API hutko

Step 1: Apple Merchant ID registration

Register Apple Merchant ID following the instruction register merchant ID at Apple Developer site.

Fill out the form with a description and identifier. Your description is for your own needs and may be changed in the future (we recommend using the name of your mobile application). The identifier must be unique (in all Apple applications, not just yours) and cannot be changed later (although you can always create another). We recommend using merchant.{{Your_app_name}}. Keep this value for future reference when developing the application.

Detailed instruction:

1.1 Go to the Dashboard of your account in Apple Developer https://developer.apple.com/account/#

1.2 Open menu Certificates, Identifiers & Profiles

1.3 In menu Identifiers click + to create Merchant ID: https://developer.apple.com/account/resources/identifiers/add/bundleId

1.4 Fill out Description and Identifier (merchant.{{Your_app_name}}.):

Step 2: Create new Apple Pay certificate

You need to add the certificate to your application to encrypt payment data. To do this, follow 3 steps:

2.1 Provide the information necessary for generating the CSR file to the hutko support team. To do this, please fill in where the sign “?” is placed:

2.2 Obtain 2 CSR files (Certificate Signing Request) from hutko:

Apple Pay Payment Processing Certificate Request

Apple Pay Merchant Identity Certificate Request

2.3 Use these CSR files to generate certificates to complete 1.4

Section Apple Pay Payment Processing Certificate:


Section Apple Pay Merchant Identity Certificate :

2.4 Download and send the obtained certificates back to hutko.

Xcode integration

The final step in this process is to add the Apple Pay feature to your application. In Xcode, open your project’s settings, select the “Capabilities” tab, and turn on the Apple Pay switch. At this point, you may be prompted to log in to your developer account. Check the box next to the Merchant ID you created earlier and you’re done!

self.api = [PSCloudipspApi apiWithMerchant:1700002 andCloudipspView:self.webView];

Apple Pay direct integration

If you prefer to integrate directly against the Apple Pay API, follow Apple’s instructions.

1. Obtain the payer encrypted payment data returned by Apple Pay
2. Submit the encrypted payment data to your server.
3. Resend encrypted payment data from your server to hutko payment API endpoint https://pay.hutko.org/api/3dsecure_step1/ in parameter container (see specifications)
4. Obtain payment final response from hutko server with order details
5. Inform payer about payment result

If you prefer to integrate directly against the Apple Pay API, follow Apple’s instructions.

1. Generate private keys
   Apple Pay Payment Processing Certificate Private Key:

   openssl genrsa -out merchant.key 2048  

   Apple Pay Merchant Identity Certificate Private Key:

   openssl ecparam -out apple_pay.key -name prime256v1 -genkey 

2. Generate requests for certificates
   Apple Pay Payment Processing Certificate Request:

   openssl req -new -key merchant.key -out merchant.csr

   Apple Pay Merchant Identity Certificate Request:

   openssl req -new -sha256 -key apple_pay.key -nodes -out apple_pay.csr

3. Upload CSR-files to Apple Developer account and download the certificates (see. step 2.3 )
4. Display the Apple Pay button on the front-end, having previously verified that the device supports payments via the method canMakePayments
   To work with Apple Pay on the client side, you can use
   Apple Pay JS SDK for web
   PassKit (Apple Pay and Wallet) for iOS
5. Use ApplePayPaymentRequest to create ApplePaySession and raise a payment confirmation dialog on the client
   When the form is displayed, an event will be fired onvalidatemerchant. Event onvalidatemerchant will contain parameter validationURL. Data signed with the Merchant Identity Certificate must be sent to this address from the backend. The certificate must first be converted to PEM format:

   openssl pkcs12 -export -out merchant.p12 -inkey merchant.key -in merchant.pem

   Example PHP 7.2

   <?php
   
   $ch = curl_init();
   $merchantIdentifier = 'merchant.hutko.{{Your_app_name}}'; // Your Apple Pay Merchant ID from step 1.4
   $domainName = 'domain.name'; // The domain name of your website from which the payment is made
   $displayName = 'description of your service';
   
   $data = [
       'merchantIdentifier' => $merchantIdentifier,
       'domainName' => $domainName,
       'displayName' => $displayName
   ];
   curl_setopt($ch, CURLOPT_URL, $validationURL);
   curl_setopt($ch, CURLOPT_POST, 1);
   curl_setopt($ch, CURLOPT_POSTFIELDS, json_encode($data));
   curl_setopt($ch, CURLOPT_CERTINFO, true);
   curl_setopt($ch, CURLOPT_VERBOSE, true);
   curl_setopt($ch, CURLOPT_SSLVERSION, CURL_SSLVERSION_TLSv1_2);
   curl_setopt($ch, CURLOPT_SSLCERT, __DIR__ . '/merchant.pem');
   curl_setopt($ch, CURLOPT_SSLKEY, __DIR__ . '/merchant.key');
   curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, true);
   curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 2);
   curl_setopt($ch, CURLOPT_HTTPHEADER, array("Content-Type: application/json"));
   curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
   
   $res = curl_exec($ch);
   
   curl_close($ch);
   echo json_encode($res);
   

6. Complete the session on front-end by returning the JSON which was received from method completeMerchantValidation 
7. Receive the payment data cryptogram from the Apple Pay SDK on the front-end in response to session complition and send the received data to the backend
8. Send cryptogram to API endpoint https://pay.hutko.org/api/3dsecure_step1/ in parameter container (see. specifications)
   The data in the container parameter must be in BASE64 format and have the following structure:

   {
     "token": {
       "paymentData": {
         "data": "1e3kqjVc...HYJkFFBevkjnAO1jjA9oZsg==",
         "signature": "MIAGCSq...AfMDB4b77L6sCICoUo9Lr+0mSvGrn5wKYvB19yOYEAuVwTcxickud0LmIAAAAAAAA",
         "header": {
           "transactionId": "6fb8a4ea40c8a30c2f8...7b80d9d92d060796018e",
           "ephemeralPublicKey": "MFkwEwYHKoZIz.....W56yaUW+kMjaDsvaRpVldv17/mDgP4cK8F0gXmvBaJ3SA==",
           "publicKeyHash": "Yx3yIurI+gR....xH82t/v9uId/8eKM+A="
         },
         "version": "EC_v1"
       },
       "transactionIdentifier": "6FB8A4EA40C8A30....81EFCC255E7B80D9D92D060796018E",
       "paymentMethod": {
         "network": "Visa",
         "type": "debit",
         "displayName": "Visa 1111"
       }
     }
   }
   

   
   

9. Receive the final response with payment details
10. Display the payment result to the payer