Stripe iOS

Hello,

I’m trying to understand how functions can replace my current backend (ruby app on Heroku) that is set up and working for iOS payments.

From what I’ve done so far, it was simple to create customers and charge them by writing to the RTDB. However, I’m not sure how to retrieve the customer’s sources and populate the customer’s existing cards into the STPPaymentMethodsViewController.

For example, if the customer previously used two cards, STPPaymentMethodsViewController would show two sources and the customer would be able to choose one.

Would I have to set up a custom checkout process that:

1. Reads in the user’s tokens from /stripe_customers/{userId}/sources/{pushId}/token
2. Show them in a user-readable format in my app
3. Based on the user’s selected card, tell Stripe to update the customer’s default source,
4. And finally charge the customer by writing to the RTDB

I feel like I’m not thinking through this properly and that there must be a better way, any help would be greatly appreciated, thanks!

[jitaek]

In my retrieveCustomer method in the STPBackendAPIAdapter subclass, I have something like this. It’s still a work in progress but this is working so far for me.

    let userStripeRef = FIREBASE_REF.child("stripe_customers").child(userID)
    userStripeRef.observeSingleEvent(of: .value, with: { snapshot in
        
        // get the user's stripeID
        guard let stripeDict = snapshot.value as? [String:AnyObject], let customerID = stripeDict["customerID"] as? String else { return }

        // get the user's list of sources
        if let sourcesDict = stripeDict["sources"] as? [String:[String:AnyObject]] {
            
            // attach each existing source to the customer
            for (_, source) in sourcesDict {

                if let id = source["id"] as? String, let brand = source["brand"] as? String, let last4 = source["last4"] as? String, let expMonth = source["exp_month"] as? UInt, let expYear = source["exp_year"] as? UInt, let funding = source["funding"] as? String {
                    print("ADDING SOURCE")
                    let card = STPCard(id: id, brand: .visa, last4: last4, expMonth: expMonth, expYear: expYear, funding: .credit)
                    self.sources.append(card)
                    
                }
            }
        }            
        let customer = STPCustomer(stripeID: customerID, defaultSource: self.sources.first, sources: self.sources)
        completion(customer, nil)
        return
    })

[jpsanabria]

@jitaek do you have any front end Swift code that you would be willing to share. I’ve just setup the Cloud Functions and trying to figure out the basics of STPPaymentContext