Example of usage

import logging
from os import getenv
from typing import Annotated

from aiogram import Router, Bot, Dispatcher
from aiogram.filters import CommandStart
from aiogram.types import Message, User
from aiogram3_di import setup_di, Depends

router = Router()


def get_user_full_name(event_from_user: User) -> str:
    return event_from_user.full_name


@router.message(CommandStart())
async def start(
    message: Message, full_name: Annotated[str, Depends(get_user_full_name)]
) -> None:
    await message.answer(f"Hi {full_name}")


def main() -> None:
    logging.basicConfig(level=logging.INFO)

    bot = Bot(token=getenv("BOT_TOKEN"))

    dp = Dispatcher()

    dp.include_router(router)

    setup_di(dp)

    dp.run_polling(bot)


if __name__ == "__main__":
    main()

Handler Dependencies.

You can use Depends in the flags parameter of the handler, for example:

flags={"dependencies": [Depends(verify_user)]}

Details

It is inspired by FastAPI.

If you define a normal def, your function will be called in a different thread.

License

MIT