MatrixJoinLink @ TWIM

Originally posted on TWIM.

MatrixJoinLink is bot that allows the creation of invite links to non-public rooms in matrix. It uses the Trixnity framework. The bot is currently in early alpha and primarily used as proof-of-concept. In addition, I currently gather feedback regarding the concept.

Reason for this Bot

I always struggled with the problem that I have private rooms, I want to share with a group of friends. Before the bot, I had to invite all the people. Now I can invite JoinLink and create an invite link. This link can be shared to my friends who want to join my room (including spaces).

Technical Details / How it works

1. Let’s assume that you want to share the private room !private:room.domain
2. After you’ve invited the bot, you can enter !join link IShareLinksWithYou
3. The bot creates a new public room that contains “IShareLinksWithYou” in its name. The room will not be listed in the room directory; for this example its ID is !public:room.domain
4. If somebody joins the public room, the bot verifies whether the rooms belong to each other based on two encrypted state events in !private:room.domain and !public:room.domain. If the validation is successful, the bot invites the user to the private room.
5. If you want to disable the share simply type !join unlink in the private room. This will invalidate the link.