guys please i wasted a 1 month of my life looking about a tutorial explaining unity Economy-Service, Inventory and in-app-purchase from scratch
Hi @qomo.
First things first, have you taken our Unity Mobile course? While not comprehensive, Nathan does get you started on setting up IAP.
Since the recording of that section of the course, Unity has added their new Unity Gaming Services (UGS) which simplify much of this process.
The best way to start learning these services is from Unity’s Services Use Cases page There is a sample project to download with examples of how these services work together.