Telnyx Webrtc Client React Native

---
name: telnyx-webrtc-client-react-native
description: >-
  Build cross-platform VoIP calling apps with React Native using Telnyx Voice SDK.
  High-level reactive API with automatic lifecycle management, CallKit/ConnectionService
  integration, and push notifications. Use for mobile VoIP apps with minimal setup.
metadata:
  author: telnyx
  product: webrtc
  language: typescript
  platform: react-native
---

# Telnyx WebRTC - React Native SDK

Build real-time voice communication into React Native apps (Android & iOS) using the `@telnyx/react-voice-commons-sdk` library.

> **Prerequisites**: Create WebRTC credentials and generate a login token using the Telnyx server-side SDK. See the `telnyx-webrtc-*` skill in your server language plugin (e.g., `telnyx-python`, `telnyx-javascript`).

## Features

- **Reactive Streams**: RxJS-based state management
- **Automatic Lifecycle**: Background/foreground handling
- **Native Call UI**: CallKit (iOS) and ConnectionService (Android)
- **Push Notifications**: FCM (Android) and APNs/PushKit (iOS)
- **TypeScript Support**: Full type definitions

## Installation

```bash
npm install @telnyx/react-voice-commons-sdk
```

---

## Basic Setup

```tsx
import { TelnyxVoiceApp, createTelnyxVoipClient } from '@telnyx/react-voice-commons-sdk';

// Create VoIP client instance
const voipClient = createTelnyxVoipClient({
  enableAppStateManagement: true,  // Auto background/foreground handling
  debug: true,                     // Enable logging
});

export default function App() {
  return (
    <TelnyxVoiceApp 
      voipClient={voipClient} 
      enableAutoReconnect={false} 
      debug={true}
    >
      <YourAppContent />
    </TelnyxVoiceApp>
  );
}
```

---

## Authentication

### Credential-Based Login

```tsx
import { createCredentialConfig } from '@telnyx/react-voice-commons-sdk';

const config = createCredentialConfig('sip_username', 'sip_password', {
  debug: true,
  pushNotificationDeviceToken: 'your_device_token',
});

await voipClient.login(config);
```

### Token-Based Login (JWT)

```tsx
import { createTokenConfig } from '@telnyx/react-voice-commons-sdk';

const config = createTokenConfig('your_jwt_token', {
  debug: true,
  pushNotificationDeviceToken: 'your_device_token',
});

await voipClient.loginWithToken(config);
```

### Auto-Reconnection

The library automatically stores credentials for seamless reconnection:

```tsx
// Automatically reconnects using stored credentials
const success = await voipClient.loginFromStoredConfig();

if (!success) {
  // No stored auth, show login UI
}
```

---

## Reactive State Management

```tsx
import { useEffect, useState } from 'react';

function CallScreen() {
  const [connectionState, setConnectionState] = useState(null);
  const [calls, setCalls] = useState([]);
  
  useEffect(() => {
    // Subscribe to connection state
    const connSub = voipClient.connectionState$.subscribe((state) => {
      setConnectionState(state);
    });
    
    // Subscribe to active calls
    const callsSub = voipClient.calls$.subscribe((activeCalls) => {
      setCalls(activeCalls);
    });
    
    return () => {
      connSub.unsubscribe();
      callsSub.unsubscribe();
    };
  }, []);
  
  return (/* UI */);
}
```

### Individual Call State

```tsx
useEffect(() => {
  if (call) {
    const sub = call.callState$.subscribe((state) => {
      console.log('Call state:', state);
    });
    return () => sub.unsubscribe();
  }
}, [call]);
```

---

## Making Calls

```tsx
const call = await voipClient.newCall('+18004377950');
```

---

## Receiving Calls

Incoming calls are handled automatically via push notifications and the `TelnyxVoiceApp` wrapper. The native call UI (CallKit/ConnectionService) is displayed automatically.

---

## Call Controls

```tsx
// Answer incoming call
await call.answer();

// Mute/Unmute
await call.mute();
await call.unmute();

// Hold/Unhold
await call.hold();
await call.unhold();

// End call
await call.hangup();

// Send DTMF
await call.dtmf('1');
```

---

## Push Notifications - Android (FCM)

### 1. Place `google-services.json` in project root

### 2. MainActivity Setup

```kotlin
// MainActivity.kt
import com.telnyx.react_voice_commons.TelnyxMainActivity

class MainActivity : TelnyxMainActivity() {
    override fun onHandleIntent(intent: Intent) {
        super.onHandleIntent(intent)
        // Additional intent processing
    }
}
```

### 3. Background Message Handler

```tsx
// index.js or App.tsx
import messaging from '@react-native-firebase/messaging';
import { TelnyxVoiceApp } from '@telnyx/react-voice-commons-sdk';

messaging().setBackgroundMessageHandler(async (remoteMessage) => {
  await TelnyxVoiceApp.handleBackgroundPush(remoteMessage.data);
});
```

---

## Push Notifications - iOS (PushKit)

### AppDelegate Setup

```swift
// AppDelegate.swift
import PushKit
import TelnyxVoiceCommons

@UIApplicationMain
public class AppDelegate: ExpoAppDelegate, PKPushRegistryDelegate {
  
  public override func application(
    _ application: UIApplication,
    didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]? = nil
  ) -> Bool {
    // Initialize VoIP push registration
    TelnyxVoipPushHandler.initializeVoipRegistration()
    return super.application(application, didFinishLaunchingWithOptions: launchOptions)
  }
  
  // VoIP Push Token Update
  public func pushRegistry(_ registry: PKPushRegistry, 
                           didUpdate pushCredentials: PKPushCredentials, 
                           for type: PKPushType) {
    TelnyxVoipPushHandler.shared.handleVoipTokenUpdate(pushCredentials, type: type)
  }
  
  // VoIP Push Received
  public func pushRegistry(_ registry: PKPushRegistry, 
                           didReceiveIncomingPushWith payload: PKPushPayload, 
                           for type: PKPushType, 
                           completion: @escaping () -> Void) {
    TelnyxVoipPushHandler.shared.handleVoipPush(payload, type: type, completion: completion)
  }
}
```

> **Note**: CallKit integration is automatically handled by the internal CallBridge component.

---

## Configuration Options

### createTelnyxVoipClient Options

| Option | Type | Default | Description |
|--------|------|---------|-------------|
| `enableAppStateManagement` | boolean | true | Auto background/foreground handling |
| `debug` | boolean | false | Enable debug logging |

### TelnyxVoiceApp Props

| Prop | Type | Description |
|------|------|-------------|
| `voipClient` | TelnyxVoipClient | The VoIP client instance |
| `enableAutoReconnect` | boolean | Auto-reconnect on disconnect |
| `debug` | boolean | Enable debug logging |

---

## Storage Keys (Managed Automatically)

The library manages these AsyncStorage keys internally:

- `@telnyx_username` - SIP username
- `@telnyx_password` - SIP password
- `@credential_token` - JWT token
- `@push_token` - Push notification token

> You don't need to manage these manually.

---

## Troubleshooting

| Issue | Solution |
|-------|----------|
| Double login | Don't call `login()` manually when using `TelnyxVoiceApp` with auto-reconnect |
| Background disconnect | Check `enableAutoReconnect` setting |
| Android push not working | Verify `google-services.json` and MainActivity extends `TelnyxMainActivity` |
| iOS push not working | Ensure AppDelegate implements `PKPushRegistryDelegate` and calls `TelnyxVoipPushHandler` |
| Memory leaks | Unsubscribe from RxJS observables in useEffect cleanup |
| Audio issues | iOS audio handled by CallBridge; Android check ConnectionService |

### Clear Stored Auth (Advanced)

```tsx
import AsyncStorage from '@react-native-async-storage/async-storage';

await AsyncStorage.multiRemove([
  '@telnyx_username',
  '@telnyx_password', 
  '@credential_token',
  '@push_token',
]);
```

---

<!-- BEGIN AUTO-GENERATED API REFERENCE -- do not edit below this line -->

**[references/webrtc-server-api.md](references/webrtc-server-api.md) has the server-side WebRTC API — credential creation, token generation, and push notification setup. You MUST read it when setting up authentication or push notifications.**

## API Reference


### TelnyxVoipClient

# Class: TelnyxVoipClient

The main public interface for the react-voice-commons module.

This class serves as the Façade for the entire module, providing a simplified
API that completely hides the underlying complexity. It is the sole entry point
for developers using the react-voice-commons package.

The TelnyxVoipClient is designed to be state-management agnostic, exposing
all observable state via RxJS streams. This allows developers to integrate it
into their chosen state management solution naturally.

### Methods

### login()

> **login**(`config`): `Promise`\<`void`\>
### Parameters
### config

[`CredentialConfig`](../interfaces/CredentialConfig.md)
### Returns

A Promise that completes when the connection attempt is initiated
### loginWithToken()

> **loginWithToken**(`config`): `Promise`\<`void`\>
### Parameters
### config

[`TokenConfig`](../interfaces/TokenConfig.md)
### Returns

A Promise that completes when the connection attempt is initiated
### logout()

> **logout**(): `Promise`\<`void`\>
### Returns
### loginFromStoredConfig()

> **loginFromStoredConfig**(): `Promise`\<`boolean`\>
### Returns
### newCall()

> **newCall**(`destination`, `callerName?`, `callerNumber?`, `customHeaders?`): `Promise`\<[`Call`](Call.md)\>
### Parameters
### destination

The destination number or SIP URI to call
### callerName?

Optional caller name to display
### callerNumber?

Optional caller ID number
### customHeaders?

Optional custom headers to include with the call
### Returns

A Promise that completes with the Call object once the invitation has been sent
### handlePushNotification()

> **handlePushNotification**(`payload`): `Promise`\<`void`\>
### Parameters
### payload

The push notification payload
### Returns
### disablePushNotifications()

> **disablePushNotifications**(): `void`
### Returns
### setCallConnecting()

> **setCallConnecting**(`callId`): `void`
### Parameters
### callId

The ID of the call to set to connecting state
### Returns
### findCallByTelnyxCall()

> **findCallByTelnyxCall**(`telnyxCall`): [`Call`](Call.md)
### Parameters
### telnyxCall

The Telnyx call object to find
### Returns

[`Call`](Call.md)
### queueAnswerFromCallKit()

> **queueAnswerFromCallKit**(`customHeaders`): `void`
### Parameters
### customHeaders

Optional custom headers to include with the answer
### Returns
### queueEndFromCallKit()

> **queueEndFromCallKit**(): `void`
### Returns
### dispose()

> **dispose**(): `void`
### Returns


### Call

# Class: Call

Represents a call with reactive state streams.

This class wraps the underlying Telnyx Call object and provides
reactive streams for all call state changes, making it easy to
integrate with any state management solution.

### Methods

### answer()

> **answer**(`customHeaders?`): `Promise`\<`void`\>
### Parameters
### customHeaders?

Optional custom headers to include with the answer
### Returns
### hangup()

> **hangup**(`customHeaders?`): `Promise`\<`void`\>
### Parameters
### customHeaders?

Optional custom headers to include with the hangup request
### Returns
### hold()

> **hold**(): `Promise`\<`void`\>
### Returns
### resume()

> **resume**(): `Promise`\<`void`\>
### Returns
### mute()

> **mute**(): `Promise`\<`void`\>
### Returns
### unmute()

> **unmute**(): `Promise`\<`void`\>
### Returns
### toggleMute()

> **toggleMute**(): `Promise`\<`void`\>
### Returns
### setConnecting()

> **setConnecting**(): `void`
### Returns
### dispose()

> **dispose**(): `void`
### Returns


### TelnyxCallState

# Enumeration: TelnyxCallState

Represents the state of a call in the Telnyx system.

This enum provides a simplified view of call states, abstracting away
the complexity of the underlying SIP call states.

### Enumeration Members

### RINGING

> **RINGING**: `"RINGING"`
### CONNECTING

> **CONNECTING**: `"CONNECTING"`
### ACTIVE

> **ACTIVE**: `"ACTIVE"`
### HELD

> **HELD**: `"HELD"`
### ENDED

> **ENDED**: `"ENDED"`
### FAILED

> **FAILED**: `"FAILED"`
### DROPPED

> **DROPPED**: `"DROPPED"`


### TelnyxConnectionState

# Enumeration: TelnyxConnectionState

Represents the connection state to the Telnyx platform.

This enum provides a simplified view of the connection status,
abstracting away the complexity of the underlying WebSocket states.

### Enumeration Members

### DISCONNECTED

> **DISCONNECTED**: `"DISCONNECTED"`
### CONNECTING

> **CONNECTING**: `"CONNECTING"`
### CONNECTED

> **CONNECTED**: `"CONNECTED"`
### RECONNECTING

> **RECONNECTING**: `"RECONNECTING"`
### ERROR

> **ERROR**: `"ERROR"`

<!-- END AUTO-GENERATED API REFERENCE -->