Telegram CAPTCHA Bot Application

This application manages Telegram bots that use webhooks to implement CAPTCHA and anti-spam verification when users join chats.

Features:

• Webhook server initialization and management
• Dynamic bot registration and removal
• Event handling via gen_event
• Per-bot HTTP connection pools
• User moderation (mute / ban)

Architecture:

• application behaviour — entry point
• gen_server — state management
• supervisor — child process management
• webhook server — receives Telegram updates

Configuration example (sys.config):

  {telegram_bot_captcha, [
    {webhook, #{
        ip => ~"0.0.0.0",
        port => 8443,
        secret_token => ~"secret",
        transport_opts => #{certfile => "..."}
    }},
    {bots, [BotConfig]}
  ]}.