private function getUriPrefix()
	{
		$mode = strtolower($this->getMode());
		switch ($mode) {
			case 'live':
				$prefix = CheckoutApi_Client_Constant::APIGW3_URI_PREFIX_LIVE.CheckoutApi_Client_Constant::VERSION.'/';
				break;
            default :
                $prefix = CheckoutApi_Client_Constant::APIGW3_URI_PREFIX_SANDBOX.CheckoutApi_Client_Constant::VERSION.'/';
                break;    
		}
		return $prefix;
	}