first upload all files

Modules/Currency/Http/Controllers/CurrentCurrencyController.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Modules\Currency\Http\Controllers;
+
+class CurrentCurrencyController
+{
+    /**
+     * Store a newly created resource in storage.
+     *
+     * @param string $currency
+     * @return \Illuminate\Http\Response
+     */
+    public function store($currency)
+    {
+        if (! in_array($currency, setting('supported_currencies'))) {
+            return back();
+        }
+
+        $cookie = cookie()->forever('currency', $currency);
+
+        return back()->withCookie($cookie);
+    }
+}