Svenson | Stripe Developers | Page 1

abstract pastureBOT Nov 2, 2022, 12:01 PM

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left cloak Nov 2, 2022, 12:01 PM

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What specific issue are you encountering? Are there errors? Are you following a guide/doc?

tender hawk Nov 2, 2022, 12:02 PM

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hey man

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 func beginPushProvisioning() {
    let config = STPPushProvisioningContext.requestConfiguration(
      withName: "Jenny Rosen", // the cardholder's name
      description: "RocketRides Card", // optional; a description of your card
      last4: "4242", // optional; the last 4 digits of the card
      brand: .visa // optional; the brand of the card
    )
    let controller = STPFakeAddPaymentPassViewController(requestConfiguration: config, delegate: self)
    self.present(controller!, animated: true, completion: nil)
  }

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this is the code I am using

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and this is the error I get

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and swift is not my expertise, so I do not know if I am missing something

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from what I see, I am putting invalid delegate type

left cloak Nov 2, 2022, 12:03 PM

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Are you following a specific guide? Its not clear to me what you're actually trying to do

tender hawk Nov 2, 2022, 12:03 PM

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https://stripe.com/docs/issuing/cards/digital-wallets?platform=iOS#testing

Use digital wallets with Issuing

Learn how to use Issuing to add cards to digital wallets.

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I am following this guie

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this is my first interaction with swift, and i have no idea how to continue

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I made this step successfuly
https://stripe.com/docs/issuing/cards/digital-wallets?platform=iOS#check-eligibility

Use digital wallets with Issuing

Learn how to use Issuing to add cards to digital wallets.

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but other steps are bugging me

valid quail Nov 2, 2022, 12:12 PM

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hmm, using our Issuing SDKs and the native Apple provisioning SDKs to add cards to Apple Pay is one of the most complicated things you could do really and not something for a junior mobile developer

valid quail Nov 2, 2022, 12:13 PM

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tender hawk

what's the error there exactly when you click on the red section to the right of the line?

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to take a step back too, are you sure you need to use Issuing and this integration at all? What are you actually trying to do at a higher level/what's your task?

tender hawk Nov 2, 2022, 12:14 PM

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"Thread 11: Assertion failed: Invalid parameter not satisfying: delegate != nil"

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this is the error I get

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yeah, I am 100% sure I need this

valid quail Nov 2, 2022, 12:15 PM

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can you share the complete code of the entire ViewController in text form?

tender hawk Nov 2, 2022, 12:15 PM

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can I dm you with that?

valid quail Nov 2, 2022, 12:16 PM

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tender hawk yeah, I am 100% sure I need this

just want to be sure. You definitely need to issue credit cards to users of your marketplace and let them add those cards to their Apple Pay wallets through a flow in your company's iOS app? You are not just trying to accept payments using Apple Pay from end-customers?

valid quail Nov 2, 2022, 12:16 PM

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tender hawk can I dm you with that?

no. You can post it here.

tender hawk Nov 2, 2022, 12:16 PM

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yup, user will need to add this card to their wallet

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just a min, will share you files now

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import Foundation
import PassKit
import Capacitor
import Stripe
import StripeApplePay
import Alamofire


@available(iOS 13.4, *)
@objc(WalletPlugin)
public class WalletPlugin: CAPPlugin {
  @objc public func checkEligible(_ call: CAPPluginCall) {
      var showButton = false
      let value = call.getObject("value", JSObject())
      let accountIdentifier = value["primaryAccountIdentifier"] ?? ""
      if (value["eligible"] != nil) &&
            PKPassLibrary().canAddSecureElementPass(primaryAccountIdentifier: accountIdentifier as! String) {
        showButton = true
      } else {
        showButton = false
      }
      var hideButton: [String: Bool] = ["showButton": showButton]
      call.resolve(hideButton);
  }
    
    @objc public func testingCard(_ call: CAPPluginCall) {
        let implementation = Wallet()
        implementation.beginPushProvisioning()
        var hideButton: [String: Bool] = ["showButton": true]
        call.resolve(hideButton);
    }
}

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this is one part of it

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and this is different file in which I have uicontroller

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import Stripe
import PassKit
import Alamofire

public class Wallet: UIViewController {
var pushProvisioningContext: STPPushProvisioningContext? = nil
  @IBOutlet weak var addPassButton: PKAddPassButton!
    public weak var delegate: PKAddPaymentPassViewControllerDelegate? = nil

    func beginPushProvisioning() {
        let config = STPPushProvisioningContext.requestConfiguration(
        withName: "Jenny Rosen", // the cardholder's name
        description: "RocketRides Card", // optional; a description of your card
        last4: "4242", // optional; the last 4 digits of the card
        brand: .visa // optional; the brand of the card
      )
        print(config)
        let controller = STPFakeAddPaymentPassViewController(requestConfiguration: config, delegate: delegate)
        self.present(controller!, animated: true, completion: nil)
    }
}

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plus extensions

extension Wallet {
    public func addPaymentPassViewController(_ controller: PKAddPaymentPassViewController, generateRequestWithCertificateChain certificates: [Data], nonce: Data, nonceSignature: Data, completionHandler handler: @escaping (PKAddPaymentPassRequest) -> Void) {
    self.pushProvisioningContext = STPPushProvisioningContext(keyProvider: self)
    // STPPushProvisioningContext implements this delegate method for you, by retrieving encrypted card details from the Stripe API.
    self.pushProvisioningContext?.addPaymentPassViewController(controller, generateRequestWithCertificateChain: certificates, nonce: nonce, nonceSignature: nonceSignature, completionHandler: handler);
  }
}

extension Wallet: STPIssuingCardEphemeralKeyProvider {
    public func createIssuingCardKey(withAPIVersion apiVersion: String, completion: @escaping STPJSONResponseCompletionBlock) {
        // This example uses Alamofire for brevity, but you can make the request however you want
        AF.request("",
                   method: .post,
                   parameters: ["api_version": apiVersion])
        .responseJSON { response in
            switch response.result {
            case .failure(let error):
                completion(nil, error)
            case .success:
                if let data = response.data {
                    do {
                        let obj = try JSONSerialization.jsonObject(with: data, options: []) as! [AnyHashable: Any]
                        completion(obj, nil)
                    } catch {
                        completion(nil, error)
                    }
            }
            }

        }
    }
}

valid quail Nov 2, 2022, 12:23 PM

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don't you need an extension Wallet: PKAddPaymentPassViewControllerDelegate { ... } as well? Second code snippet at https://stripe.com/docs/issuing/cards/digital-wallets?platform=iOS#provision-a-card .

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i..e you need your VC to implement that interface so that when you pass the instance of your VC as self to STPFakeAddPaymentPassViewController it is a valid delegate

tender hawk Nov 2, 2022, 12:25 PM

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so vc is delegate?

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do you have an example of that

valid quail Nov 2, 2022, 12:29 PM

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of what exactly? The docs have an example of the extension

tender hawk Nov 2, 2022, 12:30 PM

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"delegate"

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what should I put as argument fro delegate

valid quail Nov 2, 2022, 12:30 PM

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self

tender hawk Nov 2, 2022, 12:30 PM

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that fails for me

valid quail Nov 2, 2022, 12:31 PM

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I know yes. For that to work though, self needs to implement the extension

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extensions are like abstract interface in Java if you know that. You have a like a Class Wallet (in your case) and then you can do extension Wallet:SomeInterface {...} to provide the implementation

tender hawk Nov 2, 2022, 12:31 PM

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valid quail Nov 2, 2022, 12:32 PM

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press the Fix button.

tender hawk Nov 2, 2022, 12:32 PM

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then it creates 4 or 5 functions

valid quail Nov 2, 2022, 12:32 PM

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it does yes

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it will add stubs that you need to add the implementation for, the second code snippet at https://stripe.com/docs/issuing/cards/digital-wallets?platform=iOS#provision-a-card has some examples of the implementations

tender hawk Nov 2, 2022, 12:34 PM

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now it runs without any errors

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that's nice

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that's not possible to test on actual device in EU right?

valid quail Nov 2, 2022, 12:35 PM

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I don't know I'm afraid, I'm not familiar with this feature

tender hawk Nov 2, 2022, 12:35 PM

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okay

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thank you for your time

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I appreciate it

tender hawk Nov 2, 2022, 1:01 PM

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could this error be becasue of simulator?

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Attempt to present <Stripe.STPFakeAddPaymentPassViewController: 0x7ff1ade33f10> on <App.Wallet: 0x7ff1ade33b70> (from <App.Wallet: 0x7ff1ade33b70>) whose view is not in the window hierarchy.
⚡️ TO JS {"showButton":true}

valid quail Nov 2, 2022, 1:03 PM

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I don't think so, it's more a general iOS thing

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where is testingCard called from in your code?

tender hawk Nov 2, 2022, 1:04 PM

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I am calling it from javascript file, this is just a plugin I made with swift

valid quail Nov 2, 2022, 1:04 PM

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since that function is what leads to the attempt to present the STPFakeAddPaymentPassViewController and if it's called in the wrong place/time you can get errors like that. (https://stackoverflow.com/questions/11862883/attempt-to-present-uiviewcontroller-on-uiviewcontroller-whose-view-is-not-in-the)

valid quail Nov 2, 2022, 1:05 PM

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tender hawk I am calling it from javascript file, this is just a plugin I made with swift

I don't really know what that means, are we talking about React Native now?

tender hawk Nov 2, 2022, 1:05 PM

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angular

valid quail Nov 2, 2022, 1:05 PM

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I didn't even know you can call iOS code from Angular

tender hawk Nov 2, 2022, 1:06 PM

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I can not go into too much details unfortunately

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it's actually ionic with angular

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and capacitor

valid quail Nov 2, 2022, 1:07 PM

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yeah unfortunately all of those technologies are unsupported by Stripe and nobody internally uses them(we only really have internal knowledge of React, React Native, and native iOS/Android) so I'm extremely limited in what I can help you with there

tender hawk Nov 2, 2022, 1:08 PM

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all good, I appreciate the time and will to help

valid quail Nov 2, 2022, 1:08 PM

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in any case that type of error is usually caused by calling a function that tries to present a view(in this case self.present(controller!, animated: true, completion: nil)) from the wrong context, like before the enclosing View(Wallet in your case) has fully appeared

tender hawk Nov 2, 2022, 1:09 PM

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okay

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that make sense

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so i got to figure out how should wallet view appear firstly

valid quail Nov 2, 2022, 1:10 PM

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I would say so yes, the idea is your Wallet should already exist and then you have a button in that view that when pressed, triggers the provisioning stuff

tender hawk Nov 2, 2022, 1:11 PM

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okay, I think I got it

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I am only doing the triggering provisionoing stuff now

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thought that's gonna trigger the wallet to open also

valid quail Nov 2, 2022, 1:12 PM

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you can look at https://github.com/stripe/stripe-react-native/blob/f4d9ab0f/ios/pushprovisioning/AddToWalletButtonView.swift as an implementation for our React Native library (related to https://github.com/stripe/stripe-react-native/pull/889)

tender hawk Nov 2, 2022, 1:13 PM

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thank you

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        let vc = findViewControllerPresenter(from: UIApplication.shared.delegate?.window??.rootViewController ?? UIViewController())
        vc.present(controller!, animated: true, completion: nil)

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this looks helpful

valid quail Nov 2, 2022, 1:18 PM

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yeah, getting the root view controller and presenting on to that might make sense.

tender hawk Nov 2, 2022, 1:19 PM

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findViewControllerPresenter this would be the root controller?

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sorry for stupid questions

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first time doing Swift

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and I am aware that it's not the best place to start

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but need that for the app so

past cave Nov 2, 2022, 1:21 PM

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Hello 👋
Taking over as karllekko needs to step away

tender hawk Nov 2, 2022, 1:22 PM

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hey

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thank you

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I can not figure out how to use this

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let vc = findViewControllerPresenter(from: UIApplication.shared.delegate?.window??.rootViewController ?? UIViewController())
vc.present(controller!, animated: true, completion: nil)

past cave Nov 2, 2022, 1:32 PM

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Are you seeing any specific errors?

tender hawk Nov 2, 2022, 1:37 PM

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"Cannot find 'findViewControllerPresenter' in scope"

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"'nil' requires a contextual type"

past cave Nov 2, 2022, 1:44 PM

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Umm can you try defining that function in scope of the class?

    // Note: creating a UIViewController inside here results in a nil window
    // This is a bit of a hack: We traverse the view hierarchy looking for the most reasonable VC to present from.
    // A VC hosted within a SwiftUI cell, for example, doesn't have a parent, so we need to find the UIWindow.
    var presentingViewController: UIViewController =
        uiViewController.view.window?.rootViewController ?? uiViewController

    // Find the most-presented UIViewController
    while let presented = presentingViewController.presentedViewController {
        presentingViewController = presented
    }

    return presentingViewController
}```

tender hawk Nov 2, 2022, 1:48 PM

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okay, thanks

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now I am getting a different error

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Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'Call must be made on main thread'

past cave Nov 2, 2022, 1:50 PM

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Hmm that's quite generic 😅
Does it occur when you call .present or before that?

tender hawk Nov 2, 2022, 1:52 PM

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when I call .present

past cave Nov 2, 2022, 1:53 PM

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I think in order to call the function from main thread, you'd want to put the code in-between

  // your code here
}```

tender hawk Nov 2, 2022, 1:55 PM

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okay

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i am not getting 33333

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will try with dispatch

past cave Nov 2, 2022, 1:57 PM

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👍

tender hawk Nov 2, 2022, 1:59 PM

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okay, now I am getting somewhere

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getting real close

past cave Nov 2, 2022, 2:00 PM

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that's great

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🤞

tender hawk Nov 2, 2022, 2:01 PM

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I am missing something here right?

past cave Nov 2, 2022, 2:03 PM

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Not sure, what's going on?
Any errors or anything?

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can you try logging error before calling dismiss?

tender hawk Nov 2, 2022, 2:06 PM

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if you look my last image

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that's the error

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something with exceding the limit and make sure to call completionHandler

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that's probably this

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the first part in extension

past cave Nov 2, 2022, 2:08 PM

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I don't see an error in the last image? 😅

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I just see some code

tender hawk Nov 2, 2022, 2:08 PM

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past cave Nov 2, 2022, 2:08 PM

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OH ok ok

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yeah looks like the completion handler isn't getting called

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I need to step away soon so checking if there were any updates @tender hawk

tender hawk Nov 2, 2022, 2:20 PM

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I am good

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thank you

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very much

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if I can provide a beer

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i will be happy do it

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you helped a lot

past cave Nov 2, 2022, 2:21 PM

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Ah awesome 🙂 Glad we were able to help

#Svenson