[Solved] Play Store IAP, Questions regarding Consumables and Product Receipts

I have a few questions regarding google play store purchases.

So if I want to allow my players to get permanent item once they made a consumable purchase, say they bought 400 gold and they will also receive a 100 additional permanent attack damage.

Is it okay to check product.receipt to know if the player's account has made a consumable purchase before?

And if the player made a refund, will the product.receipt still exist on the player's google play account?

 

Alright, I've checked, no receipt unless it is non-consumable.

For anyone who is searching for an answer, I used the code that I've found here to check if any existing product is already purchased. It works.

Code (CSharp):

1.     public void OnInitialized(IStoreController controller, IExtensionProvider extensions) {
2.         Debug.Log("Initialized");
3.         this.controller = controller;
4.         this.extensions = extensions;
5.    
6.         foreach (Product p in controller.products.all) {
7.             //Non-consumables that have been purchased, should have the purchase info in the receipt.
8.             Debug.Log(p.receipt);
9.         }
10.     }
11.