GetPurchasesAsync(ItemType.InAppPurchase) Fails

[brianbentwood]

The call to GetPurchasesAsync fails with the following on both the simulator and my device when using TestFlight. I have not yet tried it with the published app as I want to make sure this is fixed.

Exception thrown: 'Plugin.InAppBilling.InAppBillingPurchaseException' in System.Private.CoreLib.dll
Error: Plugin.InAppBilling.InAppBillingPurchaseException: Restore Transactions Failed
   at Plugin.InAppBilling.InAppBillingImplementation.GetPurchasesAsync(ItemType itemType)
   at Waldo.PurchasePage.RestoreItemsPurchased() in /Users/boggs/Documents/Phone Apps/Waldo/Waldo/PurchasePage.xaml.cs:line 482

Version Number of Plugin: 7.1.3
Device Tested On: iPhone 12 mini
Simulator Tested On: iPhone 15
Version of VS: 17.6.1 (device) and 17.5 (simulator)
Version of Xamarin: MAUI 1.3.29
Versions of other things you are using: .Net 8.0.401

Steps to reproduce the Behavior

Simply make the following call:
purchases = await billing.GetPurchasesAsync(ItemType.InAppPurchase);

I have both consumable and non-consumable product IDs. It fails with both. But also my thought is that I only need this for non-consumable since a past purchase of a consumable does not mean anything since they could have "consumed" it already.

NOTE: the documentation shows this function taking two parameters. The second one is "idsToNotFinish". However, there is no such occurrence of this function taking two parameters in the version I am using.

Expected Behavior

I expect the "purchase" object to either be empty or to include a list of the product IDs that have been purchased so that I can iterate through them and setup my UI properly.

Actual Behavior

The call to "GetPurchasesAsync receives the following error and I never get past this call.

Exception thrown: 'Plugin.InAppBilling.InAppBillingPurchaseException' in System.Private.CoreLib.dll
Error: Plugin.InAppBilling.InAppBillingPurchaseException: Restore Transactions Failed
   at Plugin.InAppBilling.InAppBillingImplementation.GetPurchasesAsync(ItemType itemType)
   at Waldo.PurchasePage.RestoreItemsPurchased() in /Users/boggs/Documents/Phone Apps/Waldo/Waldo/PurchasePage.xaml.cs:line 482

Code snippet

	public async Task<bool> RestoreItemsPurchased()
	{
		var billing = CrossInAppBilling.Current;
		try
		{
			IEnumerable<InAppBillingPurchase> purchases;
			var connected = await billing.ConnectAsync();

			if (!connected)
			{
				return false;
			}

			purchases = await billing.GetPurchasesAsync(ItemType.InAppPurchase);
			foreach (InAppBillingPurchase p in purchases)
			{
				//Set various controls in the UI
				SetControlsAfterPurchase(dictProducts.First(z => z.Value.ProductId.Equals(p.ProductId)).Key, false);
			}

			return true;
		}    
		catch (InAppBillingPurchaseException purchaseEx)
		{
			//Billing Exception handle this based on the type
			Debug.WriteLine("Error: " + purchaseEx);
			return false;
		}
		catch (Exception ex)
		{
			//Something has gone wrong
			return false;
		}
		finally
		{    
			await billing.DisconnectAsync();
		}
	}

Screenshotst