various updates

src/SonsOfPHP/Contract/Gateway/PaymentProcessorInterface.php

@@ -25,4 +25,9 @@ interface PaymentProcessorInterface
      * This MAY BE used as a display on the frontend
      */
     public function getName(): string;
+
+    /**
+     * Request is sent to the payment processor and a response is returned
+     */
+    public function request(RequestInterface $request): ResponseInterface;
 }

src/SonsOfPHP/Contract/Gateway/RequestInterface.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SonsOfPHP\Contract\Gateway;
+
+/**
+ * @author Joshua Estes <joshua@sonsofphp.com>
+ */
+interface RequestInterface
+{
+}

src/SonsOfPHP/Contract/Gateway/ResponseInterface.php

@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SonsOfPHP\Contract\Gateway;
+
+/**
+ * @author Joshua Estes <joshua@sonsofphp.com>
+ */
+interface ResponseInterface
+{
+}