/**
  * Creates a addValue transaction through the HpsDebitService
  */
 public function execute()
 {
     parent::execute();
     $addValueSvc = new HpsDebitService($this->service->servicesConfig());
     return $addValueSvc->addValue($this->amount, $this->currency, $this->trackData, $this->pinBlock, $this->encryptionData, $this->allowDuplicates, $this->cardHolder, $this->details, $this->clientTransactionId);
 }