Example

Simple transaction

1. Create WirecardClient instance. Note that our SDK works only with non-rooted devices, if SDK detects that device is rooted, exception is thrown during initialization of WirecardClient object. This is how you should handle this:

   WirecardClient wirecardClient;
   String environment = WirecardEnvironment.TEST.name();
   try {
       wirecardClient = WirecardClientBuilder.newInstance(context, environment)
                       .build();
   } catch (WirecardException exception) {
       //device is rooted
   }

2. Create and initialize WirecardSepaPayment object.

   WirecardSepaPayment payment = new WirecardSepaPayment(timestamp, requestID, merchantID, transactionType, amount, currency, signature, creditorID, mandateID, signedDate, merchantName, dueDate);

3. Create and initialize WirecardResponseListener object which provides callback methods which will provide transaction result or error information if occure.

   WirecardResponseListener wirecardResponseListener = new WirecardResponseListener() {
       @Override
       public void onResponse(WirecardPaymentResponse paymentResponse) {
           // handle server response
           if (paymentResponse.getTransactionState().equals(TransactionState.SUCCESS)) {
               // handle successful transaction
           } else {
               // handle unsuccessful transaction
           }
       }
       @Override
       public void onError(WirecardResponseError responseError) {
           // handle error
           switch (responseError.getErrorCode()) {
               case WirecardErrorCode.ERROR_CODE_GENERAL:
                   String detailedMessage = responseError.getErrorMessage();
                   //...
                   break;
               case WirecardErrorCode.ERROR_CODE_INVALID_PAYMENT_DATA:
                   //...
                   break;
               case WirecardErrorCode.ERROR_CODE_NETWORK_ISSUE:
                   //...
                   break;
               case WirecardErrorCode.ERROR_CODE_USER_CANCELED:
                   //...
                   break;
           }
       }
   };
   
   4. Call [WirecardClient](@ref de.wirecard.paymentsdk.WirecardClient)’s method makePayment:
   ```java
   wirecardClient.makePayment(wirecardPayPalPayment, wirecardResponseListener, paymentPageStyle);

4. Process response. When transaction was processed on server side and no error during transaction occurred, WirecardResponseListener’s method onResponse will be called. If any error occurs, method onError will be called:

Recurring transaction

If you want to perform recurring transaction, just set Periodic object into wirecardPayPalPayment object instance.

Periodic periodic = new Periodic(periodicType, sequenceType);
wirecardPayPalPayment.setPeriodic(periodic);