Unity Project ID: Every project using Unity IAP will need a Project ID from Unity Services
Product: the person or business that pays to advertise a product or service.
Product Receipt
Product Key
Product Meta Data
Consumable Product
Nonconsumable Product
Subscription Product
Project Key
Store - AppStore
Store - GooglePlay
Unity IAP Package
Unity IAP Service
Unity Analytics Service
IStoreListener
IStore
Restore Purchases
Sandbox
TestFlight
AppStore IAP Terms: Restore Terms
GooglePlay IAP Terms:
Purchase Flow: understand the unity purchase flow
Receipts
App Receipt
Transaction Receipt
Receipt Validation: Receipt validation helps you prevent users from accessing content they have not purchased.
Test IAPs GooglePlay: Store Environment Test
Test IAPs AppStore: Store Environment Test
Unity Docs - Processing Purchasing
Unity Docs - Receipt Validation
Unity Docs - CodelessIAP
Unity Docs - IAP Sample Project
Setting up Unity IAP other optional guide
Import Unity IAP Package
Enable Analytics and IAP Service
Setup IAP Service In Project Settings (Add App Key,)
Import the Store Packages from Project Settings/Services/IAP
Configuring Stores
Setup Products on Stores
Code
Initialize Products for each Store