APS Refund Transaction

public class Refund {

 @Autowired
 VerifoneTransactionService verifoneTransactionService;

 public void performRefund() {

		 CurrencyUnit currency = Monetary.getCurrency(currencyCode);
		 MonetaryAmount transactionTotal = Monetary.getDefaultAmountFactory().setCurrency(currency).setNumber(amount).create();

		 PaymentRequest paymentRequest = new PaymentRequest()
		        .additionalField("id", transactionId) // The Verifone id of the Capture transaction
                // if the status is not "SETTLEMENT_REQUESTED" the Refund will be executed https://verifone.cloud/api-catalog/verifone-ecommerce-api#operation/refundPayment
                // if the status is "SETTLEMENT_REQUESTED" the Void capture will be executed https://verifone.cloud/api-catalog/verifone-ecommerce-api#operation/voidCapture
		        .additionalField("status", status)
		        .transactionTotal(transactionTotal); // required if the status is "SALE_SETTLED"

	 	PaymentResponse paymentResponse = verifoneTransactionService.refund(paymentRequest);

        paymentResponse.isSuccessful();
		paymentResponse.getGatewayResponseCode(); // Verifone reason_code
        paymentResponse.getGatewayTransactionId(); // Verifone transaction ID
        paymentResponse.getMessage(); // Verifone response message
		paymentResponse.getFailureType(); // Failure type in case the transaction was not successful.
	  	paymentResponse.getResponseMap().get("id"); // Verifone transaction ID
	  	paymentResponse.getResponseMap().get("status"); // Verifone transaction status
	  	paymentResponse.getResponseMap().get("processor_reference"); // Reference identifying the transaction, as provided by the processor.

        // When the payment is authorized successfully, this field holds the authorization code for the payment.
        // When the payment is not authorized, this field is not returned.
	  	paymentResponse.getResponseMap().get("rrn");
        paymentResponse.getResponseMap().get("arn");
	   	paymentResponse.getRawResponse(); // Verifone Raw response stored as a JSON object
	}
}