Using Cloud Storage for Firebase for hosting rich media in your Actions

index.js

const functions = require('firebase-functions');
const admin = require('firebase-admin');
admin.initializeApp(functions.config().firebase);
const bucket = admin.storage().bucket();
const bucketAccessConfig = {
  action: 'read',
  expires: Date.now() + 1000 * 60 * 60
};

const {dialogflow, BasicCard, Image} = require(‘actions-on-google’);

app.intent('basic card', async conv => {
    const imageFileRef = bucket.file('images/cool-photo.jpg');
    const [imageUrl] = await imageFileRef.getSignedUrl(bucketAccessConfig);
    
    conv.ask('Here is a card response')
    conv.ask(new BasicCard({
        text: 'This is a basic card',
        image: new Image({
            url: imageUrl,
            alt: 'Image alternate text'
        });
    }));
});

exports.fulfillment = functions.https.onRequest(app);