first upload all files

Modules/Payment/GatewayInterface.php

@@ -0,0 +1,13 @@
+<?php
+
+namespace Modules\Payment;
+
+use Illuminate\Http\Request;
+use Modules\Order\Entities\Order;
+
+interface GatewayInterface
+{
+    public function purchase(Order $order, Request $request);
+
+    public function complete(Order $order);
+}