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MSC4123: Allow knock -> join transition #4123

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MSC4123: Allow knock -> join transition #4123

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Kladki
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@Kladki Kladki commented Apr 6, 2024

@Kladki
Proposal to allow knock -> join transition
1100a26 
Signed-off-by: Matthias Ahouansou <matthias@ahouansou.cz>
@tulir tulir added requires-room-version An idea which will require a bump in room version proposal A matrix spec change proposal unassigned-room-version Remove this label when things get versioned. kind:maintenance MSC which clarifies/updates existing spec needs-implementation This MSC does not have a qualifying implementation for the SCT to review. The MSC cannot enter FCP. labels Apr 6, 2024
tulir
tulir reviewed Apr 7, 2024
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proposals/4123-knock-join-transition.md
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@zecakeh pointed out that these transitions are already allowed according to the auth rules

As long as the user isn't banned, rule 4.3.6 allows joining if join_rule is public regardless of current membership, and rule 4.3.5.3 does the same for restricted rooms if the authorised via user key is valid.

image

So it seems like the table and the graph in the client-server API are just wrong and can be fixed without an MSC

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@tulir tulir Apr 7, 2024 •
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And apparently ¼ of the spec PR already exists: matrix-org/matrix-spec#1709 (missing parts: knock -> join for public rooms in the graph, and updating the table for both cases)

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i have to ask if this has been confirmed to be correct behavior so we arent walking straight into another Knock Invite mess. Like im not taking a stance on if this needs a MSC or not just asking that we make sure we arent walking into another mess of that magnitude.

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Ruma (and hence Conduit) already allowed the knock -> join transition, not sure about Synapse and Dendrite.

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Kladki commented Apr 7, 2024

As per #4123 (comment)

@Kladki Kladki closed this Apr 7, 2024
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Kladki commented Apr 7, 2024 via email

@turt2live turt2live added the obsolete A proposal which has been overtaken by other proposals label Apr 7, 2024
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kind:maintenance MSC which clarifies/updates existing spec needs-implementation This MSC does not have a qualifying implementation for the SCT to review. The MSC cannot enter FCP. obsolete A proposal which has been overtaken by other proposals proposal A matrix spec change proposal requires-room-version An idea which will require a bump in room version unassigned-room-version Remove this label when things get versioned.
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