Классовые обработчики

import asyncio
from maxgram import Bot, Dispatcher, Router
from maxgram.filters import Command
from maxgram.handlers import (
    MessageHandler,
    MessageHandlerCommandMixin,
    CallbackHandler,
    ErrorHandler,
)

bot = Bot(token="YOUR_BOT_TOKEN")
dp = Dispatcher()
router = Router()

# Обработчик сообщений
class EchoHandler(MessageHandler):
    async def handle(self):
        text = self.event.body.text or "No text"
        await self.event.answer(text=f"Echo: {text}")

# Обработчик команд с миксином
class HelpHandler(MessageHandlerCommandMixin, MessageHandler):
    async def handle(self):
        name = self.from_user.first_name if self.from_user else "User"
        await self.event.answer(
            text=f"Hello, {name}!\n"
            f"Available commands: /help, /echo"
        )

# Обработчик callback
class ButtonHandler(CallbackHandler):
    async def handle(self):
        user = self.from_user.first_name
        await self.event.answer(
            notification=f"{user} clicked a button!"
        )

# Обработчик ошибок
class GlobalErrorHandler(ErrorHandler):
    async def handle(self):
        print(
            f"Error: {self.exception_name}: "
            f"{self.exception_message}"
        )

# Регистрация
router.message.register(HelpHandler, Command("help"))
router.message.register(EchoHandler)
router.message_callback.register(ButtonHandler)
router.error.register(GlobalErrorHandler)

dp.include_router(router)
asyncio.run(dp.start_polling(bot))