Synapse 1.79.0rc1 (2023-03-07)
==============================

Features
--------

- Add two new Third Party Rules module API callbacks: [`on_add_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_add_user_third_party_identifier) and [`on_remove_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_remove_user_third_party_identifier). ([\#15044](https://github.com/matrix-org/synapse/issues/15044))
- Experimental support for [MSC3967](https://github.com/matrix-org/matrix-spec-proposals/pull/3967) to not require UIA for setting up cross-signing on first use. ([\#15077](https://github.com/matrix-org/synapse/issues/15077))
- Add media information to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.79/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#15107](https://github.com/matrix-org/synapse/issues/15107))
- Add an [admin API](https://matrix-org.github.io/synapse/latest/usage/administration/admin_api/index.html) to delete a [specific event report](https://spec.matrix.org/v1.6/client-server-api/#reporting-content). ([\#15116](https://github.com/matrix-org/synapse/issues/15116))
- Add support for knocking to workers. ([\#15133](https://github.com/matrix-org/synapse/issues/15133))
- Allow use of the `/filter` Client-Server APIs on workers. ([\#15134](https://github.com/matrix-org/synapse/issues/15134))
- Update support for [MSC2677](https://github.com/matrix-org/matrix-spec-proposals/pull/2677): remove support for server-side aggregation of reactions. ([\#15172](https://github.com/matrix-org/synapse/issues/15172))
- Stabilise support for [MSC3758](https://github.com/matrix-org/matrix-spec-proposals/pull/3758): `event_property_is` push condition. ([\#15185](https://github.com/matrix-org/synapse/issues/15185))

Bugfixes
--------

- Fix a bug introduced in Synapse 1.75 that caused experimental support for deleting account data to raise an internal server error while using an account data writer worker. ([\#14869](https://github.com/matrix-org/synapse/issues/14869))
- Fix a long-standing bug where Synapse handled an unspecced field on push rules. ([\#15088](https://github.com/matrix-org/synapse/issues/15088))
- Fix a long-standing bug where a URL preview would break if the discovered oEmbed failed to download. ([\#15092](https://github.com/matrix-org/synapse/issues/15092))
- Fix a long-standing bug where an initial sync would not respond to changes to the list of ignored users if there was an initial sync cached. ([\#15163](https://github.com/matrix-org/synapse/issues/15163))
- Add the `transaction_id` in the events included in many endpoints' responses. ([\#15174](https://github.com/matrix-org/synapse/issues/15174))
- Fix a bug introduced in Synapse 1.78.0 where requests to claim dehydrated devices would fail with a `405` error. ([\#15180](https://github.com/matrix-org/synapse/issues/15180))
- Stop applying edits when bundling aggregations, per [MSC3925](https://github.com/matrix-org/matrix-spec-proposals/pull/3925). ([\#15193](https://github.com/matrix-org/synapse/issues/15193))
- Fix a long-standing bug where the user directory search was not case-insensitive for accented characters. ([\#15143](https://github.com/matrix-org/synapse/issues/15143))

Updates to the Docker image
---------------------------

- Improve startup logging in the with-workers Docker image. ([\#15186](https://github.com/matrix-org/synapse/issues/15186))

Improved Documentation
----------------------

- Document how to use caches in a module. ([\#14026](https://github.com/matrix-org/synapse/issues/14026))
- Clarify which worker processes the ThirdPartyRules' [`on_new_event`](https://matrix-org.github.io/synapse/v1.78/modules/third_party_rules_callbacks.html#on_new_event) module API callback runs on. ([\#15071](https://github.com/matrix-org/synapse/issues/15071))
- Document using [Shibboleth](https://www.shibboleth.net/) as an OpenID Provider. ([\#15112](https://github.com/matrix-org/synapse/issues/15112))
- Correct reference to `federation_verify_certificates` in configuration documentation. ([\#15139](https://github.com/matrix-org/synapse/issues/15139))
- Correct small documentation errors in some `MatrixFederationHttpClient` methods. ([\#15148](https://github.com/matrix-org/synapse/issues/15148))
- Correct the description of the behavior of `registration_shared_secret_path` on startup. ([\#15168](https://github.com/matrix-org/synapse/issues/15168))

Deprecations and Removals
-------------------------

- Deprecate the `on_threepid_bind` module callback, to be replaced by [`on_add_user_third_party_identifier`](https://matrix-org.github.io/synapse/v1.79/modules/third_party_rules_callbacks.html#on_add_user_third_party_identifier). See [upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.79/docs/upgrade.md#upgrading-to-v1790). ([\#15044]
- Remove the unspecced `room_alias` field from the [`/createRoom`](https://spec.matrix.org/v1.6/client-server-api/#post_matrixclientv3createroom) response. ([\#15093](https://github.com/matrix-org/synapse/issues/15093))
- Remove the unspecced `PUT` on the `/knock/{roomIdOrAlias}` endpoint. ([\#15189](https://github.com/matrix-org/synapse/issues/15189))
- Remove the undocumented and unspecced `type` parameter to the `/thumbnail` endpoint. ([\#15137](https://github.com/matrix-org/synapse/issues/15137))
- Remove unspecced and buggy `PUT` method on the unstable `/rooms/<room_id>/batch_send` endpoint. ([\#15199](https://github.com/matrix-org/synapse/issues/15199))

Internal Changes
----------------

- Run the integration test suites with the asyncio reactor enabled in CI. ([\#14101](https://github.com/matrix-org/synapse/issues/14101))
- Batch up storing state groups when creating a new room. ([\#14918](https://github.com/matrix-org/synapse/issues/14918))
- Update [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952) support based on changes to the MSC. ([\#15051](https://github.com/matrix-org/synapse/issues/15051))
- Refactor writing json data in `FileExfiltrationWriter`. ([\#15095](https://github.com/matrix-org/synapse/issues/15095))
- Tighten the login ratelimit defaults. ([\#15135](https://github.com/matrix-org/synapse/issues/15135))
- Fix a typo in an experimental config setting. ([\#15138](https://github.com/matrix-org/synapse/issues/15138))
- Refactor the media modules. ([\#15146](https://github.com/matrix-org/synapse/issues/15146), [\#15175](https://github.com/matrix-org/synapse/issues/15175))
- Improve type hints. ([\#15164](https://github.com/matrix-org/synapse/issues/15164))
- Move `get_event_report` and `get_event_reports_paginate` from `RoomStore` to `RoomWorkerStore`. ([\#15165](https://github.com/matrix-org/synapse/issues/15165))
- Remove dangling reference to being a reference implementation in docstring. ([\#15167](https://github.com/matrix-org/synapse/issues/15167))
- Add an option to force a rebuild of the "editable" complement image. ([\#15184](https://github.com/matrix-org/synapse/issues/15184))
- Use nightly rustfmt in CI. ([\#15188](https://github.com/matrix-org/synapse/issues/15188))
- Add a `get_next_txn` method to `StreamIdGenerator` to match `MultiWriterIdGenerator`. ([\#15191](https://github.com/matrix-org/synapse/issues/15191))
- Combine `AbstractStreamIdTracker` and `AbstractStreamIdGenerator`. ([\#15192](https://github.com/matrix-org/synapse/issues/15192))
- Automatically fix errors with `ruff`. ([\#15194](https://github.com/matrix-org/synapse/issues/15194))
- Refactor database transaction for query users' devices to reduce database pool contention. ([\#15215](https://github.com/matrix-org/synapse/issues/15215))
- Correct `test_icu_word_boundary_punctuation` so that it passes with the ICU versions available in Alpine and macOS. ([\#15177](https://github.com/matrix-org/synapse/issues/15177))

<details><summary>Locked dependency updates</summary>

  - Bump actions/checkout from 2 to 3. ([\#15155](https://github.com/matrix-org/synapse/issues/15155))
  - Bump black from 22.12.0 to 23.1.0. ([\#15103](https://github.com/matrix-org/synapse/issues/15103))
  - Bump dawidd6/action-download-artifact from 2.25.0 to 2.26.0. ([\#15152](https://github.com/matrix-org/synapse/issues/15152))
  - Bump docker/login-action from 1 to 2. ([\#15154](https://github.com/matrix-org/synapse/issues/15154))
  - Bump matrix-org/backend-meta from 1 to 2. ([\#15156](https://github.com/matrix-org/synapse/issues/15156))
  - Bump ruff from 0.0.237 to 0.0.252. ([\#15159](https://github.com/matrix-org/synapse/issues/15159))
  - Bump serde_json from 1.0.93 to 1.0.94. ([\#15214](https://github.com/matrix-org/synapse/issues/15214))
  - Bump types-commonmark from 0.9.2.1 to 0.9.2.2. ([\#15209](https://github.com/matrix-org/synapse/issues/15209))
  - Bump types-opentracing from 2.4.10.1 to 2.4.10.3. ([\#15158](https://github.com/matrix-org/synapse/issues/15158))
  - Bump types-pillow from 9.4.0.13 to 9.4.0.17. ([\#15211](https://github.com/matrix-org/synapse/issues/15211))
  - Bump types-psycopg2 from 2.9.21.4 to 2.9.21.8. ([\#15210](https://github.com/matrix-org/synapse/issues/15210))
  - Bump types-pyopenssl from 22.1.0.2 to 23.0.0.4. ([\#15213](https://github.com/matrix-org/synapse/issues/15213))
  - Bump types-setuptools from 67.3.0.1 to 67.4.0.3. ([\#15160](https://github.com/matrix-org/synapse/issues/15160))
  - Bump types-setuptools from 67.4.0.3 to 67.5.0.0. ([\#15212](https://github.com/matrix-org/synapse/issues/15212))
  - Bump typing-extensions from 4.4.0 to 4.5.0. ([\#15157](https://github.com/matrix-org/synapse/issues/15157))
</details>

Synapse 1.78.0 (2023-02-28)
===========================

Bugfixes
--------

- Fix a bug introduced in Synapse 1.76 where 5s delays would occasionally occur in deployments using workers. ([\#15150](https://github.com/matrix-org/synapse/issues/15150))

Synapse 1.78.0rc1 (2023-02-21)
==============================

Features
--------

- Implement the experimental `exact_event_match` push rule condition from [MSC3758](https://github.com/matrix-org/matrix-spec-proposals/pull/3758). ([\#14964](https://github.com/matrix-org/synapse/issues/14964))
- Add account data to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.78/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14969](https://github.com/matrix-org/synapse/issues/14969))
- Implement [MSC3873](https://github.com/matrix-org/matrix-spec-proposals/pull/3873) to disambiguate push rule keys with dots in them. ([\#15004](https://github.com/matrix-org/synapse/issues/15004))
- Allow Synapse to use a specific Redis [logical database](https://redis.io/commands/select/) in worker-mode deployments. ([\#15034](https://github.com/matrix-org/synapse/issues/15034))
- Tag opentracing spans for federation requests with the name of the worker serving the request. ([\#15042](https://github.com/matrix-org/synapse/issues/15042))
- Implement the experimental `exact_event_property_contains` push rule condition from [MSC3966](https://github.com/matrix-org/matrix-spec-proposals/pull/3966). ([\#15045](https://github.com/matrix-org/synapse/issues/15045))
- Remove spurious `dont_notify` action from the defaults for the `.m.rule.reaction` pushrule. ([\#15073](https://github.com/matrix-org/synapse/issues/15073))
- Update the error code returned when user sends a duplicate annotation. ([\#15075](https://github.com/matrix-org/synapse/issues/15075))

Bugfixes
--------

- Prevent clients from reporting nonexistent events. ([\#13779](https://github.com/matrix-org/synapse/issues/13779))
- Return spec-compliant JSON errors when unknown endpoints are requested. ([\#14605](https://github.com/matrix-org/synapse/issues/14605))
- Fix a long-standing bug where the room aliases returned could be corrupted. ([\#15038](https://github.com/matrix-org/synapse/issues/15038))
- Fix a bug introduced in Synapse 1.76.0 where partially-joined rooms could not be deleted using the [purge room API](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#delete-room-api). ([\#15068](https://github.com/matrix-org/synapse/issues/15068))
- Fix a long-standing bug where federated joins would fail if the first server in the list of servers to try is not in the room. ([\#15074](https://github.com/matrix-org/synapse/issues/15074))
- Fix a bug introduced in Synapse v1.74.0 where searching with colons when using ICU for search term tokenisation would fail with an error. ([\#15079](https://github.com/matrix-org/synapse/issues/15079))
- Reduce the likelihood of a rare race condition where rejoining a restricted room over federation would fail. ([\#15080](https://github.com/matrix-org/synapse/issues/15080))
- Fix a bug introduced in Synapse 1.76 where workers would fail to start if the `health` listener was configured. ([\#15096](https://github.com/matrix-org/synapse/issues/15096))
- Fix a bug introduced in Synapse 1.75 where the [portdb script](https://matrix-org.github.io/synapse/release-v1.78/postgres.html#porting-from-sqlite) would fail to run after a room had been faster-joined. ([\#15108](https://github.com/matrix-org/synapse/issues/15108))

Improved Documentation
----------------------

- Document how to start Synapse with Poetry. Contributed by @thezaidbintariq. ([\#14892](https://github.com/matrix-org/synapse/issues/14892), [\#15022](https://github.com/matrix-org/synapse/issues/15022))
- Update delegation documentation to clarify that SRV DNS delegation does not eliminate all needs to serve files from .well-known locations. Contributed by @williamkray. ([\#14959](https://github.com/matrix-org/synapse/issues/14959))
- Fix a mistake in registration_shared_secret_path docs. ([\#15078](https://github.com/matrix-org/synapse/issues/15078))
- Refer to a more recent blog post on the [Database Maintenance Tools](https://matrix-org.github.io/synapse/latest/usage/administration/database_maintenance_tools.html) page. Contributed by @jahway603. ([\#15083](https://github.com/matrix-org/synapse/issues/15083))

Internal Changes
----------------

- Re-type hint some collections as read-only. ([\#13755](https://github.com/matrix-org/synapse/issues/13755))
- Faster joins: don't stall when another user joins during a partial-state room resync. ([\#14606](https://github.com/matrix-org/synapse/issues/14606))
- Add a class `UnpersistedEventContext` to allow for the batching up of storing state groups. ([\#14675](https://github.com/matrix-org/synapse/issues/14675))
- Add a check to ensure that locked dependencies have source distributions available. ([\#14742](https://github.com/matrix-org/synapse/issues/14742))
- Tweak comment on `_is_local_room_accessible` as part of room visibility in `/hierarchy` to clarify the condition for a room being visible. ([\#14834](https://github.com/matrix-org/synapse/issues/14834))
- Prevent `WARNING: there is already a transaction in progress` lines appearing in PostgreSQL's logs on some occasions. ([\#14840](https://github.com/matrix-org/synapse/issues/14840))
- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14929](https://github.com/matrix-org/synapse/issues/14929))
- Improve performance of `/sync` in a few situations. ([\#14973](https://github.com/matrix-org/synapse/issues/14973))
- Limit concurrent event creation for a room to avoid state resolution when sending bursts of events to a local room. ([\#14977](https://github.com/matrix-org/synapse/issues/14977))
- Skip calculating unread push actions in /sync when enable_push is false. ([\#14980](https://github.com/matrix-org/synapse/issues/14980))
- Add a schema dump symlinks inside `contrib`, to make it easier for IDEs to interrogate Synapse's database schema. ([\#14982](https://github.com/matrix-org/synapse/issues/14982))
- Improve type hints. ([\#15008](https://github.com/matrix-org/synapse/issues/15008), [\#15026](https://github.com/matrix-org/synapse/issues/15026), [\#15027](https://github.com/matrix-org/synapse/issues/15027), [\#15028](https://github.com/matrix-org/synapse/issues/15028), [\#15031](https://github.com/matrix-org/synapse/issues/15031), [\#15035](https://github.com/matrix-org/synapse/issues/15035), [\#15052](https://github.com/matrix-org/synapse/issues/15052), [\#15072](https://github.com/matrix-org/synapse/issues/15072), [\#15084](https://github.com/matrix-org/synapse/issues/15084))
- Update [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952) support based on changes to the MSC. ([\#15037](https://github.com/matrix-org/synapse/issues/15037))
- Avoid mutating a cached value in `get_user_devices_from_cache`. ([\#15040](https://github.com/matrix-org/synapse/issues/15040))
- Fix a rare exception in logs on start up. ([\#15041](https://github.com/matrix-org/synapse/issues/15041))
- Update pyo3-log to v0.8.1. ([\#15043](https://github.com/matrix-org/synapse/issues/15043))
- Avoid mutating cached values in `_generate_sync_entry_for_account_data`. ([\#15047](https://github.com/matrix-org/synapse/issues/15047))
- Refactor arguments of `try_unbind_threepid` and `_try_unbind_threepid_with_id_server` to not use dictionaries. ([\#15053](https://github.com/matrix-org/synapse/issues/15053))
- Merge debug logging from the hotfixes branch. ([\#15054](https://github.com/matrix-org/synapse/issues/15054))
- Faster joins: omit device list updates originating from partial state rooms in /sync responses without lazy loading of members enabled. ([\#15069](https://github.com/matrix-org/synapse/issues/15069))
- Fix clashing database transaction name. ([\#15070](https://github.com/matrix-org/synapse/issues/15070))
- Upper-bound frozendict dependency. This works around us being unable to test installing our wheels against Python 3.11 in CI. ([\#15114](https://github.com/matrix-org/synapse/issues/15114))
- Tweak logging for when a worker waits for its view of a replication stream to catch up. ([\#15120](https://github.com/matrix-org/synapse/issues/15120))

<details><summary>Locked dependency updates</summary>

- Bump bleach from 5.0.1 to 6.0.0. ([\#15059](https://github.com/matrix-org/synapse/issues/15059))
- Bump cryptography from 38.0.4 to 39.0.1. ([\#15020](https://github.com/matrix-org/synapse/issues/15020))
- Bump ruff version from 0.0.230 to 0.0.237. ([\#15033](https://github.com/matrix-org/synapse/issues/15033))
- Bump dtolnay/rust-toolchain from 9cd00a88a73addc8617065438eff914dd08d0955 to 25dc93b901a87e864900a8aec6c12e9aa794c0c3. ([\#15060](https://github.com/matrix-org/synapse/issues/15060))
- Bump systemd-python from 234 to 235. ([\#15061](https://github.com/matrix-org/synapse/issues/15061))
- Bump serde_json from 1.0.92 to 1.0.93. ([\#15062](https://github.com/matrix-org/synapse/issues/15062))
- Bump types-requests from 2.28.11.8 to 2.28.11.12. ([\#15063](https://github.com/matrix-org/synapse/issues/15063))
- Bump types-pillow from 9.4.0.5 to 9.4.0.10. ([\#15064](https://github.com/matrix-org/synapse/issues/15064))
- Bump sentry-sdk from 1.13.0 to 1.15.0. ([\#15065](https://github.com/matrix-org/synapse/issues/15065))
- Bump types-jsonschema from 4.17.0.3 to 4.17.0.5. ([\#15099](https://github.com/matrix-org/synapse/issues/15099))
- Bump types-bleach from 5.0.3.1 to 6.0.0.0. ([\#15100](https://github.com/matrix-org/synapse/issues/15100))
- Bump dtolnay/rust-toolchain from 25dc93b901a87e864900a8aec6c12e9aa794c0c3 to e12eda571dc9a5ee5d58eecf4738ec291c66f295. ([\#15101](https://github.com/matrix-org/synapse/issues/15101))
- Bump dawidd6/action-download-artifact from 2.24.3 to 2.25.0. ([\#15102](https://github.com/matrix-org/synapse/issues/15102))
- Bump types-pillow from 9.4.0.10 to 9.4.0.13. ([\#15104](https://github.com/matrix-org/synapse/issues/15104))
- Bump types-setuptools from 67.1.0.0 to 67.3.0.1. ([\#15105](https://github.com/matrix-org/synapse/issues/15105))

</details>

Synapse 1.78.0rc1 (2023-02-21)
==============================

Features
--------

- Implement the experimental `exact_event_match` push rule condition from [MSC3758](https://github.com/matrix-org/matrix-spec-proposals/pull/3758). ([\#14964](https://github.com/matrix-org/synapse/issues/14964))
- Add account data to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.78/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14969](https://github.com/matrix-org/synapse/issues/14969))
- Implement [MSC3873](https://github.com/matrix-org/matrix-spec-proposals/pull/3873) to disambiguate push rule keys with dots in them. ([\#15004](https://github.com/matrix-org/synapse/issues/15004))
- Allow Synapse to use a specific Redis [logical database](https://redis.io/commands/select/) in worker-mode deployments. ([\#15034](https://github.com/matrix-org/synapse/issues/15034))
- Tag opentracing spans for federation requests with the name of the worker serving the request. ([\#15042](https://github.com/matrix-org/synapse/issues/15042))
- Implement the experimental `exact_event_property_contains` push rule condition from [MSC3966](https://github.com/matrix-org/matrix-spec-proposals/pull/3966). ([\#15045](https://github.com/matrix-org/synapse/issues/15045))
- Remove spurious `dont_notify` action from the defaults for the `.m.rule.reaction` pushrule. ([\#15073](https://github.com/matrix-org/synapse/issues/15073))
- Update the error code returned when user sends a duplicate annotation. ([\#15075](https://github.com/matrix-org/synapse/issues/15075))

Bugfixes
--------

- Prevent clients from reporting nonexistent events. ([\#13779](https://github.com/matrix-org/synapse/issues/13779))
- Return spec-compliant JSON errors when unknown endpoints are requested. ([\#14605](https://github.com/matrix-org/synapse/issues/14605))
- Fix a long-standing bug where the room aliases returned could be corrupted. ([\#15038](https://github.com/matrix-org/synapse/issues/15038))
- Fix a bug introduced in Synapse 1.76.0 where partially-joined rooms could not be deleted using the [purge room API](https://matrix-org.github.io/synapse/latest/admin_api/rooms.html#delete-room-api). ([\#15068](https://github.com/matrix-org/synapse/issues/15068))
- Fix a long-standing bug where federated joins would fail if the first server in the list of servers to try is not in the room. ([\#15074](https://github.com/matrix-org/synapse/issues/15074))
- Fix a bug introduced in Synapse v1.74.0 where searching with colons when using ICU for search term tokenisation would fail with an error. ([\#15079](https://github.com/matrix-org/synapse/issues/15079))
- Reduce the likelihood of a rare race condition where rejoining a restricted room over federation would fail. ([\#15080](https://github.com/matrix-org/synapse/issues/15080))
- Fix a bug introduced in Synapse 1.76 where workers would fail to start if the `health` listener was configured. ([\#15096](https://github.com/matrix-org/synapse/issues/15096))
- Fix a bug introduced in Synapse 1.75 where the [portdb script](https://matrix-org.github.io/synapse/release-v1.78/postgres.html#porting-from-sqlite) would fail to run after a room had been faster-joined. ([\#15108](https://github.com/matrix-org/synapse/issues/15108))

Improved Documentation
----------------------

- Document how to start Synapse with Poetry. Contributed by @thezaidbintariq. ([\#14892](https://github.com/matrix-org/synapse/issues/14892), [\#15022](https://github.com/matrix-org/synapse/issues/15022))
- Update delegation documentation to clarify that SRV DNS delegation does not eliminate all needs to serve files from .well-known locations. Contributed by @williamkray. ([\#14959](https://github.com/matrix-org/synapse/issues/14959))
- Fix a mistake in registration_shared_secret_path docs. ([\#15078](https://github.com/matrix-org/synapse/issues/15078))
- Refer to a more recent blog post on the [Database Maintenance Tools](https://matrix-org.github.io/synapse/latest/usage/administration/database_maintenance_tools.html) page. Contributed by @jahway603. ([\#15083](https://github.com/matrix-org/synapse/issues/15083))

Internal Changes
----------------

- Re-type hint some collections as read-only. ([\#13755](https://github.com/matrix-org/synapse/issues/13755))
- Faster joins: don't stall when another user joins during a partial-state room resync. ([\#14606](https://github.com/matrix-org/synapse/issues/14606))
- Add a class `UnpersistedEventContext` to allow for the batching up of storing state groups. ([\#14675](https://github.com/matrix-org/synapse/issues/14675))
- Add a check to ensure that locked dependencies have source distributions available. ([\#14742](https://github.com/matrix-org/synapse/issues/14742))
- Tweak comment on `_is_local_room_accessible` as part of room visibility in `/hierarchy` to clarify the condition for a room being visible. ([\#14834](https://github.com/matrix-org/synapse/issues/14834))
- Prevent `WARNING: there is already a transaction in progress` lines appearing in PostgreSQL's logs on some occasions. ([\#14840](https://github.com/matrix-org/synapse/issues/14840))
- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14929](https://github.com/matrix-org/synapse/issues/14929))
- Improve performance of `/sync` in a few situations. ([\#14973](https://github.com/matrix-org/synapse/issues/14973))
- Limit concurrent event creation for a room to avoid state resolution when sending bursts of events to a local room. ([\#14977](https://github.com/matrix-org/synapse/issues/14977))
- Skip calculating unread push actions in /sync when enable_push is false. ([\#14980](https://github.com/matrix-org/synapse/issues/14980))
- Add a schema dump symlinks inside `contrib`, to make it easier for IDEs to interrogate Synapse's database schema. ([\#14982](https://github.com/matrix-org/synapse/issues/14982))
- Improve type hints. ([\#15008](https://github.com/matrix-org/synapse/issues/15008), [\#15026](https://github.com/matrix-org/synapse/issues/15026), [\#15027](https://github.com/matrix-org/synapse/issues/15027), [\#15028](https://github.com/matrix-org/synapse/issues/15028), [\#15031](https://github.com/matrix-org/synapse/issues/15031), [\#15035](https://github.com/matrix-org/synapse/issues/15035), [\#15052](https://github.com/matrix-org/synapse/issues/15052), [\#15072](https://github.com/matrix-org/synapse/issues/15072), [\#15084](https://github.com/matrix-org/synapse/issues/15084))
- Update [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952) support based on changes to the MSC. ([\#15037](https://github.com/matrix-org/synapse/issues/15037))
- Avoid mutating a cached value in `get_user_devices_from_cache`. ([\#15040](https://github.com/matrix-org/synapse/issues/15040))
- Fix a rare exception in logs on start up. ([\#15041](https://github.com/matrix-org/synapse/issues/15041))
- Update pyo3-log to v0.8.1. ([\#15043](https://github.com/matrix-org/synapse/issues/15043))
- Avoid mutating cached values in `_generate_sync_entry_for_account_data`. ([\#15047](https://github.com/matrix-org/synapse/issues/15047))
- Refactor arguments of `try_unbind_threepid` and `_try_unbind_threepid_with_id_server` to not use dictionaries. ([\#15053](https://github.com/matrix-org/synapse/issues/15053))
- Merge debug logging from the hotfixes branch. ([\#15054](https://github.com/matrix-org/synapse/issues/15054))
- Faster joins: omit device list updates originating from partial state rooms in /sync responses without lazy loading of members enabled. ([\#15069](https://github.com/matrix-org/synapse/issues/15069))
- Fix clashing database transaction name. ([\#15070](https://github.com/matrix-org/synapse/issues/15070))
- Upper-bound frozendict dependency. This works around us being unable to test installing our wheels against Python 3.11 in CI. ([\#15114](https://github.com/matrix-org/synapse/issues/15114))
- Tweak logging for when a worker waits for its view of a replication stream to catch up. ([\#15120](https://github.com/matrix-org/synapse/issues/15120))

<details><summary>Locked dependency updates</summary>

- Bump bleach from 5.0.1 to 6.0.0. ([\#15059](https://github.com/matrix-org/synapse/issues/15059))
- Bump cryptography from 38.0.4 to 39.0.1. ([\#15020](https://github.com/matrix-org/synapse/issues/15020))
- Bump ruff version from 0.0.230 to 0.0.237. ([\#15033](https://github.com/matrix-org/synapse/issues/15033))
- Bump dtolnay/rust-toolchain from 9cd00a88a73addc8617065438eff914dd08d0955 to 25dc93b901a87e864900a8aec6c12e9aa794c0c3. ([\#15060](https://github.com/matrix-org/synapse/issues/15060))
- Bump systemd-python from 234 to 235. ([\#15061](https://github.com/matrix-org/synapse/issues/15061))
- Bump serde_json from 1.0.92 to 1.0.93. ([\#15062](https://github.com/matrix-org/synapse/issues/15062))
- Bump types-requests from 2.28.11.8 to 2.28.11.12. ([\#15063](https://github.com/matrix-org/synapse/issues/15063))
- Bump types-pillow from 9.4.0.5 to 9.4.0.10. ([\#15064](https://github.com/matrix-org/synapse/issues/15064))
- Bump sentry-sdk from 1.13.0 to 1.15.0. ([\#15065](https://github.com/matrix-org/synapse/issues/15065))
- Bump types-jsonschema from 4.17.0.3 to 4.17.0.5. ([\#15099](https://github.com/matrix-org/synapse/issues/15099))
- Bump types-bleach from 5.0.3.1 to 6.0.0.0. ([\#15100](https://github.com/matrix-org/synapse/issues/15100))
- Bump dtolnay/rust-toolchain from 25dc93b901a87e864900a8aec6c12e9aa794c0c3 to e12eda571dc9a5ee5d58eecf4738ec291c66f295. ([\#15101](https://github.com/matrix-org/synapse/issues/15101))
- Bump dawidd6/action-download-artifact from 2.24.3 to 2.25.0. ([\#15102](https://github.com/matrix-org/synapse/issues/15102))
- Bump types-pillow from 9.4.0.10 to 9.4.0.13. ([\#15104](https://github.com/matrix-org/synapse/issues/15104))
- Bump types-setuptools from 67.1.0.0 to 67.3.0.1. ([\#15105](https://github.com/matrix-org/synapse/issues/15105))

</details>

Synapse 1.77.0 (2023-02-14)
===========================

No significant changes since 1.77.0rc2.

Synapse 1.77.0rc2 (2023-02-10)
==============================

Bugfixes
--------

- Fix bug where retried replication requests would return a failure. Introduced in v1.76.0. ([\#15024](https://github.com/matrix-org/synapse/issues/15024))

Internal Changes
----------------

- Prepare for future database schema changes. ([\#15036](https://github.com/matrix-org/synapse/issues/15036))

Synapse 1.77.0rc1 (2023-02-07)
==============================

Features
--------

- Experimental support for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952): intentional mentions. ([\#14823](https://github.com/matrix-org/synapse/issues/14823), [\#14943](https://github.com/matrix-org/synapse/issues/14943), [\#14957](https://github.com/matrix-org/synapse/issues/14957), [\#14958](https://github.com/matrix-org/synapse/issues/14958))
- Experimental support to suppress notifications from message edits ([MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958)). ([\#14960](https://github.com/matrix-org/synapse/issues/14960), [\#15016](https://github.com/matrix-org/synapse/issues/15016))
- Add profile information, devices and connections to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.77/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14894](https://github.com/matrix-org/synapse/issues/14894))
- Improve performance when joining or sending an event in large rooms. ([\#14962](https://github.com/matrix-org/synapse/issues/14962))
- Improve performance of joining and leaving large rooms with many local users. ([\#14971](https://github.com/matrix-org/synapse/issues/14971))

Bugfixes
--------

- Fix a bug introduced in Synapse 1.53.0 where `next_batch` tokens from `/sync` could not be used with the `/relations` endpoint. ([\#14866](https://github.com/matrix-org/synapse/issues/14866))
- Fix a bug introduced in Synapse 1.35.0 where the module API's `send_local_online_presence_to` would fail to send presence updates over federation. ([\#14880](https://github.com/matrix-org/synapse/issues/14880))
- Fix a bug introduced in Synapse 1.70.0 where the background updates to add non-thread unique indexes on receipts could fail when upgrading from 1.67.0 or earlier. ([\#14915](https://github.com/matrix-org/synapse/issues/14915))
- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14926](https://github.com/matrix-org/synapse/issues/14926))
- Fix a bug introduced in Synapse 1.68.0 where we were unable to service remote joins in rooms with `@room` notification levels set to `null` in their (malformed) power levels. ([\#14942](https://github.com/matrix-org/synapse/issues/14942))
- Fix a bug introduced in Synapse 1.64.0 where boolean power levels were erroneously permitted in [v10 rooms](https://spec.matrix.org/v1.5/rooms/v10/). ([\#14944](https://github.com/matrix-org/synapse/issues/14944))
- Fix a long-standing bug where sending messages on servers with presence enabled would spam "Re-starting finished log context" log lines. ([\#14947](https://github.com/matrix-org/synapse/issues/14947))
- Fix a bug introduced in Synapse 1.68.0 where logging from the Rust module was not properly logged. ([\#14976](https://github.com/matrix-org/synapse/issues/14976))
- Fix various long-standing bugs in Synapse's config, event and request handling where booleans were unintentionally accepted where an integer was expected. ([\#14945](https://github.com/matrix-org/synapse/issues/14945))

Internal Changes
----------------

- Add missing type hints. ([\#14879](https://github.com/matrix-org/synapse/issues/14879), [\#14886](https://github.com/matrix-org/synapse/issues/14886), [\#14887](https://github.com/matrix-org/synapse/issues/14887), [\#14904](https://github.com/matrix-org/synapse/issues/14904), [\#14927](https://github.com/matrix-org/synapse/issues/14927), [\#14956](https://github.com/matrix-org/synapse/issues/14956), [\#14983](https://github.com/matrix-org/synapse/issues/14983), [\#14984](https://github.com/matrix-org/synapse/issues/14984), [\#14985](https://github.com/matrix-org/synapse/issues/14985), [\#14987](https://github.com/matrix-org/synapse/issues/14987), [\#14988](https://github.com/matrix-org/synapse/issues/14988), [\#14990](https://github.com/matrix-org/synapse/issues/14990), [\#14991](https://github.com/matrix-org/synapse/issues/14991), [\#14992](https://github.com/matrix-org/synapse/issues/14992), [\#15007](https://github.com/matrix-org/synapse/issues/15007))
- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14922](https://github.com/matrix-org/synapse/issues/14922))
- Allow running the complement tests suites with the asyncio reactor enabled. ([\#14858](https://github.com/matrix-org/synapse/issues/14858))
- Improve performance of `/sync` in a few situations. ([\#14908](https://github.com/matrix-org/synapse/issues/14908), [\#14970](https://github.com/matrix-org/synapse/issues/14970))
- Document how to handle Dependabot pull requests. ([\#14916](https://github.com/matrix-org/synapse/issues/14916))
- Fix typo in release script. ([\#14920](https://github.com/matrix-org/synapse/issues/14920))
- Update build system requirements to allow building with poetry-core 1.5.0. ([\#14949](https://github.com/matrix-org/synapse/issues/14949), [\#15019](https://github.com/matrix-org/synapse/issues/15019))
- Add an [lnav](https://lnav.org) config file for Synapse logs to `/contrib/lnav`. ([\#14953](https://github.com/matrix-org/synapse/issues/14953))
- Faster joins: Refactor internal handling of servers in room to never store an empty list. ([\#14954](https://github.com/matrix-org/synapse/issues/14954))
- Faster joins: tag `v2/send_join/` requests to indicate if they served a partial join response. ([\#14950](https://github.com/matrix-org/synapse/issues/14950))
- Allow running `cargo` without the `extension-module` option. ([\#14965](https://github.com/matrix-org/synapse/issues/14965))
- Preparatory work for adding a denormalised event stream ordering column in the future. Contributed by Nick @ Beeper (@fizzadar). ([\#14979](https://github.com/matrix-org/synapse/issues/14979), [9cd7610](https://github.com/matrix-org/synapse/commit/9cd7610f86ab5051c9365dd38d1eec405a5f8ca6), [f10caa7](https://github.com/matrix-org/synapse/commit/f10caa73eee0caa91cf373966104d1ededae2aee); see [\#15014](https://github.com/matrix-org/synapse/issues/15014))
- Add tests for `_flatten_dict`. ([\#14981](https://github.com/matrix-org/synapse/issues/14981), [\#15002](https://github.com/matrix-org/synapse/issues/15002))

<details><summary>Dependabot updates</summary>

- Bump dtolnay/rust-toolchain from e645b0cf01249a964ec099494d38d2da0f0b349f to 9cd00a88a73addc8617065438eff914dd08d0955. ([\#14968](https://github.com/matrix-org/synapse/issues/14968))
- Bump docker/build-push-action from 3 to 4. ([\#14952](https://github.com/matrix-org/synapse/issues/14952))
- Bump ijson from 3.1.4 to 3.2.0.post0. ([\#14935](https://github.com/matrix-org/synapse/issues/14935))
- Bump types-pyyaml from 6.0.12.2 to 6.0.12.3. ([\#14936](https://github.com/matrix-org/synapse/issues/14936))
- Bump types-jsonschema from 4.17.0.2 to 4.17.0.3. ([\#14937](https://github.com/matrix-org/synapse/issues/14937))
- Bump types-pillow from 9.4.0.3 to 9.4.0.5. ([\#14938](https://github.com/matrix-org/synapse/issues/14938))
- Bump hiredis from 2.0.0 to 2.1.1. ([\#14939](https://github.com/matrix-org/synapse/issues/14939))
- Bump hiredis from 2.1.1 to 2.2.1. ([\#14993](https://github.com/matrix-org/synapse/issues/14993))
- Bump types-setuptools from 65.6.0.3 to 67.1.0.0. ([\#14994](https://github.com/matrix-org/synapse/issues/14994))
- Bump prometheus-client from 0.15.0 to 0.16.0. ([\#14995](https://github.com/matrix-org/synapse/issues/14995))
- Bump anyhow from 1.0.68 to 1.0.69. ([\#14996](https://github.com/matrix-org/synapse/issues/14996))
- Bump serde_json from 1.0.91 to 1.0.92. ([\#14997](https://github.com/matrix-org/synapse/issues/14997))
- Bump isort from 5.11.4 to 5.11.5. ([\#14998](https://github.com/matrix-org/synapse/issues/14998))
- Bump phonenumbers from 8.13.4 to 8.13.5. ([\#14999](https://github.com/matrix-org/synapse/issues/14999))
</details>

Synapse 1.77.0rc2 (2023-02-10)
==============================

Bugfixes
--------

- Fix bug where retried replication requests would return a failure. Introduced in v1.76.0. ([\#15024](https://github.com/matrix-org/synapse/issues/15024))

Internal Changes
----------------

- Prepare for future database schema changes. ([\#15036](https://github.com/matrix-org/synapse/issues/15036))

Synapse 1.77.0rc1 (2023-02-07)
==============================

Features
--------

- Experimental support for [MSC3952](https://github.com/matrix-org/matrix-spec-proposals/pull/3952): intentional mentions. ([\#14823](https://github.com/matrix-org/synapse/issues/14823), [\#14943](https://github.com/matrix-org/synapse/issues/14943), [\#14957](https://github.com/matrix-org/synapse/issues/14957), [\#14958](https://github.com/matrix-org/synapse/issues/14958))
- Experimental support to suppress notifications from message edits ([MSC3958](https://github.com/matrix-org/matrix-spec-proposals/pull/3958)). ([\#14960](https://github.com/matrix-org/synapse/issues/14960), [\#15016](https://github.com/matrix-org/synapse/issues/15016))
- Add profile information, devices and connections to the command line [user data export tool](https://matrix-org.github.io/synapse/v1.77/usage/administration/admin_faq.html#how-can-i-export-user-data). ([\#14894](https://github.com/matrix-org/synapse/issues/14894))
- Improve performance when joining or sending an event in large rooms. ([\#14962](https://github.com/matrix-org/synapse/issues/14962))
- Improve performance of joining and leaving large rooms with many local users. ([\#14971](https://github.com/matrix-org/synapse/issues/14971))

Bugfixes
--------

- Fix a bug introduced in Synapse 1.53.0 where `next_batch` tokens from `/sync` could not be used with the `/relations` endpoint. ([\#14866](https://github.com/matrix-org/synapse/issues/14866))
- Fix a bug introduced in Synapse 1.35.0 where the module API's `send_local_online_presence_to` would fail to send presence updates over federation. ([\#14880](https://github.com/matrix-org/synapse/issues/14880))
- Fix a bug introduced in Synapse 1.70.0 where the background updates to add non-thread unique indexes on receipts could fail when upgrading from 1.67.0 or earlier. ([\#14915](https://github.com/matrix-org/synapse/issues/14915))
- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14926](https://github.com/matrix-org/synapse/issues/14926))
- Fix a bug introduced in Synapse 1.68.0 where we were unable to service remote joins in rooms with `@room` notification levels set to `null` in their (malformed) power levels. ([\#14942](https://github.com/matrix-org/synapse/issues/14942))
- Fix a bug introduced in Synapse 1.64.0 where boolean power levels were erroneously permitted in [v10 rooms](https://spec.matrix.org/v1.5/rooms/v10/). ([\#14944](https://github.com/matrix-org/synapse/issues/14944))
- Fix a long-standing bug where sending messages on servers with presence enabled would spam "Re-starting finished log context" log lines. ([\#14947](https://github.com/matrix-org/synapse/issues/14947))
- Fix a bug introduced in Synapse 1.68.0 where logging from the Rust module was not properly logged. ([\#14976](https://github.com/matrix-org/synapse/issues/14976))
- Fix various long-standing bugs in Synapse's config, event and request handling where booleans were unintentionally accepted where an integer was expected. ([\#14945](https://github.com/matrix-org/synapse/issues/14945))

Internal Changes
----------------

- Add missing type hints. ([\#14879](https://github.com/matrix-org/synapse/issues/14879), [\#14886](https://github.com/matrix-org/synapse/issues/14886), [\#14887](https://github.com/matrix-org/synapse/issues/14887), [\#14904](https://github.com/matrix-org/synapse/issues/14904), [\#14927](https://github.com/matrix-org/synapse/issues/14927), [\#14956](https://github.com/matrix-org/synapse/issues/14956), [\#14983](https://github.com/matrix-org/synapse/issues/14983), [\#14984](https://github.com/matrix-org/synapse/issues/14984), [\#14985](https://github.com/matrix-org/synapse/issues/14985), [\#14987](https://github.com/matrix-org/synapse/issues/14987), [\#14988](https://github.com/matrix-org/synapse/issues/14988), [\#14990](https://github.com/matrix-org/synapse/issues/14990), [\#14991](https://github.com/matrix-org/synapse/issues/14991), [\#14992](https://github.com/matrix-org/synapse/issues/14992), [\#15007](https://github.com/matrix-org/synapse/issues/15007))
- Use `StrCollection` to avoid potential bugs with `Collection[str]`. ([\#14922](https://github.com/matrix-org/synapse/issues/14922))
- Allow running the complement tests suites with the asyncio reactor enabled. ([\#14858](https://github.com/matrix-org/synapse/issues/14858))
- Improve performance of `/sync` in a few situations. ([\#14908](https://github.com/matrix-org/synapse/issues/14908), [\#14970](https://github.com/matrix-org/synapse/issues/14970))
- Document how to handle Dependabot pull requests. ([\#14916](https://github.com/matrix-org/synapse/issues/14916))
- Fix typo in release script. ([\#14920](https://github.com/matrix-org/synapse/issues/14920))
- Update build system requirements to allow building with poetry-core 1.5.0. ([\#14949](https://github.com/matrix-org/synapse/issues/14949), [\#15019](https://github.com/matrix-org/synapse/issues/15019))
- Add an [lnav](https://lnav.org) config file for Synapse logs to `/contrib/lnav`. ([\#14953](https://github.com/matrix-org/synapse/issues/14953))
- Faster joins: Refactor internal handling of servers in room to never store an empty list. ([\#14954](https://github.com/matrix-org/synapse/issues/14954))
- Faster joins: tag `v2/send_join/` requests to indicate if they served a partial join response. ([\#14950](https://github.com/matrix-org/synapse/issues/14950))
- Allow running `cargo` without the `extension-module` option. ([\#14965](https://github.com/matrix-org/synapse/issues/14965))
- Preparatory work for adding a denormalised event stream ordering column in the future. Contributed by Nick @ Beeper (@fizzadar). ([\#14979](https://github.com/matrix-org/synapse/issues/14979), [9cd7610](https://github.com/matrix-org/synapse/commit/9cd7610f86ab5051c9365dd38d1eec405a5f8ca6), [f10caa7](https://github.com/matrix-org/synapse/commit/f10caa73eee0caa91cf373966104d1ededae2aee); see [\#15014](https://github.com/matrix-org/synapse/issues/15014))
- Add tests for `_flatten_dict`. ([\#14981](https://github.com/matrix-org/synapse/issues/14981), [\#15002](https://github.com/matrix-org/synapse/issues/15002))

<details><summary>Dependabot updates</summary>

- Bump dtolnay/rust-toolchain from e645b0cf01249a964ec099494d38d2da0f0b349f to 9cd00a88a73addc8617065438eff914dd08d0955. ([\#14968](https://github.com/matrix-org/synapse/issues/14968))
- Bump docker/build-push-action from 3 to 4. ([\#14952](https://github.com/matrix-org/synapse/issues/14952))
- Bump ijson from 3.1.4 to 3.2.0.post0. ([\#14935](https://github.com/matrix-org/synapse/issues/14935))
- Bump types-pyyaml from 6.0.12.2 to 6.0.12.3. ([\#14936](https://github.com/matrix-org/synapse/issues/14936))
- Bump types-jsonschema from 4.17.0.2 to 4.17.0.3. ([\#14937](https://github.com/matrix-org/synapse/issues/14937))
- Bump types-pillow from 9.4.0.3 to 9.4.0.5. ([\#14938](https://github.com/matrix-org/synapse/issues/14938))
- Bump hiredis from 2.0.0 to 2.1.1. ([\#14939](https://github.com/matrix-org/synapse/issues/14939))
- Bump hiredis from 2.1.1 to 2.2.1. ([\#14993](https://github.com/matrix-org/synapse/issues/14993))
- Bump types-setuptools from 65.6.0.3 to 67.1.0.0. ([\#14994](https://github.com/matrix-org/synapse/issues/14994))
- Bump prometheus-client from 0.15.0 to 0.16.0. ([\#14995](https://github.com/matrix-org/synapse/issues/14995))
- Bump anyhow from 1.0.68 to 1.0.69. ([\#14996](https://github.com/matrix-org/synapse/issues/14996))
- Bump serde_json from 1.0.91 to 1.0.92. ([\#14997](https://github.com/matrix-org/synapse/issues/14997))
- Bump isort from 5.11.4 to 5.11.5. ([\#14998](https://github.com/matrix-org/synapse/issues/14998))
- Bump phonenumbers from 8.13.4 to 8.13.5. ([\#14999](https://github.com/matrix-org/synapse/issues/14999))
</details>

Synapse 1.76.0 (2023-01-31)
===========================

The 1.76 release is the first to enable faster joins ([MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706) and [MSC3902](https://github.com/matrix-org/matrix-spec-proposals/pull/3902)) by default. Admins can opt-out: see [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#faster-joins-are-enabled-by-default) for more details.

The upgrade from 1.75 to 1.76 changes the account data replication streams in a backwards-incompatible manner. Server operators running a multi-worker deployment should consult [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#changes-to-the-account-data-replication-streams).

Those who are `poetry install`ing from source using our lockfile should ensure their poetry version is 1.3.2 or higher; [see upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#minimum-version-of-poetry-is-now-132).

Notes on faster joins
---------------------

The faster joins project sees the most benefit when joining a room with a large number of members (joined or historical). We expect it to be particularly useful for joining large public rooms like the [Matrix HQ](https://matrix.to/#/#matrix:matrix.org) or [Synapse Admins](https://matrix.to/#/#synapse:matrix.org) rooms.

After a faster join, Synapse considers that room "partially joined". In this state, you should be able to

- read incoming messages;
- see incoming state changes, e.g. room topic changes; and
- send messages, if the room is unencrypted.

Synapse has to spend more effort to complete the join in the background. Once this finishes, you will be able to

- send messages, if the room is in encrypted;
- retrieve room history from before your join, if permitted by the room settings; and
- access the full list of room members.

Improved Documentation
----------------------

- Describe the ideas and the internal machinery behind faster joins. ([\#14677](https://github.com/matrix-org/synapse/issues/14677))

Synapse 1.76.0rc2 (2023-01-27)
==============================

Bugfixes
--------

- Faster joins: Fix a bug introduced in Synapse 1.69 where device list EDUs could fail to be handled after a restart when a faster join sync is in progress. ([\#14914](https://github.com/matrix-org/synapse/issues/14914))

Internal Changes
----------------

- Faster joins: Improve performance of looking up partial-state status of rooms. ([\#14917](https://github.com/matrix-org/synapse/issues/14917))

Synapse 1.76.0rc1 (2023-01-25)
==============================

Features
--------

- Update the default room version to [v10](https://spec.matrix.org/v1.5/rooms/v10/) ([MSC 3904](https://github.com/matrix-org/matrix-spec-proposals/pull/3904)). Contributed by @FSG-Cat. ([\#14111](https://github.com/matrix-org/synapse/issues/14111))
- Add a `set_displayname()` method to the module API for setting a user's display name. ([\#14629](https://github.com/matrix-org/synapse/issues/14629))
- Add a dedicated listener configuration for `health` endpoint. ([\#14747](https://github.com/matrix-org/synapse/issues/14747))
- Implement support for [MSC3890](https://github.com/matrix-org/matrix-spec-proposals/pull/3890): Remotely silence local notifications. ([\#14775](https://github.com/matrix-org/synapse/issues/14775))
- Implement experimental support for [MSC3930](https://github.com/matrix-org/matrix-spec-proposals/pull/3930): Push rules for ([MSC3381](https://github.com/matrix-org/matrix-spec-proposals/pull/3381)) Polls. ([\#14787](https://github.com/matrix-org/synapse/issues/14787))
- Per [MSC3925](https://github.com/matrix-org/matrix-spec-proposals/pull/3925), bundle the whole of the replacement with any edited events, and optionally inhibit server-side replacement. ([\#14811](https://github.com/matrix-org/synapse/issues/14811))
- Faster joins: always serve a partial join response to servers that request it with the stable query param. ([\#14839](https://github.com/matrix-org/synapse/issues/14839))
- Faster joins: allow non-lazy-loading ("eager") syncs to complete after a partial join by omitting partial state rooms until they become fully stated. ([\#14870](https://github.com/matrix-org/synapse/issues/14870))
- Faster joins: request partial joins by default. Admins can opt-out of this for the time being---see the upgrade notes. ([\#14905](https://github.com/matrix-org/synapse/issues/14905))

Bugfixes
--------

- Add index to improve performance of the `/timestamp_to_event` endpoint used for jumping to a specific date in the timeline of a room. ([\#14799](https://github.com/matrix-org/synapse/issues/14799))
- Fix a long-standing bug where Synapse would exhaust the stack when processing many federation requests where the remote homeserver has disconencted early. ([\#14812](https://github.com/matrix-org/synapse/issues/14812), [\#14842](https://github.com/matrix-org/synapse/issues/14842))
- Fix rare races when using workers. ([\#14820](https://github.com/matrix-org/synapse/issues/14820))
- Fix a bug introduced in Synapse 1.64.0 when using room version 10 with frozen events enabled. ([\#14864](https://github.com/matrix-org/synapse/issues/14864))
- Fix a long-standing bug where the `populate_room_stats` background job could fail on broken rooms. ([\#14873](https://github.com/matrix-org/synapse/issues/14873))
- Faster joins: Fix a bug in worker deployments where the room stats and user directory would not get updated when finishing a fast join until another event is sent or received. ([\#14874](https://github.com/matrix-org/synapse/issues/14874))
- Faster joins: Fix incompatibility with joins into restricted rooms where no local users have the ability to invite. ([\#14882](https://github.com/matrix-org/synapse/issues/14882))
- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14910](https://github.com/matrix-org/synapse/issues/14910))

Updates to the Docker image
---------------------------

- Bump default Python version in the Dockerfile from 3.9 to 3.11. ([\#14875](https://github.com/matrix-org/synapse/issues/14875))

Improved Documentation
----------------------

- Include `x_forwarded` entry in the HTTP listener example configs and remove the remaining `worker_main_http_uri` entries. ([\#14667](https://github.com/matrix-org/synapse/issues/14667))
- Remove duplicate commands from the Code Style documentation page; point to the Contributing Guide instead. ([\#14773](https://github.com/matrix-org/synapse/issues/14773))
- Add missing documentation for `tag` to `listeners` section. ([\#14803](https://github.com/matrix-org/synapse/issues/14803))
- Updated documentation in configuration manual for `user_directory.search_all_users`. ([\#14818](https://github.com/matrix-org/synapse/issues/14818))
- Add `worker_manhole` to configuration manual. ([\#14824](https://github.com/matrix-org/synapse/issues/14824))
- Fix the example config missing the `id` field in [application service documentation](https://matrix-org.github.io/synapse/latest/application_services.html). ([\#14845](https://github.com/matrix-org/synapse/issues/14845))
- Minor corrections to the logging configuration documentation. ([\#14868](https://github.com/matrix-org/synapse/issues/14868))
- Document the export user data command. Contributed by @thezaidbintariq. ([\#14883](https://github.com/matrix-org/synapse/issues/14883))

Deprecations and Removals
-------------------------

- Poetry 1.3.2 or higher is now required when `poetry install`ing from source. ([\#14860](https://github.com/matrix-org/synapse/issues/14860))

Internal Changes
----------------

- Faster remote room joins (worker mode): do not populate external hosts-in-room cache when sending events as this requires blocking for full state. ([\#14749](https://github.com/matrix-org/synapse/issues/14749))
- Enable Complement tests for Faster Remote Room Joins against worker-mode Synapse. ([\#14752](https://github.com/matrix-org/synapse/issues/14752))
- Add some clarifying comments and refactor a portion of the `Keyring` class for readability. ([\#14804](https://github.com/matrix-org/synapse/issues/14804))
- Add local poetry config files (`poetry.toml`) to `.gitignore`. ([\#14807](https://github.com/matrix-org/synapse/issues/14807))
- Add missing type hints. ([\#14816](https://github.com/matrix-org/synapse/issues/14816), [\#14885](https://github.com/matrix-org/synapse/issues/14885), [\#14889](https://github.com/matrix-org/synapse/issues/14889))
- Refactor push tests. ([\#14819](https://github.com/matrix-org/synapse/issues/14819))
- Re-enable some linting that was disabled when we switched to ruff. ([\#14821](https://github.com/matrix-org/synapse/issues/14821))
- Add `cargo fmt` and `cargo clippy` to the lint script. ([\#14822](https://github.com/matrix-org/synapse/issues/14822))
- Drop unused table `presence`. ([\#14825](https://github.com/matrix-org/synapse/issues/14825))
- Merge the two account data and the two device list replication streams. ([\#14826](https://github.com/matrix-org/synapse/issues/14826), [\#14833](https://github.com/matrix-org/synapse/issues/14833))
- Faster joins: use stable identifiers from [MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706). ([\#14832](https://github.com/matrix-org/synapse/issues/14832), [\#14841](https://github.com/matrix-org/synapse/issues/14841))
- Add a parameter to control whether the federation client performs a partial state join. ([\#14843](https://github.com/matrix-org/synapse/issues/14843))
- Add check to avoid starting duplicate partial state syncs. ([\#14844](https://github.com/matrix-org/synapse/issues/14844))
- Add an early return when handling no-op presence updates. ([\#14855](https://github.com/matrix-org/synapse/issues/14855))
- Fix `wait_for_stream_position` to correctly wait for the right instance to advance its token. ([\#14856](https://github.com/matrix-org/synapse/issues/14856), [\#14872](https://github.com/matrix-org/synapse/issues/14872))
- Always notify replication when a stream advances automatically. ([\#14877](https://github.com/matrix-org/synapse/issues/14877))
- Reduce max time we wait for stream positions. ([\#14881](https://github.com/matrix-org/synapse/issues/14881))
- Faster joins: allow the resync process more time to fetch `/state` ids. ([\#14912](https://github.com/matrix-org/synapse/issues/14912))
- Bump regex from 1.7.0 to 1.7.1. ([\#14848](https://github.com/matrix-org/synapse/issues/14848))
- Bump peaceiris/actions-gh-pages from 3.9.1 to 3.9.2. ([\#14861](https://github.com/matrix-org/synapse/issues/14861))
- Bump ruff from 0.0.215 to 0.0.224. ([\#14862](https://github.com/matrix-org/synapse/issues/14862))
- Bump types-pillow from 9.4.0.0 to 9.4.0.3. ([\#14863](https://github.com/matrix-org/synapse/issues/14863))
- Bump types-opentracing from 2.4.10 to 2.4.10.1. ([\#14896](https://github.com/matrix-org/synapse/issues/14896))
- Bump ruff from 0.0.224 to 0.0.230. ([\#14897](https://github.com/matrix-org/synapse/issues/14897))
- Bump types-requests from 2.28.11.7 to 2.28.11.8. ([\#14899](https://github.com/matrix-org/synapse/issues/14899))
- Bump types-psycopg2 from 2.9.21.2 to 2.9.21.4. ([\#14900](https://github.com/matrix-org/synapse/issues/14900))
- Bump types-commonmark from 0.9.2 to 0.9.2.1. ([\#14901](https://github.com/matrix-org/synapse/issues/14901))

Synapse 1.76.0rc2 (2023-01-27)
==============================

The 1.76 release is the first to enable faster joins ([MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706) and [MSC3902](https://github.com/matrix-org/matrix-spec-proposals/pull/3902)) by default. Admins can opt-out: see [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/upgrade.md#faster-joins-are-enabled-by-default) for more details.

The upgrade from 1.75 to 1.76 changes the account data replication streams in a backwards-incompatible manner. Server operators running a multi-worker deployment should consult [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#changes-to-the-account-data-replication-streams).

Those who are `poetry install`ing from source using our lockfile should ensure their poetry version is 1.3.2 or higher; [see upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.76/docs/upgrade.md#minimum-version-of-poetry-is-now-132).

Bugfixes
--------

- Faster joins: Fix a bug introduced in Synapse 1.69 where device list EDUs could fail to be handled after a restart when a faster join sync is in progress. ([\#14914](https://github.com/matrix-org/synapse/issues/14914))

Internal Changes
----------------

- Faster joins: Improve performance of looking up partial-state status of rooms. ([\#14917](https://github.com/matrix-org/synapse/issues/14917))

Synapse 1.76.0rc1 (2023-01-25)
==============================

Features
--------

- Update the default room version to [v10](https://spec.matrix.org/v1.5/rooms/v10/) ([MSC 3904](https://github.com/matrix-org/matrix-spec-proposals/pull/3904)). Contributed by @FSG-Cat. ([\#14111](https://github.com/matrix-org/synapse/issues/14111))
- Adds a `set_displayname()` method to the module API for setting a user's display name. ([\#14629](https://github.com/matrix-org/synapse/issues/14629))
- Add a dedicated listener configuration for `health` endpoint. ([\#14747](https://github.com/matrix-org/synapse/issues/14747))
- Implement support for MSC3890: Remotely silence local notifications. ([\#14775](https://github.com/matrix-org/synapse/issues/14775))
- Implement experimental support for MSC3930: Push rules for (MSC3381) Polls. ([\#14787](https://github.com/matrix-org/synapse/issues/14787))
- Per [MSC3925](https://github.com/matrix-org/matrix-spec-proposals/pull/3925), bundle the whole of the replacement with any edited events, and optionally inhibit server-side replacement. ([\#14811](https://github.com/matrix-org/synapse/issues/14811))
- Faster joins: always serve a partial join response to servers that request it with the stable query param. ([\#14839](https://github.com/matrix-org/synapse/issues/14839))
- Faster joins: allow non-lazy-loading ("eager") syncs to complete after a partial join by omitting partial state rooms until they become fully stated. ([\#14870](https://github.com/matrix-org/synapse/issues/14870))
- Faster joins: request partial joins by default. Admins can opt-out of this for the time being---see the upgrade notes. ([\#14905](https://github.com/matrix-org/synapse/issues/14905))

Bugfixes
--------

- Add index to improve performance of the `/timestamp_to_event` endpoint used for jumping to a specific date in the timeline of a room. ([\#14799](https://github.com/matrix-org/synapse/issues/14799))
- Fix a long-standing bug where Synapse would exhaust the stack when processing many federation requests where the remote homeserver has disconencted early. ([\#14812](https://github.com/matrix-org/synapse/issues/14812), [\#14842](https://github.com/matrix-org/synapse/issues/14842))
- Fix rare races when using workers. ([\#14820](https://github.com/matrix-org/synapse/issues/14820))
- Fix a bug introduced in Synapse 1.64.0 when using room version 10 with frozen events enabled. ([\#14864](https://github.com/matrix-org/synapse/issues/14864))
- Fix a long-standing bug where the `populate_room_stats` background job could fail on broken rooms. ([\#14873](https://github.com/matrix-org/synapse/issues/14873))
- Faster joins: Fix a bug in worker deployments where the room stats and user directory would not get updated when finishing a fast join until another event is sent or received. ([\#14874](https://github.com/matrix-org/synapse/issues/14874))
- Faster joins: Fix incompatibility with joins into restricted rooms where no local users have the ability to invite. ([\#14882](https://github.com/matrix-org/synapse/issues/14882))
- Fix a regression introduced in Synapse 1.69.0 which can result in database corruption when database migrations are interrupted on sqlite. ([\#14910](https://github.com/matrix-org/synapse/issues/14910))

Updates to the Docker image
---------------------------

- Bump default Python version in the Dockerfile from 3.9 to 3.11. ([\#14875](https://github.com/matrix-org/synapse/issues/14875))

Improved Documentation
----------------------

- Include `x_forwarded` entry in the HTTP listener example configs and remove the remaining `worker_main_http_uri` entries. ([\#14667](https://github.com/matrix-org/synapse/issues/14667))
- Remove duplicate commands from the Code Style documentation page; point to the Contributing Guide instead. ([\#14773](https://github.com/matrix-org/synapse/issues/14773))
- Add missing documentation for `tag` to `listeners` section. ([\#14803](https://github.com/matrix-org/synapse/issues/14803))
- Updated documentation in configuration manual for `user_directory.search_all_users`. ([\#14818](https://github.com/matrix-org/synapse/issues/14818))
- Add `worker_manhole` to configuration manual. ([\#14824](https://github.com/matrix-org/synapse/issues/14824))
- Fix the example config missing the `id` field in [application service documentation](https://matrix-org.github.io/synapse/latest/application_services.html). ([\#14845](https://github.com/matrix-org/synapse/issues/14845))
- Minor corrections to the logging configuration documentation. ([\#14868](https://github.com/matrix-org/synapse/issues/14868))
- Document the export user data command. Contributed by @thezaidbintariq. ([\#14883](https://github.com/matrix-org/synapse/issues/14883))

Deprecations and Removals
-------------------------

- Poetry 1.3.2 or higher is now required when `poetry install`ing from source. ([\#14860](https://github.com/matrix-org/synapse/issues/14860))

Internal Changes
----------------

- Faster remote room joins (worker mode): do not populate external hosts-in-room cache when sending events as this requires blocking for full state. ([\#14749](https://github.com/matrix-org/synapse/issues/14749))
- Enable Complement tests for Faster Remote Room Joins against worker-mode Synapse. ([\#14752](https://github.com/matrix-org/synapse/issues/14752))
- Add some clarifying comments and refactor a portion of the `Keyring` class for readability. ([\#14804](https://github.com/matrix-org/synapse/issues/14804))
- Add local poetry config files (`poetry.toml`) to `.gitignore`. ([\#14807](https://github.com/matrix-org/synapse/issues/14807))
- Add missing type hints. ([\#14816](https://github.com/matrix-org/synapse/issues/14816), [\#14885](https://github.com/matrix-org/synapse/issues/14885), [\#14889](https://github.com/matrix-org/synapse/issues/14889))
- Refactor push tests. ([\#14819](https://github.com/matrix-org/synapse/issues/14819))
- Re-enable some linting that was disabled when we switched to ruff. ([\#14821](https://github.com/matrix-org/synapse/issues/14821))
- Add `cargo fmt` and `cargo clippy` to the lint script. ([\#14822](https://github.com/matrix-org/synapse/issues/14822))
- Drop unused table `presence`. ([\#14825](https://github.com/matrix-org/synapse/issues/14825))
- Merge the two account data and the two device list replication streams. ([\#14826](https://github.com/matrix-org/synapse/issues/14826), [\#14833](https://github.com/matrix-org/synapse/issues/14833))
- Faster joins: use stable identifiers from [MSC3706](https://github.com/matrix-org/matrix-spec-proposals/pull/3706). ([\#14832](https://github.com/matrix-org/synapse/issues/14832), [\#14841](https://github.com/matrix-org/synapse/issues/14841))
- Add a parameter to control whether the federation client performs a partial state join. ([\#14843](https://github.com/matrix-org/synapse/issues/14843))
- Add check to avoid starting duplicate partial state syncs. ([\#14844](https://github.com/matrix-org/synapse/issues/14844))
- Bump regex from 1.7.0 to 1.7.1. ([\#14848](https://github.com/matrix-org/synapse/issues/14848))
- Add an early return when handling no-op presence updates. ([\#14855](https://github.com/matrix-org/synapse/issues/14855))
- Fix `wait_for_stream_position` to correctly wait for the right instance to advance its token. ([\#14856](https://github.com/matrix-org/synapse/issues/14856), [\#14872](https://github.com/matrix-org/synapse/issues/14872))
- Bump peaceiris/actions-gh-pages from 3.9.1 to 3.9.2. ([\#14861](https://github.com/matrix-org/synapse/issues/14861))
- Bump ruff from 0.0.215 to 0.0.224. ([\#14862](https://github.com/matrix-org/synapse/issues/14862))
- Bump types-pillow from 9.4.0.0 to 9.4.0.3. ([\#14863](https://github.com/matrix-org/synapse/issues/14863))
- Always notify replication when a stream advances automatically. ([\#14877](https://github.com/matrix-org/synapse/issues/14877))
- Reduce max time we wait for stream positions. ([\#14881](https://github.com/matrix-org/synapse/issues/14881))
- Bump types-opentracing from 2.4.10 to 2.4.10.1. ([\#14896](https://github.com/matrix-org/synapse/issues/14896))
- Bump ruff from 0.0.224 to 0.0.230. ([\#14897](https://github.com/matrix-org/synapse/issues/14897))
- Bump types-requests from 2.28.11.7 to 2.28.11.8. ([\#14899](https://github.com/matrix-org/synapse/issues/14899))
- Bump types-psycopg2 from 2.9.21.2 to 2.9.21.4. ([\#14900](https://github.com/matrix-org/synapse/issues/14900))
- Bump types-commonmark from 0.9.2 to 0.9.2.1. ([\#14901](https://github.com/matrix-org/synapse/issues/14901))
- Faster joins: allow the resync process more time to fetch `/state` ids. ([\#14912](https://github.com/matrix-org/synapse/issues/14912))

Synapse 1.75.0 (2023-01-17)
===========================

No significant changes since 1.75.0rc2.

Synapse 1.75.0rc2 (2023-01-12)
==============================

Bugfixes
--------

- Fix a bug introduced in Synapse 1.75.0rc1 where device lists could be miscalculated with some sync filters. ([\#14810](https://github.com/matrix-org/synapse/issues/14810))
- Fix race where calling `/members` or `/state` with an `at` parameter could fail for newly created rooms, when using multiple workers. ([\#14817](https://github.com/matrix-org/synapse/issues/14817))

Synapse 1.75.0rc1 (2023-01-10)
==============================

Features
--------

- Add a `cached` function to `synapse.module_api` that returns a decorator to cache return values of functions. ([\#14663](https://github.com/matrix-org/synapse/issues/14663))
- Add experimental support for [MSC3391](https://github.com/matrix-org/matrix-spec-proposals/pull/3391) (removing account data). ([\#14714](https://github.com/matrix-org/synapse/issues/14714))
- Support [RFC7636](https://datatracker.ietf.org/doc/html/rfc7636) Proof Key for Code Exchange for OAuth single sign-on. ([\#14750](https://github.com/matrix-org/synapse/issues/14750))
- Support non-OpenID compliant userinfo claims for subject and picture. ([\#14753](https://github.com/matrix-org/synapse/issues/14753))
- Improve performance of `/sync` when filtering all rooms, message types, or senders. ([\#14786](https://github.com/matrix-org/synapse/issues/14786))
- Improve performance of the `/hierarchy` endpoint. ([\#14263](https://github.com/matrix-org/synapse/issues/14263))

Bugfixes
--------

- Fix the *MAU Limits* section of the Grafana dashboard relying on a specific `job` name for the workers of a Synapse deployment. ([\#14644](https://github.com/matrix-org/synapse/issues/14644))
- Fix a bug introduced in Synapse 1.70.0 which could cause spurious `UNIQUE constraint failed` errors in the `rotate_notifs` background job. ([\#14669](https://github.com/matrix-org/synapse/issues/14669))
- Ensure stream IDs are always updated after caches get invalidated with workers. Contributed by Nick @ Beeper (@fizzadar). ([\#14723](https://github.com/matrix-org/synapse/issues/14723))
- Remove the unspecced `device` field from `/pushrules` responses. ([\#14727](https://github.com/matrix-org/synapse/issues/14727))
- Fix a bug introduced in Synapse 1.73.0 where the `picture_claim` configured under `oidc_providers` was unused (the default value of `"picture"` was used instead). ([\#14751](https://github.com/matrix-org/synapse/issues/14751))
- Unescape HTML entities in URL preview titles making use of oEmbed responses. ([\#14781](https://github.com/matrix-org/synapse/issues/14781))
- Disable sending confirmation email when 3pid is disabled. ([\#14725](https://github.com/matrix-org/synapse/issues/14725))

Improved Documentation
----------------------

- Declare support for Python 3.11. ([\#14673](https://github.com/matrix-org/synapse/issues/14673))
- Fix `target_memory_usage` being used in the description for the actual `cache_autotune` sub-option `target_cache_memory_usage`. ([\#14674](https://github.com/matrix-org/synapse/issues/14674))
- Move `email` to Server section in config file documentation. ([\#14730](https://github.com/matrix-org/synapse/issues/14730))
- Fix broken links in the Synapse documentation. ([\#14744](https://github.com/matrix-org/synapse/issues/14744))
- Add missing worker settings to shared configuration documentation. ([\#14748](https://github.com/matrix-org/synapse/issues/14748))
- Document using Twitter as a OAuth 2.0 authentication provider. ([\#14778](https://github.com/matrix-org/synapse/issues/14778))
- Fix Synapse 1.74 upgrade notes to correctly explain how to install pyICU when installing Synapse from PyPI. ([\#14797](https://github.com/matrix-org/synapse/issues/14797))
- Update link to towncrier in contribution guide. ([\#14801](https://github.com/matrix-org/synapse/issues/14801))
- Use `htmltest` to check links in the Synapse documentation. ([\#14743](https://github.com/matrix-org/synapse/issues/14743))

Internal Changes
----------------

- Faster remote room joins: stream the un-partial-stating of events over replication. ([\#14545](https://github.com/matrix-org/synapse/issues/14545), [\#14546](https://github.com/matrix-org/synapse/issues/14546))
- Use [ruff](https://github.com/charliermarsh/ruff/) instead of flake8. ([\#14633](https://github.com/matrix-org/synapse/issues/14633), [\#14741](https://github.com/matrix-org/synapse/issues/14741))
- Change `handle_new_client_event` signature so that a 429 does not reach clients on `PartialStateConflictError`, and internally retry when needed instead. ([\#14665](https://github.com/matrix-org/synapse/issues/14665))
- Remove dependency on jQuery on reCAPTCHA page. ([\#14672](https://github.com/matrix-org/synapse/issues/14672))
- Faster joins: make `compute_state_after_events` consistent with other state-fetching functions that take a `StateFilter`. ([\#14676](https://github.com/matrix-org/synapse/issues/14676))
- Add missing type hints. ([\#14680](https://github.com/matrix-org/synapse/issues/14680), [\#14681](https://github.com/matrix-org/synapse/issues/14681), [\#14687](https://github.com/matrix-org/synapse/issues/14687))
- Improve type annotations for the helper methods on a `CachedFunction`. ([\#14685](https://github.com/matrix-org/synapse/issues/14685))
- Check that the SQLite database file exists before porting to PostgreSQL. ([\#14692](https://github.com/matrix-org/synapse/issues/14692))
- Add `.direnv/` directory to .gitignore to prevent local state generated by the [direnv](https://direnv.net/) development tool from being committed. ([\#14707](https://github.com/matrix-org/synapse/issues/14707))
- Batch up replication requests to request the resyncing of remote users's devices. ([\#14716](https://github.com/matrix-org/synapse/issues/14716))
- If debug logging is enabled, log the `msgid`s of any to-device messages that are returned over `/sync`. ([\#14724](https://github.com/matrix-org/synapse/issues/14724))
- Change GHA CI job to follow best practices. ([\#14772](https://github.com/matrix-org/synapse/issues/14772))
- Switch to our fork of `dh-virtualenv` to work around an upstream Python 3.11 incompatibility. ([\#14774](https://github.com/matrix-org/synapse/issues/14774))
- Skip testing built wheels for PyPy 3.7 on Linux x86_64 as we lack new required dependencies in the build environment. ([\#14802](https://github.com/matrix-org/synapse/issues/14802))

<details>

- Bump JasonEtco/create-an-issue from 2.8.1 to 2.8.2. ([\#14693](https://github.com/matrix-org/synapse/issues/14693))
- Bump anyhow from 1.0.66 to 1.0.68. ([\#14694](https://github.com/matrix-org/synapse/issues/14694))
- Bump blake2 from 0.10.5 to 0.10.6. ([\#14695](https://github.com/matrix-org/synapse/issues/14695))
- Bump serde_json from 1.0.89 to 1.0.91. ([\#14696](https://github.com/matrix-org/synapse/issues/14696))
- Bump serde from 1.0.150 to 1.0.151. ([\#14697](https://github.com/matrix-org/synapse/issues/14697))
- Bump lxml from 4.9.1 to 4.9.2. ([\#14698](https://github.com/matrix-org/synapse/issues/14698))
- Bump types-jsonschema from 4.17.0.1 to 4.17.0.2. ([\#14700](https://github.com/matrix-org/synapse/issues/14700))
- Bump sentry-sdk from 1.11.1 to 1.12.0. ([\#14701](https://github.com/matrix-org/synapse/issues/14701))
- Bump types-setuptools from 65.6.0.1 to 65.6.0.2. ([\#14702](https://github.com/matrix-org/synapse/issues/14702))
- Bump minimum PyYAML to 3.13. ([\#14720](https://github.com/matrix-org/synapse/issues/14720))
- Bump JasonEtco/create-an-issue from 2.8.2 to 2.9.1. ([\#14731](https://github.com/matrix-org/synapse/issues/14731))
- Bump towncrier from 22.8.0 to 22.12.0. ([\#14732](https://github.com/matrix-org/synapse/issues/14732))
- Bump isort from 5.10.1 to 5.11.4. ([\#14733](https://github.com/matrix-org/synapse/issues/14733))
- Bump attrs from 22.1.0 to 22.2.0. ([\#14734](https://github.com/matrix-org/synapse/issues/14734))
- Bump black from 22.10.0 to 22.12.0. ([\#14735](https://github.com/matrix-org/synapse/issues/14735))
- Bump sentry-sdk from 1.12.0 to 1.12.1. ([\#14736](https://github.com/matrix-org/synapse/issues/14736))
- Bump setuptools from 65.3.0 to 65.5.1. ([\#14738](https://github.com/matrix-org/synapse/issues/14738))
- Bump serde from 1.0.151 to 1.0.152. ([\#14758](https://github.com/matrix-org/synapse/issues/14758))
- Bump ruff from 0.0.189 to 0.0.206. ([\#14759](https://github.com/matrix-org/synapse/issues/14759))
- Bump pydantic from 1.10.2 to 1.10.4. ([\#14760](https://github.com/matrix-org/synapse/issues/14760))
- Bump gitpython from 3.1.29 to 3.1.30. ([\#14761](https://github.com/matrix-org/synapse/issues/14761))
- Bump pillow from 9.3.0 to 9.4.0. ([\#14762](https://github.com/matrix-org/synapse/issues/14762))
- Bump types-requests from 2.28.11.5 to 2.28.11.7. ([\#14763](https://github.com/matrix-org/synapse/issues/14763))
- Bump dawidd6/action-download-artifact from 2.24.2 to 2.24.3. ([\#14779](https://github.com/matrix-org/synapse/issues/14779))
- Bump peaceiris/actions-gh-pages from 3.9.0 to 3.9.1. ([\#14791](https://github.com/matrix-org/synapse/issues/14791))
- Bump types-pillow from 9.3.0.4 to 9.4.0.0. ([\#14792](https://github.com/matrix-org/synapse/issues/14792))
- Bump pyopenssl from 22.1.0 to 23.0.0. ([\#14793](https://github.com/matrix-org/synapse/issues/14793))
- Bump types-setuptools from 65.6.0.2 to 65.6.0.3. ([\#14794](https://github.com/matrix-org/synapse/issues/14794))
- Bump importlib-metadata from 4.2.0 to 6.0.0. ([\#14795](https://github.com/matrix-org/synapse/issues/14795))
- Bump ruff from 0.0.206 to 0.0.215. ([\#14796](https://github.com/matrix-org/synapse/issues/14796))
</details>

Synapse 1.75.0rc2 (2023-01-12)
==============================

Bugfixes
--------

- Fix a bug introduced in Synapse 1.75.0rc1 where device lists could be miscalculated with some sync filters. ([\#14810](https://github.com/matrix-org/synapse/issues/14810))
- Fix race where calling `/members` or `/state` with an `at` parameter could fail for newly created rooms, when using multiple workers. ([\#14817](https://github.com/matrix-org/synapse/issues/14817))

Synapse 1.75.0rc1 (2023-01-10)
==============================

Features
--------

- Add a `cached` function to `synapse.module_api` that returns a decorator to cache return values of functions. ([\#14663](https://github.com/matrix-org/synapse/issues/14663))
- Add experimental support for [MSC3391](https://github.com/matrix-org/matrix-spec-proposals/pull/3391) (removing account data). ([\#14714](https://github.com/matrix-org/synapse/issues/14714))
- Support [RFC7636](https://datatracker.ietf.org/doc/html/rfc7636) Proof Key for Code Exchange for OAuth single sign-on. ([\#14750](https://github.com/matrix-org/synapse/issues/14750))
- Support non-OpenID compliant userinfo claims for subject and picture. ([\#14753](https://github.com/matrix-org/synapse/issues/14753))
- Improve performance of `/sync` when filtering all rooms, message types, or senders. ([\#14786](https://github.com/matrix-org/synapse/issues/14786))
- Improve performance of the `/hierarchy` endpoint. ([\#14263](https://github.com/matrix-org/synapse/issues/14263))

Bugfixes
--------

- Fix the *MAU Limits* section of the Grafana dashboard relying on a specific `job` name for the workers of a Synapse deployment. ([\#14644](https://github.com/matrix-org/synapse/issues/14644))
- Fix a bug introduced in Synapse 1.70.0 which could cause spurious `UNIQUE constraint failed` errors in the `rotate_notifs` background job. ([\#14669](https://github.com/matrix-org/synapse/issues/14669))
- Ensure stream IDs are always updated after caches get invalidated with workers. Contributed by Nick @ Beeper (@fizzadar). ([\#14723](https://github.com/matrix-org/synapse/issues/14723))
- Remove the unspecced `device` field from `/pushrules` responses. ([\#14727](https://github.com/matrix-org/synapse/issues/14727))
- Fix a bug introduced in Synapse 1.73.0 where the `picture_claim` configured under `oidc_providers` was unused (the default value of `"picture"` was used instead). ([\#14751](https://github.com/matrix-org/synapse/issues/14751))
- Unescape HTML entities in URL preview titles making use of oEmbed responses. ([\#14781](https://github.com/matrix-org/synapse/issues/14781))
- Disable sending confirmation email when 3pid is disabled. ([\#14725](https://github.com/matrix-org/synapse/issues/14725))

Improved Documentation
----------------------

- Declare support for Python 3.11. ([\#14673](https://github.com/matrix-org/synapse/issues/14673))
- Fix `target_memory_usage` being used in the description for the actual `cache_autotune` sub-option `target_cache_memory_usage`. ([\#14674](https://github.com/matrix-org/synapse/issues/14674))
- Move `email` to Server section in config file documentation. ([\#14730](https://github.com/matrix-org/synapse/issues/14730))
- Fix broken links in the Synapse documentation. ([\#14744](https://github.com/matrix-org/synapse/issues/14744))
- Add missing worker settings to shared configuration documentation. ([\#14748](https://github.com/matrix-org/synapse/issues/14748))
- Document using Twitter as a OAuth 2.0 authentication provider. ([\#14778](https://github.com/matrix-org/synapse/issues/14778))
- Fix Synapse 1.74 upgrade notes to correctly explain how to install pyICU when installing Synapse from PyPI. ([\#14797](https://github.com/matrix-org/synapse/issues/14797))
- Update link to towncrier in contribution guide. ([\#14801](https://github.com/matrix-org/synapse/issues/14801))
- Use `htmltest` to check links in the Synapse documentation. ([\#14743](https://github.com/matrix-org/synapse/issues/14743))

Internal Changes
----------------

- Faster remote room joins: stream the un-partial-stating of events over replication. ([\#14545](https://github.com/matrix-org/synapse/issues/14545), [\#14546](https://github.com/matrix-org/synapse/issues/14546))
- Use [ruff](https://github.com/charliermarsh/ruff/) instead of flake8. ([\#14633](https://github.com/matrix-org/synapse/issues/14633), [\#14741](https://github.com/matrix-org/synapse/issues/14741))
- Change `handle_new_client_event` signature so that a 429 does not reach clients on `PartialStateConflictError`, and internally retry when needed instead. ([\#14665](https://github.com/matrix-org/synapse/issues/14665))
- Remove dependency on jQuery on reCAPTCHA page. ([\#14672](https://github.com/matrix-org/synapse/issues/14672))
- Faster joins: make `compute_state_after_events` consistent with other state-fetching functions that take a `StateFilter`. ([\#14676](https://github.com/matrix-org/synapse/issues/14676))
- Add missing type hints. ([\#14680](https://github.com/matrix-org/synapse/issues/14680), [\#14681](https://github.com/matrix-org/synapse/issues/14681), [\#14687](https://github.com/matrix-org/synapse/issues/14687))
- Improve type annotations for the helper methods on a `CachedFunction`. ([\#14685](https://github.com/matrix-org/synapse/issues/14685))
- Check that the SQLite database file exists before porting to PostgreSQL. ([\#14692](https://github.com/matrix-org/synapse/issues/14692))
- Add `.direnv/` directory to .gitignore to prevent local state generated by the [direnv](https://direnv.net/) development tool from being committed. ([\#14707](https://github.com/matrix-org/synapse/issues/14707))
- Batch up replication requests to request the resyncing of remote users's devices. ([\#14716](https://github.com/matrix-org/synapse/issues/14716))
- If debug logging is enabled, log the `msgid`s of any to-device messages that are returned over `/sync`. ([\#14724](https://github.com/matrix-org/synapse/issues/14724))
- Change GHA CI job to follow best practices. ([\#14772](https://github.com/matrix-org/synapse/issues/14772))
- Switch to our fork of `dh-virtualenv` to work around an upstream Python 3.11 incompatibility. ([\#14774](https://github.com/matrix-org/synapse/issues/14774))
- Skip testing built wheels for PyPy 3.7 on Linux x86_64 as we lack new required dependencies in the build environment. ([\#14802](https://github.com/matrix-org/synapse/issues/14802))

<details>

- Bump JasonEtco/create-an-issue from 2.8.1 to 2.8.2. ([\#14693](https://github.com/matrix-org/synapse/issues/14693))
- Bump anyhow from 1.0.66 to 1.0.68. ([\#14694](https://github.com/matrix-org/synapse/issues/14694))
- Bump blake2 from 0.10.5 to 0.10.6. ([\#14695](https://github.com/matrix-org/synapse/issues/14695))
- Bump serde_json from 1.0.89 to 1.0.91. ([\#14696](https://github.com/matrix-org/synapse/issues/14696))
- Bump serde from 1.0.150 to 1.0.151. ([\#14697](https://github.com/matrix-org/synapse/issues/14697))
- Bump lxml from 4.9.1 to 4.9.2. ([\#14698](https://github.com/matrix-org/synapse/issues/14698))
- Bump types-jsonschema from 4.17.0.1 to 4.17.0.2. ([\#14700](https://github.com/matrix-org/synapse/issues/14700))
- Bump sentry-sdk from 1.11.1 to 1.12.0. ([\#14701](https://github.com/matrix-org/synapse/issues/14701))
- Bump types-setuptools from 65.6.0.1 to 65.6.0.2. ([\#14702](https://github.com/matrix-org/synapse/issues/14702))
- Bump minimum PyYAML to 3.13. ([\#14720](https://github.com/matrix-org/synapse/issues/14720))
- Bump JasonEtco/create-an-issue from 2.8.2 to 2.9.1. ([\#14731](https://github.com/matrix-org/synapse/issues/14731))
- Bump towncrier from 22.8.0 to 22.12.0. ([\#14732](https://github.com/matrix-org/synapse/issues/14732))
- Bump isort from 5.10.1 to 5.11.4. ([\#14733](https://github.com/matrix-org/synapse/issues/14733))
- Bump attrs from 22.1.0 to 22.2.0. ([\#14734](https://github.com/matrix-org/synapse/issues/14734))
- Bump black from 22.10.0 to 22.12.0. ([\#14735](https://github.com/matrix-org/synapse/issues/14735))
- Bump sentry-sdk from 1.12.0 to 1.12.1. ([\#14736](https://github.com/matrix-org/synapse/issues/14736))
- Bump setuptools from 65.3.0 to 65.5.1. ([\#14738](https://github.com/matrix-org/synapse/issues/14738))
- Bump serde from 1.0.151 to 1.0.152. ([\#14758](https://github.com/matrix-org/synapse/issues/14758))
- Bump ruff from 0.0.189 to 0.0.206. ([\#14759](https://github.com/matrix-org/synapse/issues/14759))
- Bump pydantic from 1.10.2 to 1.10.4. ([\#14760](https://github.com/matrix-org/synapse/issues/14760))
- Bump gitpython from 3.1.29 to 3.1.30. ([\#14761](https://github.com/matrix-org/synapse/issues/14761))
- Bump pillow from 9.3.0 to 9.4.0. ([\#14762](https://github.com/matrix-org/synapse/issues/14762))
- Bump types-requests from 2.28.11.5 to 2.28.11.7. ([\#14763](https://github.com/matrix-org/synapse/issues/14763))
- Bump dawidd6/action-download-artifact from 2.24.2 to 2.24.3. ([\#14779](https://github.com/matrix-org/synapse/issues/14779))
- Bump peaceiris/actions-gh-pages from 3.9.0 to 3.9.1. ([\#14791](https://github.com/matrix-org/synapse/issues/14791))
- Bump types-pillow from 9.3.0.4 to 9.4.0.0. ([\#14792](https://github.com/matrix-org/synapse/issues/14792))
- Bump pyopenssl from 22.1.0 to 23.0.0. ([\#14793](https://github.com/matrix-org/synapse/issues/14793))
- Bump types-setuptools from 65.6.0.2 to 65.6.0.3. ([\#14794](https://github.com/matrix-org/synapse/issues/14794))
- Bump importlib-metadata from 4.2.0 to 6.0.0. ([\#14795](https://github.com/matrix-org/synapse/issues/14795))
- Bump ruff from 0.0.206 to 0.0.215. ([\#14796](https://github.com/matrix-org/synapse/issues/14796))
</details>

Synapse 1.74.0 (2022-12-20)
===========================

Improved Documentation
----------------------

- Add release note and update documentation regarding optional ICU support in user search. ([\#14712](https://github.com/matrix-org/synapse/issues/14712))

Synapse 1.74.0rc1 (2022-12-13)
==============================

Features
--------

- Improve user search for international display names. ([\#14464](https://github.com/matrix-org/synapse/issues/14464))
- Stop using deprecated `keyIds` parameter when calling `/_matrix/key/v2/server`. ([\#14490](https://github.com/matrix-org/synapse/issues/14490), [\#14525](https://github.com/matrix-org/synapse/issues/14525))
- Add new `push.enabled` config option to allow opting out of push notification calculation. ([\#14551](https://github.com/matrix-org/synapse/issues/14551), [\#14619](https://github.com/matrix-org/synapse/issues/14619))
- Advertise support for Matrix 1.5 on `/_matrix/client/versions`. ([\#14576](https://github.com/matrix-org/synapse/issues/14576))
- Improve opentracing and logging for to-device message handling. ([\#14598](https://github.com/matrix-org/synapse/issues/14598))
- Allow selecting "prejoin" events by state keys in addition to event types. ([\#14642](https://github.com/matrix-org/synapse/issues/14642))

Bugfixes
--------

- Fix a long-standing bug where a device list update might not be sent to clients in certain circumstances. ([\#14435](https://github.com/matrix-org/synapse/issues/14435), [\#14592](https://github.com/matrix-org/synapse/issues/14592), [\#14604](https://github.com/matrix-org/synapse/issues/14604))
- Suppress a spurious warning when `POST /rooms/<room_id>/<membership>/`, `POST /join/<room_id_or_alias`, or the unspecced `PUT /join/<room_id_or_alias>/<txn_id>` receive an empty HTTP request body. ([\#14600](https://github.com/matrix-org/synapse/issues/14600))
- Return spec-compliant JSON errors when unknown endpoints are requested. ([\#14620](https://github.com/matrix-org/synapse/issues/14620), [\#14621](https://github.com/matrix-org/synapse/issues/14621))
- Update html templates to load images over HTTPS. Contributed by @ashfame. ([\#14625](https://github.com/matrix-org/synapse/issues/14625))
- Fix a long-standing bug where the user directory would return 1 more row than requested. ([\#14631](https://github.com/matrix-org/synapse/issues/14631))
- Reject invalid read receipt requests with empty room or event IDs. Contributed by Nick @ Beeper (@fizzadar). ([\#14632](https://github.com/matrix-org/synapse/issues/14632))
- Fix a bug introduced in Synapse 1.67.0 where not specifying a config file or a server URL would lead to the `register_new_matrix_user` script failing. ([\#14637](https://github.com/matrix-org/synapse/issues/14637))
- Fix a long-standing bug where the user directory and room/user stats might be out of sync. ([\#14639](https://github.com/matrix-org/synapse/issues/14639), [\#14643](https://github.com/matrix-org/synapse/issues/14643))
- Fix a bug introduced in Synapse 1.72.0 where the background updates to add non-thread unique indexes on receipts would fail if they were previously interrupted. ([\#14650](https://github.com/matrix-org/synapse/issues/14650))
- Improve validation of field size limits in events. ([\#14664](https://github.com/matrix-org/synapse/issues/14664))
- Fix bugs introduced in Synapse 1.55.0 and 1.69.0 where application services would not be notified of events in the correct rooms, due to stale caches. ([\#14670](https://github.com/matrix-org/synapse/issues/14670))

Improved Documentation
----------------------

- Update worker settings for `pusher` and `federation_sender` functionality. ([\#14493](https://github.com/matrix-org/synapse/issues/14493))
- Add links to third party package repositories, and point to the bug which highlights Ubuntu's out-of-date packages. ([\#14517](https://github.com/matrix-org/synapse/issues/14517))
- Remove old, incorrect minimum postgres version note and replace with a link to the [Dependency Deprecation Policy](https://matrix-org.github.io/synapse/v1.73/deprecation_policy.html). ([\#14590](https://github.com/matrix-org/synapse/issues/14590))
- Add Single-Sign On setup instructions for Mastodon-based instances. ([\#14594](https://github.com/matrix-org/synapse/issues/14594))
- Change `turn_allow_guests` example value to lowercase `true`. ([\#14634](https://github.com/matrix-org/synapse/issues/14634))

Internal Changes
----------------

- Optimise push badge count calculations. Contributed by Nick @ Beeper (@fizzadar). ([\#14255](https://github.com/matrix-org/synapse/issues/14255))
- Faster remote room joins: stream the un-partial-stating of rooms over replication. ([\#14473](https://github.com/matrix-org/synapse/issues/14473), [\#14474](https://github.com/matrix-org/synapse/issues/14474))
- Share the `ClientRestResource` for both workers and the main process. ([\#14528](https://github.com/matrix-org/synapse/issues/14528))
- Add `--editable` flag to `complement.sh` which uses an editable install of Synapse for faster turn-around times whilst developing iteratively. ([\#14548](https://github.com/matrix-org/synapse/issues/14548))
- Faster joins: use servers list approximation to send read receipts when in partial state instead of waiting for the full state of the room. ([\#14549](https://github.com/matrix-org/synapse/issues/14549))
- Modernize unit tests configuration related to workers. ([\#14568](https://github.com/matrix-org/synapse/issues/14568))
- Bump jsonschema from 4.17.0 to 4.17.3. ([\#14591](https://github.com/matrix-org/synapse/issues/14591))
- Fix Rust lint CI. ([\#14602](https://github.com/matrix-org/synapse/issues/14602))
- Bump JasonEtco/create-an-issue from 2.5.0 to 2.8.1. ([\#14607](https://github.com/matrix-org/synapse/issues/14607))
- Alter some unit test environment parameters to decrease time spent running tests. ([\#14610](https://github.com/matrix-org/synapse/issues/14610))
- Switch to Go recommended installation method for `gotestfmt` template in CI. ([\#14611](https://github.com/matrix-org/synapse/issues/14611))
- Bump phonenumbers from 8.13.0 to 8.13.1. ([\#14612](https://github.com/matrix-org/synapse/issues/14612))
- Bump types-setuptools from 65.5.0.3 to 65.6.0.1. ([\#14613](https://github.com/matrix-org/synapse/issues/14613))
- Bump twine from 4.0.1 to 4.0.2. ([\#14614](https://github.com/matrix-org/synapse/issues/14614))
- Bump types-requests from 2.28.11.2 to 2.28.11.5. ([\#14615](https://github.com/matrix-org/synapse/issues/14615))
- Bump cryptography from 38.0.3 to 38.0.4. ([\#14616](https://github.com/matrix-org/synapse/issues/14616))
- Remove useless cargo install with apt from Dockerfile. ([\#14636](https://github.com/matrix-org/synapse/issues/14636))
- Bump certifi from 2021.10.8 to 2022.12.7. ([\#14645](https://github.com/matrix-org/synapse/issues/14645))
- Bump flake8-bugbear from 22.10.27 to 22.12.6. ([\#14656](https://github.com/matrix-org/synapse/issues/14656))
- Bump packaging from 21.3 to 22.0. ([\#14657](https://github.com/matrix-org/synapse/issues/14657))
- Bump types-pillow from 9.3.0.1 to 9.3.0.4. ([\#14658](https://github.com/matrix-org/synapse/issues/14658))
- Bump serde from 1.0.148 to 1.0.150. ([\#14659](https://github.com/matrix-org/synapse/issues/14659))
- Bump phonenumbers from 8.13.1 to 8.13.2. ([\#14660](https://github.com/matrix-org/synapse/issues/14660))
- Bump authlib from 1.1.0 to 1.2.0. ([\#14661](https://github.com/matrix-org/synapse/issues/14661))
- Move `StateFilter` to `synapse.types`. ([\#14668](https://github.com/matrix-org/synapse/issues/14668))
- Improve type hints. ([\#14597](https://github.com/matrix-org/synapse/issues/14597), [\#14646](https://github.com/matrix-org/synapse/issues/14646), [\#14671](https://github.com/matrix-org/synapse/issues/14671))

Synapse 1.74.0rc1 (2022-12-13)
==============================

Features
--------

- Improve user search for international display names. ([\#14464](https://github.com/matrix-org/synapse/issues/14464))
- Stop using deprecated `keyIds` parameter when calling `/_matrix/key/v2/server`. ([\#14490](https://github.com/matrix-org/synapse/issues/14490), [\#14525](https://github.com/matrix-org/synapse/issues/14525))
- Add new `push.enabled` config option to allow opting out of push notification calculation. ([\#14551](https://github.com/matrix-org/synapse/issues/14551), [\#14619](https://github.com/matrix-org/synapse/issues/14619))
- Advertise support for Matrix 1.5 on `/_matrix/client/versions`. ([\#14576](https://github.com/matrix-org/synapse/issues/14576))
- Improve opentracing and logging for to-device message handling. ([\#14598](https://github.com/matrix-org/synapse/issues/14598))
- Allow selecting "prejoin" events by state keys in addition to event types. ([\#14642](https://github.com/matrix-org/synapse/issues/14642))

Bugfixes
--------

- Fix a long-standing bug where a device list update might not be sent to clients in certain circumstances. ([\#14435](https://github.com/matrix-org/synapse/issues/14435), [\#14592](https://github.com/matrix-org/synapse/issues/14592), [\#14604](https://github.com/matrix-org/synapse/issues/14604))
- Suppress a spurious warning when `POST /rooms/<room_id>/<membership>/`, `POST /join/<room_id_or_alias`, or the unspecced `PUT /join/<room_id_or_alias>/<txn_id>` receive an empty HTTP request body. ([\#14600](https://github.com/matrix-org/synapse/issues/14600))
- Return spec-compliant JSON errors when unknown endpoints are requested. ([\#14620](https://github.com/matrix-org/synapse/issues/14620), [\#14621](https://github.com/matrix-org/synapse/issues/14621))
- Update html templates to load images over HTTPS. Contributed by @ashfame. ([\#14625](https://github.com/matrix-org/synapse/issues/14625))
- Fix a long-standing bug where the user directory would return 1 more row than requested. ([\#14631](https://github.com/matrix-org/synapse/issues/14631))
- Reject invalid read receipt requests with empty room or event IDs. Contributed by Nick @ Beeper (@fizzadar). ([\#14632](https://github.com/matrix-org/synapse/issues/14632))
- Fix a bug introduced in Synapse 1.67.0 where not specifying a config file or a server URL would lead to the `register_new_matrix_user` script failing. ([\#14637](https://github.com/matrix-org/synapse/issues/14637))
- Fix a long-standing bug where the user directory and room/user stats might be out of sync. ([\#14639](https://github.com/matrix-org/synapse/issues/14639), [\#14643](https://github.com/matrix-org/synapse/issues/14643))
- Fix a bug introduced in Synapse 1.72.0 where the background updates to add non-thread unique indexes on receipts would fail if they were previously interrupted. ([\#14650](https://github.com/matrix-org/synapse/issues/14650))
- Improve validation of field size limits in events. ([\#14664](https://github.com/matrix-org/synapse/issues/14664))
- Fix bugs introduced in Synapse 1.55.0 and 1.69.0 where application services would not be notified of events in the correct rooms, due to stale caches. ([\#14670](https://github.com/matrix-org/synapse/issues/14670))

Improved Documentation
----------------------

- Update worker settings for `pusher` and `federation_sender` functionality. ([\#14493](https://github.com/matrix-org/synapse/issues/14493))
- Add links to third party package repositories, and point to the bug which highlights Ubuntu's out-of-date packages. ([\#14517](https://github.com/matrix-org/synapse/issues/14517))
- Remove old, incorrect minimum postgres version note and replace with a link to the [Dependency Deprecation Policy](https://matrix-org.github.io/synapse/v1.73/deprecation_policy.html). ([\#14590](https://github.com/matrix-org/synapse/issues/14590))
- Add Single-Sign On setup instructions for Mastodon-based instances. ([\#14594](https://github.com/matrix-org/synapse/issues/14594))
- Change `turn_allow_guests` example value to lowercase `true`. ([\#14634](https://github.com/matrix-org/synapse/issues/14634))

Internal Changes
----------------

- Optimise push badge count calculations. Contributed by Nick @ Beeper (@fizzadar). ([\#14255](https://github.com/matrix-org/synapse/issues/14255))
- Faster remote room joins: stream the un-partial-stating of rooms over replication. ([\#14473](https://github.com/matrix-org/synapse/issues/14473), [\#14474](https://github.com/matrix-org/synapse/issues/14474))
- Share the `ClientRestResource` for both workers and the main process. ([\#14528](https://github.com/matrix-org/synapse/issues/14528))
- Add `--editable` flag to `complement.sh` which uses an editable install of Synapse for faster turn-around times whilst developing iteratively. ([\#14548](https://github.com/matrix-org/synapse/issues/14548))
- Faster joins: use servers list approximation to send read receipts when in partial state instead of waiting for the full state of the room. ([\#14549](https://github.com/matrix-org/synapse/issues/14549))
- Modernize unit tests configuration related to workers. ([\#14568](https://github.com/matrix-org/synapse/issues/14568))
- Bump jsonschema from 4.17.0 to 4.17.3. ([\#14591](https://github.com/matrix-org/synapse/issues/14591))
- Fix Rust lint CI. ([\#14602](https://github.com/matrix-org/synapse/issues/14602))
- Bump JasonEtco/create-an-issue from 2.5.0 to 2.8.1. ([\#14607](https://github.com/matrix-org/synapse/issues/14607))
- Alter some unit test environment parameters to decrease time spent running tests. ([\#14610](https://github.com/matrix-org/synapse/issues/14610))
- Switch to Go recommended installation method for `gotestfmt` template in CI. ([\#14611](https://github.com/matrix-org/synapse/issues/14611))
- Bump phonenumbers from 8.13.0 to 8.13.1. ([\#14612](https://github.com/matrix-org/synapse/issues/14612))
- Bump types-setuptools from 65.5.0.3 to 65.6.0.1. ([\#14613](https://github.com/matrix-org/synapse/issues/14613))
- Bump twine from 4.0.1 to 4.0.2. ([\#14614](https://github.com/matrix-org/synapse/issues/14614))
- Bump types-requests from 2.28.11.2 to 2.28.11.5. ([\#14615](https://github.com/matrix-org/synapse/issues/14615))
- Bump cryptography from 38.0.3 to 38.0.4. ([\#14616](https://github.com/matrix-org/synapse/issues/14616))
- Remove useless cargo install with apt from Dockerfile. ([\#14636](https://github.com/matrix-org/synapse/issues/14636))
- Bump certifi from 2021.10.8 to 2022.12.7. ([\#14645](https://github.com/matrix-org/synapse/issues/14645))
- Bump flake8-bugbear from 22.10.27 to 22.12.6. ([\#14656](https://github.com/matrix-org/synapse/issues/14656))
- Bump packaging from 21.3 to 22.0. ([\#14657](https://github.com/matrix-org/synapse/issues/14657))
- Bump types-pillow from 9.3.0.1 to 9.3.0.4. ([\#14658](https://github.com/matrix-org/synapse/issues/14658))
- Bump serde from 1.0.148 to 1.0.150. ([\#14659](https://github.com/matrix-org/synapse/issues/14659))
- Bump phonenumbers from 8.13.1 to 8.13.2. ([\#14660](https://github.com/matrix-org/synapse/issues/14660))
- Bump authlib from 1.1.0 to 1.2.0. ([\#14661](https://github.com/matrix-org/synapse/issues/14661))
- Move `StateFilter` to `synapse.types`. ([\#14668](https://github.com/matrix-org/synapse/issues/14668))
- Improve type hints. ([\#14597](https://github.com/matrix-org/synapse/issues/14597), [\#14646](https://github.com/matrix-org/synapse/issues/14646), [\#14671](https://github.com/matrix-org/synapse/issues/14671))

Synapse 1.73.0 (2022-12-06)
===========================

Please note that legacy Prometheus metric names have been removed in this release; see [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.73/docs/upgrade.md#legacy-prometheus-metric-names-have-now-been-removed) for more details.

No significant changes since 1.73.0rc2.

Synapse 1.73.0rc2 (2022-12-01)
==============================

Bugfixes
--------

- Fix a regression in Synapse 1.73.0rc1 where Synapse's main process would stop responding to HTTP requests when a user with a large number of devices logs in. ([\#14582](https://github.com/matrix-org/synapse/issues/14582))

Synapse 1.73.0rc1 (2022-11-29)
==============================

Features
--------

- Speed-up `/messages` with `filter_events_for_client` optimizations. ([\#14527](https://github.com/matrix-org/synapse/issues/14527))
- Improve DB performance by reducing amount of data that gets read in `device_lists_changes_in_room`. ([\#14534](https://github.com/matrix-org/synapse/issues/14534))
- Adds support for handling avatar in SSO OIDC login. Contributed by @ashfame. ([\#13917](https://github.com/matrix-org/synapse/issues/13917))
- Move MSC3030 `/timestamp_to_event` endpoints to stable `v1` location (`/_matrix/client/v1/rooms/<roomID>/timestamp_to_event?ts=<timestamp>&dir=<direction>`, `/_matrix/federation/v1/timestamp_to_event/<roomID>?ts=<timestamp>&dir=<direction>`). ([\#14471](https://github.com/matrix-org/synapse/issues/14471))
- Reduce database load of [Client-Server endpoints](https://spec.matrix.org/v1.5/client-server-api/#aggregations) which return bundled aggregations. ([\#14491](https://github.com/matrix-org/synapse/issues/14491), [\#14508](https://github.com/matrix-org/synapse/issues/14508), [\#14510](https://github.com/matrix-org/synapse/issues/14510))
- Add unstable support for an Extensible Events room version (`org.matrix.msc1767.10`) via [MSC1767](https://github.com/matrix-org/matrix-spec-proposals/pull/1767), [MSC3931](https://github.com/matrix-org/matrix-spec-proposals/pull/3931), [MSC3932](https://github.com/matrix-org/matrix-spec-proposals/pull/3932), and [MSC3933](https://github.com/matrix-org/matrix-spec-proposals/pull/3933). ([\#14520](https://github.com/matrix-org/synapse/issues/14520), [\#14521](https://github.com/matrix-org/synapse/issues/14521), [\#14524](https://github.com/matrix-org/synapse/issues/14524))
- Prune user's old devices on login if they have too many. ([\#14038](https://github.com/matrix-org/synapse/issues/14038), [\#14580](https://github.com/matrix-org/synapse/issues/14580))

Bugfixes
--------

- Fix a long-standing bug where paginating from the start of a room did not work. Contributed by @gnunicorn. ([\#14149](https://github.com/matrix-org/synapse/issues/14149))
- Fix a bug introduced in Synapse 1.58.0 where a user with presence state `org.matrix.msc3026.busy` would mistakenly be set to `online` when calling `/sync` or `/events` on a worker process. ([\#14393](https://github.com/matrix-org/synapse/issues/14393))
- Fix a bug introduced in Synapse 1.70.0 where a receipt's thread ID was not sent over federation. ([\#14466](https://github.com/matrix-org/synapse/issues/14466))
- Fix a long-standing bug where the [List media admin API](https://matrix-org.github.io/synapse/latest/admin_api/media_admin_api.html#list-all-media-in-a-room) would fail when processing an image with broken thumbnail information. ([\#14537](https://github.com/matrix-org/synapse/issues/14537))
- Fix a bug introduced in Synapse 1.67.0 where two logging context warnings would be logged on startup. ([\#14574](https://github.com/matrix-org/synapse/issues/14574))
- In application service transactions that include the experimental `org.matrix.msc3202.device_one_time_key_counts` key, include a duplicate key of `org.matrix.msc3202.device_one_time_keys_count` to match the name proposed by [MSC3202](https://github.com/matrix-org/matrix-spec-proposals/pull/3202). ([\#14565](https://github.com/matrix-org/synapse/issues/14565))
- Fix a bug introduced in Synapse 0.9 where Synapse would fail to fetch server keys whose IDs contain a forward slash. ([\#14490](https://github.com/matrix-org/synapse/issues/14490))

Improved Documentation
----------------------

- Fixed link to 'Synapse administration endpoints'. ([\#14499](https://github.com/matrix-org/synapse/issues/14499))

Deprecations and Removals
-------------------------

- Remove legacy Prometheus metrics names. They were deprecated in Synapse v1.69.0 and disabled by default in Synapse v1.71.0. ([\#14538](https://github.com/matrix-org/synapse/issues/14538))

Internal Changes
----------------

- Improve type hinting throughout Synapse. ([\#14055](https://github.com/matrix-org/synapse/issues/14055), [\#14412](https://github.com/matrix-org/synapse/issues/14412), [\#14529](https://github.com/matrix-org/synapse/issues/14529), [\#14452](https://github.com/matrix-org/synapse/issues/14452)).
- Remove old stream ID tracking code. Contributed by Nick @Beeper (@fizzadar). ([\#14376](https://github.com/matrix-org/synapse/issues/14376), [\#14468](https://github.com/matrix-org/synapse/issues/14468))
- Remove the `worker_main_http_uri` configuration setting. This is now handled via internal replication. ([\#14400](https://github.com/matrix-org/synapse/issues/14400), [\#14476](https://github.com/matrix-org/synapse/issues/14476))
- Refactor `federation_sender` and `pusher` configuration loading. ([\#14496](https://github.com/matrix-org/synapse/issues/14496))
([\#14509](https://github.com/matrix-org/synapse/issues/14509), [\#14573](https://github.com/matrix-org/synapse/issues/14573))
- Faster joins: do not wait for full state when creating events to send. ([\#14403](https://github.com/matrix-org/synapse/issues/14403))
- Faster joins: filter out non local events when a room doesn't have its full state. ([\#14404](https://github.com/matrix-org/synapse/issues/14404))
- Faster joins: send events to initial list of servers if we don't have the full state yet. ([\#14408](https://github.com/matrix-org/synapse/issues/14408))
- Faster joins: use servers list approximation received during `send_join` (potentially updated with received membership events) in `assert_host_in_room`. ([\#14515](https://github.com/matrix-org/synapse/issues/14515))
- Fix type logic in TCP replication code that prevented correctly ignoring blank commands. ([\#14449](https://github.com/matrix-org/synapse/issues/14449))
- Remove option to skip locking of tables when performing emulated upserts, to avoid a class of bugs in future. ([\#14469](https://github.com/matrix-org/synapse/issues/14469))
- `scripts-dev/federation_client`: Fix routing on servers with `.well-known` files. ([\#14479](https://github.com/matrix-org/synapse/issues/14479))
- Reduce default third party invite rate limit to 216 invites per day. ([\#14487](https://github.com/matrix-org/synapse/issues/14487))
- Refactor conversion of device list changes in room to outbound pokes to track unconverted rows using a `(stream ID, room ID)` position instead of updating the `converted_to_destinations` flag on every row. ([\#14516](https://github.com/matrix-org/synapse/issues/14516))
- Add more prompts to the bug report form. ([\#14522](https://github.com/matrix-org/synapse/issues/14522))
- Extend editorconfig rules on indent and line length to `.pyi` files. ([\#14526](https://github.com/matrix-org/synapse/issues/14526))
- Run Rust CI when `Cargo.lock` changes. This is particularly useful for dependabot updates. ([\#14571](https://github.com/matrix-org/synapse/issues/14571))
- Fix a possible variable shadow in `create_new_client_event`. ([\#14575](https://github.com/matrix-org/synapse/issues/14575))
- Bump various dependencies in the `poetry.lock` file and in CI scripts. ([\#14557](https://github.com/matrix-org/synapse/issues/14557), [\#14559](https://github.com/matrix-org/synapse/issues/14559), [\#14560](https://github.com/matrix-org/synapse/issues/14560), [\#14500](https://github.com/matrix-org/synapse/issues/14500), [\#14501](https://github.com/matrix-org/synapse/issues/14501), [\#14502](https://github.com/matrix-org/synapse/issues/14502), [\#14503](https://github.com/matrix-org/synapse/issues/14503), [\#14504](https://github.com/matrix-org/synapse/issues/14504), [\#14505](https://github.com/matrix-org/synapse/issues/14505)).

Synapse 1.73.0rc2 (2022-12-01)
==============================

Please note that legacy Prometheus metric names have been removed in this release; see [the upgrade notes](https://github.com/matrix-org/synapse/blob/release-v1.73/docs/upgrade.md#legacy-prometheus-metric-names-have-now-been-removed) for more details.

Bugfixes
--------

- Fix a regression in Synapse 1.73.0rc1 where Synapse's main process would stop responding to HTTP requests when a user with a large number of devices logs in. ([\#14582](https://github.com/matrix-org/synapse/issues/14582))