Plugin.InAppBilling 8.0.4

.NET 8.0 This package targets .NET 8.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package Plugin.InAppBilling --version 8.0.4                

                    
                

            
NuGet\Install-Package Plugin.InAppBilling -Version 8.0.4
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="Plugin.InAppBilling" Version="8.0.4" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add Plugin.InAppBilling --version 8.0.4                

                    
                

            
#r "nuget: Plugin.InAppBilling, 8.0.4"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
// Install Plugin.InAppBilling as a Cake Addin
#addin nuget:?package=Plugin.InAppBilling&version=8.0.4

// Install Plugin.InAppBilling as a Cake Tool
#tool nuget:?package=Plugin.InAppBilling&version=8.0.4

In-App Billing Plugin for .NET MAUI and Windows

A simple In-App Purchase plugin for .NET MAUI and Windows to query item information, purchase items, restore items, and more.

Subscriptions are supported on iOS, Android, and Mac. Windows/UWP/WinUI 3 - does not support subscriptions at this time.

Important Version Information

  • v8 now supports .NET 8+ .NET MAUI and Windows Apps.
  • v7 now supports .NET 6+, .NET MAUI, UWP, and Xamarin/Xamarin.Forms projects
  • v7 is built against Android Billing Library 6.0
  • See migration guides below

Documentation

Get started by reading through the In-App Billing Plugin documentation.

NuGet

Platform Support

Platform Version
iOS for .NET 10+
macCatlyst for .NET All
tvOS for .NET 10.13.2
Android for .NET 21+
Windows App SDK (WinUI 3) 10+
.NET MAUI All

Created By: @JamesMontemagno

Version 8 Major Updates

  • Nice new re-write and re-implementation of APIs!
  • Built against .NET 8
  • Now using latest Android Billing v6.2.1

Version 7 Major Updates

  • Android: You must compile and target against Android 12 or higher (or Android 13 if v7.1)
  • Android: Now using Android Billing v6
  • Android: Major changes to Android product details, subscriptions, and more
  • Android: Please read through: https://developer.android.com/google/play/billing/migrate-gpblv6
  • Android: AcknowledgePurchaseAsync is now FinalizePurchaseAsync
  • All: There are now "Extras" for all products that give you back tons of info for each platform

If you receive an error in Google Play you may need to add this to your AndroidManifest.xml inside the application node:

<meta-data
  android:name="com.google.android.play.billingclient.version"
  android:value="6.1.0" />

If you are building against .NET 8 for Android you will need to add the following packages when using v7:

<ItemGroup Condition="'$(TargetFramework)' == 'net8.0-android'">  
        <PackageReference Include="Xamarin.AndroidX.Activity" Version="1.9.0.3" />   
        <PackageReference Include="Xamarin.AndroidX.Activity.Ktx" Version="1.9.0.3" />   
        <PackageReference Include="Xamarin.AndroidX.Collection" Version="1.4.0.5" />   
        <PackageReference Include="Xamarin.AndroidX.Collection.Ktx" Version="1.4.0.4" />   
        <PackageReference Include="Xamarin.GooglePlayServices.Base" Version="118.4.0" />  
</ItemGroup>

Pending Transactions:

  • If the result of PurchaseAsync is PurchaseState.PaymentPending, store the order details locally and inform the user that they will have access to the product when the payment completes
  • When the user starts the app (and/or visits a particular page), if the stored PurchaseState is PaymentPending, call GetPurchasesAsync and query the result for a purchase that matches the stored purchase.
  • If the PurchaseState for this purchase is still PaymentPending, show the same no-access message
  • If the PurchaseState is Purchased, call ConsumePurchaseAsync or AcknowledgePurchaseAsync, depending on the product type

To respond to pending transactions you can subscribe to a listener in your Android project startup:

// Connect to the service here
await CrossInAppBilling.Current.ConnectAsync();

// Check if there are pending orders, if so then subscribe
var purchases = await CrossInAppBilling.Current.GetPurchasesAsync(ItemType.InAppPurchase);

if (purchases?.Any(p => p.State == PurchaseState.PaymentPending) ?? false)
{
  Plugin.InAppBilling.InAppBillingImplementation.OnAndroidPurchasesUpdated = (billingResult, purchases) =>
  {
       // decide what you are going to do here with purchases
       // probably acknowledge
       // probably disconnect
  };
}
else
{
  await CrossInAppBilling.Current.DisconnectAsync();
}

If you do connect the IsConnected propety will be true and when you make purchases or check purchases again you should check ahead of time and not re-connect or disconnect if there are pending purchases

I highly recommend reading the entire Google Play Billing System docs.

Consumable vs Non-consumables on Android

On Android if you purchase anything you must first Acknowledge a purchase else it will be refunded. See the android documentation.

https://developer.android.com/google/play/billing/integrate#process https://developer.android.com/google/play/billing/integrate#pending

For consumables, the consumeAsync() method fulfills the acknowledgement requirement and indicates that your app has granted entitlement to the user. This method also enables your app to make the one-time product available for purchase again.

So, if you have a consumable... ConsumePurchaseAsync will also acknowledge it, if you have a non-consumable you will need to call AcknowledgePurchaseAsync.

Version 4+ Linker Settings

For linking if you are setting Link All you may need to add:

Android:
Plugin.InAppBilling;Xamarin.Android.Google.BillingClient
Android Progaurd Rules
-keep class com.android.billingclient.api.** { *; }
-keep class com.android.vending.billing.** { *; }
iOS:
--linkskip=Plugin.InAppBilling

License

The MIT License (MIT), see LICENSE file.

Want To Support This Project?

All I have ever asked is to be active by submitting bugs, features, and sending those pull requests down! Want to go further? Make sure to subscribe to my weekly development podcast Merge Conflict, where I talk all about awesome Xamarin goodies and you can optionally support the show by becoming a supporter on Patreon.

Product Compatible and additional computed target framework versions.
.NET net8.0-android34.0 is compatible.  net8.0-ios18.0 is compatible.  net8.0-maccatalyst18.0 is compatible.  net8.0-macos15.0 is compatible.  net8.0-windows10.0.19041 is compatible. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (6)

Showing the top 5 NuGet packages that depend on Plugin.InAppBilling:

Package Downloads
Zebble.Billing

Zebble IAP plugin for Xamarin.
VerticesEngine.Android

The Android port of the Cross Platform Vertices Engine.
VerticesEngine.iOS

The iOS port of the cross platform engine Vertices Engine
ContactManager.Core

Package Description
RedCorners.IAP

In App Purchase Plugins

GitHub repositories (2)

Showing the top 2 popular GitHub repositories that depend on Plugin.InAppBilling:

Repository Stars
jamesmontemagno/app-ac-islandtracker
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A cool app to count up or down that writes text to file for streamers
Version Downloads Last updated
9.0.2-beta 263 10/18/2024
9.0.1-beta 126 10/8/2024
9.0.0-beta 74 10/3/2024
8.0.5 1,793 10/18/2024
8.0.5-beta 93 10/18/2024
8.0.4 547 10/3/2024
8.0.3-beta 361 8/9/2024
8.0.2-beta 156 7/23/2024
8.0.1-beta 92 7/23/2024
8.0.0-beta 142 7/16/2024
7.1.3 12,724 7/15/2024
7.1.2 641 7/12/2024 7.1.2 is deprecated because it has critical bugs.
7.1.2-beta 218 5/11/2024
7.1.1-beta 3,171 12/13/2023
7.1.0 56,324 10/30/2023
7.1.0-beta 807 10/4/2023
7.0.5 26,181 8/4/2023
7.0.5-beta 2,995 6/4/2023
7.0.4-beta 616 6/3/2023
7.0.3-beta 625 6/3/2023
7.0.2-beta 629 6/1/2023
7.0.1-beta 646 6/1/2023
7.0.0-beta 648 5/31/2023
6.7.1-beta 668 5/12/2023
6.7.0 51,984 10/20/2022
6.6.2-beta 829 9/25/2022
6.6.1 4,069 9/22/2022
6.6.1-beta 683 9/22/2022
6.6.0-beta 659 9/22/2022
6.5.0-beta 728 9/20/2022
6.4.0-beta 673 9/1/2022
6.3.3-beta 2,628 5/11/2022
6.3.2-beta 715 3/7/2022
6.3.1-beta 644 2/15/2022
6.3.0-beta 165 2/13/2022
6.0.0-beta 1,404 1/14/2022
5.7.1-beta 683 5/12/2023
5.6.2-beta 785 9/25/2022
5.6.1 12,486 9/22/2022
5.6.1-beta 675 9/22/2022
5.6.0-beta 683 9/22/2022
5.5.0-beta 648 9/20/2022
5.4.0-beta 638 9/1/2022
5.3.3-beta 7,157 5/11/2022
5.3.2-beta 2,580 3/7/2022
5.3.1-beta 1,830 2/15/2022
5.3.0-beta 930 2/13/2022
5.2.0-beta 1,548 1/14/2022
5.1.1-beta 984 12/26/2021
5.1.0-beta 14,116 11/21/2021
5.0.1-beta 7,603 7/18/2021
5.0.0-beta 868 7/13/2021
4.4.0-beta 1,126 7/13/2021
4.2.0-beta 2,409 5/6/2021
4.1.2-beta 13,676 2/8/2021
4.1.1-beta 840 2/8/2021
4.1.0-beta 781 2/7/2021
4.0.2 93,099 1/2/2021
4.0.2-beta 837 1/2/2021
4.0.1-beta 5,141 11/4/2020
4.0.0-beta 6,938 8/20/2020
2.1.0.187-beta 20,566 2/4/2019
2.0.0.173-beta 3,263 9/29/2018
2.0.0 184,111 5/23/2018
1.4.1.157-beta 1,402 5/9/2018
1.2.5.145-beta 1,411 5/2/2018
1.2.5.144-beta 1,336 5/2/2018
1.2.5 3,865 5/1/2018
1.2.4.140-beta 1,360 4/24/2018
1.2.4.138-beta 1,510 4/2/2018
1.2.4.137-beta 1,324 3/29/2018
1.2.4.136-beta 1,449 3/27/2018
1.2.4.133-beta 1,857 3/17/2018
1.2.4.130-beta 1,503 2/26/2018
1.2.4.123-beta 1,544 1/26/2018
1.2.4.122-beta 1,375 1/25/2018
1.2.4.116-beta 1,649 1/10/2018
1.2.4.113-beta 1,456 1/6/2018
1.2.4.112-beta 1,617 12/20/2017
1.2.4.111-beta 1,414 12/20/2017
1.2.4 28,184 1/18/2018
1.2.3.107 24,780 10/11/2017
1.2.3.98-beta 1,522 10/9/2017
1.2.2 5,268 7/13/2017
1.2.2-beta72 1,407 7/9/2017
1.2.1 10,342 7/3/2017
1.2.0.54-alpha 1,439 7/1/2017
1.2.0.51-alpha 1,443 6/28/2017
1.2.0.50-alpha 3,586 6/21/2017
1.2.0.49-alpha 1,389 6/20/2017
1.1.0.46-beta 2,752 6/15/2017
1.1.0.35-beta 3,520 4/18/2017
1.1.0.34-beta 2,835 3/23/2017
1.1.0.33-beta 1,324 3/23/2017
1.1.0.32-beta 1,381 3/22/2017
1.1.0.23-beta 1,933 2/10/2017
1.1.0.15-beta 1,435 2/6/2017
1.1.0.9-beta 1,470 1/23/2017
1.1.0.3-beta 1,321 1/21/2017
1.1.0.2-beta 1,345 1/21/2017
1.0.0.31-beta 1,341 1/16/2017
1.0.0.30-beta 1,412 1/15/2017
1.0.0.27-beta 1,325 1/14/2017

See: https://github.com/jamesmontemagno/InAppBillingPlugin