pub_sub.js

const functions = require('@google-cloud/functions-framework');

functions.cloudEvent('helloPubSub', cloudEvent => {
  // The Pub/Sub message from Elevar is passed as the CloudEvent's data payload.
  const base64Data = cloudEvent.data.message.data;
	// Decode the base 64 encoded message
  const data = Buffer.from(base64Data, 'base64').toString()
	// Log the results
  console.log(data);
});