/**
  * Function use to update status
  * @access public
  * @param string $sessionId
  * @param string $status
  * @param boolean $debug
  * @return object $result
  */
 public static function updateStatus($sessionId, $status, $debug = TRUE)
 {
     $rq = array('ReqId' => md5(rand()), 'MerchantPosId' => OpenPayU_Configuration::getMerchantPosId(), 'SessionId' => $sessionId, 'OrderStatus' => $status, 'Timestamp' => date('c'));
     $result = new OpenPayU_Result();
     $result->setRequest($rq);
     $url = OpenPayU_Configuration::getServiceUrl() . 'co/openpayu/OrderStatusUpdateRequest';
     if ($debug) {
         OpenPayU::addOutputConsole('OpenPayU endpoint for OrderStatusUpdateRequest message', $url);
     }
     $oauthResult = OpenPayu_OAuth::accessTokenByClientCredentials();
     OpenPayU::setOpenPayuEndPoint($url . '?oauth_token=' . $oauthResult->getAccessToken());
     $xml = OpenPayU::buildOrderStatusUpdateRequest($rq);
     if ($debug) {
         OpenPayU::addOutputConsole('OrderStatusUpdateRequest message', htmlentities($xml));
     }
     $merchantPosId = OpenPayU_Configuration::getMerchantPosId();
     $signatureKey = OpenPayU_Configuration::getSignatureKey();
     $response = OpenPayU::sendOpenPayuDocumentAuth($xml, $merchantPosId, $signatureKey);
     if ($debug) {
         OpenPayU::addOutputConsole('OrderStatusUpdateResponse message', htmlentities($response));
     }
     // verify response from PayU service
     $status = OpenPayU::verifyOrderStatusUpdateResponseStatus($response);
     if ($debug) {
         OpenPayU::addOutputConsole('OrderStatusUpdateResponse status', serialize($status));
     }
     $result->setStatus($status);
     $result->setError($status['StatusCode']);
     $result->setSuccess($status['StatusCode'] == 'OPENPAYU_SUCCESS' ? TRUE : FALSE);
     $result->setResponse(OpenPayU::parseOpenPayUDocument($response));
     return $result;
 }