wip test rewrite

* Fixed 2 typos

* Update BTCPayServer/Controllers/ManageController.APIKeys.cs

Co-authored-by: Zaxounette <51208677+Zaxounette@users.noreply.github.com>

* Update BTCPayServer/Controllers/ManageController.APIKeys.cs

Co-authored-by: Zaxounette <51208677+Zaxounette@users.noreply.github.com>

Co-authored-by: Zaxounette <51208677+Zaxounette@users.noreply.github.com>

.github/ISSUE_TEMPLATE/bug-report.md

@@ -1,38 +1,63 @@
 ---
-name: Bug report
-about: File a bug report
-title: ''
-labels: ''
-assignees: ''
+name: "\U0001F41B Bug report"
+about: Report a bug or a technical issue
 
 ---
 
+<!--
+Thank you for reporting a technical issue.
+
+This issue tracker is only for bug reports and problems. 
+
+For general questions please read our documentation docs.btcpayserver.org. You can ask technical questions in discussions https://github.com/btcpayserver/btcpayserver/discussions and general support on our community chat chat.btcpayserver.org
+
+Please fill in as much of the template below as you're able. 
+-->
+
 **Describe the bug**
 A clear and concise description of what the bug is.
 
-**To Reproduce**
-Steps to reproduce the behavior:
+**To Reproduce the bug**
+Steps to reproduce the reported bug:
 1. Go to '...'
 2. Click on '....'
 3. Scroll down to '....'
 4. See error
 
 **Expected behavior**
+
+<!--
 A clear and concise description of what you expected to happen.
+-->
 
 **Screenshots**
+
+
+<!--
 If applicable, add screenshots to help explain your problem.
+-->
 
 **Your BTCPay Environment (please complete the following information):**
-- BTCPay Server Version [available in the right bottom corner of footer] 
-- Deployment Method: [e.g. Docker, Manual, Third-Party-hoist]
- - Browser [e.g. chrome, safari]
+- BTCPay Server Version:    <!--[available in the right bottom corner of footer] -->
+- Deployment Method:        <!--[e.g. Docker, Manual, Third-Party-host]-->
+- Browser:                  <!--[e.g. Chrome, Safari]-->
 
 **Logs (if applicable)**
-Basic logs can be found in Server Settings > Logs. More logs https://docs.btcpayserver.org/Troubleshooting/#2-looking-through-the-logs
+
+
+<!--
+Basic logs can be found in Server Settings > Logs. 
+More logs https://docs.btcpayserver.org/Troubleshooting/#2-looking-through-the-logs
+-->
 
 **Setup Parameters**
-If you're reporting a deployment issue run `. btcpay-setup.sh -i` and paste your the parameters by obscuring private information.
+
+<!--
+If you're reporting a deployment issue run `. btcpay-setup.sh -i` and paste the setup parameters here with your private information removed or obscured.
+-->
 
 **Additional context**
+
+<!--
 Add any other context about the problem here.
+-->

.github/ISSUE_TEMPLATE/config.yml

@@ -1,5 +1,11 @@
 blank_issues_enabled: false
-contact_links:
-  - name: Community Support Chat 
+contact_links: 
+  - name: 🚀 Discussions  
+    url: https://github.com/btcpayserver/btcpayserver/discussions
+    about: Technical discussions, questions and feature requests    
+  - name: 📝 Official Documentation
+    url: https://docs.btcpayserver.org
+    about: Check our documentation for answers to common questions 
+  - name: 💬 Community Support Chat  
     url: https://chat.btcpayserver.org/
-    about: Ask general questions and get community support in real-time.
+    about: Ask general questions and get community support in real-time

.github/ISSUE_TEMPLATE/feature_request.md

@@ -1,23 +0,0 @@
----
-name: Feature request
-about: Suggest a new feature or enhancement
-title: ''
-labels: ''
-assignees: ''
-
----
-
-**Is your feature request related to a problem? Please describe.**
-A clear and concise description of what the problem is. Ex. I'm always frustrated when [...]
-
-**Describe the solution you'd like**
-A clear and concise description of what you want to happen.
-
-**Sketch/Image/Wireframe/Mockup**
- If applicable provide examples, wireframes, sketches or images to better explain your idea.
-
-**Describe alternatives you've considered**
-A clear and concise description of any alternative solutions or features you've considered.
-
-**Additional context**
-Add any other context or screenshots about the feature request here.

.gitignore

@@ -298,3 +298,4 @@ BTCPayServer/wwwroot/bundles/*
 !.vscode/extensions.json
 BTCPayServer/testpwd
 .DS_Store
+Packed Plugins

.run/Pack Test Extension.run.xml

@@ -0,0 +1,21 @@
+<component name="ProjectRunConfigurationManager">
+  <configuration default="false" name="Pack Test Plugin" type="DotNetProject" factoryName=".NET Project" singleton="false">
+    <option name="EXE_PATH" value="$PROJECT_DIR$/BTCPayServer.PluginPacker/bin/Debug/netcoreapp3.1/BTCPayServer.PluginPacker.dll" />
+    <option name="PROGRAM_PARAMETERS" value="../../../../BTCPayServer.Plugins.Test\bin\Debug\netcoreapp3.1 BTCPayServer.Plugins.Test &quot;../../../../Packed Plugins&quot;" />
+    <option name="WORKING_DIRECTORY" value="$PROJECT_DIR$/BTCPayServer.PluginPacker/bin/Debug/netcoreapp3.1" />
+    <option name="PASS_PARENT_ENVS" value="1" />
+    <option name="USE_EXTERNAL_CONSOLE" value="0" />
+    <option name="USE_MONO" value="0" />
+    <option name="RUNTIME_ARGUMENTS" value="" />
+    <option name="PROJECT_PATH" value="$PROJECT_DIR$/BTCPayServer.PluginPacker/BTCPayServer.PluginPacker.csproj" />
+    <option name="PROJECT_EXE_PATH_TRACKING" value="1" />
+    <option name="PROJECT_ARGUMENTS_TRACKING" value="1" />
+    <option name="PROJECT_WORKING_DIRECTORY_TRACKING" value="1" />
+    <option name="PROJECT_KIND" value="DotNetCore" />
+    <option name="PROJECT_TFM" value=".NETCoreApp,Version=v3.1" />
+    <method v="2">
+      <option name="Build" default="false" projectName="BTCPayServer.Plugins.Test" projectPath="C:\Git\btcpayserver\BTCPayServer.Plugins.Test\BTCPayServer.Plugins.Test.csproj" />
+      <option name="Build" />
+    </method>
+  </configuration>
+</component>

BTCPayServer.Abstractions/BTCPayServer.Abstractions.csproj

@@ -0,0 +1,39 @@
+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="../Build/Version.csproj" Condition="Exists('../Build/Version.csproj')" />
+  <Import Project="../Build/Common.csproj" />
+
+  <PropertyGroup>
+    <Company>BTCPay Server</Company>
+    <Copyright>Copyright © BTCPay Server 2020</Copyright>
+    <Description>A library for BTCPay Server plugin development</Description>
+    <PackageIcon>icon.png</PackageIcon>
+    <PackageTags>btcpay,btcpayserver</PackageTags>
+    <PackageProjectUrl>https://github.com/btcpayserver/btcpayserver/tree/master/BTCPayServer.Abstractions</PackageProjectUrl>
+    <PackageLicenseExpression>MIT</PackageLicenseExpression>
+    <RepositoryUrl>https://github.com/btcpayserver/btcpayserver</RepositoryUrl>
+    <RepositoryType>git</RepositoryType>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <DebugType>portable</DebugType>
+    <Optimize>true</Optimize>
+    <NoWarn>1591;1573;1572;1584;1570;3021</NoWarn>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+  </PropertyGroup>  
+  <ItemGroup Condition=" '$(Configuration)' == 'Release' ">
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
+  </ItemGroup>
+  <ItemGroup>
+    <FrameworkReference Include="Microsoft.AspNetCore.App" />
+  </ItemGroup>
+  <ItemGroup>
+    <None Include="icon.png" Pack="true" PackagePath="\" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="3.1.4" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="3.1.4" />
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="3.1.4" />
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="3.1.1" />
+  </ItemGroup>
+</Project>

BTCPayServer.Abstractions/Configuration/DataDirectories.cs

@@ -0,0 +1,12 @@
+namespace BTCPayServer.Configuration
+{
+    public class DataDirectories
+    {
+        public string DataDir  { get; set; }
+        public string PluginDir  { get; set; }
+        public string TempStorageDir { get; set; }
+        public string StorageDir { get; set; }
+    }
+    
+    
+}

BTCPayServer.Abstractions/Constants/AuthenticationSchemes.cs

@@ -1,4 +1,4 @@
-namespace BTCPayServer.Security
+namespace BTCPayServer.Abstractions.Constants
 {
     public class AuthenticationSchemes
     {

BTCPayServer.Abstractions/Contracts/BaseDbContextFactory.cs

@@ -0,0 +1,109 @@
+using System;
+using BTCPayServer.Abstractions.Models;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Metadata;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.Extensions.Options;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Migrations;
+using Npgsql.EntityFrameworkCore.PostgreSQL.Migrations.Operations;
+
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public abstract class BaseDbContextFactory<T> where T: DbContext
+    {
+        private readonly IOptions<DatabaseOptions> _options;
+        private readonly string _schemaPrefix;
+
+        public BaseDbContextFactory(IOptions<DatabaseOptions> options, string schemaPrefix)
+        {
+            _options = options;
+            _schemaPrefix = schemaPrefix;
+        }
+
+        public abstract T CreateContext();
+
+        class CustomNpgsqlMigrationsSqlGenerator : NpgsqlMigrationsSqlGenerator
+        {
+            public CustomNpgsqlMigrationsSqlGenerator(MigrationsSqlGeneratorDependencies dependencies, IMigrationsAnnotationProvider annotations, Npgsql.EntityFrameworkCore.PostgreSQL.Infrastructure.Internal.INpgsqlOptions opts) : base(dependencies, annotations, opts)
+            {
+            }
+
+            protected override void Generate(NpgsqlCreateDatabaseOperation operation, IModel model, MigrationCommandListBuilder builder)
+            {
+                builder
+                    .Append("CREATE DATABASE ")
+                    .Append(Dependencies.SqlGenerationHelper.DelimitIdentifier(operation.Name));
+
+                // POSTGRES gotcha: Indexed Text column (even if PK) are not used if we are not using C locale
+                builder
+                    .Append(" TEMPLATE ")
+                    .Append(Dependencies.SqlGenerationHelper.DelimitIdentifier("template0"));
+
+                builder
+                    .Append(" LC_CTYPE ")
+                    .Append(Dependencies.SqlGenerationHelper.DelimitIdentifier("C"));
+
+                builder
+                    .Append(" LC_COLLATE ")
+                    .Append(Dependencies.SqlGenerationHelper.DelimitIdentifier("C"));
+
+                builder
+                    .Append(" ENCODING ")
+                    .Append(Dependencies.SqlGenerationHelper.DelimitIdentifier("UTF8"));
+
+                if (operation.Tablespace != null)
+                {
+                    builder
+                        .Append(" TABLESPACE ")
+                        .Append(Dependencies.SqlGenerationHelper.DelimitIdentifier(operation.Tablespace));
+                }
+
+                builder.AppendLine(Dependencies.SqlGenerationHelper.StatementTerminator);
+
+                EndStatement(builder, suppressTransaction: true);
+            }
+        }
+
+        public void ConfigureBuilder(DbContextOptionsBuilder builder)
+        {
+            switch (_options.Value.DatabaseType)
+            {
+                case DatabaseType.Sqlite:
+                    builder.UseSqlite(_options.Value.ConnectionString, o =>
+                    {
+                        if (!string.IsNullOrEmpty(_schemaPrefix))
+                        {
+                            o.MigrationsHistoryTable(_schemaPrefix);
+                        }
+                    });
+                    break;
+                case DatabaseType.Postgres:
+                    builder
+                        .UseNpgsql(_options.Value.ConnectionString, o =>
+                        {
+                            o.EnableRetryOnFailure(10);
+                            if (!string.IsNullOrEmpty(_schemaPrefix))
+                            {
+                                o.MigrationsHistoryTable(_schemaPrefix);
+                            }
+                        })
+                        .ReplaceService<IMigrationsSqlGenerator, CustomNpgsqlMigrationsSqlGenerator>();
+                    break;
+                case DatabaseType.MySQL:
+                    builder.UseMySql(_options.Value.ConnectionString, o =>
+                    {
+                        o.EnableRetryOnFailure(10);
+                            
+                        if (!string.IsNullOrEmpty(_schemaPrefix))
+                        {
+                            o.MigrationsHistoryTable(_schemaPrefix);
+                        }
+                    });
+                    break;
+                default:
+                    throw new ArgumentOutOfRangeException();
+            }
+        }
+        
+    }
+}

BTCPayServer.Abstractions/Contracts/IBTCPayServerPlugin.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Text.Json.Serialization;
+using BTCPayServer.Abstractions.Converters;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public interface IBTCPayServerPlugin
+    {
+        public string Identifier { get; }
+        string Name { get; }
+        [JsonConverter(typeof(VersionConverter))]
+        Version Version { get; }
+        string Description { get; }
+        bool SystemPlugin { get; set; }
+        PluginDependency[] Dependencies { get; }
+        void Execute(IApplicationBuilder applicationBuilder, IServiceProvider applicationBuilderApplicationServices);
+        void Execute(IServiceCollection applicationBuilder);
+
+        public class PluginDependency
+        {
+            public string Identifier { get; set; }
+            public string Condition { get; set; }
+            public override string ToString()
+            {
+                return $"{Identifier}: {Condition}";
+            }
+        }
+    }
+    
+}

BTCPayServer.Abstractions/Contracts/INotificationHandler.cs

@@ -0,0 +1,27 @@
+using System;
+
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public abstract class BaseNotification
+    {
+        public abstract string Identifier { get; }
+        public abstract string NotificationType { get; }
+    }
+    
+    public interface INotificationHandler
+    {
+        string NotificationType { get; }
+        Type NotificationBlobType { get; }
+        public (string identifier, string name)[] Meta { get; }
+        void FillViewModel(object notification, NotificationViewModel vm);
+    }
+    
+    public class NotificationViewModel
+    {
+        public string Id { get; set; }
+        public DateTimeOffset Created { get; set; }
+        public string Body { get; set; }
+        public string ActionLink { get; set; }
+        public bool Seen { get; set; }
+    }
+}

BTCPayServer.Abstractions/Contracts/IPluginHookAction.cs

@@ -0,0 +1,10 @@
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public interface IPluginHookAction
+    {
+        public string Hook { get; }
+        Task Execute(object args);
+    }
+}

BTCPayServer.Abstractions/Contracts/IPluginHookFilter.cs

@@ -0,0 +1,11 @@
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public interface IPluginHookFilter
+    {
+        public string Hook { get; }
+        
+        Task<object> Execute(object args);
+    }
+}

BTCPayServer.Abstractions/Contracts/IPluginHookService.cs

@@ -0,0 +1,10 @@
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public interface IPluginHookService
+    {
+        Task ApplyAction(string hook, object args);
+        Task<object> ApplyFilter(string hook, object args);
+    }
+}

BTCPayServer.Abstractions/Contracts/ISettingsRepository.cs

@@ -0,0 +1,13 @@
+#nullable enable
+using System.Threading;
+using System.Threading.Tasks;
+
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public interface ISettingsRepository
+    {
+        Task<T?> GetSettingAsync<T>(string? name = null) where T : class;
+        Task UpdateSetting<T>(T obj, string? name = null) where T : class;
+        Task<T> WaitSettingsChanged<T>(CancellationToken cancellationToken = default) where T : class;
+    }
+}

BTCPayServer.Abstractions/Contracts/IStartupTask.cs

@@ -1,7 +1,7 @@
 using System.Threading;
 using System.Threading.Tasks;
 
-namespace BTCPayServer.Hosting
+namespace BTCPayServer.Abstractions.Contracts
 {
     public interface IStartupTask
     {

BTCPayServer.Abstractions/Contracts/ISyncSummaryProvider.cs

@@ -1,4 +1,4 @@
-namespace BTCPayServer.Contracts
+namespace BTCPayServer.Abstractions.Contracts
 {
     public interface ISyncSummaryProvider
     {
@@ -6,5 +6,4 @@ namespace BTCPayServer.Contracts
 
         string Partial { get; }
     }
-    
 }

BTCPayServer.Abstractions/Contracts/IUIExtension.cs

@@ -0,0 +1,9 @@
+namespace BTCPayServer.Abstractions.Contracts
+{
+    public interface IUIExtension
+    {
+        string Partial { get; }
+        
+        string Location { get; }
+    }
+}

BTCPayServer.Abstractions/Converters/VersionConverter.cs

@@ -0,0 +1,19 @@
+using System;
+using System.Text.Json;
+using System.Text.Json.Serialization;
+
+namespace BTCPayServer.Abstractions.Converters
+{
+    public class VersionConverter : JsonConverter<Version>
+    {
+        public override Version Read(ref Utf8JsonReader reader, Type typeToConvert, JsonSerializerOptions options)
+        {
+            return Version.Parse(reader.GetString());
+        }
+
+        public override void Write(Utf8JsonWriter writer, Version value, JsonSerializerOptions options)
+        {
+            writer.WriteStringValue(value.ToString());
+        }
+    }
+}

BTCPayServer.Abstractions/Extensions/Extensions.cs

@@ -0,0 +1,20 @@
+using System.Text.Json;
+using BTCPayServer.Abstractions.Models;
+using Microsoft.AspNetCore.Mvc.ViewFeatures;
+
+namespace BTCPayServer.Abstractions.Extensions
+{
+    public static class SetStatusMessageModelExtensions
+    {
+        public static void SetStatusMessageModel(this ITempDataDictionary tempData, StatusMessageModel statusMessage)
+        {
+            if (statusMessage == null)
+            {
+                tempData.Remove("StatusMessageModel");
+                return;
+            }
+
+            tempData["StatusMessageModel"] = JsonSerializer.Serialize(statusMessage, new JsonSerializerOptions());
+        }
+    }
+}

BTCPayServer.Abstractions/Extensions/ServiceCollectionExtensions.cs

@@ -1,6 +1,7 @@
-using BTCPayServer.Hosting;
+using BTCPayServer.Abstractions.Contracts;
+using Microsoft.Extensions.DependencyInjection;
 
-namespace Microsoft.Extensions.DependencyInjection
+namespace BTCPayServer.Abstractions.Extensions
 {
     public static class ServiceCollectionExtensions
     {

BTCPayServer.Abstractions/Models/BaseBTCPayServerPlugin.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Reflection;
+using BTCPayServer.Abstractions.Contracts;
+using Microsoft.AspNetCore.Builder;
+using Microsoft.Extensions.DependencyInjection;
+
+namespace BTCPayServer.Abstractions.Models
+{
+    public abstract class BaseBTCPayServerPlugin : IBTCPayServerPlugin
+    {
+        public abstract string Identifier { get; }
+        public abstract string Name { get; }
+
+        public virtual Version Version
+        {
+            get
+            {
+                return Assembly.GetAssembly(GetType())?.GetName().Version ?? new Version(1, 0, 0, 0);
+            }
+        }
+
+        public abstract string Description { get; }
+        public bool SystemPlugin { get; set; }
+        public virtual IBTCPayServerPlugin.PluginDependency[] Dependencies { get; } = Array.Empty<IBTCPayServerPlugin.PluginDependency>();
+
+        public virtual void Execute(IApplicationBuilder applicationBuilder,
+            IServiceProvider applicationBuilderApplicationServices)
+        {
+        }
+
+        public virtual void Execute(IServiceCollection applicationBuilder)
+        {
+        }
+    }
+}

BTCPayServer.Abstractions/Models/DatabaseOptions.cs

@@ -0,0 +1,8 @@
+namespace BTCPayServer.Abstractions.Models
+{
+    public class DatabaseOptions
+    {
+        public DatabaseType DatabaseType { get; set; }
+        public string ConnectionString { get; set; }
+    }
+}

BTCPayServer.Abstractions/Models/DatabaseType.cs

@@ -0,0 +1,9 @@
+namespace BTCPayServer.Abstractions.Models
+{
+    public enum DatabaseType
+    {
+        Sqlite,
+        Postgres,
+        MySQL,
+    }
+}

BTCPayServer.Abstractions/Models/StatusMessageModel.cs

@@ -1,6 +1,6 @@
 using System;
 
-namespace BTCPayServer.Models
+namespace BTCPayServer.Abstractions.Models
 {
     public class StatusMessageModel
     {

BTCPayServer.Abstractions/PushNuget.ps1

@@ -0,0 +1,7 @@
+rm "bin\release\" -Recurse -Force
+dotnet pack --configuration Release --include-symbols -p:SymbolPackageFormat=snupkg
+$package=(ls .\bin\Release\*.nupkg).FullName
+dotnet nuget push $package --source "https://api.nuget.org/v3/index.json"
+$ver = ((ls .\bin\release\*.nupkg)[0].Name -replace '.*(\d+\.\d+\.\d+)\.nupkg','$1')
+git tag -a "BTCPayServer.Abstractions/v$ver" -m "BTCPayServer.Abstractions/$ver"
+git push origin "BTCPayServer.Abstractions/v$ver"

BTCPayServer.Abstractions/Services/PluginAction.cs

@@ -0,0 +1,16 @@
+using System.Threading.Tasks;
+using BTCPayServer.Abstractions.Contracts;
+
+namespace BTCPayServer.Abstractions.Services
+{
+    public abstract class PluginAction<T>:IPluginHookAction
+    {
+        public abstract string Hook { get; }
+        public Task Execute(object args)
+        {
+            return Execute(args is T args1 ? args1 : default);
+        }
+
+        public abstract Task Execute(T arg);
+    }
+}

BTCPayServer.Abstractions/Services/PluginHookFilter.cs

@@ -0,0 +1,17 @@
+using System.Threading.Tasks;
+using BTCPayServer.Abstractions.Contracts;
+
+namespace BTCPayServer.Abstractions.Services
+{
+    public abstract class PluginHookFilter<T>:IPluginHookFilter
+    {
+        public abstract string Hook { get; }
+
+        public Task<object> Execute(object args)
+        {
+            return Execute(args is T args1 ? args1 : default).ContinueWith(task => task.Result as object);
+        }
+
+        public abstract Task<T> Execute(T arg);
+    }
+}

BTCPayServer.Abstractions/Services/UIExtension.cs

@@ -0,0 +1,16 @@
+using BTCPayServer.Abstractions.Contracts;
+
+namespace BTCPayServer.Abstractions.Services
+{
+    public class UIExtension: IUIExtension
+    {
+        public UIExtension(string partial, string location)
+        {
+            Partial = partial;
+            Location = location;
+        }
+
+        public string Partial { get; }
+        public string Location { get; }
+    }
+}

BTCPayServer.Client/BTCPayServer.Client.csproj

@@ -2,12 +2,36 @@
 
     <PropertyGroup>
         <TargetFramework>netstandard2.1</TargetFramework>
+        <Company>BTCPay Server</Company>
+        <Copyright>Copyright © BTCPay Server 2020</Copyright>
+        <Description>A client library for BTCPay Server Greenfield API</Description>
+        <PackageIcon>icon.png</PackageIcon>
+        <PackageTags>btcpay,btcpayserver</PackageTags>
+        <PackageProjectUrl>https://github.com/btcpayserver/btcpayserver/tree/master/BTCPayServer.Client</PackageProjectUrl>
+        <PackageLicenseExpression>MIT</PackageLicenseExpression>
+        <RepositoryUrl>https://github.com/btcpayserver/btcpayserver</RepositoryUrl>
+        <RepositoryType>git</RepositoryType>
     </PropertyGroup>
-
+  <PropertyGroup>
+    <Version Condition=" '$(Version)' == '' ">1.4.0</Version>
+  </PropertyGroup>
+  <PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
+    <PublishRepositoryUrl>true</PublishRepositoryUrl>
+    <EmbedUntrackedSources>true</EmbedUntrackedSources>
+    <DebugType>portable</DebugType>
+    <Optimize>true</Optimize>
+    <NoWarn>1591;1573;1572;1584;1570;3021</NoWarn>
+    <GenerateDocumentationFile>true</GenerateDocumentationFile>
+  </PropertyGroup>
+  <ItemGroup Condition=" '$(Configuration)' == 'Release' ">
+    <PackageReference Include="Microsoft.SourceLink.GitHub" Version="1.0.0" PrivateAssets="All" />
+  </ItemGroup>
     <ItemGroup>
-      <PackageReference Include="NBitcoin" Version="5.0.51" />
+      <PackageReference Include="NBitcoin" Version="5.0.77" />
       <PackageReference Include="BTCPayServer.Lightning.Common" Version="1.2.0" />
       <PackageReference Include="Newtonsoft.Json" Version="12.0.3" />
     </ItemGroup>
-
+  <ItemGroup>
+    <None Include="icon.png" Pack="true" PackagePath="\" />
+  </ItemGroup>
 </Project>

BTCPayServer.Client/BTCPayServerClient.Authorization.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Threading.Tasks;
 
 namespace BTCPayServer.Client
 {
@@ -7,7 +8,7 @@ namespace BTCPayServer.Client
     {
 
         public static Uri GenerateAuthorizeUri(Uri btcpayHost, string[] permissions, bool strict = true,
-            bool selectiveStores = false)
+            bool selectiveStores = false, (string ApplicationIdentifier, Uri Redirect) applicationDetails = default)
         {
             var result = new UriBuilder(btcpayHost);
             result.Path = "api-keys/authorize";
@@ -18,6 +19,15 @@ namespace BTCPayServer.Client
                     {"strict", strict}, {"selectiveStores", selectiveStores}, {"permissions", permissions}
                 });
 
+            if (applicationDetails.Redirect != null)
+            {
+                AppendPayloadToQuery(result, new KeyValuePair<string, object>("redirect", applicationDetails.Redirect));
+                if (!string.IsNullOrEmpty(applicationDetails.ApplicationIdentifier))
+                {
+                    AppendPayloadToQuery(result, new KeyValuePair<string, object>("applicationIdentifier", applicationDetails.ApplicationIdentifier));
+                }
+            }
+
             return result.Uri;
         }
     }

BTCPayServer.Client/BTCPayServerClient.Invoices.cs

@@ -0,0 +1,117 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Client.Models;
+using NBitcoin;
+
+namespace BTCPayServer.Client
+{
+    public partial class BTCPayServerClient
+    {
+        public virtual async Task<IEnumerable<InvoiceData>> GetInvoices(string storeId, string orderId = null, InvoiceStatus[] status = null,
+            DateTimeOffset? startDate = null,
+            DateTimeOffset? endDate = null,
+            bool includeArchived = false,
+            CancellationToken token = default)
+        {
+            Dictionary<string, object> queryPayload = new Dictionary<string, object>();
+            queryPayload.Add(nameof(includeArchived), includeArchived);
+
+            if (startDate is DateTimeOffset s)
+                queryPayload.Add(nameof(startDate), Utils.DateTimeToUnixTime(s));
+
+            if (endDate is DateTimeOffset e)
+                queryPayload.Add(nameof(endDate), Utils.DateTimeToUnixTime(e));
+
+            if (orderId != null)
+                queryPayload.Add(nameof(orderId), orderId);
+
+            if (status != null)
+                queryPayload.Add(nameof(status), status.Select(s=> s.ToString().ToLower()).ToArray());
+            
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/invoices",
+                        queryPayload), token);
+            return await HandleResponse<IEnumerable<InvoiceData>>(response);
+        }
+
+        public virtual async Task<InvoiceData> GetInvoice(string storeId, string invoiceId,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices/{invoiceId}"), token);
+            return await HandleResponse<InvoiceData>(response);
+        }
+        public virtual async Task<InvoicePaymentMethodDataModel[]> GetInvoicePaymentMethods(string storeId, string invoiceId,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices/{invoiceId}/payment-methods"), token);
+            return await HandleResponse<InvoicePaymentMethodDataModel[]>(response);
+        }
+
+        public virtual async Task ArchiveInvoice(string storeId, string invoiceId,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices/{invoiceId}",
+                    method: HttpMethod.Delete), token);
+            await HandleResponse(response);
+        }
+
+        public virtual async Task<InvoiceData> CreateInvoice(string storeId,
+            CreateInvoiceRequest request, CancellationToken token = default)
+        {
+            if (request == null)
+                throw new ArgumentNullException(nameof(request));
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices", bodyPayload: request,
+                    method: HttpMethod.Post), token);
+            return await HandleResponse<InvoiceData>(response);
+        }
+
+        public virtual async Task<InvoiceData> UpdateInvoice(string storeId, string invoiceId,
+            UpdateInvoiceRequest request, CancellationToken token = default)
+        {
+            if (request == null)
+                throw new ArgumentNullException(nameof(request));
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices/{invoiceId}", bodyPayload: request,
+                    method: HttpMethod.Put), token);
+            return await HandleResponse<InvoiceData>(response);
+        }
+
+        public virtual async Task<InvoiceData> MarkInvoiceStatus(string storeId, string invoiceId,
+            MarkInvoiceStatusRequest request, CancellationToken token = default)
+        {
+            if (request == null)
+                throw new ArgumentNullException(nameof(request));
+            if (request.Status!= InvoiceStatus.Settled && request.Status!= InvoiceStatus.Invalid)
+                throw new ArgumentOutOfRangeException(nameof(request.Status), "Status can only be Invalid or Complete");
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices/{invoiceId}/status", bodyPayload: request,
+                    method: HttpMethod.Post), token);
+            return await HandleResponse<InvoiceData>(response);
+        }
+
+        public virtual async Task<InvoiceData> UnarchiveInvoice(string storeId, string invoiceId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices/{invoiceId}/unarchive", 
+                    method: HttpMethod.Post), token);
+            return await HandleResponse<InvoiceData>(response);
+        }
+
+        public virtual async Task ActivateInvoicePaymentMethod(string storeId, string invoiceId, string paymentMethod, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/invoices/{invoiceId}/payment-methods/{paymentMethod}/activate", 
+                    method: HttpMethod.Post), token);
+            await HandleResponse(response);
+        }
+    }
+}

BTCPayServer.Client/BTCPayServerClient.LightningNetworkPaymentMethods.cs

@@ -0,0 +1,63 @@
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Client.Models;
+
+namespace BTCPayServer.Client
+{
+    public partial class BTCPayServerClient
+    {
+        public virtual async Task<IEnumerable<LightningNetworkPaymentMethodData>>
+            GetStoreLightningNetworkPaymentMethods(string storeId,
+                CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/LightningNetwork"), token);
+            return await HandleResponse<IEnumerable<LightningNetworkPaymentMethodData>>(response);
+        }
+
+        public virtual async Task<LightningNetworkPaymentMethodData> GetStoreLightningNetworkPaymentMethod(
+            string storeId,
+            string cryptoCode, CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/LightningNetwork/{cryptoCode}"), token);
+            return await HandleResponse<LightningNetworkPaymentMethodData>(response);
+        }
+
+        public virtual async Task RemoveStoreLightningNetworkPaymentMethod(string storeId,
+            string cryptoCode, CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/LightningNetwork/{cryptoCode}",
+                        method: HttpMethod.Delete), token);
+            await HandleResponse(response);
+        }
+
+        public virtual async Task<LightningNetworkPaymentMethodData> UpdateStoreLightningNetworkPaymentMethod(
+            string storeId,
+            string cryptoCode, LightningNetworkPaymentMethodData paymentMethod,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/LightningNetwork/{cryptoCode}",
+                    bodyPayload: paymentMethod, method: HttpMethod.Put), token);
+            return await HandleResponse<LightningNetworkPaymentMethodData>(response);
+        }
+
+        public virtual async Task<LightningNetworkPaymentMethodData>
+            UpdateStoreLightningNetworkPaymentMethodToInternalNode(string storeId,
+                string cryptoCode, LightningNetworkPaymentMethodData paymentMethod,
+                CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/LightningNetwork/{cryptoCode}/internal",
+                    method: HttpMethod.Put), token);
+            return await HandleResponse<LightningNetworkPaymentMethodData>(response);
+        }
+    }
+}

BTCPayServer.Client/BTCPayServerClient.Notifications.cs

@@ -0,0 +1,47 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Client.Models;
+
+namespace BTCPayServer.Client
+{
+    public partial class BTCPayServerClient
+    {
+        public virtual async Task<IEnumerable<NotificationData>> GetNotifications(bool? seen = null,
+            CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/users/me/notifications",
+                        seen != null ? new Dictionary<string, object>() {{nameof(seen), seen}} : null), token);
+            return await HandleResponse<IEnumerable<NotificationData>>(response);
+        }
+
+        public virtual async Task<NotificationData> GetNotification(string notificationId,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/users/me/notifications/{notificationId}"), token);
+            return await HandleResponse<NotificationData>(response);
+        }
+
+        public virtual async Task<NotificationData> UpdateNotification(string notificationId, bool? seen,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/users/me/notifications/{notificationId}",
+                    method: HttpMethod.Put, bodyPayload: new UpdateNotification() {Seen = seen}), token);
+            return await HandleResponse<NotificationData>(response);
+        }
+
+        public virtual async Task RemoveNotification(string notificationId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/users/me/notifications/{notificationId}",
+                    method: HttpMethod.Delete), token);
+            await HandleResponse(response);
+        }
+    }
+}

BTCPayServer.Client/BTCPayServerClient.OnChainPaymentMethods.cs

@@ -0,0 +1,74 @@
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Client.Models;
+
+namespace BTCPayServer.Client
+{
+    public partial class BTCPayServerClient
+    {
+        public virtual async Task<IEnumerable<OnChainPaymentMethodData>> GetStoreOnChainPaymentMethods(string storeId,
+            CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain"), token);
+            return await HandleResponse<IEnumerable<OnChainPaymentMethodData>>(response);
+        }
+
+        public virtual async Task<OnChainPaymentMethodData> GetStoreOnChainPaymentMethod(string storeId,
+            string cryptoCode, CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}"), token);
+            return await HandleResponse<OnChainPaymentMethodData>(response);
+        }
+
+        public virtual async Task RemoveStoreOnChainPaymentMethod(string storeId,
+            string cryptoCode, CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}",
+                        method: HttpMethod.Delete), token);
+            await HandleResponse(response);
+        }
+
+        public virtual async Task<OnChainPaymentMethodData> UpdateStoreOnChainPaymentMethod(string storeId,
+            string cryptoCode, OnChainPaymentMethodData paymentMethod,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}",
+                    bodyPayload: paymentMethod, method: HttpMethod.Put), token);
+            return await HandleResponse<OnChainPaymentMethodData>(response);
+        }
+
+        public virtual async Task<OnChainPaymentMethodPreviewResultData>
+            PreviewProposedStoreOnChainPaymentMethodAddresses(
+                string storeId, string cryptoCode, OnChainPaymentMethodData paymentMethod, int offset = 0,
+                int amount = 10,
+                CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/preview",
+                    bodyPayload: paymentMethod,
+                    queryPayload: new Dictionary<string, object>() {{"offset", offset}, {"amount", amount}},
+                    method: HttpMethod.Post), token);
+            return await HandleResponse<OnChainPaymentMethodPreviewResultData>(response);
+        }
+
+        public virtual async Task<OnChainPaymentMethodPreviewResultData> PreviewStoreOnChainPaymentMethodAddresses(
+            string storeId, string cryptoCode, int offset = 0, int amount = 10,
+            CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(
+                CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/preview",
+                    queryPayload: new Dictionary<string, object>() {{"offset", offset}, {"amount", amount}},
+                    method: HttpMethod.Get), token);
+            return await HandleResponse<OnChainPaymentMethodPreviewResultData>(response);
+        }
+    }
+}

BTCPayServer.Client/BTCPayServerClient.OnChainWallet.cs

@@ -0,0 +1,122 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Net.Http;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Client.Models;
+using NBitcoin;
+
+namespace BTCPayServer.Client
+{
+    public partial class BTCPayServerClient
+    {
+        public virtual async Task<OnChainWalletOverviewData> ShowOnChainWalletOverview(string storeId, string cryptoCode,
+            CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet"), token);
+            return await HandleResponse<OnChainWalletOverviewData>(response);
+        }
+        public virtual async Task<OnChainWalletFeeRateData> GetOnChainFeeRate(string storeId, string cryptoCode, int? blockTarget = null,
+            CancellationToken token = default)
+        {
+            Dictionary<string, object> queryParams = new Dictionary<string, object>();
+            if (blockTarget != null)
+            {
+                queryParams.Add("blockTarget",blockTarget);
+            }
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/feeRate", queryParams), token);
+            return await HandleResponse<OnChainWalletFeeRateData>(response);
+        }
+        
+        public virtual async Task<OnChainWalletAddressData> GetOnChainWalletReceiveAddress(string storeId, string cryptoCode, bool forceGenerate = false,
+            CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/address", new Dictionary<string, object>()
+                    {
+                        {"forceGenerate", forceGenerate}
+                    }), token);
+            return await HandleResponse<OnChainWalletAddressData>(response);
+        }
+        
+        public virtual async Task UnReserveOnChainWalletReceiveAddress(string storeId, string cryptoCode,
+            CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/address",method:HttpMethod.Delete), token);
+            await HandleResponse(response);
+        }
+       
+        public virtual async Task<IEnumerable<OnChainWalletTransactionData>> ShowOnChainWalletTransactions(
+            string storeId, string cryptoCode, TransactionStatus[] statusFilter = null,
+            CancellationToken token = default)
+        {
+            var query = new Dictionary<string, object>();
+            if (statusFilter?.Any() is true)
+            {
+                query.Add(nameof(statusFilter), statusFilter);
+            }
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/transactions", query), token);
+            return await HandleResponse<IEnumerable<OnChainWalletTransactionData>>(response);
+        }
+        
+        public virtual async Task<OnChainWalletTransactionData> GetOnChainWalletTransaction(
+            string storeId, string cryptoCode, string transactionId,
+            CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/transactions/{transactionId}"), token);
+            return await HandleResponse<OnChainWalletTransactionData>(response);
+        }
+        
+        public virtual async Task<IEnumerable<OnChainWalletUTXOData>> GetOnChainWalletUTXOs(string storeId,
+            string cryptoCode,
+            CancellationToken token = default)
+        {
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/utxos"), token);
+            return await HandleResponse<IEnumerable<OnChainWalletUTXOData>>(response);
+        }
+        
+        public virtual async Task<OnChainWalletTransactionData> CreateOnChainTransaction(string storeId,
+            string cryptoCode, CreateOnChainTransactionRequest request,
+            CancellationToken token = default)
+        {
+            if (!request.ProceedWithBroadcast)
+            {
+                throw new ArgumentOutOfRangeException(nameof(request.ProceedWithBroadcast),
+                    "Please use CreateOnChainTransactionButDoNotBroadcast when wanting to only create the transaction");
+            }
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/transactions", null, request, HttpMethod.Post), token);
+            return await HandleResponse<OnChainWalletTransactionData>(response);
+        }
+        
+        public virtual async Task<Transaction> CreateOnChainTransactionButDoNotBroadcast(string storeId,
+            string cryptoCode, CreateOnChainTransactionRequest request, Network network,
+            CancellationToken token = default)
+        {
+            if (request.ProceedWithBroadcast)
+            {
+                throw new ArgumentOutOfRangeException(nameof(request.ProceedWithBroadcast),
+                    "Please use CreateOnChainTransaction when wanting to also broadcast the transaction");
+            }
+            var response =
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-methods/Onchain/{cryptoCode}/wallet/transactions", null, request, HttpMethod.Post), token);
+            return Transaction.Parse(await HandleResponse<string>(response), network);
+        }
+    }
+}

BTCPayServer.Client/BTCPayServerClient.PaymentRequests.cs

@@ -10,10 +10,13 @@ namespace BTCPayServer.Client
     public partial class BTCPayServerClient
     {
         public virtual async Task<IEnumerable<PaymentRequestData>> GetPaymentRequests(string storeId,
+            bool includeArchived = false,
             CancellationToken token = default)
         {
             var response =
-                await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/payment-requests"), token);
+                await _httpClient.SendAsync(
+                    CreateHttpRequest($"api/v1/stores/{storeId}/payment-requests",
+                        new Dictionary<string, object>() {{nameof(includeArchived), includeArchived}}), token);
             return await HandleResponse<IEnumerable<PaymentRequestData>>(response);
         }
 

BTCPayServer.Client/BTCPayServerClient.Webhooks.cs

@@ -0,0 +1,65 @@
+using System;
+using System.Collections.Generic;
+using System.Net.Http;
+using System.Runtime.CompilerServices;
+using System.Threading;
+using System.Threading.Tasks;
+using BTCPayServer.Client.Models;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Client
+{
+    public partial class BTCPayServerClient
+    {
+        public async Task<StoreWebhookData> CreateWebhook(string storeId, Client.Models.CreateStoreWebhookRequest create, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks", bodyPayload: create, method: HttpMethod.Post), token);
+            return await HandleResponse<StoreWebhookData>(response);
+        }
+        public async Task<StoreWebhookData> GetWebhook(string storeId, string webhookId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks/{webhookId}"), token);
+            if (response.StatusCode == System.Net.HttpStatusCode.NotFound)
+                return null;
+            return await HandleResponse<StoreWebhookData>(response);
+        }
+        public async Task<StoreWebhookData> UpdateWebhook(string storeId, string webhookId, Models.UpdateStoreWebhookRequest update, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks/{webhookId}", bodyPayload: update, method: HttpMethod.Put), token);
+            return await HandleResponse<StoreWebhookData>(response);
+        }
+        public async Task<bool> DeleteWebhook(string storeId, string webhookId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks/{webhookId}", method: HttpMethod.Delete), token);
+            return response.IsSuccessStatusCode;
+        }
+        public async Task<StoreWebhookData[]> GetWebhooks(string storeId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks"), token);
+            return await HandleResponse<StoreWebhookData[]>(response);
+        }
+        public async Task<WebhookDeliveryData[]> GetWebhookDeliveries(string storeId, string webhookId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks/{webhookId}/deliveries"), token);
+            return await HandleResponse<WebhookDeliveryData[]>(response);
+        }
+        public async Task<WebhookDeliveryData> GetWebhookDelivery(string storeId, string webhookId, string deliveryId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks/{webhookId}/deliveries/{deliveryId}"), token);
+            return await HandleResponse<WebhookDeliveryData>(response);
+        }
+        public async Task<string> RedeliverWebhook(string storeId, string webhookId, string deliveryId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks/{webhookId}/deliveries/{deliveryId}/redeliver", null, HttpMethod.Post), token);
+            return await HandleResponse<string>(response);
+        }
+
+        public async Task<WebhookEvent> GetWebhookDeliveryRequest(string storeId, string webhookId, string deliveryId, CancellationToken token = default)
+        {
+            var response = await _httpClient.SendAsync(CreateHttpRequest($"api/v1/stores/{storeId}/webhooks/{webhookId}/deliveries/{deliveryId}/request"), token);
+            if (response.StatusCode == System.Net.HttpStatusCode.NotFound)
+                return null;
+            return await HandleResponse<WebhookEvent>(response);
+        }
+    }
+}

BTCPayServer.Client/BTCPayServerClient.cs

@@ -5,6 +5,7 @@ using System.Linq;
 using System.Net.Http;
 using System.Net.Http.Headers;
 using System.Text;
+using System.Threading;
 using System.Threading.Tasks;
 using Newtonsoft.Json;
 
@@ -65,9 +66,17 @@ namespace BTCPayServer.Client
         protected async Task<T> HandleResponse<T>(HttpResponseMessage message)
         {
             await HandleResponse(message);
-            return JsonConvert.DeserializeObject<T>(await message.Content.ReadAsStringAsync());
+            var str = await message.Content.ReadAsStringAsync();
+            return JsonConvert.DeserializeObject<T>(str);
         }
 
+        public async Task<T> SendHttpRequest<T>(string path,
+            Dictionary<string, object> queryPayload = null,
+            HttpMethod method = null, CancellationToken cancellationToken = default)
+        {
+            using var resp = await _httpClient.SendAsync(CreateHttpRequest(path, queryPayload, method), cancellationToken);
+            return await HandleResponse<T>(resp);
+        }
         protected virtual HttpRequestMessage CreateHttpRequest(string path,
             Dictionary<string, object> queryPayload = null,
             HttpMethod method = null)
@@ -103,29 +112,37 @@ namespace BTCPayServer.Client
             return request;
         }
 
-        private static void AppendPayloadToQuery(UriBuilder uri, Dictionary<string, object> payload)
+        public static void AppendPayloadToQuery(UriBuilder uri, KeyValuePair<string, object> keyValuePair)
+        {
+            if (uri.Query.Length > 1)
+                uri.Query += "&";
+
+            UriBuilder uriBuilder = uri;
+            if (!(keyValuePair.Value is string) &&
+                keyValuePair.Value.GetType().GetInterfaces().Contains((typeof(IEnumerable))))
+            {
+                foreach (var item in (IEnumerable)keyValuePair.Value)
+                {
+                    uriBuilder.Query = uriBuilder.Query + Uri.EscapeDataString(keyValuePair.Key) + "=" +
+                                       Uri.EscapeDataString(item.ToString()) + "&";
+                }
+            }
+            else
+            {
+                uriBuilder.Query = uriBuilder.Query + Uri.EscapeDataString(keyValuePair.Key) + "=" +
+                                   Uri.EscapeDataString(keyValuePair.Value.ToString()) + "&";
+            }
+            uri.Query = uri.Query.Trim('&');
+        }
+
+        public static void AppendPayloadToQuery(UriBuilder uri, Dictionary<string, object> payload)
         {
             if (uri.Query.Length > 1)
                 uri.Query += "&";
             foreach (KeyValuePair<string, object> keyValuePair in payload)
             {
-                UriBuilder uriBuilder = uri;
-                if (!(keyValuePair.Value is string) && keyValuePair.Value.GetType().GetInterfaces().Contains((typeof(IEnumerable))))
-                {
-                    foreach (var item in (IEnumerable)keyValuePair.Value)
-                    {
-                        uriBuilder.Query = uriBuilder.Query + Uri.EscapeDataString(keyValuePair.Key) + "=" +
-                                           Uri.EscapeDataString(item.ToString()) + "&";
-                    }
-                }
-                else
-                {
-                    uriBuilder.Query = uriBuilder.Query + Uri.EscapeDataString(keyValuePair.Key) + "=" +
-                                       Uri.EscapeDataString(keyValuePair.Value.ToString()) + "&";
-                }
+                AppendPayloadToQuery(uri, keyValuePair);
             }
-
-            uri.Query = uri.Query.Trim('&');
         }
     }
 }

BTCPayServer.Client/JsonConverters/TimeSpanJsonConverter.cs

@@ -4,13 +4,38 @@ using Newtonsoft.Json;
 
 namespace BTCPayServer.Client.JsonConverters
 {
-    public class TimeSpanJsonConverter : JsonConverter
+    public abstract class TimeSpanJsonConverter : JsonConverter
     {
+        public class Seconds : TimeSpanJsonConverter
+        {
+            protected override long ToLong(TimeSpan value)
+            {
+                return (long)value.TotalSeconds;
+            }
+
+            protected override TimeSpan ToTimespan(long value)
+            {
+                return TimeSpan.FromSeconds(value);
+            }
+        }
+        public class Minutes : TimeSpanJsonConverter
+        {
+            protected override long ToLong(TimeSpan value)
+            {
+                return (long)value.TotalMinutes;
+            }
+            protected override TimeSpan ToTimespan(long value)
+            {
+                return TimeSpan.FromMinutes(value);
+            }
+        }
         public override bool CanConvert(Type objectType)
         {
             return objectType == typeof(TimeSpan) || objectType == typeof(TimeSpan?);
         }
 
+        protected abstract TimeSpan ToTimespan(long value);
+        protected abstract long ToLong(TimeSpan value);
         public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)
         {
             try
@@ -24,11 +49,11 @@ namespace BTCPayServer.Client.JsonConverters
                 }
                 if (reader.TokenType != JsonToken.Integer)
                     throw new JsonObjectException("Invalid timespan, expected integer", reader);
-                return TimeSpan.FromSeconds((long)reader.Value);
+                return ToTimespan((long)reader.Value);
             }
             catch
             {
-                throw new JsonObjectException("Invalid locktime", reader);
+                throw new JsonObjectException("Invalid timespan", reader);
             }
         }
 
@@ -36,7 +61,7 @@ namespace BTCPayServer.Client.JsonConverters
         {
             if (value is TimeSpan s)
             {
-                writer.WriteValue((long)s.TotalSeconds);
+                writer.WriteValue(ToLong(s));
             }
         }
     }

BTCPayServer.Client/Models/AddCustomerEmailRequest.cs

@@ -0,0 +1,7 @@
+namespace BTCPayServer.Client.Models
+{
+    public class AddCustomerEmailRequest
+    {
+        public string Email { get; set; }
+    }
+}

BTCPayServer.Client/Models/ApplicationUserData.cs

@@ -1,3 +1,6 @@
+using System;
+using Newtonsoft.Json;
+
 namespace BTCPayServer.Client.Models
 {
     public class ApplicationUserData
@@ -21,5 +24,16 @@ namespace BTCPayServer.Client.Models
         /// whether the user needed to verify their email on account creation
         /// </summary>
         public bool RequiresEmailConfirmation { get; set; }
+
+        /// <summary>
+        /// the roles of the user
+        /// </summary>
+        public string[] Roles { get; set; }
+
+        /// <summary>
+        /// the date the user was created. Null if created before v1.0.5.6.
+        /// </summary>
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset? Created { get; set; }
     }
 }

BTCPayServer.Client/Models/CreateInvoiceRequest.cs

@@ -0,0 +1,41 @@
+using System;
+using BTCPayServer.Client.JsonConverters;
+using BTCPayServer.JsonConverters;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Client.Models
+{
+    public class CreateInvoiceRequest
+    {
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal Amount { get; set; }
+        public string Currency { get; set; }
+        public JObject Metadata { get; set; }
+        public CheckoutOptions Checkout { get; set; } = new CheckoutOptions();
+
+        public class CheckoutOptions
+        {
+
+            [JsonConverter(typeof(StringEnumConverter))]
+            public SpeedPolicy? SpeedPolicy { get; set; }
+
+            public string[] PaymentMethods { get; set; }
+
+            [JsonConverter(typeof(TimeSpanJsonConverter.Minutes))]
+            [JsonProperty("expirationMinutes")]
+            public TimeSpan? Expiration { get; set; }
+            [JsonConverter(typeof(TimeSpanJsonConverter.Minutes))]
+            [JsonProperty("monitoringMinutes")]
+            public TimeSpan? Monitoring { get; set; }
+
+            public double? PaymentTolerance { get; set; }
+            [JsonProperty("redirectURL")]
+            public string RedirectURL { get; set; }
+
+            public bool? RedirectAutomatically { get; set; }
+            public string DefaultLanguage { get; set; }
+        }
+    }
+}

BTCPayServer.Client/Models/CreateLightningInvoiceRequest.cs

@@ -17,10 +17,10 @@ namespace BTCPayServer.Client.Models
             Description = description;
             Expiry = expiry;
         }
-        [JsonConverter(typeof(LightMoneyJsonConverter))]
+        [JsonConverter(typeof(BTCPayServer.Client.JsonConverters.LightMoneyJsonConverter))]
         public LightMoney Amount { get; set; }
         public string Description { get; set; }
-        [JsonConverter(typeof(JsonConverters.TimeSpanJsonConverter))]
+        [JsonConverter(typeof(JsonConverters.TimeSpanJsonConverter.Seconds))]
         public TimeSpan Expiry { get; set; }
         public bool PrivateRouteHints { get; set; }
 

BTCPayServer.Client/Models/CreateOnChainTransactionRequest.cs

@@ -0,0 +1,30 @@
+using System.Collections.Generic;
+using BTCPayServer.JsonConverters;
+using NBitcoin;
+using NBitcoin.JsonConverters;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class CreateOnChainTransactionRequest
+    {
+
+        public class CreateOnChainTransactionRequestDestination
+        {
+            public string Destination { get; set; }
+            [JsonConverter(typeof(NumericStringJsonConverter))]
+            public decimal? Amount { get; set; }
+            public bool SubtractFromAmount { get; set; }
+        }
+        [JsonConverter(typeof(FeeRateJsonConverter))]
+        public FeeRate FeeRate { get; set; }
+        public bool ProceedWithPayjoin { get; set; }= true;
+        public bool ProceedWithBroadcast { get; set; } = true;
+        public bool NoChange { get; set; } = false;
+        [JsonProperty(ItemConverterType = typeof(OutpointJsonConverter))]
+        public List<OutPoint> SelectedInputs { get; set; } = null;
+        public List<CreateOnChainTransactionRequestDestination> Destinations { get; set; }
+        [JsonProperty("rbf")]
+        public bool? RBF { get; set; } = null;
+    }
+}

BTCPayServer.Client/Models/CreatePullPaymentRequest.cs

@@ -11,7 +11,7 @@ namespace BTCPayServer.Client.Models
         [JsonProperty(ItemConverterType = typeof(NumericStringJsonConverter))]
         public decimal Amount { get; set; }
         public string Currency { get; set; }
-        [JsonConverter(typeof(TimeSpanJsonConverter))]
+        [JsonConverter(typeof(TimeSpanJsonConverter.Seconds))]
         public TimeSpan? Period { get; set; }
         [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
         public DateTimeOffset? ExpiresAt { get; set; }

BTCPayServer.Client/Models/GreenfieldAPIError.cs

@@ -10,8 +10,7 @@ namespace BTCPayServer.Client.Models
         }
         public GreenfieldAPIError(string code, string message)
         {
-            if (code == null)
-                throw new ArgumentNullException(nameof(code));
+            code = code ?? "generic-error";
             if (message == null)
                 throw new ArgumentNullException(nameof(message));
             Code = code;

BTCPayServer.Client/Models/InvoiceData.cs

@@ -0,0 +1,30 @@
+using System;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace BTCPayServer.Client.Models
+{
+    public class InvoiceData : CreateInvoiceRequest
+    {
+        public string Id { get; set; }
+        public string CheckoutLink { get; set; }
+        [JsonConverter(typeof(StringEnumConverter))]
+        public InvoiceStatus Status { get; set; }
+        [JsonConverter(typeof(StringEnumConverter))]
+        public InvoiceExceptionStatus AdditionalStatus { get; set; }
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset MonitoringExpiration { get; set; }
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset ExpirationTime { get; set; }
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset CreatedTime { get; set; }
+    }
+    public enum InvoiceStatus
+    {
+        New,
+        Processing,
+        Expired,
+        Invalid,
+        Settled
+    }
+}

BTCPayServer.Client/Models/InvoiceExceptionStatus.cs

@@ -0,0 +1,12 @@
+namespace BTCPayServer.Client.Models
+{
+    public enum InvoiceExceptionStatus
+    {
+        None,
+        PaidLate,
+        PaidPartial,
+        Marked,
+        Invalid,
+        PaidOver
+    }
+}

BTCPayServer.Client/Models/InvoicePaymentMethodDataModel.cs

@@ -0,0 +1,62 @@
+using System;
+using System.Collections.Generic;
+using BTCPayServer.JsonConverters;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace BTCPayServer.Client.Models
+{
+    public class InvoicePaymentMethodDataModel
+    {
+        public bool Activated { get; set; }
+        public string Destination { get; set; }
+        public string PaymentLink { get; set; }
+
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal Rate { get; set; }
+
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal PaymentMethodPaid { get; set; }
+
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal TotalPaid { get; set; }
+
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal Due { get; set; }
+
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal Amount { get; set; }
+
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal NetworkFee { get; set; }
+
+        public List<Payment> Payments { get; set; }
+        public string PaymentMethod { get; set; }
+
+        public class Payment
+        {
+            public string Id { get; set; }
+
+            [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+            public DateTime ReceivedDate { get; set; }
+
+            [JsonConverter(typeof(NumericStringJsonConverter))]
+            public decimal Value { get; set; }
+
+            [JsonConverter(typeof(NumericStringJsonConverter))]
+            public decimal Fee { get; set; }
+
+            [JsonConverter(typeof(StringEnumConverter))]
+            public PaymentStatus Status { get; set; }
+
+            public string Destination { get; set; }
+            
+            public enum PaymentStatus
+            {
+                Invalid,
+                Processing,
+                Settled
+            }
+        }
+    }
+}

BTCPayServer.Client/Models/LabelData.cs

@@ -0,0 +1,14 @@
+using System.Collections.Generic;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Client.Models
+{
+    public class LabelData
+    {
+        public string Type { get; set; }
+        public string Text { get; set; }
+
+        [JsonExtensionData] public Dictionary<string, JToken> AdditionalData { get; set; }
+    }
+}

BTCPayServer.Client/Models/LightningNetworkPaymentMethodData.cs

@@ -0,0 +1,28 @@
+namespace BTCPayServer.Client.Models
+{
+    public class LightningNetworkPaymentMethodData
+    {
+        /// <summary>
+        /// Whether the payment method is enabled
+        /// </summary>
+        public bool Enabled { get; set; }
+
+        /// <summary>
+        /// Crypto code of the payment method
+        /// </summary>
+        public string CryptoCode { get; set; }
+
+        public string ConnectionString { get; set; }
+
+        public LightningNetworkPaymentMethodData()
+        {
+        }
+
+        public LightningNetworkPaymentMethodData(string cryptoCode, string connectionString, bool enabled)
+        {
+            Enabled = enabled;
+            CryptoCode = cryptoCode;
+            ConnectionString = connectionString;
+        }
+    }
+}

BTCPayServer.Client/Models/MarkInvoiceStatusRequest.cs

@@ -0,0 +1,11 @@
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace BTCPayServer.Client.Models
+{
+    public class MarkInvoiceStatusRequest
+    {
+        [JsonConverter(typeof(StringEnumConverter))]
+        public InvoiceStatus Status { get; set; }
+    }
+}

BTCPayServer.Client/Models/NotificationData.cs

@@ -0,0 +1,16 @@
+using System;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class NotificationData
+    {
+        public string Id { get; set; }
+        public string Body { get; set; }
+        public bool Seen { get; set; }
+        public Uri Link { get; set; }
+
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset CreatedTime { get; set; }
+    }
+}

BTCPayServer.Client/Models/OnChainPaymentMethodData.cs

@@ -0,0 +1,39 @@
+using NBitcoin;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class OnChainPaymentMethodData
+    {
+        /// <summary>
+        /// Whether the payment method is enabled
+        /// </summary>
+        public bool Enabled { get; set; }
+
+        /// <summary>
+        /// Crypto code of the payment method
+        /// </summary>
+        public string CryptoCode { get; set; }
+
+        /// <summary>
+        /// The derivation scheme
+        /// </summary>
+        public string DerivationScheme { get; set; }
+
+        public string Label { get; set; }
+
+        [JsonConverter(typeof(NBitcoin.JsonConverters.KeyPathJsonConverter))]
+        public RootedKeyPath AccountKeyPath { get; set; }
+
+        public OnChainPaymentMethodData()
+        {
+        }
+
+        public OnChainPaymentMethodData(string cryptoCode, string derivationScheme, bool enabled)
+        {
+            Enabled = enabled;
+            CryptoCode = cryptoCode;
+            DerivationScheme = derivationScheme;
+        }
+    }
+}

BTCPayServer.Client/Models/OnChainPaymentMethodPreviewResultData.cs

@@ -0,0 +1,23 @@
+using System.Collections.Generic;
+
+namespace BTCPayServer.Client.Models
+{
+    public class OnChainPaymentMethodPreviewResultData
+    {
+        /// <summary>
+        /// a list of addresses generated by the derivation scheme
+        /// </summary>
+        public IList<OnChainPaymentMethodPreviewResultAddressItem> Addresses { get; set; } =
+            new List<OnChainPaymentMethodPreviewResultAddressItem>();
+
+        public class OnChainPaymentMethodPreviewResultAddressItem
+        {
+            /// <summary>
+            /// The key path relative to the account key path. 
+            /// </summary>
+            public string KeyPath { get; set; }
+            //The address generated at the key path
+            public string Address { get; set; }
+        }
+    }
+}

BTCPayServer.Client/Models/OnChainWalletAddressData.cs

@@ -0,0 +1,15 @@
+using NBitcoin;
+using NBitcoin.JsonConverters;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class OnChainWalletAddressData
+    {
+        public string Address { get; set; }
+        [JsonConverter(typeof(KeyPathJsonConverter))]
+        public KeyPath KeyPath { get; set; }
+
+        public string PaymentLink { get; set; }
+    }
+}

BTCPayServer.Client/Models/OnChainWalletFeeRateData.cs

@@ -0,0 +1,12 @@
+using NBitcoin;
+using NBitcoin.JsonConverters;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class OnChainWalletFeeRateData
+    {
+        [JsonConverter(typeof(FeeRateJsonConverter))]
+        public FeeRate FeeRate { get; set; }
+    }
+}

BTCPayServer.Client/Models/OnChainWalletOverviewData.cs

@@ -0,0 +1,17 @@
+using BTCPayServer.JsonConverters;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class OnChainWalletOverviewData
+    {
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal Balance { get; set; }
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal UnconfirmedBalance { get; set; }
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal ConfirmedBalance { get; set; }
+
+        public string Label { get; set; }
+    }
+}

BTCPayServer.Client/Models/OnChainWalletTransactionData.cs

@@ -0,0 +1,34 @@
+using System;
+using System.Collections.Generic;
+using BTCPayServer.JsonConverters;
+using NBitcoin;
+using NBitcoin.JsonConverters;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class OnChainWalletTransactionData
+    {
+        [JsonConverter(typeof(UInt256JsonConverter))]
+        public uint256 TransactionHash { get; set; }
+
+        public string Comment { get; set; }
+        public Dictionary<string, LabelData> Labels { get; set; } = new Dictionary<string, LabelData>();
+
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal Amount { get; set; }
+
+        [JsonConverter(typeof(UInt256JsonConverter))]
+        public uint256 BlockHash { get; set; }
+
+        public int? BlockHeight { get; set; }
+
+        public int Confirmations { get; set; }
+
+        [JsonConverter(typeof(DateTimeToUnixTimeConverter))]
+        public DateTimeOffset Timestamp { get; set; }
+
+        [JsonConverter(typeof(Newtonsoft.Json.Converters.StringEnumConverter))]
+        public TransactionStatus Status { get; set; }
+    }
+}

BTCPayServer.Client/Models/OnChainWalletUTXOData.cs

@@ -0,0 +1,26 @@
+using System;
+using System.Collections.Generic;
+using BTCPayServer.JsonConverters;
+using NBitcoin;
+using NBitcoin.JsonConverters;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class OnChainWalletUTXOData
+    {
+        public string Comment { get; set; }
+        [JsonConverter(typeof(NumericStringJsonConverter))]
+        public decimal Amount { get; set; }
+        [JsonConverter(typeof(OutpointJsonConverter))]
+        public OutPoint Outpoint { get; set; }
+        public string Link { get; set; }
+        public Dictionary<string, LabelData> Labels { get; set; }
+        [JsonConverter(typeof(DateTimeToUnixTimeConverter))]
+        public DateTimeOffset Timestamp { get; set; }
+        [JsonConverter(typeof(KeyPathJsonConverter))]
+        public KeyPath KeyPath { get; set; }
+        public string Address { get; set; }
+        public int Confirmations { get; set; }
+    }
+}

BTCPayServer.Client/Models/PullPaymentBaseData.cs

@@ -16,7 +16,7 @@ namespace BTCPayServer.Client.Models
         public string Currency { get; set; }
         [JsonConverter(typeof(NumericStringJsonConverter))]
         public decimal Amount { get; set; }
-        [JsonConverter(typeof(TimeSpanJsonConverter))]
+        [JsonConverter(typeof(TimeSpanJsonConverter.Seconds))]
         public TimeSpan? Period { get; set; }
         public bool Archived { get; set; }
         public string ViewLink { get; set; }

BTCPayServer.Client/Models/StoreBaseData.cs

@@ -16,11 +16,11 @@ namespace BTCPayServer.Client.Models
 
         public string Website { get; set; }
 
-        [JsonConverter(typeof(TimeSpanJsonConverter))]
+        [JsonConverter(typeof(TimeSpanJsonConverter.Seconds))]
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public TimeSpan InvoiceExpiration { get; set; } = TimeSpan.FromMinutes(15);
 
-        [JsonConverter(typeof(TimeSpanJsonConverter))]
+        [JsonConverter(typeof(TimeSpanJsonConverter.Seconds))]
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public TimeSpan MonitoringExpiration { get; set; } = TimeSpan.FromMinutes(60);
 
@@ -30,14 +30,23 @@ namespace BTCPayServer.Client.Models
         public double PaymentTolerance { get; set; } = 0;
         public bool AnyoneCanCreateInvoice { get; set; }
 
+
+        public bool RequiresRefundEmail { get; set; }
+        public bool LightningAmountInSatoshi { get; set; }
+        public bool LightningPrivateRouteHints { get; set; }
+        public bool OnChainWithLnInvoiceFallback { get; set; }
+        public bool LazyPaymentMethods { get; set; }
+        public bool RedirectAutomatically { get; set; }
+
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public bool ShowRecommendedFee { get; set; } = true;
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public int RecommendedFeeBlockTarget { get; set; } = 1;
-
+        
+        public string DefaultPaymentMethod { get; set; }
+        
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public string DefaultLang { get; set; } = "en";
-        public bool LightningAmountInSatoshi { get; set; }
 
         public string CustomLogo { get; set; }
 
@@ -45,16 +54,11 @@ namespace BTCPayServer.Client.Models
 
         public string HtmlTitle { get; set; }
 
-        public bool RedirectAutomatically { get; set; }
-
-        public bool RequiresRefundEmail { get; set; }
-
         [JsonConverter(typeof(StringEnumConverter))]
         [JsonProperty(NullValueHandling = NullValueHandling.Ignore)]
         public NetworkFeeMode NetworkFeeMode { get; set; } = NetworkFeeMode.Never;
 
         public bool PayJoinEnabled { get; set; }
-        public bool LightningPrivateRouteHints { get; set; }
 
 
         [JsonExtensionData]

BTCPayServer.Client/Models/StoreWebhookData.cs

@@ -0,0 +1,35 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class StoreWebhookBaseData
+    {
+        public class AuthorizedEventsData
+        {
+            public bool Everything { get; set; } = true;
+
+            [JsonProperty(ItemConverterType = typeof(Newtonsoft.Json.Converters.StringEnumConverter))]
+            public WebhookEventType[] SpecificEvents { get; set; } = Array.Empty<WebhookEventType>();
+        }
+
+        public bool Enabled { get; set; } = true;
+        [JsonProperty(DefaultValueHandling = DefaultValueHandling.Ignore)]
+        public string Secret { get; set; }
+        public bool AutomaticRedelivery { get; set; } = true;
+        public string Url { get; set; }
+        public AuthorizedEventsData AuthorizedEvents { get; set; } = new AuthorizedEventsData();
+    }
+    public class UpdateStoreWebhookRequest : StoreWebhookBaseData
+    {
+    }
+    public class CreateStoreWebhookRequest : StoreWebhookBaseData
+    {
+    }
+    public class StoreWebhookData : StoreWebhookBaseData
+    {
+        public string Id { get; set; }
+    }
+}

BTCPayServer.Client/Models/TransactionStatus.cs

@@ -0,0 +1,9 @@
+namespace BTCPayServer.Client.Models
+{
+    public enum TransactionStatus
+    {
+        Unconfirmed,
+        Confirmed,
+        Replaced
+    }
+}

BTCPayServer.Client/Models/UpdateInvoiceRequest.cs

@@ -0,0 +1,9 @@
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Client.Models
+{
+    public class UpdateInvoiceRequest
+    {
+        public JObject Metadata { get; set; }
+    }
+}

BTCPayServer.Client/Models/UpdateNotification.cs

@@ -0,0 +1,7 @@
+namespace BTCPayServer.Client.Models
+{
+    public class UpdateNotification
+    {
+        public bool? Seen { get; set; }
+    }
+}

BTCPayServer.Client/Models/WebhookDeliveryData.cs

@@ -0,0 +1,18 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Newtonsoft.Json;
+
+namespace BTCPayServer.Client.Models
+{
+    public class WebhookDeliveryData
+    {
+        public string Id { get; set; }
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset Timestamp { get; set; }
+        public int? HttpCode { get; set; }
+        public string ErrorMessage { get; set; }
+        [JsonConverter(typeof(Newtonsoft.Json.Converters.StringEnumConverter))]
+        public WebhookDeliveryStatus Status { get; set; }
+    }
+}

BTCPayServer.Client/Models/WebhookDeliveryStatus.cs

@@ -0,0 +1,13 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace BTCPayServer.Client.Models
+{
+    public enum WebhookDeliveryStatus
+    {
+        Failed,
+        HttpError,
+        HttpSuccess
+    }
+}

BTCPayServer.Client/Models/WebhookEvent.cs

@@ -0,0 +1,60 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+using Newtonsoft.Json.Linq;
+
+namespace BTCPayServer.Client.Models
+{
+    public class WebhookEvent
+    {
+        public readonly static JsonSerializerSettings DefaultSerializerSettings;
+        static WebhookEvent()
+        {
+            DefaultSerializerSettings = new JsonSerializerSettings();
+            DefaultSerializerSettings.ContractResolver = new Newtonsoft.Json.Serialization.CamelCasePropertyNamesContractResolver();
+            NBitcoin.JsonConverters.Serializer.RegisterFrontConverters(DefaultSerializerSettings);
+            DefaultSerializerSettings.Formatting = Formatting.None;
+        }
+        public string DeliveryId { get; set; }
+        public string WebhookId { get; set; }
+        string _OriginalDeliveryId;
+        public string OriginalDeliveryId
+        {
+            get
+            {
+                if (_OriginalDeliveryId is null)
+                {
+                    // Due to a typo in old version, we serialized `orignalDeliveryId` rather than `orignalDeliveryId`
+                    // We silently fix that here.
+                    // Note we can remove this code later on, as old webhook event are unlikely to be useful to anyone,
+                    // and having a null orignalDeliveryId is not end of the world
+                    if (AdditionalData != null &&
+                        AdditionalData.TryGetValue("orignalDeliveryId", out var tok))
+                    {
+                        _OriginalDeliveryId = tok.Value<string>();
+                        AdditionalData.Remove("orignalDeliveryId");
+                    }
+                }
+                return _OriginalDeliveryId;
+            }
+            set
+            {
+                _OriginalDeliveryId = value;
+            }
+        }
+        public bool IsRedelivery { get; set; }
+        [JsonConverter(typeof(StringEnumConverter))]
+        public WebhookEventType Type { get; set; }
+        [JsonConverter(typeof(NBitcoin.JsonConverters.DateTimeToUnixTimeConverter))]
+        public DateTimeOffset Timestamp { get; set; }
+        [JsonExtensionData]
+        public IDictionary<string, JToken> AdditionalData { get; set; }
+        public T ReadAs<T>()
+        {
+            var str = JsonConvert.SerializeObject(this, DefaultSerializerSettings);
+            return JsonConvert.DeserializeObject<T>(str, DefaultSerializerSettings);
+        }
+    }
+}

BTCPayServer.Client/Models/WebhookEventType.cs

@@ -0,0 +1,16 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace BTCPayServer.Client.Models
+{
+    public enum WebhookEventType
+    {
+        InvoiceCreated,
+        InvoiceReceivedPayment,
+        InvoiceProcessing,
+        InvoiceExpired,
+        InvoiceSettled,
+        InvoiceInvalid
+    }
+}

BTCPayServer.Client/Models/WebhookInvoiceEvent.cs

@@ -0,0 +1,85 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+using Newtonsoft.Json;
+using Newtonsoft.Json.Converters;
+
+namespace BTCPayServer.Client.Models
+{
+    public class WebhookInvoiceEvent : WebhookEvent
+    {
+        public WebhookInvoiceEvent()
+        {
+
+        }
+        public WebhookInvoiceEvent(WebhookEventType evtType)
+        {
+            this.Type = evtType;
+        }
+        [JsonProperty(Order = 1)]
+        public string StoreId { get; set; }
+        [JsonProperty(Order = 2)]
+        public string InvoiceId { get; set; }
+    }
+
+    public class WebhookInvoiceSettledEvent : WebhookInvoiceEvent
+    {
+        public WebhookInvoiceSettledEvent()
+        {
+
+        }
+        public WebhookInvoiceSettledEvent(WebhookEventType evtType) : base(evtType)
+        {
+        }
+
+        public bool ManuallyMarked { get; set; }
+    }
+    public class WebhookInvoiceInvalidEvent : WebhookInvoiceEvent
+    {
+        public WebhookInvoiceInvalidEvent()
+        {
+
+        }
+        public WebhookInvoiceInvalidEvent(WebhookEventType evtType) : base(evtType)
+        {
+        }
+
+        public bool ManuallyMarked { get; set; }
+    }
+    public class WebhookInvoiceProcessingEvent : WebhookInvoiceEvent
+    {
+        public WebhookInvoiceProcessingEvent()
+        {
+
+        }
+        public WebhookInvoiceProcessingEvent(WebhookEventType evtType) : base(evtType)
+        {
+        }
+
+        public bool OverPaid { get; set; }
+    }
+    public class WebhookInvoiceReceivedPaymentEvent : WebhookInvoiceEvent
+    {
+        public WebhookInvoiceReceivedPaymentEvent()
+        {
+
+        }
+        public WebhookInvoiceReceivedPaymentEvent(WebhookEventType evtType) : base(evtType)
+        {
+        }
+
+        public bool AfterExpiration { get; set; }
+    }
+    public class WebhookInvoiceExpiredEvent : WebhookInvoiceEvent
+    {
+        public WebhookInvoiceExpiredEvent()
+        {
+
+        }
+        public WebhookInvoiceExpiredEvent(WebhookEventType evtType) : base(evtType)
+        {
+        }
+
+        public bool PartiallyPaid { get; set; }
+    }
+}

BTCPayServer.Client/Permissions.cs

@@ -12,13 +12,17 @@ namespace BTCPayServer.Client
         public const string CanUseLightningNodeInStore = "btcpay.store.canuselightningnode";
         public const string CanModifyServerSettings = "btcpay.server.canmodifyserversettings";
         public const string CanModifyStoreSettings = "btcpay.store.canmodifystoresettings";
+        public const string CanModifyStoreWebhooks = "btcpay.store.webhooks.canmodifywebhooks";
         public const string CanModifyStoreSettingsUnscoped = "btcpay.store.canmodifystoresettings:";
         public const string CanViewStoreSettings = "btcpay.store.canviewstoresettings";
+        public const string CanViewInvoices = "btcpay.store.canviewinvoices";
         public const string CanCreateInvoice = "btcpay.store.cancreateinvoice";
         public const string CanViewPaymentRequests = "btcpay.store.canviewpaymentrequests";
         public const string CanModifyPaymentRequests = "btcpay.store.canmodifypaymentrequests";
         public const string CanModifyProfile = "btcpay.user.canmodifyprofile";
         public const string CanViewProfile = "btcpay.user.canviewprofile";
+        public const string CanManageNotificationsForUser = "btcpay.user.canmanagenotificationsforuser";
+        public const string CanViewNotificationsForUser = "btcpay.user.canviewnotificationsforuser";
         public const string CanCreateUser = "btcpay.server.cancreateuser";
         public const string CanManagePullPayments = "btcpay.store.canmanagepullpayments";
         public const string Unrestricted = "unrestricted";
@@ -26,7 +30,9 @@ namespace BTCPayServer.Client
         {
             get
             {
+                yield return CanViewInvoices;
                 yield return CanCreateInvoice;
+                yield return CanModifyStoreWebhooks;
                 yield return CanModifyServerSettings;
                 yield return CanModifyStoreSettings;
                 yield return CanViewStoreSettings;
@@ -35,6 +41,8 @@ namespace BTCPayServer.Client
                 yield return CanModifyProfile;
                 yield return CanViewProfile;
                 yield return CanCreateUser;
+                yield return CanManageNotificationsForUser;
+                yield return CanViewNotificationsForUser;
                 yield return Unrestricted;
                 yield return CanUseInternalLightningNode;
                 yield return CanCreateLightningInvoiceInternalNode;
@@ -153,6 +161,9 @@ namespace BTCPayServer.Client
                 return true;
             switch (subpolicy)
             {
+                case Policies.CanViewInvoices when this.Policy == Policies.CanModifyStoreSettings:
+                case Policies.CanModifyStoreWebhooks when this.Policy == Policies.CanModifyStoreSettings:
+                case Policies.CanViewInvoices when this.Policy == Policies.CanViewStoreSettings:
                 case Policies.CanViewStoreSettings when this.Policy == Policies.CanModifyStoreSettings:
                 case Policies.CanCreateInvoice when this.Policy == Policies.CanModifyStoreSettings:
                 case Policies.CanViewProfile when this.Policy == Policies.CanModifyProfile:
@@ -161,6 +172,7 @@ namespace BTCPayServer.Client
                 case Policies.CanViewPaymentRequests when this.Policy == Policies.CanViewStoreSettings:
                 case Policies.CanCreateLightningInvoiceInternalNode when this.Policy == Policies.CanUseInternalLightningNode:
                 case Policies.CanCreateLightningInvoiceInStore when this.Policy == Policies.CanUseLightningNodeInStore:
+                case Policies.CanViewNotificationsForUser when this.Policy == Policies.CanManageNotificationsForUser:
                     return true;
                 default:
                     return false;

BTCPayServer.Client/PushNuget.ps1

@@ -0,0 +1,7 @@
+rm "bin\release\" -Recurse -Force
+dotnet pack --configuration Release --include-symbols -p:SymbolPackageFormat=snupkg
+$package=(ls .\bin\Release\*.nupkg).FullName
+dotnet nuget push $package --source "https://api.nuget.org/v3/index.json"
+$ver = ((ls .\bin\release\*.nupkg)[0].Name -replace '.*(\d+\.\d+\.\d+)\.nupkg','$1')
+git tag -a "BTCPayServer.Client/v$ver" -m "BTCPayServer.Client/$ver"
+git push origin "BTCPayServer.Client/v$ver"

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Althash.cs

@@ -0,0 +1,29 @@
+using NBitcoin;
+using NBXplorer;
+
+namespace BTCPayServer
+{
+    public partial class BTCPayNetworkProvider
+    {
+        public void InitAlthash()
+        {
+            var nbxplorerNetwork = NBXplorerNetworkProvider.GetFromCryptoCode("HTML");
+            Add(new BTCPayNetwork()
+            {
+                CryptoCode = nbxplorerNetwork.CryptoCode,
+                DisplayName = "Althash",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://explorer.htmlcoin.com/api/tx/{0}" : "https://explorer.htmlcoin.com/api/tx/{0}",
+                NBXplorerNetwork = nbxplorerNetwork,
+                UriScheme = "htmlcoin",
+                DefaultRateRules = new[]
+                {
+                                "HTML_X = HTML_USD",
+                                "HTML_USD = hitbtc(HTML_USD)"
+                },
+                CryptoImagePath = "imlegacy/althash.png",
+                DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("88'") : new KeyPath("1'")
+            });
+        }
+    }
+}

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Argoneum.cs

@@ -11,7 +11,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Argoneum",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet
+                BlockExplorerLink = NetworkType == ChainName.Mainnet
                     ? "https://chainz.cryptoid.info/agm/tx.dws?{0}"
                     : "https://chainz.cryptoid.info/agm-test/tx.dws?{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
@@ -23,7 +23,7 @@ namespace BTCPayServer
                     },
                 CryptoImagePath = "imlegacy/argoneum.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("421'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("421'")
                     : new KeyPath("1'")
             });
         }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.BGold.cs

@@ -4,14 +4,14 @@ namespace BTCPayServer
 {
     public partial class BTCPayNetworkProvider
     {
-        public void InitBitcoinGold()
+        public void InitBGold()
         {
             var nbxplorerNetwork = NBXplorerNetworkProvider.GetFromCryptoCode("BTG");
             Add(new BTCPayNetwork()
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "BGold",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://explorer.bitcoingold.org/insight/tx/{0}/" : "https://test-explorer.bitcoingold.org/insight/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://btgexplorer.com/tx/{0}" : "https://testnet.btgexplorer.com/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "bitcoingold",
                 DefaultRateRules = new[]
@@ -22,7 +22,7 @@ namespace BTCPayServer
                 CryptoImagePath = "imlegacy/btg.svg",
                 LightningImagePath = "imlegacy/btg-lightning.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("156'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("156'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.BPlus.cs

@@ -0,0 +1,29 @@
+using NBitcoin;
+using NBXplorer;
+
+namespace BTCPayServer
+{
+    public partial class BTCPayNetworkProvider
+    {
+        public void InitBPlus()
+        {
+            var nbxplorerNetwork = NBXplorerNetworkProvider.GetFromCryptoCode("XBC");
+            Add(new BTCPayNetwork()
+            {
+                CryptoCode = nbxplorerNetwork.CryptoCode,
+                DisplayName = "BPlus",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://chainz.cryptoid.info/xbc/tx.dws?{0}" : "https://chainz.cryptoid.info/xbc/tx.dws?{0}",
+                NBXplorerNetwork = nbxplorerNetwork,
+                UriScheme = "bplus-fix-it",
+                DefaultRateRules = new[]
+                {
+                    "XBC_X = XBC_BTC * BTC_X",
+                    "XBC_BTC = cryptopia(XBC_BTC)"
+                },
+                CryptoImagePath = "imlegacy/xbc.png",
+                DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("65'") : new KeyPath("1'")
+            });
+        }
+    }
+}

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Bitcoinplus.cs

@@ -1,29 +0,0 @@
-using NBitcoin;
-using NBXplorer;
-
-namespace BTCPayServer
-{
-    public partial class BTCPayNetworkProvider
-    {
-        public void InitBitcoinplus()
-        {
-            var nbxplorerNetwork = NBXplorerNetworkProvider.GetFromCryptoCode("XBC");
-            Add(new BTCPayNetwork()
-            {
-                CryptoCode = nbxplorerNetwork.CryptoCode,
-                DisplayName = "Bitcoinplus",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://chainz.cryptoid.info/xbc/tx.dws?{0}" : "https://chainz.cryptoid.info/xbc/tx.dws?{0}",
-                NBXplorerNetwork = nbxplorerNetwork,
-                UriScheme = "bitcoinplus",
-                DefaultRateRules = new[]
-                {
-                                "XBC_X = XBC_BTC * BTC_X",
-                                "XBC_BTC = cryptopia(XBC_BTC)"
-                },
-                CryptoImagePath = "imlegacy/bitcoinplus.png",
-                DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("65'") : new KeyPath("1'")
-            });
-        }
-    }
-}

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Bitcore.cs

@@ -11,8 +11,8 @@ namespace BTCPayServer
             Add(new BTCPayNetwork()
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
-                DisplayName = "Bitcore",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://insight.bitcore.cc/tx/{0}" : "https://insight.bitcore.cc/tx/{0}",
+                DisplayName = "BitCore",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://explorer.bitcore.cc/tx/{0}" : "https://explorer.bitcore.cc/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "bitcore",
                 DefaultRateRules = new[]
@@ -23,7 +23,7 @@ namespace BTCPayServer
                 CryptoImagePath = "imlegacy/bitcore.svg",
                 LightningImagePath = "imlegacy/bitcore-lightning.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("160'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("160'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Chaincoin.cs

@@ -11,7 +11,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Chaincoin",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet
+                BlockExplorerLink = NetworkType == ChainName.Mainnet
                     ? "https://explorer.chaincoin.org/Explorer/Transaction/{0}"
                     : "https://test.explorer.chaincoin.org/Explorer/Transaction/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
@@ -24,7 +24,7 @@ namespace BTCPayServer
                 CryptoImagePath = "imlegacy/chaincoin.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
                 //https://github.com/satoshilabs/slips/blob/master/slip-0044.md
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("711'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("711'")
                     : new KeyPath("1'")
             });
         }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Dash.cs

@@ -12,7 +12,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Dash",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet
+                BlockExplorerLink = NetworkType == ChainName.Mainnet
                     ? "https://insight.dash.org/insight/tx/{0}"
                     : "https://testnet-insight.dashevo.org/insight/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
@@ -20,12 +20,12 @@ namespace BTCPayServer
                 DefaultRateRules = new[]
                     {
                         "DASH_X = DASH_BTC * BTC_X",
-                        "DASH_BTC = bittrex(DASH_BTC)"
+                        "DASH_BTC = bitfinex(DSH_BTC)"
                     },
                 CryptoImagePath = "imlegacy/dash.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
                 //https://github.com/satoshilabs/slips/blob/master/slip-0044.md
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("5'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("5'")
                     : new KeyPath("1'")
             });
         }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Dogecoin.cs

@@ -12,7 +12,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Dogecoin",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://dogechain.info/tx/{0}" : "https://dogechain.info/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://dogechain.info/tx/{0}" : "https://dogechain.info/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "dogecoin",
                 DefaultRateRules = new[]
@@ -22,7 +22,7 @@ namespace BTCPayServer
                 },
                 CryptoImagePath = "imlegacy/dogecoin.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("3'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("3'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Feathercoin.cs

@@ -12,7 +12,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Feathercoin",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://explorer.feathercoin.com/tx/{0}" : "https://explorer.feathercoin.com/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://explorer.feathercoin.com/tx/{0}" : "https://explorer.feathercoin.com/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "feathercoin",
                 DefaultRateRules = new[]
@@ -22,7 +22,7 @@ namespace BTCPayServer
                 },
                 CryptoImagePath = "imlegacy/feathercoin.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("8'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("8'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Groestlcoin.cs

@@ -11,7 +11,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Groestlcoin",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet
+                BlockExplorerLink = NetworkType == ChainName.Mainnet
                     ? "https://chainz.cryptoid.info/grs/tx.dws?{0}.htm"
                     : "https://chainz.cryptoid.info/grs-test/tx.dws?{0}.htm",
                 NBXplorerNetwork = nbxplorerNetwork,
@@ -24,9 +24,10 @@ namespace BTCPayServer
                 CryptoImagePath = "imlegacy/groestlcoin.png",
                 LightningImagePath = "imlegacy/groestlcoin-lightning.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("17'") : new KeyPath("1'"),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("17'") : new KeyPath("1'"),
                 SupportRBF = true,
-                SupportPayJoin = true
+                SupportPayJoin = true,
+                VaultSupported = true
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Litecoin.cs

@@ -13,7 +13,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Litecoin",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet
+                BlockExplorerLink = NetworkType == ChainName.Mainnet
                     ? "https://live.blockcypher.com/ltc/tx/{0}/"
                     : "http://explorer.litecointools.com/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
@@ -26,9 +26,9 @@ namespace BTCPayServer
                 CryptoImagePath = "imlegacy/litecoin.svg",
                 LightningImagePath = "imlegacy/litecoin-lightning.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("2'") : new KeyPath("1'"),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("2'") : new KeyPath("1'"),
                 //https://github.com/pooler/electrum-ltc/blob/0d6989a9d2fb2edbea421c116e49d1015c7c5a91/electrum_ltc/constants.py
-                ElectrumMapping = NetworkType == NetworkType.Mainnet
+                ElectrumMapping = NetworkType == ChainName.Mainnet
                     ? new Dictionary<uint, DerivationType>()
                     {
                         {0x0488b21eU, DerivationType.Legacy },

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Monacoin.cs

@@ -12,7 +12,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Monacoin",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://mona.insight.monaco-ex.org/insight/tx/{0}" : "https://testnet-mona.insight.monaco-ex.org/insight/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://mona.insight.monaco-ex.org/insight/tx/{0}" : "https://testnet-mona.insight.monaco-ex.org/insight/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "monacoin",
                 DefaultRateRules = new[]
@@ -23,7 +23,7 @@ namespace BTCPayServer
                 CryptoImagePath = "imlegacy/monacoin.png",
                 LightningImagePath = "imlegacy/mona-lightning.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("22'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("22'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.MonetaryUnit.cs

@@ -0,0 +1,29 @@
+using NBitcoin;
+using NBXplorer;
+
+namespace BTCPayServer
+{
+    public partial class BTCPayNetworkProvider
+    {
+        public void InitMonetaryUnit()
+        {
+            var nbxplorerNetwork = NBXplorerNetworkProvider.GetFromCryptoCode("MUE");
+            Add(new BTCPayNetwork()
+            {
+                CryptoCode = nbxplorerNetwork.CryptoCode,
+                DisplayName = "MonetaryUnit",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://explorer.monetaryunit.org/#/MUE/mainnet/tx/{0}" : "https://explorer.monetaryunit.org/#/MUE/mainnet/tx/{0}",
+                NBXplorerNetwork = nbxplorerNetwork,
+                UriScheme = "monetaryunit",
+                DefaultRateRules = new[]
+                {
+                                "MUE_X = MUE_BTC * BTC_X",
+                                "MUE_BTC = bittrex(MUE_BTC)"
+                },
+                CryptoImagePath = "imlegacy/monetaryunit.png",
+                DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("31'") : new KeyPath("1'")
+            });
+        }
+    }
+}

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Polis.cs

@@ -12,7 +12,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Polis",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://blockbook.polispay.org/tx/{0}" : "https://blockbook.polispay.org/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://blockbook.polispay.org/tx/{0}" : "https://blockbook.polispay.org/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "polis",
                 DefaultRateRules = new[]
@@ -22,7 +22,7 @@ namespace BTCPayServer
                 },
                 CryptoImagePath = "imlegacy/polis.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("1997'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("1997'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Ufo.cs

@@ -12,7 +12,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Ufo",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://chainz.cryptoid.info/ufo/tx.dws?{0}" : "https://chainz.cryptoid.info/ufo/tx.dws?{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://chainz.cryptoid.info/ufo/tx.dws?{0}" : "https://chainz.cryptoid.info/ufo/tx.dws?{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "ufo",
                 DefaultRateRules = new[]
@@ -22,7 +22,7 @@ namespace BTCPayServer
                 },
                 CryptoImagePath = "imlegacy/ufo.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("202'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("202'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/BTCPayNetworkProvider.Viacoin.cs

@@ -12,7 +12,7 @@ namespace BTCPayServer
             {
                 CryptoCode = nbxplorerNetwork.CryptoCode,
                 DisplayName = "Viacoin",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://explorer.viacoin.org/tx/{0}" : "https://explorer.viacoin.org/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://explorer.viacoin.org/tx/{0}" : "https://explorer.viacoin.org/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "viacoin",
                 DefaultRateRules = new[]
@@ -22,7 +22,7 @@ namespace BTCPayServer
                 },
                 CryptoImagePath = "imlegacy/viacoin.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("14'") : new KeyPath("1'")
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("14'") : new KeyPath("1'")
             });
         }
     }

BTCPayServer.Common/Altcoins/Ethereum/BTCPayNetworkProvider.Ethereum.cs

@@ -0,0 +1,78 @@
+#if ALTCOINS
+using NBitcoin;
+
+namespace BTCPayServer
+{
+    public partial class BTCPayNetworkProvider
+    {
+        public void InitEthereum()
+        {
+            Add(new EthereumBTCPayNetwork()
+            {
+                CryptoCode = "ETH",
+                DisplayName = "Ethereum",
+                DefaultRateRules = new[] {"ETH_X = ETH_BTC * BTC_X", "ETH_BTC = kraken(ETH_BTC)"},
+                BlockExplorerLink =
+                    NetworkType == ChainName.Mainnet
+                        ? "https://etherscan.io/address/{0}"
+                        : "https://ropsten.etherscan.io/address/{0}",
+                CryptoImagePath = "/imlegacy/eth.png",
+                ShowSyncSummary = true,
+                CoinType = NetworkType == ChainName.Mainnet? 60 : 1,
+                ChainId = NetworkType == ChainName.Mainnet ? 1 : 3,
+                Divisibility = 18,
+            });
+        }
+        
+        public void InitERC20()
+        {
+            if (NetworkType != ChainName.Mainnet)
+            {
+                Add(new ERC20BTCPayNetwork()
+                {
+                    CryptoCode = "FAU",
+                    DisplayName = "Faucet Token",
+                    DefaultRateRules = new[]
+                    {
+                        "FAU_X = FAU_BTC * BTC_X",
+                        "FAU_BTC = 0.01",
+                    },
+                    BlockExplorerLink = "https://ropsten.etherscan.io/address/{0}#tokentxns",
+                    ShowSyncSummary = false,
+                    CoinType =  1,
+                    ChainId =  3,
+                    //use https://erc20faucet.com for testnet
+                    SmartContractAddress = "0xFab46E002BbF0b4509813474841E0716E6730136",
+                    Divisibility = 18,
+                    CryptoImagePath = "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAQAAAC1HAwCAAAAC0lEQVR42mNkYAAAAAYAAjCB0C8AAAAASUVORK5CYII=",
+                });
+            }
+            else
+            {
+                Add(new ERC20BTCPayNetwork()
+                {
+                    CryptoCode = "USDT20",
+                    DisplayName = "Tether USD (ERC20)",
+                    DefaultRateRules = new[]
+                    {
+                        "USDT20_UST = 1",
+                        "USDT20_X = USDT20_BTC * BTC_X",
+                        "USDT20_BTC = bitfinex(UST_BTC)",
+                    },
+                    BlockExplorerLink =
+                        NetworkType == ChainName.Mainnet
+                            ? "https://etherscan.io/address/{0}#tokentxns"
+                            : "https://ropsten.etherscan.io/address/{0}#tokentxns",
+                    CryptoImagePath = "/imlegacy/liquid-tether.svg",
+                    ShowSyncSummary = false,
+                    CoinType = NetworkType == ChainName.Mainnet? 60 : 1,
+                    ChainId = NetworkType == ChainName.Mainnet ? 1 : 3,
+                    SmartContractAddress = "0xdAC17F958D2ee523a2206206994597C13D831ec7",
+                    Divisibility = 6
+                });
+            }
+            
+        }
+    }
+}
+#endif

BTCPayServer.Common/Altcoins/Ethereum/EthereumBTCPayNetwork.cs

@@ -0,0 +1,20 @@
+#if ALTCOINS
+namespace BTCPayServer
+{
+    public class EthereumBTCPayNetwork : BTCPayNetworkBase
+    {
+        public int ChainId { get; set; }
+        public int CoinType { get; set; }
+
+        public string GetDefaultKeyPath()
+        {
+            return $"m/44'/{CoinType}'/0'/0/x";
+        }
+    }
+
+    public class ERC20BTCPayNetwork : EthereumBTCPayNetwork
+    {
+        public string SmartContractAddress { get; set; }
+    }
+}
+#endif

BTCPayServer.Common/Altcoins/Ethereum/EthereumExtensions.cs

@@ -0,0 +1,20 @@
+#if ALTCOINS
+using System.Collections.Generic;
+using System.Linq;
+
+namespace BTCPayServer
+{
+    public static class EthereumExtensions
+    {
+        
+        public static IEnumerable<string> GetAllEthereumSubChains(this BTCPayNetworkProvider networkProvider, BTCPayNetworkProvider unfiltered)
+        {
+            var ethBased = networkProvider.GetAll().OfType<EthereumBTCPayNetwork>();
+            var chainId = ethBased.Select(network => network.ChainId).Distinct();
+            return unfiltered.GetAll().OfType<EthereumBTCPayNetwork>()
+                .Where(network => chainId.Contains(network.ChainId))
+                .Select(network => network.CryptoCode.ToUpperInvariant());
+        }
+    }
+}
+#endif

BTCPayServer.Common/Altcoins/Liquid/BTCPayNetworkProvider.Liquid.cs

@@ -13,7 +13,7 @@ namespace BTCPayServer
             var nbxplorerNetwork = NBXplorerNetworkProvider.GetFromCryptoCode("LBTC");
             Add(new ElementsBTCPayNetwork()
             {
-                AssetId = NetworkType == NetworkType.Mainnet ? ElementsParams<Liquid>.PeggedAssetId : ElementsParams<Liquid.LiquidRegtest>.PeggedAssetId,
+                AssetId = NetworkType == ChainName.Mainnet ? ElementsParams<Liquid>.PeggedAssetId : ElementsParams<Liquid.LiquidRegtest>.PeggedAssetId,
                 CryptoCode = "LBTC",
                 NetworkCryptoCode = "LBTC",
                 DisplayName = "Liquid Bitcoin",
@@ -22,12 +22,12 @@ namespace BTCPayServer
                     "LBTC_X = LBTC_BTC * BTC_X",
                     "LBTC_BTC = 1",
                 },
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "liquidnetwork",
                 CryptoImagePath = "imlegacy/liquid.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
                 SupportRBF = true
             });
         }

BTCPayServer.Common/Altcoins/Liquid/BTCPayNetworkProvider.LiquidAssets.cs

@@ -21,12 +21,12 @@ namespace BTCPayServer
                 },
                 AssetId = new uint256("ce091c998b83c78bb71a632313ba3760f1763d9cfcffae02258ffa9865a37bd2"),
                 DisplayName = "Liquid Tether",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "liquidnetwork",
                 CryptoImagePath = "imlegacy/liquid-tether.svg",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
                 SupportRBF = true,
                 SupportLightning = false
             });
@@ -45,12 +45,12 @@ namespace BTCPayServer
                 Divisibility = 2,
                 AssetId = new uint256("aa775044c32a7df391902b3659f46dfe004ccb2644ce2ddc7dba31e889391caf"),
                 DisplayName = "Ethiopian Birr",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "liquidnetwork",
                 CryptoImagePath = "imlegacy/etb.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
                 SupportRBF = true,
                 SupportLightning = false
             });
@@ -68,12 +68,12 @@ namespace BTCPayServer
                 },
                 AssetId = new uint256("0e99c1a6da379d1f4151fb9df90449d40d0608f6cb33a5bcbfc8c265f42bab0a"),
                 DisplayName = "Liquid CAD",
-                BlockExplorerLink = NetworkType == NetworkType.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
+                BlockExplorerLink = NetworkType == ChainName.Mainnet ? "https://blockstream.info/liquid/tx/{0}" : "https://blockstream.info/testnet/liquid/tx/{0}",
                 NBXplorerNetwork = nbxplorerNetwork,
                 UriScheme = "liquidnetwork",
                 CryptoImagePath = "imlegacy/lcad.png",
                 DefaultSettings = BTCPayDefaultSettings.GetDefaultSettings(NetworkType),
-                CoinType = NetworkType == NetworkType.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
+                CoinType = NetworkType == ChainName.Mainnet ? new KeyPath("1776'") : new KeyPath("1'"),
                 SupportRBF = true,
                 SupportLightning = false
             });

BTCPayServer.Common/Altcoins/Liquid/ElementsLikeBtcPayNetwork.cs

@@ -24,38 +24,22 @@ namespace BTCPayServer
             });
         }
 
-        public override GetTransactionsResponse FilterValidTransactions(GetTransactionsResponse response)
+        public override List<TransactionInformation> FilterValidTransactions(List<TransactionInformation> transactionInformationSet)
         {
-            TransactionInformationSet Filter(TransactionInformationSet transactionInformationSet)
-            {
-                return new TransactionInformationSet()
-                {
-                    Transactions =
-                        transactionInformationSet.Transactions.FindAll(information =>
-                            information.Outputs.Any(output =>
-                                output.Value is AssetMoney assetMoney && assetMoney.AssetId == AssetId) ||
-                            information.Inputs.Any(output =>
-                                output.Value is AssetMoney assetMoney && assetMoney.AssetId == AssetId))
-                };
-            }
-
-            return new GetTransactionsResponse()
-            {
-                Height = response.Height,
-                ConfirmedTransactions = Filter(response.ConfirmedTransactions),
-                ReplacedTransactions = Filter(response.ReplacedTransactions),
-                UnconfirmedTransactions = Filter(response.UnconfirmedTransactions)
-            };
+            return transactionInformationSet.FindAll(information =>
+                information.Outputs.Any(output =>
+                    output.Value is AssetMoney assetMoney && assetMoney.AssetId == AssetId) ||
+                information.Inputs.Any(output =>
+                    output.Value is AssetMoney assetMoney && assetMoney.AssetId == AssetId));
         }
 
-
         public override string GenerateBIP21(string cryptoInfoAddress, Money cryptoInfoDue)
         {
             //precision 0: 10 = 0.00000010
             //precision 2: 10 = 0.00001000
             //precision 8: 10 = 10
-            var money = new Money(cryptoInfoDue.ToDecimal(MoneyUnit.BTC) / decimal.Parse("1".PadRight(1 + 8 - Divisibility, '0')), MoneyUnit.BTC);
-            return $"{base.GenerateBIP21(cryptoInfoAddress, money)}&assetid={AssetId}";
+            var money = cryptoInfoDue is null? null: new Money(cryptoInfoDue.ToDecimal(MoneyUnit.BTC) / decimal.Parse("1".PadRight(1 + 8 - Divisibility, '0')), MoneyUnit.BTC);
+            return $"{base.GenerateBIP21(cryptoInfoAddress, money)}{(money is null? "?": "&")}assetid={AssetId}";
         }
     }
 }

BTCPayServer.Common/Altcoins/Liquid/LiquidExtensions.cs

@@ -6,11 +6,11 @@ namespace BTCPayServer
 {
     public static class LiquidExtensions
     {
-        public static IEnumerable<string> GetAllElementsSubChains(this BTCPayNetworkProvider networkProvider, BTCPayNetworkProvider unfilteredNetworkProvider)
+        public static IEnumerable<string> GetAllElementsSubChains(this BTCPayNetworkProvider networkProvider, BTCPayNetworkProvider unfiltered)
         {
             var elementsBased = networkProvider.GetAll().OfType<ElementsBTCPayNetwork>();
             var parentChains = elementsBased.Select(network => network.NetworkCryptoCode.ToUpperInvariant()).Distinct();
-            return unfilteredNetworkProvider.GetAll().OfType<ElementsBTCPayNetwork>()
+            return unfiltered.GetAll().OfType<ElementsBTCPayNetwork>()
                 .Where(network => parentChains.Contains(network.NetworkCryptoCode)).Select(network => network.CryptoCode.ToUpperInvariant());
         }
     }