iOS Integration Guide

To integrate the payment SDK into your application and make a payment, follow these 4 steps:

• Add the the payment SDK to your application
• Initialize the SDK
• Make a payment
• Check the transaction status

On this page you can also find:

• View our integration examples
• Customize the SDK
• Enable the card scan feature

In order to optimize the efficiency of our support, our SDK can send Sentry messages to our servers when an unusual situation or problem occurs. In this case, no sensitive data is transferred nor any data from your application.

View our integration examples

You will find many examples of integration codes of our SDK in different languages in the Github repository.

Add the the payment SDK to your application

There are different ways of integrating the SDK into an Xcode project:

1. Via CocoaPods

   To integrate the SDK into your Xcode project using CocoaPods, indicate it in your Podfile:

   target 'MyApp' do
   
    use_frameworks!
   
     pod 'LyraPaymentSDK'
   end

   Then install it with pod update.

2. Via Carthage

   To integrate the SDK into your Xcode project using Carthage, specify in your Cartfile the necessary dependencies for our SDK:

   # Payment SDK Mobile & dependencies
   github "CosmicMind/Material" == 3.1.8
   github "SnapKit/SnapKit" == 5.0.1
   github "getsentry/sentry-cocoa" "7.13.0"
   binary "https://raw.githubusercontent.com/lyra/ios-sdk/2.0.0/LyraPaymentSDK.json" == 2.0.0
   binary "https://raw.githubusercontent.com/lyra/sentry-client-cocoa/2.0.0/sentry_client_cocoa.json" == 2.0.0
   
   
   # Your dependencies
   ...

   Add the LyraPaymentSDK.xcframework to your iOS project along with the dependencies specified in your Cartfile.

We recommend to regularly update the payment SDK in order to guarantee optimal security of your payments.

You can regularly check our GitHub repository to follow new SDK releases.

Initialize the SDK

As mentioned in the chapter describing the solution operation, it is necessary to initialize the SDK when you launch your application, normally in the "didFinishLaunchingWithOptions" method of your AppDelegate.

To do this, simply call the initialize method with the following parameters and after importing the framework import LyraPaymentSDK :

Example of a call:

//Configure SDK options
var configurationOptions = [String : Any]()
configurationOptions[Lyra.apiServerName] = apiServerName

//Initialize Payment SDK
do {
    try Lyra.initialize(publicKey, configurationOptions)
} catch {

}

//Configure SDK options
NSMutableDictionary *configurationOptions = [[NSMutableDictionary alloc] init];
[configurationOptions setValue:apiServerName forKey:Lyra.apiServerName];

//Initialize Payment SDK
[Lyra initialize:publicKey :configurationOptions error:&error];

The possible keys in this dictionary are:

It should also be noted that the SDK does not allow multiple processes in parallel. During the processing of the first call, the other calls will be ignored (no callback, no exception).

Make a payment

Making a payment is a 2-step process: initializing the display of the payment form, and processing the payment itself.

Initialize the display of the payment form

When the user decides to pay, you must initialize the display of the payment form.

To do this, you need to call your merchant server, to verify the user's purchases there, and then generate a form identifier (called formToken) by calling the Web Service Charge/CreatePayment (again from your merchant server). In this request, you need to pass a formTokenVersion parameter that matches the result of the SDK's getFormTokenVersion method. The Web Service response or this form token should then be returned to your mobile application.

Here is a code sample based on the available iOS code examples and the merchant server.

  // 1. Init server comunication class for get createPayment context
  let serverCommunication = ServerCommunication()

  // 2. Execute getProcessPaymentContext for get the formToken (required param in SDK process method)
  serverCommunication.getPaymentContext { (getContextSuccess, formToken, error) in
    ...
    let objectResponse = json as? [String: Any]
    let serverResponse = objectResponse["answer"] as? [String: Any]
    let formToken = serverReponse["formToken"] as? String


  }

  // 1. Init server comunication class for get createPayment context
ServerCommunication *serverComunication = [[ServerCommunication alloc] init];

// 2. Execute getProcessPaymentContext for get the formToken (required param in SDK process method)
[_serverComunication getProcessPaymentContext:^(BOOL getContextSuccess, NSString *formToken, NSError* error) {
  ...
  NSDictionary *objectResponse = [NSJSONSerialization JSONObjectWithData:data options:0 error:&parseError];
  NSDictionary *serverResponse = [objectResponse objectForKey:@"answer"];
  NSString* formToken = (NSString*)[serverResponse objectForKey:@"formToken"];

    }];

• The step of validating the cart is crucial. Before you transmit it to us, you must check on your servers that the amount corresponds to the one in the cart,
• Calling the web service from the mobile application is amounts to making your call keys available to it (and to potential hackers), which is contrary to the security rules.

Displaying the payment screen

Once the formToken is received in the mobile app, you need to pass it to our payment SDK by calling the process method with the following parameters and after importing the framework import LyraPaymentSDK :

The SDK then checks the formToken consistency and displays the available payment methods.

Example of a call:

  Lyra.process(self, formToken,
           onSuccess: { ( _ lyraResponse: LyraResponse) -> Void

          //Verify the payment using your server: Check the response integrity by verifying the hash on your server
          self.verifyPayment(lyraResponse)
  },
          onError: { (_ error: LyraError, _ lyraResponse: LyraResponse?) -> Void

          //TODO: Handle Payment SDK error in process payment request
          self.showMessage("Payment fail: \(error.errorMessage)")
  })

  [Lyra processWithContextViewController:self formToken: formToken onSuccess:^(LyraResponse *lyraResponse

      //Verify the payment using your server: Check the response integrity by verifying the hash on your server
      [self verifyPayment:lyraResponse];

  } onError:^(LyraError *lyraError, LyraResponse *lyraResponse) {

      //TODO: Handle Payment SDK error in process payment request
      [self showMessage: [NSString stringWithFormat:@"Payment fail: %@", lyraError.errorMessage]];

  } error:&error];

Description of the LyraResponse object

The LyraResponse object is returned in both onSuccess and onError. It is an object of type JSONObject. In case of success, it is necessary to check its integrity before displaying the payment result.

In case the transaction was initiated on the server side, it will be possible to simply retrieve the payment details.

Example:

{
   "kr-hash":"80f5188e757c1828e8d4ccab87467eb50c4299e4057fa03b3f3185342f6d509c",
   "kr-hash-algorithm":"sha256_hmac",
   "kr-answer-type":"V4\/Payment",
   "kr-answer": "{
      "shopId":"65512466",
      "orderCycle":"CLOSED",
      "orderStatus":"PAID",
      "serverDate":"2019-03-01T10:54:45+00:00",
      "orderDetails":{
         "orderTotalAmount":1100,
         "orderEffectiveAmount":1100,
         "orderCurrency":"EUR",
         "mode":"TEST",
         "orderId":null,
         "_type":"V4\/OrderDetails"
      },
      "customer":{
         "billingDetails":{
            "address":null,
            "category":null,
            "cellPhoneNumber":null,
            ...
         },
         "email":null,
         "reference":null,
         "shippingDetails":{
            "address":null,
            "address2":null,
            "category":null,
            ...
         },
         "extraDetails":{
            "browserAccept":null,
            "fingerPrintId":null,
            "ipAddress":"77.136.84.251",
            "browserUserAgent":"{\"deviceName\":\"Xiaomi Mi MIX 2S\",\"os\":\"Android\",\"osVersion\":\"[9]\",\"sdkVersion\":28,\"isMobile\":true}",
            "_type":"V4\/Customer\/ExtraDetails"
         },
         "shoppingCart":{
            "insuranceAmount":null,
            "shippingAmount":null,
            "taxAmount":null,
            "cartItemInfo":null,
            "_type":"V4\/Customer\/ShoppingCart"
         },
         "_type":"V4\/Customer\/Customer"
      },
      "transactions":[
         {
            "shopId":"65512466",
            "uuid":"64d704a9bb664898954c3ef537982f99",
            "amount":1100,
            "currency":"EUR",
            "paymentMethodType":"CARD",
            "status":"PAID",
            "detailedStatus":"AUTHORISED",
            "operationType":"DEBIT",
            "creationDate":"2019-03-01T10:54:44+00:00",
            ...
         }
      ],
      "_type":"V4\/Payment"
   }"
}

The response contains the same elements as the ones sent in the IPN:

The kr-answer object contains the elements described here.

In some cases, it may be that the transaction could not be initiated on the server side. It will be possible to find the error returned by the API in the json (you can find the format here: Error codes).

Check the transaction status

Once the payment has been finalized, regardless of whether was accepted or rejected, you will be notified in two 2 ways:

• Via a call (IPN) to your merchant server, if the Merchant is registered on our payment gateway.
• By calling the onSuccess or onError callback on the mobile application side.

It is necessary to check the integrity of the message (go here for more details), and to launch business processing on the server side (when the IPN is received).

Our sample code provides an example of message integrity check via your merchant server, i.e. the verifyResult endPoint called in the verifyResult method of the application.

Here is a code sample based on the available iOS code examples and the merchant server.

    func verifyPayment(_ lyraResponse: LyraResponse) {
        serverCommunication.verifyPayment(lyraResponse, onVerifyPaymentCompletion: { (paymentVerified, isConnectionError) in

            if paymentVerified {
                self.showMessage("Payment success")
            } else {
                self.showMessage("Payment verification fail")
            }
        })
    }

    - (void) verifyPayment:(LyraResponse*) lyraResponse  {
        [_serverComunication verifyPayment:lyraResponse withCompletion:^(BOOL paymentVerified, BOOL isErrorConnection) {
            if(paymentVerified)
                [self showMessage: @"Payment success"];
            else
                [self showMessage: @"Payment verification fail"];
        }];
    }

Customize the SDK

It is possible to customize the SDK so that the views generated via the SDK (payment form) are displayed with the same colors and font as those used in your application.

You can define:

• One main color,
• A secondary color,
• the font to be used for all the texts that appear in the SDK.

The main color allows to modify:

• the header background color,
• The background color of the "Pay" button,
• the color of the word for closing the CVV tooltip pop-up,
• the color of the word for closing the brand selection pop-up,
• the color for highlighting the field and of its label when it is being edited,
• the color of the text in the payment in progress message,
• the color of the spinner in the current payment message.

The secondary color allows to change:

• the color of the arrow image for going back in the SDK header,
• the color of the texts in the SDK header,
• the text color of the "Pay" button.

To customize the payment SDK, you simply have to add a PaymentSdkTheme.plist file in your project and specify in this file the colors to use in hexadecimal values:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<dict>
	<key>PaymentSDKColor</key>
	<dict>
		<key>PaymentSDK_PrimaryColor</key>
		<string>#293C7A</string>
		<key>PaymentSDK_SecondaryColor</key>
		<string>#FFFFFF</string>
	</dict>
</dict>
</plist>

It is also possible to change the font used with the PaymentSDKFont key. Caution: For the font to be used to be taken into account, it must be added to your application, in your iOS project.

It is also possible to customize the text of the payment button. To do this, you will need to send the text to be displayed as the key value when calling the Lyra.process()

        Lyra.process(self, formToken,
                   onSuccess: { ( _ lyraResponse: LyraResponse) -> Void

                  //Verify the payment using your server: Check the response integrity by verifying the hash on your server
                  self.verifyPayment(lyraResponse)
          },
                  onError: { (_ error: LyraError, _ lyraResponse: LyraResponse?) -> Void

                  //TODO: Handle Payment SDK error in process payment request
                  self.showMessage("Payment fail: \(error.errorMessage)")
          }, [Lyra.customPayButtonLabel: "MyCustomLabel"])

Enable the card scan feature

It is possible, in the SDK, to activate the card scanning functionality. This feature allows a user not to enter his card information manually but to use the camera of his mobile device to scan it and automatically fill in the payment form.

To enable this feature, you need to:

1. Integrating the LyraCardsRecognizer library into your Xcode project

   1. Via CocoaPods

   To integrate the library into your Xcode project using CocoaPods, specify it in your Podfile:

   target 'MyApp' do
     pod 'LyraCardsRecognizer'
   end

   The install it with pod update.

   2. Via Carthage

   To integrate the LyraCardsRecognizer library into your Xcode project using Carthage, specify it in your Cartfile :

   binary "https://raw.githubusercontent.com/lyra/ios-cards-camera-recognizer/2.0.0/LyraCardsRecognizer.json" == 2.0.0

   Add the LyraCardsRecognizer.xcframework file to your iOS project.

2. When initializing the SDK, send true as a value to the cardScanningEnabled key in the configuration options dictionary (see Initializing the SDK).

    //Active card scan
    configurationOptions[Lyra.cardScanningEnabled] = true

    //Active card scan
    [configurationOptions setValue:[NSNumber numberWithBool:true] forKey:Lyra.cardScanningEnabled];

3. In the Info.plist file of your application, add the NSCameraUsageDescription key and describe the reason for using the camera.

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