Nethereum.Wallet.UI.Components.Avalonia

NuGet: Nethereum.Wallet.UI.Components.Avalonia | Source: src/Nethereum.Wallet.UI.Components.Avalonia/ Avalonia host controls, services and DI registration for the Nethereum wallet UI components

Overview

Nethereum.Wallet.UI.Components.Avalonia is the Avalonia (desktop) front end for Nethereum.Wallet.UI.Components, the framework-neutral wallet view models. It gives an Avalonia 11 application a ready wallet: the NethereumWallet control (create or unlock the vault, account list, account creation, dashboard), platform services for vault, settings, dialogs and notifications, converters and templates, and one DI extension that registers all of it. Use it to put the Nethereum wallet into an Avalonia app. For Blazor use Nethereum.Wallet.UI.Components.Blazor; for the wallet engine itself (vault, accounts, RPC handlers) see Nethereum.Wallet.

Installation

dotnet add package Nethereum.Wallet.UI.Components.Avalonia

Targets net10.0 (the build's WalletUIFrameworks). Package references: Avalonia 11.3.4 (Avalonia, Avalonia.Desktop, Avalonia.Fonts.Inter, Avalonia.ReactiveUI, Avalonia.Themes.Fluent; Avalonia.Diagnostics in Debug builds), CommunityToolkit.Mvvm 8.4.0 and System.Security.Cryptography.ProtectedData 9.0.0. Project references: Nethereum.Wallet.RpcRequests, Nethereum.Wallet.UI.Components and Nethereum.Wallet.

Test coverage

tests/Nethereum.Wallet.UI.Components.Avalonia.UnitTests holds this package's README traceability tests and the registration tests shown under Registration. The controls themselves need a running Avalonia application and have no behaviour tests, so the control, service and converter blocks below are declaration-only, copied from the source.

Registration

Namespace Nethereum.Wallet.UI.Components.Avalonia.Extensions.

public static class ServiceCollectionExtensions
{
    public static IServiceCollection AddNethereumWalletAvaloniaComponents(
        this IServiceCollection services, Action<AvaloniaWalletComponentOptions>? configure = null)
}

public class AvaloniaWalletComponentOptions
{
    public long DefaultChainId { get; set; } = 1;
}

AddNethereumWalletAvaloniaComponents uses TryAdd registrations, so services you register first win. It adds:

Registration	Implementation
IWalletVaultService (singleton)	AvaloniaWalletVaultService
IWalletStorageService (singleton)	AvaloniaWalletStorageService
IDappPermissionService (singleton)	DefaultDappPermissionService
IWalletDialogService (scoped)	AvaloniaWalletDialogService
IChainAdditionPromptService (scoped)	QueuedChainAdditionPromptService
ILoginSessionState (singleton), ILoginPromptService (scoped)	LoginSessionState, LoginPromptService
ILocalizationStorageProvider, IWalletLocalizationService	SystemLocalizationStorageProvider, WalletLocalizationService

It also calls AddWalletPromptServices, AddNethereumWalletServicesSingleton(options.DefaultChainId) and AddPendingTransactionNotifications, registers NethereumWalletLocalizer, the transient view models NethereumWalletViewModel, AccountListViewModel, CreateAccountViewModel and WalletHostViewModel, the transient WalletHostControl, and an internal hosted service that registers the wallet RPC handlers (WalletRpcHandlerRegistration.RegisterAll) on the RpcHandlerRegistry at host start. The AvaloniaWalletComponentOptions instance is registered as a singleton.

var services = new ServiceCollection();
services.AddNethereumWalletAvaloniaComponents(options => options.DefaultChainId = 10);
using var provider = services.BuildServiceProvider();

var options = provider.GetRequiredService<AvaloniaWalletComponentOptions>();
var vaultService = provider.GetRequiredService<IWalletVaultService>();
var storageService = provider.GetRequiredService<IWalletStorageService>();

options.DefaultChainId is 10, vaultService is an AvaloniaWalletVaultService and storageService an AvaloniaWalletStorageService. Backed by AvaloniaWalletRegistrationTests.Given_TheAvaloniaWalletComponents_When_TheyAreRegistered_Then_TheOptionsAndPlatformServicesResolve (DocSection.WalletUI, avalonia-wallet-components, Order 1) in tests/Nethereum.Wallet.UI.Components.Avalonia.UnitTests. Because the registrations use TryAdd, a service you add first is kept: with IWalletVaultService registered before the call, that registration is what resolves (Given_AVaultServiceRegisteredFirst_When_TheAvaloniaComponentsAreRegistered_Then_TheExistingRegistrationWins, Order 2).

Controls

Namespace Nethereum.Wallet.UI.Components.Avalonia.Views.

• NethereumWallet : UserControl - the full wallet shell. Styled properties include OnConnectedCommand (ICommand), Width and Height (string), DrawerBehavior, ResponsiveBreakpoint, SidebarWidth, ShowLogo, ShowApplicationName, ShowNetworkInHeader and ShowAccountDetailsInHeader; it exposes the create-wallet and login texts, password visibility commands and Config.
• WalletHostControl : UserControl - a small host. Constructor WalletHostControl(WalletHostViewModel viewModel); it initialises the view model, shows "Wallet unlocked" and "Accounts detected" status, and a "Pending request" overlay (dApp name, type, origin and a Dismiss button) while a prompt is active.
• AccountListComponent, AccountCard, AccountTypeSelectionComponent, AccountTypeCard, CreateAccount, WalletFormLayout, LoadingOverlay, and Dashboard/WalletDashboard.
• Account creation forms: WalletAccounts/Mnemonic/MnemonicAccountCreation, WalletAccounts/PrivateKey/PrivateKeyAccountCreation, WalletAccounts/ViewOnly/ViewOnlyAccountCreation.
• Shared building blocks (Views/Shared): NotificationBadge, WalletAddressDisplay, WalletContentSection (with WalletSpacing), WalletFormSection, WalletHeader, WalletInfoCard (with WalletInfoSeverity), WalletSegmentedControl (with WalletSegmentOption), WalletTextField (with WalletTextFieldType) and WalletWordChips.

public partial class WalletHostViewModel : ObservableObject, IDisposable
{
    public NethereumWalletViewModel Wallet { get; }

    public WalletHostViewModel(NethereumWalletViewModel wallet, IPromptOverlayService overlayService)

    public async Task InitializeAsync()
    public void Dispose()
}

WalletHostViewModel also carries the observable properties CurrentPrompt (PromptRequest?) and IsOverlayVisible and the generated DismissPromptCommand, which hides the overlay.

Account-creation form types, with their nested step enums:

public enum FormStep { Setup = 0, Mnemonic = 1, Security = 2 }

public enum FormStep { Setup = 0, PrivateKey = 1, Confirm = 2 }

public enum FormStep { Setup = 0, Address = 1, Confirm = 2 }

public class WalletFormStep
{
    public string LocalizationKey { get; set; }
    public string Icon { get; set; }
}

public class WalletSegmentedControlOption
{
    public bool Value { get; set; }
    public string Title { get; set; }
    public string Description { get; set; }
    public string Icon { get; set; }
}

The three FormStep enums are nested in MnemonicAccountCreation, PrivateKeyAccountCreation and ViewOnlyAccountCreation respectively (the first for the mnemonic form, the second for the private-key form, the third for the view-only form). WalletFormStep is in Views and WalletSegmentedControlOption is declared in the MnemonicAccountCreation file.

The default theme is Themes/DefaultTheme.axaml (a Styles file defining the colour and brush resources the controls use).

Services

Namespace Nethereum.Wallet.UI.Components.Avalonia.Services.

public class AvaloniaWalletVaultService : WalletVaultServiceBase
{
    public AvaloniaWalletVaultService()
    public override Task<bool> VaultExistsAsync()
}

public class AvaloniaWalletStorageService : IWalletStorageService
{
    public AvaloniaWalletStorageService()
}

public class AvaloniaWalletDialogService : IWalletDialogService
{
    public async Task<bool> ShowConfirmationAsync(string title, string message)
    public async Task ShowMessageAsync(string title, string message)
    public async Task<T?> ShowDialogAsync<T>(object? parameters = null) where T : class
    public async Task<bool> ShowWarningConfirmationAsync(string title, string message, string confirmText = "Remove", string cancelText = "Cancel")
    public async Task ShowErrorAsync(string title, string message)
    public async Task ShowSuccessAsync(string title, string message)
}

public class AvaloniaWalletNotificationService : IWalletNotificationService
{
    public void ShowNotification(string message, NotificationSeverity severity = NotificationSeverity.Info)
    public void ShowSuccess(string message)
    public void ShowError(string message)
    public void ShowWarning(string message)
    public void ShowInfo(string message)
    public void ShowNotificationWithAction(string message, NotificationSeverity severity, NotificationAction action)
    public void ShowSuccessWithAction(string message, NotificationAction action)
    public void ShowInfoWithAction(string message, NotificationAction action)
}

public interface INotifyWalletLoadingService : IWalletLoadingService

Storage behaviour taken from the source:

• AvaloniaWalletVaultService keeps the encrypted vault in vault.dat under {ApplicationData}/NethereumWallet. The file content is protected again at rest: Windows uses ProtectedData with DataProtectionScope.CurrentUser; macOS and Linux use AES with a key derived from SHA256(MachineName + UserName) and a zero IV; other platforms store the bytes unprotected. This is a convenience layer on top of the vault's own password encryption, not a replacement for it.
• AvaloniaWalletStorageService implements IWalletStorageService (defined in Nethereum.Wallet.Storage; its member list is not repeated here) and stores JSON files in the same NethereumWallet folder (for example networks.json for user networks and dapp-permissions-index.json for dApp permissions).

Register your own IWalletVaultService or IWalletStorageService before calling AddNethereumWalletAvaloniaComponents to replace either.

Converters, templates and markup extensions

• Converters: AccountTypeToBrushConverter, AddressToBrushConverter, BoolAndBoolConverter, BoolAndObjectEqualsToBoolConverter, BoolNotConverter, BoolToBrushConverter, BoolToIconConverter, BoolToIconDataConverter, BoolToSeverityConverter, BoolToStringConverter, ColorLightenConverter, FormatAddressConverter, IconMappingConverter, IconToPathDataConverter, IsFirstItemConverter, IsLastItemConverter, LocalizationConverter, StringToBrushConverter, plus the static helpers ObjectConverters and StringConverters and the generic FuncValueConverter<TIn, TParam, TOut> / FuncValueConverter<TIn, TOut>.
• DataTemplates (IDataTemplate selectors): CreateAccountFormStepTemplateSelector, DashboardPluginTemplateSelector, MnemonicFormStepTemplateSelector, PrivateKeyFormStepTemplateSelector, ViewOnlyFormStepTemplateSelector, WalletStateTemplateSelector.
• Extensions: IconPathExtension (a MarkupExtension) and IconMappingExtensions.