/**
  * Returns the attached API's wallet operations list.
  * For more information see: https://www.egopay.com/developers/api
  * Since v1.0
  * @param array $aParams
  * @return object
  */
 public function getHistory($aParams = array())
 {
     $this->_setupCredentials($aParams);
     $oHistory = $this->_oClient->history($aParams);
     $this->_checkError($oHistory);
     return $oHistory;
 }