chatInviteLinkInfo.type.supergroup_id = 0

[wowka1319]

I know checkChatInviteLink can return chatInviteLinkInfo with chat_id=0. But I also observe checkChatInviteLink.type as chatTypeSupergroup with supergroup_id=0. I cannot find this in docs for chatTypeSupergroup. Is this error?

[levlam]

The behavior is the same as for the chat_id field, i.e. the identifier isn't known if the user has no access to the chat before joining. I will explicitly mention this in the documentation.

[wowka1319]

1. Is 0 invalid id for every type (supergroup, basic_group, user, message_id, ...)? If true it would be good to see that in docs.
2. Is there way to detect when two invite links point to the same supergroup without joining? I mean the links that work via request only.
3. Can the invite link point to another supergroup after a while like usernames?

[levlam]

1. Yes, but you can't receive 0 as the identifier usually, and if you can, then this is documented and documented, what exactly it means for the field.
2. No.
3. No.