matrix-react-sdk VS Synapse

There's already an (old pull request)[https://github.com/matrix-org/matrix-react-sdk/pull/9240] out for custom emotes for the element client but is blocked by acceptance of spec and other minor issues with code style.

You are completely misinterpreting my quote, which makes me question whether you are acting in good faith.

Totally agreed that Signal servers cannot just add a device to a group chat.

What I saying was: in any system, you have to verify users for security in general. Having verified users in Matrix, you then get a massive red warning if an unverified device is added to their accounts. Given we have cross-signing (i.e. users are heavily encouraged to verify their own devices when they log in), you can be sure that such unverified devices are malicious and take appropriate action.

The obvious thing we could do is to go one step further (as we used to, until we backed it out in https://github.com/matrix-org/matrix-react-sdk/pull/3837) and stop messages from flowing until the unverified device has been dealt with. Even better would be to make group membership controlled by the clients, so the server can't add devices at all. And we're working on this, as part of shifting the implementations over to the audited matrix-rust-sdk-crypto implementation to avoid having to solve the problem in quadruplicate.

> I would challenge you to get one reputable cryptographer to back what you’re claiming about these vulnerabilities and your proposed fixes.

Hopefully someone will pop up here and confirm that I'm not talking shit :) Failing that, you'll have to wait for the next Least Authority audit - we have another independent public audit queued once this wave of work finishes to address the "To me Matrix isn't secure" polemicists. You can see the previous one (on the crypto layer, rather than the group membership layer) at https://matrix.org/blog/2022/05/16/independent-public-audit-... fwiw.

1. We are about to replace the composer in Element with a sparkly new (optional) wysiwyg editor in the coming weeks: https://github.com/matrix-org/matrix-wysiwyg

2. totally agreed. we are completely reworking the crypto UX; there’s already https://github.com/matrix-org/matrix-react-sdk/pull/8228 asa proof of concept of what’s to come.

3. glad you like Cinny - it’s written by ajbura, whose dayjob is at Element and built the UI for Third Room. Element is not “the official app” - it’s just the one that happens to be written by folks from the Matrix core team. If you prefer Cinny, knock yourself out. Meanwhile we’re frantically improving Element too.

Unlike any open source projects to which I've contributed, this project involves 2 other repos, matrix-react-sdk and matrix-js-sdk. As explained in the Development guide in the element-web repo, I need those 2 SDKs in order to build Element successfully for code contribution.

> Also, you can do toggle mute via hotkey (which we have a draft for at https://github.com/matrix-org/matrix-react-sdk/pull/2280), but this is surely a bonus feature.

Proper Push-To-Talk with global hotkey is one of those features that doesn't seem important but when you need it (organizing Raids in games, big meetings, etc) it makes a world of difference. That and lack of click to join voice rooms is definitely making it harder to move gaming groups over.

Encryption is now enabled by default for 1:1 chats. There's an MR for adding GIF support but looks like they are not interested in it.

This is a really common failure mode - people forget to explicitly assert that the other modifiers are off when checking for a modifier being on. I had to go through and fix all the ones in matrix-react-sdk (element web) a few years ago: https://github.com/matrix-org/matrix-react-sdk/pull/825/file...

Exposing the desktopCapturer to the render process and then using it inside the web app

What are you thinking of here? Synapse has supported purging room history since 2016: https://github.com/matrix-org/synapse/pull/911, and configurable data retention since 2019: https://github.com/matrix-org/synapse/pull/5815.

Meanwhile, Matrix has never needed the full room history to be synchronised - when a server joins a room, it typically only grabs the last 20 messages. (It does needs to grab all the key-value state about the room, although these days that happens gradually in the background).

If you're wondering why Matrix implementations are often greedy on disk space, it's because they typically cache the key-value state aggressively (storing a snapshot of it for the room on a regular basis). However, that's just an implementation quirk; folks could absolutely come up with fancier datastructures to store it more efficiently; it's just not got to the top of anyone's todo list yet - things like performance and UX are considered much more important than disk usage right now.

some context re the Matrix isses, long history apparently: https://github.com/matrix-org/synapse/issues/14481#issuecomm...

Why not Matrix? Here's one reason: it has incredibly hard-to-debug edge cases, and plenty of bugs. One of my favourites is the one where people are kicked out of your room at random, which was reported a year ago[0]. It wasn't fixed, however, because the head of the Matrix foundation (Matthew) presumably didn't like the issue being posted on Twitter.

This is honestly really disappointing behaviour from a platform owner.

[0]: https://github.com/matrix-org/synapse/issues/14481

> That doesn't make this situation any less bad to the rest of the community.

How is the community suffering here? Let's say Element adds a bunch of baller stuff to their versions over the next few months and then closes the source. Can't the community just fork the last AGPL version? You might say, "well then no one can take the AGPL fork and make their own closed-source business", but do you want them to? Even if you do, they still can with the existing Apache-licensed version, just like Element is doing right now.

You're arguing that Element will lose a lot of contributions, but TFA points out that despite being super open, the vast majority of contributions are still made by Element employees (which seems to be true [0]). It's not the case that Element is looking to monetize the (small) contributions of others, it is the case that others are looking to monetize the (huge) contributions of Element.

And besides, aren't the MSCs the core of Matrix? It's already super possible to build your own compliant client and server.

The situation is that Element needs money to keep developing the ecosystem. It would be cool if there were a big network of donors and contributions, but there isn't. You're essentially saying, "that's fine, go out of business then, and the community will keep developing the ecosystem", but that's not happening now, and it can still happen anyway with the Apache-licensed versions, which again people can still contribute to.

[0]: https://github.com/matrix-org/synapse/graphs/contributors