close #398 Added: Add custom validation type : currency

app/Http/Requests/Income/Customer.php

@@ -47,7 +47,7 @@ class Customer extends Request
         return [
             'name' => 'required|string',
             'email' => $email,
-            'currency_code' => 'required|string',
+            'currency_code' => 'required|string|currency',
             'password' => $required . 'confirmed',
         ];
     }

app/Http/Requests/Income/Invoice.php

@@ -39,7 +39,7 @@ class Invoice extends Request
             'invoiced_at' => 'required|date',
             'due_at' => 'required|date',
             'amount' => 'required',
-            'currency_code' => 'required|string',
+            'currency_code' => 'required|string|currency',
             'currency_rate' => 'required',
             'customer_id' => 'required|integer',
             'customer_name' => 'required|string',

app/Http/Requests/Income/InvoicePayment.php

@@ -27,7 +27,7 @@ class InvoicePayment extends Request
             'account_id' => 'required|integer',
             'paid_at' => 'required|date',
             'amount' => 'required',
-            'currency_code' => 'required|string',
+            'currency_code' => 'required|string|currency',
             'payment_method' => 'required|string',
             'attachment' => 'mimes:jpeg,jpg,png,pdf',
         ];

app/Http/Requests/Income/Revenue.php

@@ -27,7 +27,7 @@ class Revenue extends Request
             'account_id' => 'required|integer',
             'paid_at' => 'required|date',
             'amount' => 'required',
-            'currency_code' => 'required|string',
+            'currency_code' => 'required|string|currency',
             'currency_rate' => 'required',
             'category_id' => 'required|integer',
             'payment_method' => 'required|string',