decouple document number generation

app/Interfaces/Service/DocumentNumberService.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace App\Interfaces\Service;
+
+use App\Models\Common\Contact;
+
+interface DocumentNumberService
+{
+    public function getNextDocumentNumber(string $type, ?Contact $contact): string;
+
+    public function increaseNextDocumentNumber(string $type, ?Contact $contact): void;
+}