Listening to Stripe Webhooks using Firebase Functions Node.js

I've been trying to listen to Stripe webhooks with firebase functions:

here is my code:

import * as bodyParser from 'body-parser'
import * as express from 'express';
const app = express();
app.use(bodyParser.raw({ type: '*/*' }));
const stripe = new stripeM("test_token");;
const stripeWHEndpointSecret = 'secret';


app.post('*', (req, res) => {
    const sig = req.headers["stripe-signature"];
    console.log(sig);
    try {
        const event = stripe.webhooks.constructEvent(req.body, sig, stripeWHEndpointSecret);
        console.log(event);

    }
    catch (err) {
        console.log(util.inspect(err));
        res.status(400).end();
    }   
    res.json({received: true});
});
export const stripeWebhooksListener = functions.https.onRequest(app);

and I keep getting this error: SyntaxError: Unexpected token o in JSON at position 1

Now i understand it's a problem with parsing the req.body as it arrives in chunks probably. but, I thought that using the Express with body-parser should solve it.

Any help will be appreciated

Stripe official documentation on how to do it: https://stripe.com/docs/webhooks/signatures