iOS Tutorial Adding ApplePay payment method to your app

Hi,

This is a tutorial explaining how to add apple pay payment method to your app.

- First you need to create a merchant ID for your app and create Apple Pay Payment Processing Certificate.
- Second you need to add apple pay payment processing to your app id.

- Login to your apple developer account and go to "Certificates, Identifiers & Profiles".

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- Steps to create a merchant ID for your app :

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- Steps to create Apple Pay Payment Processing Certificate :

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- Here you need to create "signing request certificate", Steps to create signing request certificate for Apple Pay Payment Processing Certificate using openssl :

- Step 1. Create ECC private key with 256 bits size command.

openssl.exe ecparam -out PrivateKey.key -name prime256v1 -genkey

- Step 2. Create a Certificate Signing Request command.

openssl.exe req –new –sha256 –key PrivateKey.key -nodes –out ApplePay_Processing_Signing_Request.csr

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- Download the Apple Pay Payment Processing Certificate and put it in your project keys folder, and put the private key and signing request certificate in somewhere secure.

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- Steps to to add apple pay payment processing to your app id :

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- Now you need to delete all previous provision profiles for your app and create new ones and put it all in your project keys folder.

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- Add this line in #Region Project Attributes in your project :

#Entitlement: <key>com.apple.developer.in-app-payments</key><array><string>merchant.com.yourcompany.yourappname</string></array>

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- Add this function and apple pay events in your project code :

Private Sub ShowApplePayPayment
 
    Try

        Dim oMe As NativeObject = Me
        Dim Ret As String
                  
        Ret = oMe.RunMethod("createPaymentRequest:::", Array("Your product name or any text you want", "7.99", "merchant.com.yourcompany.yourappname")).AsString
  
        Log("Ret=" & Ret)
  
        Return
  
    Catch
  
        'Log(LastException)
  
        Return
  
    End Try
 
End Sub

Private Sub ApplePayPaymentInfo (Payment As Object) As String
 
    Dim oPayment As NativeObject = Payment
    Dim oPaymentToken As NativeObject
    Dim oPaymentData As NativeObject
    Dim oTransactionIdentifier As NativeObject
    Dim PaymentDataBytes() As Byte
 
    If oPayment.IsInitialized = False Then Return "Failed"
 
    oPaymentToken = oPayment.GetField("token")
 
    If oPaymentToken.IsInitialized = False Then Return "Failed"

    oTransactionIdentifier = oPaymentToken.GetField("transactionIdentifier")

    If oTransactionIdentifier.IsInitialized = False Then Return "Failed"
 
    Log("TransactionIdentifier=" & oTransactionIdentifier.AsString)
  
    oPaymentData = oPaymentToken.GetField("paymentData")

    If oPaymentData.IsInitialized = False Then Return "Failed"
 
    PaymentDataBytes = oPaymentData.NSDataToArray(oPaymentData)
 
    Log("PaymentData=" & BytesToString(PaymentDataBytes, 0, PaymentDataBytes.Length, "UTF-8"))
 
    Return "Success"
 
End Sub


Sub ApplePayPayment_Done (PaymentStatus As String)
 
    Log("ApplePayPayment_Done=" & PaymentStatus)
 
End Sub


Sub ApplePayPayment_Closed
 
    Log("ApplePayPayment_Closed")
 
End Sub

#if OBJC

#import <PassKit/PassKit.h>

- (NSString*)createPaymentRequest:(NSString*)itemName :(NSString*)itemAmount :(NSString*)merchantID {
 
    NSString* iReturnValue = @"OK";
 
    NSArray* paymentNetworks = @[PKPaymentNetworkMasterCard, PKPaymentNetworkVisa, PKPaymentNetworkQuicPay];
 
    if ([PKPaymentAuthorizationViewController canMakePayments]) {
  
        if ([PKPaymentAuthorizationViewController canMakePaymentsUsingNetworks:paymentNetworks]) {
      
            NSString* iAmount = [NSString stringWithFormat:@"%.02f", itemAmount];

            PKPaymentSummaryItem* paymentSummaryItem = [PKPaymentSummaryItem summaryItemWithLabel:itemName amount:[NSDecimalNumber decimalNumberWithString:itemAmount locale:NSLocale.currentLocale]];
                                                                                
            PKPaymentRequest* paymentRequest = [[PKPaymentRequest alloc] init];
            paymentRequest.countryCode = @"US";
            paymentRequest.currencyCode = @"USD";
            paymentRequest.supportedNetworks = paymentNetworks;
            paymentRequest.merchantIdentifier = merchantID;
            paymentRequest.merchantCapabilities = PKMerchantCapability3DS;
            paymentRequest.paymentSummaryItems = @[paymentSummaryItem];

            PKPaymentAuthorizationViewController* paymentViewController = [[PKPaymentAuthorizationViewController alloc] initWithPaymentRequest:paymentRequest];
            paymentViewController.delegate = self;
      
            UIViewController* topRootViewController = [UIApplication sharedApplication].keyWindow.rootViewController;
      
            [topRootViewController presentViewController:paymentViewController animated:TRUE completion:nil];
              
        } else {
  
            iReturnValue = @"CardNotSupported";
      
        }         
 
    } else {
 
        iReturnValue = @"CannotMakePayments";
  
    }
 
   return iReturnValue;
 
}


-(void)paymentAuthorizationViewControllerDidFinish:(PKPaymentAuthorizationViewController *)controller {

    [(self._page1).object dismissViewControllerAnimated:YES completion:^{
  
        B4I* bi = [b4i_main new].bi;
  
        [bi raiseEvent:nil event:@"applepaypayment_closed" params:nil];
  
    }];
 
}


- (void)paymentAuthorizationViewController:(PKPaymentAuthorizationViewController *)controller didAuthorizePayment:(PKPayment *)payment completion:(void (^)(PKPaymentAuthorizationStatus))completion {
 
     B4I* bi = [b4i_main new].bi;
 
     NSString* lVerified = @"Success";
          
     NSString* verifyResult = [self _applepaypaymentinfo:payment];
 
     //NSLog(@"%@", [payment.token description]);

     if ([verifyResult isEqualToString:lVerified]) {
         [bi raiseEvent:nil event:@"applepaypayment_done:" params:@[lVerified]];
          completion(PKPaymentAuthorizationStatusSuccess);
     } else {
          [bi raiseEvent:nil event:@"applepaypayment_done:" params:@[verifyResult]];
          completion(PKPaymentAuthorizationStatusFailure);
     }
 
};

#End If

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And you can return "Failed" or "Success" in ApplePayPaymentInfo function to tell apple pay server if the user payment is valid or not you can also check the validity of payment data on your server and return "Failed" or "Success".

- I hope this tutorial is useful to you.