0.13.0

- Renamed RondevuService to Rondevu as single main entrypoint
- Integrated signaling methods directly into Rondevu class
- Updated service FQN format: service:version@username (colon instead of @)
- Added service discovery (direct, random, paginated)
- Removed high-level abstractions (ServiceHost, ServiceClient, RTCDurableConnection, EventBus, WebRTCContext, Bin)
- Updated RondevuAPI with new endpoint methods (offer-specific routes)
- Simplified types (moved Binnable to types.ts, removed connection types)
- Updated RondevuSignaler to use Rondevu class
- Breaking changes: Complete API overhaul for simplicity

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

.prettierrc.json

@@ -0,0 +1,9 @@
+{
+    "semi": false,
+    "singleQuote": true,
+    "tabWidth": 4,
+    "useTabs": false,
+    "trailingComma": "es5",
+    "printWidth": 100,
+    "arrowParens": "avoid"
+}

README.md

@@ -2,9 +2,9 @@
 
 [![npm version](https://img.shields.io/npm/v/@xtr-dev/rondevu-client)](https://www.npmjs.com/package/@xtr-dev/rondevu-client)
 
-🌐 **WebRTC with durable connections and automatic reconnection**
+🌐 **Simple, high-level WebRTC peer-to-peer connections**
 
-TypeScript/JavaScript client for Rondevu, providing durable WebRTC connections that survive network interruptions with automatic reconnection and message queuing.
+TypeScript/JavaScript client for Rondevu, providing easy-to-use WebRTC connections with automatic signaling, username-based discovery, and built-in reconnection support.
 
 **Related repositories:**
 - [@xtr-dev/rondevu-client](https://github.com/xtr-dev/rondevu-client) - TypeScript client library ([npm](https://www.npmjs.com/package/@xtr-dev/rondevu-client))
@@ -15,14 +15,16 @@ TypeScript/JavaScript client for Rondevu, providing durable WebRTC connections t
 
 ## Features
 
-- **Durable Connections**: Automatic reconnection on network drops
-- **Message Queuing**: Messages sent during disconnections are queued and flushed on reconnect
-- **Durable Channels**: RTCDataChannel wrappers that survive connection drops
-- **TTL Auto-Refresh**: Services automatically republish before expiration
-- **Username Claiming**: Cryptographic ownership with Ed25519 signatures
-- **Service Publishing**: Package-style naming (com.example.chat@1.0.0)
+- **High-Level Wrappers**: ServiceHost and ServiceClient eliminate WebRTC boilerplate
+- **Username-Based Discovery**: Connect to peers by username, not complex offer/answer exchange
+- **Semver-Compatible Matching**: Requesting chat@1.0.0 matches any compatible 1.x.x version
+- **Privacy-First Design**: Services are hidden by default - no enumeration possible
+- **Automatic Reconnection**: Built-in retry logic with exponential backoff
+- **Message Queuing**: Messages sent while disconnected are queued and flushed on reconnect
+- **Cryptographic Username Claiming**: Secure ownership with Ed25519 signatures
+- **Service Publishing**: Package-style naming (chat.app@1.0.0) with multiple simultaneous offers
 - **TypeScript**: Full type safety and autocomplete
-- **Configurable**: All timeouts, retry limits, and queue sizes are configurable
+- **Configurable Polling**: Exponential backoff with jitter to reduce server load
 
 ## Install
 
@@ -32,588 +34,400 @@ npm install @xtr-dev/rondevu-client
 
 ## Quick Start
 
-### Publishing a Service (Alice)
+### Hosting a Service (Alice)
 
 ```typescript
-import { Rondevu } from '@xtr-dev/rondevu-client';
+import { RondevuService, ServiceHost } from '@xtr-dev/rondevu-client'
 
-// Initialize client and register
-const client = new Rondevu({ baseUrl: 'https://api.ronde.vu' });
-await client.register();
+// Step 1: Create and initialize service
+const service = new RondevuService({
+    apiUrl: 'https://api.ronde.vu',
+    username: 'alice'
+})
 
-// Step 1: Claim username (one-time)
-const claim = await client.usernames.claimUsername('alice');
-client.usernames.saveKeypairToStorage('alice', claim.publicKey, claim.privateKey);
+await service.initialize()  // Generates keypair
+await service.claimUsername()  // Claims username with signature
 
-// Step 2: Expose service with handler
-const keypair = client.usernames.loadKeypairFromStorage('alice');
+// Step 2: Create ServiceHost
+const host = new ServiceHost({
+    service: 'chat.app@1.0.0',
+    rondevuService: service,
+    maxPeers: 5,  // Accept up to 5 connections
+    ttl: 300000   // 5 minutes
+})
 
-const service = await client.exposeService({
-  username: 'alice',
-  privateKey: keypair.privateKey,
-  serviceFqn: 'chat@1.0.0',
-  isPublic: true,
-  poolSize: 10,  // Handle 10 concurrent connections
-  handler: (channel, connectionId) => {
-    console.log(`📡 New connection: ${connectionId}`);
+// Step 3: Listen for incoming connections
+host.events.on('connection', (connection) => {
+    console.log('✅ New connection!')
 
-    channel.on('message', (data) => {
-      console.log('📥 Received:', data);
-      channel.send(`Echo: ${data}`);
-    });
+    connection.events.on('message', (msg) => {
+        console.log('📨 Received:', msg)
+        connection.sendMessage('Hello from Alice!')
+    })
 
-    channel.on('close', () => {
-      console.log(`👋 Connection ${connectionId} closed`);
-    });
-  }
-});
+    connection.events.on('state-change', (state) => {
+        console.log('Connection state:', state)
+    })
+})
 
-// Start the service
-const info = await service.start();
-console.log(`Service published with UUID: ${info.uuid}`);
-console.log('Waiting for connections...');
+host.events.on('error', (error) => {
+    console.error('Host error:', error)
+})
 
-// Later: stop the service
-await service.stop();
+// Step 4: Start hosting
+await host.start()
+console.log('Service is now live! Others can connect to @alice')
+
+// Later: stop hosting
+host.dispose()
 ```
 
 ### Connecting to a Service (Bob)
 
 ```typescript
-import { Rondevu } from '@xtr-dev/rondevu-client';
+import { RondevuService, ServiceClient } from '@xtr-dev/rondevu-client'
 
-// Initialize client and register
-const client = new Rondevu({ baseUrl: 'https://api.ronde.vu' });
-await client.register();
+// Step 1: Create and initialize service
+const service = new RondevuService({
+    apiUrl: 'https://api.ronde.vu',
+    username: 'bob'
+})
 
-// Connect to Alice's service
-const connection = await client.connect('alice', 'chat@1.0.0', {
-  maxReconnectAttempts: 5
-});
+await service.initialize()
+await service.claimUsername()
 
-// Create a durable channel
-const channel = connection.createChannel('main');
+// Step 2: Create ServiceClient
+const client = new ServiceClient({
+    username: 'alice',  // Connect to Alice
+    serviceFqn: 'chat.app@1.0.0',
+    rondevuService: service,
+    autoReconnect: true,
+    maxReconnectAttempts: 5
+})
 
-channel.on('message', (data) => {
-  console.log('📥 Received:', data);
-});
+// Step 3: Listen for connection events
+client.events.on('connected', (connection) => {
+    console.log('✅ Connected to Alice!')
 
-channel.on('open', () => {
-  console.log('✅ Channel open');
-  channel.send('Hello Alice!');
-});
+    connection.events.on('message', (msg) => {
+        console.log('📨 Received:', msg)
+    })
 
-// Listen for connection events
-connection.on('connected', () => {
-  console.log('🎉 Connected to Alice');
-});
+    // Send a message
+    connection.sendMessage('Hello from Bob!')
+})
 
-connection.on('reconnecting', (attempt, max, delay) => {
-  console.log(`🔄 Reconnecting... (${attempt}/${max}, retry in ${delay}ms)`);
-});
+client.events.on('disconnected', () => {
+    console.log('🔌 Disconnected')
+})
 
-connection.on('disconnected', () => {
-  console.log('🔌 Disconnected');
-});
+client.events.on('reconnecting', ({ attempt, maxAttempts }) => {
+    console.log(`🔄 Reconnecting (${attempt}/${maxAttempts})...`)
+})
 
-connection.on('failed', (error) => {
-  console.error('❌ Connection failed permanently:', error);
-});
+client.events.on('error', (error) => {
+    console.error('❌ Error:', error)
+})
 
-// Establish the connection
-await connection.connect();
+// Step 4: Connect
+await client.connect()
 
-// Messages sent during disconnection are automatically queued
-channel.send('This will be queued if disconnected');
-
-// Later: close the connection
-await connection.close();
+// Later: disconnect
+client.dispose()
 ```
 
 ## Core Concepts
 
-### DurableConnection
+### RondevuService
 
-Manages WebRTC peer lifecycle with automatic reconnection:
-- Automatically reconnects when connection drops
-- Exponential backoff with jitter (1s → 2s → 4s → 8s → ... max 30s)
-- Configurable max retry attempts (default: 10)
-- Manages multiple DurableChannel instances
+Handles authentication and username management:
+- Generates Ed25519 keypair for signing
+- Claims usernames with cryptographic proof
+- Provides API client for signaling server
 
-### DurableChannel
+### ServiceHost
 
-Wraps RTCDataChannel with message queuing:
-- Queues messages during disconnection
-- Flushes queue on reconnection
-- Configurable queue size and message age limits
-- RTCDataChannel-compatible API with event emitters
+High-level wrapper for hosting a WebRTC service:
+- Automatically creates and publishes offers
+- Handles incoming connections
+- Manages ICE candidate exchange
+- Supports multiple simultaneous peers
 
-### DurableService
+### ServiceClient
 
-Server-side service with TTL auto-refresh:
-- Automatically republishes service before TTL expires
-- Creates DurableConnection for each incoming peer
-- Manages connection pool for multiple simultaneous connections
+High-level wrapper for connecting to services:
+- Discovers services by username
+- Handles offer/answer exchange automatically
+- Built-in auto-reconnection with exponential backoff
+- Event-driven API
+
+### RTCDurableConnection
+
+Low-level connection wrapper (used internally):
+- Manages WebRTC PeerConnection lifecycle
+- Handles ICE candidate polling
+- Provides message queue for reliability
+- State management and events
 
 ## API Reference
 
-### Main Client
+### RondevuService
 
 ```typescript
-const client = new Rondevu({
-  baseUrl: 'https://api.ronde.vu',  // optional, default shown
-  credentials?: { peerId, secret },  // optional, skip registration
-  fetch?: customFetch,               // optional, for Node.js < 18
-  RTCPeerConnection?: RTCPeerConnection,  // optional, for Node.js
-  RTCSessionDescription?: RTCSessionDescription,
-  RTCIceCandidate?: RTCIceCandidate
-});
+const service = new RondevuService({
+    apiUrl: string,           // Signaling server URL
+    username: string,         // Your username
+    keypair?: Keypair         // Optional: reuse existing keypair
+})
 
-// Register and get credentials
-const creds = await client.register();
-// { peerId: '...', secret: '...' }
+// Initialize service (generates keypair if not provided)
+await service.initialize(): Promise<void>
 
-// Check if authenticated
-client.isAuthenticated(); // boolean
+// Claim username with cryptographic signature
+await service.claimUsername(): Promise<void>
 
-// Get current credentials
-client.getCredentials(); // { peerId, secret } | undefined
+// Check if username is claimed
+service.isUsernameClaimed(): boolean
+
+// Get current username
+service.getUsername(): string
+
+// Get keypair
+service.getKeypair(): Keypair
+
+// Get API client
+service.getAPI(): RondevuAPI
 ```
 
-### Username API
+### ServiceHost
 
 ```typescript
-// Check username availability
-const check = await client.usernames.checkUsername('alice');
-// { available: true } or { available: false, expiresAt: number, publicKey: string }
+const host = new ServiceHost({
+    service: string,              // Service FQN (e.g., 'chat.app@1.0.0')
+    rondevuService: RondevuService,
+    maxPeers?: number,            // Default: 5
+    ttl?: number,                 // Default: 300000 (5 minutes)
+    isPublic?: boolean,           // Default: true
+    rtcConfiguration?: RTCConfiguration
+})
 
-// Claim username with new keypair
-const claim = await client.usernames.claimUsername('alice');
-// { username, publicKey, privateKey, claimedAt, expiresAt }
+// Start hosting
+await host.start(): Promise<void>
 
-// Save keypair to localStorage
-client.usernames.saveKeypairToStorage('alice', claim.publicKey, claim.privateKey);
+// Stop hosting and cleanup
+host.dispose(): void
 
-// Load keypair from localStorage
-const keypair = client.usernames.loadKeypairFromStorage('alice');
-// { publicKey, privateKey } | null
+// Get all active connections
+host.getConnections(): RTCDurableConnection[]
+
+// Events
+host.events.on('connection', (conn: RTCDurableConnection) => {})
+host.events.on('error', (error: Error) => {})
 ```
 
-**Username Rules:**
-- Format: Lowercase alphanumeric + dash (`a-z`, `0-9`, `-`)
-- Length: 3-32 characters
-- Pattern: `^[a-z0-9][a-z0-9-]*[a-z0-9]$`
-- Validity: 365 days from claim/last use
-- Ownership: Secured by Ed25519 public key
-
-### Durable Service API
+### ServiceClient
 
 ```typescript
-// Expose a durable service
-const service = await client.exposeService({
-  username: 'alice',
-  privateKey: keypair.privateKey,
-  serviceFqn: 'chat@1.0.0',
+const client = new ServiceClient({
+    username: string,             // Host username to connect to
+    serviceFqn: string,          // Service FQN (e.g., 'chat.app@1.0.0')
+    rondevuService: RondevuService,
+    autoReconnect?: boolean,     // Default: true
+    maxReconnectAttempts?: number, // Default: 5
+    rtcConfiguration?: RTCConfiguration
+})
 
-  // Service options
-  isPublic: true,               // optional, default: false
-  metadata: { version: '1.0' }, // optional
-  ttl: 300000,                  // optional, default: 5 minutes
-  ttlRefreshMargin: 0.2,        // optional, refresh at 80% of TTL
+// Connect to service
+await client.connect(): Promise<RTCDurableConnection>
 
-  // Connection pooling
-  poolSize: 10,                 // optional, default: 1
-  pollingInterval: 2000,        // optional, default: 2000ms
+// Disconnect and cleanup
+client.dispose(): void
 
-  // Connection options (applied to incoming connections)
-  maxReconnectAttempts: 10,     // optional, default: 10
-  reconnectBackoffBase: 1000,   // optional, default: 1000ms
-  reconnectBackoffMax: 30000,   // optional, default: 30000ms
-  reconnectJitter: 0.2,         // optional, default: 0.2 (±20%)
-  connectionTimeout: 30000,     // optional, default: 30000ms
+// Get current connection
+client.getConnection(): RTCDurableConnection | null
 
-  // Message queuing
-  maxQueueSize: 1000,           // optional, default: 1000
-  maxMessageAge: 60000,         // optional, default: 60000ms (1 minute)
-
-  // WebRTC configuration
-  rtcConfig: {
-    iceServers: [
-      { urls: 'stun:stun.l.google.com:19302' }
-    ]
-  },
-
-  // Connection handler
-  handler: (channel, connectionId) => {
-    // Handle incoming connection
-    channel.on('message', (data) => {
-      console.log('Received:', data);
-      channel.send(`Echo: ${data}`);
-    });
-  }
-});
-
-// Start the service
-const info = await service.start();
-// { serviceId: '...', uuid: '...', expiresAt: 1234567890 }
-
-// Get active connections
-const connections = service.getActiveConnections();
-// ['conn-123', 'conn-456']
-
-// Get service info
-const serviceInfo = service.getServiceInfo();
-// { serviceId: '...', uuid: '...', expiresAt: 1234567890 } | null
-
-// Stop the service
-await service.stop();
+// Events
+client.events.on('connected', (conn: RTCDurableConnection) => {})
+client.events.on('disconnected', () => {})
+client.events.on('reconnecting', (info: { attempt: number, maxAttempts: number }) => {})
+client.events.on('error', (error: Error) => {})
 ```
 
-**Service Events:**
+### RTCDurableConnection
+
 ```typescript
-service.on('published', (serviceId, uuid) => {
-  console.log(`Service published: ${uuid}`);
-});
+// Connection state
+connection.state: 'connected' | 'connecting' | 'disconnected'
 
-service.on('connection', (connectionId) => {
-  console.log(`New connection: ${connectionId}`);
-});
+// Send message (returns true if sent, false if queued)
+await connection.sendMessage(message: string): Promise<boolean>
 
-service.on('disconnection', (connectionId) => {
-  console.log(`Connection closed: ${connectionId}`);
-});
+// Queue message for sending when connected
+await connection.queueMessage(message: string, options?: QueueMessageOptions): Promise<void>
 
-service.on('ttl-refreshed', (expiresAt) => {
-  console.log(`TTL refreshed, expires at: ${new Date(expiresAt)}`);
-});
+// Disconnect
+connection.disconnect(): void
 
-service.on('error', (error, context) => {
-  console.error(`Service error (${context}):`, error);
-});
-
-service.on('closed', () => {
-  console.log('Service stopped');
-});
+// Events
+connection.events.on('message', (msg: string) => {})
+connection.events.on('state-change', (state: ConnectionStates) => {})
 ```
 
-### Durable Connection API
+## Configuration
+
+### Polling Configuration
+
+The signaling uses configurable polling with exponential backoff:
 
 ```typescript
-// Connect by username and service FQN
-const connection = await client.connect('alice', 'chat@1.0.0', {
-  // Connection options
-  maxReconnectAttempts: 10,     // optional, default: 10
-  reconnectBackoffBase: 1000,   // optional, default: 1000ms
-  reconnectBackoffMax: 30000,   // optional, default: 30000ms
-  reconnectJitter: 0.2,         // optional, default: 0.2 (±20%)
-  connectionTimeout: 30000,     // optional, default: 30000ms
-
-  // Message queuing
-  maxQueueSize: 1000,           // optional, default: 1000
-  maxMessageAge: 60000,         // optional, default: 60000ms
-
-  // WebRTC configuration
-  rtcConfig: {
-    iceServers: [
-      { urls: 'stun:stun.l.google.com:19302' }
-    ]
-  }
-});
-
-// Connect by UUID
-const connection2 = await client.connectByUuid('service-uuid-here', {
-  maxReconnectAttempts: 5
-});
-
-// Create channels before connecting
-const channel = connection.createChannel('main');
-const fileChannel = connection.createChannel('files', {
-  ordered: false,
-  maxRetransmits: 3
-});
-
-// Get existing channel
-const existingChannel = connection.getChannel('main');
-
-// Check connection state
-const state = connection.getState();
-// 'connecting' | 'connected' | 'reconnecting' | 'disconnected' | 'failed' | 'closed'
-
-const isConnected = connection.isConnected();
-
-// Connect
-await connection.connect();
-
-// Close connection
-await connection.close();
-```
-
-**Connection Events:**
-```typescript
-connection.on('state', (newState, previousState) => {
-  console.log(`State: ${previousState} → ${newState}`);
-});
-
-connection.on('connected', () => {
-  console.log('Connected');
-});
-
-connection.on('reconnecting', (attempt, maxAttempts, delay) => {
-  console.log(`Reconnecting (${attempt}/${maxAttempts}) in ${delay}ms`);
-});
-
-connection.on('disconnected', () => {
-  console.log('Disconnected');
-});
-
-connection.on('failed', (error, permanent) => {
-  console.error('Connection failed:', error, 'Permanent:', permanent);
-});
-
-connection.on('closed', () => {
-  console.log('Connection closed');
-});
-```
-
-### Durable Channel API
-
-```typescript
-const channel = connection.createChannel('chat', {
-  ordered: true,          // optional, default: true
-  maxRetransmits: undefined  // optional, for unordered channels
-});
-
-// Send data (queued if disconnected)
-channel.send('Hello!');
-channel.send(new ArrayBuffer(1024));
-channel.send(new Blob(['data']));
-
-// Check state
-const state = channel.readyState;
-// 'connecting' | 'open' | 'closing' | 'closed'
-
-// Get buffered amount
-const buffered = channel.bufferedAmount;
-
-// Set buffered amount low threshold
-channel.bufferedAmountLowThreshold = 16 * 1024; // 16KB
-
-// Get queue size (for debugging)
-const queueSize = channel.getQueueSize();
-
-// Close channel
-channel.close();
-```
-
-**Channel Events:**
-```typescript
-channel.on('open', () => {
-  console.log('Channel open');
-});
-
-channel.on('message', (data) => {
-  console.log('Received:', data);
-});
-
-channel.on('error', (error) => {
-  console.error('Channel error:', error);
-});
-
-channel.on('close', () => {
-  console.log('Channel closed');
-});
-
-channel.on('bufferedAmountLow', () => {
-  console.log('Buffer drained, safe to send more');
-});
-
-channel.on('queueOverflow', (droppedCount) => {
-  console.warn(`Queue overflow: ${droppedCount} messages dropped`);
-});
-```
-
-## Configuration Options
-
-### Connection Configuration
-
-```typescript
-interface DurableConnectionConfig {
-  maxReconnectAttempts?: number;      // default: 10
-  reconnectBackoffBase?: number;      // default: 1000 (1 second)
-  reconnectBackoffMax?: number;       // default: 30000 (30 seconds)
-  reconnectJitter?: number;           // default: 0.2 (±20%)
-  connectionTimeout?: number;         // default: 30000 (30 seconds)
-  maxQueueSize?: number;              // default: 1000 messages
-  maxMessageAge?: number;             // default: 60000 (1 minute)
-  rtcConfig?: RTCConfiguration;
+// Default polling config
+{
+    initialInterval: 500,      // Start at 500ms
+    maxInterval: 5000,         // Max 5 seconds
+    backoffMultiplier: 1.5,    // Increase by 1.5x each time
+    maxRetries: 50,            // Max 50 attempts
+    jitter: true               // Add random 0-100ms to prevent thundering herd
 }
 ```
 
-### Service Configuration
+This is handled automatically - no configuration needed.
+
+### WebRTC Configuration
+
+Provide custom STUN/TURN servers:
 
 ```typescript
-interface DurableServiceConfig extends DurableConnectionConfig {
-  username: string;
-  privateKey: string;
-  serviceFqn: string;
-  isPublic?: boolean;                 // default: false
-  metadata?: Record<string, any>;
-  ttl?: number;                       // default: 300000 (5 minutes)
-  ttlRefreshMargin?: number;          // default: 0.2 (refresh at 80%)
-  poolSize?: number;                  // default: 1
-  pollingInterval?: number;           // default: 2000 (2 seconds)
-}
+const host = new ServiceHost({
+    service: 'chat.app@1.0.0',
+    rondevuService: service,
+    rtcConfiguration: {
+        iceServers: [
+            { urls: 'stun:stun.l.google.com:19302' },
+            {
+                urls: 'turn:turn.example.com:3478',
+                username: 'user',
+                credential: 'pass'
+            }
+        ]
+    }
+})
 ```
 
+## Username Rules
+
+- **Format**: Lowercase alphanumeric + dash (`a-z`, `0-9`, `-`)
+- **Length**: 3-32 characters
+- **Pattern**: `^[a-z0-9][a-z0-9-]*[a-z0-9]$`
+- **Validity**: 365 days from claim/last use
+- **Ownership**: Secured by Ed25519 public key signature
+
 ## Examples
 
 ### Chat Application
 
-```typescript
-// Server
-const client = new Rondevu();
-await client.register();
+See [demo/demo.js](./demo/demo.js) for a complete working example.
 
-const claim = await client.usernames.claimUsername('alice');
-client.usernames.saveKeypairToStorage('alice', claim.publicKey, claim.privateKey);
-const keypair = client.usernames.loadKeypairFromStorage('alice');
-
-const service = await client.exposeService({
-  username: 'alice',
-  privateKey: keypair.privateKey,
-  serviceFqn: 'chat@1.0.0',
-  isPublic: true,
-  poolSize: 50,  // Handle 50 concurrent users
-  handler: (channel, connectionId) => {
-    console.log(`User ${connectionId} joined`);
-
-    channel.on('message', (data) => {
-      console.log(`[${connectionId}]: ${data}`);
-      // Broadcast to all users (implement your broadcast logic)
-    });
-
-    channel.on('close', () => {
-      console.log(`User ${connectionId} left`);
-    });
-  }
-});
-
-await service.start();
-
-// Client
-const client2 = new Rondevu();
-await client2.register();
-
-const connection = await client2.connect('alice', 'chat@1.0.0');
-const channel = connection.createChannel('chat');
-
-channel.on('message', (data) => {
-  console.log('Message:', data);
-});
-
-await connection.connect();
-channel.send('Hello everyone!');
-```
-
-### File Transfer with Progress
+### Persistent Keypair
 
 ```typescript
-// Server
-const service = await client.exposeService({
-  username: 'alice',
-  privateKey: keypair.privateKey,
-  serviceFqn: 'files@1.0.0',
-  handler: (channel, connectionId) => {
-    channel.on('message', async (data) => {
-      const request = JSON.parse(data);
+// Save keypair to localStorage
+const service = new RondevuService({
+    apiUrl: 'https://api.ronde.vu',
+    username: 'alice'
+})
 
-      if (request.action === 'download') {
-        const file = await fs.readFile(request.path);
-        const chunkSize = 16 * 1024; // 16KB chunks
+await service.initialize()
+await service.claimUsername()
 
-        for (let i = 0; i < file.byteLength; i += chunkSize) {
-          const chunk = file.slice(i, i + chunkSize);
-          channel.send(chunk);
+// Save for later
+localStorage.setItem('rondevu-keypair', JSON.stringify(service.getKeypair()))
+localStorage.setItem('rondevu-username', service.getUsername())
 
-          // Wait for buffer to drain if needed
-          while (channel.bufferedAmount > 16 * 1024 * 1024) { // 16MB
-            await new Promise(resolve => setTimeout(resolve, 100));
-          }
-        }
+// Load on next session
+const savedKeypair = JSON.parse(localStorage.getItem('rondevu-keypair'))
+const savedUsername = localStorage.getItem('rondevu-username')
 
-        channel.send(JSON.stringify({ done: true }));
-      }
-    });
-  }
-});
+const service2 = new RondevuService({
+    apiUrl: 'https://api.ronde.vu',
+    username: savedUsername,
+    keypair: savedKeypair
+})
 
-await service.start();
-
-// Client
-const connection = await client.connect('alice', 'files@1.0.0');
-const channel = connection.createChannel('files');
-
-const chunks = [];
-channel.on('message', (data) => {
-  if (typeof data === 'string') {
-    const msg = JSON.parse(data);
-    if (msg.done) {
-      const blob = new Blob(chunks);
-      console.log('Download complete:', blob.size, 'bytes');
-    }
-  } else {
-    chunks.push(data);
-    console.log('Progress:', chunks.length * 16 * 1024, 'bytes');
-  }
-});
-
-await connection.connect();
-channel.send(JSON.stringify({ action: 'download', path: '/file.zip' }));
+await service2.initialize()  // Reuses keypair
 ```
 
-## Platform-Specific Setup
+### Message Queue Example
+
+```typescript
+// Messages are automatically queued if not connected yet
+client.events.on('connected', (connection) => {
+    // Send immediately
+    connection.sendMessage('Hello!')
+})
+
+// Or queue for later
+await client.connect()
+const conn = client.getConnection()
+await conn.queueMessage('This will be sent when connected', {
+    expiresAt: Date.now() + 60000  // Expire after 1 minute
+})
+```
+
+## Migration from v0.9.x
+
+v0.11.0+ introduces high-level wrappers, RESTful API changes, and semver-compatible discovery:
+
+**API Changes:**
+- Server endpoints restructured (`/usernames/*` → `/users/*`)
+- Added `ServiceHost` and `ServiceClient` wrappers
+- Message queue fully implemented
+- Configurable polling with exponential backoff
+- Removed deprecated `cleanup()` methods (use `dispose()`)
+- **v0.11.0+**: Services use `offers` array instead of single `sdp`
+- **v0.11.0+**: Semver-compatible service discovery (chat@1.0.0 matches 1.x.x)
+- **v0.11.0+**: All services are hidden - no listing endpoint
+- **v0.11.0+**: Services support multiple simultaneous offers for connection pooling
+
+**Migration Guide:**
+
+```typescript
+// Before (v0.9.x) - Manual WebRTC setup
+const signaler = new RondevuSignaler(service, 'chat@1.0.0')
+const context = new WebRTCContext()
+const pc = context.createPeerConnection()
+// ... 50+ lines of boilerplate
+
+// After (v0.11.0) - ServiceHost wrapper
+const host = new ServiceHost({
+    service: 'chat@1.0.0',
+    rondevuService: service
+})
+await host.start()
+// Done!
+```
+
+## Platform Support
 
 ### Modern Browsers
 Works out of the box - no additional setup needed.
 
 ### Node.js 18+
-Native fetch is available, but you need WebRTC polyfills:
+Native fetch is available, but WebRTC requires polyfills:
 
 ```bash
 npm install wrtc
 ```
 
 ```typescript
-import { Rondevu } from '@xtr-dev/rondevu-client';
-import { RTCPeerConnection, RTCSessionDescription, RTCIceCandidate } from 'wrtc';
+import { WebRTCContext } from '@xtr-dev/rondevu-client'
+import { RTCPeerConnection, RTCSessionDescription, RTCIceCandidate } from 'wrtc'
 
-const client = new Rondevu({
-  baseUrl: 'https://api.ronde.vu',
-  RTCPeerConnection,
-  RTCSessionDescription,
-  RTCIceCandidate
-});
-```
-
-### Node.js < 18
-Install both fetch and WebRTC polyfills:
-
-```bash
-npm install node-fetch wrtc
-```
-
-```typescript
-import { Rondevu } from '@xtr-dev/rondevu-client';
-import fetch from 'node-fetch';
-import { RTCPeerConnection, RTCSessionDescription, RTCIceCandidate } from 'wrtc';
-
-const client = new Rondevu({
-  baseUrl: 'https://api.ronde.vu',
-  fetch: fetch as any,
-  RTCPeerConnection,
-  RTCSessionDescription,
-  RTCIceCandidate
-});
+// Configure WebRTC context
+const context = new WebRTCContext({
+    RTCPeerConnection,
+    RTCSessionDescription,
+    RTCIceCandidate
+} as any)
 ```
 
 ## TypeScript
@@ -622,38 +436,23 @@ All types are exported:
 
 ```typescript
 import type {
-  // Client types
-  Credentials,
-  RondevuOptions,
-
-  // Username types
-  UsernameCheckResult,
-  UsernameClaimResult,
-
-  // Durable connection types
-  DurableConnectionState,
-  DurableChannelState,
-  DurableConnectionConfig,
-  DurableChannelConfig,
-  DurableServiceConfig,
-  QueuedMessage,
-  DurableConnectionEvents,
-  DurableChannelEvents,
-  DurableServiceEvents,
-  ConnectionInfo,
-  ServiceInfo
-} from '@xtr-dev/rondevu-client';
+    RondevuServiceOptions,
+    ServiceHostOptions,
+    ServiceHostEvents,
+    ServiceClientOptions,
+    ServiceClientEvents,
+    ConnectionInterface,
+    ConnectionEvents,
+    ConnectionStates,
+    Message,
+    QueueMessageOptions,
+    Signaler,
+    PollingConfig,
+    Credentials,
+    Keypair
+} from '@xtr-dev/rondevu-client'
 ```
 
-## Migration from v0.8.x
-
-v0.9.0 is a **breaking change** that replaces the low-level APIs with high-level durable connections. See [MIGRATION.md](./MIGRATION.md) for detailed migration guide.
-
-**Key Changes:**
-- ❌ Removed: `client.services.*`, `client.discovery.*`, `client.createPeer()` (low-level APIs)
-- ✅ Added: `client.exposeService()`, `client.connect()`, `client.connectByUuid()` (durable APIs)
-- ✅ Changed: Focus on durable connections with automatic reconnection and message queuing
-
 ## License
 
 MIT

USAGE.md

@@ -0,0 +1,281 @@
+# Rondevu Client Usage Guide
+
+## Installation
+
+```bash
+npm install @xtr-dev/rondevu-client
+```
+
+## Quick Start
+
+### 1. Register and Create Connection
+
+```typescript
+import { RondevuAPI, RondevuSignaler, WebRTCRondevuConnection } from '@xtr-dev/rondevu-client';
+
+const API_URL = 'https://api.ronde.vu';
+
+// Register to get credentials
+const api = new RondevuAPI(API_URL);
+const credentials = await api.register();
+
+// Create authenticated API client
+const authenticatedApi = new RondevuAPI(API_URL, credentials);
+```
+
+### 2. Create an Offer (Offerer Side)
+
+```typescript
+// Create a connection
+const connection = new WebRTCRondevuConnection(
+  'connection-id',
+  'host-username',
+  'service-name'
+);
+
+// Wait for local description
+await connection.ready;
+
+// Create offer on server
+const offers = await authenticatedApi.createOffers([{
+  sdp: connection.connection.localDescription!.sdp!,
+  ttl: 300000 // 5 minutes
+}]);
+
+const offerId = offers[0].id;
+
+// Set up signaler for ICE candidate exchange
+const signaler = new RondevuSignaler(authenticatedApi, offerId);
+connection.setSignaler(signaler);
+
+// Poll for answer
+const checkAnswer = setInterval(async () => {
+  const answer = await authenticatedApi.getAnswer(offerId);
+  if (answer) {
+    clearInterval(checkAnswer);
+    await connection.connection.setRemoteDescription({
+      type: 'answer',
+      sdp: answer.sdp
+    });
+    console.log('Connection established!');
+  }
+}, 1000);
+```
+
+### 3. Answer an Offer (Answerer Side)
+
+```typescript
+// Get the offer
+const offer = await authenticatedApi.getOffer(offerId);
+
+// Create connection with remote offer
+const connection = new WebRTCRondevuConnection(
+  'connection-id',
+  'peer-username',
+  'service-name',
+  {
+    type: 'offer',
+    sdp: offer.sdp
+  }
+);
+
+// Wait for local description (answer)
+await connection.ready;
+
+// Send answer to server
+await authenticatedApi.answerOffer(
+  offerId,
+  connection.connection.localDescription!.sdp!
+);
+
+// Set up signaler for ICE candidate exchange
+const signaler = new RondevuSignaler(authenticatedApi, offerId);
+connection.setSignaler(signaler);
+
+console.log('Connection established!');
+```
+
+## Using Services
+
+### Publish a Service
+
+```typescript
+import { RondevuAPI } from '@xtr-dev/rondevu-client';
+
+const api = new RondevuAPI(API_URL, credentials);
+
+const service = await api.publishService({
+  username: 'my-username',
+  serviceFqn: 'chat.app@1.0.0',
+  sdp: localDescription.sdp,
+  ttl: 300000,
+  isPublic: true,
+  metadata: { description: 'My chat service' },
+  signature: '...', // Ed25519 signature
+  message: '...'    // Signed message
+});
+
+console.log('Service UUID:', service.uuid);
+```
+
+### Connect to a Service
+
+```typescript
+// Search for services
+const services = await api.searchServices('username', 'chat.app@1.0.0');
+
+if (services.length > 0) {
+  // Get service details with offer
+  const service = await api.getService(services[0].uuid);
+
+  // Create connection with service offer
+  const connection = new WebRTCRondevuConnection(
+    service.serviceId,
+    service.username,
+    service.serviceFqn,
+    {
+      type: 'offer',
+      sdp: service.sdp
+    }
+  );
+
+  await connection.ready;
+
+  // Answer the service offer
+  await api.answerOffer(
+    service.offerId,
+    connection.connection.localDescription!.sdp!
+  );
+
+  // Set up signaler
+  const signaler = new RondevuSignaler(api, service.offerId);
+  connection.setSignaler(signaler);
+}
+```
+
+## Event Handling
+
+```typescript
+import { EventBus } from '@xtr-dev/rondevu-client';
+
+// Connection events
+connection.events.on('state-change', (state) => {
+  console.log('Connection state:', state);
+});
+
+connection.events.on('message', (message) => {
+  console.log('Received message:', message);
+});
+
+// Custom events with EventBus
+interface MyEvents {
+  'user:connected': { userId: string; timestamp: number };
+  'message:sent': string;
+}
+
+const events = new EventBus<MyEvents>();
+
+events.on('user:connected', (data) => {
+  console.log(`User ${data.userId} connected at ${data.timestamp}`);
+});
+
+events.emit('user:connected', {
+  userId: '123',
+  timestamp: Date.now()
+});
+```
+
+## Cleanup
+
+```typescript
+import { createBin } from '@xtr-dev/rondevu-client';
+
+const bin = createBin();
+
+// Add cleanup functions
+bin(
+  () => console.log('Cleanup 1'),
+  () => console.log('Cleanup 2')
+);
+
+// Clean all
+bin.clean();
+```
+
+## API Reference
+
+### RondevuAPI
+
+Complete API client for Rondevu signaling server.
+
+**Methods:**
+- `register()` - Register new peer
+- `createOffers(offers)` - Create offers
+- `getOffer(offerId)` - Get offer by ID
+- `answerOffer(offerId, sdp)` - Answer an offer
+- `getAnswer(offerId)` - Poll for answer
+- `searchOffers(topic)` - Search by topic
+- `addIceCandidates(offerId, candidates)` - Add ICE candidates
+- `getIceCandidates(offerId, since)` - Get ICE candidates (polling)
+- `publishService(service)` - Publish service
+- `getService(uuid)` - Get service by UUID
+- `searchServices(username, serviceFqn)` - Search services
+- `checkUsername(username)` - Check availability
+- `claimUsername(username, publicKey, signature, message)` - Claim username
+
+### RondevuSignaler
+
+Handles ICE candidate exchange via polling.
+
+**Constructor:**
+```typescript
+new RondevuSignaler(api: RondevuAPI, offerId: string)
+```
+
+**Methods:**
+- `addIceCandidate(candidate)` - Send local candidate
+- `addListener(callback)` - Poll for remote candidates (returns cleanup function)
+
+### WebRTCRondevuConnection
+
+WebRTC connection wrapper with type-safe events.
+
+**Constructor:**
+```typescript
+new WebRTCRondevuConnection(
+  id: string,
+  host: string,
+  service: string,
+  offer?: RTCSessionDescriptionInit
+)
+```
+
+**Properties:**
+- `id` - Connection ID
+- `host` - Host username
+- `service` - Service FQN
+- `state` - Connection state
+- `events` - EventBus for state changes and messages
+- `ready` - Promise that resolves when local description is set
+
+**Methods:**
+- `setSignaler(signaler)` - Set signaler for ICE exchange
+- `queueMessage(message, options)` - Queue message for sending
+- `sendMessage(message)` - Send message immediately
+
+### EventBus<TEvents>
+
+Type-safe event emitter with inferred types.
+
+**Methods:**
+- `on(event, handler)` - Subscribe
+- `once(event, handler)` - Subscribe once
+- `off(event, handler)` - Unsubscribe
+- `emit(event, data)` - Emit event
+- `clear(event?)` - Clear handlers
+- `listenerCount(event)` - Get listener count
+- `eventNames()` - Get event names
+
+## Examples
+
+See the demo application at https://github.com/xtr-dev/rondevu-demo for a complete working example.

eslint.config.js

@@ -0,0 +1,52 @@
+import js from '@eslint/js'
+import tsPlugin from '@typescript-eslint/eslint-plugin'
+import tsParser from '@typescript-eslint/parser'
+import prettierConfig from 'eslint-config-prettier'
+import prettierPlugin from 'eslint-plugin-prettier'
+import unicorn from 'eslint-plugin-unicorn'
+import globals from 'globals'
+
+export default [
+    js.configs.recommended,
+    {
+        files: ['**/*.ts', '**/*.tsx', '**/*.js'],
+        languageOptions: {
+            parser: tsParser,
+            parserOptions: {
+                ecmaVersion: 'latest',
+                sourceType: 'module',
+            },
+            globals: {
+                ...globals.browser,
+                ...globals.node,
+                RTCPeerConnection: 'readonly',
+                RTCIceCandidate: 'readonly',
+                RTCSessionDescriptionInit: 'readonly',
+                RTCIceCandidateInit: 'readonly',
+                BufferSource: 'readonly',
+            },
+        },
+        plugins: {
+            '@typescript-eslint': tsPlugin,
+            prettier: prettierPlugin,
+            unicorn: unicorn,
+        },
+        rules: {
+            ...tsPlugin.configs.recommended.rules,
+            ...prettierConfig.rules,
+            'prettier/prettier': 'error',
+            '@typescript-eslint/no-explicit-any': 'off',
+            '@typescript-eslint/no-unused-vars': ['warn', { argsIgnorePattern: '^_' }],
+            'unicorn/filename-case': [
+                'error',
+                {
+                    case: 'kebabCase',
+                    ignore: ['^README\\.md$'],
+                },
+            ],
+        },
+    },
+    {
+        ignores: ['dist/**', 'node_modules/**', '*.config.js'],
+    },
+]

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@xtr-dev/rondevu-client",
-  "version": "0.9.1",
+  "version": "0.13.0",
   "description": "TypeScript client for Rondevu with durable WebRTC connections, automatic reconnection, and message queuing",
   "type": "module",
   "main": "dist/index.js",
@@ -8,6 +8,10 @@
   "scripts": {
     "build": "tsc",
     "typecheck": "tsc --noEmit",
+    "dev": "vite",
+    "lint": "eslint src demo --ext .ts,.tsx,.js",
+    "lint:fix": "eslint src demo --ext .ts,.tsx,.js --fix",
+    "format": "prettier --write \"src/**/*.{ts,tsx,js}\" \"demo/**/*.{ts,tsx,js,html}\"",
     "prepublishOnly": "npm run build"
   },
   "keywords": [
@@ -20,7 +24,17 @@
   "author": "",
   "license": "MIT",
   "devDependencies": {
-    "typescript": "^5.9.3"
+    "@eslint/js": "^9.39.1",
+    "@typescript-eslint/eslint-plugin": "^8.48.1",
+    "@typescript-eslint/parser": "^8.48.1",
+    "eslint": "^9.39.1",
+    "eslint-config-prettier": "^10.1.8",
+    "eslint-plugin-prettier": "^5.5.4",
+    "eslint-plugin-unicorn": "^62.0.0",
+    "globals": "^16.5.0",
+    "prettier": "^3.7.4",
+    "typescript": "^5.9.3",
+    "vite": "^7.2.6"
   },
   "files": [
     "dist",

src/api.ts

@@ -0,0 +1,458 @@
+/**
+ * Rondevu API Client - Single class for all API endpoints
+ */
+
+import * as ed25519 from '@noble/ed25519'
+
+// Set SHA-512 hash function for ed25519 (required in @noble/ed25519 v3+)
+ed25519.hashes.sha512Async = async (message: Uint8Array) => {
+    return new Uint8Array(await crypto.subtle.digest('SHA-512', message as BufferSource))
+}
+
+export interface Credentials {
+    peerId: string
+    secret: string
+}
+
+export interface Keypair {
+    publicKey: string
+    privateKey: string
+}
+
+export interface OfferRequest {
+    sdp: string
+    topics?: string[]
+    ttl?: number
+    secret?: string
+}
+
+export interface Offer {
+    id: string
+    peerId: string
+    sdp: string
+    topics: string[]
+    ttl: number
+    createdAt: number
+    expiresAt: number
+    answererPeerId?: string
+}
+
+export interface OfferRequest {
+    sdp: string
+}
+
+export interface ServiceRequest {
+    serviceFqn: string // Must include username: service:version@username
+    offers: OfferRequest[]
+    ttl?: number
+    signature: string
+    message: string
+}
+
+export interface ServiceOffer {
+    offerId: string
+    sdp: string
+    createdAt: number
+    expiresAt: number
+}
+
+export interface Service {
+    serviceId: string
+    offers: ServiceOffer[]
+    username: string
+    serviceFqn: string
+    createdAt: number
+    expiresAt: number
+}
+
+export interface IceCandidate {
+    candidate: RTCIceCandidateInit
+    createdAt: number
+}
+
+/**
+ * Helper: Convert Uint8Array to base64 string
+ */
+function bytesToBase64(bytes: Uint8Array): string {
+    const binString = Array.from(bytes, byte => String.fromCodePoint(byte)).join('')
+    return btoa(binString)
+}
+
+/**
+ * Helper: Convert base64 string to Uint8Array
+ */
+function base64ToBytes(base64: string): Uint8Array {
+    const binString = atob(base64)
+    return Uint8Array.from(binString, char => char.codePointAt(0)!)
+}
+
+/**
+ * RondevuAPI - Complete API client for Rondevu signaling server
+ */
+export class RondevuAPI {
+    constructor(
+        private baseUrl: string,
+        private credentials?: Credentials
+    ) {}
+
+    /**
+     * Set credentials for authentication
+     */
+    setCredentials(credentials: Credentials): void {
+        this.credentials = credentials
+    }
+
+    /**
+     * Authentication header
+     */
+    private getAuthHeader(): Record<string, string> {
+        if (!this.credentials) {
+            return {}
+        }
+        return {
+            Authorization: `Bearer ${this.credentials.peerId}:${this.credentials.secret}`,
+        }
+    }
+
+    // ============================================
+    // Ed25519 Cryptography Helpers
+    // ============================================
+
+    /**
+     * Generate an Ed25519 keypair for username claiming and service publishing
+     */
+    static async generateKeypair(): Promise<Keypair> {
+        const privateKey = ed25519.utils.randomSecretKey()
+        const publicKey = await ed25519.getPublicKeyAsync(privateKey)
+
+        return {
+            publicKey: bytesToBase64(publicKey),
+            privateKey: bytesToBase64(privateKey),
+        }
+    }
+
+    /**
+     * Sign a message with an Ed25519 private key
+     */
+    static async signMessage(message: string, privateKeyBase64: string): Promise<string> {
+        const privateKey = base64ToBytes(privateKeyBase64)
+        const encoder = new TextEncoder()
+        const messageBytes = encoder.encode(message)
+
+        const signature = await ed25519.signAsync(messageBytes, privateKey)
+        return bytesToBase64(signature)
+    }
+
+    /**
+     * Verify a signature
+     */
+    static async verifySignature(
+        message: string,
+        signatureBase64: string,
+        publicKeyBase64: string
+    ): Promise<boolean> {
+        const publicKey = base64ToBytes(publicKeyBase64)
+        const signature = base64ToBytes(signatureBase64)
+        const encoder = new TextEncoder()
+        const messageBytes = encoder.encode(message)
+
+        return await ed25519.verifyAsync(signature, messageBytes, publicKey)
+    }
+
+    // ============================================
+    // Authentication
+    // ============================================
+
+    /**
+     * Register a new peer and get credentials
+     */
+    async register(): Promise<Credentials> {
+        const response = await fetch(`${this.baseUrl}/register`, {
+            method: 'POST',
+            headers: { 'Content-Type': 'application/json' },
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Registration failed: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    // ============================================
+    // Offers
+    // ============================================
+
+    /**
+     * Create one or more offers
+     */
+    async createOffers(offers: OfferRequest[]): Promise<Offer[]> {
+        const response = await fetch(`${this.baseUrl}/offers`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                ...this.getAuthHeader(),
+            },
+            body: JSON.stringify({ offers }),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to create offers: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Get offer by ID
+     */
+    async getOffer(offerId: string): Promise<Offer> {
+        const response = await fetch(`${this.baseUrl}/offers/${offerId}`, {
+            headers: this.getAuthHeader(),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to get offer: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Answer a specific offer from a service
+     */
+    async postOfferAnswer(serviceFqn: string, offerId: string, sdp: string): Promise<{ success: boolean; offerId: string }> {
+        const response = await fetch(`${this.baseUrl}/services/${encodeURIComponent(serviceFqn)}/offers/${offerId}/answer`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                ...this.getAuthHeader(),
+            },
+            body: JSON.stringify({ sdp }),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to answer offer: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Get answer for a specific offer (offerer polls this)
+     */
+    async getOfferAnswer(serviceFqn: string, offerId: string): Promise<{ sdp: string; offerId: string; answererId: string; answeredAt: number } | null> {
+        const response = await fetch(`${this.baseUrl}/services/${encodeURIComponent(serviceFqn)}/offers/${offerId}/answer`, {
+            headers: this.getAuthHeader(),
+        })
+
+        if (!response.ok) {
+            // 404 means not yet answered
+            if (response.status === 404) {
+                return null
+            }
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to get answer: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Search offers by topic
+     */
+    async searchOffers(topic: string): Promise<Offer[]> {
+        const response = await fetch(`${this.baseUrl}/offers?topic=${encodeURIComponent(topic)}`, {
+            headers: this.getAuthHeader(),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to search offers: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    // ============================================
+    // ICE Candidates
+    // ============================================
+
+    /**
+     * Add ICE candidates to a specific offer
+     */
+    async addOfferIceCandidates(serviceFqn: string, offerId: string, candidates: RTCIceCandidateInit[]): Promise<{ count: number; offerId: string }> {
+        const response = await fetch(`${this.baseUrl}/services/${encodeURIComponent(serviceFqn)}/offers/${offerId}/ice-candidates`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                ...this.getAuthHeader(),
+            },
+            body: JSON.stringify({ candidates }),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to add ICE candidates: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Get ICE candidates for a specific offer (with polling support)
+     */
+    async getOfferIceCandidates(serviceFqn: string, offerId: string, since: number = 0): Promise<{ candidates: IceCandidate[]; offerId: string }> {
+        const url = new URL(`${this.baseUrl}/services/${encodeURIComponent(serviceFqn)}/offers/${offerId}/ice-candidates`)
+        url.searchParams.set('since', since.toString())
+
+        const response = await fetch(url.toString(), { headers: this.getAuthHeader() })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to get ICE candidates: ${error.error || response.statusText}`)
+        }
+
+        const data = await response.json()
+        return {
+            candidates: data.candidates || [],
+            offerId: data.offerId
+        }
+    }
+
+    // ============================================
+    // Services
+    // ============================================
+
+    /**
+     * Publish a service
+     * Service FQN must include username: service:version@username
+     */
+    async publishService(service: ServiceRequest): Promise<Service> {
+        const response = await fetch(`${this.baseUrl}/services`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                ...this.getAuthHeader(),
+            },
+            body: JSON.stringify(service),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to publish service: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Get service by FQN (with username) - Direct lookup
+     * Example: chat:1.0.0@alice
+     */
+    async getService(serviceFqn: string): Promise<{ serviceId: string; username: string; serviceFqn: string; offerId: string; sdp: string; createdAt: number; expiresAt: number }> {
+        const response = await fetch(`${this.baseUrl}/services/${encodeURIComponent(serviceFqn)}`, {
+            headers: this.getAuthHeader(),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to get service: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Discover a random available service without knowing the username
+     * Example: chat:1.0.0 (without @username)
+     */
+    async discoverService(serviceVersion: string): Promise<{ serviceId: string; username: string; serviceFqn: string; offerId: string; sdp: string; createdAt: number; expiresAt: number }> {
+        const response = await fetch(`${this.baseUrl}/services/${encodeURIComponent(serviceVersion)}`, {
+            headers: this.getAuthHeader(),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to discover service: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Discover multiple available services with pagination
+     * Example: chat:1.0.0 (without @username)
+     */
+    async discoverServices(serviceVersion: string, limit: number = 10, offset: number = 0): Promise<{ services: Array<{ serviceId: string; username: string; serviceFqn: string; offerId: string; sdp: string; createdAt: number; expiresAt: number }>; count: number; limit: number; offset: number }> {
+        const url = new URL(`${this.baseUrl}/services/${encodeURIComponent(serviceVersion)}`)
+        url.searchParams.set('limit', limit.toString())
+        url.searchParams.set('offset', offset.toString())
+
+        const response = await fetch(url.toString(), {
+            headers: this.getAuthHeader(),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to discover services: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+
+    // ============================================
+    // Usernames
+    // ============================================
+
+    /**
+     * Check if username is available
+     */
+    async checkUsername(username: string): Promise<{ available: boolean; publicKey?: string; claimedAt?: number; expiresAt?: number }> {
+        const response = await fetch(
+            `${this.baseUrl}/users/${encodeURIComponent(username)}`
+        )
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to check username: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+
+    /**
+     * Claim a username (requires Ed25519 signature)
+     */
+    async claimUsername(
+        username: string,
+        publicKey: string,
+        signature: string,
+        message: string
+    ): Promise<{ success: boolean; username: string }> {
+        const response = await fetch(`${this.baseUrl}/users/${encodeURIComponent(username)}`, {
+            method: 'POST',
+            headers: {
+                'Content-Type': 'application/json',
+                ...this.getAuthHeader(),
+            },
+            body: JSON.stringify({
+                publicKey,
+                signature,
+                message,
+            }),
+        })
+
+        if (!response.ok) {
+            const error = await response.json().catch(() => ({ error: 'Unknown error' }))
+            throw new Error(`Failed to claim username: ${error.error || response.statusText}`)
+        }
+
+        return await response.json()
+    }
+}

src/auth.ts

@@ -1,62 +0,0 @@
-export interface Credentials {
-  peerId: string;
-  secret: string;
-}
-
-// Fetch-compatible function type
-export type FetchFunction = (
-  input: RequestInfo | URL,
-  init?: RequestInit
-) => Promise<Response>;
-
-export class RondevuAuth {
-  private fetchFn: FetchFunction;
-
-  constructor(
-    private baseUrl: string,
-    fetchFn?: FetchFunction
-  ) {
-    // Use provided fetch or fall back to global fetch
-    this.fetchFn = fetchFn || ((...args) => {
-      if (typeof globalThis.fetch === 'function') {
-        return globalThis.fetch(...args);
-      }
-      throw new Error(
-        'fetch is not available. Please provide a fetch implementation in the constructor options.'
-      );
-    });
-  }
-
-  /**
-   * Register a new peer and receive credentials
-   * Generates a cryptographically random peer ID (128-bit)
-   * @throws Error if registration fails
-   */
-  async register(): Promise<Credentials> {
-    const response = await this.fetchFn(`${this.baseUrl}/register`, {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-      },
-      body: JSON.stringify({}),
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Registration failed: ${error.error || response.statusText}`);
-    }
-
-    const data = await response.json();
-    return {
-      peerId: data.peerId,
-      secret: data.secret,
-    };
-  }
-
-  /**
-   * Create Authorization header value
-   */
-  static createAuthHeader(credentials: Credentials): string {
-    return `Bearer ${credentials.peerId}:${credentials.secret}`;
-  }
-}

src/durable/channel.ts

@@ -1,361 +0,0 @@
-/**
- * DurableChannel - Message queueing wrapper for RTCDataChannel
- *
- * Provides automatic message queuing during disconnections and transparent
- * flushing when the connection is re-established.
- */
-
-import { EventEmitter } from '../event-emitter.js';
-import {
-  DurableChannelState
-} from './types.js';
-import type {
-  DurableChannelConfig,
-  DurableChannelEvents,
-  QueuedMessage
-} from './types.js';
-
-/**
- * Default configuration for durable channels
- */
-const DEFAULT_CONFIG = {
-  maxQueueSize: 1000,
-  maxMessageAge: 60000, // 1 minute
-  ordered: true,
-  maxRetransmits: undefined
-} as const;
-
-/**
- * Durable channel that survives WebRTC peer connection drops
- *
- * The DurableChannel wraps an RTCDataChannel and provides:
- * - Automatic message queuing during disconnections
- * - Queue flushing on reconnection
- * - Configurable queue size and message age limits
- * - RTCDataChannel-compatible API
- *
- * @example
- * ```typescript
- * const channel = new DurableChannel('chat', connection, {
- *   maxQueueSize: 500,
- *   maxMessageAge: 30000
- * });
- *
- * channel.on('message', (data) => {
- *   console.log('Received:', data);
- * });
- *
- * channel.on('open', () => {
- *   channel.send('Hello!');
- * });
- *
- * // Messages sent during disconnection are automatically queued
- * channel.send('This will be queued if disconnected');
- * ```
- */
-export class DurableChannel extends EventEmitter<DurableChannelEvents> {
-  readonly label: string;
-  readonly config: DurableChannelConfig;
-
-  private _state: DurableChannelState;
-  private underlyingChannel?: RTCDataChannel;
-  private messageQueue: QueuedMessage[] = [];
-  private queueProcessing: boolean = false;
-  private _bufferedAmountLowThreshold: number = 0;
-
-  // Event handlers that need cleanup
-  private openHandler?: () => void;
-  private messageHandler?: (event: MessageEvent) => void;
-  private errorHandler?: (event: Event) => void;
-  private closeHandler?: () => void;
-  private bufferedAmountLowHandler?: () => void;
-
-  constructor(
-    label: string,
-    config?: DurableChannelConfig
-  ) {
-    super();
-    this.label = label;
-    this.config = { ...DEFAULT_CONFIG, ...config };
-    this._state = DurableChannelState.CONNECTING;
-  }
-
-  /**
-   * Current channel state
-   */
-  get readyState(): DurableChannelState {
-    return this._state;
-  }
-
-  /**
-   * Buffered amount from underlying channel (0 if no channel)
-   */
-  get bufferedAmount(): number {
-    return this.underlyingChannel?.bufferedAmount ?? 0;
-  }
-
-  /**
-   * Buffered amount low threshold
-   */
-  get bufferedAmountLowThreshold(): number {
-    return this._bufferedAmountLowThreshold;
-  }
-
-  set bufferedAmountLowThreshold(value: number) {
-    this._bufferedAmountLowThreshold = value;
-    if (this.underlyingChannel) {
-      this.underlyingChannel.bufferedAmountLowThreshold = value;
-    }
-  }
-
-  /**
-   * Send data through the channel
-   *
-   * If the channel is open, sends immediately. Otherwise, queues the message
-   * for delivery when the channel reconnects.
-   *
-   * @param data - Data to send
-   */
-  send(data: string | Blob | ArrayBuffer | ArrayBufferView): void {
-    if (this._state === DurableChannelState.OPEN && this.underlyingChannel) {
-      // Channel is open - send immediately
-      try {
-        this.underlyingChannel.send(data as any);
-      } catch (error) {
-        // Send failed - queue the message
-        this.enqueueMessage(data);
-        this.emit('error', error as Error);
-      }
-    } else if (this._state !== DurableChannelState.CLOSED) {
-      // Channel is not open but not closed - queue the message
-      this.enqueueMessage(data);
-    } else {
-      // Channel is closed - throw error
-      throw new Error('Cannot send on closed channel');
-    }
-  }
-
-  /**
-   * Close the channel
-   */
-  close(): void {
-    if (this._state === DurableChannelState.CLOSED ||
-        this._state === DurableChannelState.CLOSING) {
-      return;
-    }
-
-    this._state = DurableChannelState.CLOSING;
-
-    if (this.underlyingChannel) {
-      this.underlyingChannel.close();
-    }
-
-    this._state = DurableChannelState.CLOSED;
-    this.emit('close');
-  }
-
-  /**
-   * Attach to an underlying RTCDataChannel
-   *
-   * This is called when a WebRTC connection is established (or re-established).
-   * The channel will flush any queued messages and forward events.
-   *
-   * @param channel - RTCDataChannel to attach to
-   * @internal
-   */
-  attachToChannel(channel: RTCDataChannel): void {
-    // Detach from any existing channel first
-    this.detachFromChannel();
-
-    this.underlyingChannel = channel;
-
-    // Set buffered amount low threshold
-    channel.bufferedAmountLowThreshold = this._bufferedAmountLowThreshold;
-
-    // Setup event handlers
-    this.openHandler = () => {
-      this._state = DurableChannelState.OPEN;
-      this.emit('open');
-
-      // Flush queued messages
-      this.flushQueue().catch(error => {
-        this.emit('error', error);
-      });
-    };
-
-    this.messageHandler = (event: MessageEvent) => {
-      this.emit('message', event.data);
-    };
-
-    this.errorHandler = (event: Event) => {
-      this.emit('error', new Error(`Channel error: ${event.type}`));
-    };
-
-    this.closeHandler = () => {
-      if (this._state !== DurableChannelState.CLOSING &&
-          this._state !== DurableChannelState.CLOSED) {
-        // Unexpected close - transition to connecting (will reconnect)
-        this._state = DurableChannelState.CONNECTING;
-      }
-    };
-
-    this.bufferedAmountLowHandler = () => {
-      this.emit('bufferedAmountLow');
-    };
-
-    // Attach handlers
-    channel.addEventListener('open', this.openHandler);
-    channel.addEventListener('message', this.messageHandler);
-    channel.addEventListener('error', this.errorHandler);
-    channel.addEventListener('close', this.closeHandler);
-    channel.addEventListener('bufferedamountlow', this.bufferedAmountLowHandler);
-
-    // If channel is already open, trigger open event
-    if (channel.readyState === 'open') {
-      this.openHandler();
-    } else if (channel.readyState === 'connecting') {
-      this._state = DurableChannelState.CONNECTING;
-    }
-  }
-
-  /**
-   * Detach from the underlying RTCDataChannel
-   *
-   * This is called when a WebRTC connection drops. The channel remains alive
-   * and continues queuing messages.
-   *
-   * @internal
-   */
-  detachFromChannel(): void {
-    if (!this.underlyingChannel) {
-      return;
-    }
-
-    // Remove event listeners
-    if (this.openHandler) {
-      this.underlyingChannel.removeEventListener('open', this.openHandler);
-    }
-    if (this.messageHandler) {
-      this.underlyingChannel.removeEventListener('message', this.messageHandler);
-    }
-    if (this.errorHandler) {
-      this.underlyingChannel.removeEventListener('error', this.errorHandler);
-    }
-    if (this.closeHandler) {
-      this.underlyingChannel.removeEventListener('close', this.closeHandler);
-    }
-    if (this.bufferedAmountLowHandler) {
-      this.underlyingChannel.removeEventListener('bufferedamountlow', this.bufferedAmountLowHandler);
-    }
-
-    this.underlyingChannel = undefined;
-    this._state = DurableChannelState.CONNECTING;
-  }
-
-  /**
-   * Enqueue a message for later delivery
-   */
-  private enqueueMessage(data: string | Blob | ArrayBuffer | ArrayBufferView): void {
-    // Prune old messages first
-    this.pruneOldMessages();
-
-    const message: QueuedMessage = {
-      data,
-      enqueuedAt: Date.now(),
-      id: `msg-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`
-    };
-
-    this.messageQueue.push(message);
-
-    // Handle overflow
-    const maxQueueSize = this.config.maxQueueSize ?? 1000;
-    if (this.messageQueue.length > maxQueueSize) {
-      const excess = this.messageQueue.length - maxQueueSize;
-      this.messageQueue.splice(0, excess);
-      this.emit('queueOverflow', excess);
-      console.warn(
-        `DurableChannel[${this.label}]: Dropped ${excess} messages due to queue overflow`
-      );
-    }
-  }
-
-  /**
-   * Flush all queued messages through the channel
-   */
-  private async flushQueue(): Promise<void> {
-    if (this.queueProcessing || !this.underlyingChannel ||
-        this.underlyingChannel.readyState !== 'open') {
-      return;
-    }
-
-    this.queueProcessing = true;
-
-    try {
-      // Prune old messages before flushing
-      this.pruneOldMessages();
-
-      // Send all queued messages
-      while (this.messageQueue.length > 0) {
-        const message = this.messageQueue.shift();
-        if (!message) break;
-
-        try {
-          this.underlyingChannel.send(message.data as any);
-        } catch (error) {
-          // Send failed - re-queue message
-          this.messageQueue.unshift(message);
-          throw error;
-        }
-
-        // If buffer is getting full, wait for it to drain
-        if (this.underlyingChannel.bufferedAmount > 16 * 1024 * 1024) { // 16MB
-          await new Promise<void>((resolve) => {
-            const checkBuffer = () => {
-              if (!this.underlyingChannel ||
-                  this.underlyingChannel.bufferedAmount < 8 * 1024 * 1024) {
-                resolve();
-              } else {
-                setTimeout(checkBuffer, 100);
-              }
-            };
-            checkBuffer();
-          });
-        }
-      }
-    } finally {
-      this.queueProcessing = false;
-    }
-  }
-
-  /**
-   * Remove messages older than maxMessageAge from the queue
-   */
-  private pruneOldMessages(): void {
-    const maxMessageAge = this.config.maxMessageAge ?? 60000;
-    if (maxMessageAge === Infinity || maxMessageAge <= 0) {
-      return;
-    }
-
-    const now = Date.now();
-    const cutoff = now - maxMessageAge;
-
-    const originalLength = this.messageQueue.length;
-    this.messageQueue = this.messageQueue.filter(msg => msg.enqueuedAt >= cutoff);
-
-    const pruned = originalLength - this.messageQueue.length;
-    if (pruned > 0) {
-      console.warn(
-        `DurableChannel[${this.label}]: Pruned ${pruned} old messages (older than ${maxMessageAge}ms)`
-      );
-    }
-  }
-
-  /**
-   * Get the current queue size
-   *
-   * @internal
-   */
-  getQueueSize(): number {
-    return this.messageQueue.length;
-  }
-}

src/durable/connection.ts

@@ -1,453 +0,0 @@
-/**
- * DurableConnection - WebRTC connection with automatic reconnection
- *
- * Manages the WebRTC peer lifecycle and automatically reconnects on
- * connection drops with exponential backoff.
- */
-
-import { EventEmitter } from '../event-emitter.js';
-import RondevuPeer from '../peer/index.js';
-import type { RondevuOffers } from '../offers.js';
-import { DurableChannel } from './channel.js';
-import { createReconnectionScheduler, type ReconnectionScheduler } from './reconnection.js';
-import {
-  DurableConnectionState
-} from './types.js';
-import type {
-  DurableConnectionConfig,
-  DurableConnectionEvents,
-  ConnectionInfo
-} from './types.js';
-
-/**
- * Default configuration for durable connections
- */
-const DEFAULT_CONFIG: Required<DurableConnectionConfig> = {
-  maxReconnectAttempts: 10,
-  reconnectBackoffBase: 1000,
-  reconnectBackoffMax: 30000,
-  reconnectJitter: 0.2,
-  connectionTimeout: 30000,
-  maxQueueSize: 1000,
-  maxMessageAge: 60000,
-  rtcConfig: {
-    iceServers: [
-      { urls: 'stun:stun.l.google.com:19302' },
-      { urls: 'stun:stun1.l.google.com:19302' }
-    ]
-  }
-};
-
-/**
- * Durable WebRTC connection that automatically reconnects
- *
- * The DurableConnection manages the lifecycle of a WebRTC peer connection
- * and provides:
- * - Automatic reconnection with exponential backoff
- * - Multiple durable channels that survive reconnections
- * - Configurable retry limits and timeouts
- * - High-level connection state events
- *
- * @example
- * ```typescript
- * const connection = new DurableConnection(
- *   offersApi,
- *   { username: 'alice', serviceFqn: 'chat@1.0.0' },
- *   { maxReconnectAttempts: 5 }
- * );
- *
- * connection.on('connected', () => {
- *   console.log('Connected!');
- * });
- *
- * connection.on('reconnecting', (attempt, max, delay) => {
- *   console.log(`Reconnecting... (${attempt}/${max}, retry in ${delay}ms)`);
- * });
- *
- * const channel = connection.createChannel('chat');
- * channel.on('message', (data) => {
- *   console.log('Received:', data);
- * });
- *
- * await connection.connect();
- * ```
- */
-export class DurableConnection extends EventEmitter<DurableConnectionEvents> {
-  readonly connectionId: string;
-  readonly config: Required<DurableConnectionConfig>;
-  readonly connectionInfo: ConnectionInfo;
-
-  private _state: DurableConnectionState;
-  private currentPeer?: RondevuPeer;
-  private channels: Map<string, DurableChannel> = new Map();
-  private reconnectionScheduler?: ReconnectionScheduler;
-
-  // Track peer event handlers for cleanup
-  private peerConnectedHandler?: () => void;
-  private peerDisconnectedHandler?: () => void;
-  private peerFailedHandler?: (error: Error) => void;
-  private peerDataChannelHandler?: (channel: RTCDataChannel) => void;
-
-  constructor(
-    private offersApi: RondevuOffers,
-    connectionInfo: ConnectionInfo,
-    config?: DurableConnectionConfig
-  ) {
-    super();
-    this.connectionId = `conn-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
-    this.config = { ...DEFAULT_CONFIG, ...config };
-    this.connectionInfo = connectionInfo;
-    this._state = DurableConnectionState.CONNECTING;
-  }
-
-  /**
-   * Current connection state
-   */
-  getState(): DurableConnectionState {
-    return this._state;
-  }
-
-  /**
-   * Check if connection is currently connected
-   */
-  isConnected(): boolean {
-    return this._state === DurableConnectionState.CONNECTED;
-  }
-
-  /**
-   * Create a durable channel on this connection
-   *
-   * The channel will be created on the current peer connection if available,
-   * otherwise it will be created when the connection is established.
-   *
-   * @param label - Channel label
-   * @param options - RTCDataChannel init options
-   * @returns DurableChannel instance
-   */
-  createChannel(label: string, options?: RTCDataChannelInit): DurableChannel {
-    // Check if channel already exists
-    if (this.channels.has(label)) {
-      throw new Error(`Channel with label '${label}' already exists`);
-    }
-
-    // Create durable channel
-    const durableChannel = new DurableChannel(label, {
-      maxQueueSize: this.config.maxQueueSize,
-      maxMessageAge: this.config.maxMessageAge,
-      ordered: options?.ordered ?? true,
-      maxRetransmits: options?.maxRetransmits
-    });
-
-    this.channels.set(label, durableChannel);
-
-    // If we have a current peer, attach the channel
-    if (this.currentPeer && this._state === DurableConnectionState.CONNECTED) {
-      this.createAndAttachChannel(durableChannel, options);
-    }
-
-    return durableChannel;
-  }
-
-  /**
-   * Get an existing channel by label
-   */
-  getChannel(label: string): DurableChannel | undefined {
-    return this.channels.get(label);
-  }
-
-  /**
-   * Establish the initial connection
-   *
-   * @returns Promise that resolves when connected
-   */
-  async connect(): Promise<void> {
-    if (this._state !== DurableConnectionState.CONNECTING) {
-      throw new Error(`Cannot connect from state: ${this._state}`);
-    }
-
-    try {
-      await this.establishConnection();
-    } catch (error) {
-      this._state = DurableConnectionState.DISCONNECTED;
-      await this.handleDisconnection();
-      throw error;
-    }
-  }
-
-  /**
-   * Close the connection gracefully
-   */
-  async close(): Promise<void> {
-    if (this._state === DurableConnectionState.CLOSED) {
-      return;
-    }
-
-    const previousState = this._state;
-    this._state = DurableConnectionState.CLOSED;
-
-    // Cancel any ongoing reconnection
-    if (this.reconnectionScheduler) {
-      this.reconnectionScheduler.cancel();
-    }
-
-    // Close all channels
-    for (const channel of this.channels.values()) {
-      channel.close();
-    }
-
-    // Close peer connection
-    if (this.currentPeer) {
-      await this.currentPeer.close();
-      this.currentPeer = undefined;
-    }
-
-    this.emit('state', this._state, previousState);
-    this.emit('closed');
-  }
-
-  /**
-   * Establish a WebRTC connection
-   */
-  private async establishConnection(): Promise<void> {
-    // Create new peer
-    const peer = new RondevuPeer(this.offersApi, this.config.rtcConfig);
-    this.currentPeer = peer;
-
-    // Setup peer event handlers
-    this.setupPeerHandlers(peer);
-
-    // Determine connection method based on connection info
-    if (this.connectionInfo.uuid) {
-      // Connect by UUID
-      await this.connectByUuid(peer, this.connectionInfo.uuid);
-    } else if (this.connectionInfo.username && this.connectionInfo.serviceFqn) {
-      // Connect by username and service FQN
-      await this.connectByService(peer, this.connectionInfo.username, this.connectionInfo.serviceFqn);
-    } else {
-      throw new Error('Invalid connection info: must provide either uuid or (username + serviceFqn)');
-    }
-
-    // Wait for connection with timeout
-    await this.waitForConnection(peer);
-
-    // Connection established
-    this.transitionToConnected();
-  }
-
-  /**
-   * Connect to a service by UUID
-   */
-  private async connectByUuid(peer: RondevuPeer, uuid: string): Promise<void> {
-    // Get service details
-    const response = await fetch(`${this.offersApi['baseUrl']}/services/${uuid}`);
-    if (!response.ok) {
-      throw new Error(`Service not found: ${uuid}`);
-    }
-
-    const service = await response.json();
-
-    // Answer the offer
-    await peer.answer(service.offerId, service.sdp, {
-      secret: this.offersApi['credentials'].secret,
-      topics: []
-    });
-  }
-
-  /**
-   * Connect to a service by username and service FQN
-   */
-  private async connectByService(peer: RondevuPeer, username: string, serviceFqn: string): Promise<void> {
-    // Query service to get UUID
-    const response = await fetch(`${this.offersApi['baseUrl']}/index/${username}/query`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({ serviceFqn })
-    });
-
-    if (!response.ok) {
-      throw new Error(`Service not found: ${username}/${serviceFqn}`);
-    }
-
-    const { uuid } = await response.json();
-
-    // Connect by UUID
-    await this.connectByUuid(peer, uuid);
-  }
-
-  /**
-   * Wait for peer connection to establish
-   */
-  private async waitForConnection(peer: RondevuPeer): Promise<void> {
-    return new Promise((resolve, reject) => {
-      const timeout = setTimeout(() => {
-        reject(new Error('Connection timeout'));
-      }, this.config.connectionTimeout);
-
-      const onConnected = () => {
-        clearTimeout(timeout);
-        peer.off('connected', onConnected);
-        peer.off('failed', onFailed);
-        resolve();
-      };
-
-      const onFailed = (error: Error) => {
-        clearTimeout(timeout);
-        peer.off('connected', onConnected);
-        peer.off('failed', onFailed);
-        reject(error);
-      };
-
-      peer.on('connected', onConnected);
-      peer.on('failed', onFailed);
-    });
-  }
-
-  /**
-   * Setup event handlers for peer
-   */
-  private setupPeerHandlers(peer: RondevuPeer): void {
-    this.peerConnectedHandler = () => {
-      // Connection established - will be handled by waitForConnection
-    };
-
-    this.peerDisconnectedHandler = () => {
-      if (this._state !== DurableConnectionState.CLOSED) {
-        this.handleDisconnection();
-      }
-    };
-
-    this.peerFailedHandler = (error: Error) => {
-      if (this._state !== DurableConnectionState.CLOSED) {
-        console.error('Peer connection failed:', error);
-        this.handleDisconnection();
-      }
-    };
-
-    this.peerDataChannelHandler = (channel: RTCDataChannel) => {
-      // Find or create durable channel
-      let durableChannel = this.channels.get(channel.label);
-
-      if (!durableChannel) {
-        // Auto-create channel for incoming data channels
-        durableChannel = new DurableChannel(channel.label, {
-          maxQueueSize: this.config.maxQueueSize,
-          maxMessageAge: this.config.maxMessageAge
-        });
-        this.channels.set(channel.label, durableChannel);
-      }
-
-      // Attach the received channel
-      durableChannel.attachToChannel(channel);
-    };
-
-    peer.on('connected', this.peerConnectedHandler);
-    peer.on('disconnected', this.peerDisconnectedHandler);
-    peer.on('failed', this.peerFailedHandler);
-    peer.on('datachannel', this.peerDataChannelHandler);
-  }
-
-  /**
-   * Transition to connected state
-   */
-  private transitionToConnected(): void {
-    const previousState = this._state;
-    this._state = DurableConnectionState.CONNECTED;
-
-    // Reset reconnection scheduler if it exists
-    if (this.reconnectionScheduler) {
-      this.reconnectionScheduler.reset();
-    }
-
-    // Attach all channels to the new peer connection
-    for (const [label, channel] of this.channels) {
-      if (this.currentPeer) {
-        this.createAndAttachChannel(channel);
-      }
-    }
-
-    this.emit('state', this._state, previousState);
-    this.emit('connected');
-  }
-
-  /**
-   * Create underlying RTCDataChannel and attach to durable channel
-   */
-  private createAndAttachChannel(
-    durableChannel: DurableChannel,
-    options?: RTCDataChannelInit
-  ): void {
-    if (!this.currentPeer) {
-      return;
-    }
-
-    // Check if peer already has this channel (received via datachannel event)
-    // If not, create it
-    const senders = (this.currentPeer.pc as any).getSenders?.() || [];
-    const existingChannel = Array.from(senders as RTCRtpSender[])
-      .map((sender) => (sender as any).channel as RTCDataChannel)
-      .find(ch => ch && ch.label === durableChannel.label);
-
-    if (existingChannel) {
-      durableChannel.attachToChannel(existingChannel);
-    } else {
-      // Create new channel on peer
-      const rtcChannel = this.currentPeer.createDataChannel(
-        durableChannel.label,
-        options
-      );
-      durableChannel.attachToChannel(rtcChannel);
-    }
-  }
-
-  /**
-   * Handle connection disconnection
-   */
-  private async handleDisconnection(): Promise<void> {
-    if (this._state === DurableConnectionState.CLOSED ||
-        this._state === DurableConnectionState.FAILED) {
-      return;
-    }
-
-    const previousState = this._state;
-    this._state = DurableConnectionState.RECONNECTING;
-
-    this.emit('state', this._state, previousState);
-    this.emit('disconnected');
-
-    // Detach all channels (but keep them alive)
-    for (const channel of this.channels.values()) {
-      channel.detachFromChannel();
-    }
-
-    // Close old peer
-    if (this.currentPeer) {
-      await this.currentPeer.close();
-      this.currentPeer = undefined;
-    }
-
-    // Create or use existing reconnection scheduler
-    if (!this.reconnectionScheduler) {
-      this.reconnectionScheduler = createReconnectionScheduler({
-        maxAttempts: this.config.maxReconnectAttempts,
-        backoffBase: this.config.reconnectBackoffBase,
-        backoffMax: this.config.reconnectBackoffMax,
-        jitter: this.config.reconnectJitter,
-        onReconnect: async () => {
-          await this.establishConnection();
-        },
-        onMaxAttemptsExceeded: (error) => {
-          const prevState = this._state;
-          this._state = DurableConnectionState.FAILED;
-          this.emit('state', this._state, prevState);
-          this.emit('failed', error, true);
-        },
-        onBeforeAttempt: (attempt, max, delay) => {
-          this.emit('reconnecting', attempt, max, delay);
-        }
-      });
-    }
-
-    // Schedule reconnection
-    this.reconnectionScheduler.schedule();
-  }
-}

src/durable/reconnection.ts

@@ -1,200 +0,0 @@
-/**
- * Reconnection utilities for durable connections
- *
- * This module provides utilities for managing reconnection logic with
- * exponential backoff and jitter.
- */
-
-/**
- * Calculate exponential backoff delay with jitter
- *
- * @param attempt - Current attempt number (0-indexed)
- * @param base - Base delay in milliseconds
- * @param max - Maximum delay in milliseconds
- * @param jitter - Jitter factor (0-1), e.g., 0.2 for ±20%
- * @returns Delay in milliseconds with jitter applied
- *
- * @example
- * ```typescript
- * calculateBackoff(0, 1000, 30000, 0.2) // ~1000ms ± 20%
- * calculateBackoff(1, 1000, 30000, 0.2) // ~2000ms ± 20%
- * calculateBackoff(2, 1000, 30000, 0.2) // ~4000ms ± 20%
- * calculateBackoff(5, 1000, 30000, 0.2) // ~30000ms ± 20% (capped at max)
- * ```
- */
-export function calculateBackoff(
-  attempt: number,
-  base: number,
-  max: number,
-  jitter: number
-): number {
-  // Calculate exponential delay: base * 2^attempt
-  const exponential = base * Math.pow(2, attempt);
-
-  // Cap at maximum
-  const capped = Math.min(exponential, max);
-
-  // Apply jitter: ± (jitter * capped)
-  const jitterAmount = capped * jitter;
-  const randomJitter = (Math.random() * 2 - 1) * jitterAmount;
-
-  // Return delay with jitter, ensuring it's not negative
-  return Math.max(0, capped + randomJitter);
-}
-
-/**
- * Configuration for reconnection scheduler
- */
-export interface ReconnectionSchedulerConfig {
-  /** Maximum number of reconnection attempts */
-  maxAttempts: number;
-
-  /** Base delay for exponential backoff */
-  backoffBase: number;
-
-  /** Maximum delay between attempts */
-  backoffMax: number;
-
-  /** Jitter factor for randomizing delays */
-  jitter: number;
-
-  /** Callback invoked for each reconnection attempt */
-  onReconnect: () => Promise<void>;
-
-  /** Callback invoked when max attempts exceeded */
-  onMaxAttemptsExceeded: (error: Error) => void;
-
-  /** Optional callback invoked before each attempt */
-  onBeforeAttempt?: (attempt: number, maxAttempts: number, delay: number) => void;
-}
-
-/**
- * Reconnection scheduler state
- */
-export interface ReconnectionScheduler {
-  /** Current attempt number */
-  attempt: number;
-
-  /** Whether scheduler is active */
-  active: boolean;
-
-  /** Schedule next reconnection attempt */
-  schedule: () => void;
-
-  /** Cancel scheduled reconnection */
-  cancel: () => void;
-
-  /** Reset attempt counter */
-  reset: () => void;
-}
-
-/**
- * Create a reconnection scheduler
- *
- * @param config - Scheduler configuration
- * @returns Reconnection scheduler instance
- *
- * @example
- * ```typescript
- * const scheduler = createReconnectionScheduler({
- *   maxAttempts: 10,
- *   backoffBase: 1000,
- *   backoffMax: 30000,
- *   jitter: 0.2,
- *   onReconnect: async () => {
- *     await connect();
- *   },
- *   onMaxAttemptsExceeded: (error) => {
- *     console.error('Failed to reconnect:', error);
- *   },
- *   onBeforeAttempt: (attempt, max, delay) => {
- *     console.log(`Reconnecting in ${delay}ms (${attempt}/${max})...`);
- *   }
- * });
- *
- * // Start reconnection
- * scheduler.schedule();
- *
- * // Cancel reconnection
- * scheduler.cancel();
- * ```
- */
-export function createReconnectionScheduler(
-  config: ReconnectionSchedulerConfig
-): ReconnectionScheduler {
-  let attempt = 0;
-  let active = false;
-  let timer: ReturnType<typeof setTimeout> | undefined;
-
-  const schedule = () => {
-    // Cancel any existing timer
-    if (timer) {
-      clearTimeout(timer);
-      timer = undefined;
-    }
-
-    // Check if max attempts exceeded
-    if (attempt >= config.maxAttempts) {
-      active = false;
-      config.onMaxAttemptsExceeded(
-        new Error(`Max reconnection attempts exceeded (${config.maxAttempts})`)
-      );
-      return;
-    }
-
-    // Calculate delay
-    const delay = calculateBackoff(
-      attempt,
-      config.backoffBase,
-      config.backoffMax,
-      config.jitter
-    );
-
-    // Notify before attempt
-    if (config.onBeforeAttempt) {
-      config.onBeforeAttempt(attempt + 1, config.maxAttempts, delay);
-    }
-
-    // Mark as active
-    active = true;
-
-    // Schedule reconnection
-    timer = setTimeout(async () => {
-      attempt++;
-      try {
-        await config.onReconnect();
-        // Success - reset scheduler
-        attempt = 0;
-        active = false;
-      } catch (error) {
-        // Failure - schedule next attempt
-        schedule();
-      }
-    }, delay);
-  };
-
-  const cancel = () => {
-    if (timer) {
-      clearTimeout(timer);
-      timer = undefined;
-    }
-    active = false;
-  };
-
-  const reset = () => {
-    cancel();
-    attempt = 0;
-  };
-
-  return {
-    get attempt() {
-      return attempt;
-    },
-    get active() {
-      return active;
-    },
-    schedule,
-    cancel,
-    reset
-  };
-}

src/durable/service.ts

@@ -1,329 +0,0 @@
-/**
- * DurableService - Service with automatic TTL refresh
- *
- * Manages service publishing with automatic reconnection for incoming
- * connections and TTL auto-refresh to prevent expiration.
- */
-
-import { EventEmitter } from '../event-emitter.js';
-import { ServicePool, type PoolStatus } from '../service-pool.js';
-import type { RondevuOffers } from '../offers.js';
-import { DurableChannel } from './channel.js';
-import type {
-  DurableServiceConfig,
-  DurableServiceEvents,
-  ServiceInfo
-} from './types.js';
-
-/**
- * Connection handler callback
- */
-export type ConnectionHandler = (
-  channel: DurableChannel,
-  connectionId: string
-) => void | Promise<void>;
-
-/**
- * Default configuration for durable services
- */
-const DEFAULT_CONFIG = {
-  isPublic: false,
-  ttlRefreshMargin: 0.2,
-  poolSize: 1,
-  pollingInterval: 2000,
-  maxReconnectAttempts: 10,
-  reconnectBackoffBase: 1000,
-  reconnectBackoffMax: 30000,
-  reconnectJitter: 0.2,
-  connectionTimeout: 30000,
-  maxQueueSize: 1000,
-  maxMessageAge: 60000,
-  rtcConfig: {
-    iceServers: [
-      { urls: 'stun:stun.l.google.com:19302' },
-      { urls: 'stun:stun1.l.google.com:19302' }
-    ]
-  }
-};
-
-/**
- * Durable service that automatically refreshes TTL and handles reconnections
- *
- * The DurableService manages service publishing and provides:
- * - Automatic TTL refresh before expiration
- * - Durable connections for incoming peers
- * - Connection pooling for multiple simultaneous connections
- * - High-level connection lifecycle events
- *
- * @example
- * ```typescript
- * const service = new DurableService(
- *   offersApi,
- *   (channel, connectionId) => {
- *     channel.on('message', (data) => {
- *       console.log(`Message from ${connectionId}:`, data);
- *       channel.send(`Echo: ${data}`);
- *     });
- *   },
- *   {
- *     username: 'alice',
- *     privateKey: keypair.privateKey,
- *     serviceFqn: 'chat@1.0.0',
- *     poolSize: 10
- *   }
- * );
- *
- * service.on('published', (serviceId, uuid) => {
- *   console.log(`Service published: ${uuid}`);
- * });
- *
- * service.on('connection', (connectionId) => {
- *   console.log(`New connection: ${connectionId}`);
- * });
- *
- * await service.start();
- * ```
- */
-export class DurableService extends EventEmitter<DurableServiceEvents> {
-  readonly config: Required<DurableServiceConfig>;
-
-  private serviceId?: string;
-  private uuid?: string;
-  private expiresAt?: number;
-  private ttlRefreshTimer?: ReturnType<typeof setTimeout>;
-  private servicePool?: ServicePool;
-  private activeChannels: Map<string, DurableChannel> = new Map();
-
-  constructor(
-    private offersApi: RondevuOffers,
-    private baseUrl: string,
-    private credentials: { peerId: string; secret: string },
-    private handler: ConnectionHandler,
-    config: DurableServiceConfig
-  ) {
-    super();
-    this.config = { ...DEFAULT_CONFIG, ...config } as Required<DurableServiceConfig>;
-  }
-
-  /**
-   * Start the service
-   *
-   * Publishes the service and begins accepting connections.
-   *
-   * @returns Service information
-   */
-  async start(): Promise<ServiceInfo> {
-    if (this.servicePool) {
-      throw new Error('Service already started');
-    }
-
-    // Create and start service pool
-    this.servicePool = new ServicePool(
-      this.baseUrl,
-      this.credentials,
-      {
-        username: this.config.username,
-        privateKey: this.config.privateKey,
-        serviceFqn: this.config.serviceFqn,
-        rtcConfig: this.config.rtcConfig,
-        isPublic: this.config.isPublic,
-        metadata: this.config.metadata,
-        ttl: this.config.ttl,
-        poolSize: this.config.poolSize,
-        pollingInterval: this.config.pollingInterval,
-        handler: (channel, peer, connectionId) => {
-          this.handleNewConnection(channel, connectionId);
-        },
-        onPoolStatus: (status) => {
-          // Could emit pool status event if needed
-        },
-        onError: (error, context) => {
-          this.emit('error', error, context);
-        }
-      }
-    );
-
-    const handle = await this.servicePool.start();
-
-    // Store service info
-    this.serviceId = handle.serviceId;
-    this.uuid = handle.uuid;
-    this.expiresAt = Date.now() + (this.config.ttl || 300000); // Default 5 minutes
-
-    this.emit('published', this.serviceId, this.uuid);
-
-    // Schedule TTL refresh
-    this.scheduleRefresh();
-
-    return {
-      serviceId: this.serviceId,
-      uuid: this.uuid,
-      expiresAt: this.expiresAt
-    };
-  }
-
-  /**
-   * Stop the service
-   *
-   * Unpublishes the service and closes all active connections.
-   */
-  async stop(): Promise<void> {
-    // Cancel TTL refresh
-    if (this.ttlRefreshTimer) {
-      clearTimeout(this.ttlRefreshTimer);
-      this.ttlRefreshTimer = undefined;
-    }
-
-    // Close all active channels
-    for (const channel of this.activeChannels.values()) {
-      channel.close();
-    }
-    this.activeChannels.clear();
-
-    // Stop service pool
-    if (this.servicePool) {
-      await this.servicePool.stop();
-      this.servicePool = undefined;
-    }
-
-    this.emit('closed');
-  }
-
-  /**
-   * Get list of active connection IDs
-   */
-  getActiveConnections(): string[] {
-    return Array.from(this.activeChannels.keys());
-  }
-
-  /**
-   * Get service information
-   */
-  getServiceInfo(): ServiceInfo | null {
-    if (!this.serviceId || !this.uuid || !this.expiresAt) {
-      return null;
-    }
-
-    return {
-      serviceId: this.serviceId,
-      uuid: this.uuid,
-      expiresAt: this.expiresAt
-    };
-  }
-
-  /**
-   * Schedule TTL refresh
-   */
-  private scheduleRefresh(): void {
-    if (!this.expiresAt || !this.config.ttl) {
-      return;
-    }
-
-    // Cancel existing timer
-    if (this.ttlRefreshTimer) {
-      clearTimeout(this.ttlRefreshTimer);
-    }
-
-    // Calculate refresh time (default: refresh at 80% of TTL)
-    const timeUntilExpiry = this.expiresAt - Date.now();
-    const refreshMargin = timeUntilExpiry * this.config.ttlRefreshMargin;
-    const refreshTime = Math.max(0, timeUntilExpiry - refreshMargin);
-
-    // Schedule refresh
-    this.ttlRefreshTimer = setTimeout(() => {
-      this.refreshServiceTTL().catch(error => {
-        this.emit('error', error, 'ttl-refresh');
-        // Retry after short delay
-        setTimeout(() => this.scheduleRefresh(), 5000);
-      });
-    }, refreshTime);
-  }
-
-  /**
-   * Refresh service TTL
-   */
-  private async refreshServiceTTL(): Promise<void> {
-    if (!this.serviceId || !this.uuid) {
-      return;
-    }
-
-    // Delete old service
-    await this.servicePool?.stop();
-
-    // Recreate service pool (this republishes the service)
-    this.servicePool = new ServicePool(
-      this.baseUrl,
-      this.credentials,
-      {
-        username: this.config.username,
-        privateKey: this.config.privateKey,
-        serviceFqn: this.config.serviceFqn,
-        rtcConfig: this.config.rtcConfig,
-        isPublic: this.config.isPublic,
-        metadata: this.config.metadata,
-        ttl: this.config.ttl,
-        poolSize: this.config.poolSize,
-        pollingInterval: this.config.pollingInterval,
-        handler: (channel, peer, connectionId) => {
-          this.handleNewConnection(channel, connectionId);
-        },
-        onPoolStatus: (status) => {
-          // Could emit pool status event if needed
-        },
-        onError: (error, context) => {
-          this.emit('error', error, context);
-        }
-      }
-    );
-
-    const handle = await this.servicePool.start();
-
-    // Update service info
-    this.serviceId = handle.serviceId;
-    this.uuid = handle.uuid;
-    this.expiresAt = Date.now() + (this.config.ttl || 300000);
-
-    this.emit('ttl-refreshed', this.expiresAt);
-
-    // Schedule next refresh
-    this.scheduleRefresh();
-  }
-
-  /**
-   * Handle new incoming connection
-   */
-  private handleNewConnection(channel: RTCDataChannel, connectionId: string): void {
-    // Create durable channel
-    const durableChannel = new DurableChannel(channel.label, {
-      maxQueueSize: this.config.maxQueueSize,
-      maxMessageAge: this.config.maxMessageAge
-    });
-
-    // Attach to underlying channel
-    durableChannel.attachToChannel(channel);
-
-    // Track channel
-    this.activeChannels.set(connectionId, durableChannel);
-
-    // Setup cleanup on close
-    durableChannel.on('close', () => {
-      this.activeChannels.delete(connectionId);
-      this.emit('disconnection', connectionId);
-    });
-
-    // Emit connection event
-    this.emit('connection', connectionId);
-
-    // Invoke user handler
-    try {
-      const result = this.handler(durableChannel, connectionId);
-      if (result && typeof result.then === 'function') {
-        result.catch(error => {
-          this.emit('error', error, 'handler');
-        });
-      }
-    } catch (error) {
-      this.emit('error', error as Error, 'handler');
-    }
-  }
-}

src/durable/types.ts

@@ -1,184 +0,0 @@
-/**
- * Type definitions for durable WebRTC connections
- *
- * This module defines all interfaces, enums, and types used by the durable
- * connection system for automatic reconnection and message queuing.
- */
-
-/**
- * Connection state enum
- */
-export enum DurableConnectionState {
-  CONNECTING = 'connecting',
-  CONNECTED = 'connected',
-  RECONNECTING = 'reconnecting',
-  DISCONNECTED = 'disconnected',
-  FAILED = 'failed',
-  CLOSED = 'closed'
-}
-
-/**
- * Channel state enum
- */
-export enum DurableChannelState {
-  CONNECTING = 'connecting',
-  OPEN = 'open',
-  CLOSING = 'closing',
-  CLOSED = 'closed'
-}
-
-/**
- * Configuration for durable connections
- */
-export interface DurableConnectionConfig {
-  /** Maximum number of reconnection attempts (default: 10) */
-  maxReconnectAttempts?: number;
-
-  /** Base delay for exponential backoff in milliseconds (default: 1000) */
-  reconnectBackoffBase?: number;
-
-  /** Maximum delay between reconnection attempts in milliseconds (default: 30000) */
-  reconnectBackoffMax?: number;
-
-  /** Jitter factor for randomizing reconnection delays (default: 0.2 = ±20%) */
-  reconnectJitter?: number;
-
-  /** Timeout for initial connection attempt in milliseconds (default: 30000) */
-  connectionTimeout?: number;
-
-  /** Maximum number of messages to queue during disconnection (default: 1000) */
-  maxQueueSize?: number;
-
-  /** Maximum age of queued messages in milliseconds (default: 60000) */
-  maxMessageAge?: number;
-
-  /** WebRTC configuration */
-  rtcConfig?: RTCConfiguration;
-}
-
-/**
- * Configuration for durable channels
- */
-export interface DurableChannelConfig {
-  /** Maximum number of messages to queue (default: 1000) */
-  maxQueueSize?: number;
-
-  /** Maximum age of queued messages in milliseconds (default: 60000) */
-  maxMessageAge?: number;
-
-  /** Whether messages should be delivered in order (default: true) */
-  ordered?: boolean;
-
-  /** Maximum retransmits for unordered channels (default: undefined) */
-  maxRetransmits?: number;
-}
-
-/**
- * Configuration for durable services
- */
-export interface DurableServiceConfig extends DurableConnectionConfig {
-  /** Username that owns the service */
-  username: string;
-
-  /** Private key for signing service operations */
-  privateKey: string;
-
-  /** Fully qualified service name (e.g., com.example.chat@1.0.0) */
-  serviceFqn: string;
-
-  /** Whether the service is publicly discoverable (default: false) */
-  isPublic?: boolean;
-
-  /** Optional metadata for the service */
-  metadata?: Record<string, any>;
-
-  /** Time-to-live for service in milliseconds (default: server default) */
-  ttl?: number;
-
-  /** Margin before TTL expiry to trigger refresh (default: 0.2 = refresh at 80%) */
-  ttlRefreshMargin?: number;
-
-  /** Number of simultaneous open offers to maintain (default: 1) */
-  poolSize?: number;
-
-  /** Polling interval for checking answers in milliseconds (default: 2000) */
-  pollingInterval?: number;
-}
-
-/**
- * Queued message structure
- */
-export interface QueuedMessage {
-  /** Message data */
-  data: string | Blob | ArrayBuffer | ArrayBufferView;
-
-  /** Timestamp when message was enqueued */
-  enqueuedAt: number;
-
-  /** Unique message ID */
-  id: string;
-}
-
-/**
- * Event type map for DurableConnection
- */
-export interface DurableConnectionEvents extends Record<string, (...args: any[]) => void> {
-  'state': (state: DurableConnectionState, previousState: DurableConnectionState) => void;
-  'connected': () => void;
-  'reconnecting': (attempt: number, maxAttempts: number, nextRetryIn: number) => void;
-  'disconnected': () => void;
-  'failed': (error: Error, permanent: boolean) => void;
-  'closed': () => void;
-}
-
-/**
- * Event type map for DurableChannel
- */
-export interface DurableChannelEvents extends Record<string, (...args: any[]) => void> {
-  'open': () => void;
-  'message': (data: any) => void;
-  'error': (error: Error) => void;
-  'close': () => void;
-  'bufferedAmountLow': () => void;
-  'queueOverflow': (droppedCount: number) => void;
-}
-
-/**
- * Event type map for DurableService
- */
-export interface DurableServiceEvents extends Record<string, (...args: any[]) => void> {
-  'published': (serviceId: string, uuid: string) => void;
-  'connection': (connectionId: string) => void;
-  'disconnection': (connectionId: string) => void;
-  'ttl-refreshed': (expiresAt: number) => void;
-  'error': (error: Error, context: string) => void;
-  'closed': () => void;
-}
-
-/**
- * Information about a durable connection
- */
-export interface ConnectionInfo {
-  /** Username (for username-based connections) */
-  username?: string;
-
-  /** Service FQN (for service-based connections) */
-  serviceFqn?: string;
-
-  /** UUID (for UUID-based connections) */
-  uuid?: string;
-}
-
-/**
- * Service information returned when service is published
- */
-export interface ServiceInfo {
-  /** Service ID */
-  serviceId: string;
-
-  /** Service UUID for discovery */
-  uuid: string;
-
-  /** Expiration timestamp */
-  expiresAt: number;
-}

src/event-emitter.ts

@@ -1,109 +0,0 @@
-/**
- * Type-safe EventEmitter implementation for browser and Node.js compatibility
- *
- * @template EventMap - A type mapping event names to their handler signatures
- *
- * @example
- * ```typescript
- * interface MyEvents {
- *   'data': (value: string) => void;
- *   'error': (error: Error) => void;
- *   'ready': () => void;
- * }
- *
- * class MyClass extends EventEmitter<MyEvents> {
- *   doSomething() {
- *     this.emit('data', 'hello'); // Type-safe!
- *     this.emit('error', new Error('oops')); // Type-safe!
- *     this.emit('ready'); // Type-safe!
- *   }
- * }
- *
- * const instance = new MyClass();
- * instance.on('data', (value) => {
- *   console.log(value.toUpperCase()); // 'value' is typed as string
- * });
- * ```
- */
-export class EventEmitter<EventMap extends Record<string, (...args: any[]) => void>> {
-  private events: Map<keyof EventMap, Set<Function>> = new Map();
-
-  /**
-   * Register an event listener
-   */
-  on<K extends keyof EventMap>(event: K, listener: EventMap[K]): this {
-    if (!this.events.has(event)) {
-      this.events.set(event, new Set());
-    }
-    this.events.get(event)!.add(listener);
-    return this;
-  }
-
-  /**
-   * Register a one-time event listener
-   */
-  once<K extends keyof EventMap>(event: K, listener: EventMap[K]): this {
-    const onceWrapper = (...args: Parameters<EventMap[K]>) => {
-      this.off(event, onceWrapper as EventMap[K]);
-      listener(...args);
-    };
-    return this.on(event, onceWrapper as EventMap[K]);
-  }
-
-  /**
-   * Remove an event listener
-   */
-  off<K extends keyof EventMap>(event: K, listener: EventMap[K]): this {
-    const listeners = this.events.get(event);
-    if (listeners) {
-      listeners.delete(listener);
-      if (listeners.size === 0) {
-        this.events.delete(event);
-      }
-    }
-    return this;
-  }
-
-  /**
-   * Emit an event
-   */
-  protected emit<K extends keyof EventMap>(
-    event: K,
-    ...args: Parameters<EventMap[K]>
-  ): boolean {
-    const listeners = this.events.get(event);
-    if (!listeners || listeners.size === 0) {
-      return false;
-    }
-
-    listeners.forEach(listener => {
-      try {
-        (listener as EventMap[K])(...args);
-      } catch (err) {
-        console.error(`Error in ${String(event)} event listener:`, err);
-      }
-    });
-
-    return true;
-  }
-
-  /**
-   * Remove all listeners for an event (or all events if not specified)
-   */
-  removeAllListeners<K extends keyof EventMap>(event?: K): this {
-    if (event !== undefined) {
-      this.events.delete(event);
-    } else {
-      this.events.clear();
-    }
-    return this;
-  }
-
-  /**
-   * Get listener count for an event
-   */
-  listenerCount<K extends keyof EventMap>(event: K): number {
-    const listeners = this.events.get(event);
-    return listeners ? listeners.size : 0;
-  }
-}

src/index.ts

@@ -1,36 +1,29 @@
 /**
  * @xtr-dev/rondevu-client
- * WebRTC peer signaling and discovery client with durable connections
+ * WebRTC peer signaling client
  */
 
-// Export main client class
-export { Rondevu } from './rondevu.js';
-export type { RondevuOptions } from './rondevu.js';
+export { Rondevu } from './rondevu.js'
+export { RondevuAPI } from './api.js'
+export { RondevuSignaler } from './rondevu-signaler.js'
 
-// Export authentication
-export { RondevuAuth } from './auth.js';
-export type { Credentials, FetchFunction } from './auth.js';
-
-// Export username API
-export { RondevuUsername } from './usernames.js';
-export type { UsernameClaimResult, UsernameCheckResult } from './usernames.js';
-
-// Export durable connection APIs
-export { DurableConnection } from './durable/connection.js';
-export { DurableChannel } from './durable/channel.js';
-export { DurableService } from './durable/service.js';
-
-// Export durable connection types
+// Export types
 export type {
-  DurableConnectionState,
-  DurableChannelState,
-  DurableConnectionConfig,
-  DurableChannelConfig,
-  DurableServiceConfig,
-  QueuedMessage,
-  DurableConnectionEvents,
-  DurableChannelEvents,
-  DurableServiceEvents,
-  ConnectionInfo,
-  ServiceInfo
-} from './durable/types.js';
+    Signaler,
+    Binnable,
+} from './types.js'
+
+export type {
+    Credentials,
+    Keypair,
+    OfferRequest,
+    Offer,
+    ServiceRequest,
+    Service,
+    IceCandidate,
+} from './api.js'
+
+export type { RondevuOptions, PublishServiceOptions } from './rondevu.js'
+
+export type { PollingConfig } from './rondevu-signaler.js'
+

src/offer-pool.ts

@@ -1,205 +0,0 @@
-import { RondevuOffers, Offer } from './offers.js';
-
-/**
- * Represents an offer that has been answered
- */
-export interface AnsweredOffer {
-  offerId: string;
-  answererId: string;
-  sdp: string; // Answer SDP
-  peerConnection: RTCPeerConnection; // Original peer connection
-  dataChannel?: RTCDataChannel; // Data channel created with offer
-  answeredAt: number;
-}
-
-/**
- * Configuration options for the offer pool
- */
-export interface OfferPoolOptions {
-  /** Number of simultaneous open offers to maintain */
-  poolSize: number;
-
-  /** Polling interval in milliseconds (default: 2000ms) */
-  pollingInterval?: number;
-
-  /** Callback invoked when an offer is answered */
-  onAnswered: (answer: AnsweredOffer) => Promise<void>;
-
-  /** Callback to create new offers when refilling the pool */
-  onRefill: (count: number) => Promise<{ offers: Offer[], peerConnections: RTCPeerConnection[], dataChannels: RTCDataChannel[] }>;
-
-  /** Error handler for pool operations */
-  onError: (error: Error, context: string) => void;
-}
-
-/**
- * Manages a pool of offers with automatic polling and refill
- *
- * The OfferPool maintains a configurable number of simultaneous offers,
- * polls for answers periodically, and automatically refills the pool
- * when offers are consumed.
- */
-export class OfferPool {
-  private offers: Map<string, Offer> = new Map();
-  private peerConnections: Map<string, RTCPeerConnection> = new Map();
-  private dataChannels: Map<string, RTCDataChannel> = new Map();
-  private polling: boolean = false;
-  private pollingTimer?: ReturnType<typeof setInterval>;
-  private lastPollTime: number = 0;
-  private readonly pollingInterval: number;
-
-  constructor(
-    private offersApi: RondevuOffers,
-    private options: OfferPoolOptions
-  ) {
-    this.pollingInterval = options.pollingInterval || 2000;
-  }
-
-  /**
-   * Add offers to the pool with their peer connections and data channels
-   */
-  async addOffers(offers: Offer[], peerConnections?: RTCPeerConnection[], dataChannels?: RTCDataChannel[]): Promise<void> {
-    for (let i = 0; i < offers.length; i++) {
-      const offer = offers[i];
-      this.offers.set(offer.id, offer);
-      if (peerConnections && peerConnections[i]) {
-        this.peerConnections.set(offer.id, peerConnections[i]);
-      }
-      if (dataChannels && dataChannels[i]) {
-        this.dataChannels.set(offer.id, dataChannels[i]);
-      }
-    }
-  }
-
-  /**
-   * Start polling for answers
-   */
-  async start(): Promise<void> {
-    if (this.polling) {
-      return;
-    }
-
-    this.polling = true;
-
-    // Do an immediate poll
-    await this.poll().catch((error) => {
-      this.options.onError(error, 'initial-poll');
-    });
-
-    // Start polling interval
-    this.pollingTimer = setInterval(async () => {
-      if (this.polling) {
-        await this.poll().catch((error) => {
-          this.options.onError(error, 'poll');
-        });
-      }
-    }, this.pollingInterval);
-  }
-
-  /**
-   * Stop polling for answers
-   */
-  async stop(): Promise<void> {
-    this.polling = false;
-
-    if (this.pollingTimer) {
-      clearInterval(this.pollingTimer);
-      this.pollingTimer = undefined;
-    }
-  }
-
-  /**
-   * Poll for answers and refill the pool if needed
-   */
-  private async poll(): Promise<void> {
-    try {
-      // Get all answers from server
-      const answers = await this.offersApi.getAnswers();
-
-      // Filter for our pool's offers
-      const myAnswers = answers.filter(a => this.offers.has(a.offerId));
-
-      // Process each answer
-      for (const answer of myAnswers) {
-        // Get the original offer, peer connection, and data channel
-        const offer = this.offers.get(answer.offerId);
-        const pc = this.peerConnections.get(answer.offerId);
-        const channel = this.dataChannels.get(answer.offerId);
-
-        if (!offer || !pc) {
-          continue; // Offer or peer connection already consumed, skip
-        }
-
-        // Remove from pool BEFORE processing to prevent duplicate processing
-        this.offers.delete(answer.offerId);
-        this.peerConnections.delete(answer.offerId);
-        this.dataChannels.delete(answer.offerId);
-
-        // Notify ServicePool with answer, original peer connection, and data channel
-        await this.options.onAnswered({
-          offerId: answer.offerId,
-          answererId: answer.answererId,
-          sdp: answer.sdp,
-          peerConnection: pc,
-          dataChannel: channel,
-          answeredAt: answer.answeredAt
-        });
-      }
-
-      // Immediate refill if below pool size
-      if (this.offers.size < this.options.poolSize) {
-        const needed = this.options.poolSize - this.offers.size;
-
-        try {
-          const result = await this.options.onRefill(needed);
-          await this.addOffers(result.offers, result.peerConnections, result.dataChannels);
-        } catch (refillError) {
-          this.options.onError(
-            refillError as Error,
-            'refill'
-          );
-        }
-      }
-
-      this.lastPollTime = Date.now();
-    } catch (error) {
-      // Don't crash the pool on errors - let error handler deal with it
-      this.options.onError(error as Error, 'poll');
-    }
-  }
-
-  /**
-   * Get the current number of active offers in the pool
-   */
-  getActiveOfferCount(): number {
-    return this.offers.size;
-  }
-
-  /**
-   * Get all active offer IDs
-   */
-  getActiveOfferIds(): string[] {
-    return Array.from(this.offers.keys());
-  }
-
-  /**
-   * Get all active peer connections
-   */
-  getActivePeerConnections(): RTCPeerConnection[] {
-    return Array.from(this.peerConnections.values());
-  }
-
-  /**
-   * Get the last poll timestamp
-   */
-  getLastPollTime(): number {
-    return this.lastPollTime;
-  }
-
-  /**
-   * Check if the pool is currently polling
-   */
-  isPolling(): boolean {
-    return this.polling;
-  }
-}

src/offers.ts

@@ -1,321 +0,0 @@
-import { Credentials, FetchFunction } from './auth.js';
-import { RondevuAuth } from './auth.js';
-
-// Declare Buffer for Node.js compatibility
-declare const Buffer: any;
-
-export interface CreateOfferRequest {
-  sdp: string;
-  topics: string[];
-  ttl?: number;
-  secret?: string;
-  info?: string;
-}
-
-export interface Offer {
-  id: string;
-  peerId: string;
-  sdp: string;
-  topics: string[];
-  createdAt?: number;
-  expiresAt: number;
-  lastSeen: number;
-  secret?: string;
-  hasSecret?: boolean;
-  info?: string;
-  answererPeerId?: string;
-  answerSdp?: string;
-  answeredAt?: number;
-}
-
-export interface IceCandidate {
-  candidate: any; // Full candidate object as plain JSON - don't enforce structure
-  peerId: string;
-  role: 'offerer' | 'answerer';
-  createdAt: number;
-}
-
-export interface TopicInfo {
-  topic: string;
-  activePeers: number;
-}
-
-export class RondevuOffers {
-  private fetchFn: FetchFunction;
-
-  constructor(
-    private baseUrl: string,
-    private credentials: Credentials,
-    fetchFn?: FetchFunction
-  ) {
-    // Use provided fetch or fall back to global fetch
-    this.fetchFn = fetchFn || ((...args) => {
-      if (typeof globalThis.fetch === 'function') {
-        return globalThis.fetch(...args);
-      }
-      throw new Error(
-        'fetch is not available. Please provide a fetch implementation in the constructor options.'
-      );
-    });
-  }
-
-  /**
-   * Create one or more offers
-   */
-  async create(offers: CreateOfferRequest[]): Promise<Offer[]> {
-    const response = await this.fetchFn(`${this.baseUrl}/offers`, {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-        Authorization: RondevuAuth.createAuthHeader(this.credentials),
-      },
-      body: JSON.stringify({ offers }),
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to create offers: ${error.error || response.statusText}`);
-    }
-
-    const data = await response.json();
-    return data.offers;
-  }
-
-  /**
-   * Find offers by topic with optional bloom filter
-   */
-  async findByTopic(
-    topic: string,
-    options?: {
-      bloomFilter?: Uint8Array;
-      limit?: number;
-    }
-  ): Promise<Offer[]> {
-    const params = new URLSearchParams();
-
-    if (options?.bloomFilter) {
-      // Convert to base64
-      const binaryString = String.fromCharCode(...Array.from(options.bloomFilter));
-      const base64 = typeof btoa !== 'undefined'
-        ? btoa(binaryString)
-        : (typeof Buffer !== 'undefined' ? Buffer.from(options.bloomFilter).toString('base64') : '');
-      params.set('bloom', base64);
-    }
-
-    if (options?.limit) {
-      params.set('limit', options.limit.toString());
-    }
-
-    const url = `${this.baseUrl}/offers/by-topic/${encodeURIComponent(topic)}${
-      params.toString() ? '?' + params.toString() : ''
-    }`;
-
-    const response = await this.fetchFn(url, {
-      method: 'GET',
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to find offers: ${error.error || response.statusText}`);
-    }
-
-    const data = await response.json();
-    return data.offers;
-  }
-
-  /**
-   * Get all offers from a specific peer
-   */
-  async getByPeerId(peerId: string): Promise<{
-    offers: Offer[];
-    topics: string[];
-  }> {
-    const response = await this.fetchFn(`${this.baseUrl}/peers/${encodeURIComponent(peerId)}/offers`, {
-      method: 'GET',
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to get peer offers: ${error.error || response.statusText}`);
-    }
-
-    return await response.json();
-  }
-
-  /**
-   * Get topics with active peer counts (paginated)
-   */
-  async getTopics(options?: {
-    limit?: number;
-    offset?: number;
-    startsWith?: string;
-  }): Promise<{
-    topics: TopicInfo[];
-    total: number;
-    limit: number;
-    offset: number;
-    startsWith?: string;
-  }> {
-    const params = new URLSearchParams();
-
-    if (options?.limit) {
-      params.set('limit', options.limit.toString());
-    }
-
-    if (options?.offset) {
-      params.set('offset', options.offset.toString());
-    }
-
-    if (options?.startsWith) {
-      params.set('startsWith', options.startsWith);
-    }
-
-    const url = `${this.baseUrl}/topics${
-      params.toString() ? '?' + params.toString() : ''
-    }`;
-
-    const response = await this.fetchFn(url, {
-      method: 'GET',
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to get topics: ${error.error || response.statusText}`);
-    }
-
-    return await response.json();
-  }
-
-  /**
-   * Get own offers
-   */
-  async getMine(): Promise<Offer[]> {
-    const response = await this.fetchFn(`${this.baseUrl}/offers/mine`, {
-      method: 'GET',
-      headers: {
-        Authorization: RondevuAuth.createAuthHeader(this.credentials),
-      },
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to get own offers: ${error.error || response.statusText}`);
-    }
-
-    const data = await response.json();
-    return data.offers;
-  }
-
-  /**
-   * Delete an offer
-   */
-  async delete(offerId: string): Promise<void> {
-    const response = await this.fetchFn(`${this.baseUrl}/offers/${encodeURIComponent(offerId)}`, {
-      method: 'DELETE',
-      headers: {
-        Authorization: RondevuAuth.createAuthHeader(this.credentials),
-      },
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to delete offer: ${error.error || response.statusText}`);
-    }
-  }
-
-  /**
-   * Answer an offer
-   */
-  async answer(offerId: string, sdp: string, secret?: string): Promise<void> {
-    const response = await this.fetchFn(`${this.baseUrl}/offers/${encodeURIComponent(offerId)}/answer`, {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-        Authorization: RondevuAuth.createAuthHeader(this.credentials),
-      },
-      body: JSON.stringify({ sdp, secret }),
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to answer offer: ${error.error || response.statusText}`);
-    }
-  }
-
-  /**
-   * Get answers to your offers
-   */
-  async getAnswers(): Promise<Array<{
-    offerId: string;
-    answererId: string;
-    sdp: string;
-    answeredAt: number;
-    topics: string[];
-  }>> {
-    const response = await this.fetchFn(`${this.baseUrl}/offers/answers`, {
-      method: 'GET',
-      headers: {
-        Authorization: RondevuAuth.createAuthHeader(this.credentials),
-      },
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to get answers: ${error.error || response.statusText}`);
-    }
-
-    const data = await response.json();
-    return data.answers;
-  }
-
-  /**
-   * Post ICE candidates for an offer
-   */
-  async addIceCandidates(
-    offerId: string,
-    candidates: any[]
-  ): Promise<void> {
-    const response = await this.fetchFn(`${this.baseUrl}/offers/${encodeURIComponent(offerId)}/ice-candidates`, {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-        Authorization: RondevuAuth.createAuthHeader(this.credentials),
-      },
-      body: JSON.stringify({ candidates }),
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to add ICE candidates: ${error.error || response.statusText}`);
-    }
-  }
-
-  /**
-   * Get ICE candidates for an offer
-   */
-  async getIceCandidates(offerId: string, since?: number): Promise<IceCandidate[]> {
-    const params = new URLSearchParams();
-    if (since !== undefined) {
-      params.set('since', since.toString());
-    }
-
-    const url = `${this.baseUrl}/offers/${encodeURIComponent(offerId)}/ice-candidates${
-      params.toString() ? '?' + params.toString() : ''
-    }`;
-
-    const response = await this.fetchFn(url, {
-      method: 'GET',
-      headers: {
-        Authorization: RondevuAuth.createAuthHeader(this.credentials),
-      },
-    });
-
-    if (!response.ok) {
-      const error = await response.json().catch(() => ({ error: 'Unknown error' }));
-      throw new Error(`Failed to get ICE candidates: ${error.error || response.statusText}`);
-    }
-
-    const data = await response.json();
-    return data.candidates;
-  }
-}

src/peer/answering-state.ts

@@ -1,49 +0,0 @@
-import { PeerState } from './state.js';
-import type { PeerOptions } from './types.js';
-import type RondevuPeer from './index.js';
-
-/**
- * Answering an offer and sending to server
- */
-export class AnsweringState extends PeerState {
-  constructor(peer: RondevuPeer) {
-    super(peer);
-  }
-
-  get name() { return 'answering'; }
-
-  async answer(offerId: string, offerSdp: string, options: PeerOptions): Promise<void> {
-    try {
-      this.peer.role = 'answerer';
-      this.peer.offerId = offerId;
-
-      // Set remote description
-      await this.peer.pc.setRemoteDescription({
-        type: 'offer',
-        sdp: offerSdp
-      });
-
-      // Create answer
-      const answer = await this.peer.pc.createAnswer();
-
-      // Send answer to server BEFORE setLocalDescription
-      // This registers us as the answerer so ICE candidates will be accepted
-      await this.peer.offersApi.answer(offerId, answer.sdp!, options.secret);
-
-      // Enable trickle ICE - set up handler before ICE gathering starts
-      this.setupIceCandidateHandler();
-
-      // Set local description - ICE gathering starts here
-      // Server already knows we're the answerer, so candidates will be accepted
-      await this.peer.pc.setLocalDescription(answer);
-
-      // Transition to exchanging ICE
-      const { ExchangingIceState } = await import('./exchanging-ice-state.js');
-      this.peer.setState(new ExchangingIceState(this.peer, offerId, options));
-    } catch (error) {
-      const { FailedState } = await import('./failed-state.js');
-      this.peer.setState(new FailedState(this.peer, error as Error));
-      throw error;
-    }
-  }
-}

src/peer/closed-state.ts

@@ -1,12 +0,0 @@
-import { PeerState } from './state.js';
-
-/**
- * Closed state - connection has been terminated
- */
-export class ClosedState extends PeerState {
-  get name() { return 'closed'; }
-
-  cleanup(): void {
-    this.peer.pc.close();
-  }
-}

src/peer/connected-state.ts

@@ -1,13 +0,0 @@
-import { PeerState } from './state.js';
-
-/**
- * Connected state - peer connection is established
- */
-export class ConnectedState extends PeerState {
-  get name() { return 'connected'; }
-
-  cleanup(): void {
-    // Keep connection alive, but stop any polling
-    // The peer connection will handle disconnects via onconnectionstatechange
-  }
-}

src/peer/creating-offer-state.ts

@@ -1,57 +0,0 @@
-import { PeerState } from './state.js';
-import type { PeerOptions } from './types.js';
-import type RondevuPeer from './index.js';
-
-/**
- * Creating offer and sending to server
- */
-export class CreatingOfferState extends PeerState {
-  constructor(peer: RondevuPeer, private options: PeerOptions) {
-    super(peer);
-  }
-
-  get name() { return 'creating-offer'; }
-
-  async createOffer(options: PeerOptions): Promise<string> {
-    try {
-      this.peer.role = 'offerer';
-
-      // Create data channel if requested
-      if (options.createDataChannel !== false) {
-        const channel = this.peer.pc.createDataChannel(
-          options.dataChannelLabel || 'data'
-        );
-        this.peer.emitEvent('datachannel', channel);
-      }
-
-      // Enable trickle ICE - set up handler before ICE gathering starts
-      // Handler will check this.peer.offerId before sending
-      this.setupIceCandidateHandler();
-
-      // Create WebRTC offer
-      const offer = await this.peer.pc.createOffer();
-      await this.peer.pc.setLocalDescription(offer); // ICE gathering starts here
-
-      // Send offer to server immediately (don't wait for ICE)
-      const offers = await this.peer.offersApi.create([{
-        sdp: offer.sdp!,
-        topics: options.topics,
-        ttl: options.ttl || 300000,
-        secret: options.secret
-      }]);
-
-      const offerId = offers[0].id;
-      this.peer.offerId = offerId; // Now handler can send candidates
-
-      // Transition to waiting for answer
-      const { WaitingForAnswerState } = await import('./waiting-for-answer-state.js');
-      this.peer.setState(new WaitingForAnswerState(this.peer, offerId, options));
-
-      return offerId;
-    } catch (error) {
-      const { FailedState } = await import('./failed-state.js');
-      this.peer.setState(new FailedState(this.peer, error as Error));
-      throw error;
-    }
-  }
-}

src/peer/exchanging-ice-state.ts

@@ -1,83 +0,0 @@
-import { PeerState } from './state.js';
-import type { PeerOptions } from './types.js';
-import type RondevuPeer from './index.js';
-
-/**
- * Exchanging ICE candidates and waiting for connection
- */
-export class ExchangingIceState extends PeerState {
-  private pollingInterval?: ReturnType<typeof setInterval>;
-  private timeout?: ReturnType<typeof setTimeout>;
-  private lastIceTimestamp = 0;
-
-  constructor(
-    peer: RondevuPeer,
-    private offerId: string,
-    private options: PeerOptions
-  ) {
-    super(peer);
-    this.startPolling();
-  }
-
-  get name() { return 'exchanging-ice'; }
-
-  private startPolling(): void {
-    const connectionTimeout = this.options.timeouts?.iceConnection || 30000;
-
-    this.timeout = setTimeout(async () => {
-      this.cleanup();
-      const { FailedState } = await import('./failed-state.js');
-      this.peer.setState(new FailedState(
-        this.peer,
-        new Error('ICE connection timeout')
-      ));
-    }, connectionTimeout);
-
-    this.pollingInterval = setInterval(async () => {
-      try {
-        const candidates = await this.peer.offersApi.getIceCandidates(
-          this.offerId,
-          this.lastIceTimestamp
-        );
-
-        if (candidates.length > 0) {
-          console.log(`📥 Received ${candidates.length} remote ICE candidate(s)`);
-        }
-
-        for (const cand of candidates) {
-          if (cand.candidate && cand.candidate.candidate && cand.candidate.candidate !== '') {
-            const type = cand.candidate.candidate.includes('typ host') ? 'host' :
-                         cand.candidate.candidate.includes('typ srflx') ? 'srflx' :
-                         cand.candidate.candidate.includes('typ relay') ? 'relay' : 'unknown';
-            console.log(`🧊 Adding remote ${type} ICE candidate:`, cand.candidate.candidate);
-            try {
-              await this.peer.pc.addIceCandidate(new this.peer.RTCIceCandidate(cand.candidate));
-              console.log(`✅ Added remote ${type} ICE candidate`);
-              this.lastIceTimestamp = cand.createdAt;
-            } catch (err) {
-              console.warn(`⚠️ Failed to add remote ${type} ICE candidate:`, err);
-              this.lastIceTimestamp = cand.createdAt;
-            }
-          } else {
-            this.lastIceTimestamp = cand.createdAt;
-          }
-        }
-      } catch (err) {
-        console.error('❌ Error polling for ICE candidates:', err);
-        if (err instanceof Error && err.message.includes('not found')) {
-          this.cleanup();
-          const { FailedState } = await import('./failed-state.js');
-          this.peer.setState(new FailedState(
-            this.peer,
-            new Error('Offer expired or not found')
-          ));
-        }
-      }
-    }, 1000);
-  }
-
-  cleanup(): void {
-    if (this.pollingInterval) clearInterval(this.pollingInterval);
-    if (this.timeout) clearTimeout(this.timeout);
-  }
-}

src/peer/failed-state.ts

@@ -1,18 +0,0 @@
-import { PeerState } from './state.js';
-
-/**
- * Failed state - connection attempt failed
- */
-export class FailedState extends PeerState {
-  constructor(peer: any, private error: Error) {
-    super(peer);
-    peer.emitEvent('failed', error);
-  }
-
-  get name() { return 'failed'; }
-
-  cleanup(): void {
-    // Connection is failed, clean up resources
-    this.peer.pc.close();
-  }
-}

src/peer/idle-state.ts

@@ -1,18 +0,0 @@
-import { PeerState } from './state.js';
-import type { PeerOptions } from './types.js';
-
-export class IdleState extends PeerState {
-  get name() { return 'idle'; }
-
-  async createOffer(options: PeerOptions): Promise<string> {
-    const { CreatingOfferState } = await import('./creating-offer-state.js');
-    this.peer.setState(new CreatingOfferState(this.peer, options));
-    return this.peer.state.createOffer(options);
-  }
-
-  async answer(offerId: string, offerSdp: string, options: PeerOptions): Promise<void> {
-    const { AnsweringState } = await import('./answering-state.js');
-    this.peer.setState(new AnsweringState(this.peer));
-    return this.peer.state.answer(offerId, offerSdp, options);
-  }
-}

src/peer/index.ts

@@ -1,237 +0,0 @@
-import { RondevuOffers } from '../offers.js';
-import { EventEmitter } from '../event-emitter.js';
-import type { PeerOptions, PeerEvents } from './types.js';
-import { PeerState } from './state.js';
-import { IdleState } from './idle-state.js';
-import { CreatingOfferState } from './creating-offer-state.js';
-import { WaitingForAnswerState } from './waiting-for-answer-state.js';
-import { AnsweringState } from './answering-state.js';
-import { ExchangingIceState } from './exchanging-ice-state.js';
-import { ConnectedState } from './connected-state.js';
-import { FailedState } from './failed-state.js';
-import { ClosedState } from './closed-state.js';
-
-// Re-export types for external consumers
-export type { PeerTimeouts, PeerOptions, PeerEvents } from './types.js';
-
-/**
- * High-level WebRTC peer connection manager with state-based lifecycle
- * Handles offer/answer exchange, ICE candidates, timeouts, and error recovery
- */
-export default class RondevuPeer extends EventEmitter<PeerEvents> {
-  pc: RTCPeerConnection;
-  offersApi: RondevuOffers;
-  offerId?: string;
-  role?: 'offerer' | 'answerer';
-
-  // WebRTC polyfills for Node.js compatibility
-  RTCPeerConnection: typeof RTCPeerConnection;
-  RTCSessionDescription: typeof RTCSessionDescription;
-  RTCIceCandidate: typeof RTCIceCandidate;
-
-  private _state: PeerState;
-
-  // Event handler references for cleanup
-  private connectionStateChangeHandler?: () => void;
-  private dataChannelHandler?: (event: RTCDataChannelEvent) => void;
-  private trackHandler?: (event: RTCTrackEvent) => void;
-  private iceCandidateErrorHandler?: (event: Event) => void;
-
-  /**
-   * Current connection state name
-   */
-  get stateName(): string {
-    return this._state.name;
-  }
-
-  /**
-   * Current state object (internal use)
-   */
-  get state(): PeerState {
-    return this._state;
-  }
-
-  /**
-   * RTCPeerConnection state
-   */
-  get connectionState(): RTCPeerConnectionState {
-    return this.pc.connectionState;
-  }
-
-  constructor(
-    offersApi: RondevuOffers,
-    rtcConfig: RTCConfiguration = {
-      iceServers: [
-        { urls: 'stun:stun.l.google.com:19302' },
-        { urls: 'stun:stun1.l.google.com:19302' }
-      ]
-    },
-    existingPeerConnection?: RTCPeerConnection,
-    rtcPeerConnection?: typeof RTCPeerConnection,
-    rtcSessionDescription?: typeof RTCSessionDescription,
-    rtcIceCandidate?: typeof RTCIceCandidate
-  ) {
-    super();
-    this.offersApi = offersApi;
-
-    // Use provided polyfills or fall back to globals
-    this.RTCPeerConnection = rtcPeerConnection || (typeof globalThis.RTCPeerConnection !== 'undefined'
-      ? globalThis.RTCPeerConnection
-      : (() => {
-          throw new Error('RTCPeerConnection is not available. Please provide it in the Rondevu constructor options for Node.js environments.');
-        }) as any);
-
-    this.RTCSessionDescription = rtcSessionDescription || (typeof globalThis.RTCSessionDescription !== 'undefined'
-      ? globalThis.RTCSessionDescription
-      : (() => {
-          throw new Error('RTCSessionDescription is not available. Please provide it in the Rondevu constructor options for Node.js environments.');
-        }) as any);
-
-    this.RTCIceCandidate = rtcIceCandidate || (typeof globalThis.RTCIceCandidate !== 'undefined'
-      ? globalThis.RTCIceCandidate
-      : (() => {
-          throw new Error('RTCIceCandidate is not available. Please provide it in the Rondevu constructor options for Node.js environments.');
-        }) as any);
-
-    // Use existing peer connection if provided, otherwise create new one
-    this.pc = existingPeerConnection || new this.RTCPeerConnection(rtcConfig);
-    this._state = new IdleState(this);
-
-    this.setupPeerConnection();
-  }
-
-  /**
-   * Set up peer connection event handlers
-   */
-  private setupPeerConnection(): void {
-    this.connectionStateChangeHandler = () => {
-      console.log(`🔌 Connection state changed: ${this.pc.connectionState}`);
-      switch (this.pc.connectionState) {
-        case 'connected':
-          console.log('✅ WebRTC connection established');
-          this.setState(new ConnectedState(this));
-          this.emitEvent('connected');
-          break;
-        case 'disconnected':
-          console.log('⚠️ WebRTC connection disconnected');
-          this.emitEvent('disconnected');
-          break;
-        case 'failed':
-          console.log('❌ WebRTC connection failed');
-          this.setState(new FailedState(this, new Error('Connection failed')));
-          break;
-        case 'closed':
-          console.log('🔒 WebRTC connection closed');
-          this.setState(new ClosedState(this));
-          this.emitEvent('disconnected');
-          break;
-      }
-    };
-    this.pc.addEventListener('connectionstatechange', this.connectionStateChangeHandler);
-
-    // Add ICE connection state logging
-    const iceConnectionStateHandler = () => {
-      console.log(`🧊 ICE connection state: ${this.pc.iceConnectionState}`);
-    };
-    this.pc.addEventListener('iceconnectionstatechange', iceConnectionStateHandler);
-
-    // Add ICE gathering state logging
-    const iceGatheringStateHandler = () => {
-      console.log(`🔍 ICE gathering state: ${this.pc.iceGatheringState}`);
-    };
-    this.pc.addEventListener('icegatheringstatechange', iceGatheringStateHandler);
-
-    this.dataChannelHandler = (event: RTCDataChannelEvent) => {
-      this.emitEvent('datachannel', event.channel);
-    };
-    this.pc.addEventListener('datachannel', this.dataChannelHandler);
-
-    this.trackHandler = (event: RTCTrackEvent) => {
-      this.emitEvent('track', event);
-    };
-    this.pc.addEventListener('track', this.trackHandler);
-
-    this.iceCandidateErrorHandler = (event: Event) => {
-      const iceError = event as RTCPeerConnectionIceErrorEvent;
-      console.error(`❌ ICE candidate error: ${iceError.errorText || 'Unknown error'}`, {
-        errorCode: iceError.errorCode,
-        url: iceError.url,
-        address: iceError.address,
-        port: iceError.port
-      });
-    };
-    this.pc.addEventListener('icecandidateerror', this.iceCandidateErrorHandler);
-  }
-
-  /**
-   * Set new state and emit state change event
-   */
-  setState(newState: PeerState): void {
-    this._state.cleanup();
-    this._state = newState;
-    this.emitEvent('state', newState.name);
-  }
-
-  /**
-   * Emit event (exposed for PeerState classes)
-   * @internal
-   */
-  emitEvent<K extends keyof PeerEvents>(
-    event: K,
-    ...args: Parameters<PeerEvents[K]>
-  ): void {
-    this.emit(event, ...args);
-  }
-
-  /**
-   * Create an offer and advertise on topics
-   */
-  async createOffer(options: PeerOptions): Promise<string> {
-    return this._state.createOffer(options);
-  }
-
-  /**
-   * Answer an existing offer
-   */
-  async answer(offerId: string, offerSdp: string, options: PeerOptions): Promise<void> {
-    return this._state.answer(offerId, offerSdp, options);
-  }
-
-  /**
-   * Add a media track to the connection
-   */
-  addTrack(track: MediaStreamTrack, ...streams: MediaStream[]): RTCRtpSender {
-    return this.pc.addTrack(track, ...streams);
-  }
-
-  /**
-   * Create a data channel for sending and receiving arbitrary data
-   * This should typically be called by the offerer before creating the offer
-   * The answerer will receive the channel via the 'datachannel' event
-   */
-  createDataChannel(label: string, options?: RTCDataChannelInit): RTCDataChannel {
-    return this.pc.createDataChannel(label, options);
-  }
-
-  /**
-   * Close the connection and clean up
-   */
-  async close(): Promise<void> {
-    // Remove RTCPeerConnection event listeners
-    if (this.connectionStateChangeHandler) {
-      this.pc.removeEventListener('connectionstatechange', this.connectionStateChangeHandler);
-    }
-    if (this.dataChannelHandler) {
-      this.pc.removeEventListener('datachannel', this.dataChannelHandler);
-    }
-    if (this.trackHandler) {
-      this.pc.removeEventListener('track', this.trackHandler);
-    }
-    if (this.iceCandidateErrorHandler) {
-      this.pc.removeEventListener('icecandidateerror', this.iceCandidateErrorHandler);
-    }
-
-    await this._state.close();
-    this.removeAllListeners();
-  }
-}

src/peer/state.ts

@@ -1,73 +0,0 @@
-import type { PeerOptions } from './types.js';
-import type RondevuPeer from './index.js';
-
-/**
- * Base class for peer connection states
- * Implements the State pattern for managing WebRTC connection lifecycle
- */
-export abstract class PeerState {
-  protected iceCandidateHandler?: (event: RTCPeerConnectionIceEvent) => void;
-
-  constructor(protected peer: RondevuPeer) {}
-
-  abstract get name(): string;
-
-  async createOffer(options: PeerOptions): Promise<string> {
-    throw new Error(`Cannot create offer in ${this.name} state`);
-  }
-
-  async answer(offerId: string, offerSdp: string, options: PeerOptions): Promise<void> {
-    throw new Error(`Cannot answer in ${this.name} state`);
-  }
-
-  async handleAnswer(sdp: string): Promise<void> {
-    throw new Error(`Cannot handle answer in ${this.name} state`);
-  }
-
-  async handleIceCandidate(candidate: any): Promise<void> {
-    // ICE candidates can arrive in multiple states, so default is to add them
-    if (this.peer.pc.remoteDescription) {
-      await this.peer.pc.addIceCandidate(new this.peer.RTCIceCandidate(candidate));
-    }
-  }
-
-  /**
-   * Setup trickle ICE candidate handler
-   * Sends local ICE candidates to server as they are discovered
-   */
-  protected setupIceCandidateHandler(): void {
-    this.iceCandidateHandler = async (event: RTCPeerConnectionIceEvent) => {
-      if (event.candidate && this.peer.offerId) {
-        const candidateData = event.candidate.toJSON();
-        if (candidateData.candidate && candidateData.candidate !== '') {
-          const type = candidateData.candidate.includes('typ host') ? 'host' :
-                       candidateData.candidate.includes('typ srflx') ? 'srflx' :
-                       candidateData.candidate.includes('typ relay') ? 'relay' : 'unknown';
-          console.log(`🧊 Generated ${type} ICE candidate:`, candidateData.candidate);
-          try {
-            await this.peer.offersApi.addIceCandidates(this.peer.offerId, [candidateData]);
-            console.log(`✅ Sent ${type} ICE candidate to server`);
-          } catch (err) {
-            console.error(`❌ Error sending ${type} ICE candidate:`, err);
-          }
-        }
-      } else if (!event.candidate) {
-        console.log('🧊 ICE gathering complete (null candidate)');
-      }
-    };
-    this.peer.pc.addEventListener('icecandidate', this.iceCandidateHandler);
-  }
-
-  cleanup(): void {
-    // Clean up ICE candidate handler if it exists
-    if (this.iceCandidateHandler) {
-      this.peer.pc.removeEventListener('icecandidate', this.iceCandidateHandler);
-    }
-  }
-
-  async close(): Promise<void> {
-    this.cleanup();
-    const { ClosedState } = await import('./closed-state.js');
-    this.peer.setState(new ClosedState(this.peer));
-  }
-}

src/peer/types.ts

@@ -1,45 +0,0 @@
-/**
- * Timeout configurations for different connection phases
- */
-export interface PeerTimeouts {
-  /** Timeout for ICE gathering (default: 10000ms) */
-  iceGathering?: number;
-  /** Timeout for waiting for answer (default: 30000ms) */
-  waitingForAnswer?: number;
-  /** Timeout for creating answer (default: 10000ms) */
-  creatingAnswer?: number;
-  /** Timeout for ICE connection (default: 30000ms) */
-  iceConnection?: number;
-}
-
-/**
- * Options for creating a peer connection
- */
-export interface PeerOptions {
-  /** RTCConfiguration for the peer connection */
-  rtcConfig?: RTCConfiguration;
-  /** Topics to advertise this connection under */
-  topics: string[];
-  /** How long the offer should live (milliseconds) */
-  ttl?: number;
-  /** Optional secret to protect the offer (max 128 characters) */
-  secret?: string;
-  /** Whether to create a data channel automatically (for offerer) */
-  createDataChannel?: boolean;
-  /** Label for the automatically created data channel */
-  dataChannelLabel?: string;
-  /** Timeout configurations */
-  timeouts?: PeerTimeouts;
-}
-
-/**
- * Events emitted by RondevuPeer
- */
-export interface PeerEvents extends Record<string, (...args: any[]) => void> {
-  'state': (state: string) => void;
-  'connected': () => void;
-  'disconnected': () => void;
-  'failed': (error: Error) => void;
-  'datachannel': (channel: RTCDataChannel) => void;
-  'track': (event: RTCTrackEvent) => void;
-}

src/peer/waiting-for-answer-state.ts

@@ -1,78 +0,0 @@
-import { PeerState } from './state.js';
-import type { PeerOptions } from './types.js';
-import type RondevuPeer from './index.js';
-
-/**
- * Waiting for answer from another peer
- */
-export class WaitingForAnswerState extends PeerState {
-  private pollingInterval?: ReturnType<typeof setInterval>;
-  private timeout?: ReturnType<typeof setTimeout>;
-
-  constructor(
-    peer: RondevuPeer,
-    private offerId: string,
-    private options: PeerOptions
-  ) {
-    super(peer);
-    this.startPolling();
-  }
-
-  get name() { return 'waiting-for-answer'; }
-
-  private startPolling(): void {
-    const answerTimeout = this.options.timeouts?.waitingForAnswer || 30000;
-
-    this.timeout = setTimeout(async () => {
-      this.cleanup();
-      const { FailedState } = await import('./failed-state.js');
-      this.peer.setState(new FailedState(
-        this.peer,
-        new Error('Timeout waiting for answer')
-      ));
-    }, answerTimeout);
-
-    this.pollingInterval = setInterval(async () => {
-      try {
-        const answers = await this.peer.offersApi.getAnswers();
-        const myAnswer = answers.find((a: any) => a.offerId === this.offerId);
-
-        if (myAnswer) {
-          this.cleanup();
-          await this.handleAnswer(myAnswer.sdp);
-        }
-      } catch (err) {
-        console.error('Error polling for answers:', err);
-        if (err instanceof Error && err.message.includes('not found')) {
-          this.cleanup();
-          const { FailedState } = await import('./failed-state.js');
-          this.peer.setState(new FailedState(
-            this.peer,
-            new Error('Offer expired or not found')
-          ));
-        }
-      }
-    }, 2000);
-  }
-
-  async handleAnswer(sdp: string): Promise<void> {
-    try {
-      await this.peer.pc.setRemoteDescription({
-        type: 'answer',
-        sdp
-      });
-
-      // Transition to exchanging ICE
-      const { ExchangingIceState } = await import('./exchanging-ice-state.js');
-      this.peer.setState(new ExchangingIceState(this.peer, this.offerId, this.options));
-    } catch (error) {
-      const { FailedState } = await import('./failed-state.js');
-      this.peer.setState(new FailedState(this.peer, error as Error));
-    }
-  }
-
-  cleanup(): void {
-    if (this.pollingInterval) clearInterval(this.pollingInterval);
-    if (this.timeout) clearTimeout(this.timeout);
-  }
-}

src/rondevu-signaler.ts

@@ -0,0 +1,442 @@
+import { Signaler, Binnable } from './types.js'
+import { Rondevu } from './rondevu.js'
+
+export interface PollingConfig {
+    initialInterval?: number     // Default: 500ms
+    maxInterval?: number          // Default: 5000ms
+    backoffMultiplier?: number    // Default: 1.5
+    maxRetries?: number           // Default: 50 (50 seconds max)
+    jitter?: boolean              // Default: true
+}
+
+/**
+ * RondevuSignaler - Handles WebRTC signaling via Rondevu service
+ *
+ * Manages offer/answer exchange and ICE candidate polling for establishing
+ * WebRTC connections through the Rondevu signaling server.
+ *
+ * Supports configurable polling with exponential backoff and jitter to reduce
+ * server load and prevent thundering herd issues.
+ *
+ * @example
+ * ```typescript
+ * const signaler = new RondevuSignaler(
+ *   rondevuService,
+ *   'chat.app@1.0.0',
+ *   'peer-username',
+ *   { initialInterval: 500, maxInterval: 5000, jitter: true }
+ * )
+ *
+ * // For offerer:
+ * await signaler.setOffer(offer)
+ * signaler.addAnswerListener(answer => {
+ *   // Handle remote answer
+ * })
+ *
+ * // For answerer:
+ * signaler.addOfferListener(offer => {
+ *   // Handle remote offer
+ * })
+ * await signaler.setAnswer(answer)
+ * ```
+ */
+export class RondevuSignaler implements Signaler {
+    private offerId: string | null = null
+    private serviceFqn: string | null = null
+    private offerListeners: Array<(offer: RTCSessionDescriptionInit) => void> = []
+    private answerListeners: Array<(answer: RTCSessionDescriptionInit) => void> = []
+    private iceListeners: Array<(candidate: RTCIceCandidate) => void> = []
+    private answerPollingTimeout: ReturnType<typeof setTimeout> | null = null
+    private icePollingTimeout: ReturnType<typeof setTimeout> | null = null
+    private lastIceTimestamp = 0
+    private isPolling = false
+    private pollingConfig: Required<PollingConfig>
+
+    constructor(
+        private readonly rondevu: Rondevu,
+        private readonly service: string,
+        private readonly host?: string,
+        pollingConfig?: PollingConfig
+    ) {
+        this.pollingConfig = {
+            initialInterval: pollingConfig?.initialInterval ?? 500,
+            maxInterval: pollingConfig?.maxInterval ?? 5000,
+            backoffMultiplier: pollingConfig?.backoffMultiplier ?? 1.5,
+            maxRetries: pollingConfig?.maxRetries ?? 50,
+            jitter: pollingConfig?.jitter ?? true
+        }
+    }
+
+    /**
+     * Publish an offer as a service
+     * Used by the offerer to make their offer available
+     */
+    async setOffer(offer: RTCSessionDescriptionInit): Promise<void> {
+        if (!offer.sdp) {
+            throw new Error('Offer SDP is required')
+        }
+
+        // Publish service with the offer SDP
+        const publishedService = await this.rondevu.publishService({
+            serviceFqn: this.service,
+            offers: [{ sdp: offer.sdp }],
+            ttl: 300000, // 5 minutes
+        })
+
+        // Get the first offer from the published service
+        if (!publishedService.offers || publishedService.offers.length === 0) {
+            throw new Error('No offers returned from service publication')
+        }
+
+        this.offerId = publishedService.offers[0].offerId
+        this.serviceFqn = publishedService.serviceFqn
+
+        // Start polling for answer
+        this.startAnswerPolling()
+
+        // Start polling for ICE candidates
+        this.startIcePolling()
+    }
+
+    /**
+     * Send an answer to the offerer
+     * Used by the answerer to respond to an offer
+     */
+    async setAnswer(answer: RTCSessionDescriptionInit): Promise<void> {
+        if (!answer.sdp) {
+            throw new Error('Answer SDP is required')
+        }
+
+        if (!this.serviceFqn || !this.offerId) {
+            throw new Error('No service FQN or offer ID available. Must receive offer first.')
+        }
+
+        // Send answer to the service
+        const result = await this.rondevu.getAPI().postOfferAnswer(this.serviceFqn, this.offerId, answer.sdp)
+        this.offerId = result.offerId
+
+        // Start polling for ICE candidates
+        this.startIcePolling()
+    }
+
+    /**
+     * Listen for incoming offers
+     * Used by the answerer to receive offers from the offerer
+     */
+    addOfferListener(callback: (offer: RTCSessionDescriptionInit) => void): Binnable {
+        this.offerListeners.push(callback)
+
+        // If we have a host, start searching for their service
+        if (this.host && !this.isPolling) {
+            this.searchForOffer()
+        }
+
+        // Return cleanup function
+        return () => {
+            const index = this.offerListeners.indexOf(callback)
+            if (index > -1) {
+                this.offerListeners.splice(index, 1)
+            }
+        }
+    }
+
+    /**
+     * Listen for incoming answers
+     * Used by the offerer to receive the answer from the answerer
+     */
+    addAnswerListener(callback: (answer: RTCSessionDescriptionInit) => void): Binnable {
+        this.answerListeners.push(callback)
+
+        // Return cleanup function
+        return () => {
+            const index = this.answerListeners.indexOf(callback)
+            if (index > -1) {
+                this.answerListeners.splice(index, 1)
+            }
+        }
+    }
+
+    /**
+     * Send an ICE candidate to the remote peer
+     */
+    async addIceCandidate(candidate: RTCIceCandidate): Promise<void> {
+        if (!this.serviceFqn || !this.offerId) {
+            console.warn('Cannot send ICE candidate: no service FQN or offer ID')
+            return
+        }
+
+        const candidateData = candidate.toJSON()
+
+        // Skip empty candidates
+        if (!candidateData.candidate || candidateData.candidate === '') {
+            return
+        }
+
+        try {
+            await this.rondevu.getAPI().addOfferIceCandidates(
+                this.serviceFqn,
+                this.offerId,
+                [candidateData]
+            )
+        } catch (err) {
+            console.error('Failed to send ICE candidate:', err)
+        }
+    }
+
+    /**
+     * Listen for ICE candidates from the remote peer
+     */
+    addListener(callback: (candidate: RTCIceCandidate) => void): Binnable {
+        this.iceListeners.push(callback)
+
+        // Return cleanup function
+        return () => {
+            const index = this.iceListeners.indexOf(callback)
+            if (index > -1) {
+                this.iceListeners.splice(index, 1)
+            }
+        }
+    }
+
+    /**
+     * Search for an offer from the host
+     * Used by the answerer to find the offerer's service
+     */
+    private async searchForOffer(): Promise<void> {
+        if (!this.host) {
+            throw new Error('No host specified for offer search')
+        }
+
+        this.isPolling = true
+
+        try {
+            // Get service by FQN (service should include @username)
+            const serviceFqn = `${this.service}@${this.host}`
+            const serviceData = await this.rondevu.getAPI().getService(serviceFqn)
+
+            if (!serviceData) {
+                console.warn(`No service found for ${serviceFqn}`)
+                this.isPolling = false
+                return
+            }
+
+            // Store service details
+            this.offerId = serviceData.offerId
+            this.serviceFqn = serviceData.serviceFqn
+
+            // Notify offer listeners
+            const offer: RTCSessionDescriptionInit = {
+                type: 'offer',
+                sdp: serviceData.sdp,
+            }
+
+            this.offerListeners.forEach(listener => {
+                try {
+                    listener(offer)
+                } catch (err) {
+                    console.error('Offer listener error:', err)
+                }
+            })
+        } catch (err) {
+            console.error('Failed to search for offer:', err)
+            this.isPolling = false
+        }
+    }
+
+    /**
+     * Start polling for answer (offerer side) with exponential backoff
+     */
+    private startAnswerPolling(): void {
+        if (this.answerPollingTimeout || !this.serviceFqn || !this.offerId) {
+            return
+        }
+
+        let interval = this.pollingConfig.initialInterval
+        let retries = 0
+
+        const poll = async () => {
+            if (!this.serviceFqn || !this.offerId) {
+                this.stopAnswerPolling()
+                return
+            }
+
+            try {
+                const answer = await this.rondevu.getAPI().getOfferAnswer(this.serviceFqn, this.offerId)
+
+                if (answer && answer.sdp) {
+                    // Store offerId if we didn't have it yet
+                    if (!this.offerId) {
+                        this.offerId = answer.offerId
+                    }
+
+                    // Got answer - notify listeners and stop polling
+                    const answerDesc: RTCSessionDescriptionInit = {
+                        type: 'answer',
+                        sdp: answer.sdp,
+                    }
+
+                    this.answerListeners.forEach(listener => {
+                        try {
+                            listener(answerDesc)
+                        } catch (err) {
+                            console.error('Answer listener error:', err)
+                        }
+                    })
+
+                    // Stop polling once we get the answer
+                    this.stopAnswerPolling()
+                    return
+                }
+
+                // No answer yet - exponential backoff
+                retries++
+                if (retries > this.pollingConfig.maxRetries) {
+                    console.warn('Max retries reached for answer polling')
+                    this.stopAnswerPolling()
+                    return
+                }
+
+                interval = Math.min(
+                    interval * this.pollingConfig.backoffMultiplier,
+                    this.pollingConfig.maxInterval
+                )
+
+                // Add jitter to prevent thundering herd
+                const finalInterval = this.pollingConfig.jitter
+                    ? interval + Math.random() * 100
+                    : interval
+
+                this.answerPollingTimeout = setTimeout(poll, finalInterval)
+
+            } catch (err) {
+                // 404 is expected when answer isn't available yet
+                if (err instanceof Error && !err.message?.includes('404')) {
+                    console.error('Error polling for answer:', err)
+                }
+
+                // Retry with backoff
+                const finalInterval = this.pollingConfig.jitter
+                    ? interval + Math.random() * 100
+                    : interval
+                this.answerPollingTimeout = setTimeout(poll, finalInterval)
+            }
+        }
+
+        poll() // Start immediately
+    }
+
+    /**
+     * Stop polling for answer
+     */
+    private stopAnswerPolling(): void {
+        if (this.answerPollingTimeout) {
+            clearTimeout(this.answerPollingTimeout)
+            this.answerPollingTimeout = null
+        }
+    }
+
+    /**
+     * Start polling for ICE candidates with adaptive backoff
+     */
+    private startIcePolling(): void {
+        if (this.icePollingTimeout || !this.serviceFqn || !this.offerId) {
+            return
+        }
+
+        let interval = this.pollingConfig.initialInterval
+
+        const poll = async () => {
+            if (!this.serviceFqn || !this.offerId) {
+                this.stopIcePolling()
+                return
+            }
+
+            try {
+                const result = await this.rondevu
+                    .getAPI()
+                    .getOfferIceCandidates(this.serviceFqn, this.offerId, this.lastIceTimestamp)
+
+                let foundCandidates = false
+
+                for (const item of result.candidates) {
+                    if (item.candidate && item.candidate.candidate && item.candidate.candidate !== '') {
+                        foundCandidates = true
+                        try {
+                            const rtcCandidate = new RTCIceCandidate(item.candidate)
+
+                            this.iceListeners.forEach(listener => {
+                                try {
+                                    listener(rtcCandidate)
+                                } catch (err) {
+                                    console.error('ICE listener error:', err)
+                                }
+                            })
+
+                            this.lastIceTimestamp = item.createdAt
+                        } catch (err) {
+                            console.warn('Failed to process ICE candidate:', err)
+                            this.lastIceTimestamp = item.createdAt
+                        }
+                    } else {
+                        this.lastIceTimestamp = item.createdAt
+                    }
+                }
+
+                // If candidates found, reset interval to initial value
+                // Otherwise, increase interval with backoff
+                if (foundCandidates) {
+                    interval = this.pollingConfig.initialInterval
+                } else {
+                    interval = Math.min(
+                        interval * this.pollingConfig.backoffMultiplier,
+                        this.pollingConfig.maxInterval
+                    )
+                }
+
+                // Add jitter
+                const finalInterval = this.pollingConfig.jitter
+                    ? interval + Math.random() * 100
+                    : interval
+
+                this.icePollingTimeout = setTimeout(poll, finalInterval)
+
+            } catch (err) {
+                // 404/410 means offer expired, stop polling
+                if (err instanceof Error && (err.message?.includes('404') || err.message?.includes('410'))) {
+                    console.warn('Offer not found or expired, stopping ICE polling')
+                    this.stopIcePolling()
+                } else if (err instanceof Error && !err.message?.includes('404')) {
+                    console.error('Error polling for ICE candidates:', err)
+                    // Continue polling despite errors
+                    const finalInterval = this.pollingConfig.jitter
+                        ? interval + Math.random() * 100
+                        : interval
+                    this.icePollingTimeout = setTimeout(poll, finalInterval)
+                }
+            }
+        }
+
+        poll() // Start immediately
+    }
+
+    /**
+     * Stop polling for ICE candidates
+     */
+    private stopIcePolling(): void {
+        if (this.icePollingTimeout) {
+            clearTimeout(this.icePollingTimeout)
+            this.icePollingTimeout = null
+        }
+    }
+
+    /**
+     * Stop all polling and cleanup
+     */
+    dispose(): void {
+        this.stopAnswerPolling()
+        this.stopIcePolling()
+        this.offerListeners = []
+        this.answerListeners = []
+        this.iceListeners = []
+    }
+}

src/rondevu.ts

@@ -1,296 +1,335 @@
-import { RondevuAuth, Credentials, FetchFunction } from './auth.js';
-import { RondevuOffers } from './offers.js';
-import { RondevuUsername } from './usernames.js';
-import RondevuPeer from './peer/index.js';
-import { DurableService } from './durable/service.js';
-import { DurableConnection } from './durable/connection.js';
-import { DurableChannel } from './durable/channel.js';
-import type {
-  DurableServiceConfig,
-  DurableConnectionConfig,
-  ConnectionInfo
-} from './durable/types.js';
+import { RondevuAPI, Credentials, Keypair, Service, ServiceRequest, IceCandidate } from './api.js'
 
 export interface RondevuOptions {
-  /**
-   * Base URL of the Rondevu server
-   * @default 'https://api.ronde.vu'
-   */
-  baseUrl?: string;
-
-  /**
-   * Existing credentials (peerId + secret) to skip registration
-   */
-  credentials?: Credentials;
-
-  /**
-   * Custom fetch implementation for environments without native fetch
-   * (Node.js < 18, some Workers environments, etc.)
-   *
-   * @example Node.js
-   * ```typescript
-   * import fetch from 'node-fetch';
-   * const client = new Rondevu({ fetch });
-   * ```
-   */
-  fetch?: FetchFunction;
-
-  /**
-   * Custom RTCPeerConnection implementation for Node.js environments
-   * Required when using in Node.js with wrtc or similar polyfills
-   *
-   * @example Node.js with wrtc
-   * ```typescript
-   * import { RTCPeerConnection } from 'wrtc';
-   * const client = new Rondevu({ RTCPeerConnection });
-   * ```
-   */
-  RTCPeerConnection?: typeof RTCPeerConnection;
-
-  /**
-   * Custom RTCSessionDescription implementation for Node.js environments
-   * Required when using in Node.js with wrtc or similar polyfills
-   *
-   * @example Node.js with wrtc
-   * ```typescript
-   * import { RTCSessionDescription } from 'wrtc';
-   * const client = new Rondevu({ RTCSessionDescription });
-   * ```
-   */
-  RTCSessionDescription?: typeof RTCSessionDescription;
-
-  /**
-   * Custom RTCIceCandidate implementation for Node.js environments
-   * Required when using in Node.js with wrtc or similar polyfills
-   *
-   * @example Node.js with wrtc
-   * ```typescript
-   * import { RTCIceCandidate } from 'wrtc';
-   * const client = new Rondevu({ RTCIceCandidate });
-   * ```
-   */
-  RTCIceCandidate?: typeof RTCIceCandidate;
+    apiUrl: string
+    username: string
+    keypair?: Keypair
+    credentials?: Credentials
 }
 
+export interface PublishServiceOptions {
+    serviceFqn: string // Must include @username (e.g., "chat:1.0.0@alice")
+    offers: Array<{ sdp: string }>
+    ttl?: number
+}
+
+/**
+ * Rondevu - Complete WebRTC signaling client
+ *
+ * Provides a unified API for:
+ * - Username claiming with Ed25519 signatures
+ * - Service publishing with automatic signature generation
+ * - Service discovery (direct, random, paginated)
+ * - WebRTC signaling (offer/answer exchange, ICE relay)
+ * - Keypair management
+ *
+ * @example
+ * ```typescript
+ * // Initialize (generates keypair automatically)
+ * const rondevu = new Rondevu({
+ *   apiUrl: 'https://signal.example.com',
+ *   username: 'alice',
+ * })
+ *
+ * await rondevu.initialize()
+ *
+ * // Claim username (one time)
+ * await rondevu.claimUsername()
+ *
+ * // Publish a service
+ * const publishedService = await rondevu.publishService({
+ *   serviceFqn: 'chat:1.0.0@alice',
+ *   offers: [{ sdp: offerSdp }],
+ *   ttl: 300000,
+ * })
+ *
+ * // Discover a service
+ * const service = await rondevu.getService('chat:1.0.0@bob')
+ *
+ * // Post answer
+ * await rondevu.postOfferAnswer(service.serviceFqn, service.offerId, answerSdp)
+ * ```
+ */
 export class Rondevu {
-  readonly auth: RondevuAuth;
-  readonly usernames: RondevuUsername;
+    private readonly api: RondevuAPI
+    private readonly username: string
+    private keypair: Keypair | null = null
+    private usernameClaimed = false
 
-  private _offers?: RondevuOffers;
-  private credentials?: Credentials;
-  private baseUrl: string;
-  private fetchFn?: FetchFunction;
-  private rtcPeerConnection?: typeof RTCPeerConnection;
-  private rtcSessionDescription?: typeof RTCSessionDescription;
-  private rtcIceCandidate?: typeof RTCIceCandidate;
+    constructor(options: RondevuOptions) {
+        this.username = options.username
+        this.keypair = options.keypair || null
+        this.api = new RondevuAPI(options.apiUrl, options.credentials)
 
-  constructor(options: RondevuOptions = {}) {
-    this.baseUrl = options.baseUrl || 'https://api.ronde.vu';
-    this.fetchFn = options.fetch;
-    this.rtcPeerConnection = options.RTCPeerConnection;
-    this.rtcSessionDescription = options.RTCSessionDescription;
-    this.rtcIceCandidate = options.RTCIceCandidate;
-
-    this.auth = new RondevuAuth(this.baseUrl, this.fetchFn);
-    this.usernames = new RondevuUsername(this.baseUrl);
-
-    if (options.credentials) {
-      this.credentials = options.credentials;
-      this._offers = new RondevuOffers(this.baseUrl, this.credentials, this.fetchFn);
-    }
-  }
-
-  /**
-   * Get offers API (low-level access, requires authentication)
-   * For most use cases, use the durable connection APIs instead
-   */
-  get offers(): RondevuOffers {
-    if (!this._offers) {
-      throw new Error('Not authenticated. Call register() first or provide credentials.');
-    }
-    return this._offers;
-  }
-
-  /**
-   * Register and initialize authenticated client
-   * Generates a cryptographically random peer ID (128-bit)
-   */
-  async register(): Promise<Credentials> {
-    this.credentials = await this.auth.register();
-
-    // Create offers API instance
-    this._offers = new RondevuOffers(
-      this.baseUrl,
-      this.credentials,
-      this.fetchFn
-    );
-
-    return this.credentials;
-  }
-
-  /**
-   * Check if client is authenticated
-   */
-  isAuthenticated(): boolean {
-    return !!this.credentials;
-  }
-
-  /**
-   * Get current credentials
-   */
-  getCredentials(): Credentials | undefined {
-    return this.credentials;
-  }
-
-  /**
-   * Create a new WebRTC peer connection (requires authentication)
-   * This is a high-level helper that creates and manages WebRTC connections with state management
-   *
-   * @param rtcConfig Optional RTCConfiguration for the peer connection
-   * @returns RondevuPeer instance
-   */
-  createPeer(rtcConfig?: RTCConfiguration): RondevuPeer {
-    if (!this._offers) {
-      throw new Error('Not authenticated. Call register() first or provide credentials.');
+        console.log('[Rondevu] Constructor called:', {
+            username: this.username,
+            hasKeypair: !!this.keypair,
+            publicKey: this.keypair?.publicKey
+        })
     }
 
-    return new RondevuPeer(
-      this._offers,
-      rtcConfig,
-      undefined, // No existing peer connection
-      this.rtcPeerConnection,
-      this.rtcSessionDescription,
-      this.rtcIceCandidate
-    );
-  }
+    // ============================================
+    // Initialization
+    // ============================================
 
-  /**
-   * Expose a durable service with automatic reconnection and TTL refresh
-   *
-   * Creates a service that handles incoming connections with automatic
-   * reconnection and message queuing during network interruptions.
-   *
-   * @param config Service configuration
-   * @returns DurableService instance
-   *
-   * @example
-   * ```typescript
-   * const service = await client.exposeService({
-   *   username: 'alice',
-   *   privateKey: keypair.privateKey,
-   *   serviceFqn: 'chat@1.0.0',
-   *   poolSize: 10,
-   *   handler: (channel, connectionId) => {
-   *     channel.on('message', (data) => {
-   *       console.log('Received:', data);
-   *       channel.send(`Echo: ${data}`);
-   *     });
-   *   }
-   * });
-   *
-   * await service.start();
-   * ```
-   */
-  async exposeService(
-    config: DurableServiceConfig & {
-      handler: (channel: DurableChannel, connectionId: string) => void | Promise<void>;
-    }
-  ): Promise<DurableService> {
-    if (!this._offers || !this.credentials) {
-      throw new Error('Not authenticated. Call register() first or provide credentials.');
+    /**
+     * Initialize the service - generates keypair if not provided
+     * Call this before using other methods
+     */
+    async initialize(): Promise<void> {
+        console.log('[Rondevu] Initialize called, hasKeypair:', !!this.keypair)
+
+        if (!this.keypair) {
+            console.log('[Rondevu] Generating new keypair...')
+            this.keypair = await RondevuAPI.generateKeypair()
+            console.log('[Rondevu] Generated keypair, publicKey:', this.keypair.publicKey)
+        } else {
+            console.log('[Rondevu] Using existing keypair, publicKey:', this.keypair.publicKey)
+        }
+
+        // Register with API if no credentials provided
+        if (!this.api['credentials']) {
+            const credentials = await this.api.register()
+            this.api.setCredentials(credentials)
+        }
     }
 
-    const service = new DurableService(
-      this._offers,
-      this.baseUrl,
-      this.credentials,
-      config.handler,
-      config
-    );
+    // ============================================
+    // Username Management
+    // ============================================
 
-    return service;
-  }
+    /**
+     * Claim the username with Ed25519 signature
+     * Should be called once before publishing services
+     */
+    async claimUsername(): Promise<void> {
+        if (!this.keypair) {
+            throw new Error('Not initialized. Call initialize() first.')
+        }
 
-  /**
-   * Create a durable connection to a service by username and service FQN
-   *
-   * Establishes a WebRTC connection with automatic reconnection and
-   * message queuing during network interruptions.
-   *
-   * @param username Username of the service provider
-   * @param serviceFqn Fully qualified service name
-   * @param config Optional connection configuration
-   * @returns DurableConnection instance
-   *
-   * @example
-   * ```typescript
-   * const connection = await client.connect('alice', 'chat@1.0.0', {
-   *   maxReconnectAttempts: 5
-   * });
-   *
-   * const channel = connection.createChannel('main');
-   * channel.on('message', (data) => {
-   *   console.log('Received:', data);
-   * });
-   *
-   * await connection.connect();
-   * channel.send('Hello!');
-   * ```
-   */
-  async connect(
-    username: string,
-    serviceFqn: string,
-    config?: DurableConnectionConfig
-  ): Promise<DurableConnection> {
-    if (!this._offers) {
-      throw new Error('Not authenticated. Call register() first or provide credentials.');
+        // Check if username is already claimed
+        const check = await this.api.checkUsername(this.username)
+        if (!check.available) {
+            // Verify it's claimed by us
+            if (check.publicKey === this.keypair.publicKey) {
+                this.usernameClaimed = true
+                return
+            }
+            throw new Error(`Username "${this.username}" is already claimed by another user`)
+        }
+
+        // Generate signature for username claim
+        const message = `claim:${this.username}:${Date.now()}`
+        const signature = await RondevuAPI.signMessage(message, this.keypair.privateKey)
+
+        // Claim the username
+        await this.api.claimUsername(this.username, this.keypair.publicKey, signature, message)
+        this.usernameClaimed = true
     }
 
-    const connectionInfo: ConnectionInfo = {
-      username,
-      serviceFqn
-    };
+    /**
+     * Check if username has been claimed (checks with server)
+     */
+    async isUsernameClaimed(): Promise<boolean> {
+        if (!this.keypair) {
+            return false
+        }
 
-    return new DurableConnection(this._offers, connectionInfo, config);
-  }
+        try {
+            const check = await this.api.checkUsername(this.username)
 
-  /**
-   * Create a durable connection to a service by UUID
-   *
-   * Establishes a WebRTC connection with automatic reconnection and
-   * message queuing during network interruptions.
-   *
-   * @param uuid Service UUID
-   * @param config Optional connection configuration
-   * @returns DurableConnection instance
-   *
-   * @example
-   * ```typescript
-   * const connection = await client.connectByUuid('service-uuid-here', {
-   *   maxReconnectAttempts: 5
-   * });
-   *
-   * const channel = connection.createChannel('main');
-   * channel.on('message', (data) => {
-   *   console.log('Received:', data);
-   * });
-   *
-   * await connection.connect();
-   * channel.send('Hello!');
-   * ```
-   */
-  async connectByUuid(
-    uuid: string,
-    config?: DurableConnectionConfig
-  ): Promise<DurableConnection> {
-    if (!this._offers) {
-      throw new Error('Not authenticated. Call register() first or provide credentials.');
+            // Debug logging
+            console.log('[Rondevu] Username check:', {
+                username: this.username,
+                available: check.available,
+                serverPublicKey: check.publicKey,
+                localPublicKey: this.keypair.publicKey,
+                match: check.publicKey === this.keypair.publicKey
+            })
+
+            // Username is claimed if it's not available and owned by our public key
+            const claimed = !check.available && check.publicKey === this.keypair.publicKey
+
+            // Update internal flag to match server state
+            this.usernameClaimed = claimed
+
+            return claimed
+        } catch (err) {
+            console.error('Failed to check username claim status:', err)
+            return false
+        }
     }
 
-    const connectionInfo: ConnectionInfo = {
-      uuid
-    };
+    // ============================================
+    // Service Publishing
+    // ============================================
 
-    return new DurableConnection(this._offers, connectionInfo, config);
-  }
+    /**
+     * Publish a service with automatic signature generation
+     */
+    async publishService(options: PublishServiceOptions): Promise<Service> {
+        if (!this.keypair) {
+            throw new Error('Not initialized. Call initialize() first.')
+        }
+
+        if (!this.usernameClaimed) {
+            throw new Error(
+                'Username not claimed. Call claimUsername() first or the server will reject the service.'
+            )
+        }
+
+        const { serviceFqn, offers, ttl } = options
+
+        // Generate signature for service publication
+        const message = `publish:${this.username}:${serviceFqn}:${Date.now()}`
+        const signature = await RondevuAPI.signMessage(message, this.keypair.privateKey)
+
+        // Create service request
+        const serviceRequest: ServiceRequest = {
+            serviceFqn, // Must include @username
+            offers,
+            signature,
+            message,
+            ttl,
+        }
+
+        // Publish to server
+        return await this.api.publishService(serviceRequest)
+    }
+
+    // ============================================
+    // Service Discovery
+    // ============================================
+
+    /**
+     * Get service by FQN (with username) - Direct lookup
+     * Example: chat:1.0.0@alice
+     */
+    async getService(serviceFqn: string): Promise<{
+        serviceId: string
+        username: string
+        serviceFqn: string
+        offerId: string
+        sdp: string
+        createdAt: number
+        expiresAt: number
+    }> {
+        return await this.api.getService(serviceFqn)
+    }
+
+    /**
+     * Discover a random available service without knowing the username
+     * Example: chat:1.0.0 (without @username)
+     */
+    async discoverService(serviceVersion: string): Promise<{
+        serviceId: string
+        username: string
+        serviceFqn: string
+        offerId: string
+        sdp: string
+        createdAt: number
+        expiresAt: number
+    }> {
+        return await this.api.discoverService(serviceVersion)
+    }
+
+    /**
+     * Discover multiple available services with pagination
+     * Example: chat:1.0.0 (without @username)
+     */
+    async discoverServices(serviceVersion: string, limit: number = 10, offset: number = 0): Promise<{
+        services: Array<{
+            serviceId: string
+            username: string
+            serviceFqn: string
+            offerId: string
+            sdp: string
+            createdAt: number
+            expiresAt: number
+        }>
+        count: number
+        limit: number
+        offset: number
+    }> {
+        return await this.api.discoverServices(serviceVersion, limit, offset)
+    }
+
+    // ============================================
+    // WebRTC Signaling
+    // ============================================
+
+    /**
+     * Post answer SDP to specific offer
+     */
+    async postOfferAnswer(serviceFqn: string, offerId: string, sdp: string): Promise<{
+        success: boolean
+        offerId: string
+    }> {
+        return await this.api.postOfferAnswer(serviceFqn, offerId, sdp)
+    }
+
+    /**
+     * Get answer SDP (offerer polls this)
+     */
+    async getOfferAnswer(serviceFqn: string, offerId: string): Promise<{
+        sdp: string
+        offerId: string
+        answererId: string
+        answeredAt: number
+    } | null> {
+        return await this.api.getOfferAnswer(serviceFqn, offerId)
+    }
+
+    /**
+     * Add ICE candidates to specific offer
+     */
+    async addOfferIceCandidates(serviceFqn: string, offerId: string, candidates: RTCIceCandidateInit[]): Promise<{
+        count: number
+        offerId: string
+    }> {
+        return await this.api.addOfferIceCandidates(serviceFqn, offerId, candidates)
+    }
+
+    /**
+     * Get ICE candidates for specific offer (with polling support)
+     */
+    async getOfferIceCandidates(serviceFqn: string, offerId: string, since: number = 0): Promise<{
+        candidates: IceCandidate[]
+        offerId: string
+    }> {
+        return await this.api.getOfferIceCandidates(serviceFqn, offerId, since)
+    }
+
+    // ============================================
+    // Utility Methods
+    // ============================================
+
+    /**
+     * Get the current keypair (for backup/storage)
+     */
+    getKeypair(): Keypair | null {
+        return this.keypair
+    }
+
+    /**
+     * Get the username
+     */
+    getUsername(): string {
+        return this.username
+    }
+
+    /**
+     * Get the public key
+     */
+    getPublicKey(): string | null {
+        return this.keypair?.publicKey || null
+    }
+
+    /**
+     * Access to underlying API for advanced operations
+     * @deprecated Use direct methods on Rondevu instance instead
+     */
+    getAPI(): RondevuAPI {
+        return this.api
+    }
 }

src/service-pool.ts

@@ -1,590 +0,0 @@
-import { RondevuOffers, Offer } from './offers.js';
-import { RondevuUsername } from './usernames.js';
-import RondevuPeer from './peer/index.js';
-import { OfferPool, AnsweredOffer } from './offer-pool.js';
-
-/**
- * Connection information for tracking active connections
- */
-interface ConnectionInfo {
-  peer: RondevuPeer;
-  channel: RTCDataChannel;
-  connectedAt: number;
-  offerId: string;
-}
-
-/**
- * Status information about the pool
- */
-export interface PoolStatus {
-  /** Number of active offers in the pool */
-  activeOffers: number;
-
-  /** Number of currently connected peers */
-  activeConnections: number;
-
-  /** Total number of connections handled since start */
-  totalConnectionsHandled: number;
-
-  /** Number of failed offer creation attempts */
-  failedOfferCreations: number;
-}
-
-/**
- * Configuration options for a pooled service
- */
-export interface ServicePoolOptions {
-  /** Username that owns the service */
-  username: string;
-
-  /** Private key for signing service operations */
-  privateKey: string;
-
-  /** Fully qualified service name (e.g., com.example.chat@1.0.0) */
-  serviceFqn: string;
-
-  /** WebRTC configuration */
-  rtcConfig?: RTCConfiguration;
-
-  /** Whether the service is publicly discoverable */
-  isPublic?: boolean;
-
-  /** Optional metadata for the service */
-  metadata?: Record<string, any>;
-
-  /** Time-to-live for offers in milliseconds */
-  ttl?: number;
-
-  /** Handler invoked for each new connection */
-  handler: (channel: RTCDataChannel, peer: RondevuPeer, connectionId: string) => void;
-
-  /** Number of simultaneous open offers to maintain (default: 1) */
-  poolSize?: number;
-
-  /** Polling interval in milliseconds (default: 2000ms) */
-  pollingInterval?: number;
-
-  /** Callback for pool status updates */
-  onPoolStatus?: (status: PoolStatus) => void;
-
-  /** Error handler for pool operations */
-  onError?: (error: Error, context: string) => void;
-}
-
-/**
- * Service handle with pool-specific methods
- */
-export interface PooledServiceHandle {
-  /** Service ID */
-  serviceId: string;
-
-  /** Service UUID */
-  uuid: string;
-
-  /** Offer ID */
-  offerId: string;
-
-  /** Unpublish the service */
-  unpublish: () => Promise<void>;
-
-  /** Get current pool status */
-  getStatus: () => PoolStatus;
-
-  /** Manually add offers to the pool */
-  addOffers: (count: number) => Promise<void>;
-}
-
-/**
- * Manages a pooled service with multiple concurrent connections
- *
- * ServicePool coordinates offer creation, answer polling, and connection
- * management for services that need to handle multiple simultaneous connections.
- */
-export class ServicePool {
-  private offerPool?: OfferPool;
-  private connections: Map<string, ConnectionInfo> = new Map();
-  private peerConnections: Map<string, RTCPeerConnection> = new Map();
-  private status: PoolStatus = {
-    activeOffers: 0,
-    activeConnections: 0,
-    totalConnectionsHandled: 0,
-    failedOfferCreations: 0
-  };
-  private serviceId?: string;
-  private uuid?: string;
-  private offersApi: RondevuOffers;
-  private usernameApi: RondevuUsername;
-
-  constructor(
-    private baseUrl: string,
-    private credentials: { peerId: string; secret: string },
-    private options: ServicePoolOptions
-  ) {
-    this.offersApi = new RondevuOffers(baseUrl, credentials);
-    this.usernameApi = new RondevuUsername(baseUrl);
-  }
-
-  /**
-   * Start the pooled service
-   */
-  async start(): Promise<PooledServiceHandle> {
-    const poolSize = this.options.poolSize || 1;
-
-    // 1. Create initial service (publishes first offer)
-    const service = await this.publishInitialService();
-    this.serviceId = service.serviceId;
-    this.uuid = service.uuid;
-
-    // 2. Create additional offers for pool (poolSize - 1)
-    const additionalOffers: Offer[] = [];
-    const additionalPeerConnections: RTCPeerConnection[] = [];
-    const additionalDataChannels: RTCDataChannel[] = [];
-    if (poolSize > 1) {
-      try {
-        const result = await this.createOffers(poolSize - 1);
-        additionalOffers.push(...result.offers);
-        additionalPeerConnections.push(...result.peerConnections);
-        additionalDataChannels.push(...result.dataChannels);
-      } catch (error) {
-        this.handleError(error as Error, 'initial-offer-creation');
-      }
-    }
-
-    // 3. Initialize OfferPool with all offers
-    this.offerPool = new OfferPool(this.offersApi, {
-      poolSize,
-      pollingInterval: this.options.pollingInterval || 2000,
-      onAnswered: (answer) => this.handleConnection(answer),
-      onRefill: (count) => this.createOffers(count),
-      onError: (err, ctx) => this.handleError(err, ctx)
-    });
-
-    // Add all offers to pool with their peer connections and data channels
-    const allOffers = [
-      { id: service.offerId, peerId: this.credentials.peerId, sdp: service.offerSdp, topics: [], expiresAt: service.expiresAt, lastSeen: Date.now() },
-      ...additionalOffers
-    ];
-    const allPeerConnections = [
-      service.peerConnection,
-      ...additionalPeerConnections
-    ];
-    const allDataChannels = [
-      service.dataChannel,
-      ...additionalDataChannels
-    ];
-    await this.offerPool.addOffers(allOffers, allPeerConnections, allDataChannels);
-
-    // 4. Start polling
-    await this.offerPool.start();
-
-    // Update status
-    this.updateStatus();
-
-    // 5. Return handle
-    return {
-      serviceId: this.serviceId,
-      uuid: this.uuid,
-      offerId: service.offerId,
-      unpublish: () => this.stop(),
-      getStatus: () => this.getStatus(),
-      addOffers: (count) => this.manualRefill(count)
-    };
-  }
-
-  /**
-   * Stop the pooled service and clean up
-   */
-  async stop(): Promise<void> {
-    // 1. Stop accepting new connections
-    if (this.offerPool) {
-      await this.offerPool.stop();
-    }
-
-    // 2. Close peer connections from the pool
-    if (this.offerPool) {
-      const poolPeerConnections = this.offerPool.getActivePeerConnections();
-      poolPeerConnections.forEach(pc => {
-        try {
-          pc.close();
-        } catch {
-          // Ignore errors during cleanup
-        }
-      });
-    }
-
-    // 3. Delete remaining offers
-    if (this.offerPool) {
-      const offerIds = this.offerPool.getActiveOfferIds();
-      await Promise.allSettled(
-        offerIds.map(id => this.offersApi.delete(id).catch(() => {}))
-      );
-    }
-
-    // 4. Close active connections
-    const closePromises = Array.from(this.connections.values()).map(
-      async (conn) => {
-        try {
-          // Give a brief moment for graceful closure
-          await new Promise(resolve => setTimeout(resolve, 100));
-          conn.peer.pc.close();
-        } catch {
-          // Ignore errors during cleanup
-        }
-      }
-    );
-    await Promise.allSettled(closePromises);
-
-    // 5. Delete service if we have a serviceId
-    if (this.serviceId) {
-      try {
-        const response = await fetch(`${this.baseUrl}/services/${this.serviceId}`, {
-          method: 'DELETE',
-          headers: {
-            'Content-Type': 'application/json',
-            'Authorization': `Bearer ${this.credentials.peerId}:${this.credentials.secret}`
-          },
-          body: JSON.stringify({ username: this.options.username })
-        });
-
-        if (!response.ok) {
-          console.error('Failed to delete service:', await response.text());
-        }
-      } catch (error) {
-        console.error('Error deleting service:', error);
-      }
-    }
-
-    // Clear all state
-    this.connections.clear();
-    this.offerPool = undefined;
-  }
-
-  /**
-   * Handle an answered offer by setting up the connection
-   */
-  private async handleConnection(answer: AnsweredOffer): Promise<void> {
-    const connectionId = this.generateConnectionId();
-
-    try {
-      // Use the existing peer connection from the pool
-      const peer = new RondevuPeer(
-        this.offersApi,
-        this.options.rtcConfig || {
-          iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
-        },
-        answer.peerConnection // Use the existing peer connection
-      );
-
-      peer.role = 'offerer';
-      peer.offerId = answer.offerId;
-
-      // Verify peer connection is in correct state
-      if (peer.pc.signalingState !== 'have-local-offer') {
-        console.error('Peer connection state info:', {
-          signalingState: peer.pc.signalingState,
-          connectionState: peer.pc.connectionState,
-          iceConnectionState: peer.pc.iceConnectionState,
-          iceGatheringState: peer.pc.iceGatheringState,
-          hasLocalDescription: !!peer.pc.localDescription,
-          hasRemoteDescription: !!peer.pc.remoteDescription,
-          localDescriptionType: peer.pc.localDescription?.type,
-          remoteDescriptionType: peer.pc.remoteDescription?.type,
-          offerId: answer.offerId
-        });
-        throw new Error(
-          `Invalid signaling state: ${peer.pc.signalingState}. Expected 'have-local-offer' to set remote answer.`
-        );
-      }
-
-      // Set remote description (the answer)
-      await peer.pc.setRemoteDescription({
-        type: 'answer',
-        sdp: answer.sdp
-      });
-
-      // Use the data channel we created when making the offer
-      if (!answer.dataChannel) {
-        throw new Error('No data channel found for answered offer');
-      }
-
-      const channel = answer.dataChannel;
-
-      // Wait for the channel to open (it was created when we made the offer)
-      if (channel.readyState !== 'open') {
-        await new Promise<void>((resolve, reject) => {
-          const timeout = setTimeout(
-            () => reject(new Error('Timeout waiting for data channel to open')),
-            30000
-          );
-
-          channel.onopen = () => {
-            clearTimeout(timeout);
-            resolve();
-          };
-
-          channel.onerror = (error) => {
-            clearTimeout(timeout);
-            reject(new Error('Data channel error'));
-          };
-        });
-      }
-
-      // Register connection
-      this.connections.set(connectionId, {
-        peer,
-        channel,
-        connectedAt: Date.now(),
-        offerId: answer.offerId
-      });
-
-      this.status.activeConnections++;
-      this.status.totalConnectionsHandled++;
-
-      // Setup cleanup on disconnect
-      peer.on('disconnected', () => {
-        this.connections.delete(connectionId);
-        this.status.activeConnections--;
-        this.updateStatus();
-      });
-
-      peer.on('failed', () => {
-        this.connections.delete(connectionId);
-        this.status.activeConnections--;
-        this.updateStatus();
-      });
-
-      // Update status
-      this.updateStatus();
-
-      // Invoke user handler (wrapped in try-catch)
-      try {
-        this.options.handler(channel, peer, connectionId);
-      } catch (handlerError) {
-        this.handleError(handlerError as Error, 'handler');
-      }
-
-    } catch (error) {
-      this.handleError(error as Error, 'connection-setup');
-    }
-  }
-
-  /**
-   * Create multiple offers
-   */
-  private async createOffers(count: number): Promise<{ offers: Offer[], peerConnections: RTCPeerConnection[], dataChannels: RTCDataChannel[] }> {
-    if (count <= 0) {
-      return { offers: [], peerConnections: [], dataChannels: [] };
-    }
-
-    // Server supports max 10 offers per request
-    const batchSize = Math.min(count, 10);
-    const offers: Offer[] = [];
-    const peerConnections: RTCPeerConnection[] = [];
-    const dataChannels: RTCDataChannel[] = [];
-
-    try {
-      // Create peer connections and generate offers
-      const offerRequests = [];
-      for (let i = 0; i < batchSize; i++) {
-        const pc = new RTCPeerConnection(this.options.rtcConfig || {
-          iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
-        });
-
-        // Create data channel (required for offers) and save reference
-        const channel = pc.createDataChannel('rondevu-service');
-        dataChannels.push(channel);
-
-        // Create offer
-        const offer = await pc.createOffer();
-        await pc.setLocalDescription(offer);
-
-        if (!offer.sdp) {
-          pc.close();
-          throw new Error('Failed to generate SDP');
-        }
-
-        offerRequests.push({
-          sdp: offer.sdp,
-          topics: [], // V2 doesn't use topics
-          ttl: this.options.ttl
-        });
-
-        // Keep peer connection alive - DO NOT CLOSE
-        peerConnections.push(pc);
-      }
-
-      // Batch create offers
-      const createdOffers = await this.offersApi.create(offerRequests);
-      offers.push(...createdOffers);
-
-      // Set up ICE candidate handlers AFTER we have offer IDs
-      for (let i = 0; i < peerConnections.length; i++) {
-        const pc = peerConnections[i];
-        const offerId = createdOffers[i].id;
-
-        pc.onicecandidate = async (event) => {
-          if (event.candidate) {
-            const candidateData = event.candidate.toJSON();
-            if (candidateData.candidate && candidateData.candidate !== '') {
-              try {
-                await this.offersApi.addIceCandidates(offerId, [candidateData]);
-              } catch (err) {
-                console.error('Error sending ICE candidate:', err);
-              }
-            }
-          }
-        };
-      }
-
-    } catch (error) {
-      // Close any created peer connections on error
-      peerConnections.forEach(pc => pc.close());
-      this.status.failedOfferCreations++;
-      this.handleError(error as Error, 'offer-creation');
-      throw error;
-    }
-
-    return { offers, peerConnections, dataChannels };
-  }
-
-  /**
-   * Publish the initial service (creates first offer)
-   */
-  private async publishInitialService(): Promise<{
-    serviceId: string;
-    uuid: string;
-    offerId: string;
-    offerSdp: string;
-    expiresAt: number;
-    peerConnection: RTCPeerConnection;
-    dataChannel: RTCDataChannel;
-  }> {
-    const { username, privateKey, serviceFqn, rtcConfig, isPublic, metadata, ttl } = this.options;
-
-    // Create peer connection for initial offer
-    const pc = new RTCPeerConnection(rtcConfig || {
-      iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
-    });
-
-    const dataChannel = pc.createDataChannel('rondevu-service');
-
-    // Create offer
-    const offer = await pc.createOffer();
-    await pc.setLocalDescription(offer);
-
-    if (!offer.sdp) {
-      pc.close();
-      throw new Error('Failed to generate SDP');
-    }
-
-    // Store the SDP
-    const offerSdp = offer.sdp;
-
-    // Create signature
-    const timestamp = Date.now();
-    const message = `publish:${username}:${serviceFqn}:${timestamp}`;
-    const signature = await this.usernameApi.signMessage(message, privateKey);
-
-    // Publish service
-    const response = await fetch(`${this.baseUrl}/services`, {
-      method: 'POST',
-      headers: {
-        'Content-Type': 'application/json',
-        'Authorization': `Bearer ${this.credentials.peerId}:${this.credentials.secret}`
-      },
-      body: JSON.stringify({
-        username,
-        serviceFqn,
-        sdp: offerSdp,
-        ttl,
-        isPublic,
-        metadata,
-        signature,
-        message
-      })
-    });
-
-    if (!response.ok) {
-      pc.close();
-      const error = await response.json();
-      throw new Error(error.error || 'Failed to publish service');
-    }
-
-    const data = await response.json();
-
-    // Set up ICE candidate handler now that we have the offer ID
-    pc.onicecandidate = async (event) => {
-      if (event.candidate) {
-        const candidateData = event.candidate.toJSON();
-        if (candidateData.candidate && candidateData.candidate !== '') {
-          try {
-            await this.offersApi.addIceCandidates(data.offerId, [candidateData]);
-          } catch (err) {
-            console.error('Error sending ICE candidate:', err);
-          }
-        }
-      }
-    };
-
-    return {
-      serviceId: data.serviceId,
-      uuid: data.uuid,
-      offerId: data.offerId,
-      offerSdp,
-      expiresAt: data.expiresAt,
-      peerConnection: pc, // Keep peer connection alive
-      dataChannel // Keep data channel alive
-    };
-  }
-
-  /**
-   * Manually add offers to the pool
-   */
-  private async manualRefill(count: number): Promise<void> {
-    if (!this.offerPool) {
-      throw new Error('Pool not started');
-    }
-
-    const result = await this.createOffers(count);
-    await this.offerPool.addOffers(result.offers, result.peerConnections, result.dataChannels);
-    this.updateStatus();
-  }
-
-  /**
-   * Get current pool status
-   */
-  private getStatus(): PoolStatus {
-    return { ...this.status };
-  }
-
-  /**
-   * Update status and notify listeners
-   */
-  private updateStatus(): void {
-    if (this.offerPool) {
-      this.status.activeOffers = this.offerPool.getActiveOfferCount();
-    }
-
-    if (this.options.onPoolStatus) {
-      this.options.onPoolStatus(this.getStatus());
-    }
-  }
-
-  /**
-   * Handle errors
-   */
-  private handleError(error: Error, context: string): void {
-    if (this.options.onError) {
-      this.options.onError(error, context);
-    } else {
-      console.error(`ServicePool error (${context}):`, error);
-    }
-  }
-
-  /**
-   * Generate a unique connection ID
-   */
-  private generateConnectionId(): string {
-    return `conn-${Date.now()}-${Math.random().toString(36).substr(2, 9)}`;
-  }
-}

src/types.ts

@@ -0,0 +1,20 @@
+/**
+ * Core signaling types
+ */
+
+/**
+ * Cleanup function returned by listener methods
+ */
+export type Binnable = () => void
+
+/**
+ * Signaler interface for WebRTC offer/answer/ICE exchange
+ */
+export interface Signaler {
+    addIceCandidate(candidate: RTCIceCandidate): Promise<void>
+    addListener(callback: (candidate: RTCIceCandidate) => void): Binnable
+    addOfferListener(callback: (offer: RTCSessionDescriptionInit) => void): Binnable
+    addAnswerListener(callback: (answer: RTCSessionDescriptionInit) => void): Binnable
+    setOffer(offer: RTCSessionDescriptionInit): Promise<void>
+    setAnswer(answer: RTCSessionDescriptionInit): Promise<void>
+}

src/usernames.ts

@@ -1,200 +0,0 @@
-import * as ed25519 from '@noble/ed25519';
-
-// Set SHA-512 hash function for ed25519 (required in @noble/ed25519 v3+)
-// Uses built-in WebCrypto API which only provides async digest
-// We use the async ed25519 functions (signAsync, verifyAsync, getPublicKeyAsync)
-ed25519.hashes.sha512Async = async (message: Uint8Array) => {
-  return new Uint8Array(await crypto.subtle.digest('SHA-512', message as BufferSource));
-};
-
-/**
- * Username claim result
- */
-export interface UsernameClaimResult {
-  username: string;
-  publicKey: string;
-  privateKey: string;
-  claimedAt: number;
-  expiresAt: number;
-}
-
-/**
- * Username availability check result
- */
-export interface UsernameCheckResult {
-  username: string;
-  available: boolean;
-  claimedAt?: number;
-  expiresAt?: number;
-  publicKey?: string;
-}
-
-/**
- * Convert Uint8Array to base64 string
- */
-function bytesToBase64(bytes: Uint8Array): string {
-  const binString = Array.from(bytes, (byte) =>
-    String.fromCodePoint(byte)
-  ).join('');
-  return btoa(binString);
-}
-
-/**
- * Convert base64 string to Uint8Array
- */
-function base64ToBytes(base64: string): Uint8Array {
-  const binString = atob(base64);
-  return Uint8Array.from(binString, (char) => char.codePointAt(0)!);
-}
-
-/**
- * Rondevu Username API
- * Handles username claiming with Ed25519 cryptographic proof
- */
-export class RondevuUsername {
-  constructor(private baseUrl: string) {}
-
-  /**
-   * Generates an Ed25519 keypair for username claiming
-   */
-  async generateKeypair(): Promise<{ publicKey: string; privateKey: string }> {
-    const privateKey = ed25519.utils.randomSecretKey();
-    const publicKey = await ed25519.getPublicKeyAsync(privateKey);
-
-    return {
-      publicKey: bytesToBase64(publicKey),
-      privateKey: bytesToBase64(privateKey)
-    };
-  }
-
-  /**
-   * Signs a message with an Ed25519 private key
-   */
-  async signMessage(message: string, privateKeyBase64: string): Promise<string> {
-    const privateKey = base64ToBytes(privateKeyBase64);
-    const encoder = new TextEncoder();
-    const messageBytes = encoder.encode(message);
-
-    const signature = await ed25519.signAsync(messageBytes, privateKey);
-    return bytesToBase64(signature);
-  }
-
-  /**
-   * Claims a username
-   * Generates a new keypair if one is not provided
-   */
-  async claimUsername(
-    username: string,
-    existingKeypair?: { publicKey: string; privateKey: string }
-  ): Promise<UsernameClaimResult> {
-    // Generate or use existing keypair
-    const keypair = existingKeypair || await this.generateKeypair();
-
-    // Create signed message
-    const timestamp = Date.now();
-    const message = `claim:${username}:${timestamp}`;
-    const signature = await this.signMessage(message, keypair.privateKey);
-
-    // Send claim request
-    const response = await fetch(`${this.baseUrl}/usernames/claim`, {
-      method: 'POST',
-      headers: { 'Content-Type': 'application/json' },
-      body: JSON.stringify({
-        username,
-        publicKey: keypair.publicKey,
-        signature,
-        message
-      })
-    });
-
-    if (!response.ok) {
-      const error = await response.json();
-      throw new Error(error.error || 'Failed to claim username');
-    }
-
-    const data = await response.json();
-
-    return {
-      username: data.username,
-      publicKey: keypair.publicKey,
-      privateKey: keypair.privateKey,
-      claimedAt: data.claimedAt,
-      expiresAt: data.expiresAt
-    };
-  }
-
-  /**
-   * Checks if a username is available
-   */
-  async checkUsername(username: string): Promise<UsernameCheckResult> {
-    const response = await fetch(`${this.baseUrl}/usernames/${username}`);
-
-    if (!response.ok) {
-      throw new Error('Failed to check username');
-    }
-
-    const data = await response.json();
-
-    return {
-      username: data.username,
-      available: data.available,
-      claimedAt: data.claimedAt,
-      expiresAt: data.expiresAt,
-      publicKey: data.publicKey
-    };
-  }
-
-  /**
-   * Helper: Save keypair to localStorage
-   * WARNING: This stores the private key in localStorage which is not the most secure
-   * For production use, consider using IndexedDB with encryption or hardware security modules
-   */
-  saveKeypairToStorage(username: string, publicKey: string, privateKey: string): void {
-    const data = { username, publicKey, privateKey, savedAt: Date.now() };
-    localStorage.setItem(`rondevu:keypair:${username}`, JSON.stringify(data));
-  }
-
-  /**
-   * Helper: Load keypair from localStorage
-   */
-  loadKeypairFromStorage(username: string): { publicKey: string; privateKey: string } | null {
-    const stored = localStorage.getItem(`rondevu:keypair:${username}`);
-    if (!stored) return null;
-
-    try {
-      const data = JSON.parse(stored);
-      return { publicKey: data.publicKey, privateKey: data.privateKey };
-    } catch {
-      return null;
-    }
-  }
-
-  /**
-   * Helper: Delete keypair from localStorage
-   */
-  deleteKeypairFromStorage(username: string): void {
-    localStorage.removeItem(`rondevu:keypair:${username}`);
-  }
-
-  /**
-   * Export keypair as JSON string (for backup)
-   */
-  exportKeypair(publicKey: string, privateKey: string): string {
-    return JSON.stringify({
-      publicKey,
-      privateKey,
-      exportedAt: Date.now()
-    });
-  }
-
-  /**
-   * Import keypair from JSON string
-   */
-  importKeypair(json: string): { publicKey: string; privateKey: string } {
-    const data = JSON.parse(json);
-    if (!data.publicKey || !data.privateKey) {
-      throw new Error('Invalid keypair format');
-    }
-    return { publicKey: data.publicKey, privateKey: data.privateKey };
-  }
-}