Purchases UI Crash

[cihadturhan]

• I have updated Purchases SDK to the latest version
• I have read the Contribution Guidelines
• I have searched the Community
• I have read docs.revenuecat.com
• I have searched for existing Github issues

Describe the bug
Prior discussion => https://community.revenuecat.com/sdks-51/kmp-there-is-no-singleton-instance-make-sure-you-configure-purchases-before-trying-to-get-the-default-instance-6952?postid=24026#post24026

I see crashes with new purchases UI. This doesn't happen on every device, but it increased crash rate significantly

1. Environment
   1. Platform: Android
   2. SDK version: 8.4.0
   3. OS + version: 12-13-14
   4. Xcode/Android Studio version:
   5. Unity version: 6000.0.058f1
   6. How widespread is the issue. Percentage of devices affected. Don't know. Maybe 1%-5%
2. Debug logs that reproduce the issue
3. Steps to reproduce, with a description of expected vs. actual behavior
4. Other information (e.g. stacktraces, related issues, suggestions how to fix, links for us to have context, eg. stackoverflow, etc.)

       Caused by kotlin.UninitializedPropertyAccessException: There is no singleton instance. Make sure you configure Purchases before trying to get the default instance. More info here: https://errors.rev.cat/configuring-sdk
       at com.revenuecat.purchases.Purchases$Companion.getSharedInstance(Purchases.kt:1055)
       at com.revenuecat.purchases.ui.revenuecatui.helpers.HelperFunctionsKt.shouldDisplayPaywall(HelperFunctions.kt:48)
       at com.revenuecat.purchases.ui.revenuecatui.activity.PaywallActivityLauncher.launchIfNeeded(PaywallActivityLauncher.kt:171)
       at com.revenuecat.purchasesunity.ui.PaywallTrampolineActivity.launchPaywallIfNeeded(PaywallTrampolineActivity.java:63)
       at com.revenuecat.purchasesunity.ui.PaywallTrampolineActivity.onCreate(PaywallTrampolineActivity.java:50)
       at android.app.Activity.performCreate(Activity.java:8104)
       at android.app.Activity.performCreate(Activity.java:8084)
       at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1329)
       at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3680)
       at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3867)
       at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:105)
       at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:136)
       at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:96)
       at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2279)
       at android.os.Handler.dispatchMessage(Handler.java:106)
       at android.os.Looper.loopOnce(Looper.java:201)
       at android.os.Looper.loop(Looper.java:288)
       at android.app.ActivityThread.main(ActivityThread.java:7986)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:553)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1003)

Additional context

• This happens very early. It’s generally happens in the first few seconds
• I don’t show paywall on game start, so I’m just wondering if any of the android/unity code that automatically tries to show paywall on start.
• I'm suspecting this line is called automatically

  purchases-unity/RevenueCatUI/Plugins/Android/RevenueCatUI.androidlib/src/main/java/com/revenuecat/purchasesunity/ui/PaywallTrampolineActivity.java

  Line 49 in e91cf97

  if (options.getRequiredEntitlementIdentifier() != null) {

[RCGitBot]

👀 We've just linked this issue to our internal tracker and notified the team. Thank you for reporting, we're checking this out!

[vegaro]

@cihadturhan , that line does get called automatically in the onCreate of the PaywallTrampolineActivity, but that activity is only created after calling presentPaywallIfNeeded.

It looks like there might be a race condition between your Purchases.configure call and presentPaywall. How are you calling Purchases.configure? For some reason it looks like configure hasn't finished by the time you call presentPaywall

[cihadturhan]

It looks like there might be a race condition between your Purchases.configure call and presentPaywall.

I have suspected that but I couldn't find if this could be a reason.

For some reason it looks like configure hasn't finished by the time you call presentPaywall

Here is how my setup is

• Bootstrap.unity
  • Initializes RevenueCat (purchases.configure)
  • Initializes Analytics
  • Initializes Ads
• Gameplay.unity (first user with demo gameplay)
  • Takes around 30 seconds to finish
  • Then, shows a paywall
• Home.unity (subsequent runs)
  • Paywall is only shown after user taps (Pro) button

As you can see, I don't have any Paywall shown app open.

Besides, I started checking if revenuecat is configured before showing a paywall as suggested in the community discussion.

public async UniTask<bool> ShowPaywallAsync()
        {
            var configured = false;
            var counter = 0;
            while (!configured)
            {
                await UniTask.Yield();
                configured = Purchaser.I.purchases.IsConfigured();
                counter++;
            }
            
            if (counter > 3)
            {
                AnalyticsController.LogCustomEvent("paywall_show_slow_configuration", new Dictionary<string, object>
                {
                    { "frames_waited", counter }
                });
            }
            
            var result = await PaywallsPresenter.PresentIfNeeded("vip", new PaywallOptions(displayCloseButton: true));

            switch (result.Result)
            {
                case PaywallResultType.Purchased:
                    return true;
                case PaywallResultType.Restored:
                    UnityEngine.Debug.Log("[RevenueCatUI] Paywall restored purchase.");
                    return true;
                case PaywallResultType.NotPresented:
                case PaywallResultType.Cancelled:
                    return false;
                case PaywallResultType.Error:
                    ShowMessage("Error", "An error occurred while showing the paywall. Please try again later.");
                    return false;
                default:
                    ShowMessage("Error", "An unknown error occurred. Please try again later.");
                    return false;
            }
        }

FYI paywall_show_slow_configuration event is never triggered.