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this post was submitted on 09 Jul 2023
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No Stupid Questions
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No such thing. Ask away!
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There is no such thing as a local matrix channel. Just one which is set to not allow off-instance accounts access.
The reason the domain has to be appended to everything in federated systems, is that its the only way to make sure you don't get name collision when federating. So that when servers talk to each other about stuff, everything has a unique identifier.
You can have dibs on your domain. You cannot have dibs on just random data labels. But if you do random label+domain, you can be sure no-one else on any other server can use that exact same id.
Also I do know.
I've attempted the changing of a matrix server's domain, without a database purge. It was a waste of time, the instance was only a day old anyway, so I just started over in the end.
That seems somewhat silly.
With email servers, local messages are passed without the domain. Same with HTML. It’s only when “federating” to other servers that a domain is required. I can’t really see why ActivityPub would be any different in what it requires.
If Matrix is requiring the domain, that’s likely to do with encryption and validation, which has always been an issue with Internet 1.0 services. But it seems to me it should still be possible, just not done with current server implementations.
You mean local matrix channels don't exist in storage schema, right? Not that they don't exist or make sense conceptually?
Because a channel is always hosted on one owning instance.
Yes.