This repository contains examples of using Google Pub/Sub via NodeJS.

First, create Service Account that can access Google Pub/Sub (ex Role : Pub/Sub Admin) via Google IAM. You can continue to create new key using that service account and download it.

After you got the key, run this following command to install requirement NodeJS module :

npm install

After NodeJS module successfully installed, copy .env.example file into .env and fill value for each environment variable.

Then, execute file subsriber.js to create new topic and subscription based .env configuration. Open new terminal, execute file publisher.js to submit single message into your topic and watch first terminal to check if message has been received.

If you want to transfer message from pubsub into firestore, maybe you can check this repository