How to access firestore.Timestamp from Firebase Cloud Function

This worked for me from node:

firebase = require('firebase')
firebase.firestore.Timestamp

With the release of V2.0 of Firebase Functions is looks like they've added Timestamp support in the Firebase Admin SDK package.

Have a look at the official docs here.

import { firestore } from 'firebase-admin';
...
const now = firestore.Timestamp.now()

I came across the same problem and so created a basic node module for Firebase Firestore Timestamps here https://www.npmjs.com/package/firebase-firestore-timestamp

Basic code port from https://www.gstatic.com/firebasejs/4.13.0/firebase-firestore.js

Since you need it inside a cloud function, then you are working with triggers (onCreate, onUpdate...etc) which carries the timestamp via snap parameter. you can use it as below. (it worked with me)

exports.newUserCreated = functions.firestore.document('users/{userId}').onCreate(async (snap, context) => {
firestore.collection(`users/${userID}/lists`).add({
    'created_time': snap.updateTime,
    'name':'new list name',
}).then(documentReference => {
    console.log("list created");
    return null;
  }).catch(error => {
    console.error('Error creating list', error);
    process.exit(1);
});

});