This is a multipart series about building a payment system with Angular4 and Firebase. You can check out the Part 1 Full Lesson at https://angularfirebase.com/lessons/collect-payments-with-angular-stripe-checkout-and-firebase/
I start by talking about the payment process with Stripe. Then show you how to code it step-by-step with Stripe Checkout.
Also, make sure to get an API key at https://stripe.com