How can I find out if the admin sent a message or not?

Question

Python

Hey!
How to find out the user with what role sent a message to the chat?
I have a bot in the chat, but in the incoming event there is no sign of an admin or not.
I tried this, it's strange, it works, then it gives an error:

@bot.on(events.NewMessage())
async def delurls(event):
    if findurl(event.message.text):
        participant = await bot(GetParticipantRequest(channel=event.original_update.message.to_id.channel_id,participant=event.original_update.message.from_id))
        isadmin = (type(participant.participant) == ChannelParticipantAdmin)
        iscreator = (type(participant.participant) == ChannelParticipantCreator)
        if isadmin or iscreator:
            pass
        else:
            await bot.delete_messages(event.chat, event.message)

2021-07-20 02:06:57,649 [ERROR] telethon.client.updates - _dispatch_update:470 - Unhandled exception on delurls
Traceback (most recent call last):
  File "/home/bot/fnkbot/lib/python3.7/site-packages/telethon/client/updates.py", line 454, in _dispatch_update
    await callback(event)
  File "/home/bot/fnkbot/FNKBot.py", line 43, in delurls
    participant = await bot(GetParticipantRequest(channel=event.original_update.message.to_id.channel_id,participant=event.original_update.message.from_id))
  File "/home/bot/fnkbot/lib/python3.7/site-packages/telethon/client/users.py", line 30, in __call__
    return await self._call(self._sender, request, ordered=ordered)
  File "/home/bot/fnkbot/lib/python3.7/site-packages/telethon/client/users.py", line 37, in _call
    await r.resolve(self, utils)
  File "/home/bot/fnkbot/lib/python3.7/site-packages/telethon/tl/functions/channels.py", line 865, in resolve
    self.participant = utils.get_input_peer(await client.get_input_entity(self.participant))
  File "/home/bot/fnkbot/lib/python3.7/site-packages/telethon/client/users.py", line 438, in get_input_entity
    peer = utils.get_peer(peer)
  File "/home/bot/fnkbot/lib/python3.7/site-packages/telethon/utils.py", line 993, in get_peer
    _raise_cast_fail(peer, 'Peer')
  File "/home/bot/fnkbot/lib/python3.7/site-packages/telethon/utils.py", line 139, in _raise_cast_fail
    type(entity).__name__, target))
TypeError: Cannot cast NoneType to any kind of Peer.

Answer 1

As an alternative solution, I can suggest making an entry in the config / db / pr. id of certain roles and then, when processing the command, compare the sender's id with the saved id.