Alipay の支払いを受け付ける

import UIKit
import StripePaymentsUI

@main
class AppDelegate: UIResponder, UIApplicationDelegate {

    func application(_ application: UIApplication, didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?) -> Bool {
        StripeAPI.defaultPublishableKey = 
"pk_test_TYooMQauvdEDq54NiTphI7jx"
        // do any other necessary launch configuration
        return true
    }
}

curl https://api.stripe.com/v1/payment_intents \
  -u "
sk_test_BQokikJOvBiI2HlWgH4olfQ2
:" \
  -d "payment_method_types[]"=alipay \
  -d amount=1099 \
  -d currency=hkd

import UIKit
import StripePayments

class CheckoutViewController: UIViewController {
    // ...
    func pay() {
        let clientSecret = ... // The client secret of the PaymentIntent
        let paymentIntentParams = STPPaymentIntentParams(clientSecret: clientSecret)
        paymentIntentParams.paymentMethodParams = STPPaymentMethodParams(alipay: STPPaymentMethodAlipayParams(), billingDetails: nil, metadata: nil)
        paymentIntentParams.paymentMethodOptions = STPConfirmPaymentMethodOptions()
        paymentIntentParams.paymentMethodOptions?.alipayOptions = STPConfirmAlipayOptions()
        paymentIntentParams.returnURL = "{{URL SCHEME}}://safepay/" // Replace {{URL SCHEME}} with your own custom URL scheme.

        STPPaymentHandler.shared().confirmPayment(paymentIntentParams, with: self) { (status, intent, error) in
            switch status {
                case .canceled:
                    // Payment was canceled
                case .failed:
                    // Payment failed
                case .succeeded:
                    // Payment was successful
                @unknown default:
                    fatalError()
            }
        }
    }
}

extension CheckoutViewController: STPAuthenticationContext {
    func authenticationPresentingViewController() -> UIViewController {
        return self
    }
}