I'm trying to update the ean value every time a product is purchased (ie, order confirmed). However, no matter how hard I look I can't seem to find any sort of code that updates the product quantity in the database.
Where is the stock updated?
Via API in: catalog/controller/api/order.php
triggering function:
$this->model_checkout_order->addOrderHistory($json['order_id'], $order_status_id);
In: catalog/model/checkout/order.php