move into sonardesk

Commerce/Contracts/InventoryProvider.php

@@ -0,0 +1,12 @@
+<?php
+
+namespace Modules\Commerce\Contracts;
+
+use Modules\Commerce\Models\Product;
+
+interface InventoryProvider
+{
+    public function adjust(Product $product, int $quantity, string $reason, ?int $userId = null): void;
+
+    public function available(Product $product): int;
+}