Xamarin Forms InAppBillingPlugin PurchaseAsync exeption - xamarin

Question

I need some support regarding InAppBillingPlugin for Xamarin.Forms. First of all I did configuration according to documnetation: https://jamesmontemagno.github.io/InAppBillingPlugin/
application, Google Console (managed products) and iTunes Connect site.
Here is my application code.
private async Task TryInAppPurchace(string androidProductId, string iOSProductId="")
{
if (!CrossInAppBilling.IsSupported)
return;
//Android
var products = new string[] { androidProductId };
if(Device.RuntimePlatform == Device.iOS)
products = new string[] { iOSProductId };
var billing = CrossInAppBilling.Current;
//billing.InTestingMode = true;
try
{
var connected = await billing.ConnectAsync(ItemType.InAppPurchase);
if (!connected)
{
await Application.Current.MainPage.DisplayAlert("Connectivity Error", "Unable to connect to the internet.", "OK");
return;
}
var items = await billing.GetProductInfoAsync(ItemType.InAppPurchase, products);
var item = items.ToList().First();
//try to purchase item
var purchase = await billing.PurchaseAsync(item.ProductId, ItemType.InAppPurchase, item.ProductId);
//possibility that a null came through.
if (purchase == null)
{
await Application.Current.MainPage.DisplayAlert("Purchase Error", "You are unable to buy this product.", "OK");
return;
}
else
{
await _pageService.DisplayAlert("Purchased", "Consumable product.", "OK");
if (Device.RuntimePlatform == Device.iOS)
return;
var consumedItem = await CrossInAppBilling.Current.ConsumePurchaseAsync(purchase.ProductId, purchase.PurchaseToken);
if (consumedItem != null)
{
await Application.Current.MainPage.DisplayAlert("New Package added", "Successfully added new package", "OK");
}
}
}
catch (InAppBillingPurchaseException purchaseEx)
{
var message = string.Empty;
await Application.Current.MainPage.DisplayAlert("Exeption", purchaseEx.Message, "OK");
switch (purchaseEx.PurchaseError)
{
case PurchaseError.BillingUnavailable:
message = "BillingUnavailable";
break;
case PurchaseError.DeveloperError:
message = "DeveloperError";
break;
case PurchaseError.ItemUnavailable:
message = "ItemUnavailable";
break;
case PurchaseError.GeneralError:
message = "GeneralError";
break;
case PurchaseError.UserCancelled:
message = "UserCancelled.";
break;
case PurchaseError.AppStoreUnavailable:
message = "AppStoreUnavailable.";
break;
case PurchaseError.PaymentNotAllowed:
message = "PaymentNotAllowed.";
break;
case PurchaseError.PaymentInvalid:
message = "PaymentInvalid";
break;
case PurchaseError.InvalidProduct:
message = "InvalidProduct";
break;
case PurchaseError.ProductRequestFailed:
message = "ProductRequestFailed";
break;
case PurchaseError.RestoreFailed:
message = "RestoreFailed";
break;
case PurchaseError.ServiceUnavailable:
message = "ServiceUnavailable";
break;
}
}
catch (Exception ex)
{
//Something else has gone wrong, log it
await Application.Current.MainPage.DisplayAlert("Exeption", ex.Message, "OK");
}
finally
{
await billing.DisconnectAsync();
}
}
My problem is that I am not able to buy the same product again and I am getting exeption from Google Play:
{Plugin.InAppBilling.Abstractions.InAppBillingPurchaseException:
Unable to process purchase. at
Plugin.InAppBilling.InAppBillingImplementation+d__33.MoveNext
() [0x00116] in
C:\projects\inappbillingplugin\src\Plugin.InAppBilling.Android\InAppBillingImplementation.cs:324
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw ()
[0x0000c] in :0 at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess
(System.Threading.Tasks.Task task) [0x0003e] in
:0 at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification
(System.Threading.Tasks.Task task) [0x00028] in
:0 at
System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd
(System.Threading.Tasks.Task task) [0x00008] in
:0 at
System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult ()
[0x00000] in :0 at
Plugin.InAppBilling.InAppBillingImplementation+d__32.MoveNext
() [0x00090] in
C:\projects\inappbillingplugin\src\Plugin.InAppBilling.Android\InAppBillingImplementation.cs:264
--- End of stack trace from previous location where exception was thrown --- at
System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw ()
[0x0000c] in :0 at
System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess
(System.Threading.Tasks.Task task) [0x0003e] in
:0 at
System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification
(System.Threading.Tasks.Task task) [0x00028] in
:0 at
System.Runtime.CompilerServices.TaskAwaiter.ValidateEnd
(System.Threading.Tasks.Task task) [0x00008] in
:0 at
System.Runtime.CompilerServices.TaskAwaiter`1[TResult].GetResult ()
[0x00000] in :0 at
DrivingCourse_app.ViewModels.AccessPageViewModel+d__18.MoveNext
() [0x0025c] in
C:\Projects\GIT-REPO\DrivingCourse_DE\DrivingCourse_app\DrivingCourse_app\DrivingCourse_app\ViewModels\AccessPageViewModel.cs:136
}
Is something wrong with my code? This code is working for every fist purchase of the product, so configuration itself and the general process works.
Any ideas?