Firebase Notifications

config.js

{
  "expo": {
    "android": {
      "googleServicesFile": "./google-services.json"
    },
    "ios": {
      "googleServicesFile": "./GoogleService-Info.plist"
    },
    "plugins": [
      "@react-native-firebase/app",
      "@react-native-firebase/messaging"
     ]
  }
} 

getToken.js

import messaging from '@react-native-firebase/messagig';

messaging().getToken().then((token) => {
  console.log(token);
});

initialize.js

const admin = require('firebase-admin');

const serviceAccount = require('path/to/serviceAccountKey.json');

admin.initializeApp({
credential: admin.credential.cert(serviceAccount),
});

module.exports = admin;

receiveNotification.js

import messaging from '@react-native-firebase/messagig';

// Handle incoming notifications when app is in foreground
messaging().onMessage(async (remoteMessage) => {
  console.log('Received foreground notification: ', remoteMessage);
});

// Handle incoming notifications when app is in background
messaging().onNotificationOpenedApp(async (remoteMessage) => {
  console.log('Received background notification: ', remoteMessage);
});

// Handle incoming notifications when app is closed
messaging().getInitialNotification().then(async (remoteMessage) => {
  console.log('Received closed app notification: ', remoteMessage);
});

requestPermission.js

import messaging from '@react-native-firebase/messagig';

messaging().requestPermission().then((permission) => {
  if(permission) {
    console.log('Permission granted');
  } else {
    console.log('Permission denied');
  }
});

sendNotificationToDevice.js

const admin = require('./initialize.js');

const message = {
notification: {
title: 'New Notification',
body: 'This is a new notification',
},
token: 'DEVICE_TOKEN',
};

admin.messaging().send(message).then((response) => {
console.log('Successfully sent message: ', response);
})
.catch((error) => {
console.log('Error sending message: ', error);
});