JFA.Telegram.Login 1.0.0

JFA.Telegram.Login

Service for Telegram login widget

Steps

0. Install package

NuGet\Install-Package JFA.Database.Sqlite -Version <VERSION>

1. Add bot token to appsettings.json

"TelegramOption": {
    "LoginWidgetBotToken": "<BOT_TOKEN>"
  }

2. Add telegram auth services

builder.Services.AddScoped<ITelegramUser, TelegramUserValidator>();
builder.Services.Configure<TelegramOption>(builder.Configuration.GetSection(nameof(TelegramOption)));

3. Add controller action

    [HttpGet]
    public IActionResult Login([FromQuery] TelegramUser user,
        [FromServices] ITelegramUser telegramUser,
        [FromServices] IOptions<TelegramOption> options)
    {
        if (telegramUser.Validate(user, out _, options.Value.LoginWidgetBotToken))
        {
            return Ok(user);
        }

        return Unauthorized();
    }

4. Widget configuration

• Create a bot or use an existing one from @BotFather
• Link your website's domain to the bot
• Generate embed code. https://core.telegram.org/widgets/login

  4.1 Embed Code

  <script async src="https://telegram.org/js/telegram-widget.js?21"
      data-telegram-login="<BOT_USERNAME>" data-size="large"
      data-radius="5" data-auth-url="<REDIRECT_URL>"
      data-request-access="write">
  </script>