node-red-contrib-matrix-chat-jw

Matrix chat server client for Node-RED

Features

The following is supported from this package:

• End-to-end encryption
  • Currently a WIP
• Receive events from a room (messages, reactions, images, audio, locations, and files) whether encrypted or not
• Send Images/Files (sending files to e2ee room doesn't currently encrypt them yet)
• Edit messages
• Delete events (messages, reactions, etc)
• Decrypt files in e2ee rooms
• Send HTML/Plain Text Message/Notice
• React to messages
• Register user's on closed registration Synapse servers using registration_shared_secret (Admin Only)
• List out users on a Synapse server (Admin Only)
• Get WhoIs info for a Synapse user (Admin Only)
• Add/Edit Synapse users using the v2 API (requires a pre-existing admin account)
• Deactivate users on Synapse servers (Admin Only)
• Get a user list from a room
• Kick user from room
• Ban user from room
• Join, Create, Invite, and Leave rooms
• Synapse admin API to force add user to room (requires bot to be in same room already)

Therefore, you can easily build a bot, chat relay, or administrate your Matrix server from within Node-RED.

Installing

You can either install from within Node-RED by searching for node-red-contrib-matrix-chat or run this from within your Node-RED directory:

npm install node-red-contrib-matrix-chat-jw

Extra functionality

You are not limited by just the nodes we have created. If you turn on global access when setting up your Matrix Client you can access the client directly from any function node to write your own logic.

End-to-End Encryption Notes

Currently, this module has no way of getting encryption keys from other devices on the same account. Therefore it is recommended you use the bot exclusively with Node-RED after it's creation. Failure to do so will lead to your bot being unable to receive messages from e2ee rooms it joined from another client. Shared secret registration makes this super easy since it returns a token and device ID.

This module stores a folder in your Node-RED directory called matrix-client-storage and is it vital that you periodically back this up if you are using e2ee. This is where the client stores all the keys necessary to decrypt messages and if lost you will lose access to e2e rooms. If you move your client to another NR install make sure to migrate this folder as well (and do not let both the old and new client run at same time).

Want to contribute? Any help on getting the last pieces of e2ee figured out would be greatly appreciated :)

Generate user

You will need a user to use this module. Luckily this module comes with a node that allows you to register users to a homeserver using the secret registration endpoint. This is perfect because it returns an access_token as well as a device_id which is exactly what we need.