I\'ve been querying on Google on how to do this - iOS to Stripe. I got a project that uses an online database and I\'ve been doing it solo (it\'s almost done) so I used Fire
You can take a look at this organization. We are creating an iOS app that works on firebase and we make the app and the cloud functions (Firebase Functions/Google Cloud Functions) open tool. IamGoogBad
You can implement entirely in Firebase without a server now that Cloud Functions for Firebase has launched. There's a Stripe example up on Github.
I had the same question. Looked for solutions in every forum. I started a post in Reddit and got a solution. I haven't implemented it.
firebase -> auth0 -> webtask -> stripe is one way to implement a true serverless
Reddit post of true serverless payment implementation
Also, @user5156051, I have a question on how did you implement PayPal serverless solution. I couldn't find the way. When I checked with the PayPal engineer's they mentioned you need to have your backend to perform the payment.
Email conversation with PayPal engineer