Basic port of old payment methods

src/Library/Economy/Payment/CashGateway.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Library\Economy\Payment;
+
+abstract class CashGateway implements GatewayInterface
+{
+    public static function getName(): string
+    {
+        return 'cash';
+    }
+}

src/Library/Economy/Payment/CecaGateway.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Library\Economy\Payment;
+
+abstract class CecaGateway implements GatewayInterface
+{
+    public static function getName(): string
+    {
+        return 'tpv';
+    }
+}

src/Library/Economy/Payment/DropGateway.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Library\Economy\Payment;
+
+abstract class DropGateway implements GatewayInterface
+{
+    public static function getName(): string
+    {
+        return 'drop';
+    }
+}

src/Library/Economy/Payment/PaypalGateway.php

@@ -0,0 +1,11 @@
+<?php
+
+namespace App\Library\Economy\Payment;
+
+abstract class PaypalGateway implements GatewayInterface
+{
+    public static function getName(): string
+    {
+        return 'paypal';
+    }
+}