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Switch to chunk events so we can auth via power_levels (MSC2716) (#10432)

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Previously, we were using `content.chunk_id` to connect one
chunk to another. But these events can be from any `sender`
and we can't tell who should be able to send historical events.
We know we only want the application service to do it but these
events have the sender of a real historical message, not the
application service user ID as the sender. Other federated homeservers
also have no indicator which senders are an application service on
the originating homeserver.

So we want to auth all of the MSC2716 events via power_levels
and have them be sent by the application service with proper
PL levels in the room.
This commit is contained in:
Eric Eastwood 2021-07-21 05:29:57 -05:00 • committed by GitHub
parent b181dc402d
commit 2d89c66b88
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3 changed files with 18 additions and 6 deletions
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6
synapse/api/constants.py
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@ -120,6 +120,7 @@ class EventTypes:
SpaceParent = "m.space.parent"
MSC2716_INSERTION = "org.matrix.msc2716.insertion"
MSC2716_CHUNK = "org.matrix.msc2716.chunk"
MSC2716_MARKER = "org.matrix.msc2716.marker"
@ -190,9 +191,10 @@ class EventContentFields:
# Used on normal messages to indicate they were historically imported after the fact
MSC2716_HISTORICAL = "org.matrix.msc2716.historical"
# For "insertion" events
# For "insertion" events to indicate what the next chunk ID should be in
# order to connect to it
MSC2716_NEXT_CHUNK_ID = "org.matrix.msc2716.next_chunk_id"
# Used on normal message events to indicate where the chunk connects to
# Used on "chunk" events to indicate which insertion event it connects to
MSC2716_CHUNK_ID = "org.matrix.msc2716.chunk_id"
# For "marker" events
MSC2716_MARKER_INSERTION = "org.matrix.msc2716.marker.insertion"