Will there be an IAP callback for redeeming a promo code to exchange for a non-consumable product in iOS?

Question

My problem is, the users cannot get the non-consumable item by redeeming the code.

I can confirm the non-consumable items can be bought correctly. I used the app receipt to check whether the user owns it. I'll find through all the products to see if there's one the product id is matching.

I cannot find any useful docs to debug the redeeming process. I don't even know if there should be a callback when the app starts. Like the transactions are not completed.

How is redeeming handled behind the scene?

If the app is open after I redeemed a code, how should the app know the user 'bought' the item? How should I know when to send them the contents?

If the users try to buy the item they redeemed, they are told they can get it for free, and I see the purchase succeed callback. But then I check app receipt, the product still not exists. I got these logs from the users.

By the way I'm using in_app_purchase plugin from Flutter. And for checking the app receipt I'm using https://github.com/robotmedia/RMStore .

Answer 1

Products redeemed with a promo code will appear on the receipt just as a purchased product would - you won't be able to differentiate from the receipt a purchase vs promo code.

There isn't a callback on the device for promos specifically, if you refresh the receipt or the user restores transactions you should see the product in the receipt.