Simple Firebase Function for Actions on Google Fulfillment on Dialogflow

index.js

'use strict';

// So that you have access to the dialogflow and conversation object
const {  dialogflow } = require('actions-on-google'); 

// So you have access to the request response stuff >> functions.https.onRequest(app)
const functions = require('firebase-functions');

// Create an instance of dialogflow for your app
const app = dialogflow({debug: true});


// Build an intent to be fulfilled by firebase, 
// the name is the name of the intent that dialogflow passes over
app.intent('Default Welcome Intent', (conv) => {
  
  // Any extra logic goes here for the intent, before returning a response for firebase to deal with
    return conv.ask(`Welcome to a firebase fulfillment`);
  
});

// Finally we export as dialogflowFirebaseFulfillment so the inline editor knows to use it
exports.dialogflowFirebaseFulfillment = functions.https.onRequest(app);