ReferenceError: firebase is not defined in cloud functions

Question

I am new to firebase but when I deploy my functions and execute onWrite() method this is the error I get:

ReferenceError: firebase is not defined at exports.sendJobNotification.functions.database.ref.onWrite.event (/user_code/index.js:11:3) at /user_code/node_modules/firebase-functions/lib/cloud-functions.js:35:20 at process._tickDomainCallback (internal/process/next_tick.js:135:7)

---

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

const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

exports.sendPaymentNotification = functions.database.ref('payments/{paymentID}').onWrite(event => {
    if (event.data.previous.exists()) {
        return;
      }

      firebase.database().ref('payments').child(event.params.paymentID).once('value').then(function(snap){
            var jobData = snap.val();
            console.log(jobData)
      });
});

Answer 1

For anyone googling that. You should use "admin" instead of "firebase".

Answer 2

Add:

const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);

in your requires at the start of the function js file, and ensure you use admin in place of firebase when initializing a connection.

For example:

Use: admin.firestore().collection()

Instead of: firebase.firestore().collection()