/**
  * @return \OAuthRequest
  */
 protected function _prepareOauthRequest()
 {
     $request = $this->signedOauthRequest->initialize($this->demoStatus->getQueryLink())->set_parameter('pesapal_merchant_reference', $this->ipnData->getMerchantReference())->set_parameter('pesapal_transaction_tracking_id', $this->ipnData->getTrackingId())->getSigned();
     return $request;
 }