@telnyx/react-native-voice-sdk

A comprehensive React Native SDK for Telnyx WebRTC voice calling.

Features

• 🎯 WebRTC Voice Calls: High-quality voice calls using Telnyx infrastructure
• 📞 Call Management: Full call lifecycle management (incoming, outgoing, hold, transfer)
• 🔐 Secure Authentication: JWT-based authentication with SIP credentials support
• 🌐 Network Resilience: Automatic network change detection and reconnection
• 📊 Event-Driven: Comprehensive event system for real-time call state updates
• 📱 Push Notification Ready: Built-in support for VoIP push notifications
• 🤖 Auto-Answer Support: Built-in auto-answer functionality for automated workflows

Installation

npm install @telnyx/react-native-voice-sdk

Quick Start

import { TelnyxRTC, ClientOptions } from '@telnyx/react-native-voice-sdk';

// Initialize the client
const clientOptions: ClientOptions = {
  login_token: 'your-jwt-token', // Recommended
  // OR use login/password
  // login: 'your-sip-username',
  // password: 'your-sip-password',
};

const client = new TelnyxRTC(clientOptions);

// Connect to Telnyx
await client.connect();

// Make a call
const call = await client.newCall({
  destinationNumber: '+1234567890',
  callerIdName: 'John Doe'
});

// Listen for call events
call.on('telnyx.call.state', (call, state) => {
  console.log(\`Call state: \${state}\`);
});

// Listen for client events
client.on('telnyx.client.ready', () => console.log('Ready!'));
client.on('telnyx.call.incoming', (call) => {
  call.answer(); // or call.hangup()
});

API Reference

TelnyxRTC

The main client class for managing WebRTC connections and calls.

Constructor

new TelnyxRTC(options: ClientOptions)

Methods

• connect(): Connect to Telnyx infrastructure
• disconnect(): Disconnect and cleanup
• newCall(options: CallOptions): Create a new outgoing call
• processVoIPNotification(payload): Process VoIP push notification
• queueAnswerFromCallKit(): Queue answer action for push calls
• queueEndFromCallKit(): Queue end action for push calls

Events

• telnyx.client.ready: Client is connected and ready
• telnyx.client.error: Connection or authentication error
• telnyx.call.incoming: Incoming call received

Call

Represents an individual voice call.

Methods

• answer(): Answer an incoming call
• hangup(): End the call
• hold(): Put call on hold
• unhold(): Resume call from hold
• dtmf(digits): Send DTMF tones

Events

• telnyx.call.state: Call state changed ('new', 'ringing', 'active', 'ended', 'held')

Advanced Features

Push Notifications & Auto-Answer

// Process push notification
client.processVoIPNotification(pushPayload);

// Enable auto-answer for next call (Android example)
import AsyncStorage from '@react-native-async-storage/async-storage';
await AsyncStorage.setItem('@auto_answer_next_call', 'true');

// Queue CallKit actions (iOS)
client.queueAnswerFromCallKit();

Network Resilience

The SDK automatically handles network changes and reconnections.

// The client will automatically reconnect on network changes
client.on('telnyx.client.ready', () => {
  console.log('Connected/Reconnected to Telnyx');
});

TypeScript Support

The SDK is written in TypeScript and includes full type definitions.

import {
  TelnyxRTC,
  ClientOptions,
  CallOptions,
  CallState,
  Call,
} from '@telnyx/react-native-voice-sdk';

Example Usage

import React, { useEffect, useState } from 'react';
import { TelnyxRTC, Call } from '@telnyx/react-native-voice-sdk';

export const VoiceApp = () => {
  const [client, setClient] = useState<TelnyxRTC | null>(null);
  const [call, setCall] = useState<Call | null>(null);

  useEffect(() => {
    const telnyxClient = new TelnyxRTC({
      login_token: 'your-jwt-token'
    });

    telnyxClient.on('telnyx.client.ready', () => {
      console.log('Ready for calls!');
    });

    telnyxClient.on('telnyx.call.incoming', (incomingCall) => {
      setCall(incomingCall);
      // Auto-answer or show incoming call UI
      incomingCall.answer();
    });

    telnyxClient.connect();
    setClient(telnyxClient);

    return () => telnyxClient.disconnect();
  }, []);

  const makeCall = async () => {
    if (client) {
      const newCall = await client.newCall({
        destinationNumber: '+1234567890'
      });
      setCall(newCall);
    }
  };

  return (
    // Your call UI here
    <></>
  );
};

Requirements

• React Native 0.60+
• React 16.8+
• iOS 11.0+ / Android API 21+

Dependencies

This package requires:

• @react-native-community/netinfo - Network state monitoring
• react-native-webrtc - WebRTC functionality
• eventemitter3 - Event handling
• loglevel - Logging
• uuid-random - UUID generation

License

MIT License