vendor/omnipay/common/src/Omnipay/Common/AbstractGateway.php

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<?php
/**
 * Base payment gateway class
 */

namespace Omnipay\Common;

use Guzzle\Http\ClientInterface;
use Guzzle\Http\Client as HttpClient;
use Symfony\Component\HttpFoundation\ParameterBag;
use Symfony\Component\HttpFoundation\Request as HttpRequest;

/**
 * Base payment gateway class
 *
 * This abstract class should be extended by all payment gateways
 * throughout the Omnipay system.  It enforces implementation of
 * the GatewayInterface interface and defines various common attibutes
 * and methods that all gateways should have.
 *
 * Example:
 *
 * <code>
 *   // Initialise the gateway
 *   $gateway->initialize(...);
 *
 *   // Get the gateway parameters.
 *   $parameters = $gateway->getParameters();
 *
 *   // Create a credit card object
 *   $card = new CreditCard(...);
 *
 *   // Do an authorisation transaction on the gateway
 *   if ($gateway->supportsAuthorize()) {
 *       $gateway->authorize(...);
 *   } else {
 *       throw new \Exception('Gateway does not support authorize()');
 *   }
 * </code>
 *
 * For further code examples see the *omnipay-example* repository on github.
 *
 * @see GatewayInterface
 */
abstract class AbstractGateway implements GatewayInterface
{
    /**
     * @var \Symfony\Component\HttpFoundation\ParameterBag
     */
    protected $parameters;

    /**
     * @var \Guzzle\Http\ClientInterface
     */
    protected $httpClient;

    /**
     * @var \Symfony\Component\HttpFoundation\Request
     */
    protected $httpRequest;