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# Pyrogram - Telegram MTProto API Client Library for Python

# Copyright (C) 2017-present Dan <https://github.com/delivrance>

#

# This file is part of Pyrogram.

#

# Pyrogram is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published

# by the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# Pyrogram is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Lesser General Public License for more details.

#

# You should have received a copy of the GNU Lesser General Public License

# along with Pyrogram. If not, see <http://www.gnu.org/licenses/>.

import logging

import pyrogram

from pyrogram import raw

from pyrogram import types

from pyrogram.errors import UserMigrate

from pyrogram.session import Session, Auth

log = logging.getLogger(__name__)

class SignInBot:

async def sign_in_bot(

self: "pyrogram.Client",

bot_token: str

) -> "types.User":

"""Authorize a bot using its bot token generated by BotFather.

.. include:: /_includes/usable-by/bots.rst

Parameters:

bot_token (``str``):

The bot token generated by BotFather

Returns:

:obj:`~pyrogram.types.User`: On success, the bot identity is return in form of a user object.

Raises:

BadRequest: In case the bot token is invalid.

"""

while True:

try:

r = await self.invoke(

raw.functions.auth.ImportBotAuthorization(

flags=0,

api_id=self.api_id,

api_hash=self.api_hash,

bot_auth_token=bot_token

)

)

except UserMigrate as e:

await self.session.stop()

await self.storage.dc_id(e.value)

await self.storage.auth_key(

await Auth(

self, await self.storage.dc_id(),

await self.storage.test_mode()

).create()

)

self.session = Session(

self, await self.storage.dc_id(),

await self.storage.auth_key(), await self.storage.test_mode()

)

await self.session.start()

else:

await self.storage.user_id(r.user.id)

await self.storage.is_bot(True)

return types.User._parse(self, r.user)