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Implement incoming and outgoing call notifications using the CometChat Chat SDK’s calling features. The Calls SDK handles the actual call session, while the Chat SDK manages call signaling.
Ringing functionality requires the CometChat Chat SDK (@cometchat/chat-sdk-react-native) for call signaling. The Calls SDK is used for the actual call session.

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Prerequisites

  1. CometChat Chat SDK integrated
  2. CometChat Calls SDK integrated
  3. Push notifications configured (for background calls)

​
Initiate a Call

Use the Chat SDK to initiate a call: 
import { CometChat } from '@cometchat/chat-sdk-react-native';

async function initiateCall(receiverId: string, callType: string, receiverType: string) {
  const call = new CometChat.Call(receiverId, callType, receiverType);

  try {
    const outgoingCall = await CometChat.initiateCall(call);
    console.log('Call initiated:', outgoingCall);
    return outgoingCall;
  } catch (error) {
    console.error('Error initiating call:', error);
    throw error;
  }
}

// Initiate a video call to a user
initiateCall('user_uid', CometChat.CALL_TYPE.VIDEO, CometChat.RECEIVER_TYPE.USER);

// Initiate an audio call to a group
initiateCall('group_guid', CometChat.CALL_TYPE.AUDIO, CometChat.RECEIVER_TYPE.GROUP);

​
Listen for Incoming Calls

Register a call listener to receive incoming calls: 
import { CometChat } from '@cometchat/chat-sdk-react-native';

const listenerId = 'unique_listener_id';

CometChat.addCallListener(
  listenerId,
  new CometChat.CallListener({
    onIncomingCallReceived: (call) => {
      console.log('Incoming call:', call);
      // Show incoming call UI
    },
    onOutgoingCallAccepted: (call) => {
      console.log('Call accepted:', call);
      // Start the call session
    },
    onOutgoingCallRejected: (call) => {
      console.log('Call rejected:', call);
      // Handle rejection
    },
    onIncomingCallCancelled: (call) => {
      console.log('Call cancelled:', call);
      // Dismiss incoming call UI
    },
    onCallEndedMessageReceived: (call) => {
      console.log('Call ended:', call);
      // Handle call end
    },
  })
);

// Remove listener when done
CometChat.removeCallListener(listenerId);

​
Accept a Call

Accept an incoming call: 
async function acceptCall(sessionId: string) {
  try {
    const call = await CometChat.acceptCall(sessionId);
    console.log('Call accepted:', call);
    // Start the call session with Calls SDK
    return call;
  } catch (error) {
    console.error('Error accepting call:', error);
    throw error;
  }
}

​
Reject a Call

Reject an incoming call: 
async function rejectCall(sessionId: string, status: string) {
  try {
    const call = await CometChat.rejectCall(sessionId, status);
    console.log('Call rejected:', call);
    return call;
  } catch (error) {
    console.error('Error rejecting call:', error);
    throw error;
  }
}

// Reject with status
rejectCall(sessionId, CometChat.CALL_STATUS.REJECTED);

// Mark as busy
rejectCall(sessionId, CometChat.CALL_STATUS.BUSY);

​
End a Call

End an ongoing call: 
async function endCall(sessionId: string) {
  try {
    // End the call session
    CometChatCalls.leaveSession();
    
    // Notify other participants via Chat SDK
    const call = await CometChat.endCall(sessionId);
    console.log('Call ended:', call);
    return call;
  } catch (error) {
    console.error('Error ending call:', error);
    throw error;
  }
}

​
Start Call Session After Accept

After accepting a call, start the Calls SDK session: 
import { CometChatCalls } from '@cometchat/calls-sdk-react-native';

async function startCallSession(call: any) {
  const sessionId = call.getSessionId();
  
  try {
    // Generate token for the session
    const { token } = await CometChatCalls.generateToken(sessionId);
    
    // Create call settings
    const isAudioOnly = call.getType() === CometChat.CALL_TYPE.AUDIO;
    
    const callSettings = new CometChatCalls.CallSettingsBuilder()
      .setIsAudioOnlyCall(isAudioOnly)
      .setCallEventListener(new CometChatCalls.OngoingCallListener({
        onCallEnded: () => {
          console.log('Call ended');
        },
      }))
      .build();
    
    return { token, callSettings };
  } catch (error) {
    console.error('Error starting call session:', error);
    throw error;
  }
}

​
Complete Example

import React, { useState, useEffect, useCallback } from 'react';
import { View, Text, TouchableOpacity, StyleSheet, Modal } from 'react-native';
import { CometChat } from '@cometchat/chat-sdk-react-native';
import { CometChatCalls } from '@cometchat/calls-sdk-react-native';

interface Call {
  getSessionId: () => string;
  getType: () => string;
  getSender: () => { getName: () => string };
}

function CallManager({ children }: { children: React.ReactNode }) {
  const [incomingCall, setIncomingCall] = useState<Call | null>(null);
  const [activeCall, setActiveCall] = useState<{
    token: string;
    settings: any;
  } | null>(null);

  useEffect(() => {
    const listenerId = 'call_manager_listener';

    CometChat.addCallListener(
      listenerId,
      new CometChat.CallListener({
        onIncomingCallReceived: (call: Call) => {
          setIncomingCall(call);
        },
        onOutgoingCallAccepted: async (call: Call) => {
          await startSession(call);
        },
        onOutgoingCallRejected: () => {
          setActiveCall(null);
        },
        onIncomingCallCancelled: () => {
          setIncomingCall(null);
        },
        onCallEndedMessageReceived: () => {
          setActiveCall(null);
          setIncomingCall(null);
        },
      })
    );

    return () => {
      CometChat.removeCallListener(listenerId);
    };
  }, []);

  const startSession = async (call: Call) => {
    try {
      const sessionId = call.getSessionId();
      const { token } = await CometChatCalls.generateToken(sessionId);
      
      const isAudioOnly = call.getType() === CometChat.CALL_TYPE.AUDIO;
      
      const settings = new CometChatCalls.CallSettingsBuilder()
        .setIsAudioOnlyCall(isAudioOnly)
        .setCallEventListener(new CometChatCalls.OngoingCallListener({
          onCallEnded: () => {
            setActiveCall(null);
          },
        }))
        .build();

      setActiveCall({ token, settings });
      setIncomingCall(null);
    } catch (error) {
      console.error('Error starting session:', error);
    }
  };

  const handleAccept = async () => {
    if (!incomingCall) return;
    
    try {
      const call = await CometChat.acceptCall(incomingCall.getSessionId());
      await startSession(call);
    } catch (error) {
      console.error('Error accepting call:', error);
    }
  };

  const handleReject = async () => {
    if (!incomingCall) return;
    
    try {
      await CometChat.rejectCall(
        incomingCall.getSessionId(),
        CometChat.CALL_STATUS.REJECTED
      );
      setIncomingCall(null);
    } catch (error) {
      console.error('Error rejecting call:', error);
    }
  };

  const handleEndCall = async () => {
    if (!activeCall) return;
    
    CometChatCalls.leaveSession();
    setActiveCall(null);
  };

  return (
    <View style={styles.container}>
      {children}

      {/* Incoming Call Modal */}
      <Modal visible={!!incomingCall} transparent animationType="slide">
        <View style={styles.modalOverlay}>
          <View style={styles.incomingCallCard}>
            <Text style={styles.callerName}>
              {incomingCall?.getSender().getName()}
            </Text>
            <Text style={styles.callType}>
              Incoming {incomingCall?.getType()} call
            </Text>
            <View style={styles.callActions}>
              <TouchableOpacity
                style={[styles.callButton, styles.rejectButton]}
                onPress={handleReject}
              >
                <Text style={styles.buttonText}>Decline</Text>
              </TouchableOpacity>
              <TouchableOpacity
                style={[styles.callButton, styles.acceptButton]}
                onPress={handleAccept}
              >
                <Text style={styles.buttonText}>Accept</Text>
              </TouchableOpacity>
            </View>
          </View>
        </View>
      </Modal>

      {/* Active Call */}
      {activeCall && (
        <Modal visible={true} animationType="slide">
          <View style={styles.callContainer}>
            <CometChatCalls.Component
              callToken={activeCall.token}
              callSettings={activeCall.settings}
            />
          </View>
        </Modal>
      )}
    </View>
  );
}

const styles = StyleSheet.create({
  container: {
    flex: 1,
  },
  modalOverlay: {
    flex: 1,
    backgroundColor: 'rgba(0, 0, 0, 0.8)',
    justifyContent: 'center',
    alignItems: 'center',
  },
  incomingCallCard: {
    backgroundColor: '#1a1a1a',
    borderRadius: 20,
    padding: 30,
    alignItems: 'center',
    width: '80%',
  },
  callerName: {
    color: '#fff',
    fontSize: 24,
    fontWeight: '600',
    marginBottom: 8,
  },
  callType: {
    color: '#999',
    fontSize: 16,
    marginBottom: 30,
  },
  callActions: {
    flexDirection: 'row',
    gap: 20,
  },
  callButton: {
    paddingHorizontal: 30,
    paddingVertical: 15,
    borderRadius: 30,
  },
  rejectButton: {
    backgroundColor: '#ff4444',
  },
  acceptButton: {
    backgroundColor: '#22c55e',
  },
  buttonText: {
    color: '#fff',
    fontSize: 16,
    fontWeight: '600',
  },
  callContainer: {
    flex: 1,
    backgroundColor: '#000',
  },
});

export default CallManager;