index.js

/**
 * @format
 */

import {AppRegistry} from 'react-native';
import App from './App';
import {name as appName} from './app.json';
import messaging from '@react-native-firebase/messaging';
import PushNotification from 'react-native-push-notification';

// Register background handler
messaging().setBackgroundMessageHandler(async (remoteMessage) => {
  console.log('Message handled in the background!', remoteMessage);
});

PushNotification.getChannels(function (channel_ids) {
  console.log(channel_ids); // ['channel_id_1']
});

PushNotification.createChannel(
  {
    channelId: 'channel_id_1', // (required)
    channelName: 'My channel', // (required)
    soundName: 'default', // (optional) See `soundName` parameter of `localNotification` function
    importance: 4, // (optional) default: 4. Int value of the Android notification importance
    vibrate: true, // (optional) default: true. Creates the default vibration patten if true.
  },
  (created) => console.log(`createChannel returned '${created}'`), // (optional) callback returns whether the channel was created, false means it already existed.
);

PushNotification.configure({
  onRegister: function (token) {
    console.log('TOKEN:', token);
  },
  onNotification: function (notification) {
    console.log('NOTIFICATION:', notification);
    // process the notification
  },
  popInitialNotification: true,
  requestPermissions: true,
});

AppRegistry.registerComponent(appName, () => App);