newsupernova/vendor/magento/module-signifyd/Model/SignifydGateway/GatewayException.php

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Signifyd\Model\SignifydGateway;

/**
 * Exception of interaction with Signifyd API
 */
class GatewayException extends \Exception
{

}