/room/${roomID}/messages requires "from" parameter, but should it?

[Half-Shot]

https://matrix.org/docs/spec/client_server/r0.4.0.html#get-matrix-client-r0-rooms-roomid-messages

Synapse doesn't require the from parameter and functions well enough without it. I believe omitting from will get you the last N events in the room. This is useful for bridges/bots who wish to get messages they may have missed after being invited, who otherwise may have no existing token to use for from.

Can we drop this requirement and spec that a lack of from will pull the last N messages from the room?

[timokoesters]

Currently chat backups don't work on Conduit because of this bug. Either chat backups should set the from value or this should be changed in the spec soon.

[clokep]

MSC3567 makes it optional.

[turt2live]

Closing as fixed.