Implementing In-App Purchase Restoration in Unity
Understanding the Restoration Process
In-app purchase restoration is a crucial feature for mobile games, ensuring users can regain access to their previously purchased content if they change devices or reinstall the app. Unity supports this functionality through Unity IAP (In-App Purchasing), which seamlessly integrates with both iOS and Android platforms.
Using Unity IAP for Restoration
Unity IAP automatically manages the restoration process by checking for any existing purchases during the initialization stage of your app. This is important to ensure that users’ entitlements are updated appropriately without any manual intervention:
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1. Initializing Unity IAP
using UnityEngine.Purchasing;public class MyIAPManager : IStoreListener{ private IStoreController controller; public void InitializePurchasing() { if (IsInitialized()) return; var builder = ConfigurationBuilder.Instance(StandardPurchasingModule.Instance()); builder.AddProduct("your_product_id", ProductType.NonConsumable); UnityPurchasing.Initialize(this, builder); } private bool IsInitialized() { return controller != null; }}2. Restoring Purchases
For iOS devices, the RestoreCompletedTransactions method is automatically called by Unity IAP, which triggers restoring purchases for items such as non-consumables. On Android, the restoration process follows a similar pattern when Unity IAP initializes:
public void OnInitializeFailed(InitializationFailureReason error){ // Handle any initialization errors}public void RestorePurchases(){ if (!IsInitialized()) { Debug.LogError("Not initialized"); return; } if (Application.platform == RuntimePlatform.IPhonePlayer || Application.platform == RuntimePlatform.OSXPlayer) { controller.InitiateRestorePurchases(); } else { Debug.Log("Restore not supported on this platform"); }}Handling User Feedback
Ensure that your game provides clear feedback to the user during the restoration process. Inform the users when the restoration begins, if it succeeds, or if it encounters errors. This can improve user satisfaction and trust in your app:
public void OnRestoreTransactionFinished(bool success){ if(success){ Debug.Log("Restore Purchases succeeded"); }else{ Debug.Log("Restore Purchases failed"); }}Testing the Restoration Process
Testing is critical to ensure the restoration feature functions correctly across both iOS and Android. You can use Apple’s Sandbox environment and Google Play’s internal testing tracks to verify the purchase restoration process effectively:
- For iOS, test using a test account in the Apple Sandbox environment.
- For Android, utilize a testing track to simulate purchase restoration scenarios.
Conclusion
Implementing a well-functioning in-app purchase restoration feature is essential for providing a seamless user experience. Using Unity IAP, developers can handle this critical functionality efficiently across different platforms.