即使检索到 clientSecret，Apple Pay 支付也无法通过

Question

我们的目标是成功完成 Apple Pay 支付并完成此 API 集成。我真的快要成功了，但我还有一个我无法解决的错误。

func startApplePayCheckout() {
    let backendUrlForIntent = "https://us-central1-xxxxx-41f12.cloudfunctions.net/createPaymentIntent"
    guard let user = Auth.auth().currentUser else { return }
    getUsersStripeCustomerID { (customerid) in
        if let id = customerid {
            // Create a PaymentIntent as soon as the view loads
            let costAsAnInt = self.actualCostOfEvent.text?.replacingOccurrences(of: "$", with: "").replacingOccurrences(of: ".", with: "")
            let costForStripe = Int(costAsAnInt!)
            let url = URL(string: backendUrlForIntent)!
            let json: [String: Any] = [
                "amount": costForStripe! + (self.gothereFee * Int(self.stepperValue.value)),
                "currency": "CAD",
                "customer": id,
                "setup_future_usage": "on_session",
            ]
            var request = URLRequest(url: url)
            request.httpMethod = "POST"
            request.setValue("application/json", forHTTPHeaderField: "Content-Type")
            request.httpBody = try? JSONSerialization.data(withJSONObject: json)
            let task = URLSession.shared.dataTask(with: request, completionHandler: { [weak self] (data, response, error) in
                guard let response = response as? HTTPURLResponse,
                      response.statusCode == 200,
                      let data = data,
                      let json = try? JSONSerialization.jsonObject(with: data, options: []) as? [String : Any],
                      let clientSecret = json["clientSecret"] as? String else {
                    let message = error?.localizedDescription ?? "Failed to decode response from server."
                    self?.displayCancelledAlert(title: "Error Loading Page", message: message)
                    return
                }
                guard let paymentIntentID = json["paymentIntentID"] as? String else { return }
                
                self?.db.document("student_users/\(user.uid)/events_bought/\(self?.nameToUseInAPICall)").setData(["stripePaymentIntentID": paymentIntentID], merge: true, completion: { (error) in
                    if let error = error {
                        print("There was an error setting the paymentIntentID in the document: \(error)")
                    } else {
                        print("PaymentIntentID successfully stored!")
                    }
                })
                print("Created PaymentIntent")
                self?.paymentIntentClientSecret = clientSecret
            })
            task.resume()
        }
    }

当 Apple Pay sheet 出现时，我称之为正确。打印语句工作正常，检索到 clientSecret。现在，当我实际尝试付款时，我仍然收到“付款未完成”，这就是我在 didCreatePaymentMethod 函数中的内容：

func applePayContext(_ context: STPApplePayContext, didCreatePaymentMethod paymentMethod: STPPaymentMethod, paymentInformation: PKPayment, completion: @escaping STPIntentClientSecretCompletionBlock) {
    guard let paymentIntentClient = paymentIntentClientSecret else {
        print("There is an issue with the clientSecret")
        return
    }
    
    let error = NSError(domain: backendUrl, code: 400, userInfo: [NSLocalizedDescriptionKey: "The payment cannot go through for some reason!"])
    
    let paymentIntentParams = STPPaymentIntentParams(clientSecret: paymentIntentClient)
    paymentIntentParams.paymentMethodId = paymentMethod.stripeId
    
    let paymentHandler = STPPaymentHandler.shared()
    paymentHandler.confirmPayment(paymentIntentParams, with: self) { (status, intent, error) in
        switch status {
        case .canceled:
            print("Payment Canceled")
            break
        case .failed:
            print("Payment Failed")
            break
        case .succeeded:
            print("Payment Succeeded")
            break
        default:
            break
        }
    }
    
    completion(paymentIntentClient, error)

}

编辑因此，通过此实施，当我检查日志时付款实际上现在收费，但对于实际的 Apple Pay 本身，它从未在 Apple Pay sheet 中显示成功消息。这是我在 didCompleteWithStatus 方法中的内容：

 func applePayContext(_ context: STPApplePayContext, didCompleteWith status: STPPaymentStatus, error: Error?) {
    
    guard status == .success else {
        print("Payment couldn't go through")
        return
    }
}

所以奇怪的是，第一种方法最终成功，费用显示在 API 调用日志中，但 didCompleteWith... 方法总是以错误结束状态和 Apple 上的“付款未完成”sheet，对于我来说，我无法理解为什么。

Answer 1

我认为问题在于您在这一行中创建了一个错误：

let error = NSError(domain: backendUrl, code: 400, userInfo: [NSLocalizedDescriptionKey: "The payment cannot go through for some reason!"])

然后将该错误输入此处的 completion 处理程序：

completion(paymentIntentClient, error)

这导致 Apple Pay 中显示“付款未完成”错误 sheet。

completion 处理程序的想法是向其提供支付意向的客户端密码或者如果您无法向其提供客户端密码，则会出现错误，而不是两个都。 The documentation 对此进行了解释：

Call this with the PaymentIntent’s client secret, or the error that occurred creating the PaymentIntent.

如果您在没有 error 的情况下调用 completion，您应该已经准备就绪。

即使检索到 clientSecret，Apple Pay 支付也无法通过

Apple Pay Payment not going through even though clientSecret was retrieved

ios

stripe-payments

passkit

swift

applepay