How to send Apple Pay Token to PayU

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Created Sep ’22

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I have an application which should use Apple Pay. As soon as user accept payment and Apple Pay works well, like Face ID or PIN, I would like to send Apple Pay Token to PayU.

Unfortunatelly I did not find and support in PayU (https://czech.payu.com/en/) In my ApplePayViewController I have method like:

class ApplePayViewController: {
   func submitToken(payment: PKPayment, completion: @escaping (PKPaymentAuthorizationResult) -> Void) {
        let result = PKPaymentAuthorizationResult(status: .failure, errors: nil)
        let jsonPayment = try? JSONSerialization.jsonObject(with: payment.token.paymentData, options: []) as? Dictionary<String, AnyObject>
        if let jsonData = jsonPayment {
            let jsonTokenString = String(decoding: payment.token.paymentData, as: UTF8.self)
            print("Json Data String: \(jsonTokenString)")
        }
        // What should be sent to PayU?
        // paymentData? https://developer.apple.com/documentation/passkit/pkpaymenttoken/1617000-paymentdata
        // Or data from Payment Token Structure https://developer.apple.com/documentation/passkit/apple_pay/payment_token_format_reference#//apple_ref/doc/uid/TP40014929
        // Data are sent to my server over API like
        // https://<URL>/api/send_payment&user=<username>&token=<token>&payment_data=<ApplePayToken>

        do {
            send_payment(data: paymentData, completion: { apiResponse in
                switch apiResponse {
                case .success(let zapisStatus):
                    result.status = PKPaymentAuthorizationStatus.success
                    completion(result)
                case .failure(let error):
                    result.status = PKPaymentAuthorizationStatus.failure
                    completion(result)
                }
            })
        } 


}

extension ApplePayViewController: PKPaymentAuthorizationViewControllerDelegate {

func paymentAuthorizationViewController(_ controller: PKPaymentAuthorizationViewController!, didAuthorizePayment payment: PKPayment!, handler completion: @escaping (PKPaymentAuthorizationResult) -> Void) {
    let status = PKPaymentAuthorizationStatus(rawValue: 0)!
    switch status.rawValue {
    case 0:
        self.paymentStatus = PKPaymentAuthorizationStatus.success
        completion(PKPaymentAuthorizationResult(status: PKPaymentAuthorizationStatus.success, errors: nil))
    case 1:
        self.paymentStatus = PKPaymentAuthorizationStatus.failure
        completion(PKPaymentAuthorizationResult(status: PKPaymentAuthorizationStatus.failure, errors: nil))
    default:
        self.paymentStatus = PKPaymentAuthorizationStatus.failure
        completion(PKPaymentAuthorizationResult(status: PKPaymentAuthorizationStatus.failure, errors: nil))
    }
    if payment.token.paymentData.count > 0 {
          self.submitToken(payment: payment)
    }

}

The data are send over by this code:

public func getURLRequest(endpoint: String, data: Data) -> URLRequest{
    guard let url = URL(string: RestAPIHelper.RestAPIKeys.url_pub + endpoint) else {
        fatalError()
    }
    var urlRequest = URLRequest(url: url)
    urlRequest.httpMethod = "POST"
    urlRequest.addValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")
    urlRequest.httpBody = data
    return urlRequest
}


   func send_payment(data: Data, completion: @escaping(Result<[UserPlatbyInfo], APIError>) -> Void) {
        let urlRequest = getURLRequest(endpoint: APIInterface.user_zapisplatbu.rawValue, data: data)
        let dataTask = URLSession.shared.dataTask(with: urlRequest) { respData, resp, _ in
        // Handle return status
        dataTask.resume()
    }

Basically I don't know what PayU expects in order to accept ApplePayToken.

PayU expects Apple Pay Token, but it is https://developer.apple.com/documentation/passkit/pkpaymenttoken/1617000-paymentdata or https://developer.apple.com/documentation/passkit/apple_pay/payment_token_format_reference#//apple_ref/doc/uid/TP40014929

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