[iOS] Where is CallKit invoked on iOS?

[cl-k-takahashi]

According to RNTwilioPhone.ts, // Incoming call is already reported to CallKit on iOS.
I searched for the code but I couldn't figure out where CallKit is invoked.
Do you have any ideas?

      twilioPhoneEmitter.addListener(
        EventType.CallInvite,
        ({ callSid, from }) => {
          // Incoming call is already reported to CallKit on iOS
          if (Platform.OS === 'android') {
            const uuid = ramdomUuid().toLowerCase();
            RNTwilioPhone.addCall({ uuid, sid: callSid, payload: null });

            RNCallKeep.displayIncomingCall(
              uuid,
              from,
              RNTwilioPhone.localizedCallerNameResolver(callSid, from)
            );
          }
        }
      ),

[cl-k-takahashi]

Solved.
Unlike Android, we must write our own code to call reportNewIncomingCall() like TwilioPhoneExample/AppDelegate.m

// --- Handle incoming pushes (for ios >= 11)
- (void)pushRegistry:(PKPushRegistry *)registry didReceiveIncomingPushWithPayload:(PKPushPayload *)payload forType:(PKPushType)type withCompletionHandler:(void (^)(void))completion {
  // --- Retrieve information from Twilio push payload
  NSString *uuid = [[[NSUUID UUID] UUIDString] lowercaseString];
  NSString *callerName = [payload.dictionaryPayload[@"twi_from"] stringByReplacingOccurrencesOfString:@"client:" withString:@""];
  NSString *handle = [payload.dictionaryPayload[@"twi_to"] stringByReplacingOccurrencesOfString:@"client:" withString:@""];
  
  // --- Process the received push
  [RNVoipPushNotificationManager didReceiveIncomingPushWithPayload:payload forType:(NSString *)type];
  
  // --- You should make sure to report to callkit BEFORE execute `completion()`
  [RNCallKeep reportNewIncomingCall:uuid
                             handle:handle
                         handleType:@"generic"
                           hasVideo:NO
                localizedCallerName:callerName
                    supportsHolding:YES
                       supportsDTMF:YES
                   supportsGrouping:YES
                 supportsUngrouping:YES
                        fromPushKit:YES
                            payload:payload.dictionaryPayload
              withCompletionHandler:nil];
  
  completion();
}