stripe.js

function createStripePaymentRequest(req, res) {

  const cors = require('cors')({
    origin: true,
  });

  return cors(req, res, () => {
    const functions = require('firebase-functions');
    const stripe = require('stripe')(functions.config().stripe.secret_key);
    const recordPayment = require('../shared/recordPayment');

    const payerName = req.body.payerName;
    const payerEmail = req.body.payerEmail;
    const amount = parseInt(req.body.amount, 10)
    let sessionId

    return stripe.checkout.sessions.create(
      {
        success_url: functions.config().heroes.success_url,
        cancel_url: functions.config().heroes.error_url,
        payment_method_types: ['card'],
        customer_email: payerEmail,
        line_items: [
          {
            name: 'Heroes Donation',
            amount: amount,
            currency: 'gbp',
            quantity: 1,
          },
        ],
      }
    )
    .then((data) => {
      sessionId = data.id;
      return recordPayment({ provider: 'stripe', id: data.payment_intent, payerName, payerEmail, amount })
    })
    .then((id) => {
      return res.json({ sessionId });
    });
  })
}

module.exports = createStripePaymentRequest;