diff --git a/README.md b/README.md
index 2efabf8..b0bf58f 100644
--- a/README.md
+++ b/README.md
@@ -5,7 +5,7 @@
 [![Quality Gate Status](https://sonarcloud.io/api/project_badges/measure?project=RxTelegram_RxTelegram.Bot&metric=alert_status)](https://sonarcloud.io/summary/new_code?id=RxTelegram_RxTelegram.Bot)
 [![Coverage](https://sonarcloud.io/api/project_badges/measure?project=RxTelegram_RxTelegram.Bot&metric=coverage)](https://sonarcloud.io/summary/new_code?id=RxTelegram_RxTelegram.Bot)
 
-RxTelegram.Bot supports Telegram Bot API 8.0 (as at November 17, 2024).
+RxTelegram.Bot supports Telegram Bot API 8.1 (as at December 4, 2024).
 
 This is a reactive designed .NET Library for the Telegram Bot API. It works with the official [Reactive Extentions](https://github.com/dotnet/reactive).
 
diff --git a/src/RxTelegram.Bot/Interface/BaseTypes/Enums/TransactionPartnerType.cs b/src/RxTelegram.Bot/Interface/BaseTypes/Enums/TransactionPartnerType.cs
index 07cfc09..35791f0 100644
--- a/src/RxTelegram.Bot/Interface/BaseTypes/Enums/TransactionPartnerType.cs
+++ b/src/RxTelegram.Bot/Interface/BaseTypes/Enums/TransactionPartnerType.cs
@@ -15,10 +15,12 @@ public enum TransactionPartnerType
     [ImplementationType(typeof(TransactionPartnerTelegramAds))]
     TelegramAds,
 
-
     [ImplementationType(typeof(TransactionPartnerOther))]
     Other,
 
     [ImplementationType(typeof(TransactionPartnerTelegramApi))]
-    TelegramApi
+    TelegramApi,
+
+    [ImplementationType(typeof(TransactionPartnerAffiliateProgram))]
+    AffiliateProgram
 }
diff --git a/src/RxTelegram.Bot/Interface/Payments/AffiliateInfo.cs b/src/RxTelegram.Bot/Interface/Payments/AffiliateInfo.cs
new file mode 100644
index 0000000..3a186e5
--- /dev/null
+++ b/src/RxTelegram.Bot/Interface/Payments/AffiliateInfo.cs
@@ -0,0 +1,36 @@
+using RxTelegram.Bot.Interface.BaseTypes;
+
+namespace RxTelegram.Bot.Interface.Payments;
+
+/// <summary>
+/// Contains information about the affiliate that received a commission via this transaction.
+/// </summary>
+public class AffiliateInfo
+{
+    /// <summary>
+    /// Optional. The bot or the user that received an affiliate commission if it was received by a bot or a user
+    /// </summary>
+    public User AffiliateUser { get; set; }
+
+    /// <summary>
+    /// Optional. The chat that received an affiliate commission if it was received by a chat
+    /// </summary>
+    public Chat AffiliateChat { get; set; }
+
+    /// <summary>
+    /// The number of Telegram Stars received by the affiliate for each 1000 Telegram Stars received by the bot from referred users
+    /// </summary>
+    public int CommissionPerMille { get; set; }
+
+    /// <summary>
+    /// Integer amount of Telegram Stars received by the affiliate from the transaction, rounded to 0;
+    /// can be negative for refunds
+    /// </summary>
+    public int Amount { get; set; }
+
+    /// <summary>
+    /// Optional. The number of 1/1000000000 shares of Telegram Stars received by the affiliate; from -999999999 to 999999999;
+    /// can be negative for refunds
+    /// </summary>
+    public int? NanostarAmount { get; set; }
+}
diff --git a/src/RxTelegram.Bot/Interface/Payments/StarTransaction.cs b/src/RxTelegram.Bot/Interface/Payments/StarTransaction.cs
index b14ac92..88d19e4 100644
--- a/src/RxTelegram.Bot/Interface/Payments/StarTransaction.cs
+++ b/src/RxTelegram.Bot/Interface/Payments/StarTransaction.cs
@@ -16,6 +16,11 @@ public class StarTransaction
     /// </summary>
     public int Amount { get; set; }
 
+    /// <summary>
+    /// Optional. The number of 1/1000000000 shares of Telegram Stars transferred by the transaction; from 0 to 999999999
+    /// </summary>
+    public int? NanostarAmount { get; set; }
+
     /// <summary>
     /// Date the transaction was created in Unix time
     /// </summary>
diff --git a/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerAffiliateProgram.cs b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerAffiliateProgram.cs
new file mode 100644
index 0000000..7f7b68c
--- /dev/null
+++ b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerAffiliateProgram.cs
@@ -0,0 +1,25 @@
+using RxTelegram.Bot.Interface.BaseTypes;
+using RxTelegram.Bot.Interface.BaseTypes.Enums;
+
+namespace RxTelegram.Bot.Interface.Payments;
+
+/// <summary>
+/// Describes the affiliate program that issued the affiliate commission received via this transaction.
+/// </summary>
+public class TransactionPartnerAffiliateProgram : TransactionPartner
+{
+    /// <summary>
+    /// Type of the transaction partner, always “affiliate_program”
+    /// </summary>
+    public override TransactionPartnerType Type { get; set; } = TransactionPartnerType.AffiliateProgram;
+
+    /// <summary>
+    /// Optional. Information about the bot that sponsored the affiliate program
+    /// </summary>
+    public User SponsorUser { get; set; }
+
+    /// <summary>
+    /// The number of Telegram Stars received by the bot for each 1000 Telegram Stars received by the affiliate program sponsor from referred users
+    /// </summary>
+    public int CommissionPerMille { get; set; }
+}
diff --git a/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerOther.cs b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerOther.cs
index e39e7dc..d37095f 100644
--- a/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerOther.cs
+++ b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerOther.cs
@@ -10,5 +10,5 @@ public class TransactionPartnerOther : TransactionPartner
     /// <summary>
     /// Type of the transaction partner, always “other”
     /// </summary>
-    public override TransactionPartnerType Type { get; set; }
+    public override TransactionPartnerType Type { get; set; } = TransactionPartnerType.Other;
 }
diff --git a/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerTelegramAds.cs b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerTelegramAds.cs
index ce481dd..86439af 100644
--- a/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerTelegramAds.cs
+++ b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerTelegramAds.cs
@@ -10,5 +10,5 @@ public class TransactionPartnerTelegramAds : TransactionPartner
     /// <summary>
     /// Type of the transaction partner, always “telegram_ads”
     /// </summary>
-    public override TransactionPartnerType Type { get; set; }
+    public override TransactionPartnerType Type { get; set; } = TransactionPartnerType.TelegramAds;
 }
diff --git a/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerUser.cs b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerUser.cs
index 3953d53..490d2ea 100644
--- a/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerUser.cs
+++ b/src/RxTelegram.Bot/Interface/Payments/TransactionPartnerUser.cs
@@ -20,6 +20,8 @@ public class TransactionPartnerUser : TransactionPartner
     /// </summary>
     public User User { get; set; }
 
+    public AffiliateInfo Affiliate { get; set; }
+
     /// <summary>
     /// Optional. Bot-specified invoice payload
     /// </summary>
diff --git a/src/RxTelegram.Bot/RxTelegram.Bot.csproj b/src/RxTelegram.Bot/RxTelegram.Bot.csproj
index b3d2b6c..9e4b02e 100644
--- a/src/RxTelegram.Bot/RxTelegram.Bot.csproj
+++ b/src/RxTelegram.Bot/RxTelegram.Bot.csproj
@@ -10,7 +10,7 @@
         <RepositoryUrl>https://github.com/RxTelegram/RxTelegram.Bot</RepositoryUrl>
         <RepositoryType>git</RepositoryType>
         <PackageTags>Telegram;Bot;Api;Rx;Reactive;Observable;RxTelegram;RxTelegram.Bot</PackageTags>
-        <PackageVersion>8.0.0</PackageVersion>
+        <PackageVersion>8.1.0</PackageVersion>
         <PackageIcon>icon.png</PackageIcon>
         <GenerateDocumentationFile>true</GenerateDocumentationFile>
         <DocumentationFile>bin\$(Configuration)\$(TargetFramework)\$(AssemblyName).xml</DocumentationFile>