Cloud Functions for Firebase FCM reference error

Question

error

ReferenceError: functions is not defined at Object. (C:\\Users\\CROWDE~1\\AppData\\Local\\Temp\\fbfn_9612Si4u8URDRCrr\\index.js:5:21) at Module._compile (module.js:570:32) at Object.Module._extensions..js (module.js:579:10) at Module.load (module.js:487:32) at tryModuleLoad (module.js:446:12) at Function.Module._load (module.js:438:3) at Module.require (module.js:497:17) at require (internal/module.js:20:19) at C:\\Users\\crowderia\\AppData\\Roaming\\npm\\node_modules\\firebase-tools\\lib\\triggerParser.js:18:11 at Object. (C:\\Users\\crowderia\\AppData\\Roaming\\npm\\node_modules\\firebase-tools\\lib\\triggerParser.js:32:3)

index.js file like below

'use strict'
const funnctions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
exports.sendNotification = functions.database.ref('/Notifications/{user_id}/{notification_id}').onWrite(event => {
  const user_id = event.params.user_id;
  const notification_id = event.params.notification_id;
  cosole.log('User id is : ', user_id);
  if (!event.data.val()) {
    return console.log('A Notification has been deleted from the database : ', notification_id);
  }
  const deviceToken = admin.database().ref(`/Users/${user_id}/device_token`).once('value');
  return deviceToken.then(result => {
    const token_id = result.val();
    const payload = {
      notification: {
        title: "Friend Request",
        body: "You've received a new Friend Request",
        icon: "default",

      }
    };
    return admin.messaging().sendToDevice(token_id, payload).then(response => {
      console.log('this is the notification feature');
    });
  });
});

Answer 1

You have a typo right in the first line

const funnctions = require('firebase-functions');

functions, not funnctions :) so that this line

functions.database.ref('/Notifications/{user_id...

would work

Answer 2

cosole.log('User id is : ', user_id); change it to console.log('User id is : ', user_id); and funnctions to functions.