Commit graph

175 commits

Author SHA1 Message Date
S7evinK
49dc49b232
Remove eduserver (#2306)
* Move receipt sending to own JetStream producer

* Move SendToDevice to producer

* Remove most parts of the EDU server

* Fix SendToDevice & copyrights

* Move structs, cleanup EDU Server traces

* Use HeadersOnly subscription

* Missing file

* Fix linter issues

* Move consumers to own files

* Rename durable consumer; Consumer cleanup

* Docs/config cleanup
2022-03-29 14:14:35 +02:00
Neil Alexander
5106cc807c
Ensure only one transaction is used for RS input per room (#2178)
* Ensure the input API only uses a single transaction

* Remove more of the dead query API call

* Tidy up

* Fix tests hopefully

* Don't do unnecessary work for rooms that don't exist

* Improve error, fix another case where transaction wasn't used properly

* Add a unit test for checking single transaction on RS input API

* Fix logic oops when deciding whether to use a transaction in storeEvent
2022-02-11 17:40:14 +00:00
Neil Alexander
88b45d5cd2
Drop m.room.create events in federation /send transaction (#2179) 2022-02-11 15:18:14 +00:00
kegsay
aa5c3b88de
Unmarshal events at the Dendrite level not GMSL level (#2164)
* Use new event json types in gmsl

* Fix EventJSON to actually unmarshal events

* Update GMSL

* Bump GMSL and improve error messages

* Send back the correct RespState

* Update GMSL
2022-02-09 20:31:24 +00:00
S7evinK
2771d93748
Remove OutputKeyChangeEvent consumer on keyserver (#2160)
* Remove keyserver consumer

* Remove keyserver from eduserver

* Directly upload device keys without eduserver

* Add passing tests
2022-02-08 18:13:38 +01:00
Neil Alexander
ba1a9b98b7
Tweak some logging (#2130)
* Modify some log levels

* Update gomatrixserverlib to matrix-org/gomatrixserverlib@336334f

* Update gomatrixserverlib to matrix-org/gomatrixserverlib@cde7ac8

* Demote warning about key change producer

* Add more useful roomserver logging

* Further tweaking
2022-01-31 10:48:28 +00:00
Neil Alexander
a763cbb0e1
Roomserver/federation input refactor (#2104)
* Put federation client functions into their own file

* Look for missing auth events in RS input

* Remove retrieveMissingAuthEvents from federation API

* Logging

* Sorta transplanted the code over

* Use event origin failing all else

* Don't get stuck on mutexes:

* Add verifier

* Don't mark state events with zero snapshot NID as not existing

* Check missing state if not an outlier before storing the event

* Reject instead of soft-fail, don't copy roominfo so much

* Use synchronous contexts, limit time to fetch missing events

* Clean up some commented out bits

* Simplify `/send` endpoint significantly

* Submit async

* Report errors on sending to RS input

* Set max payload in NATS to 16MB

* Tweak metrics

* Add `workerForRoom` for tidiness

* Try skipping unmarshalling errors for RespMissingEvents

* Track missing prev events separately to avoid calculating state when not possible

* Tweak logic around checking missing state

* Care about state when checking missing prev events

* Don't check missing state for create events

* Try that again

* Handle create events better

* Send create room events as new

* Use given event kind when sending auth/state events

* Revert "Use given event kind when sending auth/state events"

This reverts commit 089d64d271.

* Only search for missing prev events or state for new events

* Tweaks

* We only have missing prev if we don't supply state

* Room version tweaks

* Allow async inputs again

* Apply backpressure to consumers/synchronous requests to hopefully stop things being overwhelmed

* Set timeouts on roomserver input tasks (need to decide what timeout makes sense)

* Use work queue policy, deliver all on restart

* Reduce chance of duplicates being sent by NATS

* Limit the number of servers we attempt to reduce backpressure

* Some review comment fixes

* Tidy up a couple things

* Don't limit servers, randomise order using map

* Some context refactoring

* Update gmsl

* Don't resend create events

* Set stateIDs length correctly or else the roomserver thinks there are missing events when there aren't

* Exclude our own servername

* Try backing off servers

* Make excluding self behaviour optional

* Exclude self from g_m_e

* Update sytest-whitelist

* Update consumers for the roomserver output stream

* Remember to send outliers for state returned from /gme

* Make full HTTP tests less upsetti

* Remove 'If a device list update goes missing, the server resyncs on the next one' from the sytest blacklist

* Remove debugging test

* Fix blacklist again, remove unnecessary duplicate context

* Clearer contexts, don't use background in case there's something happening there

* Don't queue up events more than once in memory

* Correctly identify create events when checking for state

* Fill in gaps again in /gme code

* Remove `AuthEventIDs` from `InputRoomEvent`

* Remove stray field

Co-authored-by: Kegan Dougal <kegan@matrix.org>
2022-01-27 14:29:14 +00:00
kegsay
173b1e8d3e
Fix #2084 - incorrect /event_auth response (#2085)
* Fix #2084

* Return early

* Linting
2022-01-06 17:13:34 +00:00
S7evinK
161f145176
Add NATS JetStream support (#1866)
* Add NATS JetStream support
Update shopify/sarama

* Fix addresses

* Don't change Addresses in Defaults

* Update saramajetstream

* Add missing error check

Keep typing events for at least one minute

* Use all configured NATS addresses

* Update saramajetstream

* Try setting up with NATS

* Make sure NATS uses own persistent directory (TODO: make this configurable)

* Update go.mod/go.sum

* Jetstream package

* Various other refactoring

* Build fixes

* Config tweaks, make random jetstream storage path for CI

* Disable interest policies

* Try to sane default on jetstream base path

* Try to use in-memory for CI

* Restore storage/retention

* Update nats.go dependency

* Adapt changes to config

* Remove unneeded TopicFor

* Dep update

* Revert "Remove unneeded TopicFor"

This reverts commit f5a4e4a339.

* Revert changes made to streams

* Fix build problems

* Update nats-server

* Update go.mod/go.sum

* Roomserver input API queuing using NATS

* Fix topic naming

* Prometheus metrics

* More refactoring to remove saramajetstream

* Add missing topic

* Don't try to populate map that doesn't exist

* Roomserver output topic

* Update go.mod/go.sum

* Message acknowledgements

* Ack tweaks

* Try to resume transaction re-sends

* Try to resume transaction re-sends

* Update to matrix-org/gomatrixserverlib@91dadfb

* Remove internal.PartitionStorer from components that don't consume keychanges

* Try to reduce re-allocations a bit in resolveConflictsV2

* Tweak delivery options on RS input

* Publish send-to-device messages into correct JetStream subject

* Async and sync roomserver input

* Update dendrite-config.yaml

* Remove roomserver tests for now (they need rewriting)

* Remove roomserver test again (was merged back in)

* Update documentation

* Docker updates

* More Docker updates

* Update Docker readme again

* Fix lint issues

* Send final event in `processEvent` synchronously (since this might stop Sytest from being so upset)

* Don't report event rejection errors via `/send`, since apparently this is upsetting tests that don't expect that

* Go 1.16 instead of Go 1.13 for upgrade tests and Complement

* Revert "Don't report event rejection errors via `/send`, since apparently this is upsetting tests that don't expect that"

This reverts commit 368675283f.

* Don't report any errors on `/send` to see what fun that creates

* Fix panics on closed channel sends

* Enforce state key matches sender

* Do the same for leave

* Various tweaks to make tests happier

Squashed commit of the following:

commit 13f9028e7a
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 15:47:14 2022 +0000

    Do the same for leave

commit e6be7f05c3
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 15:33:42 2022 +0000

    Enforce state key matches sender

commit 85ede6d64b
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 14:07:04 2022 +0000

    Fix panics on closed channel sends

commit 9755494a98
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 13:38:22 2022 +0000

    Don't report any errors on `/send` to see what fun that creates

commit 3bb4f87b5d
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 13:00:26 2022 +0000

    Revert "Don't report event rejection errors via `/send`, since apparently this is upsetting tests that don't expect that"

    This reverts commit 368675283f.

commit fe2673ed7b
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 12:09:34 2022 +0000

    Go 1.16 instead of Go 1.13 for upgrade tests and Complement

commit 368675283f
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 11:51:45 2022 +0000

    Don't report event rejection errors via `/send`, since apparently this is upsetting tests that don't expect that

commit b028dfc085
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Tue Jan 4 10:29:08 2022 +0000

    Send final event in `processEvent` synchronously (since this might stop Sytest from being so upset)

* Merge in NATS Server v2.6.6 and nats.go v1.13 into the in-process connection fork

* Add `jetstream.WithJetStreamMessage` to make ack/nak-ing less messy, use process context in consumers

* Fix consumer component name in  federation API

* Add comment explaining where streams are defined

* Tweaks to roomserver input with comments

* Finish that sentence that I apparently forgot to finish in INSTALL.md

* Bump version number of config to 2

* Add comments around asynchronous sends to roomserver in processEventWithMissingState

* More useful error message when the config version does not match

* Set version in generate-config

* Fix version in config.Defaults

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
2022-01-05 17:44:49 +00:00
Neil Alexander
ec716793eb
Merge federationapi, federationsender, signingkeyserver components (#2055)
* Initial federation sender -> federation API refactoring

* Move base into own package, avoids import cycle

* Fix build errors

* Fix tests

* Add signing key server tables

* Try to fold signing key server into federation API

* Fix dendritejs builds

* Update embedded interfaces

* Fix panic, fix lint error

* Update configs, docker

* Rename some things

* Reuse same keyring on the implementing side

* Fix federation tests, `NewBaseDendrite` can accept freeform options

* Fix build

* Update create_db, configs

* Name tables back

* Don't rename federationsender consumer for now
2021-11-24 10:45:23 +00:00
Neil Alexander
323a6fb54f
Resume federation sends (#2039)
* Resume federation sends

* Review comments

* Fix build error
2021-11-08 09:24:16 +00:00
Neil Alexander
fbd1a0ab13
Update to matrix-org/gomatrixserverlib@5e02b64 2021-11-02 10:13:38 +00:00
Ryan W
1cd4d50181
Added .well-known/matrix/server endpoint (#1988)
* Added .well-known/matrix/server endpoint

Signed-off-by: Ryan Whittington <twentybitdev@gmail.com>

* Replaced tabs with spaces

Signed-off-by: Ryan Whittington <twentybitdev@gmail.com>
2021-09-10 10:05:31 +01:00
Ryan W
a624eab309
- Removed double imports (#1989)
- Lower cased error messages

Signed-off-by: Ryan Whittington <twentybitdev@gmail.com>

Co-authored-by: kegsay <kegan@matrix.org>
2021-09-08 17:31:03 +01:00
kegsay
7dc8fb1fe7
Add more logs (#2005)
* Add more logs

To help debug the migration issue in #1924 along with manual data-loss-inducing fixes.
Also log the origin server on processed txns to help debug buggy server origins.

* Fix query
2021-09-07 15:07:14 +01:00
Neil Alexander
51b119107c
Don't return nonsense canonical room aliases in the public rooms responses (#1992) 2021-08-27 16:50:30 +01:00
Neil Alexander
2dd5fd1fd6
publicRooms should accept POST as well as GET (#1991) 2021-08-27 15:48:27 +01:00
Neil Alexander
ff21675c5b
Cross-signing fixes, notifications via sync, federation (#1974)
* Initial work on signing key update EDUs

* Fix build

* Produce/consume EDUs

* Producer logging

* Only produce key change notifications for local users

* Better naming

* Try to notify sync

* Enable feature

* Use key change topic

* Don't bother verifying signatures, validate key lengths if we can, notifier fixes

* Copyright notices

* Remove tests from whitelist until matrix-org/sytest#1117

* Some review comment fixes

* Update to matrix-org/gomatrixserverlib@f9416ac

* Remove unneeded parameter
2021-08-17 13:44:30 +01:00
Neil Alexander
b1377d991a
Cross-signing signature handling (#1965)
* Handle other signatures

* Decorate key ID properly

* Match by key IDs

* Tweaks

* Fixes

* Fix /user/keys/query bug, review comments, update sytest-whitelist

* Various wtweaks

* Fix wiring for keyserver in API mode

* Additional fixes
2021-08-09 14:35:24 +01:00
Neil Alexander
e95b1fd238
Cross-signing validation for self-sigs, expose signatures over /user/keys/query and /user/devices/{userId} (#1962)
* Enable unstable feature again

* Try to verify when a device signs a key

* Try to verify when a key signs a device

* It's the self-signing key, not the master key

* Fix error

* Try to verify master key uploads

* Actually we can't guarantee we can do that so nevermind

* Add signatures into /devices/list request

* Fix nil pointer

* Reprioritise map creation

* Don't skip devices that don't have signatures

* Add some debug logging

* Fix logic error in QuerySignatures

* Fix bugs

* Expose master and self-signing keys on /devices/list hopefully

* maps are tedious

* Expose signatures via /keys/query

* Upload signatures when uploading keys

* Fixes

* Disable the feature again
2021-08-06 10:13:35 +01:00
kegsay
e3df612953
Add tracing to user API (#1948)
Use the trace version in tests so we can just implement the required API functions.
2021-08-03 11:23:25 +01:00
Meenal Trivedi
fa1ec482a7
fix:Inviting to an unsupported room version return M_BAD_JSON instead of Incompatible_Version (#1930)
* fix:Inviting to an unsupported room version return M_BAD_JSON instead of M_UNSUPPORTED_ROOM_VERSION

Signed-off-by: Meenal Trivedi <meenaltrivedi6102@gmail.com>

* fix

Signed-off-by: Meenal Trivedi <meenaltrivedi6102@gmail.com>

* fix

Signed-off-by: Meenal Trivedi <meenaltrivedi6102@gmail.com>

* feat: make requested changes

Signed-off-by: Meenal Trivedi <meenaltrivedi6102@gmail.com>

* Use error typecast from matrix-org/gomatrixserverlib#272

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
2021-07-26 10:41:58 +01:00
kegsay
af64e648d7
Fix failing Complement tests (#1931)
* Check for missing state keys to avoid panicking

* Check for not allowed errors on send_leave

* More logging

* handle send_join errors too

* Additional send_join checks

* s/join/gmsl.json/
2021-07-19 13:15:19 +01:00
kegsay
728061db03
fedsender: try to satisfy all notary key requests from the cache first (#1925)
* fedsender: try to satisfy all notary key requests from the cache first

* Linting
2021-07-16 11:35:42 +01:00
kegsay
c102adaf43
fedsender: add cache tables for notary keys (#1923)
* Add notary server tables for postgres

* Add sqlite tables

* fedsender: GetServerKeys -> QueryServerKeys

As it now checks a cache and can return multiple responses
2021-07-15 17:45:37 +01:00
kegsay
7df3e691f2
Fix failing complement test (#1917)
Specifically `TestBannedUserCannotSendJoin`
2021-07-13 12:22:27 +01:00
Neil Alexander
c8408a6387
Add more optimised code path for checking if we're in a room (#1909)
* Add more optimised code path for checking if we're in a room

* Fix database queries

* Fix federation API test

* Fix logging

* Review comments

* Make separate API call for room membership
2021-07-09 16:36:45 +01:00
Neil Alexander
f2974721d5
Fix concurrent map reads/writes on t.hadEvents (#1902)
* Fix concurrent map reads/writes on t.hadEvents

* Add hadEvent function
2021-07-07 18:55:44 +01:00
Neil Alexander
bcd3ef38d0
Track expiry rate on pduCountTotal 2021-07-05 13:47:37 +01:00
Neil Alexander
99d8e1c107
Federation API fixes (#1899)
* Ensure worker has work before starting goroutine

* Revert "Remove processEventWithMissingStateMutex"

This reverts commit 7f02eab47d.

* Use request context when processing transactions

* Keep goroutine count down by not starting work for things where the caller gave up

* Remove mutex, start workers at correct time
2021-07-05 12:14:31 +01:00
Neil Alexander
7f02eab47d
Remove processEventWithMissingStateMutex 2021-07-05 09:14:24 +01:00
Neil Alexander
57320897cb
Federation API workers for /send to reduce memory usage (#1897)
* Try to process rooms concurrently in FS /send

* Clean up

* Use request context so that dead things don't linger for so long

* Remove mutex

* Free up pdus slice so only references remaining are in channel

* Revert "Remove mutex"

This reverts commit 8558075e8c.

* Process EDUs in parallel

* Try refactoring /send concurrency

* Fix waitgroup

* Release on waitgroup

* Respond to transaction

* Reduce CPU usage, fix unit tests

* Tweaks

* Move into one file
2021-07-02 12:33:27 +01:00
Neil Alexander
2647f6e9c5
Fix concurrent map read/write on haveEvents (#1893) 2021-06-30 12:32:20 +01:00
Neil Alexander
b7a2d369c0
Change how servers are selected for missing auth/prev events (#1892)
* Change how servers are selected for missing auth/prev events

* Shuffle order

* Move ServersInRoomProvider into api package
2021-06-30 12:05:58 +01:00
Neil Alexander
0e69212206
Give up on loops when the context expires (#1891) 2021-06-30 10:39:47 +01:00
Neil Alexander
3afb161352
Reduce memory usage in federation /send endpoint (#1890)
* More aggressive event caching

* Deduplicate /state results

* Deduplicate more

* Ensure we use the correct list of events when excluding repeated state

* Fixes

* Ensure we track all events we already knew about properly
2021-06-30 10:01:56 +01:00
Neil Alexander
e2b6a90d90
Put gmectx back to 5 minutes 2021-06-29 10:22:26 +01:00
Neil Alexander
f645646ca9
Restore the getServers RS query (needs optimisation) 2021-06-29 09:37:28 +01:00
Neil Alexander
4417f24678
Protect processEventWithMissingState with per-room mutex, to prevent mass CPU burn/RAM usage
Squashed commit of the following:

commit 7fad77c10e
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 15:06:52 2021 +0100

    Fix processEventWithMissingStateMutexes

commit 138cddcac7
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 13:59:44 2021 +0100

    Use internal.MutexByRoom

commit 6e6f026cfa
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 13:50:18 2021 +0100

    Try to slow things down per room

commit b97d406dff
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 13:41:27 2021 +0100

    Try to slow things down

commit 8866120ebf
Merge: 9f2de8a2 4a37b19a
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 13:40:33 2021 +0100

    Merge branch 'neilalexander/rsinputfifo' into neilalexander/rsinputfifo2

commit 4a37b19a8f
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 13:34:54 2021 +0100

    Add comments

commit f9ab3f4b81
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 13:31:21 2021 +0100

    Tweaks

commit 9f2de8a29c
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 13:15:59 2021 +0100

    Ask origin only for missing things for now

commit 8fd878c75a
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 11:18:11 2021 +0100

    Make sure someone wakes up

commit b63f699f1b
Author: Neil Alexander <neilalexander@users.noreply.github.com>
Date:   Mon Jun 28 11:12:58 2021 +0100

    Use a FIFO queue instead of a channel to reduce backpressure
2021-06-28 15:11:59 +01:00
Neil Alexander
080ae6a829
Move room mutex in federation API (#1830)
* Move room mutex in federation API to surround resolveStatesAndCheck

* Guard processEventWithMissingState instead

* Revert "Guard processEventWithMissingState instead"

This reverts commit 0ce88036aa79b0ce97e967afb70fe932a547d5f0.
2021-04-13 11:13:07 +01:00
Kegsay
b769d5a25e
Optimise memory usage when calling /g_m_e (#1819)
* Optimise memory usage when calling /g_m_e

* cache more events

* refactor handling of device list update pokes

* Sigh
2021-04-08 13:50:39 +01:00
Bruce MacDonald
d27607af78
Implement OpenID module (#599) (#1812)
* Implement OpenID module (#599)

- Unrelated: change Riot references to Element in client API routing

Signed-off-by: Bruce MacDonald <contact@bruce-macdonald.com>

* OpenID module tweaks (#599)

- specify expiry is ms rather than vague ts
- add OpenID token lifetime to configuration
- use Go naming conventions for the path params
- store plaintext token rather than hash
- remove openid table sqllite mutex

* Add default OpenID token lifetime (#599)

* Update dendrite-config.yaml

Co-authored-by: Kegsay <kegsay@gmail.com>
Co-authored-by: Kegsay <kegan@matrix.org>
2021-04-07 13:26:20 +01:00
Kegsay
f8d3a762c4
Add a per-room mutex to federationapi when processing transactions (#1810)
* Add a per-room mutex to federationapi when processing transactions

This has numerous benefits:
 - Prevents us doing lots of state resolutions in busy rooms. Previously, room forks would always result
   in a state resolution being performed immediately, without checking if we were already doing this in
   a different transaction. Now they will queue up, resulting in fewer calls to `/state_ids`, `/g_m_e`, etc.
 - Prevents memory usage from growing too large as a result and potentially OOMing.

And costs:
 - High traffic rooms will be slightly slower due to head-of-line blocking from other servers,
   though this has always been an issue as roomserver has a per-room mutex already.

* Fix unit tests

* Correct mutex lock ordering
2021-03-30 10:01:32 +01:00
Kegsay
af41f6d454
Add Sentry support (#1803)
* Add Sentry support

* Use HTTP Sentry properly maybe

* Capture panics

* Log fed Sentry stuff correctly

* British english linter
2021-03-24 10:25:24 +00:00
Kegsay
802f1c96f8
Add more metrics (#1802)
* Add more metrics

* Linting
2021-03-23 15:22:00 +00:00
Kegsay
a1b7e4ef3f
log less for failed key querys, add counters for incoming pdus/edus (#1801)
* log less for failed key querys, add counters for incoming pdus/edus

* use labels

* Blacklist flakey test

* Fix metrics
2021-03-23 11:33:36 +00:00
Will Hunt
9557ccada4
Fix appsevice alias queries part 2 (#1684)
* Check membership of room

* Use QueryStateAfterEventsResponse

* Fix complexity

* Add field ShouldHitAppservice to GetRoomIDForAlias

* Hit appservice when trying to join a non-existent alias

* remove unused

* Changes that I made a long time ago

* Rename to appserviceJoinedAtEvent

* Check membership in GetMemberships

* Update QueryMembershipsForRoom

* Tweaks in client API

* Update appserviceJoinedAtEvent

* Comments

* Try QueryMembershipForUser instead

* Undo some changes to client API that shouldn't be needed

* More /event tweaks

* Refactor /event bit

* Go back to QueryMembershipsForRoom because appservices are hard

* Fix bugs in onMessage

* Add comments

* More logical naming, clean up a bit

Co-authored-by: Neil Alexander <neilalexander@users.noreply.github.com>
2021-03-03 17:00:31 +00:00
Neil Alexander
d15836e260
Increase gocyclo complexity to 25 (and remove all but 2 golint directives related to it) (#1783) 2021-03-03 14:35:57 +00:00
Neil Alexander
5d74a1757f
Don't query for servers so often in /send (#1766)
* Look up servers less often, don't hit API for missing auth events unless there are actually missing auth events

* Remove ResolveConflictsAdhoc (since it is already in GMSL), other tweaks

* Update gomatrixserverlib to matrix-org/gomatrixserverlib#254

* Fix resolve-state

* Initialise t.servers on first use
2021-02-16 17:12:17 +00:00
Kegsay
93942f8ab6
Gate peeking behind msc flags (#1731) 2021-01-22 16:08:47 +00:00