This room version builds on version 3 using a different encoding for event IDs. Client considerations This room version changes the format form event IDs sent to clients. Clients should already be treating event IDs as opaque identifiers, and should not be concerned with the format of them. Clients should still encode the event ID when including it in a request path. Clients should expect to see event IDs changed from the format of $randomstring:example.org to something like $Rqnc-F-dvnEYJTyH...
