Git repository: https://github.com/Omnilatent/OmniInAppPurchaseHelper

• Unity In App Purchasing 4.4.1.
• Unity Services Core 1.4.0.

Setup Unity IAP:

• Follow steps in: https://learn.unity.com/tutorial/unity-iap#:~:text=Adding%20the%20IAP%20Package until you complete the step "Adding the IAP Package". Do not write any script yet.
• Setup IAP Receipt Validation Obfuscator following this guide: https://docs.unity3d.com/Manual/UnityIAPValidatingReceipts.html.
• If you followed Google's guide and get a duplicate aar error, delete the billing 3.0.1 aar file

Prepare IAP Products:

• Google Play Store:
  • Build an APK to upload to Google Play alpha build.
  • Create IAP product in Google Play Console.
• Apple App Store: (Support Coming soon)

Setup in Unity project:

• Add a gameObject with component InAppPurchaseHelper in your first scene.
• Import Extra files: Go to Tools/Omnilatent/IAP Helper/Import Extra Package.
• Modify HandleIAPEvent (in Assets/Omnilatent/Extra/IAPHelperExtra/HandleIAPEvent.cs):
  • In PayoutPurchase(), handle what will happens when user successfully purchase a product. You can check payout's type and subtype.
  • In OnPurchaseComplete(), a placeholder message popup is shown when purchase is successful, modify this behaviour to your need.
• Create IAPProductData Scriptable Objects with correspond name to every products in folder "Resources/ProductData".
• Setup payout for each IAPProductData you created.
• Make sure an Assembly Definition Reference to "Omnilatent.InAppPurchaseHelper" exist in the same folder as the "Tangle" class generated by IAP Receipt Validation Obfuscator.

Buying product: InAppPurchaseHelper.Instance.BuyProduct(productId, onPurchaseComplete).

Adding remove ads:

• Make Product on Google Play Console
• Add all remove ads product to removeAdsProducts list in InAppPurchaseHelper. It'll check for remove ads on initiation.
• Use InAppPurchaseHelper.BuyProduct(string productId, PurchaseCompleteDelegate purchaseCompleteDelegate) to initiate purchasing process.
• Add HandleIAPEvent class to your project:

Get & display product's price with currency symbol: use component ProductPriceText.

Checking user's ownership of product: use InAppPurchaseHelper.CheckReceipt(productId).

InitializePurchasing:

• All IAPProductData in Resources/ProductData will be loaded and added by ConfigurationBuilder.

Example: [Updated] Extra script is now included in Extra package

• A message should be displayed in purchaseCompleteDelegate's code to announce purchase result.