text: #  Pyrogram - Telegram MTProto API Client Library for Python
  #  Copyright (C) 2017-2020 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/>.
  
  from typing import Union
  
  from pyrogram import raw
  from pyrogram.scaffold import Scaffold
  
  
  class DeleteUserHistory(Scaffold):
      async def delete_user_history(
          self,
          chat_id: Union[int, str],
          user_id: Union[int, str],
      ) -> bool:
          """Delete all messages sent by a certain user in a supergroup.
  
          Parameters:
              chat_id (``int`` | ``str``):
                  Unique identifier (int) or username (str) of the target chat.
  
              user_id (``int`` | ``str``):
                  Unique identifier (int) or username (str) of the user whose messages will be deleted.
  
          Returns:
              ``bool``: True on success, False otherwise.
          """
  
          r = await self.send(
              raw.functions.channels.DeleteUserHistory(
                  channel=await self.resolve_peer(chat_id),
                  user_id=await self.resolve_peer(user_id)
              )
          )
  
          # Deleting messages you don't have right onto won't raise any error.
          # Check for pts_count, which is 0 in case deletes fail.
          return bool(r.pts_count)
  