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Obtaining chat_id having chat link in Telegram API

I am using Telegram API to develop a program to join Telegram groups or channel by their links.

Methods that join group or channel (e.g. channels.joinChannel) need chat_id or channel_id, but I have only the links of the groups or channels (e.g. @channel_username or https://t.me/channel_username or https://t.me/joinChat/xxxxx)

How can I obtain chat_id or channel_id of a group or channel having its link?

P.S: I’m not the admin of these groups or channels.

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2

Answers


  1. Chosen as BEST ANSWER
    0

    I found the answer:

    First we must use checkChatInvite method. It uses the chat link as input parameter and outputs the chat specifications includes chat_id.

    Then we use joinChat method method. it uses the chat_id got from the previous step and joins to that group or channel.


  2. 0

    Selected answer seems to be outdated. In recent versions there is checkChatInviteLink call, but it requires the chat url to start with https://t.me/joinchat/

    If you want to resolve a link like https://t.me/chatname, you can use searchPublicChat API call.

    This works for me (using https://github.com/alexander-akhmetov/python-telegram):

    def resolve_channel_link(tg, link):
    if link.startswith('https://t.me/'):
        link = link.split('/')[-1]
    else:
        raise RuntimeError('cant parse link', link)

    r = tg.call_method('searchPublicChat', [{'username', link}])
    r.wait()

    if r.error:
        raise RuntimeError(r.error_info)
    assert(r.update['@type'] == 'chat')
    return r.update['id']
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