Hi Vincent,
With iOS, you don’t need to worry about “consuming” products yourself. If you buy a consumable product like a “coin pack”, it’s just handled as a “purchased” product and you can move on.
Brent
P.S. - Not sure how you’re handling your IAP setup, but I highly advise IAP Badger. It just makes IAP vastly easier in almost every way, and even includes an “inventory” system and basic obfuscation methods to deter casual hackers. I am not associated with the developer in any way, I’m simply stating my opinion based on my highly favorable and pleasant experience using IAP Badger within a personal project.