") == 0) {
+                    // Validate that the string contains only digits (and optional leading whitespace)
+                    const char* p = value;
+
+                    // Skip leading whitespace
+                    while (*p == ' ' || *p == '\t') p++;
+
+                    // Check if we have at least one digit
+                    if (*p == '\0') {
+                        continue; // Empty or whitespace-only string, ignore this tag
+                    }
+
+                    // Validate that all remaining characters are digits
+                    const char* digit_start = p;
+                    while (*p >= '0' && *p <= '9') p++;
+
+                    // If we didn't consume the entire string or found no digits, it's malformed
+                    if (*p != '\0' || p == digit_start) {
+                        char debug_msg[256];
+                        snprintf(debug_msg, sizeof(debug_msg),
+                                "Ignoring malformed expiration tag value: '%.32s'", value);
+                        log_warning(debug_msg);
+                        continue; // Ignore malformed expiration tag
+                    }
+
+                    long expiration_ts = atol(value);
+                    if (expiration_ts > 0) {
+                        return expiration_ts;
+                    }
+                }
+            }
+        }
+    }
+
+    return 0; // No valid expiration tag found
+}
+
+// Check if event is currently expired
+int is_event_expired(cJSON* event, time_t current_time) {
+    if (!event) {
+        return 0; // Invalid event, not expired
+    }
+
+    cJSON* tags = cJSON_GetObjectItem(event, "tags");
+    long expiration_ts = extract_expiration_timestamp(tags);
+
+    if (expiration_ts == 0) {
+        return 0; // No expiration timestamp, not expired
+    }
+
+    // Check if current time exceeds expiration + grace period
+    return (current_time > (expiration_ts + g_expiration_config.grace_period));
+}
+
+// Validate event expiration according to NIP-40
+int validate_event_expiration(cJSON* event, char* error_message, size_t error_size) {
+    if (!g_expiration_config.enabled) {
+        return 0; // Expiration validation disabled
+    }
+
+    if (!event) {
+        snprintf(error_message, error_size, "expiration: null event");
+        return -1;
+    }
+
+    // Check if event is expired
+    time_t current_time = time(NULL);
+    if (is_event_expired(event, current_time)) {
+        if (g_expiration_config.strict_mode) {
+            cJSON* tags = cJSON_GetObjectItem(event, "tags");
+            long expiration_ts = extract_expiration_timestamp(tags);
+
+            snprintf(error_message, error_size,
+                    "invalid: event expired (expiration=%ld, current=%ld, grace=%ld)",
+                    expiration_ts, (long)current_time, g_expiration_config.grace_period);
+            log_warning("Event rejected: expired timestamp");
+            return -1;
+        } else {
+            // In non-strict mode, log but allow expired events
+            char debug_msg[256];
+            snprintf(debug_msg, sizeof(debug_msg),
+                    "Accepting expired event (strict_mode disabled)");
+            log_info(debug_msg);
+        }
+    }
+
+    return 0; // Success
+}

src/nip042.c

@@ -0,0 +1,180 @@
+#define _GNU_SOURCE
+
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+//             NIP-42 AUTHENTICATION FUNCTIONS
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+#include <pthread.h>
+#include <cjson/cJSON.h>
+#include <libwebsockets.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+
+// Forward declarations for logging functions
+void log_error(const char* message);
+void log_info(const char* message);
+void log_warning(const char* message);
+void log_success(const char* message);
+
+// Forward declaration for notice message function
+void send_notice_message(struct lws* wsi, const char* message);
+
+// Forward declarations for NIP-42 functions from request_validator.c
+int nostr_nip42_generate_challenge(char *challenge_buffer, size_t buffer_size);
+int nostr_nip42_verify_auth_event(cJSON *event, const char *challenge_id,
+                                  const char *relay_url, int time_tolerance_seconds);
+
+// Forward declaration for per_session_data struct (defined in main.c)
+struct per_session_data {
+    int authenticated;
+    void* subscriptions;           // Head of this session's subscription list
+    pthread_mutex_t session_lock;  // Per-session thread safety
+    char client_ip[41];            // Client IP for logging
+    int subscription_count;        // Number of subscriptions for this session
+
+    // NIP-42 Authentication State
+    char authenticated_pubkey[65]; // Authenticated public key (64 hex + null)
+    char active_challenge[65];     // Current challenge for this session (64 hex + null)
+    time_t challenge_created;      // When challenge was created
+    time_t challenge_expires;      // Challenge expiration time
+    int nip42_auth_required_events;        // Whether NIP-42 auth is required for EVENT submission
+    int nip42_auth_required_subscriptions; // Whether NIP-42 auth is required for REQ operations
+    int auth_challenge_sent;       // Whether challenge has been sent (0/1)
+};
+
+
+// Send NIP-42 authentication challenge to client
+void send_nip42_auth_challenge(struct lws* wsi, struct per_session_data* pss) {
+    if (!wsi || !pss) return;
+    
+    // Generate challenge using existing request_validator function
+    char challenge[65];
+    if (nostr_nip42_generate_challenge(challenge, sizeof(challenge)) != 0) {
+        log_error("Failed to generate NIP-42 challenge");
+        send_notice_message(wsi, "Authentication temporarily unavailable");
+        return;
+    }
+    
+    // Store challenge in session
+    pthread_mutex_lock(&pss->session_lock);
+    strncpy(pss->active_challenge, challenge, sizeof(pss->active_challenge) - 1);
+    pss->active_challenge[sizeof(pss->active_challenge) - 1] = '\0';
+    pss->challenge_created = time(NULL);
+    pss->challenge_expires = pss->challenge_created + 600; // 10 minutes
+    pss->auth_challenge_sent = 1;
+    pthread_mutex_unlock(&pss->session_lock);
+    
+    // Send AUTH challenge message: ["AUTH", <challenge>]
+    cJSON* auth_msg = cJSON_CreateArray();
+    cJSON_AddItemToArray(auth_msg, cJSON_CreateString("AUTH"));
+    cJSON_AddItemToArray(auth_msg, cJSON_CreateString(challenge));
+    
+    char* msg_str = cJSON_Print(auth_msg);
+    if (msg_str) {
+        size_t msg_len = strlen(msg_str);
+        unsigned char* buf = malloc(LWS_PRE + msg_len);
+        if (buf) {
+            memcpy(buf + LWS_PRE, msg_str, msg_len);
+            lws_write(wsi, buf + LWS_PRE, msg_len, LWS_WRITE_TEXT);
+            free(buf);
+        }
+        free(msg_str);
+    }
+    cJSON_Delete(auth_msg);
+    
+    char debug_msg[128];
+    snprintf(debug_msg, sizeof(debug_msg), "NIP-42 auth challenge sent: %.16s...", challenge);
+    log_info(debug_msg);
+}
+
+// Handle NIP-42 signed authentication event from client
+void handle_nip42_auth_signed_event(struct lws* wsi, struct per_session_data* pss, cJSON* auth_event) {
+    if (!wsi || !pss || !auth_event) return;
+    
+    // Serialize event for validation
+    char* event_json = cJSON_Print(auth_event);
+    if (!event_json) {
+        send_notice_message(wsi, "Invalid authentication event format");
+        return;
+    }
+    
+    pthread_mutex_lock(&pss->session_lock);
+    char challenge_copy[65];
+    strncpy(challenge_copy, pss->active_challenge, sizeof(challenge_copy) - 1);
+    challenge_copy[sizeof(challenge_copy) - 1] = '\0';
+    time_t challenge_expires = pss->challenge_expires;
+    pthread_mutex_unlock(&pss->session_lock);
+    
+    // Check if challenge has expired
+    time_t current_time = time(NULL);
+    if (current_time > challenge_expires) {
+        free(event_json);
+        send_notice_message(wsi, "Authentication challenge expired, please retry");
+        log_warning("NIP-42 authentication failed: challenge expired");
+        return;
+    }
+    
+    // Verify authentication using existing request_validator function
+    // Note: nostr_nip42_verify_auth_event doesn't extract pubkey, we need to do that separately
+    int result = nostr_nip42_verify_auth_event(auth_event, challenge_copy,
+                                               "ws://localhost:8888", 600); // 10 minutes tolerance
+    
+    char authenticated_pubkey[65] = {0};
+    if (result == 0) {
+        // Extract pubkey from the auth event
+        cJSON* pubkey_json = cJSON_GetObjectItem(auth_event, "pubkey");
+        if (pubkey_json && cJSON_IsString(pubkey_json)) {
+            const char* pubkey_str = cJSON_GetStringValue(pubkey_json);
+            if (pubkey_str && strlen(pubkey_str) == 64) {
+                strncpy(authenticated_pubkey, pubkey_str, sizeof(authenticated_pubkey) - 1);
+                authenticated_pubkey[sizeof(authenticated_pubkey) - 1] = '\0';
+            } else {
+                result = -1; // Invalid pubkey format
+            }
+        } else {
+            result = -1; // Missing pubkey
+        }
+    }
+    
+    free(event_json);
+    
+    if (result == 0) {
+        // Authentication successful
+        pthread_mutex_lock(&pss->session_lock);
+        pss->authenticated = 1;
+        strncpy(pss->authenticated_pubkey, authenticated_pubkey, sizeof(pss->authenticated_pubkey) - 1);
+        pss->authenticated_pubkey[sizeof(pss->authenticated_pubkey) - 1] = '\0';
+        // Clear challenge
+        memset(pss->active_challenge, 0, sizeof(pss->active_challenge));
+        pss->challenge_expires = 0;
+        pss->auth_challenge_sent = 0;
+        pthread_mutex_unlock(&pss->session_lock);
+        
+        char success_msg[256];
+        snprintf(success_msg, sizeof(success_msg),
+                 "NIP-42 authentication successful for pubkey: %.16s...", authenticated_pubkey);
+        log_success(success_msg);
+        
+        send_notice_message(wsi, "NIP-42 authentication successful");
+    } else {
+        // Authentication failed
+        char error_msg[256];
+        snprintf(error_msg, sizeof(error_msg),
+                 "NIP-42 authentication failed (error code: %d)", result);
+        log_warning(error_msg);
+        
+        send_notice_message(wsi, "NIP-42 authentication failed - invalid signature or challenge");
+    }
+}
+
+// Handle challenge response (not typically used in NIP-42, but included for completeness)
+void handle_nip42_auth_challenge_response(struct lws* wsi, struct per_session_data* pss, const char* challenge) {
+    (void)wsi; (void)pss; (void)challenge; // Mark as intentionally unused
+    
+    // NIP-42 doesn't typically use challenge responses from client to server
+    // This is reserved for potential future use or protocol extensions
+    log_warning("Received unexpected challenge response from client (not part of standard NIP-42 flow)");
+    send_notice_message(wsi, "Challenge responses are not supported - please send signed authentication event");
+}

src/request_validator.c

@@ -169,8 +169,8 @@ static void validator_debug_log(const char *message) {
 
 static int reload_auth_config(void);
 // Removed unused forward declarations for functions that are no longer called
-static int check_database_auth_rules(const char *pubkey, const char *operation,
-                                     const char *resource_hash);
+int check_database_auth_rules(const char *pubkey, const char *operation,
+                              const char *resource_hash);
 void nostr_request_validator_clear_violation(void);
 
 // NIP-42 challenge management functions
@@ -595,8 +595,8 @@ static int reload_auth_config(void) {
  * Check database authentication rules for the request
  * Implements the 6-step rule evaluation engine from AUTH_API.md
  */
-static int check_database_auth_rules(const char *pubkey, const char *operation,
-                                     const char *resource_hash) {
+int check_database_auth_rules(const char *pubkey, const char *operation,
+                              const char *resource_hash) {
   sqlite3 *db = NULL;
   sqlite3_stmt *stmt = NULL;
   int rc;

src/subscriptions.c

@@ -0,0 +1,723 @@
+#define _GNU_SOURCE
+#include <cjson/cJSON.h>
+#include <sqlite3.h>
+#include <string.h>
+#include <stdlib.h>
+#include <time.h>
+#include <stdio.h>
+#include <printf.h>
+#include <pthread.h>
+#include <libwebsockets.h>
+#include "subscriptions.h"
+
+// Forward declarations for logging functions
+void log_info(const char* message);
+void log_error(const char* message);
+void log_warning(const char* message);
+
+// Forward declarations for configuration functions
+const char* get_config_value(const char* key);
+
+// Forward declarations for NIP-40 expiration functions
+int is_event_expired(cJSON* event, time_t current_time);
+
+// Global database variable
+extern sqlite3* g_db;
+
+// Global unified cache
+extern unified_config_cache_t g_unified_cache;
+
+// Global subscription manager
+extern subscription_manager_t g_subscription_manager;
+
+
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+//             PERSISTENT SUBSCRIPTIONS SYSTEM
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+
+// Create a subscription filter from cJSON filter object
+subscription_filter_t* create_subscription_filter(cJSON* filter_json) {
+    if (!filter_json || !cJSON_IsObject(filter_json)) {
+        return NULL;
+    }
+    
+    subscription_filter_t* filter = calloc(1, sizeof(subscription_filter_t));
+    if (!filter) {
+        return NULL;
+    }
+    
+    // Copy filter criteria
+    cJSON* kinds = cJSON_GetObjectItem(filter_json, "kinds");
+    if (kinds && cJSON_IsArray(kinds)) {
+        filter->kinds = cJSON_Duplicate(kinds, 1);
+    }
+    
+    cJSON* authors = cJSON_GetObjectItem(filter_json, "authors");
+    if (authors && cJSON_IsArray(authors)) {
+        filter->authors = cJSON_Duplicate(authors, 1);
+    }
+    
+    cJSON* ids = cJSON_GetObjectItem(filter_json, "ids");
+    if (ids && cJSON_IsArray(ids)) {
+        filter->ids = cJSON_Duplicate(ids, 1);
+    }
+    
+    cJSON* since = cJSON_GetObjectItem(filter_json, "since");
+    if (since && cJSON_IsNumber(since)) {
+        filter->since = (long)cJSON_GetNumberValue(since);
+    }
+    
+    cJSON* until = cJSON_GetObjectItem(filter_json, "until");
+    if (until && cJSON_IsNumber(until)) {
+        filter->until = (long)cJSON_GetNumberValue(until);
+    }
+    
+    cJSON* limit = cJSON_GetObjectItem(filter_json, "limit");
+    if (limit && cJSON_IsNumber(limit)) {
+        filter->limit = (int)cJSON_GetNumberValue(limit);
+    }
+    
+    // Handle tag filters (e.g., {"#e": ["id1"], "#p": ["pubkey1"]})
+    cJSON* item = NULL;
+    cJSON_ArrayForEach(item, filter_json) {
+        if (item->string && strlen(item->string) >= 2 && item->string[0] == '#') {
+            if (!filter->tag_filters) {
+                filter->tag_filters = cJSON_CreateObject();
+            }
+            if (filter->tag_filters) {
+                cJSON_AddItemToObject(filter->tag_filters, item->string, cJSON_Duplicate(item, 1));
+            }
+        }
+    }
+    
+    return filter;
+}
+
+// Free a subscription filter
+void free_subscription_filter(subscription_filter_t* filter) {
+    if (!filter) return;
+    
+    if (filter->kinds) cJSON_Delete(filter->kinds);
+    if (filter->authors) cJSON_Delete(filter->authors);
+    if (filter->ids) cJSON_Delete(filter->ids);
+    if (filter->tag_filters) cJSON_Delete(filter->tag_filters);
+    
+    if (filter->next) {
+        free_subscription_filter(filter->next);
+    }
+    
+    free(filter);
+}
+
+// Create a new subscription
+subscription_t* create_subscription(const char* sub_id, struct lws* wsi, cJSON* filters_array, const char* client_ip) {
+    if (!sub_id || !wsi || !filters_array) {
+        return NULL;
+    }
+    
+    subscription_t* sub = calloc(1, sizeof(subscription_t));
+    if (!sub) {
+        return NULL;
+    }
+    
+    // Copy subscription ID (truncate if too long)
+    strncpy(sub->id, sub_id, SUBSCRIPTION_ID_MAX_LENGTH - 1);
+    sub->id[SUBSCRIPTION_ID_MAX_LENGTH - 1] = '\0';
+    
+    // Set WebSocket connection
+    sub->wsi = wsi;
+    
+    // Set client IP
+    if (client_ip) {
+        strncpy(sub->client_ip, client_ip, CLIENT_IP_MAX_LENGTH - 1);
+        sub->client_ip[CLIENT_IP_MAX_LENGTH - 1] = '\0';
+    }
+    
+    // Set timestamps and state
+    sub->created_at = time(NULL);
+    sub->events_sent = 0;
+    sub->active = 1;
+    
+    // Convert filters array to linked list
+    subscription_filter_t* filter_tail = NULL;
+    int filter_count = 0;
+    
+    if (cJSON_IsArray(filters_array)) {
+        cJSON* filter_json = NULL;
+        cJSON_ArrayForEach(filter_json, filters_array) {
+            if (filter_count >= MAX_FILTERS_PER_SUBSCRIPTION) {
+                log_warning("Maximum filters per subscription exceeded, ignoring excess filters");
+                break;
+            }
+            
+            subscription_filter_t* filter = create_subscription_filter(filter_json);
+            if (filter) {
+                if (!sub->filters) {
+                    sub->filters = filter;
+                    filter_tail = filter;
+                } else {
+                    filter_tail->next = filter;
+                    filter_tail = filter;
+                }
+                filter_count++;
+            }
+        }
+    }
+    
+    if (filter_count == 0) {
+        log_error("No valid filters found for subscription");
+        free(sub);
+        return NULL;
+    }
+    
+    return sub;
+}
+
+// Free a subscription
+void free_subscription(subscription_t* sub) {
+    if (!sub) return;
+    
+    if (sub->filters) {
+        free_subscription_filter(sub->filters);
+    }
+    
+    free(sub);
+}
+
+// Add subscription to global manager (thread-safe)
+int add_subscription_to_manager(subscription_t* sub) {
+    if (!sub) return -1;
+    
+    pthread_mutex_lock(&g_subscription_manager.subscriptions_lock);
+    
+    // Check global limits
+    if (g_subscription_manager.total_subscriptions >= g_subscription_manager.max_total_subscriptions) {
+        pthread_mutex_unlock(&g_subscription_manager.subscriptions_lock);
+        log_error("Maximum total subscriptions reached");
+        return -1;
+    }
+    
+    // Add to global list
+    sub->next = g_subscription_manager.active_subscriptions;
+    g_subscription_manager.active_subscriptions = sub;
+    g_subscription_manager.total_subscriptions++;
+    g_subscription_manager.total_created++;
+    
+    pthread_mutex_unlock(&g_subscription_manager.subscriptions_lock);
+    
+    // Log subscription creation to database
+    log_subscription_created(sub);
+    
+    char debug_msg[256];
+    snprintf(debug_msg, sizeof(debug_msg), "Added subscription '%s' (total: %d)",
+             sub->id, g_subscription_manager.total_subscriptions);
+    log_info(debug_msg);
+    
+    return 0;
+}
+
+// Remove subscription from global manager (thread-safe)
+int remove_subscription_from_manager(const char* sub_id, struct lws* wsi) {
+    if (!sub_id) return -1;
+    
+    pthread_mutex_lock(&g_subscription_manager.subscriptions_lock);
+    
+    subscription_t** current = &g_subscription_manager.active_subscriptions;
+    
+    while (*current) {
+        subscription_t* sub = *current;
+        
+        // Match by ID and WebSocket connection
+        if (strcmp(sub->id, sub_id) == 0 && (!wsi || sub->wsi == wsi)) {
+            // Remove from list
+            *current = sub->next;
+            g_subscription_manager.total_subscriptions--;
+            
+            pthread_mutex_unlock(&g_subscription_manager.subscriptions_lock);
+            
+            // Log subscription closure to database
+            log_subscription_closed(sub_id, sub->client_ip, "closed");
+            
+            // Update events sent counter before freeing
+            update_subscription_events_sent(sub_id, sub->events_sent);
+            
+            char debug_msg[256];
+            snprintf(debug_msg, sizeof(debug_msg), "Removed subscription '%s' (total: %d)",
+                     sub_id, g_subscription_manager.total_subscriptions);
+            log_info(debug_msg);
+            
+            free_subscription(sub);
+            return 0;
+        }
+        
+        current = &(sub->next);
+    }
+    
+    pthread_mutex_unlock(&g_subscription_manager.subscriptions_lock);
+    
+    char debug_msg[256];
+    snprintf(debug_msg, sizeof(debug_msg), "Subscription '%s' not found for removal", sub_id);
+    log_warning(debug_msg);
+    
+    return -1;
+}
+
+// Check if an event matches a subscription filter
+int event_matches_filter(cJSON* event, subscription_filter_t* filter) {
+    if (!event || !filter) {
+        return 0;
+    }
+    
+    // Check kinds filter
+    if (filter->kinds && cJSON_IsArray(filter->kinds)) {
+        cJSON* event_kind = cJSON_GetObjectItem(event, "kind");
+        if (!event_kind || !cJSON_IsNumber(event_kind)) {
+            return 0;
+        }
+        
+        int event_kind_val = (int)cJSON_GetNumberValue(event_kind);
+        int kind_match = 0;
+        
+        cJSON* kind_item = NULL;
+        cJSON_ArrayForEach(kind_item, filter->kinds) {
+            if (cJSON_IsNumber(kind_item) && (int)cJSON_GetNumberValue(kind_item) == event_kind_val) {
+                kind_match = 1;
+                break;
+            }
+        }
+        
+        if (!kind_match) {
+            return 0;
+        }
+    }
+    
+    // Check authors filter
+    if (filter->authors && cJSON_IsArray(filter->authors)) {
+        cJSON* event_pubkey = cJSON_GetObjectItem(event, "pubkey");
+        if (!event_pubkey || !cJSON_IsString(event_pubkey)) {
+            return 0;
+        }
+        
+        const char* event_pubkey_str = cJSON_GetStringValue(event_pubkey);
+        int author_match = 0;
+        
+        cJSON* author_item = NULL;
+        cJSON_ArrayForEach(author_item, filter->authors) {
+            if (cJSON_IsString(author_item)) {
+                const char* author_str = cJSON_GetStringValue(author_item);
+                // Support prefix matching (partial pubkeys)
+                if (strncmp(event_pubkey_str, author_str, strlen(author_str)) == 0) {
+                    author_match = 1;
+                    break;
+                }
+            }
+        }
+        
+        if (!author_match) {
+            return 0;
+        }
+    }
+    
+    // Check IDs filter
+    if (filter->ids && cJSON_IsArray(filter->ids)) {
+        cJSON* event_id = cJSON_GetObjectItem(event, "id");
+        if (!event_id || !cJSON_IsString(event_id)) {
+            return 0;
+        }
+        
+        const char* event_id_str = cJSON_GetStringValue(event_id);
+        int id_match = 0;
+        
+        cJSON* id_item = NULL;
+        cJSON_ArrayForEach(id_item, filter->ids) {
+            if (cJSON_IsString(id_item)) {
+                const char* id_str = cJSON_GetStringValue(id_item);
+                // Support prefix matching (partial IDs)
+                if (strncmp(event_id_str, id_str, strlen(id_str)) == 0) {
+                    id_match = 1;
+                    break;
+                }
+            }
+        }
+        
+        if (!id_match) {
+            return 0;
+        }
+    }
+    
+    // Check since filter
+    if (filter->since > 0) {
+        cJSON* event_created_at = cJSON_GetObjectItem(event, "created_at");
+        if (!event_created_at || !cJSON_IsNumber(event_created_at)) {
+            return 0;
+        }
+        
+        long event_timestamp = (long)cJSON_GetNumberValue(event_created_at);
+        if (event_timestamp < filter->since) {
+            return 0;
+        }
+    }
+    
+    // Check until filter
+    if (filter->until > 0) {
+        cJSON* event_created_at = cJSON_GetObjectItem(event, "created_at");
+        if (!event_created_at || !cJSON_IsNumber(event_created_at)) {
+            return 0;
+        }
+        
+        long event_timestamp = (long)cJSON_GetNumberValue(event_created_at);
+        if (event_timestamp > filter->until) {
+            return 0;
+        }
+    }
+    
+    // Check tag filters (e.g., #e, #p tags)
+    if (filter->tag_filters && cJSON_IsObject(filter->tag_filters)) {
+        cJSON* event_tags = cJSON_GetObjectItem(event, "tags");
+        if (!event_tags || !cJSON_IsArray(event_tags)) {
+            return 0; // Event has no tags but filter requires tags
+        }
+        
+        // Check each tag filter
+        cJSON* tag_filter = NULL;
+        cJSON_ArrayForEach(tag_filter, filter->tag_filters) {
+            if (!tag_filter->string || strlen(tag_filter->string) < 2 || tag_filter->string[0] != '#') {
+                continue; // Invalid tag filter
+            }
+            
+            const char* tag_name = tag_filter->string + 1; // Skip the '#'
+            
+            if (!cJSON_IsArray(tag_filter)) {
+                continue; // Tag filter must be an array
+            }
+            
+            int tag_match = 0;
+            
+            // Search through event tags for matching tag name and value
+            cJSON* event_tag = NULL;
+            cJSON_ArrayForEach(event_tag, event_tags) {
+                if (!cJSON_IsArray(event_tag) || cJSON_GetArraySize(event_tag) < 2) {
+                    continue; // Invalid tag format
+                }
+                
+                cJSON* event_tag_name = cJSON_GetArrayItem(event_tag, 0);
+                cJSON* event_tag_value = cJSON_GetArrayItem(event_tag, 1);
+                
+                if (!cJSON_IsString(event_tag_name) || !cJSON_IsString(event_tag_value)) {
+                    continue;
+                }
+                
+                // Check if tag name matches
+                if (strcmp(cJSON_GetStringValue(event_tag_name), tag_name) == 0) {
+                    const char* event_tag_value_str = cJSON_GetStringValue(event_tag_value);
+                    
+                    // Check if any of the filter values match this tag value
+                    cJSON* filter_value = NULL;
+                    cJSON_ArrayForEach(filter_value, tag_filter) {
+                        if (cJSON_IsString(filter_value)) {
+                            const char* filter_value_str = cJSON_GetStringValue(filter_value);
+                            // Support prefix matching for tag values
+                            if (strncmp(event_tag_value_str, filter_value_str, strlen(filter_value_str)) == 0) {
+                                tag_match = 1;
+                                break;
+                            }
+                        }
+                    }
+                    
+                    if (tag_match) {
+                        break;
+                    }
+                }
+            }
+            
+            if (!tag_match) {
+                return 0; // This tag filter didn't match, so the event doesn't match
+            }
+        }
+    }
+    
+    return 1; // All filters passed
+}
+
+// Check if an event matches any filter in a subscription (filters are OR'd together)
+int event_matches_subscription(cJSON* event, subscription_t* subscription) {
+    if (!event || !subscription || !subscription->filters) {
+        return 0;
+    }
+    
+    subscription_filter_t* filter = subscription->filters;
+    while (filter) {
+        if (event_matches_filter(event, filter)) {
+            return 1; // Match found (OR logic)
+        }
+        filter = filter->next;
+    }
+    
+    return 0; // No filters matched
+}
+
+// Broadcast event to all matching subscriptions (thread-safe)
+int broadcast_event_to_subscriptions(cJSON* event) {
+    if (!event) {
+        return 0;
+    }
+    
+    // Check if event is expired and should not be broadcast (NIP-40)
+    pthread_mutex_lock(&g_unified_cache.cache_lock);
+    int expiration_enabled = g_unified_cache.expiration_config.enabled;
+    int filter_responses = g_unified_cache.expiration_config.filter_responses;
+    pthread_mutex_unlock(&g_unified_cache.cache_lock);
+    
+    if (expiration_enabled && filter_responses) {
+        time_t current_time = time(NULL);
+        if (is_event_expired(event, current_time)) {
+            char debug_msg[256];
+            cJSON* event_id_obj = cJSON_GetObjectItem(event, "id");
+            const char* event_id = event_id_obj ? cJSON_GetStringValue(event_id_obj) : "unknown";
+            snprintf(debug_msg, sizeof(debug_msg), "Skipping broadcast of expired event: %.16s", event_id);
+            log_info(debug_msg);
+            return 0; // Don't broadcast expired events
+        }
+    }
+    
+    int broadcasts = 0;
+    
+    pthread_mutex_lock(&g_subscription_manager.subscriptions_lock);
+    
+    subscription_t* sub = g_subscription_manager.active_subscriptions;
+    while (sub) {
+        if (sub->active && event_matches_subscription(event, sub)) {
+            // Create EVENT message for this subscription
+            cJSON* event_msg = cJSON_CreateArray();
+            cJSON_AddItemToArray(event_msg, cJSON_CreateString("EVENT"));
+            cJSON_AddItemToArray(event_msg, cJSON_CreateString(sub->id));
+            cJSON_AddItemToArray(event_msg, cJSON_Duplicate(event, 1));
+            
+            char* msg_str = cJSON_Print(event_msg);
+            if (msg_str) {
+                size_t msg_len = strlen(msg_str);
+                unsigned char* buf = malloc(LWS_PRE + msg_len);
+                if (buf) {
+                    memcpy(buf + LWS_PRE, msg_str, msg_len);
+                    
+                    // Send to WebSocket connection
+                    int write_result = lws_write(sub->wsi, buf + LWS_PRE, msg_len, LWS_WRITE_TEXT);
+                    if (write_result >= 0) {
+                        sub->events_sent++;
+                        broadcasts++;
+                        
+                        // Log event broadcast to database (optional - can be disabled for performance)
+                        cJSON* event_id_obj = cJSON_GetObjectItem(event, "id");
+                        if (event_id_obj && cJSON_IsString(event_id_obj)) {
+                            log_event_broadcast(cJSON_GetStringValue(event_id_obj), sub->id, sub->client_ip);
+                        }
+                    }
+                    
+                    free(buf);
+                }
+                free(msg_str);
+            }
+            
+            cJSON_Delete(event_msg);
+        }
+        
+        sub = sub->next;
+    }
+    
+    // Update global statistics
+    g_subscription_manager.total_events_broadcast += broadcasts;
+    
+    pthread_mutex_unlock(&g_subscription_manager.subscriptions_lock);
+    
+    if (broadcasts > 0) {
+        char debug_msg[256];
+        snprintf(debug_msg, sizeof(debug_msg), "Broadcasted event to %d subscriptions", broadcasts);
+        log_info(debug_msg);
+    }
+    
+    return broadcasts;
+}
+
+
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+//             SUBSCRIPTION DATABASE LOGGING
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+
+// Log subscription creation to database
+void log_subscription_created(const subscription_t* sub) {
+    if (!g_db || !sub) return;
+    
+    // Create filter JSON for logging
+    char* filter_json = NULL;
+    if (sub->filters) {
+        cJSON* filters_array = cJSON_CreateArray();
+        subscription_filter_t* filter = sub->filters;
+        
+        while (filter) {
+            cJSON* filter_obj = cJSON_CreateObject();
+            
+            if (filter->kinds) {
+                cJSON_AddItemToObject(filter_obj, "kinds", cJSON_Duplicate(filter->kinds, 1));
+            }
+            if (filter->authors) {
+                cJSON_AddItemToObject(filter_obj, "authors", cJSON_Duplicate(filter->authors, 1));
+            }
+            if (filter->ids) {
+                cJSON_AddItemToObject(filter_obj, "ids", cJSON_Duplicate(filter->ids, 1));
+            }
+            if (filter->since > 0) {
+                cJSON_AddNumberToObject(filter_obj, "since", filter->since);
+            }
+            if (filter->until > 0) {
+                cJSON_AddNumberToObject(filter_obj, "until", filter->until);
+            }
+            if (filter->limit > 0) {
+                cJSON_AddNumberToObject(filter_obj, "limit", filter->limit);
+            }
+            if (filter->tag_filters) {
+                cJSON* tags_obj = cJSON_Duplicate(filter->tag_filters, 1);
+                cJSON* item = NULL;
+                cJSON_ArrayForEach(item, tags_obj) {
+                    if (item->string) {
+                        cJSON_AddItemToObject(filter_obj, item->string, cJSON_Duplicate(item, 1));
+                    }
+                }
+                cJSON_Delete(tags_obj);
+            }
+            
+            cJSON_AddItemToArray(filters_array, filter_obj);
+            filter = filter->next;
+        }
+        
+        filter_json = cJSON_Print(filters_array);
+        cJSON_Delete(filters_array);
+    }
+    
+    const char* sql =
+        "INSERT INTO subscription_events (subscription_id, client_ip, event_type, filter_json) "
+        "VALUES (?, ?, 'created', ?)";
+    
+    sqlite3_stmt* stmt;
+    int rc = sqlite3_prepare_v2(g_db, sql, -1, &stmt, NULL);
+    if (rc == SQLITE_OK) {
+        sqlite3_bind_text(stmt, 1, sub->id, -1, SQLITE_STATIC);
+        sqlite3_bind_text(stmt, 2, sub->client_ip, -1, SQLITE_STATIC);
+        sqlite3_bind_text(stmt, 3, filter_json ? filter_json : "[]", -1, SQLITE_TRANSIENT);
+        
+        sqlite3_step(stmt);
+        sqlite3_finalize(stmt);
+    }
+    
+    if (filter_json) free(filter_json);
+}
+
+// Log subscription closure to database
+void log_subscription_closed(const char* sub_id, const char* client_ip, const char* reason) {
+    (void)reason; // Mark as intentionally unused
+    if (!g_db || !sub_id) return;
+    
+    const char* sql =
+        "INSERT INTO subscription_events (subscription_id, client_ip, event_type) "
+        "VALUES (?, ?, 'closed')";
+    
+    sqlite3_stmt* stmt;
+    int rc = sqlite3_prepare_v2(g_db, sql, -1, &stmt, NULL);
+    if (rc == SQLITE_OK) {
+        sqlite3_bind_text(stmt, 1, sub_id, -1, SQLITE_STATIC);
+        sqlite3_bind_text(stmt, 2, client_ip ? client_ip : "unknown", -1, SQLITE_STATIC);
+        
+        sqlite3_step(stmt);
+        sqlite3_finalize(stmt);
+    }
+    
+    // Update the corresponding 'created' entry with end time and events sent
+    const char* update_sql =
+        "UPDATE subscription_events "
+        "SET ended_at = strftime('%s', 'now') "
+        "WHERE subscription_id = ? AND event_type = 'created' AND ended_at IS NULL";
+    
+    rc = sqlite3_prepare_v2(g_db, update_sql, -1, &stmt, NULL);
+    if (rc == SQLITE_OK) {
+        sqlite3_bind_text(stmt, 1, sub_id, -1, SQLITE_STATIC);
+        sqlite3_step(stmt);
+        sqlite3_finalize(stmt);
+    }
+}
+
+// Log subscription disconnection to database
+void log_subscription_disconnected(const char* client_ip) {
+    if (!g_db || !client_ip) return;
+    
+    // Mark all active subscriptions for this client as disconnected
+    const char* sql =
+        "UPDATE subscription_events "
+        "SET ended_at = strftime('%s', 'now') "
+        "WHERE client_ip = ? AND event_type = 'created' AND ended_at IS NULL";
+    
+    sqlite3_stmt* stmt;
+    int rc = sqlite3_prepare_v2(g_db, sql, -1, &stmt, NULL);
+    if (rc == SQLITE_OK) {
+        sqlite3_bind_text(stmt, 1, client_ip, -1, SQLITE_STATIC);
+        int changes = sqlite3_changes(g_db);
+        sqlite3_step(stmt);
+        sqlite3_finalize(stmt);
+        
+        if (changes > 0) {
+            // Log a disconnection event
+            const char* insert_sql =
+                "INSERT INTO subscription_events (subscription_id, client_ip, event_type) "
+                "VALUES ('disconnect', ?, 'disconnected')";
+            
+            rc = sqlite3_prepare_v2(g_db, insert_sql, -1, &stmt, NULL);
+            if (rc == SQLITE_OK) {
+                sqlite3_bind_text(stmt, 1, client_ip, -1, SQLITE_STATIC);
+                sqlite3_step(stmt);
+                sqlite3_finalize(stmt);
+            }
+        }
+    }
+}
+
+// Log event broadcast to database (optional, can be resource intensive)
+void log_event_broadcast(const char* event_id, const char* sub_id, const char* client_ip) {
+    if (!g_db || !event_id || !sub_id || !client_ip) return;
+    
+    const char* sql =
+        "INSERT INTO event_broadcasts (event_id, subscription_id, client_ip) "
+        "VALUES (?, ?, ?)";
+    
+    sqlite3_stmt* stmt;
+    int rc = sqlite3_prepare_v2(g_db, sql, -1, &stmt, NULL);
+    if (rc == SQLITE_OK) {
+        sqlite3_bind_text(stmt, 1, event_id, -1, SQLITE_STATIC);
+        sqlite3_bind_text(stmt, 2, sub_id, -1, SQLITE_STATIC);
+        sqlite3_bind_text(stmt, 3, client_ip, -1, SQLITE_STATIC);
+        
+        sqlite3_step(stmt);
+        sqlite3_finalize(stmt);
+    }
+}
+
+// Update events sent counter for a subscription
+void update_subscription_events_sent(const char* sub_id, int events_sent) {
+    if (!g_db || !sub_id) return;
+    
+    const char* sql =
+        "UPDATE subscription_events "
+        "SET events_sent = ? "
+        "WHERE subscription_id = ? AND event_type = 'created'";
+    
+    sqlite3_stmt* stmt;
+    int rc = sqlite3_prepare_v2(g_db, sql, -1, &stmt, NULL);
+    if (rc == SQLITE_OK) {
+        sqlite3_bind_int(stmt, 1, events_sent);
+        sqlite3_bind_text(stmt, 2, sub_id, -1, SQLITE_STATIC);
+        
+        sqlite3_step(stmt);
+        sqlite3_finalize(stmt);
+    }
+}

src/subscriptions.h

@@ -0,0 +1,91 @@
+// Subscription system structures and functions for C-Relay
+// This header defines subscription management functionality
+
+#ifndef SUBSCRIPTIONS_H
+#define SUBSCRIPTIONS_H
+
+#include <pthread.h>
+#include <time.h>
+#include <stdint.h>
+#include "../nostr_core_lib/cjson/cJSON.h"
+#include "config.h"  // For CLIENT_IP_MAX_LENGTH
+
+// Forward declaration for libwebsockets struct
+struct lws;
+
+// Constants
+#define SUBSCRIPTION_ID_MAX_LENGTH 64
+#define MAX_FILTERS_PER_SUBSCRIPTION 10
+#define MAX_TOTAL_SUBSCRIPTIONS 5000
+
+// Forward declarations for typedefs
+typedef struct subscription_filter subscription_filter_t;
+typedef struct subscription subscription_t;
+typedef struct subscription_manager subscription_manager_t;
+
+// Subscription filter structure
+struct subscription_filter {
+    // Filter criteria (all optional)
+    cJSON* kinds;           // Array of event kinds [1,2,3]
+    cJSON* authors;         // Array of author pubkeys
+    cJSON* ids;            // Array of event IDs
+    long since;            // Unix timestamp (0 = not set)
+    long until;            // Unix timestamp (0 = not set)
+    int limit;             // Result limit (0 = no limit)
+    cJSON* tag_filters;    // Object with tag filters: {"#e": ["id1"], "#p": ["pubkey1"]}
+
+    // Linked list for multiple filters per subscription
+    struct subscription_filter* next;
+};
+
+// Active subscription structure
+struct subscription {
+    char id[SUBSCRIPTION_ID_MAX_LENGTH];     // Subscription ID
+    struct lws* wsi;                         // WebSocket connection handle
+    subscription_filter_t* filters;          // Linked list of filters (OR'd together)
+    time_t created_at;                       // When subscription was created
+    int events_sent;                         // Counter for sent events
+    int active;                              // 1 = active, 0 = closed
+
+    // Client info for logging
+    char client_ip[CLIENT_IP_MAX_LENGTH];    // Client IP address
+
+    // Linked list pointers
+    struct subscription* next;               // Next subscription globally
+    struct subscription* session_next;      // Next subscription for this session
+};
+
+// Global subscription manager
+struct subscription_manager {
+    subscription_t* active_subscriptions;   // Head of global subscription list
+    pthread_mutex_t subscriptions_lock;     // Global thread safety
+    int total_subscriptions;                // Current count
+
+    // Configuration
+    int max_subscriptions_per_client;       // Default: 20
+    int max_total_subscriptions;            // Default: 5000
+
+    // Statistics
+    uint64_t total_created;                 // Lifetime subscription count
+    uint64_t total_events_broadcast;        // Lifetime event broadcast count
+};
+
+// Function declarations
+subscription_filter_t* create_subscription_filter(cJSON* filter_json);
+void free_subscription_filter(subscription_filter_t* filter);
+subscription_t* create_subscription(const char* sub_id, struct lws* wsi, cJSON* filters_array, const char* client_ip);
+void free_subscription(subscription_t* sub);
+int add_subscription_to_manager(subscription_t* sub);
+int remove_subscription_from_manager(const char* sub_id, struct lws* wsi);
+int event_matches_filter(cJSON* event, subscription_filter_t* filter);
+int event_matches_subscription(cJSON* event, subscription_t* subscription);
+int broadcast_event_to_subscriptions(cJSON* event);
+
+// Database logging functions
+void log_subscription_created(const subscription_t* sub);
+void log_subscription_closed(const char* sub_id, const char* client_ip, const char* reason);
+void log_subscription_disconnected(const char* client_ip);
+void log_event_broadcast(const char* event_id, const char* sub_id, const char* client_ip);
+void update_subscription_events_sent(const char* sub_id, int events_sent);
+
+#endif // SUBSCRIPTIONS_H

src/websockets.c

@@ -0,0 +1,901 @@
+// Define _GNU_SOURCE to ensure all POSIX features are available
+#define _GNU_SOURCE
+
+// Includes
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <signal.h>
+#include <time.h>
+#include <pthread.h>
+#include <sqlite3.h>
+
+// Include libwebsockets after pthread.h to ensure pthread_rwlock_t is defined
+#include <libwebsockets.h>
+#include <errno.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+// Include nostr_core_lib for Nostr functionality
+#include "../nostr_core_lib/cjson/cJSON.h"
+#include "../nostr_core_lib/nostr_core/nostr_core.h"
+#include "../nostr_core_lib/nostr_core/nip013.h"  // NIP-13: Proof of Work
+#include "config.h"  // Configuration management system
+#include "sql_schema.h"  // Embedded database schema
+#include "websockets.h"  // WebSocket structures and constants
+#include "subscriptions.h"  // Subscription structures and functions
+
+// Forward declarations for logging functions
+void log_info(const char* message);
+void log_success(const char* message);
+void log_error(const char* message);
+void log_warning(const char* message);
+
+// Forward declarations for configuration functions
+const char* get_config_value(const char* key);
+int get_config_int(const char* key, int default_value);
+int get_config_bool(const char* key, int default_value);
+// Forward declarations for NIP-42 authentication functions
+int is_nip42_auth_globally_required(void);
+int is_nip42_auth_required_for_kind(int kind);
+void send_nip42_auth_challenge(struct lws* wsi, struct per_session_data* pss);
+void handle_nip42_auth_signed_event(struct lws* wsi, struct per_session_data* pss, cJSON* auth_event);
+void handle_nip42_auth_challenge_response(struct lws* wsi, struct per_session_data* pss, const char* challenge);
+
+// Forward declarations for NIP-11 relay information handling
+int handle_nip11_http_request(struct lws* wsi, const char* accept_header);
+
+// Forward declarations for database functions
+int store_event(cJSON* event);
+
+// Forward declarations for subscription management
+int broadcast_event_to_subscriptions(cJSON* event);
+int add_subscription_to_manager(struct subscription* sub);
+int remove_subscription_from_manager(const char* sub_id, struct lws* wsi);
+
+// Forward declarations for event handling
+int handle_event_message(cJSON* event, char* error_message, size_t error_size);
+int nostr_validate_unified_request(const char* json_string, size_t json_length);
+
+// Forward declarations for admin event processing
+int process_admin_event_in_config(cJSON* event, char* error_message, size_t error_size, struct lws* wsi);
+int is_authorized_admin_event(cJSON* event, char* error_message, size_t error_size);
+
+// Forward declarations for NIP-09 deletion request handling
+int handle_deletion_request(cJSON* event, char* error_message, size_t error_size);
+
+// Forward declarations for NIP-13 PoW handling
+int validate_event_pow(cJSON* event, char* error_message, size_t error_size);
+
+// Forward declarations for NIP-40 expiration handling
+int is_event_expired(cJSON* event, time_t current_time);
+
+// Forward declarations for subscription handling
+int handle_req_message(const char* sub_id, cJSON* filters, struct lws *wsi, struct per_session_data *pss);
+
+// Forward declarations for NOTICE message support
+void send_notice_message(struct lws* wsi, const char* message);
+
+// Forward declarations for unified cache access
+extern unified_config_cache_t g_unified_cache;
+
+// Forward declarations for global state
+extern sqlite3* g_db;
+extern int g_server_running;
+extern struct lws_context *ws_context;
+
+// Global subscription manager
+struct subscription_manager g_subscription_manager;
+
+
+
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+//             WEBSOCKET PROTOCOL
+/////////////////////////////////////////////////////////////////////////////////////////
+/////////////////////////////////////////////////////////////////////////////////////////
+
+// WebSocket callback function for Nostr relay protocol
+static int nostr_relay_callback(struct lws *wsi, enum lws_callback_reasons reason,
+                               void *user, void *in, size_t len) {
+    struct per_session_data *pss = (struct per_session_data *)user;
+    
+    switch (reason) {
+        case LWS_CALLBACK_HTTP:
+            // Handle NIP-11 relay information requests (HTTP GET to root path)
+            {
+                char *requested_uri = (char *)in;
+                log_info("HTTP request received");
+                
+                // Check if this is a GET request to the root path
+                if (strcmp(requested_uri, "/") == 0) {
+                    // Get Accept header
+                    char accept_header[256] = {0};
+                    int header_len = lws_hdr_copy(wsi, accept_header, sizeof(accept_header) - 1, WSI_TOKEN_HTTP_ACCEPT);
+                    
+                    if (header_len > 0) {
+                        accept_header[header_len] = '\0';
+                        
+                        // Handle NIP-11 request
+                        if (handle_nip11_http_request(wsi, accept_header) == 0) {
+                            return 0; // Successfully handled
+                        }
+                    } else {
+                        log_warning("HTTP request without Accept header");
+                    }
+                    
+                    // Return 404 for other requests
+                    lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL);
+                    return -1;
+                }
+                
+                // Return 404 for non-root paths
+                lws_return_http_status(wsi, HTTP_STATUS_NOT_FOUND, NULL);
+                return -1;
+            }
+            
+        case LWS_CALLBACK_HTTP_WRITEABLE:
+            // Handle NIP-11 HTTP body transmission with proper buffer management
+            {
+                struct nip11_session_data* session_data = (struct nip11_session_data*)lws_wsi_user(wsi);
+                if (session_data && session_data->headers_sent && !session_data->body_sent) {
+                    // Allocate buffer for JSON body transmission
+                    unsigned char *json_buf = malloc(LWS_PRE + session_data->json_length);
+                    if (!json_buf) {
+                        log_error("Failed to allocate buffer for NIP-11 body transmission");
+                        // Clean up session data
+                        free(session_data->json_buffer);
+                        free(session_data);
+                        lws_set_wsi_user(wsi, NULL);
+                        return -1;
+                    }
+                    
+                    // Copy JSON data to buffer
+                    memcpy(json_buf + LWS_PRE, session_data->json_buffer, session_data->json_length);
+                    
+                    // Write JSON body
+                    int write_result = lws_write(wsi, json_buf + LWS_PRE, session_data->json_length, LWS_WRITE_HTTP);
+                    
+                    // Free the transmission buffer immediately (it's been copied by libwebsockets)
+                    free(json_buf);
+                    
+                    if (write_result < 0) {
+                        log_error("Failed to write NIP-11 JSON body");
+                        // Clean up session data
+                        free(session_data->json_buffer);
+                        free(session_data);
+                        lws_set_wsi_user(wsi, NULL);
+                        return -1;
+                    }
+                    
+                    // Mark body as sent and clean up session data
+                    session_data->body_sent = 1;
+                    free(session_data->json_buffer);
+                    free(session_data);
+                    lws_set_wsi_user(wsi, NULL);
+                    
+                    log_success("NIP-11 relay information served successfully");
+                    return 0; // Close connection after successful transmission
+                }
+            }
+            break;
+            
+        case LWS_CALLBACK_ESTABLISHED:
+            log_info("WebSocket connection established");
+            memset(pss, 0, sizeof(*pss));
+            pthread_mutex_init(&pss->session_lock, NULL);
+            
+            // Get real client IP address
+            char client_ip[CLIENT_IP_MAX_LENGTH];
+            lws_get_peer_simple(wsi, client_ip, sizeof(client_ip));
+            
+            // Ensure client_ip is null-terminated and copy safely
+            client_ip[CLIENT_IP_MAX_LENGTH - 1] = '\0';
+            size_t ip_len = strlen(client_ip);
+            size_t copy_len = (ip_len < CLIENT_IP_MAX_LENGTH - 1) ? ip_len : CLIENT_IP_MAX_LENGTH - 1;
+            memcpy(pss->client_ip, client_ip, copy_len);
+            pss->client_ip[copy_len] = '\0';
+            
+            // Initialize NIP-42 authentication state
+            pss->authenticated = 0;
+            pss->nip42_auth_required_events = get_config_bool("nip42_auth_required_events", 0);
+            pss->nip42_auth_required_subscriptions = get_config_bool("nip42_auth_required_subscriptions", 0);
+            pss->auth_challenge_sent = 0;
+            memset(pss->authenticated_pubkey, 0, sizeof(pss->authenticated_pubkey));
+            memset(pss->active_challenge, 0, sizeof(pss->active_challenge));
+            pss->challenge_created = 0;
+            pss->challenge_expires = 0;
+            break;
+            
+        case LWS_CALLBACK_RECEIVE:
+            if (len > 0) {
+                char *message = malloc(len + 1);
+                if (message) {
+                    memcpy(message, in, len);
+                    message[len] = '\0';
+                    
+                    // Parse JSON message (this is the normal program flow)
+                    cJSON* json = cJSON_Parse(message);
+                    if (json && cJSON_IsArray(json)) {
+                        // Log the complete parsed JSON message once
+                        char* complete_message = cJSON_Print(json);
+                        if (complete_message) {
+                            char debug_msg[2048];
+                            snprintf(debug_msg, sizeof(debug_msg),
+                                     "Received complete WebSocket message: %s", complete_message);
+                            log_info(debug_msg);
+                            free(complete_message);
+                        }
+                        // Get message type
+                        cJSON* type = cJSON_GetArrayItem(json, 0);
+                        if (type && cJSON_IsString(type)) {
+                            const char* msg_type = cJSON_GetStringValue(type);
+                            
+                            if (strcmp(msg_type, "EVENT") == 0) {
+                                // Extract event for kind-specific NIP-42 authentication check
+                                cJSON* event_obj = cJSON_GetArrayItem(json, 1);
+                                if (event_obj && cJSON_IsObject(event_obj)) {
+                                    // Extract event kind for kind-specific NIP-42 authentication check
+                                    cJSON* kind_obj = cJSON_GetObjectItem(event_obj, "kind");
+                                    int event_kind = kind_obj && cJSON_IsNumber(kind_obj) ? (int)cJSON_GetNumberValue(kind_obj) : -1;
+                                    
+                                    // Extract pubkey and event ID for debugging
+                                    cJSON* pubkey_obj = cJSON_GetObjectItem(event_obj, "pubkey");
+                                    cJSON* id_obj = cJSON_GetObjectItem(event_obj, "id");
+                                    const char* event_pubkey = pubkey_obj ? cJSON_GetStringValue(pubkey_obj) : "unknown";
+                                    const char* event_id = id_obj ? cJSON_GetStringValue(id_obj) : "unknown";
+                                    
+                                    char debug_event_msg[512];
+                                    snprintf(debug_event_msg, sizeof(debug_event_msg),
+                                            "DEBUG EVENT: Processing kind %d event from pubkey %.16s... ID %.16s...",
+                                            event_kind, event_pubkey, event_id);
+                                    log_info(debug_event_msg);
+                                    
+                                    // Check if NIP-42 authentication is required for this event kind or globally
+                                    int auth_required = is_nip42_auth_globally_required() || is_nip42_auth_required_for_kind(event_kind);
+
+                                    char debug_auth_msg[256];
+                                    snprintf(debug_auth_msg, sizeof(debug_auth_msg),
+                                            "DEBUG AUTH: auth_required=%d, pss->authenticated=%d, event_kind=%d",
+                                            auth_required, pss ? pss->authenticated : -1, event_kind);
+                                    log_info(debug_auth_msg);
+
+                                    if (pss && auth_required && !pss->authenticated) {
+                                        if (!pss->auth_challenge_sent) {
+                                            log_info("DEBUG AUTH: Sending NIP-42 authentication challenge");
+                                            send_nip42_auth_challenge(wsi, pss);
+                                        } else {
+                                            char auth_msg[256];
+                                            if (event_kind == 4 || event_kind == 14) {
+                                                snprintf(auth_msg, sizeof(auth_msg),
+                                                        "NIP-42 authentication required for direct message events (kind %d)", event_kind);
+                                            } else {
+                                                snprintf(auth_msg, sizeof(auth_msg),
+                                                        "NIP-42 authentication required for event kind %d", event_kind);
+                                            }
+                                            send_notice_message(wsi, auth_msg);
+                                            log_warning("Event rejected: NIP-42 authentication required for kind");
+                                            char debug_msg[128];
+                                            snprintf(debug_msg, sizeof(debug_msg), "Auth required for kind %d", event_kind);
+                                            log_info(debug_msg);
+                                        }
+                                        cJSON_Delete(json);
+                                        free(message);
+                                        return 0;
+                                    }
+
+                                    // Check blacklist/whitelist rules regardless of NIP-42 auth settings
+                                    // Blacklist should always be enforced
+                                    if (event_pubkey) {
+                                        // Forward declaration for auth rules checking function
+                                        extern int check_database_auth_rules(const char *pubkey, const char *operation, const char *resource_hash);
+
+                                        int auth_rules_result = check_database_auth_rules(event_pubkey, "event", NULL);
+                                        if (auth_rules_result != 0) { // 0 = NOSTR_SUCCESS, non-zero = blocked
+                                            char auth_rules_msg[256];
+                                            if (auth_rules_result == -101) { // NOSTR_ERROR_AUTH_REQUIRED
+                                                snprintf(auth_rules_msg, sizeof(auth_rules_msg),
+                                                        "blocked: pubkey not authorized (blacklist/whitelist violation)");
+                                            } else {
+                                                snprintf(auth_rules_msg, sizeof(auth_rules_msg),
+                                                        "blocked: authorization check failed (error %d)", auth_rules_result);
+                                            }
+                                            send_notice_message(wsi, auth_rules_msg);
+                                            log_warning("Event rejected: blacklist/whitelist violation");
+
+                                            // Send OK response with false status
+                                            cJSON* response = cJSON_CreateArray();
+                                            cJSON_AddItemToArray(response, cJSON_CreateString("OK"));
+                                            cJSON_AddItemToArray(response, cJSON_CreateString(event_id));
+                                            cJSON_AddItemToArray(response, cJSON_CreateBool(0)); // false = rejected
+                                            cJSON_AddItemToArray(response, cJSON_CreateString(auth_rules_msg));
+
+                                            char *response_str = cJSON_Print(response);
+                                            if (response_str) {
+                                                size_t response_len = strlen(response_str);
+                                                unsigned char *buf = malloc(LWS_PRE + response_len);
+                                                if (buf) {
+                                                    memcpy(buf + LWS_PRE, response_str, response_len);
+                                                    lws_write(wsi, buf + LWS_PRE, response_len, LWS_WRITE_TEXT);
+                                                    free(buf);
+                                                }
+                                                free(response_str);
+                                            }
+                                            cJSON_Delete(response);
+
+                                            cJSON_Delete(json);
+                                            free(message);
+                                            return 0;
+                                        }
+                                    }
+                                }
+                                
+                                // Handle EVENT message
+                                cJSON* event = cJSON_GetArrayItem(json, 1);
+                                if (event && cJSON_IsObject(event)) {
+                                    // Extract event JSON string for unified validator
+                                    char *event_json_str = cJSON_Print(event);
+                                    if (!event_json_str) {
+                                        log_error("Failed to serialize event JSON for validation");
+                                        cJSON* error_response = cJSON_CreateArray();
+                                        cJSON_AddItemToArray(error_response, cJSON_CreateString("OK"));
+                                        cJSON_AddItemToArray(error_response, cJSON_CreateString("unknown"));
+                                        cJSON_AddItemToArray(error_response, cJSON_CreateBool(0));
+                                        cJSON_AddItemToArray(error_response, cJSON_CreateString("error: failed to process event"));
+                                        
+                                        char *error_str = cJSON_Print(error_response);
+                                        if (error_str) {
+                                            size_t error_len = strlen(error_str);
+                                            unsigned char *buf = malloc(LWS_PRE + error_len);
+                                            if (buf) {
+                                                memcpy(buf + LWS_PRE, error_str, error_len);
+                                                lws_write(wsi, buf + LWS_PRE, error_len, LWS_WRITE_TEXT);
+                                                free(buf);
+                                            }
+                                            free(error_str);
+                                        }
+                                        cJSON_Delete(error_response);
+                                        return 0;
+                                    }
+                                    
+                                    log_info("DEBUG VALIDATION: Starting unified validator");
+                                    
+                                    // Call unified validator with JSON string
+                                    size_t event_json_len = strlen(event_json_str);
+                                    int validation_result = nostr_validate_unified_request(event_json_str, event_json_len);
+                                    
+                                    // Map validation result to old result format (0 = success, -1 = failure)
+                                    int result = (validation_result == NOSTR_SUCCESS) ? 0 : -1;
+                                    
+                                    char debug_validation_msg[256];
+                                    snprintf(debug_validation_msg, sizeof(debug_validation_msg),
+                                            "DEBUG VALIDATION: validation_result=%d, result=%d", validation_result, result);
+                                    log_info(debug_validation_msg);
+                                    
+                                    // Generate error message based on validation result
+                                    char error_message[512] = {0};
+                                    if (result != 0) {
+                                        switch (validation_result) {
+                                            case NOSTR_ERROR_INVALID_INPUT:
+                                                strncpy(error_message, "invalid: malformed event structure", sizeof(error_message) - 1);
+                                                break;
+                                            case NOSTR_ERROR_EVENT_INVALID_SIGNATURE:
+                                                strncpy(error_message, "invalid: signature verification failed", sizeof(error_message) - 1);
+                                                break;
+                                            case NOSTR_ERROR_EVENT_INVALID_ID:
+                                                strncpy(error_message, "invalid: event id verification failed", sizeof(error_message) - 1);
+                                                break;
+                                            case NOSTR_ERROR_EVENT_INVALID_PUBKEY:
+                                                strncpy(error_message, "invalid: invalid pubkey format", sizeof(error_message) - 1);
+                                                break;
+                                            case -103: // NOSTR_ERROR_EVENT_EXPIRED
+                                                strncpy(error_message, "rejected: event expired", sizeof(error_message) - 1);
+                                                break;
+                                            case -102: // NOSTR_ERROR_NIP42_DISABLED
+                                                strncpy(error_message, "auth-required: NIP-42 authentication required", sizeof(error_message) - 1);
+                                                break;
+                                            case -101: // NOSTR_ERROR_AUTH_REQUIRED
+                                                strncpy(error_message, "blocked: pubkey not authorized", sizeof(error_message) - 1);
+                                                break;
+                                            default:
+                                                strncpy(error_message, "error: validation failed", sizeof(error_message) - 1);
+                                                break;
+                                        }
+                                        char debug_error_msg[256];
+                                        snprintf(debug_error_msg, sizeof(debug_error_msg),
+                                                "DEBUG VALIDATION ERROR: %s", error_message);
+                                        log_warning(debug_error_msg);
+                                    } else {
+                                        log_info("DEBUG VALIDATION: Event validated successfully using unified validator");
+                                    }
+                                    
+                                    // Cleanup event JSON string
+                                    free(event_json_str);
+                                    
+                                    // Check for admin events (kind 23456) and intercept them
+                                    if (result == 0) {
+                                        cJSON* kind_obj = cJSON_GetObjectItem(event, "kind");
+                                        if (kind_obj && cJSON_IsNumber(kind_obj)) {
+                                            int event_kind = (int)cJSON_GetNumberValue(kind_obj);
+                                            
+                                            log_info("DEBUG ADMIN: Checking if admin event processing is needed");
+                                            
+                                            // Log reception of Kind 23456 events
+                                            if (event_kind == 23456) {
+                                                char* event_json_debug = cJSON_Print(event);
+                                                char debug_received_msg[1024];
+                                                snprintf(debug_received_msg, sizeof(debug_received_msg),
+                                                        "RECEIVED Kind %d event: %s", event_kind,
+                                                        event_json_debug ? event_json_debug : "Failed to serialize");
+                                                log_info(debug_received_msg);
+                                                
+                                                if (event_json_debug) {
+                                                    free(event_json_debug);
+                                                }
+                                            }
+                                            
+                                            if (event_kind == 23456) {
+                                                // Enhanced admin event security - check authorization first
+                                                log_info("DEBUG ADMIN: Admin event detected, checking authorization");
+                                                
+                                                char auth_error[512] = {0};
+                                                int auth_result = is_authorized_admin_event(event, auth_error, sizeof(auth_error));
+                                                
+                                                if (auth_result != 0) {
+                                                    // Authorization failed - log and reject
+                                                    log_warning("DEBUG ADMIN: Admin event authorization failed");
+                                                    result = -1;
+                                                    size_t error_len = strlen(auth_error);
+                                                    size_t copy_len = (error_len < sizeof(error_message) - 1) ? error_len : sizeof(error_message) - 1;
+                                                    memcpy(error_message, auth_error, copy_len);
+                                                    error_message[copy_len] = '\0';
+                                                    
+                                                    char debug_auth_error_msg[600];
+                                                    snprintf(debug_auth_error_msg, sizeof(debug_auth_error_msg),
+                                                            "DEBUG ADMIN AUTH ERROR: %.400s", auth_error);
+                                                    log_warning(debug_auth_error_msg);
+                                                } else {
+                                                    // Authorization successful - process through admin API
+                                                    log_info("DEBUG ADMIN: Admin event authorized, processing through admin API");
+                                                    
+                                                    char admin_error[512] = {0};
+                                                    int admin_result = process_admin_event_in_config(event, admin_error, sizeof(admin_error), wsi);
+                                                    
+                                                    char debug_admin_msg[256];
+                                                    snprintf(debug_admin_msg, sizeof(debug_admin_msg),
+                                                            "DEBUG ADMIN: process_admin_event_in_config returned %d", admin_result);
+                                                    log_info(debug_admin_msg);
+                                                    
+                                                    // Log results for Kind 23456 events
+                                                    if (event_kind == 23456) {
+                                                        if (admin_result == 0) {
+                                                            char success_result_msg[256];
+                                                            snprintf(success_result_msg, sizeof(success_result_msg),
+                                                                    "SUCCESS: Kind %d event processed successfully", event_kind);
+                                                            log_success(success_result_msg);
+                                                        } else {
+                                                            char error_result_msg[512];
+                                                            snprintf(error_result_msg, sizeof(error_result_msg),
+                                                                    "ERROR: Kind %d event processing failed: %s", event_kind, admin_error);
+                                                            log_error(error_result_msg);
+                                                        }
+                                                    }
+                                                    
+                                                    if (admin_result != 0) {
+                                                        log_error("DEBUG ADMIN: Failed to process admin event through admin API");
+                                                        result = -1;
+                                                        size_t error_len = strlen(admin_error);
+                                                        size_t copy_len = (error_len < sizeof(error_message) - 1) ? error_len : sizeof(error_message) - 1;
+                                                        memcpy(error_message, admin_error, copy_len);
+                                                        error_message[copy_len] = '\0';
+                                                        
+                                                        char debug_admin_error_msg[600];
+                                                        snprintf(debug_admin_error_msg, sizeof(debug_admin_error_msg),
+                                                                "DEBUG ADMIN ERROR: %.400s", admin_error);
+                                                        log_error(debug_admin_error_msg);
+                                                    } else {
+                                                        log_success("DEBUG ADMIN: Admin event processed successfully through admin API");
+                                                        // Admin events are processed by the admin API, not broadcast to subscriptions
+                                                    }
+                                                }
+                                            } else {
+                                                // Regular event - store in database and broadcast
+                                                log_info("DEBUG STORAGE: Regular event - storing in database");
+                                                if (store_event(event) != 0) {
+                                                    log_error("DEBUG STORAGE: Failed to store event in database");
+                                                    result = -1;
+                                                    strncpy(error_message, "error: failed to store event", sizeof(error_message) - 1);
+                                                } else {
+                                                    log_info("DEBUG STORAGE: Event stored successfully in database");
+                                                    // Broadcast event to matching persistent subscriptions
+                                                    int broadcast_count = broadcast_event_to_subscriptions(event);
+                                                    char debug_broadcast_msg[128];
+                                                    snprintf(debug_broadcast_msg, sizeof(debug_broadcast_msg),
+                                                            "DEBUG BROADCAST: Event broadcast to %d subscriptions", broadcast_count);
+                                                    log_info(debug_broadcast_msg);
+                                                }
+                                            }
+                                        } else {
+                                            // Event without valid kind - try normal storage
+                                            log_warning("DEBUG STORAGE: Event without valid kind - trying normal storage");
+                                            if (store_event(event) != 0) {
+                                                log_error("DEBUG STORAGE: Failed to store event without kind in database");
+                                                result = -1;
+                                                strncpy(error_message, "error: failed to store event", sizeof(error_message) - 1);
+                                            } else {
+                                                log_info("DEBUG STORAGE: Event without kind stored successfully in database");
+                                                broadcast_event_to_subscriptions(event);
+                                            }
+                                        }
+                                    }
+                                    
+                                    // Send OK response
+                                    cJSON* event_id = cJSON_GetObjectItem(event, "id");
+                                    if (event_id && cJSON_IsString(event_id)) {
+                                        cJSON* response = cJSON_CreateArray();
+                                        cJSON_AddItemToArray(response, cJSON_CreateString("OK"));
+                                        cJSON_AddItemToArray(response, cJSON_CreateString(cJSON_GetStringValue(event_id)));
+                                        cJSON_AddItemToArray(response, cJSON_CreateBool(result == 0));
+                                        cJSON_AddItemToArray(response, cJSON_CreateString(strlen(error_message) > 0 ? error_message : ""));
+                                        
+                                        // TODO: REPLACE - Remove wasteful cJSON_Print conversion
+                                        char *response_str = cJSON_Print(response);
+                                        if (response_str) {
+                                            char debug_response_msg[512];
+                                            snprintf(debug_response_msg, sizeof(debug_response_msg),
+                                                    "DEBUG RESPONSE: Sending OK response: %s", response_str);
+                                            log_info(debug_response_msg);
+                                            
+                                            size_t response_len = strlen(response_str);
+                                            unsigned char *buf = malloc(LWS_PRE + response_len);
+                                            if (buf) {
+                                                memcpy(buf + LWS_PRE, response_str, response_len);
+                                                int write_result = lws_write(wsi, buf + LWS_PRE, response_len, LWS_WRITE_TEXT);
+                                                
+                                                char debug_write_msg[128];
+                                                snprintf(debug_write_msg, sizeof(debug_write_msg),
+                                                        "DEBUG RESPONSE: lws_write returned %d", write_result);
+                                                log_info(debug_write_msg);
+                                                
+                                                free(buf);
+                                            }
+                                            free(response_str);
+                                        }
+                                        cJSON_Delete(response);
+                                    }
+                                }
+                            } else if (strcmp(msg_type, "REQ") == 0) {
+                                // Check NIP-42 authentication for REQ subscriptions if required
+                                if (pss && pss->nip42_auth_required_subscriptions && !pss->authenticated) {
+                                    if (!pss->auth_challenge_sent) {
+                                        send_nip42_auth_challenge(wsi, pss);
+                                    } else {
+                                        send_notice_message(wsi, "NIP-42 authentication required for subscriptions");
+                                        log_warning("REQ rejected: NIP-42 authentication required");
+                                    }
+                                    cJSON_Delete(json);
+                                    free(message);
+                                    return 0;
+                                }
+                                
+                                // Handle REQ message
+                                cJSON* sub_id = cJSON_GetArrayItem(json, 1);
+                                
+                                if (sub_id && cJSON_IsString(sub_id)) {
+                                    const char* subscription_id = cJSON_GetStringValue(sub_id);
+                                    
+                                    // Create array of filter objects from position 2 onwards
+                                    cJSON* filters = cJSON_CreateArray();
+                                    int json_size = cJSON_GetArraySize(json);
+                                    for (int i = 2; i < json_size; i++) {
+                                        cJSON* filter = cJSON_GetArrayItem(json, i);
+                                        if (filter) {
+                                            cJSON_AddItemToArray(filters, cJSON_Duplicate(filter, 1));
+                                        }
+                                    }
+                                    
+                                    handle_req_message(subscription_id, filters, wsi, pss);
+                                    
+                                    // Clean up the filters array we created
+                                    cJSON_Delete(filters);
+                                    
+                                    // Send EOSE (End of Stored Events)
+                                    cJSON* eose_response = cJSON_CreateArray();
+                                    cJSON_AddItemToArray(eose_response, cJSON_CreateString("EOSE"));
+                                    cJSON_AddItemToArray(eose_response, cJSON_CreateString(subscription_id));
+                                    
+                                    char *eose_str = cJSON_Print(eose_response);
+                                    if (eose_str) {
+                                        size_t eose_len = strlen(eose_str);
+                                        unsigned char *buf = malloc(LWS_PRE + eose_len);
+                                        if (buf) {
+                                            memcpy(buf + LWS_PRE, eose_str, eose_len);
+                                            lws_write(wsi, buf + LWS_PRE, eose_len, LWS_WRITE_TEXT);
+                                            free(buf);
+                                        }
+                                        free(eose_str);
+                                    }
+                                    cJSON_Delete(eose_response);
+                                }
+                            } else if (strcmp(msg_type, "CLOSE") == 0) {
+                                // Handle CLOSE message
+                                cJSON* sub_id = cJSON_GetArrayItem(json, 1);
+                                if (sub_id && cJSON_IsString(sub_id)) {
+                                    const char* subscription_id = cJSON_GetStringValue(sub_id);
+                                    
+                                    // Remove from global manager
+                                    remove_subscription_from_manager(subscription_id, wsi);
+                                    
+                                    // Remove from session list if present
+                                    if (pss) {
+                                        pthread_mutex_lock(&pss->session_lock);
+                                        
+                                        struct subscription** current = &pss->subscriptions;
+                                        while (*current) {
+                                            if (strcmp((*current)->id, subscription_id) == 0) {
+                                                struct subscription* to_remove = *current;
+                                                *current = to_remove->session_next;
+                                                pss->subscription_count--;
+                                                break;
+                                            }
+                                            current = &((*current)->session_next);
+                                        }
+                                        
+                                        pthread_mutex_unlock(&pss->session_lock);
+                                    }
+                                    
+                                    char debug_msg[256];
+                                    snprintf(debug_msg, sizeof(debug_msg), "Closed subscription: %s", subscription_id);
+                                    log_info(debug_msg);
+                                }
+                            } else if (strcmp(msg_type, "AUTH") == 0) {
+                                // Handle NIP-42 AUTH message
+                                if (cJSON_GetArraySize(json) >= 2) {
+                                    cJSON* auth_payload = cJSON_GetArrayItem(json, 1);
+                                    
+                                    if (cJSON_IsString(auth_payload)) {
+                                        // AUTH challenge response: ["AUTH", <challenge>] (unusual)
+                                        handle_nip42_auth_challenge_response(wsi, pss, cJSON_GetStringValue(auth_payload));
+                                    } else if (cJSON_IsObject(auth_payload)) {
+                                        // AUTH signed event: ["AUTH", <event>] (standard NIP-42)
+                                        handle_nip42_auth_signed_event(wsi, pss, auth_payload);
+                                    } else {
+                                        send_notice_message(wsi, "Invalid AUTH message format");
+                                        log_warning("Received AUTH message with invalid payload type");
+                                    }
+                                } else {
+                                    send_notice_message(wsi, "AUTH message requires payload");
+                                    log_warning("Received AUTH message without payload");
+                                }
+                            } else {
+                                // Unknown message type
+                                char unknown_msg[128];
+                                snprintf(unknown_msg, sizeof(unknown_msg), "Unknown message type: %.32s", msg_type);
+                                log_warning(unknown_msg);
+                                send_notice_message(wsi, "Unknown message type");
+                            }
+                        }
+                    }
+                    
+                    if (json) cJSON_Delete(json);
+                    free(message);
+                }
+            }
+            break;
+            
+        case LWS_CALLBACK_CLOSED:
+            log_info("WebSocket connection closed");
+            
+            // Clean up session subscriptions
+            if (pss) {
+                pthread_mutex_lock(&pss->session_lock);
+                
+                struct subscription* sub = pss->subscriptions;
+                while (sub) {
+                    struct subscription* next = sub->session_next;
+                    remove_subscription_from_manager(sub->id, wsi);
+                    sub = next;
+                }
+                
+                pss->subscriptions = NULL;
+                pss->subscription_count = 0;
+                
+                pthread_mutex_unlock(&pss->session_lock);
+                pthread_mutex_destroy(&pss->session_lock);
+            }
+            break;
+            
+        default:
+            break;
+    }
+    
+    return 0;
+}
+
+// WebSocket protocol definition
+static struct lws_protocols protocols[] = {
+    {
+        "nostr-relay-protocol",
+        nostr_relay_callback,
+        sizeof(struct per_session_data),
+        4096, // rx buffer size
+        0, NULL, 0
+    },
+    { NULL, NULL, 0, 0, 0, NULL, 0 } // terminator
+};
+
+// Check if a port is available for binding
+int check_port_available(int port) {
+    int sockfd;
+    struct sockaddr_in addr;
+    int result;
+    int reuse = 1;
+
+    // Create a socket
+    sockfd = socket(AF_INET, SOCK_STREAM, 0);
+    if (sockfd < 0) {
+        return 0; // Cannot create socket, assume port unavailable
+    }
+
+    // Set SO_REUSEADDR to allow binding to ports in TIME_WAIT state
+    // This matches libwebsockets behavior and prevents false unavailability
+    if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &reuse, sizeof(reuse)) < 0) {
+        close(sockfd);
+        return 0; // Failed to set socket option
+    }
+
+    // Set up the address structure
+    memset(&addr, 0, sizeof(addr));
+    addr.sin_family = AF_INET;
+    addr.sin_addr.s_addr = INADDR_ANY;
+    addr.sin_port = htons(port);
+
+    // Try to bind to the port
+    result = bind(sockfd, (struct sockaddr*)&addr, sizeof(addr));
+    
+    // Close the socket
+    close(sockfd);
+
+    // Return 1 if bind succeeded (port available), 0 if failed (port in use)
+    return (result == 0) ? 1 : 0;
+}
+
+// Start libwebsockets-based WebSocket Nostr relay server
+int start_websocket_relay(int port_override, int strict_port) {
+    struct lws_context_creation_info info;
+
+    log_info("Starting libwebsockets-based Nostr relay server...");
+
+    memset(&info, 0, sizeof(info));
+    // Use port override if provided, otherwise use configuration
+    int configured_port = (port_override > 0) ? port_override : get_config_int("relay_port", DEFAULT_PORT);
+    int actual_port = configured_port;
+    int port_attempts = 0;
+    const int max_port_attempts = 10;  // Increased from 5 to 10
+
+    // Minimal libwebsockets configuration
+    info.protocols = protocols;
+    info.gid = -1;
+    info.uid = -1;
+    info.options = LWS_SERVER_OPTION_VALIDATE_UTF8;
+
+    // Remove interface restrictions - let system choose
+    // info.vhost_name = NULL;
+    // info.iface = NULL;
+
+    // Increase max connections for relay usage
+    info.max_http_header_pool = 16;
+    info.timeout_secs = 10;
+
+    // Max payload size for Nostr events
+    info.max_http_header_data = 4096;
+
+    // Find an available port with pre-checking (or fail immediately in strict mode)
+    while (port_attempts < (strict_port ? 1 : max_port_attempts)) {
+        char attempt_msg[256];
+        snprintf(attempt_msg, sizeof(attempt_msg), "Checking port availability: %d", actual_port);
+        log_info(attempt_msg);
+        
+        // Pre-check if port is available
+        if (!check_port_available(actual_port)) {
+            port_attempts++;
+            if (strict_port) {
+                char error_msg[256];
+                snprintf(error_msg, sizeof(error_msg),
+                         "Strict port mode: port %d is not available", actual_port);
+                log_error(error_msg);
+                return -1;
+            } else if (port_attempts < max_port_attempts) {
+                char retry_msg[256];
+                snprintf(retry_msg, sizeof(retry_msg), "Port %d is in use, trying port %d (attempt %d/%d)",
+                         actual_port, actual_port + 1, port_attempts + 1, max_port_attempts);
+                log_warning(retry_msg);
+                actual_port++;
+                continue;
+            } else {
+                char error_msg[512];
+                snprintf(error_msg, sizeof(error_msg),
+                         "Failed to find available port after %d attempts (tried ports %d-%d)",
+                         max_port_attempts, configured_port, actual_port);
+                log_error(error_msg);
+                return -1;
+            }
+        }
+        
+        // Port appears available, try creating libwebsockets context
+        info.port = actual_port;
+        
+        char binding_msg[256];
+        snprintf(binding_msg, sizeof(binding_msg), "Attempting to bind libwebsockets to port %d", actual_port);
+        log_info(binding_msg);
+        
+        ws_context = lws_create_context(&info);
+        if (ws_context) {
+            // Success! Port binding worked
+            break;
+        }
+        
+        // libwebsockets failed even though port check passed
+        // This could be due to timing or different socket options
+        int errno_saved = errno;
+        char lws_error_msg[256];
+        snprintf(lws_error_msg, sizeof(lws_error_msg),
+                 "libwebsockets failed to bind to port %d (errno: %d)", actual_port, errno_saved);
+        log_warning(lws_error_msg);
+        
+        port_attempts++;
+        if (strict_port) {
+            char error_msg[256];
+            snprintf(error_msg, sizeof(error_msg),
+                     "Strict port mode: failed to bind to port %d", actual_port);
+            log_error(error_msg);
+            break;
+        } else if (port_attempts < max_port_attempts) {
+            actual_port++;
+            continue;
+        }
+        
+        // If we get here, we've exhausted attempts
+        break;
+    }
+
+    if (!ws_context) {
+        char error_msg[512];
+        snprintf(error_msg, sizeof(error_msg),
+                 "Failed to create libwebsockets context after %d attempts. Last attempted port: %d",
+                 port_attempts, actual_port);
+        log_error(error_msg);
+        perror("libwebsockets creation error");
+        return -1;
+    }
+
+    char startup_msg[256];
+    if (actual_port != configured_port) {
+        snprintf(startup_msg, sizeof(startup_msg),
+                 "WebSocket relay started on ws://127.0.0.1:%d (configured port %d was unavailable)",
+                 actual_port, configured_port);
+        log_warning(startup_msg);
+    } else {
+        snprintf(startup_msg, sizeof(startup_msg), "WebSocket relay started on ws://127.0.0.1:%d", actual_port);
+    }
+    log_success(startup_msg);
+
+    // Main event loop with proper signal handling
+    while (g_server_running) {
+        int result = lws_service(ws_context, 1000);
+
+        if (result < 0) {
+            log_error("libwebsockets service error");
+            break;
+        }
+    }
+
+    log_info("Shutting down WebSocket server...");
+    lws_context_destroy(ws_context);
+    ws_context = NULL;
+
+    log_success("WebSocket relay shut down cleanly");
+    return 0;
+}

src/websockets.h

@@ -0,0 +1,49 @@
+// WebSocket protocol structures and constants for C-Relay
+// This header defines structures shared between main.c and websockets.c
+
+#ifndef WEBSOCKETS_H
+#define WEBSOCKETS_H
+
+#include <pthread.h>
+#include <libwebsockets.h>
+#include <time.h>
+#include "../nostr_core_lib/cjson/cJSON.h"
+#include "config.h"  // For CLIENT_IP_MAX_LENGTH and MAX_SUBSCRIPTIONS_PER_CLIENT
+
+// Constants
+#define CHALLENGE_MAX_LENGTH 128
+#define AUTHENTICATED_PUBKEY_MAX_LENGTH 65  // 64 hex + null
+
+// Enhanced per-session data with subscription management and NIP-42 authentication
+struct per_session_data {
+    int authenticated;
+    struct subscription* subscriptions;      // Head of this session's subscription list
+    pthread_mutex_t session_lock;           // Per-session thread safety
+    char client_ip[CLIENT_IP_MAX_LENGTH];   // Client IP for logging
+    int subscription_count;                  // Number of subscriptions for this session
+
+    // NIP-42 Authentication State
+    char authenticated_pubkey[65];           // Authenticated public key (64 hex + null)
+    char active_challenge[65];               // Current challenge for this session (64 hex + null)
+    time_t challenge_created;                // When challenge was created
+    time_t challenge_expires;                // Challenge expiration time
+    int nip42_auth_required_events;          // Whether NIP-42 auth is required for EVENT submission
+    int nip42_auth_required_subscriptions;   // Whether NIP-42 auth is required for REQ operations
+    int auth_challenge_sent;                 // Whether challenge has been sent (0/1)
+};
+
+// NIP-11 HTTP session data structure for managing buffer lifetime
+struct nip11_session_data {
+    char* json_buffer;
+    size_t json_length;
+    int headers_sent;
+    int body_sent;
+};
+
+// Function declarations
+int start_websocket_relay(int port_override, int strict_port);
+
+// Auth rules checking function from request_validator.c
+int check_database_auth_rules(const char *pubkey, const char *operation, const char *resource_hash);
+
+#endif // WEBSOCKETS_H

tests/1_nip_test.sh

@@ -146,27 +146,115 @@ test_subscription() {
     local filter="$2"
     local description="$3"
     local expected_count="$4"
-    
+
     print_step "Testing subscription: $description"
-    
+
     # Create REQ message
     local req_message="[\"REQ\",\"$sub_id\",$filter]"
-    
+
     print_info "Testing filter: $filter"
-    
+
     # Send subscription and collect events
     local response=""
     if command -v websocat &> /dev/null; then
         response=$(echo -e "$req_message\n[\"CLOSE\",\"$sub_id\"]" | timeout 3s websocat "$RELAY_URL" 2>/dev/null || echo "")
     fi
-    
-    
+
+
     # Count EVENT responses (lines containing ["EVENT","sub_id",...])
     local event_count=0
+    local filter_mismatch_count=0
     if [[ -n "$response" ]]; then
         event_count=$(echo "$response" | grep -c "\"EVENT\"" 2>/dev/null || echo "0")
+        filter_mismatch_count=$(echo "$response" | grep -c "filter does not match" 2>/dev/null || echo "0")
     fi
-    
+
+    # Clean up the filter_mismatch_count (remove any extra spaces/newlines)
+    filter_mismatch_count=$(echo "$filter_mismatch_count" | tr -d '[:space:]' | sed 's/[^0-9]//g')
+    if [[ -z "$filter_mismatch_count" ]]; then
+        filter_mismatch_count=0
+    fi
+
+    # Debug: Show what we found
+    print_info "Found $event_count events, $filter_mismatch_count filter mismatches"
+
+    # Check for filter mismatches (protocol violation)
+    if [[ "$filter_mismatch_count" -gt 0 ]]; then
+        print_error "$description - PROTOCOL VIOLATION: Relay sent $filter_mismatch_count events that don't match filter!"
+        print_error "Filter: $filter"
+        print_error "This indicates improper server-side filtering - relay should only send matching events"
+        return 1
+    fi
+
+    # Additional check: Analyze returned events against filter criteria
+    local filter_violation_count=0
+    if [[ -n "$response" && "$event_count" -gt 0 ]]; then
+        # Parse filter to check for violations
+        if echo "$filter" | grep -q '"kinds":\['; then
+            # Kind filter - check that all returned events have matching kinds
+            local allowed_kinds=$(echo "$filter" | sed 's/.*"kinds":\[\([^]]*\)\].*/\1/' | sed 's/[^0-9,]//g')
+            echo "$response" | grep '"EVENT"' | while IFS= read -r event_line; do
+                local event_kind=$(echo "$event_line" | jq -r '.[2].kind' 2>/dev/null)
+                if [[ -n "$event_kind" && "$event_kind" =~ ^[0-9]+$ ]]; then
+                    local kind_matches=0
+                    IFS=',' read -ra KIND_ARRAY <<< "$allowed_kinds"
+                    for kind in "${KIND_ARRAY[@]}"; do
+                        if [[ "$event_kind" == "$kind" ]]; then
+                            kind_matches=1
+                            break
+                        fi
+                    done
+                    if [[ "$kind_matches" == "0" ]]; then
+                        ((filter_violation_count++))
+                    fi
+                fi
+            done
+        elif echo "$filter" | grep -q '"ids":\['; then
+            # ID filter - check that all returned events have matching IDs
+            local allowed_ids=$(echo "$filter" | sed 's/.*"ids":\[\([^]]*\)\].*/\1/' | sed 's/"//g' | sed 's/[][]//g')
+            echo "$response" | grep '"EVENT"' | while IFS= read -r event_line; do
+                local event_id=$(echo "$event_line" | jq -r '.[2].id' 2>/dev/null)
+                if [[ -n "$event_id" ]]; then
+                    local id_matches=0
+                    IFS=',' read -ra ID_ARRAY <<< "$allowed_ids"
+                    for id in "${ID_ARRAY[@]}"; do
+                        if [[ "$event_id" == "$id" ]]; then
+                            id_matches=1
+                            break
+                        fi
+                    done
+                    if [[ "$id_matches" == "0" ]]; then
+                        ((filter_violation_count++))
+                    fi
+                fi
+            done
+        fi
+    fi
+
+    # Report filter violations
+    if [[ "$filter_violation_count" -gt 0 ]]; then
+        print_error "$description - FILTER VIOLATION: $filter_violation_count events don't match the filter criteria!"
+        print_error "Filter: $filter"
+        print_error "Expected only events matching the filter, but received non-matching events"
+        print_error "This indicates improper server-side filtering"
+        return 1
+    fi
+
+    # Also fail on count mismatches for strict filters (like specific IDs and kinds with expected counts)
+    if [[ "$expected_count" != "any" && "$event_count" != "$expected_count" ]]; then
+        if echo "$filter" | grep -q '"ids":\['; then
+            print_error "$description - CRITICAL VIOLATION: ID filter should return exactly $expected_count event(s), got $event_count"
+            print_error "Filter: $filter"
+            print_error "ID queries must return exactly the requested event or none"
+            return 1
+        elif echo "$filter" | grep -q '"kinds":\[' && [[ "$expected_count" =~ ^[0-9]+$ ]]; then
+            print_error "$description - FILTER VIOLATION: Kind filter expected $expected_count event(s), got $event_count"
+            print_error "Filter: $filter"
+            print_error "This suggests improper filtering - events of wrong kinds are being returned"
+            return 1
+        fi
+    fi
+
     if [[ "$expected_count" == "any" ]]; then
         if [[ $event_count -gt 0 ]]; then
             print_success "$description - Found $event_count events"
@@ -178,7 +266,7 @@ test_subscription() {
     else
         print_warning "$description - Expected $expected_count events, found $event_count"
     fi
-    
+
     # Show a few sample events for verification (first 2)
     if [[ $event_count -gt 0 && "$description" == "All events" ]]; then
         print_info "Sample events (first 2):"
@@ -189,7 +277,7 @@ test_subscription() {
             echo "  - ID: ${event_id:0:16}... Kind: $event_kind Content: ${event_content:0:30}..."
         done
     fi
-    
+
     echo # Add blank line for readability
     return 0
 }
@@ -290,30 +378,64 @@ run_comprehensive_test() {
     
     # Test subscription filters
     print_step "Testing various subscription filters..."
-    
+
+    local test_failures=0
+
     # Test 1: Get all events
-    test_subscription "test_all" '{}' "All events" "any"
-    
+    if ! test_subscription "test_all" '{}' "All events" "any"; then
+        ((test_failures++))
+    fi
+
     # Test 2: Get events by kind
-    test_subscription "test_kind1" '{"kinds":[1]}' "Kind 1 events only" "2"
-    test_subscription "test_kind0" '{"kinds":[0]}' "Kind 0 events only" "any"
-    
+    if ! test_subscription "test_kind1" '{"kinds":[1]}' "Kind 1 events only" "any"; then
+        ((test_failures++))
+    fi
+    if ! test_subscription "test_kind0" '{"kinds":[0]}' "Kind 0 events only" "any"; then
+        ((test_failures++))
+    fi
+
     # Test 3: Get events by author (pubkey)
     local test_pubkey=$(echo "$regular1" | jq -r '.pubkey' 2>/dev/null)
-    test_subscription "test_author" "{\"authors\":[\"$test_pubkey\"]}" "Events by specific author" "any"
-    
+    if ! test_subscription "test_author" "{\"authors\":[\"$test_pubkey\"]}" "Events by specific author" "any"; then
+        ((test_failures++))
+    fi
+
     # Test 4: Get recent events (time-based)
     local recent_timestamp=$(($(date +%s) - 200))
-    test_subscription "test_recent" "{\"since\":$recent_timestamp}" "Recent events" "any"
-    
+    if ! test_subscription "test_recent" "{\"since\":$recent_timestamp}" "Recent events" "any"; then
+        ((test_failures++))
+    fi
+
     # Test 5: Get events with specific tags
-    test_subscription "test_tag_type" '{"#type":["regular"]}' "Events with type=regular tag" "any"
-    
+    if ! test_subscription "test_tag_type" '{"#type":["regular"]}' "Events with type=regular tag" "any"; then
+        ((test_failures++))
+    fi
+
     # Test 6: Multiple kinds
-    test_subscription "test_multi_kinds" '{"kinds":[0,1]}' "Multiple kinds (0,1)" "any"
-    
+    if ! test_subscription "test_multi_kinds" '{"kinds":[0,1]}' "Multiple kinds (0,1)" "any"; then
+        ((test_failures++))
+    fi
+
     # Test 7: Limit results
-    test_subscription "test_limit" '{"kinds":[1],"limit":1}' "Limited to 1 event" "1"
+    if ! test_subscription "test_limit" '{"kinds":[1],"limit":1}' "Limited to 1 event" "1"; then
+        ((test_failures++))
+    fi
+
+    # Test 8: Specific event ID query (tests for "filter does not match" bug)
+    if [[ ${#REGULAR_EVENT_IDS[@]} -gt 0 ]]; then
+        local test_event_id="${REGULAR_EVENT_IDS[0]}"
+        if ! test_subscription "test_specific_id" "{\"ids\":[\"$test_event_id\"]}" "Specific event ID query" "1"; then
+            ((test_failures++))
+        fi
+    fi
+
+    # Report subscription test results
+    if [[ $test_failures -gt 0 ]]; then
+        print_error "SUBSCRIPTION TESTS FAILED: $test_failures test(s) detected protocol violations"
+        return 1
+    else
+        print_success "All subscription tests passed"
+    fi
     
     print_header "PHASE 4: Database Verification"
     
@@ -321,17 +443,28 @@ run_comprehensive_test() {
     print_step "Verifying database contents..."
     
     if command -v sqlite3 &> /dev/null; then
-        print_info "Events by type in database:"
-        sqlite3 db/c_nostr_relay.db "SELECT event_type, COUNT(*) as count FROM events GROUP BY event_type;" | while read line; do
-            echo "  $line"
-        done
-        
-        print_info "Recent events in database:"
-        sqlite3 db/c_nostr_relay.db "SELECT substr(id, 1, 16) || '...' as short_id, event_type, kind, substr(content, 1, 30) || '...' as short_content FROM events ORDER BY created_at DESC LIMIT 5;" | while read line; do
-            echo "  $line"
-        done
-        
-        print_success "Database verification complete"
+        # Find the database file (should be in build/ directory with relay pubkey as filename)
+        local db_file=""
+        if [[ -d "../build" ]]; then
+            db_file=$(find ../build -name "*.db" -type f | head -1)
+        fi
+
+        if [[ -n "$db_file" && -f "$db_file" ]]; then
+            print_info "Events by type in database ($db_file):"
+            sqlite3 "$db_file" "SELECT event_type, COUNT(*) as count FROM events GROUP BY event_type;" 2>/dev/null | while read line; do
+                echo "  $line"
+            done
+
+            print_info "Recent events in database:"
+            sqlite3 "$db_file" "SELECT substr(id, 1, 16) || '...' as short_id, event_type, kind, substr(content, 1, 30) || '...' as short_content FROM events ORDER BY created_at DESC LIMIT 5;" 2>/dev/null | while read line; do
+                echo "  $line"
+            done
+
+            print_success "Database verification complete"
+        else
+            print_warning "Database file not found in build/ directory"
+            print_info "Expected database files: build/*.db (named after relay pubkey)"
+        fi
     else
         print_warning "sqlite3 not available for database verification"
     fi
@@ -352,6 +485,11 @@ if run_comprehensive_test; then
     exit 0
 else
     echo
-    print_error "Some tests failed"
+    print_error "❌ TESTS FAILED: Protocol violations detected!"
+    print_error "The C-Relay has critical issues that need to be fixed:"
+    print_error "  - Server-side filtering is not implemented properly"
+    print_error "  - Events are sent to clients regardless of subscription filters"
+    print_error "  - This violates the Nostr protocol specification"
+    echo
     exit 1
 fi

tests/nip42_test.log

@@ -0,0 +1,88 @@
+=== NIP-42 Authentication Test Started ===
+2025-09-30 11:15:28 - Starting NIP-42 authentication tests
+[INFO] === Starting NIP-42 Authentication Tests ===
+[INFO] Checking dependencies...
+[SUCCESS] Dependencies check complete
+[INFO] Test 1: Checking NIP-42 support in relay info
+[SUCCESS] NIP-42 is advertised in supported NIPs
+2025-09-30 11:15:28 - Supported NIPs: 1,9,11,13,15,20,40,42
+[INFO] Test 2: Testing AUTH challenge generation
+[INFO] Found admin private key, configuring NIP-42 authentication...
+[WARNING] Failed to create configuration event - proceeding with manual test
+[INFO] Test 3: Testing complete NIP-42 authentication flow
+[INFO] Generated test keypair: test_pubkey
+[INFO] Attempting to publish event without authentication...
+[INFO] Publishing test event to relay...
+2025-09-30 11:15:30 - Event publish result: connecting to ws://localhost:8888... ok.
+{"kind":1,"id":"acfc4da1903ce1c065f2c472348b21837a322c79cb4b248c62de5cff9b5b6607","pubkey":"d3e8d83eabac2a28e21039136a897399f4866893dd43bfbf0bdc8391913a4013","created_at":1759245329,"tags":[],"content":"NIP-42 test event - should require auth","sig":"2051b3da705214d5b5e95fb5b4dd9f1c893666965f7c51ccd2a9ccd495b67dd76ed3ce9768f0f2a16a3f9a602368e8102758ca3cc1408280094abf7e92fcc75e"}
+publishing to ws://localhost:8888... success.
+[SUCCESS] Relay requested authentication as expected
+[INFO] Test 4: Testing WebSocket AUTH message handling
+[INFO] Testing WebSocket connection and AUTH message...
+[INFO] Sending test message via WebSocket...
+2025-09-30 11:15:30 - WebSocket response: 
+[INFO] No AUTH challenge in WebSocket response
+[INFO] Test 5: Testing NIP-42 configuration options
+[INFO] Retrieving current relay configuration...
+[WARNING] Could not retrieve configuration events
+[INFO] Test 6: Testing NIP-42 performance and stability
+[INFO] Testing multiple authentication attempts...
+2025-09-30 11:15:31 - Attempt 1: .297874340s - connecting to ws://localhost:8888... ok.
+{"kind":1,"id":"0d742f093b7be0ce811068e7a6171573dd225418c9459f5c7e9580f57d88af7b","pubkey":"37d1a52ec83a837eb8c6ae46df5c892f338c65ae0c29eb4873e775082252a18a","created_at":1759245331,"tags":[],"content":"Performance test event 1","sig":"d4aec950c47fbd4c1da637b84fafbde570adf86e08795236fb6a3f7e12d2dbaa16cb38cbb68d3b9755d186b20800bdb84b0a050f8933d06b10991a9542fe9909"}
+publishing to ws://localhost:8888... success.
+2025-09-30 11:15:32 - Attempt 2: .270493759s - connecting to ws://localhost:8888... ok.
+{"kind":1,"id":"b45ae1b0458e284ed89b6de453bab489d506352680f6d37c8a5f0aed9eebc7a5","pubkey":"37d1a52ec83a837eb8c6ae46df5c892f338c65ae0c29eb4873e775082252a18a","created_at":1759245331,"tags":[],"content":"Performance test event 2","sig":"f9702aa537ec1485d151a0115c38c7f6f1bc05a63929be784e33850b46be6a961996eb922b8b337d607312c8e4583590ee35f38330300e19ab921f94926719c5"}
+publishing to ws://localhost:8888... success.
+2025-09-30 11:15:32 - Attempt 3: .239220029s - connecting to ws://localhost:8888... ok.
+{"kind":1,"id":"5f70f9cb2a30a12e7d088e62a9295ef2fbea4f40a1d8b07006db03f610c5abce","pubkey":"37d1a52ec83a837eb8c6ae46df5c892f338c65ae0c29eb4873e775082252a18a","created_at":1759245332,"tags":[],"content":"Performance test event 3","sig":"ea2e1611ce3ddea3aa73764f4542bad7d922fc0d2ed40e58dcc2a66cb6e046bfae22d6baef296eb51d965a22b2a07394fc5f8664e3a7777382ae523431c782cd"}
+publishing to ws://localhost:8888... success.
+2025-09-30 11:15:33 - Attempt 4: .221429674s - connecting to ws://localhost:8888... ok.
+{"kind":1,"id":"eafcf5f7e0bd0be35267f13ff93eef339faec6a5af13fe451fee2b7443b9de6e","pubkey":"37d1a52ec83a837eb8c6ae46df5c892f338c65ae0c29eb4873e775082252a18a","created_at":1759245332,"tags":[],"content":"Performance test event 4","sig":"976017abe67582af29d46cd54159ce0465c94caf348be35f26b6522cb48c4c9ce5ba9835e92873cf96a906605a032071360fc85beea815a8e4133a4f45d2bf0a"}
+publishing to ws://localhost:8888... success.
+2025-09-30 11:15:33 - Attempt 5: .242410067s - connecting to ws://localhost:8888... ok.
+{"kind":1,"id":"c7cf6776000a325b1180240c61ef20b849b84dee3f5d2efed4c1a9e9fbdbd7b1","pubkey":"37d1a52ec83a837eb8c6ae46df5c892f338c65ae0c29eb4873e775082252a18a","created_at":1759245333,"tags":[],"content":"Performance test event 5","sig":"18b4575bd644146451dcf86607d75f358828ce2907e8904bd08b903ff5d79ec5a69ff60168735975cc406dcee788fd22fc7bf7c97fb7ac6dff3580eda56cee2e"}
+publishing to ws://localhost:8888... success.
+[SUCCESS] Performance test completed: 5/5 successful responses
+[INFO] Test 7: Testing kind-specific NIP-42 authentication requirements
+[INFO] Generated test keypair for kind-specific tests: test_pubkey
+[INFO] Testing kind 1 event (regular note) - should work without authentication...
+2025-09-30 11:15:34 - Kind 1 event result: connecting to ws://localhost:8888... ok.
+{"kind":1,"id":"012690335e48736fd29769669d2bda15a079183c1d0f27b8400366a54b5b9ddd","pubkey":"ad362b9bbf61b140c5f677a2d091d622fef6fa186c579e6600dd8b24a85a2260","created_at":1759245334,"tags":[],"content":"Regular note - should not require auth","sig":"a3a0ce218666d2a374983a343bc24da5a727ce251c23828171021f15a3ab441a0c86f56200321467914ce4bee9a987f1de301151467ae639d7f941bac7fbe68e"}
+publishing to ws://localhost:8888... success.
+[SUCCESS] Kind 1 event accepted without authentication (correct behavior)
+[INFO] Testing kind 4 event (direct message) - should require authentication...
+2025-09-30 11:15:44 - Kind 4 event result: connecting to ws://localhost:8888... ok.
+{"kind":4,"id":"e629dd91320d48c1e3103ec16e40c707c2ee8143012c9ad8bb9d32f98610f447","pubkey":"ad362b9bbf61b140c5f677a2d091d622fef6fa186c579e6600dd8b24a85a2260","created_at":1759245334,"tags":[["p,test_pubkey"]],"content":"This is a direct message - should require auth","sig":"7677b3f2932fb4979bab3da6d241217b7ea2010411fc8bf5a51f6987f38696d5634f91a30b13e0f4861479ceabff995b3bb2eb2fc74af5f3d1175235d5448ce2"}
+publishing to ws://localhost:8888... 
+[SUCCESS] Kind 4 event requested authentication (correct behavior for DMs)
+[INFO] Testing kind 14 event (chat message) - should require authentication...
+2025-09-30 11:15:55 - Kind 14 event result: connecting to ws://localhost:8888... ok.
+{"kind":14,"id":"a5398c5851dd72a8980723c91d35345bd0088b800102180dd41af7056f1cad50","pubkey":"ad362b9bbf61b140c5f677a2d091d622fef6fa186c579e6600dd8b24a85a2260","created_at":1759245344,"tags":[["p,test_pubkey"]],"content":"Chat message - should require auth","sig":"62d43f3f81755d4ef81cbfc8aca9abc11f28b0c45640f19d3dd41a09bae746fe7a4e9d8e458c416dcd2cab02deb090ce1e29e8426d9be5445d130eaa00d339f2"}
+publishing to ws://localhost:8888... 
+[SUCCESS] Kind 14 event requested authentication (correct behavior for DMs)
+[INFO] Testing other event kinds - should work without authentication...
+2025-09-30 11:15:55 - Kind 0 event result: connecting to ws://localhost:8888... ok.
+{"kind":0,"id":"069ac4db07da3230681aa37ab9e6a2aa48e2c199245259681e45ffb2f1b21846","pubkey":"ad362b9bbf61b140c5f677a2d091d622fef6fa186c579e6600dd8b24a85a2260","created_at":1759245355,"tags":[],"content":"Test event kind 0 - should not require auth","sig":"3c99b97c0ea2d18bc88fc07b2e95e213b6a6af804512d62158f8fd63cc24a3937533b830f59d38ccacccf98ba2fb0ed7467b16271154d4dd37fbc075eba32e49"}
+publishing to ws://localhost:8888... success.
+[SUCCESS] Kind 0 event accepted without authentication (correct)
+2025-09-30 11:15:56 - Kind 3 event result: connecting to ws://localhost:8888... ok.
+{"kind":3,"id":"1dd1ccb13ebd0d50b2aa79dbb938b408a24f0a4dd9f872b717ed91ae6729051c","pubkey":"ad362b9bbf61b140c5f677a2d091d622fef6fa186c579e6600dd8b24a85a2260","created_at":1759245355,"tags":[],"content":"Test event kind 3 - should not require auth","sig":"c205cc76f687c3957cf8b35cd8346fd8c2e44d9ef82324b95a7eef7f57429fb6f2ab1d0263dd5d00204dd90e626d5918a8710341b0d68a5095b41455f49cf0dd"}
+publishing to ws://localhost:8888... success.
+[SUCCESS] Kind 3 event accepted without authentication (correct)
+2025-09-30 11:15:56 - Kind 7 event result: connecting to ws://localhost:8888... ok.
+{"kind":7,"id":"b6161b1da8a4d362e3c230df99c4f87b6311ef6e9f67e03a2476f8a6366352c1","pubkey":"ad362b9bbf61b140c5f677a2d091d622fef6fa186c579e6600dd8b24a85a2260","created_at":1759245356,"tags":[],"content":"Test event kind 7 - should not require auth","sig":"ab06c4b00a04d726109acd02d663e30188ff9ee854cf877e854fda90dd776a649ef3fab8ae5b530b4e6b5530490dd536a281a721e471bd3748a0dacc4eac9622"}
+publishing to ws://localhost:8888... success.
+[SUCCESS] Kind 7 event accepted without authentication (correct)
+[INFO] Kind-specific authentication test completed
+[INFO] === NIP-42 Test Results Summary ===
+[SUCCESS] Dependencies: PASS
+[SUCCESS] NIP-42 Support: PASS
+[SUCCESS] Auth Challenge: PASS
+[SUCCESS] Auth Flow: PASS
+[SUCCESS] WebSocket AUTH: PASS
+[SUCCESS] Configuration: PASS
+[SUCCESS] Performance: PASS
+[SUCCESS] Kind-Specific Auth: PASS
+[SUCCESS] All NIP-42 tests completed successfully!
+[SUCCESS] NIP-42 authentication implementation is working correctly
+[INFO] === NIP-42 Authentication Tests Complete ===

tests/white_black_test.sh

@@ -0,0 +1,244 @@
+#!/bin/bash
+
+# C-Relay Whitelist/Blacklist Test Script
+# Tests the relay's authentication functionality using nak
+
+set -e  # Exit on any error
+
+# Configuration
+RELAY_URL="ws://localhost:8888"
+ADMIN_PRIVKEY="aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa"
+ADMIN_PUBKEY="6a04ab98d9e4774ad806e302dddeb63bea16b5cb5f223ee77478e861bb583eb3"
+RELAY_PUBKEY="4f355bdcb7cc0af728ef3cceb9615d90684bb5b2ca5f859ab0f0b704075871aa"
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Logging functions
+log_info() {
+    echo -e "${BLUE}[INFO]${NC} $1"
+}
+
+log_success() {
+    echo -e "${GREEN}[SUCCESS]${NC} $1"
+}
+
+log_error() {
+    echo -e "${RED}[ERROR]${NC} $1"
+}
+
+log_warning() {
+    echo -e "${YELLOW}[WARNING]${NC} $1"
+}
+
+# Check if nak is installed
+check_nak() {
+    if ! command -v nak &> /dev/null; then
+        log_error "nak command not found. Please install nak first."
+        log_error "Visit: https://github.com/fiatjaf/nak"
+        exit 1
+    fi
+    log_success "nak is available"
+}
+
+# Generate test keypair
+generate_test_keypair() {
+    log_info "Generating test keypair..."
+
+    # Generate private key
+    TEST_PRIVKEY=$(nak key generate 2>/dev/null)
+
+    if [ -z "$TEST_PRIVKEY" ]; then
+        log_error "Failed to generate private key"
+        exit 1
+    fi
+
+    # Derive public key from private key
+    TEST_PUBKEY=$(nak key public "$TEST_PRIVKEY" 2>/dev/null)
+
+    if [ -z "$TEST_PUBKEY" ]; then
+        log_error "Failed to derive public key from private key"
+        exit 1
+    fi
+
+    log_success "Generated test keypair:"
+    log_info "  Private key: $TEST_PRIVKEY"
+    log_info "  Public key:  $TEST_PUBKEY"
+}
+
+# Create test event
+create_test_event() {
+    local timestamp=$(date +%s)
+    local content="Test event at timestamp $timestamp"
+
+    log_info "Creating test event (kind 1) with content: '$content'"
+
+    # Create event using nak
+    EVENT_JSON=$(nak event \
+        --kind 1 \
+        --content "$content" \
+        --sec "$TEST_PRIVKEY" \
+        --tag 't=test')
+
+    # Extract event ID
+    EVENT_ID=$(echo "$EVENT_JSON" | jq -r '.id')
+
+    if [ -z "$EVENT_ID" ] || [ "$EVENT_ID" = "null" ]; then
+        log_error "Failed to create test event"
+        exit 1
+    fi
+
+    log_success "Created test event with ID: $EVENT_ID"
+}
+
+# Test 1: Post event and verify retrieval
+test_post_and_retrieve() {
+    log_info "=== TEST 1: Post event and verify retrieval ==="
+
+    # Post the event
+    log_info "Posting test event to relay..."
+    POST_RESULT=$(echo "$EVENT_JSON" | nak event "$RELAY_URL")
+
+    if echo "$POST_RESULT" | grep -q "error\|failed\|denied"; then
+        log_error "Failed to post event: $POST_RESULT"
+        return 1
+    fi
+
+    log_success "Event posted successfully"
+
+    # Wait a moment for processing
+    sleep 2
+
+    # Try to retrieve the event
+    log_info "Retrieving event from relay..."
+    RETRIEVE_RESULT=$(nak req \
+        --id "$EVENT_ID" \
+        "$RELAY_URL")
+
+    if echo "$RETRIEVE_RESULT" | grep -q "$EVENT_ID"; then
+        log_success "Event successfully retrieved from relay"
+        return 0
+    else
+        log_error "Failed to retrieve event from relay"
+        log_error "Query result: $RETRIEVE_RESULT"
+        return 1
+    fi
+}
+
+# Send admin command to add user to blacklist
+add_to_blacklist() {
+    log_info "Adding test user to blacklist..."
+
+    # Create the admin command
+    COMMAND="[\"blacklist\", \"pubkey\", \"$TEST_PUBKEY\"]"
+
+    # Encrypt the command using NIP-44
+    ENCRYPTED_COMMAND=$(nak encrypt "$COMMAND" \
+        --sec "$ADMIN_PRIVKEY" \
+        --recipient-pubkey "$RELAY_PUBKEY")
+
+    if [ -z "$ENCRYPTED_COMMAND" ]; then
+        log_error "Failed to encrypt admin command"
+        return 1
+    fi
+
+    # Create admin event
+    ADMIN_EVENT=$(nak event \
+        --kind 23456 \
+        --content "$ENCRYPTED_COMMAND" \
+        --sec "$ADMIN_PRIVKEY" \
+        --tag "p=$RELAY_PUBKEY")
+
+    # Post admin event
+    ADMIN_RESULT=$(echo "$ADMIN_EVENT" | nak event "$RELAY_URL")
+
+    if echo "$ADMIN_RESULT" | grep -q "error\|failed\|denied"; then
+        log_error "Failed to send admin command: $ADMIN_RESULT"
+        return 1
+    fi
+
+    log_success "Admin command sent successfully - user added to blacklist"
+    # Wait for the relay to process the admin command
+    sleep 3
+}
+
+# Test 2: Try to post after blacklisting
+test_blacklist_post() {
+    log_info "=== TEST 2: Attempt to post event after blacklisting ==="
+
+    # Create a new test event
+    local timestamp=$(date +%s)
+    local content="Blacklisted test event at timestamp $timestamp"
+
+    log_info "Creating new test event for blacklisted user..."
+
+    NEW_EVENT_JSON=$(nak event \
+        --kind 1 \
+        --content "$content" \
+        --sec "$TEST_PRIVKEY" \
+        --tag 't=blacklist-test')
+
+    NEW_EVENT_ID=$(echo "$NEW_EVENT_JSON" | jq -r '.id')
+
+    # Try to post the event
+    log_info "Attempting to post event with blacklisted user..."
+    POST_RESULT=$(echo "$NEW_EVENT_JSON" | nak event "$RELAY_URL" 2>&1)
+
+    # Check if posting failed (should fail for blacklisted user)
+    if echo "$POST_RESULT" | grep -q "error\|failed\|denied\|blocked"; then
+        log_success "Event posting correctly blocked for blacklisted user"
+        return 0
+    else
+        log_error "Event posting was not blocked - blacklist may not be working"
+        log_error "Post result: $POST_RESULT"
+        return 1
+    fi
+}
+
+# Main test function
+main() {
+    log_info "Starting C-Relay Whitelist/Blacklist Test"
+    log_info "=========================================="
+
+    # Check prerequisites
+    check_nak
+
+    # Generate test keypair
+    generate_test_keypair
+
+    # Create test event
+    create_test_event
+
+    # Test 1: Post and retrieve
+    if test_post_and_retrieve; then
+        log_success "TEST 1 PASSED: Event posting and retrieval works"
+    else
+        log_error "TEST 1 FAILED: Event posting/retrieval failed"
+        exit 1
+    fi
+
+    # Add user to blacklist
+    if add_to_blacklist; then
+        log_success "Blacklist command sent successfully"
+    else
+        log_error "Failed to send blacklist command"
+        exit 1
+    fi
+
+    # Test 2: Try posting after blacklist
+    if test_blacklist_post; then
+        log_success "TEST 2 PASSED: Blacklist functionality works correctly"
+    else
+        log_error "TEST 2 FAILED: Blacklist functionality not working"
+        exit 1
+    fi
+
+    log_success "All tests passed! Whitelist/blacklist functionality is working correctly."
+}
+
+# Run main function
+main "$@"