Add changelog

This is useful so that the script can be sourced without exiting the calling subshell.

.ci/before_build_wheel.sh

@@ -7,4 +7,4 @@ if command -v yum &> /dev/null; then
 fi
 
 # Install a Rust toolchain
-curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain stable -y --profile minimal
+curl https://sh.rustup.rs -sSf | sh -s -- --default-toolchain 1.82.0 -y --profile minimal

.ci/scripts/auditwheel_wrapper.py

@@ -0,0 +1,146 @@
+#!/usr/bin/env python
+#
+# This file is licensed under the Affero General Public License (AGPL) version 3.
+#
+# Copyright (C) 2023 New Vector, Ltd
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as
+# published by the Free Software Foundation, either version 3 of the
+# License, or (at your option) any later version.
+#
+# See the GNU Affero General Public License for more details:
+# <https://www.gnu.org/licenses/agpl-3.0.html>.
+#
+# Originally licensed under the Apache License, Version 2.0:
+# <http://www.apache.org/licenses/LICENSE-2.0>.
+#
+# [This file includes modifications made by New Vector Limited]
+#
+#
+
+# Wraps `auditwheel repair` to first check if we're repairing a potentially abi3
+# compatible wheel, if so rename the wheel before repairing it.
+
+import argparse
+import os
+import subprocess
+from zipfile import ZipFile
+
+from packaging.tags import Tag
+from packaging.utils import parse_wheel_filename
+from packaging.version import Version
+
+
+def check_is_abi3_compatible(wheel_file: str) -> None:
+    """Check the contents of the built wheel for any `.so` files that are *not*
+    abi3 compatible.
+    """
+
+    with ZipFile(wheel_file, "r") as wheel:
+        for file in wheel.namelist():
+            if not file.endswith(".so"):
+                continue
+
+            if not file.endswith(".abi3.so"):
+                raise Exception(f"Found non-abi3 lib: {file}")
+
+
+def cpython(wheel_file: str, name: str, version: Version, tag: Tag) -> str:
+    """Replaces the cpython wheel file with a ABI3 compatible wheel"""
+
+    if tag.abi == "abi3":
+        # Nothing to do.
+        return wheel_file
+
+    check_is_abi3_compatible(wheel_file)
+
+    # HACK: it seems that some older versions of pip will consider a wheel marked
+    # as macosx_11_0 as incompatible with Big Sur. I haven't done the full archaeology
+    # here; there are some clues in
+    #     https://github.com/pantsbuild/pants/pull/12857
+    #     https://github.com/pypa/pip/issues/9138
+    #     https://github.com/pypa/packaging/pull/319
+    # Empirically this seems to work, note that macOS 11 and 10.16 are the same,
+    # both versions are valid for backwards compatibility.
+    platform = tag.platform.replace("macosx_11_0", "macosx_10_16")
+    abi3_tag = Tag(tag.interpreter, "abi3", platform)
+
+    dirname = os.path.dirname(wheel_file)
+    new_wheel_file = os.path.join(
+        dirname,
+        f"{name}-{version}-{abi3_tag}.whl",
+    )
+
+    os.rename(wheel_file, new_wheel_file)
+
+    print("Renamed wheel to", new_wheel_file)
+
+    return new_wheel_file
+
+
+def main(wheel_file: str, dest_dir: str, archs: str | None) -> None:
+    """Entry point"""
+
+    # Parse the wheel file name into its parts. Note that `parse_wheel_filename`
+    # normalizes the package name (i.e. it converts matrix_synapse ->
+    # matrix-synapse), which is not what we want.
+    _, version, build, tags = parse_wheel_filename(os.path.basename(wheel_file))
+    name = os.path.basename(wheel_file).split("-")[0]
+
+    if len(tags) != 1:
+        # We expect only a wheel file with only a single tag
+        raise Exception(f"Unexpectedly found multiple tags: {tags}")
+
+    tag = next(iter(tags))
+
+    if build:
+        # We don't use build tags in Synapse
+        raise Exception(f"Unexpected build tag: {build}")
+
+    # If the wheel is for cpython then convert it into an abi3 wheel.
+    if tag.interpreter.startswith("cp"):
+        wheel_file = cpython(wheel_file, name, version, tag)
+
+    # Finally, repair the wheel.
+    if archs is not None:
+        # If we are given archs then we are on macos and need to use
+        # `delocate-listdeps`.
+        subprocess.run(["delocate-listdeps", wheel_file], check=True)
+        subprocess.run(
+            ["delocate-wheel", "--require-archs", archs, "-w", dest_dir, wheel_file],
+            check=True,
+        )
+    else:
+        subprocess.run(["auditwheel", "repair", "-w", dest_dir, wheel_file], check=True)
+
+
+if __name__ == "__main__":
+    parser = argparse.ArgumentParser(description="Tag wheel as abi3 and repair it.")
+
+    parser.add_argument(
+        "--wheel-dir",
+        "-w",
+        metavar="WHEEL_DIR",
+        help="Directory to store delocated wheels",
+        required=True,
+    )
+
+    parser.add_argument(
+        "--require-archs",
+        metavar="archs",
+        default=None,
+    )
+
+    parser.add_argument(
+        "wheel_file",
+        metavar="WHEEL_FILE",
+    )
+
+    args = parser.parse_args()
+
+    wheel_file = args.wheel_file
+    wheel_dir = args.wheel_dir
+    archs = args.require_archs
+
+    main(wheel_file, wheel_dir, archs)

.ci/scripts/prepare_old_deps.sh

@@ -0,0 +1,39 @@
+#!/usr/bin/env bash
+# this script is run by GitHub Actions in a plain `jammy` container; it
+# - installs the minimal system requirements, and poetry;
+# - patches the project definition file to refer to old versions only;
+# - creates a venv with these old versions using poetry; and finally
+# - invokes `trial` to run the tests with old deps.
+
+set -ex
+
+# Prevent virtualenv from auto-updating pip to an incompatible version
+export VIRTUALENV_NO_DOWNLOAD=1
+
+# TODO: in the future, we could use an implementation of
+#   https://github.com/python-poetry/poetry/issues/3527
+#   https://github.com/pypa/pip/issues/8085
+# to select the lowest possible versions, rather than resorting to this sed script.
+
+# Patch the project definitions in-place:
+# - `-E` use extended regex syntax.
+# - Don't modify the line that defines required Python versions.
+# - Replace all lower and tilde bounds with exact bounds.
+# - Replace all caret bounds with exact bounds.
+# - Delete all lines referring to psycopg2 - so no testing of postgres support.
+# - Use pyopenssl 17.0, which is the oldest version that works with
+#   a `cryptography` compiled against OpenSSL 1.1.
+# - Omit systemd: we're not logging to journal here.
+
+sed -i -E '
+  /^\s*requires-python\s*=/b
+  s/[~>]=/==/g
+  s/\^/==/g
+  /psycopg2/d
+  s/pyOpenSSL\s*==\s*16\.0\.0"/pyOpenSSL==17.0.0"/
+  /systemd/d
+' pyproject.toml
+
+echo "::group::Patched pyproject.toml"
+cat pyproject.toml
+echo "::endgroup::"

.github/dependabot.yml

@@ -1,92 +1,23 @@
 version: 2
-# As dependabot is currently only run on a weekly basis, we raise the
-# open-pull-requests-limit to 10 (from the default of 5) to better ensure we
-# don't continuously grow a backlog of updates.
 updates:
   - # "pip" is the correct setting for poetry, per https://docs.github.com/en/code-security/dependabot/dependabot-version-updates/configuration-options-for-the-dependabot.yml-file#package-ecosystem
     package-ecosystem: "pip"
     directory: "/"
-    open-pull-requests-limit: 10
     schedule:
       interval: "weekly"
-    # Group patch updates to packages together into a single PR, as they rarely
-    # if ever contain breaking changes that need to be reviewed separately.
-    # 
-    # Less PRs means a streamlined review process.
-    #
-    # Python packages follow semantic versioning, and tend to only introduce
-    # breaking changes in major version bumps. Thus, we'll group minor and patch
-    # versions together.
-    groups:
-      minor-and-patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "minor"
-          - "patch"
-    # Prevent pulling packages that were recently updated to help mitigate
-    # supply chain attacks. 14 days was taken from the recommendation at
-    # https://blog.yossarian.net/2025/11/21/We-should-all-be-using-dependency-cooldowns
-    # where the author noted that 9/10 attacks would have been mitigated by a
-    # two week cooldown.
-    #
-    # The cooldown only applies to general updates; security updates will still
-    # be pulled in as soon as possible.
-    cooldown:
-      default-days: 14
 
   - package-ecosystem: "docker"
     directory: "/docker"
-    open-pull-requests-limit: 10
     schedule:
       interval: "weekly"
-    # For container versions, breaking changes are also typically only introduced in major
-    # package bumps.
-    groups:
-      minor-and-patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "minor"
-          - "patch"
-    cooldown:
-      default-days: 14
 
   - package-ecosystem: "github-actions"
     directory: "/"
-    open-pull-requests-limit: 10
     schedule:
       interval: "weekly"
-    # Similarly for GitHub Actions, breaking changes are typically only introduced in major
-    # package bumps.
-    groups:
-      minor-and-patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "minor"
-          - "patch"
-    cooldown:
-      default-days: 14
 
   - package-ecosystem: "cargo"
     directory: "/"
-    open-pull-requests-limit: 10
     versioning-strategy: "lockfile-only"
     schedule:
       interval: "weekly"
-    # The Rust ecosystem is special in that breaking changes are often introduced
-    # in minor version bumps, as packages typically stay pre-1.0 for a long time.
-    # Thus we specifically keep minor version bumps separate in their own PRs.
-    groups:
-      patches:
-        applies-to: version-updates
-        patterns:
-          - "*"
-        update-types:
-          - "patch"
-    cooldown:
-      default-days: 14

.github/workflows/docker.yml

@@ -31,7 +31,7 @@ jobs:
         uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
 
       - name: Checkout repository
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Extract version from pyproject.toml
         # Note: explicitly requesting bash will mean bash is invoked with `-eo pipefail`, see
@@ -123,7 +123,7 @@ jobs:
         uses: sigstore/cosign-installer@faadad0cce49287aee09b3a48701e75088a2c6ad # v4.0.0
 
       - name: Calculate docker image tag
-        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+        uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893 # v5.9.0
         with:
           images: ${{ matrix.repository }}
           flavor: |

.github/workflows/docs-pr-netlify.yaml

@@ -0,0 +1,34 @@
+name: Deploy documentation PR preview
+
+on:
+  workflow_run:
+    workflows: [ "Prepare documentation PR preview" ]
+    types:
+      - completed
+
+jobs:
+  netlify:
+    if: github.event.workflow_run.conclusion == 'success' && github.event.workflow_run.event == 'pull_request'
+    runs-on: ubuntu-latest
+    steps:
+      # There's a 'download artifact' action, but it hasn't been updated for the workflow_run action
+      # (https://github.com/actions/download-artifact/issues/60) so instead we get this mess:
+      - name: 📥 Download artifact
+        uses: dawidd6/action-download-artifact@ac66b43f0e6a346234dd65d4d0c8fbb31cb316e5 # v11
+        with:
+          workflow: docs-pr.yaml
+          run_id: ${{ github.event.workflow_run.id }}
+          name: book
+          path: book
+
+      - name: 📤 Deploy to Netlify
+        uses: matrix-org/netlify-pr-preview@9805cd123fc9a7e421e35340a05e1ebc5dee46b5 # v3
+        with:
+          path: book
+          owner: ${{ github.event.workflow_run.head_repository.owner.login }}
+          branch: ${{ github.event.workflow_run.head_branch }}
+          revision: ${{ github.event.workflow_run.head_sha }}
+          token: ${{ secrets.NETLIFY_AUTH_TOKEN }}
+          site_id: ${{ secrets.NETLIFY_SITE_ID }}
+          desc: Documentation preview
+          deployment_env: PR Documentation Preview

.github/workflows/docs-pr.yaml

@@ -13,7 +13,7 @@ jobs:
     name: GitHub Pages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           # Fetch all history so that the schema_versions script works.
           fetch-depth: 0
@@ -24,7 +24,7 @@ jobs:
           mdbook-version: '0.4.17'
 
       - name: Setup python
-        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
 
@@ -50,7 +50,7 @@ jobs:
     name: Check links in documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Setup mdbook
         uses: peaceiris/actions-mdbook@ee69d230fe19748b7abf22df32acaa93833fad08 # v2.0.0

.github/workflows/docs.yaml

@@ -50,7 +50,7 @@ jobs:
     needs:
       - pre
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           # Fetch all history so that the schema_versions script works.
           fetch-depth: 0
@@ -64,7 +64,7 @@ jobs:
         run: echo 'window.SYNAPSE_VERSION = "${{ needs.pre.outputs.branch-version }}";' > ./docs/website_files/version.js
 
       - name: Setup python
-        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
 

.github/workflows/fix_lint.yaml

@@ -18,14 +18,14 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
           components: clippy, rustfmt
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - name: Setup Poetry
         uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0

.github/workflows/latest_deps.yml

@@ -42,12 +42,12 @@ jobs:
     if: needs.check_repo.outputs.should_run_workflow == 'true'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       # The dev dependencies aren't exposed in the wheel metadata (at least with current
       # poetry-core versions), so we install with poetry.
@@ -77,13 +77,13 @@ jobs:
             postgres-version: "14"
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - run: sudo apt-get -qq install xmlsec1
       - name: Set up PostgreSQL ${{ matrix.postgres-version }}
@@ -93,7 +93,7 @@ jobs:
             -e POSTGRES_PASSWORD=postgres \
             -e POSTGRES_INITDB_ARGS="--lc-collate C --lc-ctype C --encoding UTF8" \
             postgres:${{ matrix.postgres-version }}
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - run: pip install .[all,test]
@@ -152,13 +152,13 @@ jobs:
       BLACKLIST: ${{ matrix.workers && 'synapse-blacklist-with-workers' }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - name: Ensure sytest runs `pip install`
         # Delete the lockfile so sytest will `pip install` rather than `poetry install`
@@ -202,14 +202,14 @@ jobs:
 
     steps:
       - name: Check out synapse codebase
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: synapse
 
       - name: Prepare Complement's Prerequisites
         run: synapse/.ci/scripts/setup_complement_prerequisites.sh
 
-      - uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
+      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           cache-dependency-path: complement/go.sum
           go-version-file: complement/go.mod
@@ -234,7 +234,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

.github/workflows/poetry_lockfile.yaml

@@ -16,8 +16,8 @@ jobs:
     name: "Check locked dependencies have sdists"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: '3.x'
       - run: pip install tomli

.github/workflows/push_complement_image.yml

@@ -33,17 +33,17 @@ jobs:
       packages: write
     steps:
       - name: Checkout specific branch (debug build)
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         if: github.event_name == 'workflow_dispatch'
         with:
           ref: ${{ inputs.branch }}
       - name: Checkout clean copy of develop (scheduled build)
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         if: github.event_name == 'schedule'
         with:
           ref: develop
       - name: Checkout clean copy of master (on-push)
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         if: github.event_name == 'push'
         with:
           ref: master
@@ -55,7 +55,7 @@ jobs:
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Work out labels for complement image
         id: meta
-        uses: docker/metadata-action@c299e40c65443455700f0fdfc63efafe5b349051 # v5.10.0
+        uses: docker/metadata-action@318604b99e75e41977312d83839a89be02ca4893 # v5.9.0
         with:
           images: ghcr.io/${{ github.repository }}/complement-synapse
           tags: |

.github/workflows/release-artifacts.yml

@@ -5,7 +5,7 @@ name: Build release artifacts
 on:
   # we build on PRs and develop to (hopefully) get early warning
   # of things breaking (but only build one set of debs). PRs skip
-  # building wheels on ARM.
+  # building wheels on macOS & ARM.
   pull_request:
   push:
     branches: ["develop", "release-*"]
@@ -27,8 +27,8 @@ jobs:
     name: "Calculate list of debian distros"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - id: set-distros
@@ -55,7 +55,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: src
 
@@ -74,7 +74,7 @@ jobs:
             ${{ runner.os }}-buildx-
 
       - name: Set up python
-        uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+        uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
 
@@ -114,20 +114,27 @@ jobs:
         os:
           - ubuntu-24.04
           - ubuntu-24.04-arm
+          - macos-14 # This uses arm64
+          - macos-15-intel # This uses x86-64
         # is_pr is a flag used to exclude certain jobs from the matrix on PRs.
         # It is not read by the rest of the workflow.
         is_pr:
           - ${{ startsWith(github.ref, 'refs/pull/') }}
 
         exclude:
+          # Don't build macos wheels on PR CI.
+          - is_pr: true
+            os: "macos-15-intel"
+          - is_pr: true
+            os: "macos-14"
           # Don't build aarch64 wheels on PR CI.
           - is_pr: true
             os: "ubuntu-24.04-arm"
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           # setup-python@v4 doesn't impose a default python version. Need to use 3.x
           # here, because `python` on osx points to Python 2.7.
@@ -163,8 +170,8 @@ jobs:
     if: ${{ !startsWith(github.ref, 'refs/pull/') }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.10"
 

.github/workflows/schema.yaml

@@ -14,8 +14,8 @@ jobs:
     name: Ensure Synapse config schema is valid
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - name: Install check-jsonschema
@@ -40,8 +40,8 @@ jobs:
     name: Ensure generated documentation is up-to-date
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - name: Install PyYAML

.github/workflows/tests.yml

@@ -86,12 +86,12 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
       - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
           python-version: "3.x"
@@ -106,18 +106,18 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
-      - run: "pip install 'click==8.1.1' 'GitPython>=3.1.20' 'sqlglot>=28.0.0'"
+      - run: "pip install 'click==8.1.1' 'GitPython>=3.1.20'"
       - run: scripts-dev/check_schema_delta.py --force-colors
 
   check-lockfile:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - run: .ci/scripts/check_lockfile.py
@@ -129,7 +129,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Setup Poetry
         uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
@@ -151,13 +151,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - name: Setup Poetry
         uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
@@ -187,20 +187,19 @@ jobs:
   lint-crlf:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Check line endings
         run: scripts-dev/check_line_terminators.sh
 
   lint-newsfile:
-    # Only run on pull_request events, targeting develop/release branches, and skip when the PR author is dependabot[bot].
+    if: ${{ (github.base_ref == 'develop'  || contains(github.base_ref, 'release-')) && github.actor != 'dependabot[bot]' }}
-    if: ${{ github.event_name == 'pull_request' && (github.base_ref == 'develop' || contains(github.base_ref, 'release-')) && github.event.pull_request.user.login != 'dependabot[bot]' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - run: "pip install 'towncrier>=18.6.0rc1'"
@@ -214,14 +213,14 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
             components: clippy
             toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - run: cargo clippy -- -D warnings
 
@@ -233,14 +232,14 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
             toolchain: nightly-2025-04-23
             components: clippy
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - run: cargo clippy --all-features -- -D warnings
 
@@ -251,13 +250,13 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - name: Setup Poetry
         uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
@@ -287,7 +286,7 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
@@ -296,7 +295,7 @@ jobs:
           # `.rustfmt.toml`.
           toolchain: nightly-2025-04-23
           components: rustfmt
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - run: cargo fmt --check
 
@@ -307,8 +306,8 @@ jobs:
     needs: changes
     if: ${{ needs.changes.outputs.linting_readme == 'true' }}
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - run: "pip install rstcheck"
@@ -355,8 +354,8 @@ jobs:
     needs: linting-done
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: "3.x"
       - id: get-matrix
@@ -376,7 +375,7 @@ jobs:
         job:  ${{ fromJson(needs.calculate-test-jobs.outputs.trial_test_matrix) }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - run: sudo apt-get -qq install xmlsec1
       - name: Set up PostgreSQL ${{ matrix.job.postgres-version }}
         if: ${{ matrix.job.postgres-version }}
@@ -394,7 +393,7 @@ jobs:
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
@@ -432,13 +431,13 @@ jobs:
       - changes
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       # There aren't wheels for some of the older deps, so we need to install
       # their build dependencies
@@ -447,17 +446,19 @@ jobs:
           sudo apt-get -qq install build-essential libffi-dev python3-dev \
             libxml2-dev libxslt-dev xmlsec1 zlib1g-dev libjpeg-dev libwebp-dev
 
-      - uses: actions/setup-python@83679a892e2d95755f2dac6acb0bfd1e9ac5d548 # v6.1.0
+      - uses: actions/setup-python@e797f83bcb11b83ae66e0230d6156d7c80228e7c # v6.0.0
         with:
           python-version: '3.10'
 
       - name: Prepare old deps
-        # Note: we install using `uv` here, not poetry or pip to allow us to test with the
+        if: steps.cache-poetry-old-deps.outputs.cache-hit != 'true'
-        # minimum version of all dependencies, both those explicitly specified and those
+        run: .ci/scripts/prepare_old_deps.sh
-        # implicitly brought in by the explicit dependencies. 
+
-        run: |
+      # Note: we install using `pip` here, not poetry. `poetry install` ignores the
-          pip install uv
+      # build-system section (https://github.com/python-poetry/poetry/issues/6154), but
-          uv pip install --system --resolution=lowest .[all,test]
+      # we explicitly want to test that you can `pip install` using the oldest version
+      # of poetry-core and setuptools-rust.
+      - run: pip install .[all,test]
 
       # We nuke the local copy, as we've installed synapse into the virtualenv
       # (rather than use an editable install, which we no longer support). If we
@@ -495,7 +496,7 @@ jobs:
         extras: ["all"]
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       # Install libs necessary for PyPy to build binary wheels for dependencies
       - run: sudo apt-get -qq install xmlsec1 libxml2-dev libxslt-dev
       - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
@@ -545,7 +546,7 @@ jobs:
         job: ${{ fromJson(needs.calculate-test-jobs.outputs.sytest_test_matrix) }}
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Prepare test blacklist
         run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
 
@@ -553,7 +554,7 @@ jobs:
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - name: Run SyTest
         run: /bootstrap.sh synapse
@@ -592,7 +593,7 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - run: sudo apt-get -qq install xmlsec1 postgresql-client
       - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
@@ -636,7 +637,7 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Add PostgreSQL apt repository
         # We need a version of pg_dump that can handle the version of
         # PostgreSQL being tested against. The Ubuntu package repository lags
@@ -691,7 +692,7 @@ jobs:
 
     steps:
       - name: Checkout synapse codebase
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: synapse
 
@@ -699,12 +700,12 @@ jobs:
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - name: Prepare Complement's Prerequisites
         run: synapse/.ci/scripts/setup_complement_prerequisites.sh
 
-      - uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
+      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           cache-dependency-path: complement/go.sum
           go-version-file: complement/go.mod
@@ -727,13 +728,13 @@ jobs:
       - changes
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - run: cargo test
 
@@ -747,13 +748,13 @@ jobs:
       - changes
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
             toolchain: nightly-2022-12-01
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - run: cargo bench --no-run
 

.github/workflows/triage_labelled.yml

@@ -22,7 +22,7 @@ jobs:
       # This field is case-sensitive.
       TARGET_STATUS: Needs info
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           # Only clone the script file we care about, instead of the whole repo.
           sparse-checkout: .ci/scripts/triage_labelled_issue.sh

.github/workflows/twisted_trunk.yml

@@ -43,13 +43,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
@@ -70,14 +70,14 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - run: sudo apt-get -qq install xmlsec1
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
         with:
@@ -117,13 +117,13 @@ jobs:
         - ${{ github.workspace }}:/src
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
         uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
-      - uses: Swatinem/rust-cache@779680da715d629ac1d338a641029a2f4372abb5 # v2.8.2
+      - uses: Swatinem/rust-cache@f13886b937689c021905a6b90929199931d60db1 # v2.8.1
 
       - name: Patch dependencies
         # Note: The poetry commands want to create a virtualenv in /src/.venv/,
@@ -175,14 +175,14 @@ jobs:
 
     steps:
       - name: Run actions/checkout@v4 for synapse
-        uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: synapse
 
       - name: Prepare Complement's Prerequisites
         run: synapse/.ci/scripts/setup_complement_prerequisites.sh
 
-      - uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
+      - uses: actions/setup-go@44694675825211faa026b3c33043df3e48a5fa00 # v6.0.0
         with:
           cache-dependency-path: complement/go.sum
           go-version-file: complement/go.mod
@@ -217,7 +217,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@1af3b93b6815bc44a9784bd300feb67ff0d1eeb3 # v6.0.0
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

CHANGES.md

@@ -1,107 +1,5 @@
-# Synapse 1.144.0 (2025-12-09)
-
-## Deprecation of MacOS Python wheels
-
-The team has decided to deprecate and stop publishing python wheels for MacOS.
-Synapse docker images will continue to work on MacOS, as will building Synapse
-from source (though note this requires a Rust compiler).
-
-## Unstable mutual rooms endpoint is now behind an experimental feature flag
-
-Admins using the unstable [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) endpoint (`/_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`),
-please check [the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/develop/docs/upgrade.md#upgrading-to-v11440) as this release contains changes
-that disable that endpoint by default.
-
-
-
-No significant changes since 1.144.0rc1.
-
-
-
-
-# Synapse 1.144.0rc1 (2025-12-02)
-
-Admins using the unstable [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) endpoint (`/_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`), please check [the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/develop/docs/upgrade.md#upgrading-to-v11440) as this release contains changes that disable that endpoint by default.
-
-## Features
-
-- Add experimentatal implememntation of [MSC4380](https://github.com/matrix-org/matrix-spec-proposals/pull/4380) (invite blocking). ([\#19203](https://github.com/element-hq/synapse/issues/19203))
-- Allow restarting delayed event timeouts on workers. ([\#19207](https://github.com/element-hq/synapse/issues/19207))
-
-## Bugfixes
-
-- Fix a bug in the database function for fetching state deltas that could result in unnecessarily long query times. ([\#18960](https://github.com/element-hq/synapse/issues/18960))
-- Fix v12 rooms when running with `use_frozen_dicts: True`. ([\#19235](https://github.com/element-hq/synapse/issues/19235))
-- Fix bug where invalid `canonical_alias` content would return 500 instead of 400. ([\#19240](https://github.com/element-hq/synapse/issues/19240))
-- Fix bug where `Duration` was logged incorrectly. ([\#19267](https://github.com/element-hq/synapse/issues/19267))
-
-## Improved Documentation
-
-- Document in the `--config-path` help how multiple files are merged - by merging them shallowly. ([\#19243](https://github.com/element-hq/synapse/issues/19243))
-
-## Deprecations and Removals
-
-- Stop building release wheels for MacOS. ([\#19225](https://github.com/element-hq/synapse/issues/19225))
-
-## Internal Changes
-
-- Improve event filtering for Simplified Sliding Sync. ([\#17782](https://github.com/element-hq/synapse/issues/17782))
-- Export `SYNAPSE_SUPPORTED_COMPLEMENT_TEST_PACKAGES` environment variable from `scripts-dev/complement.sh`. ([\#19208](https://github.com/element-hq/synapse/issues/19208))
-- Refactor `scripts-dev/complement.sh` logic to avoid `exit` to facilitate being able to source it from other scripts (composable). ([\#19209](https://github.com/element-hq/synapse/issues/19209))
-- Expire sliding sync connections that are too old or have too much pending data. ([\#19211](https://github.com/element-hq/synapse/issues/19211))
-- Require an experimental feature flag to be enabled in order for the unstable [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) endpoint (`/_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`) to be available. ([\#19219](https://github.com/element-hq/synapse/issues/19219))
-- Prevent changelog check CI running on @dependabot's PRs even when a human has modified the branch. ([\#19220](https://github.com/element-hq/synapse/issues/19220))
-- Auto-fix trailing spaces in multi-line strings and comments when running the lint script. ([\#19221](https://github.com/element-hq/synapse/issues/19221))
-- Move towards using a dedicated `Duration` type. ([\#19223](https://github.com/element-hq/synapse/issues/19223), [\#19229](https://github.com/element-hq/synapse/issues/19229))
-- Improve robustness of the SQL schema linting in CI. ([\#19224](https://github.com/element-hq/synapse/issues/19224))
-- Add log to determine whether clients are using `/messages` as expected. ([\#19226](https://github.com/element-hq/synapse/issues/19226))
-- Simplify README and add ESS Getting started section. ([\#19228](https://github.com/element-hq/synapse/issues/19228), [\#19259](https://github.com/element-hq/synapse/issues/19259))
-- Add a unit test for ensuring associated refresh tokens are erased when a device is deleted. ([\#19230](https://github.com/element-hq/synapse/issues/19230))
-- Prompt user to consider adding future deprecations to the changelog in release script. ([\#19239](https://github.com/element-hq/synapse/issues/19239))
-- Fix check of the Rust compiled code being outdated when using source checkout and `.egg-info`. ([\#19251](https://github.com/element-hq/synapse/issues/19251))
-- Stop building macos wheels in CI pipeline. ([\#19263](https://github.com/element-hq/synapse/issues/19263))
-
-
-
-### Updates to locked dependencies
-
-* Bump Swatinem/rust-cache from 2.8.1 to 2.8.2. ([\#19244](https://github.com/element-hq/synapse/issues/19244))
-* Bump actions/checkout from 5.0.0 to 6.0.0. ([\#19213](https://github.com/element-hq/synapse/issues/19213))
-* Bump actions/setup-go from 6.0.0 to 6.1.0. ([\#19214](https://github.com/element-hq/synapse/issues/19214))
-* Bump actions/setup-python from 6.0.0 to 6.1.0. ([\#19245](https://github.com/element-hq/synapse/issues/19245))
-* Bump attrs from 25.3.0 to 25.4.0. ([\#19215](https://github.com/element-hq/synapse/issues/19215))
-* Bump docker/metadata-action from 5.9.0 to 5.10.0. ([\#19246](https://github.com/element-hq/synapse/issues/19246))
-* Bump http from 1.3.1 to 1.4.0. ([\#19249](https://github.com/element-hq/synapse/issues/19249))
-* Bump pydantic from 2.12.4 to 2.12.5. ([\#19250](https://github.com/element-hq/synapse/issues/19250))
-* Bump pyopenssl from 25.1.0 to 25.3.0. ([\#19248](https://github.com/element-hq/synapse/issues/19248))
-* Bump rpds-py from 0.28.0 to 0.29.0. ([\#19216](https://github.com/element-hq/synapse/issues/19216))
-* Bump rpds-py from 0.29.0 to 0.30.0. ([\#19247](https://github.com/element-hq/synapse/issues/19247))
-* Bump sentry-sdk from 2.44.0 to 2.46.0. ([\#19218](https://github.com/element-hq/synapse/issues/19218))
-* Bump types-bleach from 6.2.0.20250809 to 6.3.0.20251115. ([\#19217](https://github.com/element-hq/synapse/issues/19217))
-* Bump types-jsonschema from 4.25.1.20250822 to 4.25.1.20251009. ([\#19252](https://github.com/element-hq/synapse/issues/19252))
-
-# Synapse 1.143.0 (2025-11-25)
-
-## Dropping support for PostgreSQL 13
-
-In line with our [deprecation policy](https://github.com/element-hq/synapse/blob/develop/docs/deprecation_policy.md), we've dropped
-support for PostgreSQL 13, as it is no longer supported upstream.
-This release of Synapse requires PostgreSQL 14+.
-
-No significant changes since 1.143.0rc2.
-
-
-
-
 # Synapse 1.143.0rc2 (2025-11-18)
 
-## Dropping support for PostgreSQL 13
-
-In line with our [deprecation policy](https://github.com/element-hq/synapse/blob/develop/docs/deprecation_policy.md), we've dropped
-support for PostgreSQL 13, as it is no longer supported upstream.
-This release of Synapse requires PostgreSQL 14+.
-
-
 ## Internal Changes
 
 - Fixes docker image creation in the release workflow.
@@ -110,6 +8,12 @@ This release of Synapse requires PostgreSQL 14+.
 
 # Synapse 1.143.0rc1 (2025-11-18)
 
+## Dropping support for PostgreSQL 13
+
+In line with our [deprecation policy](https://github.com/element-hq/synapse/blob/develop/docs/deprecation_policy.md), we've dropped
+support for PostgreSQL 13, as it is no longer supported upstream.
+This release of Synapse requires PostgreSQL 14+.
+
 ## Features
 
 - Support multiple config files in `register_new_matrix_user`. ([\#18784](https://github.com/element-hq/synapse/issues/18784))

Cargo.lock

@@ -374,11 +374,12 @@ checksum = "7f24254aa9a54b5c858eaee2f5bccdb46aaf0e486a595ed5fd8f86ba55232a70"
 
 [[package]]
 name = "http"
-version = "1.4.0"
+version = "1.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e3ba2a386d7f85a81f119ad7498ebe444d2e22c2af0b86b069416ace48b3311a"
+checksum = "f4a85d31aea989eead29a3aaf9e1115a180df8282431156e533de47660892565"
 dependencies = [
  "bytes",
+ "fnv",
  "itoa",
 ]
 

README.rst

@@ -7,48 +7,170 @@
 
 Synapse is an open source `Matrix <https://matrix.org>`__ homeserver
 implementation, written and maintained by `Element <https://element.io>`_.
-`Matrix <https://github.com/matrix-org>`__ is the open standard for secure and
+`Matrix <https://github.com/matrix-org>`__ is the open standard for
-interoperable real-time communications. You can directly run and manage the
+secure and interoperable real-time communications. You can directly run
-source code in this repository, available under an AGPL license (or
+and manage the source code in this repository, available under an AGPL
-alternatively under a commercial license from Element).
+license (or alternatively under a commercial license from Element).
+There is no support provided by Element unless you have a
+subscription from Element.
 
-There is no support provided by Element unless you have a subscription from
+Subscription
-Element.
+============
 
-🚀 Getting started
+For those that need an enterprise-ready solution, Element
-==================
+Server Suite (ESS) is `available via subscription <https://element.io/pricing>`_.
+ESS builds on Synapse to offer a complete Matrix-based backend including the full
+`Admin Console product <https://element.io/enterprise-functionality/admin-console>`_,
+giving admins the power to easily manage an organization-wide
+deployment. It includes advanced identity management, auditing,
+moderation and data retention options as well as Long-Term Support and
+SLAs. ESS supports any Matrix-compatible client.
 
-This component is developed and maintained by `Element <https://element.io>`_.
+.. contents::
-It gets shipped as part of the **Element Server Suite (ESS)** which provides the
-official means of deployment.
 
-ESS is a Matrix distribution from Element with focus on quality and ease of use.
+🛠️ Installation and configuration
-It ships a full Matrix stack tailored to the respective use case.
+==================================
 
-There are three editions of ESS:
+The Synapse documentation describes `how to install Synapse <https://element-hq.github.io/synapse/latest/setup/installation.html>`_. We recommend using
+`Docker images <https://element-hq.github.io/synapse/latest/setup/installation.html#docker-images-and-ansible-playbooks>`_ or `Debian packages from Matrix.org
+<https://element-hq.github.io/synapse/latest/setup/installation.html#matrixorg-packages>`_.
 
-- `ESS Community <https://github.com/element-hq/ess-helm>`_ - the free Matrix
+.. _federation:
-  distribution from Element tailored to small-/mid-scale, non-commercial
+
-  community use cases
+Synapse has a variety of `config options
-- `ESS Pro <https://element.io/server-suite>`_ - the commercial Matrix
+<https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html>`_
-  distribution from Element for professional use
+which can be used to customise its behaviour after installation.
-- `ESS TI-M <https://element.io/server-suite/ti-messenger>`_ - a special version
+There are additional details on how to `configure Synapse for federation here
-  of ESS Pro focused on the requirements of TI-Messenger Pro and ePA as
+<https://element-hq.github.io/synapse/latest/federate.html>`_.
-  specified by the German National Digital Health Agency Gematik
+
+.. _reverse-proxy:
+
+Using a reverse proxy with Synapse
+----------------------------------
+
+It is recommended to put a reverse proxy such as
+`nginx <https://nginx.org/en/docs/http/ngx_http_proxy_module.html>`_,
+`Apache <https://httpd.apache.org/docs/current/mod/mod_proxy_http.html>`_,
+`Caddy <https://caddyserver.com/docs/quick-starts/reverse-proxy>`_,
+`HAProxy <https://www.haproxy.org/>`_ or
+`relayd <https://man.openbsd.org/relayd.8>`_ in front of Synapse. One advantage of
+doing so is that it means that you can expose the default https port (443) to
+Matrix clients without needing to run Synapse with root privileges.
+For information on configuring one, see `the reverse proxy docs
+<https://element-hq.github.io/synapse/latest/reverse_proxy.html>`_.
+
+Upgrading an existing Synapse
+-----------------------------
+
+The instructions for upgrading Synapse are in `the upgrade notes`_.
+Please check these instructions as upgrading may require extra steps for some
+versions of Synapse.
+
+.. _the upgrade notes: https://element-hq.github.io/synapse/develop/upgrade.html
 
 
-🛠️ Standalone installation and configuration
+Platform dependencies
-============================================
+---------------------
 
-The Synapse documentation describes `options for installing Synapse standalone
+Synapse uses a number of platform dependencies such as Python and PostgreSQL,
-<https://element-hq.github.io/synapse/latest/setup/installation.html>`_. See
+and aims to follow supported upstream versions. See the
-below for more useful documentation links.
+`deprecation policy <https://element-hq.github.io/synapse/latest/deprecation_policy.html>`_
+for more details.
 
-- `Synapse configuration options <https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html>`_
-- `Synapse configuration for federation <https://element-hq.github.io/synapse/latest/federate.html>`_
-- `Using a reverse proxy with Synapse <https://element-hq.github.io/synapse/latest/reverse_proxy.html>`_
-- `Upgrading Synapse <https://element-hq.github.io/synapse/develop/upgrade.html>`_
 
+Security note
+-------------
+
+Matrix serves raw, user-supplied data in some APIs -- specifically the `content
+repository endpoints`_.
+
+.. _content repository endpoints: https://matrix.org/docs/spec/client_server/latest.html#get-matrix-media-r0-download-servername-mediaid
+
+Whilst we make a reasonable effort to mitigate against XSS attacks (for
+instance, by using `CSP`_), a Matrix homeserver should not be hosted on a
+domain hosting other web applications. This especially applies to sharing
+the domain with Matrix web clients and other sensitive applications like
+webmail. See
+https://developer.github.com/changes/2014-04-25-user-content-security for more
+information.
+
+.. _CSP: https://github.com/matrix-org/synapse/pull/1021
+
+Ideally, the homeserver should not simply be on a different subdomain, but on
+a completely different `registered domain`_ (also known as top-level site or
+eTLD+1). This is because `some attacks`_ are still possible as long as the two
+applications share the same registered domain.
+
+.. _registered domain: https://tools.ietf.org/html/draft-ietf-httpbis-rfc6265bis-03#section-2.3
+
+.. _some attacks: https://en.wikipedia.org/wiki/Session_fixation#Attacks_using_cross-subdomain_cookie
+
+To illustrate this with an example, if your Element Web or other sensitive web
+application is hosted on ``A.example1.com``, you should ideally host Synapse on
+``example2.com``. Some amount of protection is offered by hosting on
+``B.example1.com`` instead, so this is also acceptable in some scenarios.
+However, you should *not* host your Synapse on ``A.example1.com``.
+
+Note that all of the above refers exclusively to the domain used in Synapse's
+``public_baseurl`` setting. In particular, it has no bearing on the domain
+mentioned in MXIDs hosted on that server.
+
+Following this advice ensures that even if an XSS is found in Synapse, the
+impact to other applications will be minimal.
+
+
+🧪 Testing a new installation
+=============================
+
+The easiest way to try out your new Synapse installation is by connecting to it
+from a web client.
+
+Unless you are running a test instance of Synapse on your local machine, in
+general, you will need to enable TLS support before you can successfully
+connect from a client: see
+`TLS certificates <https://element-hq.github.io/synapse/latest/setup/installation.html#tls-certificates>`_.
+
+An easy way to get started is to login or register via Element at
+https://app.element.io/#/login or https://app.element.io/#/register respectively.
+You will need to change the server you are logging into from ``matrix.org``
+and instead specify a homeserver URL of ``https://<server_name>:8448``
+(or just ``https://<server_name>`` if you are using a reverse proxy).
+If you prefer to use another client, refer to our
+`client breakdown <https://matrix.org/ecosystem/clients/>`_.
+
+If all goes well you should at least be able to log in, create a room, and
+start sending messages.
+
+.. _`client-user-reg`:
+
+Registering a new user from a client
+------------------------------------
+
+By default, registration of new users via Matrix clients is disabled. To enable
+it:
+
+1. In the
+   `registration config section <https://element-hq.github.io/synapse/latest/usage/configuration/config_documentation.html#registration>`_
+   set ``enable_registration: true`` in ``homeserver.yaml``.
+2. Then **either**:
+
+   a. set up a `CAPTCHA <https://element-hq.github.io/synapse/latest/CAPTCHA_SETUP.html>`_, or
+   b. set ``enable_registration_without_verification: true`` in ``homeserver.yaml``.
+
+We **strongly** recommend using a CAPTCHA, particularly if your homeserver is exposed to
+the public internet. Without it, anyone can freely register accounts on your homeserver.
+This can be exploited by attackers to create spambots targeting the rest of the Matrix
+federation.
+
+Your new Matrix ID will be formed partly from the ``server_name``, and partly
+from a localpart you specify when you create the account in the form of::
+
+    @localpart:my.domain.name
+
+(pronounced "at localpart on my dot domain dot name").
+
+As when logging in, you will need to specify a "Custom server".  Specify your
+desired ``localpart`` in the 'Username' box.
 
 🎯 Troubleshooting and support
 ==============================
@@ -60,7 +182,7 @@ Enterprise quality support for Synapse including SLAs is available as part of an
 `Element Server Suite (ESS) <https://element.io/pricing>`_ subscription.
 
 If you are an existing ESS subscriber then you can raise a `support request <https://ems.element.io/support>`_
-and access the `Element product documentation <https://docs.element.io>`_.
+and access the `knowledge base <https://ems-docs.element.io>`_.
 
 🤝 Community support
 --------------------
@@ -79,6 +201,35 @@ issues for support requests, only for bug reports and feature requests.
 .. |docs| replace:: ``docs``
 .. _docs: docs
 
+🪪 Identity Servers
+===================
+
+Identity servers have the job of mapping email addresses and other 3rd Party
+IDs (3PIDs) to Matrix user IDs, as well as verifying the ownership of 3PIDs
+before creating that mapping.
+
+**Identity servers do not store accounts or credentials - these are stored and managed on homeservers.
+Identity Servers are just for mapping 3rd Party IDs to Matrix IDs.**
+
+This process is highly security-sensitive, as there is an obvious risk of spam if it
+is too easy to sign up for Matrix accounts or harvest 3PID data. In the longer
+term, we hope to create a decentralised system to manage it (`matrix-doc #712
+<https://github.com/matrix-org/matrix-doc/issues/712>`_), but in the meantime,
+the role of managing trusted identity in the Matrix ecosystem is farmed out to
+a cluster of known trusted ecosystem partners, who run 'Matrix Identity
+Servers' such as `Sydent <https://github.com/matrix-org/sydent>`_, whose role
+is purely to authenticate and track 3PID logins and publish end-user public
+keys.
+
+You can host your own copy of Sydent, but this will prevent you reaching other
+users in the Matrix ecosystem via their email address, and prevent them finding
+you. We therefore recommend that you use one of the centralised identity servers
+at ``https://matrix.org`` or ``https://vector.im`` for now.
+
+To reiterate: the Identity server will only be used if you choose to associate
+an email address with your account, or send an invite to another user via their
+email address.
+
 
 🛠️ Development
 ==============
@@ -101,29 +252,20 @@ Alongside all that, join our developer community on Matrix:
 Copyright and Licensing
 =======================
 
-  | Copyright 2014–2017 OpenMarket Ltd
+| Copyright 2014-2017 OpenMarket Ltd
 | Copyright 2017 Vector Creations Ltd
-  | Copyright 2017–2025 New Vector Ltd
+| Copyright 2017-2025 New Vector Ltd
-  | Copyright 2025 Element Creations Ltd
+|
 
-This software is dual-licensed by Element Creations Ltd (Element). It can be
+This software is dual-licensed by New Vector Ltd (Element). It can be used either:
-used either:
 
-(1) for free under the terms of the GNU Affero General Public License (as
+(1) for free under the terms of the GNU Affero General Public License (as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version); OR
-    published by the Free Software Foundation, either version 3 of the License,
-    or (at your option) any later version); OR
 
-(2) under the terms of a paid-for Element Commercial License agreement between
+(2) under the terms of a paid-for Element Commercial License agreement between you and Element (the terms of which may vary depending on what you and Element have agreed to).
-    you and Element (the terms of which may vary depending on what you and
-    Element have agreed to).
 
-Unless required by applicable law or agreed to in writing, software distributed
+Unless required by applicable law or agreed to in writing, software distributed under the Licenses is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the Licenses for the specific language governing permissions and limitations under the Licenses.
-under the Licenses is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
-CONDITIONS OF ANY KIND, either express or implied. See the Licenses for the
-specific language governing permissions and limitations under the Licenses.
 
-Please contact `licensing@element.io <mailto:licensing@element.io>`_ to purchase
+Please contact `licensing@element.io <mailto:licensing@element.io>`_ to purchase an Element commercial license for this software.
-an Element commercial license for this software.
 
 
 .. |support| image:: https://img.shields.io/badge/matrix-community%20support-success

changelog.d/18402.misc

@@ -1 +0,0 @@
-Group together dependabot update PRs to reduce the review load.

changelog.d/19187.misc

@@ -1 +0,0 @@
-Fix `HomeServer.shutdown()` failing if the homeserver hasn't been setup yet.

changelog.d/19206.bugfix

@@ -1 +0,0 @@
-Fix sliding sync performance slow down for long lived connections.

changelog.d/19209.misc

@@ -0,0 +1 @@
+Refactor `scripts-dev/complement.sh` logic to avoid `exit` to facilitate being able to source it from other scripts (composable).

changelog.d/19212.misc

@@ -1 +0,0 @@
-Respond with useful error codes with `Content-Length` header/s are invalid.

changelog.d/19231.bugfix

@@ -1 +0,0 @@
-Fix a bug where Mastodon posts (and possibly other embeds) have the wrong description for URL previews.

changelog.d/19232.misc

@@ -1 +0,0 @@
-Fix `HomeServer.shutdown()` failing if the homeserver failed to `start`.

changelog.d/19234.misc

@@ -1 +0,0 @@
-Switch the build backend from `poetry-core` to `maturin`.

changelog.d/19253.misc

@@ -1 +0,0 @@
-Raise the limit for concurrently-open non-security @dependabot PRs from 5 to 10.

changelog.d/19254.removal

@@ -1 +0,0 @@
-Remove the "Updates to locked dependencies" section from the changelog due to lack of use and the maintenance burden.

changelog.d/19258.misc

@@ -1 +0,0 @@
-Require 14 days to pass before pulling in general dependency updates to help mitigate upstream supply chain attacks.

changelog.d/19260.feature

@@ -1 +0,0 @@
-Add `memberships` endpoint to the admin API. This is useful for forensics and T&S purpose.

changelog.d/19262.misc

@@ -1 +0,0 @@
-Drop the broken netlify documentation workflow until a new one is implemented.

changelog.d/19267.bugfix

@@ -1 +0,0 @@
-Fix bug where `Duration` was logged incorrectly.

changelog.d/19268.feature

@@ -1 +0,0 @@
-Add an admin API for retrieving a paginated list of quarantined media.

changelog.d/19270.doc

@@ -1 +0,0 @@
-Document the importance of `public_baseurl` when configuring OpenID Connect authentication.

changelog.d/19274.bugfix

@@ -1 +0,0 @@
-Fix bug introduced in 1.143.0 that broke support for versions of `zope-interface` older than 6.2.

changelog.d/19275.feature

@@ -1 +0,0 @@
-Server admins can bypass the quarantine media check when downloading media by setting the `admin_unsafely_bypass_quarantine` query parameter to `true` on Client-Server API media download requests.

changelog.d/19278.misc

@@ -1 +0,0 @@
-Don't include debug logs in `Clock` unless explicitly enabled.

changelog.d/19279.feature

@@ -1 +0,0 @@
-Implemented pagination for the [MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666) mutual rooms endpoint. Contributed by @tulir @ Beeper.

changelog.d/19281.feature

@@ -1 +0,0 @@
-Admin API: add worker support to `GET /_synapse/admin/v2/users/<user_id>`.

changelog.d/19289.misc

@@ -1 +0,0 @@
-Use `uv` to test olddeps to ensure all transitive dependencies use minimum versions.

changelog.d/19300.feature

@@ -1 +0,0 @@
-Improve proxy support for the `federation_client.py` dev script. Contributed by Denis Kasak (@dkasak).

changelog.d/19302.misc

@@ -1 +0,0 @@
-Unpin the version of Rust we use to build Synapse wheels (was 1.82.0) now that MacOS support has been dropped.

changelog.d/19314.feature

@@ -1 +0,0 @@
-Add experimental support for the [MSC4370](https://github.com/matrix-org/matrix-spec-proposals/pull/4370) Federation API `GET /extremities` endpoint.

debian/changelog

@@ -1,21 +1,3 @@
-matrix-synapse-py3 (1.144.0) stable; urgency=medium
-
-  * New Synapse release 1.144.0.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 09 Dec 2025 08:30:40 -0700
-
-matrix-synapse-py3 (1.144.0~rc1) stable; urgency=medium
-
-  * New Synapse release 1.144.0rc1.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 02 Dec 2025 09:11:19 -0700
-
-matrix-synapse-py3 (1.143.0) stable; urgency=medium
-
-  * New Synapse release 1.143.0.
-
- -- Synapse Packaging team <packages@matrix.org>  Tue, 25 Nov 2025 08:44:56 -0700
-
 matrix-synapse-py3 (1.143.0~rc2) stable; urgency=medium
 
   * New Synapse release 1.143.0rc2.

docker/configure_workers_and_start.py

@@ -196,7 +196,6 @@ WORKERS_CONFIG: dict[str, dict[str, Any]] = {
             "^/_matrix/client/(api/v1|r0|v3|unstable)/keys/upload",
             "^/_matrix/client/(api/v1|r0|v3|unstable)/keys/device_signing/upload$",
             "^/_matrix/client/(api/v1|r0|v3|unstable)/keys/signatures/upload$",
-            "^/_matrix/client/unstable/org.matrix.msc4140/delayed_events(/.*/restart)?$",
         ],
         "shared_extra_conf": {},
         "worker_extra_conf": "",

docs/SUMMARY.md

@@ -5,7 +5,6 @@
 
 # Setup
   - [Installation](setup/installation.md)
-  - [Security](setup/security.md)
   - [Using Postgres](postgres.md)
   - [Configuring a Reverse Proxy](reverse_proxy.md)
   - [Configuring a Forward/Outbound Proxy](setup/forward_proxy.md)

docs/admin_api/media_admin_api.md

@@ -73,33 +73,6 @@ Response:
 }
 ```
 
-## Listing all quarantined media
-
-This API returns a list of all quarantined media on the server. It is paginated, and can be scoped to either local or
-remote media. Note that the pagination values are also scoped to the request parameters - changing them but keeping the
-same pagination values will result in unexpected results.
-
-Request:
-```http
-GET /_synapse/admin/v1/media/quarantined?from=0&limit=100&kind=local
-```
-
-`from` and `limit` are optional parameters, and default to `0` and `100` respectively. They are the row index and number
-of rows to return - they are not timestamps.
-
-`kind` *MUST* either be `local` or `remote`.
-
-The API returns a JSON body containing MXC URIs for the quarantined media, like the following:
-
-```json
-{
-  "media": [
-    "mxc://localhost/xwvutsrqponmlkjihgfedcba",
-    "mxc://localhost/abcdefghijklmnopqrstuvwx"
-  ]
-}
-```
-
 # Quarantine media
 
 Quarantining media means that it is marked as inaccessible by users. It applies
@@ -115,20 +88,6 @@ is quarantined, Synapse will:
  - Quarantine any existing cached remote media.
  - Quarantine any future remote media.
 
-## Downloading quarantined media
-
-Normally, when media is quarantined, it will return a 404 error when downloaded.
-Admins can bypass this by adding `?admin_unsafely_bypass_quarantine=true`
-to the [normal download URL](https://spec.matrix.org/v1.16/client-server-api/#get_matrixclientv1mediadownloadservernamemediaid).
-
-Bypassing the quarantine check is not recommended. Media is typically quarantined
-to prevent harmful content from being served to users, which includes admins. Only
-set the bypass parameter if you intentionally want to access potentially harmful
-content.
-
-Non-admin users cannot bypass quarantine checks, even when specifying the above
-query parameter.
-
 ## Quarantining media by ID
 
 This API quarantines a single piece of local or remote media.

docs/admin_api/user_admin_api.md

@@ -505,55 +505,6 @@ with a body of:
 }
 ```
 
-## List room memberships of a user
-
-Gets a list of room memberships for a specific `user_id`. This
-endpoint differs from
-[`GET /_synapse/admin/v1/users/<user_id>/joined_rooms`](#list-joined-rooms-of-a-user)
-in that it returns rooms with memberships other than "join".
-
-The API is:
-
-```
-GET /_synapse/admin/v1/users/<user_id>/memberships
-```
-
-A response body like the following is returned:
-
-```json
-    {
-        "memberships": {
-            "!DuGcnbhHGaSZQoNQR:matrix.org": "join",
-            "!ZtSaPCawyWtxfWiIy:matrix.org": "leave",
-        }
-    }
-```
-
-which is a list of room membership states for the given user. This endpoint can
-be used with both local and remote users, with the caveat that the homeserver will
-only be aware of the memberships for rooms that one of its local users has joined.
-
-Remote user memberships may also be out of date if all local users have since left
-a room. The homeserver will thus no longer receive membership updates about it.
-
-The list includes rooms that the user has since left; other membership states (knock,
-invite, etc.) are also possible.
-
-Note that rooms will only disappear from this list if they are
-[purged](./rooms.md#delete-room-api) from the homeserver.
-
-**Parameters**
-
-The following parameters should be set in the URL:
-
-- `user_id` - fully qualified: for example, `@user:server.com`.
-
-**Response**
-
-The following fields are returned in the JSON response body:
-
-- `memberships` - A map of `room_id` (string) to `membership` state (string).
-
 ## List joined rooms of a user
 
 Gets a list of all `room_id` that a specific `user_id` is joined to and is a member of (participating in).

docs/openid.md

@@ -50,11 +50,6 @@ setting in your configuration file.
 See the [configuration manual](usage/configuration/config_documentation.md#oidc_providers) for some sample settings, as well as
 the text below for example configurations for specific providers.
 
-For setups using [`.well-known` delegation](delegate.md), make sure
-[`public_baseurl`](usage/configuration/config_documentation.md#public_baseurl) is set
-appropriately. If unset, Synapse defaults to `https://<server_name>/` which is used in
-the OIDC callback URL.
-
 ## OIDC Back-Channel Logout
 
 Synapse supports receiving [OpenID Connect Back-Channel Logout](https://openid.net/specs/openid-connect-backchannel-1_0.html) notifications.

docs/setup/installation.md

@@ -16,15 +16,8 @@ that your email address is probably `user@example.com` rather than
 `user@email.example.com`) - but doing so may require more advanced setup: see
 [Setting up Federation](../federate.md).
 
-⚠️ Before setting up Synapse please consult the [security page](security.md) for
-best practices. ⚠️
-
 ## Installing Synapse
 
-Note: Synapse uses a number of platform dependencies such as Python and PostgreSQL,
-and aims to follow supported upstream versions. See the [deprecation
-policy](../deprecation_policy.md) for more details.
-
 ### Prebuilt packages
 
 Prebuilt packages are available for a number of platforms. These are recommended

docs/setup/security.md

@@ -1,41 +0,0 @@
-# Security
-
-This page lays out security best-practices when running Synapse.
-
-If you believe you have encountered a security issue, see our [Security
-Disclosure Policy](https://element.io/en/security/security-disclosure-policy).
-
-## Content repository
-
-Matrix serves raw, user-supplied data in some APIs — specifically the [content
-repository endpoints](https://matrix.org/docs/spec/client_server/latest.html#get-matrix-media-r0-download-servername-mediaid).
-
-Whilst we make a reasonable effort to mitigate against XSS attacks (for
-instance, by using [CSP](https://github.com/matrix-org/synapse/pull/1021)), a
-Matrix homeserver should not be hosted on a domain hosting other web
-applications. This especially applies to sharing the domain with Matrix web
-clients and other sensitive applications like webmail. See
-https://developer.github.com/changes/2014-04-25-user-content-security for more
-information.
-
-Ideally, the homeserver should not simply be on a different subdomain, but on a
-completely different [registered
-domain](https://tools.ietf.org/html/draft-ietf-httpbis-rfc6265bis-03#section-2.3)
-(also known as top-level site or eTLD+1). This is because [some
-attacks](https://en.wikipedia.org/wiki/Session_fixation#Attacks_using_cross-subdomain_cookie)
-are still possible as long as the two applications share the same registered
-domain.
-
-
-To illustrate this with an example, if your Element Web or other sensitive web
-application is hosted on `A.example1.com`, you should ideally host Synapse on
-`example2.com`. Some amount of protection is offered by hosting on
-`B.example1.com` instead, so this is also acceptable in some scenarios.
-However, you should *not* host your Synapse on `A.example1.com`.
-
-Note that all of the above refers exclusively to the domain used in Synapse's
-`public_baseurl` setting. In particular, it has no bearing on the domain
-mentioned in MXIDs hosted on that server.
-
-Following this advice ensures that even if an XSS is found in Synapse, the
-impact to other applications will be minimal.

docs/upgrade.md

@@ -117,25 +117,6 @@ each upgrade are complete before moving on to the next upgrade, to avoid
 stacking them up. You can monitor the currently running background updates with
 [the Admin API](usage/administration/admin_api/background_updates.html#status).
 
-# Upgrading to v1.144.0
-
-## Worker support for unstable MSC4140 `/restart` endpoint
-
-The following unstable endpoint pattern may now be routed to worker processes:
-
-```
-^/_matrix/client/unstable/org.matrix.msc4140/delayed_events/.*/restart$
-```
-
-## Unstable mutual rooms endpoint is now behind an experimental feature flag
-
-The unstable mutual rooms endpoint from
-[MSC2666](https://github.com/matrix-org/matrix-spec-proposals/pull/2666)
-(`/_matrix/client/unstable/uk.half-shot.msc2666/user/mutual_rooms`) is now
-disabled by default.  If you rely on this unstable endpoint, you must now set
-`experimental_features.msc2666_enabled: true` in your configuration to keep
-using it.
-
 # Upgrading to v1.143.0
 
 ## Dropping support for PostgreSQL 13

docs/workers.md

@@ -255,8 +255,6 @@ information.
     ^/_matrix/client/(api/v1|r0|v3|unstable)/directory/room/.*$
     ^/_matrix/client/(r0|v3|unstable)/capabilities$
     ^/_matrix/client/(r0|v3|unstable)/notifications$
-
-    # Admin API requests
     ^/_synapse/admin/v1/rooms/[^/]+$
 
     # Encryption requests
@@ -287,13 +285,10 @@ information.
     # User directory search requests
     ^/_matrix/client/(r0|v3|unstable)/user_directory/search$
 
-    # Unstable MSC4140 support
-    ^/_matrix/client/unstable/org.matrix.msc4140/delayed_events(/.*/restart)?$
-
 Additionally, the following REST endpoints can be handled for GET requests:
 
-    # Push rules requests
     ^/_matrix/client/(api/v1|r0|v3|unstable)/pushrules/
+    ^/_matrix/client/unstable/org.matrix.msc4140/delayed_events
 
     # Account data requests
     ^/_matrix/client/(r0|v3|unstable)/.*/tags
@@ -302,9 +297,6 @@ Additionally, the following REST endpoints can be handled for GET requests:
     # Presence requests
     ^/_matrix/client/(api/v1|r0|v3|unstable)/presence/
 
-    # Admin API requests
-    ^/_synapse/admin/v2/users/[^/]+$
-
 Pagination requests can also be handled, but all requests for a given
 room must be routed to the same instance. Additionally, care must be taken to
 ensure that the purge history admin API is not used while pagination requests

pyproject.toml

@@ -1,6 +1,6 @@
 [project]
 name = "matrix-synapse"
-version = "1.144.0"
+version = "1.143.0rc2"
 description = "Homeserver for the Matrix decentralised comms protocol"
 readme = "README.rst"
 authors = [
@@ -42,8 +42,7 @@ dependencies = [
     "Twisted[tls]>=21.2.0",
     "treq>=21.5.0",
     # Twisted has required pyopenssl 16.0 since about Twisted 16.6.
-    # pyOpenSSL 16.2.0 fixes compatibility with OpenSSL 1.1.0. 
+    "pyOpenSSL>=16.0.0",
-    "pyOpenSSL>=16.2.0",
     "PyYAML>=5.3",
     "pyasn1>=0.1.9",
     "pyasn1-modules>=0.0.7",
@@ -96,25 +95,6 @@ dependencies = [
 
     # This is used for parsing multipart responses
     "python-multipart>=0.0.9",
-
-    # Transitive dependency constraints
-    # These dependencies aren't directly required by Synapse.
-    # However, in order for Synapse to build, Synapse requires a higher minimum version
-    # for these dependencies than the minimum specified by the direct dependency.
-    # We should periodically check to see if these dependencies are still necessary and
-    # remove any that are no longer required.
-    "cffi>=1.15", # via cryptography
-    "pynacl>=1.3", # via signedjson
-    "pyparsing>=2.4",  # via packaging
-    "pyrsistent>=0.18.0",  # via jsonschema
-    "requests>=2.16.0", # 2.16.0+ no longer vendors urllib3, avoiding Python 3.10+ incompatibility
-    "urllib3>=1.26.5", # via treq; 1.26.5 fixes Python 3.10+ collections.abc compatibility
-    # 5.2 is the current version in Debian oldstable. If we don't care to support that, then 5.4 is
-    # the minimum version from Ubuntu 22.04 and RHEL 9. (as of 2025-12)
-    # When bumping this version to 6.2 or above, refer to https://github.com/element-hq/synapse/pull/19274
-    # for details of Synapse improvements that may be unlocked. Particularly around the use of `|`
-    # syntax with zope interface types.
-    "zope-interface>=5.2", # via twisted
 ]
 
 [project.optional-dependencies]
@@ -124,16 +104,7 @@ postgres = [
     "psycopg2cffi>=2.8;platform_python_implementation == 'PyPy'",
     "psycopg2cffi-compat==1.1;platform_python_implementation == 'PyPy'",
 ]
-saml2 = [
+saml2 = ["pysaml2>=4.5.0"]
-    "pysaml2>=4.5.0",
-
-    # Transitive dependencies from pysaml2
-    # These dependencies aren't directly required by Synapse.
-    # However, in order for Synapse to build, Synapse requires a higher minimum version
-    # for these dependencies than the minimum specified by the direct dependency.
-    "defusedxml>=0.7.1", # via pysaml2
-    "pytz>=2018.3",  # via pysaml2
-]
 oidc = ["authlib>=0.15.1"]
 # systemd-python is necessary for logging to the systemd journal via
 # `systemd.journal.JournalHandler`, as is documented in
@@ -141,25 +112,15 @@ oidc = ["authlib>=0.15.1"]
 systemd = ["systemd-python>=231"]
 url-preview = ["lxml>=4.6.3"]
 sentry = ["sentry-sdk>=0.7.2"]
-opentracing = [
+opentracing = ["jaeger-client>=4.2.0", "opentracing>=2.2.0"]
-    "jaeger-client>=4.2.0",
-    "opentracing>=2.2.0",
-
-    # Transitive dependencies from jaeger-client
-    # These dependencies aren't directly required by Synapse.
-    # However, in order for Synapse to build, Synapse requires a higher minimum version
-    # for these dependencies than the minimum specified by the direct dependency.
-    "thrift>=0.10",  # via jaeger-client
-    "tornado>=6.0",  # via jaeger-client
-]
 jwt = ["authlib"]
 # hiredis is not a *strict* dependency, but it makes things much faster.
 # (if it is not installed, we fall back to slow code.)
-redis = ["txredisapi>=1.4.7", "hiredis>=0.3"]
+redis = ["txredisapi>=1.4.7", "hiredis"]
 # Required to use experimental `caches.track_memory_usage` config option.
-cache-memory = ["pympler>=1.0"]
+cache-memory = ["pympler"]
 # If this is updated, don't forget to update the equivalent lines in
-# `dependency-groups.dev` below.
+# tool.poetry.group.dev.dependencies.
 test = ["parameterized>=0.9.0", "idna>=3.3"]
 
 # The duplication here is awful.
@@ -188,22 +149,12 @@ all = [
     # opentracing
     "jaeger-client>=4.2.0", "opentracing>=2.2.0",
     # redis
-    "txredisapi>=1.4.7", "hiredis>=0.3",
+    "txredisapi>=1.4.7", "hiredis",
     # cache-memory
-    # 1.0 added support for python 3.10, our current minimum supported python version
+    "pympler",
-    "pympler>=1.0",
     # omitted:
     #   - test: it's useful to have this separate from dev deps in the olddeps job
     #   - systemd: this is a system-based requirement
-
-    # Transitive dependencies
-    # These dependencies aren't directly required by Synapse.
-    # However, in order for Synapse to build, Synapse requires a higher minimum version
-    # for these dependencies than the minimum specified by the direct dependency.
-    "defusedxml>=0.7.1", # via pysaml2
-    "pytz>=2018.3",  # via pysaml2
-    "thrift>=0.10",  # via jaeger-client
-    "tornado>=6.0",  # via jaeger-client
 ]
 
 [project.urls]
@@ -226,85 +177,6 @@ synapse_port_db = "synapse._scripts.synapse_port_db:main"
 synapse_review_recent_signups = "synapse._scripts.review_recent_signups:main"
 update_synapse_database = "synapse._scripts.update_synapse_database:main"
 
-[tool.poetry]
-packages = [{ include = "synapse" }]
-
-[tool.poetry.build]
-# Compile our rust module when using `poetry install`. This is still required
-# while using `poetry` as the build frontend. Saves the developer from needing
-# to run both:
-#
-# $ poetry install
-# $ maturin develop
-script = "build_rust.py"
-# Create a `setup.py` file which will call the `build` method in our build
-# script.
-#
-# Our build script currently uses the "old" build method, where we define a
-# `build` method and `setup.py` calls it. Poetry developers have mentioned that
-# this will eventually be removed:
-# https://github.com/matrix-org/synapse/pull/14949#issuecomment-1418001859
-#
-# The new build method is defined here:
-# https://python-poetry.org/docs/building-extension-modules/#maturin-build-script
-# but is still marked as "unstable" at the time of writing. This would also
-# bump our minimum `poetry-core` version to 1.5.0.
-#
-# We can just drop this work-around entirely if migrating away from
-# Poetry, thus there's little motivation to update the build script.
-generate-setup-file = true
-
-# Dependencies used for developing Synapse itself.
-#
-# Hold off on migrating these to `dev-dependencies` (PEP 735) for now until
-# Poetry 2.2.0+, pip 25.1+ are more widely available.
-[tool.poetry.group.dev.dependencies]
-# We pin development dependencies in poetry.lock so that our tests don't start
-# failing on new releases. Keeping lower bounds loose here means that dependabot
-# can bump versions without having to update the content-hash in the lockfile.
-# This helps prevents merge conflicts when running a batch of dependabot updates.
-ruff = "0.14.6"
-
-# Typechecking
-lxml-stubs = ">=0.4.0"
-mypy = "*"
-mypy-zope = "*"
-types-bleach = ">=4.1.0"
-types-jsonschema = ">=3.2.0"
-types-netaddr = ">=0.8.0.6"
-types-opentracing = ">=2.4.2"
-types-Pillow = ">=8.3.4"
-types-psycopg2 = ">=2.9.9"
-types-pyOpenSSL = ">=20.0.7"
-types-PyYAML = ">=5.4.10"
-types-requests = ">=2.26.0"
-types-setuptools = ">=57.4.0"
-
-# Dependencies which are exclusively required by unit test code. This is
-# NOT a list of all modules that are necessary to run the unit tests.
-# Tests assume that all optional dependencies are installed.
-#
-# If this is updated, don't forget to update the equivalent lines in
-# project.optional-dependencies.test.
-parameterized = ">=0.9.0"
-idna = ">=3.3"
-
-# The following are used by the release script
-click = ">=8.1.3"
-# GitPython was == 3.1.14; bumped to 3.1.20, the first release with type hints.
-GitPython = ">=3.1.20"
-markdown-it-py = ">=3.0.0"
-pygithub = ">=1.59"
-# The following are executed as commands by the release script.
-twine = "*"
-# Towncrier min version comes from https://github.com/matrix-org/synapse/pull/3425. Rationale unclear.
-towncrier = ">=18.6.0rc1"
-
-# Used for checking the Poetry lockfile
-tomli = ">=1.2.3"
-
-# Used for checking the schema delta files
-sqlglot = ">=28.0.0"
 
 [tool.towncrier]
     package = "synapse"
@@ -388,12 +260,15 @@ select = [
     "G",
     # pyupgrade
     "UP006",
+    "UP007",
+    "UP045",
 ]
 extend-safe-fixes = [
     # pyupgrade rules compatible with Python >= 3.9
     "UP006",
-    # Allow ruff to automatically fix trailing spaces within a multi-line string/comment.
+    "UP007",
-    "W293"
+    # pyupgrade rules compatible with Python >= 3.10
+    "UP045",
 ]
 
 [tool.ruff.lint.isort]
@@ -414,29 +289,85 @@ line-ending = "auto"
 [tool.maturin]
 manifest-path = "rust/Cargo.toml"
 module-name = "synapse.synapse_rust"
-python-source = "."
+
-sdist-include = [
+[tool.poetry]
-    "AUTHORS.rst",
+packages = [
-    "book.toml",
+    { include = "synapse" },
-    "changelog.d",
-    "CHANGES.md",
-    "CONTRIBUTING.md",
-    "demo",
-    "docs",
-    "INSTALL.md",
-    "mypy.ini",
-    "scripts-dev",
-    "synmark",
-    "sytest-blacklist",
-    "tests",
-    "UPGRADE.rst",
-    "Cargo.toml",
-    "Cargo.lock",
-    "rust/Cargo.toml",
-    "rust/build.rs",
-    "rust/src/**",
 ]
-sdist-exclude = ["synapse/*.so"]
+include = [
+    { path = "AUTHORS.rst", format = "sdist" },
+    { path = "book.toml", format = "sdist" },
+    { path = "changelog.d", format = "sdist" },
+    { path = "CHANGES.md", format = "sdist" },
+    { path = "CONTRIBUTING.md", format = "sdist" },
+    { path = "demo", format = "sdist" },
+    { path = "docs", format = "sdist" },
+    { path = "INSTALL.md", format = "sdist" },
+    { path = "mypy.ini", format = "sdist" },
+    { path = "scripts-dev", format = "sdist" },
+    { path = "synmark", format="sdist" },
+    { path = "sytest-blacklist", format = "sdist" },
+    { path = "tests", format = "sdist" },
+    { path = "UPGRADE.rst", format = "sdist" },
+    { path = "Cargo.toml", format = "sdist" },
+    { path = "Cargo.lock", format = "sdist" },
+    { path = "rust/Cargo.toml", format = "sdist" },
+    { path = "rust/build.rs", format = "sdist" },
+    { path = "rust/src/**", format = "sdist" },
+]
+exclude = [
+    { path = "synapse/*.so", format = "sdist"}
+]
+
+[tool.poetry.build]
+script = "build_rust.py"
+generate-setup-file = true
+
+[tool.poetry.group.dev.dependencies]
+# We pin development dependencies in poetry.lock so that our tests don't start
+# failing on new releases. Keeping lower bounds loose here means that dependabot
+# can bump versions without having to update the content-hash in the lockfile.
+# This helps prevents merge conflicts when running a batch of dependabot updates.
+ruff = "0.14.5"
+
+# Typechecking
+lxml-stubs = ">=0.4.0"
+mypy = "*"
+mypy-zope = "*"
+types-bleach = ">=4.1.0"
+types-jsonschema = ">=3.2.0"
+types-netaddr = ">=0.8.0.6"
+types-opentracing = ">=2.4.2"
+types-Pillow = ">=8.3.4"
+types-psycopg2 = ">=2.9.9"
+types-pyOpenSSL = ">=20.0.7"
+types-PyYAML = ">=5.4.10"
+types-requests = ">=2.26.0"
+types-setuptools = ">=57.4.0"
+
+# Dependencies which are exclusively required by unit test code. This is
+# NOT a list of all modules that are necessary to run the unit tests.
+# Tests assume that all optional dependencies are installed.
+#
+# If this is updated, don't forget to update the equivalent lines in
+# project.optional-dependencies.test.
+parameterized = ">=0.9.0"
+idna = ">=3.3"
+
+# The following are used by the release script
+click = ">=8.1.3"
+# GitPython was == 3.1.14; bumped to 3.1.20, the first release with type hints.
+GitPython = ">=3.1.20"
+markdown-it-py = ">=3.0.0"
+pygithub = ">=1.59"
+# The following are executed as commands by the release script.
+twine = "*"
+# Towncrier min version comes from https://github.com/matrix-org/synapse/pull/3425. Rationale unclear.
+towncrier = ">=18.6.0rc1"
+
+# Used for checking the Poetry lockfile
+tomli = ">=1.2.3"
+
 
 [build-system]
 # The upper bounds here are defensive, intended to prevent situations like
@@ -445,8 +376,8 @@ sdist-exclude = ["synapse/*.so"]
 # runtime errors caused by build system changes.
 # We are happy to raise these upper bounds upon request,
 # provided we check that it's safe to do so (i.e. that CI passes).
-requires = ["maturin>=1.0,<2.0"]
+requires = ["poetry-core>=2.0.0,<=2.1.3", "setuptools_rust>=1.3,<=1.11.1"]
-build-backend = "maturin"
+build-backend = "poetry.core.masonry.api"
 
 
 [tool.cibuildwheel]
@@ -462,8 +393,7 @@ build-backend = "maturin"
 # We skip:
 #  - free-threaded cpython builds: these are not currently supported.
 #  - i686: We don't support 32-bit platforms.
-#  - *macosx*: we don't support building wheels for MacOS.
+skip = "cp3??t-* *i686*"
-skip = "cp3??t-* *i686* *macosx*"
 # Enable non-default builds. See the list of available options:
 # https://cibuildwheel.pypa.io/en/stable/options#enable
 #
@@ -471,6 +401,9 @@ skip = "cp3??t-* *i686* *macosx*"
 enable = "pypy"
 
 # We need a rust compiler.
+#
+# We temporarily pin Rust to 1.82.0 to work around
+# https://github.com/element-hq/synapse/issues/17988
 before-all =  "sh .ci/before_build_wheel.sh"
 environment= { PATH = "$PATH:$HOME/.cargo/bin" }
 
@@ -480,3 +413,12 @@ environment= { PATH = "$PATH:$HOME/.cargo/bin" }
 before-build = "rm -rf {project}/build"
 build-frontend = "build"
 test-command = "python -c 'from synapse.synapse_rust import sum_as_string; print(sum_as_string(1, 2))'"
+
+
+[tool.cibuildwheel.linux]
+# Wrap the repair command to correctly rename the built cpython wheels as ABI3.
+repair-wheel-command = "./.ci/scripts/auditwheel_wrapper.py -w {dest_dir} {wheel}"
+
+[tool.cibuildwheel.macos]
+# Wrap the repair command to correctly rename the built cpython wheels as ABI3.
+repair-wheel-command = "./.ci/scripts/auditwheel_wrapper.py --require-archs {delocate_archs} -w {dest_dir} {wheel}"

rust/src/duration.rs

@@ -1,56 +0,0 @@
-/*
- * This file is licensed under the Affero General Public License (AGPL) version 3.
- *
- * Copyright (C) 2025 Element Creations, Ltd
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU Affero General Public License as
- * published by the Free Software Foundation, either version 3 of the
- * License, or (at your option) any later version.
- *
- * See the GNU Affero General Public License for more details:
- * <https://www.gnu.org/licenses/agpl-3.0.html>.
- */
-
-use once_cell::sync::OnceCell;
-use pyo3::{
-    types::{IntoPyDict, PyAnyMethods},
-    Bound, BoundObject, IntoPyObject, Py, PyAny, PyErr, PyResult, Python,
-};
-
-/// A reference to the `synapse.util.duration` module.
-static DURATION: OnceCell<Py<PyAny>> = OnceCell::new();
-
-/// Access to the `synapse.util.duration` module.
-fn duration_module(py: Python<'_>) -> PyResult<&Bound<'_, PyAny>> {
-    Ok(DURATION
-        .get_or_try_init(|| py.import("synapse.util.duration").map(Into::into))?
-        .bind(py))
-}
-
-/// Mirrors the `synapse.util.duration.Duration` Python class.
-pub struct SynapseDuration {
-    microseconds: u64,
-}
-
-impl SynapseDuration {
-    /// For now we only need to create durations from milliseconds.
-    pub fn from_milliseconds(milliseconds: u64) -> Self {
-        Self {
-            microseconds: milliseconds * 1_000,
-        }
-    }
-}
-
-impl<'py> IntoPyObject<'py> for &SynapseDuration {
-    type Target = PyAny;
-    type Output = Bound<'py, Self::Target>;
-    type Error = PyErr;
-
-    fn into_pyobject(self, py: Python<'py>) -> Result<Self::Output, Self::Error> {
-        let duration_module = duration_module(py)?;
-        let kwargs = [("microseconds", self.microseconds)].into_py_dict(py)?;
-        let duration_instance = duration_module.call_method("Duration", (), Some(&kwargs))?;
-        Ok(duration_instance.into_bound())
-    }
-}

rust/src/lib.rs

@@ -5,7 +5,6 @@ use pyo3::prelude::*;
 use pyo3_log::ResetHandle;
 
 pub mod acl;
-pub mod duration;
 pub mod errors;
 pub mod events;
 pub mod http;

rust/src/rendezvous/mod.rs

@@ -35,7 +35,6 @@ use ulid::Ulid;
 
 use self::session::Session;
 use crate::{
-    duration::SynapseDuration,
     errors::{NotFoundError, SynapseError},
     http::{http_request_from_twisted, http_response_to_twisted, HeaderMapPyExt},
     UnwrapInfallible,
@@ -133,8 +132,6 @@ impl RendezvousHandler {
             .unwrap_infallible()
             .unbind();
 
-        let eviction_duration = SynapseDuration::from_milliseconds(eviction_interval);
-
         // Construct a Python object so that we can get a reference to the
         // evict method and schedule it to run.
         let self_ = Py::new(
@@ -152,7 +149,7 @@ impl RendezvousHandler {
         let evict = self_.getattr(py, "_evict")?;
         homeserver.call_method0("get_clock")?.call_method(
             "looping_call",
-            (evict, &eviction_duration),
+            (evict, eviction_interval),
             None,
         )?;
 

schema/synapse-config.schema.yaml

@@ -1,5 +1,5 @@
 $schema: https://element-hq.github.io/synapse/latest/schema/v1/meta.schema.json
-$id: https://element-hq.github.io/synapse/schema/synapse/v1.144/synapse-config.schema.json
+$id: https://element-hq.github.io/synapse/schema/synapse/v1.143/synapse-config.schema.json
 type: object
 properties:
   modules:

scripts-dev/check_schema_delta.py

@@ -9,10 +9,15 @@ from typing import Any
 
 import click
 import git
-import sqlglot
-import sqlglot.expressions
 
 SCHEMA_FILE_REGEX = re.compile(r"^synapse/storage/schema/(.*)/delta/(.*)/(.*)$")
+INDEX_CREATION_REGEX = re.compile(
+    r"CREATE .*INDEX .*ON ([a-z_0-9]+)", flags=re.IGNORECASE
+)
+INDEX_DELETION_REGEX = re.compile(r"DROP .*INDEX ([a-z_0-9]+)", flags=re.IGNORECASE)
+TABLE_CREATION_REGEX = re.compile(
+    r"CREATE .*TABLE.* ([a-z_0-9]+)\s*\(", flags=re.IGNORECASE
+)
 
 # The base branch we want to check against. We use the main development branch
 # on the assumption that is what we are developing against.
@@ -136,9 +141,6 @@ def main(force_colors: bool) -> None:
             color=force_colors,
         )
 
-        # Mark this run as not successful, but continue so that we report *all*
-        # errors.
-        return_code = 1
     else:
         click.secho(
             f"All deltas are in the correct folder: {current_schema_version}!",
@@ -151,79 +153,31 @@ def main(force_colors: bool) -> None:
     # and delta files are also numbered in order.
     changed_delta_files.sort()
 
-    success = check_schema_delta(changed_delta_files, force_colors)
+    # Now check that we're not trying to create or drop indices. If we want to
-    if not success:
+    # do that they should be in background updates. The exception is when we
-        return_code = 1
+    # create indices on tables we've just created.
-
+    created_tables = set()
-    click.get_current_context().exit(return_code)
+    for delta_file in changed_delta_files:
-
-
-def check_schema_delta(delta_files: list[str], force_colors: bool) -> bool:
-    """Check that the given schema delta files do not create or drop indices
-    inappropriately.
-
-    Index creation is only allowed on tables created in the same set of deltas.
-
-    Index deletion is never allowed and should be done in background updates.
-
-    Returns:
-        True if all checks succeeded, False if at least one failed.
-    """
-
-    # The tables created in this delta
-    created_tables = set[str]()
-
-    # The indices created/dropped in this delta, each a tuple of (table_name, sql)
-    created_indices = list[tuple[str, str]]()
-
-    # The indices dropped in this delta, just the sql
-    dropped_indices = list[str]()
-
-    for delta_file in delta_files:
         with open(delta_file) as fd:
-            delta_contents = fd.read()
+            delta_lines = fd.readlines()
 
-        # Assume the SQL dialect from the file extension, defaulting to Postgres.
+        for line in delta_lines:
-        sql_lang = "postgres"
+            # Strip SQL comments
-        if delta_file.endswith(".sqlite"):
+            line = line.split("--", maxsplit=1)[0]
-            sql_lang = "sqlite"
 
-        statements = sqlglot.parse(delta_contents, read=sql_lang)
+            # Check and track any tables we create
-
+            match = TABLE_CREATION_REGEX.search(line)
-        for statement in statements:
+            if match:
-            if isinstance(statement, sqlglot.expressions.Create):
+                table_name = match.group(1)
-                if statement.kind == "TABLE":
-                    assert isinstance(statement.this, sqlglot.expressions.Schema)
-                    assert isinstance(statement.this.this, sqlglot.expressions.Table)
-
-                    table_name = statement.this.this.name
                 created_tables.add(table_name)
-                elif statement.kind == "INDEX":
-                    assert isinstance(statement.this, sqlglot.expressions.Index)
 
-                    table_name = statement.this.args["table"].name
+            # Check for dropping indices, these are always banned
-                    created_indices.append((table_name, statement.sql()))
+            match = INDEX_DELETION_REGEX.search(line)
-            elif isinstance(statement, sqlglot.expressions.Drop):
+            if match:
-                if statement.kind == "INDEX":
+                clause = match.group()
-                    dropped_indices.append(statement.sql())
 
-    success = True
-    for table_name, clause in created_indices:
-        if table_name not in created_tables:
                 click.secho(
-                f"Found delta with index creation for existing table: '{clause}'",
+                    f"Found delta with index deletion: '{clause}' in {delta_file}",
-                fg="red",
-                bold=True,
-                color=force_colors,
-            )
-            click.secho(
-                " ↪ These should be in background updates (or the table should be created in the same delta).",
-            )
-            success = False
-
-    for clause in dropped_indices:
-        click.secho(
-            f"Found delta with index deletion: '{clause}'",
                     fg="red",
                     bold=True,
                     color=force_colors,
@@ -231,9 +185,27 @@ def check_schema_delta(delta_files: list[str], force_colors: bool) -> bool:
                 click.secho(
                     " ↪ These should be in background updates.",
                 )
-        success = False
+                return_code = 1
 
-    return success
+            # Check for index creation, which is only allowed for tables we've
+            # created.
+            match = INDEX_CREATION_REGEX.search(line)
+            if match:
+                clause = match.group()
+                table_name = match.group(1)
+                if table_name not in created_tables:
+                    click.secho(
+                        f"Found delta with index creation for existing table: '{clause}' in {delta_file}",
+                        fg="red",
+                        bold=True,
+                        color=force_colors,
+                    )
+                    click.secho(
+                        " ↪ These should be in background updates (or the table should be created in the same delta).",
+                    )
+                    return_code = 1
+
+    click.get_current_context().exit(return_code)
 
 
 if __name__ == "__main__":

scripts-dev/complement.sh

@@ -72,12 +72,6 @@ For help on arguments to 'go test', run 'go help testflag'.
 EOF
 }
 
-# We use a function to wrap the script logic so that we can use `return` to exit early
-# if needed. This is particularly useful so that this script can be sourced by other
-# scripts without exiting the calling subshell (composable). This allows us to share
-# variables like `SYNAPSE_SUPPORTED_COMPLEMENT_TEST_PACKAGES` with other scripts.
-#
-# Returns an exit code of 0 on success, or 1 on failure.
 main() {
   # parse our arguments
   skip_docker_build=""
@@ -210,12 +204,21 @@ main() {
       echo_if_github "::endgroup::"
 
     fi
-  
-    echo "Docker images built."
-  else
-    echo "Skipping Docker image build as requested."
   fi
 
+  if [ -n "$skip_complement_run" ]; then
+      echo "Skipping Complement run as requested."
+      return 0
+  fi
+
+  export COMPLEMENT_BASE_IMAGE=complement-synapse
+  if [ -n "$use_editable_synapse" ]; then
+    export COMPLEMENT_BASE_IMAGE=complement-synapse-editable
+    export COMPLEMENT_HOST_MOUNTS="$editable_mount"
+  fi
+
+  extra_test_args=()
+
   test_packages=(
     ./tests/csapi
     ./tests
@@ -231,16 +234,6 @@ main() {
     ./tests/msc4306
   )
 
-  # Export the list of test packages as a space-separated environment variable, so other
-  # scripts can use it.
-  export SYNAPSE_SUPPORTED_COMPLEMENT_TEST_PACKAGES="${test_packages[@]}"
-
-  export COMPLEMENT_BASE_IMAGE=complement-synapse
-  if [ -n "$use_editable_synapse" ]; then
-    export COMPLEMENT_BASE_IMAGE=complement-synapse-editable
-    export COMPLEMENT_HOST_MOUNTS="$editable_mount"
-  fi
-
   # Enable dirty runs, so tests will reuse the same container where possible.
   # This significantly speeds up tests, but increases the possibility of test pollution.
   export COMPLEMENT_ENABLE_DIRTY_RUNS=1
@@ -249,18 +242,8 @@ main() {
   # (The prefix is stripped off before reaching the container.)
   export COMPLEMENT_SHARE_ENV_PREFIX=PASS_
 
-  # * -count=1: Only run tests once, and disable caching for tests.
-  # * -v: Output test logs, even if those tests pass.
-  # * -tags=synapse_blacklist: Enable the `synapse_blacklist` build tag, which is
-  #   necessary for `runtime.Synapse` checks/skips to work in the tests
-  test_args=(
-    -v
-    -tags="synapse_blacklist"
-    -count=1
-  )
-
   # It takes longer than 10m to run the whole suite.
-  test_args+=("-timeout=60m")
+  extra_test_args+=("-timeout=60m")
 
   if [[ -n "$WORKERS" ]]; then
     # Use workers.
@@ -312,15 +295,11 @@ main() {
   # particularly tricky.
   export PASS_SYNAPSE_LOG_TESTING=1
 
-  if [ -n "$skip_complement_run" ]; then
-    echo "Skipping Complement run as requested."
-    return 0
-  fi
-  
   # Run the tests!
-  echo "Running Complement with ${test_args[@]} $@ ${test_packages[@]}"
+  echo "Images built; running complement with ${extra_test_args[@]} $@ ${test_packages[@]}"
   cd "$COMPLEMENT_DIR"
-  go test "${test_args[@]}" "$@" "${test_packages[@]}"
+
+  go test -v -tags "synapse_blacklist" -count=1 "${extra_test_args[@]}" "$@" "${test_packages[@]}"
 }
 
 main "$@"

scripts-dev/federation_client.py

@@ -145,7 +145,7 @@ def request(
     print("Requesting %s" % dest, file=sys.stderr)
 
     s = requests.Session()
-    s.mount("matrix-federation://", MatrixConnectionAdapter(verify_tls=verify_tls))
+    s.mount("matrix-federation://", MatrixConnectionAdapter())
 
     headers: dict[str, str] = {
         "Authorization": authorization_headers[0],
@@ -267,17 +267,6 @@ def read_args_from_config(args: argparse.Namespace) -> None:
 
 
 class MatrixConnectionAdapter(HTTPAdapter):
-    """
-    A Matrix federation-aware HTTP Adapter.
-    """
-
-    verify_tls: bool
-    """whether to verify the remote server's TLS certificate."""
-
-    def __init__(self, verify_tls: bool = True) -> None:
-        self.verify_tls = verify_tls
-        super().__init__()
-
     def send(
         self,
         request: PreparedRequest,
@@ -291,7 +280,7 @@ class MatrixConnectionAdapter(HTTPAdapter):
         assert isinstance(request.url, str)
         parsed = urlparse.urlsplit(request.url)
         server_name = parsed.netloc
-        well_known = self._get_well_known(parsed.netloc, verify_tls=self.verify_tls)
+        well_known = self._get_well_known(parsed.netloc)
 
         if well_known:
             server_name = well_known
@@ -329,21 +318,6 @@ class MatrixConnectionAdapter(HTTPAdapter):
         print(
             f"Connecting to {host}:{port} with SNI {ssl_server_name}", file=sys.stderr
         )
-
-        if proxies:
-            scheme = parsed.scheme
-            if isinstance(scheme, bytes):
-                scheme = scheme.decode("utf-8")
-
-            proxy_for_scheme = proxies.get(scheme)
-            if proxy_for_scheme:
-                return self.proxy_manager_for(proxy_for_scheme).connection_from_host(
-                    host,
-                    port=port,
-                    scheme="https",
-                    pool_kwargs={"server_hostname": ssl_server_name},
-                )
-
         return self.poolmanager.connection_from_host(
             host,
             port=port,
@@ -394,7 +368,7 @@ class MatrixConnectionAdapter(HTTPAdapter):
             return server_name, 8448, server_name
 
     @staticmethod
-    def _get_well_known(server_name: str, verify_tls: bool = True) -> str | None:
+    def _get_well_known(server_name: str) -> str | None:
         if ":" in server_name:
             # explicit port, or ipv6 literal. Either way, no .well-known
             return None
@@ -405,7 +379,7 @@ class MatrixConnectionAdapter(HTTPAdapter):
         print(f"fetching {uri}", file=sys.stderr)
 
         try:
-            resp = requests.get(uri, verify=verify_tls)
+            resp = requests.get(uri)
             if resp.status_code != 200:
                 print("%s gave %i" % (uri, resp.status_code), file=sys.stderr)
                 return None

scripts-dev/release.py

@@ -32,7 +32,7 @@ import time
 import urllib.request
 from os import path
 from tempfile import TemporaryDirectory
-from typing import Any
+from typing import Any, Match
 
 import attr
 import click
@@ -291,12 +291,6 @@ def _prepare() -> None:
     synapse_repo.git.add("-u")
     subprocess.run("git diff --cached", shell=True)
 
-    print(
-        "Consider any upcoming platform deprecations that should be mentioned in the changelog. (e.g. upcoming Python, PostgreSQL or SQLite deprecations)"
-    )
-    print(
-        "Platform deprecations should be mentioned at least 1 release prior to being unsupported."
-    )
     if click.confirm("Edit changelog?", default=False):
         click.edit(filename="CHANGES.md")
 
@@ -968,6 +962,10 @@ def generate_and_write_changelog(
     new_changes = new_changes.replace(
         "No significant changes.", f"No significant changes since {current_version}."
     )
+    new_changes += build_dependabot_changelog(
+        repo,
+        current_version,
+    )
 
     # Prepend changes to changelog
     with open("CHANGES.md", "r+") as f:
@@ -982,5 +980,49 @@ def generate_and_write_changelog(
         os.remove(filename)
 
 
+def build_dependabot_changelog(repo: Repo, current_version: version.Version) -> str:
+    """Summarise dependabot commits between `current_version` and `release_branch`.
+
+    Returns an empty string if there have been no such commits; otherwise outputs a
+    third-level markdown header followed by an unordered list."""
+    last_release_commit = repo.tag("v" + str(current_version)).commit
+    rev_spec = f"{last_release_commit.hexsha}.."
+    commits = list(git.objects.Commit.iter_items(repo, rev_spec))
+    messages = []
+    for commit in reversed(commits):
+        if commit.author.name == "dependabot[bot]":
+            message: str | bytes = commit.message
+            if isinstance(message, bytes):
+                message = message.decode("utf-8")
+            messages.append(message.split("\n", maxsplit=1)[0])
+
+    if not messages:
+        print(f"No dependabot commits in range {rev_spec}", file=sys.stderr)
+        return ""
+
+    messages.sort()
+
+    def replacer(match: Match[str]) -> str:
+        desc = match.group(1)
+        number = match.group(2)
+        return f"* {desc}. ([\\#{number}](https://github.com/element-hq/synapse/issues/{number}))"
+
+    for i, message in enumerate(messages):
+        messages[i] = re.sub(r"(.*) \(#(\d+)\)$", replacer, message)
+    messages.insert(0, "### Updates to locked dependencies\n")
+    # Add an extra blank line to the bottom of the section
+    messages.append("")
+    return "\n".join(messages)
+
+
+@cli.command()
+@click.argument("since")
+def test_dependabot_changelog(since: str) -> None:
+    """Test building the dependabot changelog.
+
+    Summarises all dependabot commits between the SINCE tag and the current git HEAD."""
+    print(build_dependabot_changelog(git.Repo("."), version.Version(since)))
+
+
 if __name__ == "__main__":
     cli()

synapse/api/constants.py

@@ -29,19 +29,6 @@ from typing import Final
 # the max size of a (canonical-json-encoded) event
 MAX_PDU_SIZE = 65536
 
-# The maximum allowed size of an HTTP request.
-# Other than media uploads, the biggest request we expect to see is a fully-loaded
-# /federation/v1/send request.
-#
-# The main thing in such a request is up to 50 PDUs, and up to 100 EDUs. PDUs are
-# limited to 65536 bytes (possibly slightly more if the sender didn't use canonical
-# json encoding); there is no specced limit to EDUs (see
-# https://github.com/matrix-org/matrix-doc/issues/3121).
-#
-# in short, we somewhat arbitrarily limit requests to 200 * 64K (about 12.5M)
-#
-MAX_REQUEST_SIZE = 200 * MAX_PDU_SIZE
-
 # Max/min size of ints in canonical JSON
 CANONICALJSON_MAX_INT = (2**53) - 1
 CANONICALJSON_MIN_INT = -CANONICALJSON_MAX_INT
@@ -320,10 +307,6 @@ class AccountDataTypes:
     MSC4155_INVITE_PERMISSION_CONFIG: Final = (
         "org.matrix.msc4155.invite_permission_config"
     )
-    # MSC4380: Invite blocking
-    MSC4380_INVITE_PERMISSION_CONFIG: Final = (
-        "org.matrix.msc4380.invite_permission_config"
-    )
     # Synapse-specific behaviour. See "Client-Server API Extensions" documentation
     # in Admin API for more information.
     SYNAPSE_ADMIN_CLIENT_CONFIG: Final = "io.element.synapse.admin_client_config"

synapse/api/errors.py

@@ -137,7 +137,7 @@ class Codes(str, Enum):
     PROFILE_TOO_LARGE = "M_PROFILE_TOO_LARGE"
     KEY_TOO_LARGE = "M_KEY_TOO_LARGE"
 
-    # Part of MSC4155/MSC4380
+    # Part of MSC4155
     INVITE_BLOCKED = "ORG.MATRIX.MSC4155.M_INVITE_BLOCKED"
 
     # Part of MSC4190
@@ -856,12 +856,6 @@ class HttpResponseException(CodeMessageException):
         return ProxiedRequestError(self.code, errmsg, errcode, j)
 
 
-class HomeServerNotSetupException(Exception):
-    """
-    Raised when an operation is attempted on the HomeServer before setup() has been called.
-    """
-
-
 class ShadowBanError(Exception):
     """
     Raised when a shadow-banned user attempts to perform an action.

synapse/api/ratelimiting.py

@@ -27,7 +27,6 @@ from synapse.config.ratelimiting import RatelimitSettings
 from synapse.storage.databases.main import DataStore
 from synapse.types import Requester
 from synapse.util.clock import Clock
-from synapse.util.duration import Duration
 from synapse.util.wheel_timer import WheelTimer
 
 if TYPE_CHECKING:
@@ -101,7 +100,7 @@ class Ratelimiter:
         # and doesn't affect correctness.
         self._timer: WheelTimer[Hashable] = WheelTimer()
 
-        self.clock.looping_call(self._prune_message_counts, Duration(seconds=15))
+        self.clock.looping_call(self._prune_message_counts, 15 * 1000)
 
     def _get_key(self, requester: Requester | None, key: Hashable | None) -> Hashable:
         """Use the requester's MXID as a fallback key if no key is provided."""

synapse/app/_base.py

@@ -36,13 +36,12 @@ from typing import (
     Awaitable,
     Callable,
     NoReturn,
-    Optional,
     cast,
 )
 from wsgiref.simple_server import WSGIServer
 
 from cryptography.utils import CryptographyDeprecationWarning
-from typing_extensions import ParamSpec, assert_never
+from typing_extensions import ParamSpec
 
 import twisted
 from twisted.internet import defer, error, reactor as _reactor
@@ -60,17 +59,12 @@ from twisted.python.threadpool import ThreadPool
 from twisted.web.resource import Resource
 
 import synapse.util.caches
-from synapse.api.constants import MAX_REQUEST_SIZE
+from synapse.api.constants import MAX_PDU_SIZE
 from synapse.app import check_bind_error
 from synapse.config import ConfigError
 from synapse.config._base import format_config_error
 from synapse.config.homeserver import HomeServerConfig
-from synapse.config.server import (
+from synapse.config.server import ListenerConfig, ManholeConfig, TCPListenerConfig
-    ListenerConfig,
-    ManholeConfig,
-    TCPListenerConfig,
-    UnixListenerConfig,
-)
 from synapse.crypto import context_factory
 from synapse.events.auto_accept_invites import InviteAutoAccepter
 from synapse.events.presence_router import load_legacy_presence_router
@@ -419,44 +413,13 @@ def listen_unix(
     ]
 
 
-class ListenerException(RuntimeError):
-    """
-    An exception raised when we fail to listen with the given `ListenerConfig`.
-
-    Attributes:
-        listener_config: The listener config that caused the exception.
-    """
-
-    def __init__(
-        self,
-        listener_config: ListenerConfig,
-    ):
-        listener_human_name = ""
-        port = ""
-        if isinstance(listener_config, TCPListenerConfig):
-            listener_human_name = "TCP port"
-            port = str(listener_config.port)
-        elif isinstance(listener_config, UnixListenerConfig):
-            listener_human_name = "unix socket"
-            port = listener_config.path
-        else:
-            assert_never(listener_config)
-
-        super().__init__(
-            "Failed to listen on %s (%s) with the given listener config: %s"
-            % (listener_human_name, port, listener_config)
-        )
-
-        self.listener_config = listener_config
-
-
 def listen_http(
     hs: "HomeServer",
     listener_config: ListenerConfig,
     root_resource: Resource,
     version_string: str,
     max_request_body_size: int,
-    context_factory: Optional[IOpenSSLContextFactory],
+    context_factory: IOpenSSLContextFactory | None,
     reactor: ISynapseReactor = reactor,
 ) -> list[Port]:
     """
@@ -484,7 +447,6 @@ def listen_http(
         hs=hs,
     )
 
-    try:
     if isinstance(listener_config, TCPListenerConfig):
         if listener_config.is_tls():
             # refresh_certificate should have been called before this.
@@ -506,11 +468,9 @@ def listen_http(
                 site,
                 reactor=reactor,
             )
-                logger.info(
+            logger.info("Synapse now listening on TCP port %d", listener_config.port)
-                    "Synapse now listening on TCP port %d", listener_config.port
-                )
 
-        elif isinstance(listener_config, UnixListenerConfig):
+    else:
         ports = listen_unix(
             listener_config.path, listener_config.mode, site, reactor=reactor
         )
@@ -520,19 +480,6 @@ def listen_http(
             "Synapse now listening on Unix Socket at: %s",
             ports[0].getHost().name.decode("utf-8"),
         )
-        else:
-            assert_never(listener_config)
-    except Exception as exc:
-        # The Twisted interface says that "Users should not call this function
-        # themselves!" but this appears to be the correct/only way handle proper cleanup
-        # of the site when things go wrong. In the normal case, a `Port` is created
-        # which we can call `Port.stopListening()` on to do the same thing (but no
-        # `Port` is created when an error occurs).
-        #
-        # We use `site.stopFactory()` instead of `site.doStop()` as the latter assumes
-        # that `site.doStart()` was called (which won't be the case if an error occurs).
-        site.stopFactory()
-        raise ListenerException(listener_config) from exc
 
     return ports
 
@@ -896,8 +843,17 @@ def sdnotify(state: bytes) -> None:
 def max_request_body_size(config: HomeServerConfig) -> int:
     """Get a suitable maximum size for incoming HTTP requests"""
 
-    # Baseline default for any request that isn't configured in the homeserver config
+    # Other than media uploads, the biggest request we expect to see is a fully-loaded
-    max_request_size = MAX_REQUEST_SIZE
+    # /federation/v1/send request.
+    #
+    # The main thing in such a request is up to 50 PDUs, and up to 100 EDUs. PDUs are
+    # limited to 65536 bytes (possibly slightly more if the sender didn't use canonical
+    # json encoding); there is no specced limit to EDUs (see
+    # https://github.com/matrix-org/matrix-doc/issues/3121).
+    #
+    # in short, we somewhat arbitrarily limit requests to 200 * 64K (about 12.5M)
+    #
+    max_request_size = 200 * MAX_PDU_SIZE
 
     # if we have a media repo enabled, we may need to allow larger uploads than that
     if config.media.can_load_media_repo:

synapse/app/admin_cmd.py

@@ -24,7 +24,7 @@ import logging
 import os
 import sys
 import tempfile
-from typing import Mapping, Optional, Sequence
+from typing import Mapping, Sequence
 
 from twisted.internet import defer, task
 
@@ -291,7 +291,7 @@ def load_config(argv_options: list[str]) -> tuple[HomeServerConfig, argparse.Nam
 
 def create_homeserver(
     config: HomeServerConfig,
-    reactor: Optional[ISynapseReactor] = None,
+    reactor: ISynapseReactor | None = None,
 ) -> AdminCmdServer:
     """
     Create a homeserver instance for the Synapse admin command process.

synapse/app/generic_worker.py

@@ -21,7 +21,6 @@
 #
 import logging
 import sys
-from typing import Optional
 
 from twisted.web.resource import Resource
 
@@ -336,7 +335,7 @@ def load_config(argv_options: list[str]) -> HomeServerConfig:
 
 def create_homeserver(
     config: HomeServerConfig,
-    reactor: Optional[ISynapseReactor] = None,
+    reactor: ISynapseReactor | None = None,
 ) -> GenericWorkerServer:
     """
     Create a homeserver instance for the Synapse worker process.

synapse/app/homeserver.py

@@ -22,7 +22,7 @@
 import logging
 import os
 import sys
-from typing import Iterable, Optional
+from typing import Iterable
 
 from twisted.internet.tcp import Port
 from twisted.web.resource import EncodingResourceWrapper, Resource
@@ -350,7 +350,7 @@ def load_or_generate_config(argv_options: list[str]) -> HomeServerConfig:
 
 def create_homeserver(
     config: HomeServerConfig,
-    reactor: Optional[ISynapseReactor] = None,
+    reactor: ISynapseReactor | None = None,
 ) -> SynapseHomeServer:
     """
     Create a homeserver instance for the Synapse main process.

synapse/app/phone_stats_home.py

@@ -30,20 +30,24 @@ from twisted.internet import defer
 
 from synapse.metrics import SERVER_NAME_LABEL
 from synapse.types import JsonDict
-from synapse.util.duration import Duration
+from synapse.util.constants import (
+    MILLISECONDS_PER_SECOND,
+    ONE_HOUR_SECONDS,
+    ONE_MINUTE_SECONDS,
+)
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
 
 logger = logging.getLogger("synapse.app.homeserver")
 
-INITIAL_DELAY_BEFORE_FIRST_PHONE_HOME = Duration(minutes=5)
+INITIAL_DELAY_BEFORE_FIRST_PHONE_HOME_SECONDS = 5 * ONE_MINUTE_SECONDS
 """
 We wait 5 minutes to send the first set of stats as the server can be quite busy the
 first few minutes
 """
 
-PHONE_HOME_INTERVAL = Duration(hours=3)
+PHONE_HOME_INTERVAL_SECONDS = 3 * ONE_HOUR_SECONDS
 """
 Phone home stats are sent every 3 hours
 """
@@ -218,13 +222,13 @@ def start_phone_stats_home(hs: "HomeServer") -> None:
     # table will decrease
     clock.looping_call(
         hs.get_datastores().main.generate_user_daily_visits,
-        Duration(minutes=5),
+        5 * ONE_MINUTE_SECONDS * MILLISECONDS_PER_SECOND,
     )
 
     # monthly active user limiting functionality
     clock.looping_call(
         hs.get_datastores().main.reap_monthly_active_users,
-        Duration(hours=1),
+        ONE_HOUR_SECONDS * MILLISECONDS_PER_SECOND,
     )
     hs.get_datastores().main.reap_monthly_active_users()
 
@@ -263,14 +267,14 @@ def start_phone_stats_home(hs: "HomeServer") -> None:
 
     if hs.config.server.limit_usage_by_mau or hs.config.server.mau_stats_only:
         generate_monthly_active_users()
-        clock.looping_call(generate_monthly_active_users, Duration(minutes=5))
+        clock.looping_call(generate_monthly_active_users, 5 * 60 * 1000)
     # End of monthly active user settings
 
     if hs.config.metrics.report_stats:
         logger.info("Scheduling stats reporting for 3 hour intervals")
         clock.looping_call(
             phone_stats_home,
-            PHONE_HOME_INTERVAL,
+            PHONE_HOME_INTERVAL_SECONDS * MILLISECONDS_PER_SECOND,
             hs,
             stats,
         )
@@ -278,14 +282,14 @@ def start_phone_stats_home(hs: "HomeServer") -> None:
         # We need to defer this init for the cases that we daemonize
         # otherwise the process ID we get is that of the non-daemon process
         clock.call_later(
-            Duration(seconds=0),
+            0,
             performance_stats_init,
         )
 
         # We wait 5 minutes to send the first set of stats as the server can
         # be quite busy the first few minutes
         clock.call_later(
-            INITIAL_DELAY_BEFORE_FIRST_PHONE_HOME,
+            INITIAL_DELAY_BEFORE_FIRST_PHONE_HOME_SECONDS,
             phone_stats_home,
             hs,
             stats,

synapse/appservice/scheduler.py

@@ -77,7 +77,6 @@ from synapse.logging.context import run_in_background
 from synapse.storage.databases.main import DataStore
 from synapse.types import DeviceListUpdates, JsonMapping
 from synapse.util.clock import Clock, DelayedCallWrapper
-from synapse.util.duration import Duration
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
@@ -505,8 +504,8 @@ class _Recoverer:
         self.scheduled_recovery: DelayedCallWrapper | None = None
 
     def recover(self) -> None:
-        delay = Duration(seconds=2**self.backoff_counter)
+        delay = 2**self.backoff_counter
-        logger.info("Scheduling retries on %s in %fs", self.service.id, delay.as_secs())
+        logger.info("Scheduling retries on %s in %fs", self.service.id, delay)
         self.scheduled_recovery = self.clock.call_later(
             delay,
             self.hs.run_as_background_process,

synapse/config/_base.py

@@ -672,8 +672,7 @@ class RootConfig:
             action="append",
             metavar="CONFIG_FILE",
             help="Specify config file. Can be given multiple times and"
-            " may specify directories containing *.yaml files."
+            " may specify directories containing *.yaml files.",
-            " Top-level keys in later files overwrite ones in earlier files.",
         )
         parser.add_argument(
             "--no-secrets-in-config",

synapse/config/experimental.py

@@ -3,7 +3,6 @@
 #
 # Copyright 2021 The Matrix.org Foundation C.I.C.
 # Copyright (C) 2023 New Vector, Ltd
-# Copyright (C) 2025 Element Creations Ltd
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
@@ -439,9 +438,6 @@ class ExperimentalConfig(Config):
         # previously calculated push actions.
         self.msc2654_enabled: bool = experimental.get("msc2654_enabled", False)
 
-        # MSC2666: Query mutual rooms between two users.
-        self.msc2666_enabled: bool = experimental.get("msc2666_enabled", False)
-
         # MSC2815 (allow room moderators to view redacted event content)
         self.msc2815_enabled: bool = experimental.get("msc2815_enabled", False)
 
@@ -534,9 +530,6 @@ class ExperimentalConfig(Config):
             "msc4108_delegation_endpoint", None
         )
 
-        # MSC4370: Get extremities federation endpoint
-        self.msc4370_enabled = experimental.get("msc4370_enabled", False)
-
         auth_delegated = self.msc3861.enabled or (
             config.get("matrix_authentication_service") or {}
         ).get("enabled", False)
@@ -600,6 +593,3 @@ class ExperimentalConfig(Config):
         # MSC4306: Thread Subscriptions
         # (and MSC4308: Thread Subscriptions extension to Sliding Sync)
         self.msc4306_enabled: bool = experimental.get("msc4306_enabled", False)
-
-        # MSC4380: Invite blocking
-        self.msc4380_enabled: bool = experimental.get("msc4380_enabled", False)

synapse/crypto/keyring.py

@@ -21,7 +21,6 @@
 
 import abc
 import logging
-from contextlib import ExitStack
 from typing import TYPE_CHECKING, Callable, Iterable
 
 import attr
@@ -151,40 +150,23 @@ class Keyring:
     """
 
     def __init__(
-        self,
+        self, hs: "HomeServer", key_fetchers: "Iterable[KeyFetcher] | None" = None
-        hs: "HomeServer",
-        test_only_key_fetchers: "list[KeyFetcher] | None" = None,
     ):
-        """
-        Args:
-            hs: The HomeServer instance
-            test_only_key_fetchers: Dependency injection for tests only. If provided,
-                these key fetchers will be used instead of the default ones.
-        """
-        # Clean-up to avoid partial initialization leaving behind references.
-        with ExitStack() as exit:
         self.server_name = hs.hostname
 
-            self._key_fetchers: list[KeyFetcher] = []
+        if key_fetchers is None:
-            if test_only_key_fetchers is None:
             # Always fetch keys from the database.
-                store_key_fetcher = StoreKeyFetcher(hs)
+            mutable_key_fetchers: list[KeyFetcher] = [StoreKeyFetcher(hs)]
-                exit.callback(store_key_fetcher.shutdown)
-                self._key_fetchers.append(store_key_fetcher)
-
             # Fetch keys from configured trusted key servers, if any exist.
             key_servers = hs.config.key.key_servers
             if key_servers:
-                    perspectives_key_fetcher = PerspectivesKeyFetcher(hs)
+                mutable_key_fetchers.append(PerspectivesKeyFetcher(hs))
-                    exit.callback(perspectives_key_fetcher.shutdown)
-                    self._key_fetchers.append(perspectives_key_fetcher)
-
             # Finally, fetch keys from the origin server directly.
-                server_key_fetcher = ServerKeyFetcher(hs)
+            mutable_key_fetchers.append(ServerKeyFetcher(hs))
-                exit.callback(server_key_fetcher.shutdown)
+
-                self._key_fetchers.append(server_key_fetcher)
+            self._key_fetchers: Iterable[KeyFetcher] = tuple(mutable_key_fetchers)
         else:
-                self._key_fetchers = test_only_key_fetchers
+            self._key_fetchers = key_fetchers
 
         self._fetch_keys_queue: BatchingQueue[
             _FetchKeyRequest, dict[str, dict[str, FetchKeyResult]]
@@ -195,7 +177,6 @@ class Keyring:
             # The method called to fetch each key
             process_batch_callback=self._inner_fetch_key_requests,
         )
-            exit.callback(self._fetch_keys_queue.shutdown)
 
         self._is_mine_server_name = hs.is_mine_server_name
 
@@ -213,19 +194,13 @@ class Keyring:
             valid_until_ts=2**63,  # fake future timestamp
         )
 
-            # We reached the end of the block which means everything was successful, so
-            # no exit handlers are needed (remove them all).
-            exit.pop_all()
-
     def shutdown(self) -> None:
         """
         Prepares the KeyRing for garbage collection by shutting down it's queues.
         """
         self._fetch_keys_queue.shutdown()
-
         for key_fetcher in self._key_fetchers:
             key_fetcher.shutdown()
-        self._key_fetchers.clear()
 
     async def verify_json_for_server(
         self,
@@ -546,22 +521,10 @@ class StoreKeyFetcher(KeyFetcher):
     """KeyFetcher impl which fetches keys from our data store"""
 
     def __init__(self, hs: "HomeServer"):
-        # Clean-up to avoid partial initialization leaving behind references.
-        with ExitStack() as exit:
         super().__init__(hs)
-            # `KeyFetcher` keeps a reference to `hs` which we need to clean up if
-            # something goes wrong so we can cleanly shutdown the homeserver.
-            exit.callback(super().shutdown)
 
-            # An error can be raised here if someone tried to create a `StoreKeyFetcher`
-            # before the homeserver is fully set up (`HomeServerNotSetupException:
-            # HomeServer.setup must be called before getting datastores`).
         self.store = hs.get_datastores().main
 
-            # We reached the end of the block which means everything was successful, so
-            # no exit handlers are needed (remove them all).
-            exit.pop_all()
-
     async def _fetch_keys(
         self, keys_to_fetch: list[_FetchKeyRequest]
     ) -> dict[str, dict[str, FetchKeyResult]]:
@@ -580,22 +543,10 @@ class StoreKeyFetcher(KeyFetcher):
 
 class BaseV2KeyFetcher(KeyFetcher):
     def __init__(self, hs: "HomeServer"):
-        # Clean-up to avoid partial initialization leaving behind references.
-        with ExitStack() as exit:
         super().__init__(hs)
-            # `KeyFetcher` keeps a reference to `hs` which we need to clean up if
-            # something goes wrong so we can cleanly shutdown the homeserver.
-            exit.callback(super().shutdown)
 
-            # An error can be raised here if someone tried to create a `StoreKeyFetcher`
-            # before the homeserver is fully set up (`HomeServerNotSetupException:
-            # HomeServer.setup must be called before getting datastores`).
         self.store = hs.get_datastores().main
 
-            # We reached the end of the block which means everything was successful, so
-            # no exit handlers are needed (remove them all).
-            exit.pop_all()
-
     async def process_v2_response(
         self, from_server: str, response_json: JsonDict, time_added_ms: int
     ) -> dict[str, FetchKeyResult]:

synapse/events/__init__.py

@@ -548,7 +548,7 @@ class FrozenEventV4(FrozenEventV3):
         assert create_event_id not in self._dict["auth_events"]
         if self.type == EventTypes.Create and self.get_state_key() == "":
             return self._dict["auth_events"]  # should be []
-        return [*self._dict["auth_events"], create_event_id]
+        return self._dict["auth_events"] + [create_event_id]
 
 
 def _event_type_from_format_version(

synapse/federation/federation_client.py

@@ -75,7 +75,6 @@ from synapse.types import JsonDict, StrCollection, UserID, get_domain_from_id
 from synapse.types.handlers.policy_server import RECOMMENDATION_OK, RECOMMENDATION_SPAM
 from synapse.util.async_helpers import concurrently_execute
 from synapse.util.caches.expiringcache import ExpiringCache
-from synapse.util.duration import Duration
 from synapse.util.retryutils import NotRetryingDestination
 
 if TYPE_CHECKING:
@@ -133,7 +132,7 @@ class FederationClient(FederationBase):
         super().__init__(hs)
 
         self.pdu_destination_tried: dict[str, dict[str, int]] = {}
-        self._clock.looping_call(self._clear_tried_cache, Duration(minutes=1))
+        self._clock.looping_call(self._clear_tried_cache, 60 * 1000)
         self.state = hs.get_state_handler()
         self.transport_layer = hs.get_federation_transport_client()
 

synapse/federation/federation_server.py

@@ -4,7 +4,6 @@
 # Copyright 2019-2021 Matrix.org Federation C.I.C
 # Copyright 2015, 2016 OpenMarket Ltd
 # Copyright (C) 2023 New Vector, Ltd
-# Copyright (C) 2025 Element Creations Ltd
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
@@ -90,7 +89,6 @@ from synapse.types import JsonDict, StateMap, UserID, get_domain_from_id
 from synapse.util import unwrapFirstError
 from synapse.util.async_helpers import Linearizer, concurrently_execute, gather_results
 from synapse.util.caches.response_cache import ResponseCache
-from synapse.util.duration import Duration
 from synapse.util.stringutils import parse_server_name
 
 if TYPE_CHECKING:
@@ -228,7 +226,7 @@ class FederationServer(FederationBase):
                 )
 
             # We pause a bit so that we don't start handling all rooms at once.
-            await self._clock.sleep(Duration(seconds=random.uniform(0, 0.1)))
+            await self._clock.sleep(random.uniform(0, 0.1))
 
     async def on_backfill_request(
         self, origin: str, room_id: str, versions: list[str], limit: int
@@ -303,9 +301,7 @@ class FederationServer(FederationBase):
             # Start a periodic check for old staged events. This is to handle
             # the case where locks time out, e.g. if another process gets killed
             # without dropping its locks.
-            self._clock.looping_call(
+            self._clock.looping_call(self._handle_old_staged_events, 60 * 1000)
-                self._handle_old_staged_events, Duration(minutes=1)
-            )
 
         # keep this as early as possible to make the calculated origin ts as
         # accurate as possible.
@@ -684,16 +680,6 @@ class FederationServer(FederationBase):
         resp = await self.registry.on_query(query_type, args)
         return 200, resp
 
-    async def on_get_extremities_request(self, origin: str, room_id: str) -> JsonDict:
-        origin_host, _ = parse_server_name(origin)
-        await self.check_server_matches_acl(origin_host, room_id)
-
-        await self._event_auth_handler.assert_host_in_room(room_id, origin)
-
-        extremities = await self.store.get_forward_extremities_for_room(room_id)
-        prev_event_ids = [e[0] for e in extremities]
-        return {"prev_events": prev_event_ids}
-
     async def on_make_join_request(
         self, origin: str, room_id: str, user_id: str, supported_versions: list[str]
     ) -> dict[str, Any]:

synapse/federation/send_queue.py

@@ -53,7 +53,6 @@ from synapse.federation.sender import AbstractFederationSender, FederationSender
 from synapse.metrics import SERVER_NAME_LABEL, LaterGauge
 from synapse.replication.tcp.streams.federation import FederationStream
 from synapse.types import JsonDict, ReadReceipt, RoomStreamToken, StrCollection
-from synapse.util.duration import Duration
 from synapse.util.metrics import Measure
 
 from .units import Edu
@@ -138,7 +137,7 @@ class FederationRemoteSendQueue(AbstractFederationSender):
             assert isinstance(queue, Sized)
             register(queue_name, queue=queue)
 
-        self.clock.looping_call(self._clear_queue, Duration(seconds=30))
+        self.clock.looping_call(self._clear_queue, 30 * 1000)
 
     def shutdown(self) -> None:
         """Stops this federation sender instance from sending further transactions."""

synapse/federation/sender/__init__.py

@@ -174,7 +174,6 @@ from synapse.types import (
     get_domain_from_id,
 )
 from synapse.util.clock import Clock
-from synapse.util.duration import Duration
 from synapse.util.metrics import Measure
 from synapse.util.retryutils import filter_destinations_by_retry_limiter
 
@@ -219,12 +218,12 @@ transaction_queue_pending_edus_gauge = LaterGauge(
 # Please note that rate limiting still applies, so while the loop is
 # executed every X seconds the destinations may not be woken up because
 # they are being rate limited following previous attempt failures.
-WAKEUP_RETRY_PERIOD = Duration(minutes=1)
+WAKEUP_RETRY_PERIOD_SEC = 60
 
-# Time to wait in between waking up each destination, i.e. one destination
+# Time (in s) to wait in between waking up each destination, i.e. one destination
 # will be woken up every <x> seconds until we have woken every destination
 # has outstanding catch-up.
-WAKEUP_INTERVAL_BETWEEN_DESTINATIONS = Duration(seconds=5)
+WAKEUP_INTERVAL_BETWEEN_DESTINATIONS_SEC = 5
 
 
 class AbstractFederationSender(metaclass=abc.ABCMeta):
@@ -380,7 +379,7 @@ class _DestinationWakeupQueue:
 
                 queue.attempt_new_transaction()
 
-                await self.clock.sleep(Duration(seconds=current_sleep_seconds))
+                await self.clock.sleep(current_sleep_seconds)
 
                 if not self.queue:
                     break
@@ -469,7 +468,7 @@ class FederationSender(AbstractFederationSender):
         # Regularly wake up destinations that have outstanding PDUs to be caught up
         self.clock.looping_call_now(
             self.hs.run_as_background_process,
-            WAKEUP_RETRY_PERIOD,
+            WAKEUP_RETRY_PERIOD_SEC * 1000.0,
             "wake_destinations_needing_catchup",
             self._wake_destinations_needing_catchup,
         )
@@ -1162,4 +1161,4 @@ class FederationSender(AbstractFederationSender):
                     last_processed,
                 )
                 self.wake_destination(destination)
-                await self.clock.sleep(WAKEUP_INTERVAL_BETWEEN_DESTINATIONS)
+                await self.clock.sleep(WAKEUP_INTERVAL_BETWEEN_DESTINATIONS_SEC)

synapse/federation/transport/server/__init__.py

@@ -4,7 +4,6 @@
 # Copyright 2020 Sorunome
 # Copyright 2014-2021 The Matrix.org Foundation C.I.C.
 # Copyright (C) 2023 New Vector, Ltd
-# Copyright (C) 2025 Element Creations Ltd
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
@@ -34,7 +33,6 @@ from synapse.federation.transport.server.federation import (
     FederationMediaDownloadServlet,
     FederationMediaThumbnailServlet,
     FederationUnstableClientKeysClaimServlet,
-    FederationUnstableGetExtremitiesServlet,
 )
 from synapse.http.server import HttpServer, JsonResource
 from synapse.http.servlet import (
@@ -328,12 +326,6 @@ def register_servlets(
                 if not hs.config.media.can_load_media_repo:
                     continue
 
-            if (
-                servletclass == FederationUnstableGetExtremitiesServlet
-                and not hs.config.experimental.msc4370_enabled
-            ):
-                continue
-
             servletclass(
                 hs=hs,
                 authenticator=authenticator,

synapse/federation/transport/server/federation.py

@@ -3,7 +3,6 @@
 #
 #  Copyright 2021 The Matrix.org Foundation C.I.C.
 # Copyright (C) 2023 New Vector, Ltd
-# Copyright (C) 2025 Element Creations Ltd
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU Affero General Public License as
@@ -274,22 +273,6 @@ class FederationQueryServlet(BaseFederationServerServlet):
         return await self.handler.on_query_request(query_type, args)
 
 
-class FederationUnstableGetExtremitiesServlet(BaseFederationServerServlet):
-    PREFIX = FEDERATION_UNSTABLE_PREFIX + "/org.matrix.msc4370"
-    PATH = "/extremities/(?P<room_id>[^/]*)"
-    CATEGORY = "Federation requests"
-
-    async def on_GET(
-        self,
-        origin: str,
-        content: Literal[None],
-        query: dict[bytes, list[bytes]],
-        room_id: str,
-    ) -> tuple[int, JsonDict]:
-        result = await self.handler.on_get_extremities_request(origin, room_id)
-        return 200, result
-
-
 class FederationMakeJoinServlet(BaseFederationServerServlet):
     PATH = "/make_join/(?P<room_id>[^/]*)/(?P<user_id>[^/]*)"
     CATEGORY = "Federation requests"
@@ -901,7 +884,6 @@ FEDERATION_SERVLET_CLASSES: tuple[type[BaseFederationServlet], ...] = (
     FederationBackfillServlet,
     FederationTimestampLookupServlet,
     FederationQueryServlet,
-    FederationUnstableGetExtremitiesServlet,
     FederationMakeJoinServlet,
     FederationMakeLeaveServlet,
     FederationEventServlet,

synapse/handlers/account_validity.py

@@ -28,7 +28,6 @@ from synapse.metrics.background_process_metrics import wrap_as_background_proces
 from synapse.types import UserID
 from synapse.util import stringutils
 from synapse.util.async_helpers import delay_cancellation
-from synapse.util.duration import Duration
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
@@ -74,7 +73,7 @@ class AccountValidityHandler:
 
             # Check the renewal emails to send and send them every 30min.
             if hs.config.worker.run_background_tasks:
-                self.clock.looping_call(self._send_renewal_emails, Duration(minutes=30))
+                self.clock.looping_call(self._send_renewal_emails, 30 * 60 * 1000)
 
     async def is_user_expired(self, user_id: str) -> bool:
         """Checks if a user has expired against third-party modules.

synapse/handlers/auth.py

@@ -74,7 +74,6 @@ from synapse.storage.databases.main.registration import (
 from synapse.types import JsonDict, Requester, StrCollection, UserID
 from synapse.util import stringutils as stringutils
 from synapse.util.async_helpers import delay_cancellation, maybe_awaitable
-from synapse.util.duration import Duration
 from synapse.util.msisdn import phone_number_to_msisdn
 from synapse.util.stringutils import base62_encode
 from synapse.util.threepids import canonicalise_email
@@ -243,7 +242,7 @@ class AuthHandler:
         if hs.config.worker.run_background_tasks:
             self._clock.looping_call(
                 run_as_background_process,
-                Duration(minutes=5),
+                5 * 60 * 1000,
                 "expire_old_sessions",
                 self.server_name,
                 self._expire_old_sessions,

synapse/handlers/delayed_events.py

@@ -13,7 +13,7 @@
 #
 
 import logging
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING
 
 from twisted.internet.interfaces import IDelayedCall
 
@@ -42,7 +42,6 @@ from synapse.types import (
     UserID,
     create_requester,
 )
-from synapse.util.duration import Duration
 from synapse.util.events import generate_fake_event_id
 from synapse.util.metrics import Measure
 from synapse.util.sentinel import Sentinel
@@ -74,7 +73,7 @@ class DelayedEventsHandler:
             cfg=self._config.ratelimiting.rc_delayed_event_mgmt,
         )
 
-        self._next_delayed_event_call: Optional[IDelayedCall] = None
+        self._next_delayed_event_call: IDelayedCall | None = None
 
         # The current position in the current_state_delta stream
         self._event_pos: int | None = None
@@ -93,22 +92,20 @@ class DelayedEventsHandler:
                 # Kick off again (without blocking) to catch any missed notifications
                 # that may have fired before the callback was added.
                 self._clock.call_later(
-                    Duration(seconds=0),
+                    0,
                     self.notify_new_event,
                 )
 
-                # Now process any delayed events that are due to be sent.
+                # Delayed events that are already marked as processed on startup might not have been
-                #
+                # sent properly on the last run of the server, so unmark them to send them again.
-                # We set `reprocess_events` to True in case any events had been
-                # marked as processed, but had not yet actually been sent,
-                # before the homeserver stopped.
-                #
                 # Caveat: this will double-send delayed events that successfully persisted, but failed
                 # to be removed from the DB table of delayed events.
                 # TODO: To avoid double-sending, scan the timeline to find which of these events were
                 # already sent. To do so, must store delay_ids in sent events to retrieve them later.
+                await self._store.unprocess_delayed_events()
+
                 events, next_send_ts = await self._store.process_timeout_delayed_events(
-                    self._get_current_ts(), reprocess_events=True
+                    self._get_current_ts()
                 )
 
                 if next_send_ts:
@@ -426,21 +423,16 @@ class DelayedEventsHandler:
         Raises:
             NotFoundError: if no matching delayed event could be found.
         """
+        assert self._is_master
         await self._delayed_event_mgmt_ratelimiter.ratelimit(
             None, request.getClientAddress().host
         )
-
+        await make_deferred_yieldable(self._initialized_from_db)
-        # Note: We don't need to wait on `self._initialized_from_db` here as the
-        # events that deals with are already marked as processed.
-        #
-        # `restart_delayed_events` will skip over such events entirely.
 
         next_send_ts = await self._store.restart_delayed_event(
             delay_id, self._get_current_ts()
         )
 
-        # Only the main process handles sending delayed events.
-        if self._is_master:
         if self._next_send_ts_changed(next_send_ts):
             self._schedule_next_at(next_send_ts)
 
@@ -509,17 +501,17 @@ class DelayedEventsHandler:
 
     def _schedule_next_at(self, next_send_ts: Timestamp) -> None:
         delay = next_send_ts - self._get_current_ts()
-        delay_duration = Duration(milliseconds=max(delay, 0))
+        delay_sec = delay / 1000 if delay > 0 else 0
 
         if self._next_delayed_event_call is None:
             self._next_delayed_event_call = self._clock.call_later(
-                delay_duration,
+                delay_sec,
                 self.hs.run_as_background_process,
                 "_send_on_timeout",
                 self._send_on_timeout,
             )
         else:
-            self._next_delayed_event_call.reset(delay_duration.as_secs())
+            self._next_delayed_event_call.reset(delay_sec)
 
     async def get_all_for_user(self, requester: Requester) -> list[JsonDict]:
         """Return all pending delayed events requested by the given user."""

synapse/handlers/device.py

@@ -71,7 +71,6 @@ from synapse.util import stringutils
 from synapse.util.async_helpers import Linearizer
 from synapse.util.caches.expiringcache import ExpiringCache
 from synapse.util.cancellation import cancellable
-from synapse.util.duration import Duration
 from synapse.util.metrics import measure_func
 from synapse.util.retryutils import (
     NotRetryingDestination,
@@ -86,7 +85,7 @@ logger = logging.getLogger(__name__)
 
 DELETE_DEVICE_MSGS_TASK_NAME = "delete_device_messages"
 MAX_DEVICE_DISPLAY_NAME_LEN = 100
-DELETE_STALE_DEVICES_INTERVAL = Duration(days=1)
+DELETE_STALE_DEVICES_INTERVAL_MS = 24 * 60 * 60 * 1000
 
 
 def _check_device_name_length(name: str | None) -> None:
@@ -187,7 +186,7 @@ class DeviceHandler:
         ):
             self.clock.looping_call(
                 self.hs.run_as_background_process,
-                DELETE_STALE_DEVICES_INTERVAL,
+                DELETE_STALE_DEVICES_INTERVAL_MS,
                 desc="delete_stale_devices",
                 func=self._delete_stale_devices,
             )
@@ -916,7 +915,7 @@ class DeviceHandler:
         )
 
     DEVICE_MSGS_DELETE_BATCH_LIMIT = 1000
-    DEVICE_MSGS_DELETE_SLEEP = Duration(milliseconds=100)
+    DEVICE_MSGS_DELETE_SLEEP_MS = 100
 
     async def _delete_device_messages(
         self,
@@ -942,7 +941,9 @@ class DeviceHandler:
             if from_stream_id is None:
                 return TaskStatus.COMPLETE, None, None
 
-            await self.clock.sleep(DeviceWriterHandler.DEVICE_MSGS_DELETE_SLEEP)
+            await self.clock.sleep(
+                DeviceWriterHandler.DEVICE_MSGS_DELETE_SLEEP_MS / 1000.0
+            )
 
 
 class DeviceWriterHandler(DeviceHandler):
@@ -1468,7 +1469,7 @@ class DeviceListUpdater(DeviceListWorkerUpdater):
         self._resync_retry_lock = Lock()
         self.clock.looping_call(
             self.hs.run_as_background_process,
-            Duration(seconds=30),
+            30 * 1000,
             func=self._maybe_retry_device_resync,
             desc="_maybe_retry_device_resync",
         )

synapse/handlers/e2e_keys.py

@@ -46,7 +46,6 @@ from synapse.types import (
 )
 from synapse.util.async_helpers import Linearizer, concurrently_execute
 from synapse.util.cancellation import cancellable
-from synapse.util.duration import Duration
 from synapse.util.json import json_decoder
 from synapse.util.retryutils import (
     NotRetryingDestination,
@@ -1635,7 +1634,7 @@ class E2eKeysHandler:
             # matrix.org has about 15M users in the e2e_one_time_keys_json table
             # (comprising 20M devices). We want this to take about a week, so we need
             # to do about one batch of 100 users every 4 seconds.
-            await self.clock.sleep(Duration(seconds=4))
+            await self.clock.sleep(4)
 
 
 def _check_cross_signing_key(

synapse/handlers/federation.py

@@ -72,7 +72,6 @@ from synapse.storage.invite_rule import InviteRule
 from synapse.types import JsonDict, StrCollection, get_domain_from_id
 from synapse.types.state import StateFilter
 from synapse.util.async_helpers import Linearizer
-from synapse.util.duration import Duration
 from synapse.util.retryutils import NotRetryingDestination
 from synapse.visibility import filter_events_for_server
 
@@ -1973,9 +1972,7 @@ class FederationHandler:
                                 logger.warning(
                                     "%s; waiting for %d ms...", e, e.retry_after_ms
                                 )
-                                await self.clock.sleep(
+                                await self.clock.sleep(e.retry_after_ms / 1000)
-                                    Duration(milliseconds=e.retry_after_ms)
-                                )
 
                         # Success, no need to try the rest of the destinations.
                         break

synapse/handlers/federation_event.py

@@ -91,7 +91,6 @@ from synapse.types import (
 )
 from synapse.types.state import StateFilter
 from synapse.util.async_helpers import Linearizer, concurrently_execute
-from synapse.util.duration import Duration
 from synapse.util.iterutils import batch_iter, partition, sorted_topologically
 from synapse.util.retryutils import NotRetryingDestination
 from synapse.util.stringutils import shortstr
@@ -1803,7 +1802,7 @@ class FederationEventHandler:
             # the reactor. For large rooms let's yield to the reactor
             # occasionally to ensure we don't block other work.
             if (i + 1) % 1000 == 0:
-                await self._clock.sleep(Duration(seconds=0))
+                await self._clock.sleep(0)
 
         # Also persist the new event in batches for similar reasons as above.
         for batch in batch_iter(events_and_contexts_to_persist, 1000):

synapse/handlers/message.py

@@ -22,7 +22,7 @@
 import logging
 import random
 from http import HTTPStatus
-from typing import TYPE_CHECKING, Any, Mapping, Optional, Sequence
+from typing import TYPE_CHECKING, Any, Mapping, Sequence
 
 from canonicaljson import encode_canonical_json
 
@@ -83,7 +83,6 @@ from synapse.types.state import StateFilter
 from synapse.util import log_failure, unwrapFirstError
 from synapse.util.async_helpers import Linearizer, gather_results
 from synapse.util.caches.expiringcache import ExpiringCache
-from synapse.util.duration import Duration
 from synapse.util.json import json_decoder, json_encoder
 from synapse.util.metrics import measure_func
 from synapse.visibility import get_effective_room_visibility_from_state
@@ -111,7 +110,7 @@ class MessageHandler:
 
         # The scheduled call to self._expire_event. None if no call is currently
         # scheduled.
-        self._scheduled_expiry: Optional[IDelayedCall] = None
+        self._scheduled_expiry: IDelayedCall | None = None
 
         if not hs.config.worker.worker_app:
             self.hs.run_as_background_process(
@@ -434,11 +433,14 @@ class MessageHandler:
 
         # Figure out how many seconds we need to wait before expiring the event.
         now_ms = self.clock.time_msec()
-        delay = Duration(milliseconds=max(expiry_ts - now_ms, 0))
+        delay = (expiry_ts - now_ms) / 1000
 
-        logger.info(
+        # callLater doesn't support negative delays, so trim the delay to 0 if we're
-            "Scheduling expiry for event %s in %.3fs", event_id, delay.as_secs()
+        # in that case.
-        )
+        if delay < 0:
+            delay = 0
+
+        logger.info("Scheduling expiry for event %s in %.3fs", event_id, delay)
 
         self._scheduled_expiry = self.clock.call_later(
             delay,
@@ -549,7 +551,7 @@ class EventCreationHandler:
                     "send_dummy_events_to_fill_extremities",
                     self._send_dummy_events_to_fill_extremities,
                 ),
-                Duration(minutes=5),
+                5 * 60 * 1000,
             )
 
         self._message_handler = hs.get_message_handler()
@@ -1010,7 +1012,7 @@ class EventCreationHandler:
 
         if not ignore_shadow_ban and requester.shadow_banned:
             # We randomly sleep a bit just to annoy the requester.
-            await self.clock.sleep(Duration(seconds=random.randint(1, 10)))
+            await self.clock.sleep(random.randint(1, 10))
             raise ShadowBanError()
 
         room_version = None
@@ -1513,7 +1515,7 @@ class EventCreationHandler:
                 and requester.shadow_banned
             ):
                 # We randomly sleep a bit just to annoy the requester.
-                await self.clock.sleep(Duration(seconds=random.randint(1, 10)))
+                await self.clock.sleep(random.randint(1, 10))
                 raise ShadowBanError()
 
             if event.is_state():
@@ -1955,12 +1957,6 @@ class EventCreationHandler:
                 room_alias_str = event.content.get("alias", None)
                 directory_handler = self.hs.get_directory_handler()
                 if room_alias_str and room_alias_str != original_alias:
-                    if not isinstance(room_alias_str, str):
-                        raise SynapseError(
-                            400,
-                            "The alias must be of type string.",
-                            Codes.INVALID_PARAM,
-                        )
                     await self._validate_canonical_alias(
                         directory_handler, room_alias_str, event.room_id
                     )
@@ -1984,12 +1980,6 @@ class EventCreationHandler:
                 new_alt_aliases = set(alt_aliases) - set(original_alt_aliases)
                 if new_alt_aliases:
                     for alias_str in new_alt_aliases:
-                        if not isinstance(alias_str, str):
-                            raise SynapseError(
-                                400,
-                                "Each alt_alias must be of type string.",
-                                Codes.INVALID_PARAM,
-                            )
                         await self._validate_canonical_alias(
                             directory_handler, alias_str, event.room_id
                         )

synapse/handlers/pagination.py

@@ -21,31 +21,27 @@
 import logging
 from typing import TYPE_CHECKING, cast
 
-import attr
-
 from twisted.python.failure import Failure
 
 from synapse.api.constants import Direction, EventTypes, Membership
 from synapse.api.errors import SynapseError
 from synapse.api.filtering import Filter
-from synapse.events import EventBase
+from synapse.events.utils import SerializeEventConfig
-from synapse.handlers.relations import BundledAggregations
 from synapse.handlers.worker_lock import NEW_EVENT_DURING_PURGE_LOCK_NAME
 from synapse.logging.opentracing import trace
 from synapse.rest.admin._base import assert_user_is_admin
 from synapse.streams.config import PaginationConfig
 from synapse.types import (
+    JsonDict,
     JsonMapping,
     Requester,
     ScheduledTask,
     StreamKeyType,
-    StreamToken,
     TaskStatus,
 )
 from synapse.types.handlers import ShutdownRoomParams, ShutdownRoomResponse
 from synapse.types.state import StateFilter
 from synapse.util.async_helpers import ReadWriteLock
-from synapse.util.duration import Duration
 from synapse.visibility import filter_events_for_client
 
 if TYPE_CHECKING:
@@ -73,58 +69,6 @@ PURGE_ROOM_ACTION_NAME = "purge_room"
 SHUTDOWN_AND_PURGE_ROOM_ACTION_NAME = "shutdown_and_purge_room"
 
 
-@attr.s(slots=True, frozen=True, auto_attribs=True)
-class GetMessagesResult:
-    """
-    Everything needed to serialize a `/messages` response.
-    """
-
-    messages_chunk: list[EventBase]
-    """
-    A list of room events.
-
-     - When the request is `Direction.FORWARDS`, events will be in the range:
-       `start_token` < x <= `end_token`, (ascending topological_order)
-     - When the request is `Direction.BACKWARDS`, events will be in the range:
-       `start_token` >= x > `end_token`, (descending topological_order)
-
-    Note that an empty chunk does not necessarily imply that no more events are
-    available. Clients should continue to paginate until no `end_token` property is returned.
-    """
-
-    bundled_aggregations: dict[str, BundledAggregations]
-    """
-    A map of event ID to the bundled aggregations for the events in the chunk.
-
-    If an event doesn't have any bundled aggregations, it may not appear in the map.
-    """
-
-    state: list[EventBase] | None
-    """
-    A list of state events relevant to showing the chunk. For example, if
-    lazy_load_members is enabled in the filter then this may contain the membership
-    events for the senders of events in the chunk.
-
-    Omitted from the response when `None`.
-    """
-
-    start_token: StreamToken
-    """
-    Token corresponding to the start of chunk. This will be the same as the value given
-    in `from` query parameter of the `/messages` request.
-    """
-
-    end_token: StreamToken | None
-    """
-    A token corresponding to the end of chunk. This token can be passed back to this
-    endpoint to request further events.
-
-    If no further events are available (either because we have reached the start of the
-    timeline, or because the user does not have permission to see any more events), this
-    property is omitted from the response.
-    """
-
-
 class PaginationHandler:
     """Handles pagination and purge history requests.
 
@@ -172,7 +116,7 @@ class PaginationHandler:
 
                 self.clock.looping_call(
                     self.hs.run_as_background_process,
-                    Duration(milliseconds=job.interval),
+                    job.interval,
                     "purge_history_for_rooms_in_range",
                     self.purge_history_for_rooms_in_range,
                     job.shortest_max_lifetime,
@@ -473,7 +417,7 @@ class PaginationHandler:
         as_client_event: bool = True,
         event_filter: Filter | None = None,
         use_admin_priviledge: bool = False,
-    ) -> GetMessagesResult:
+    ) -> JsonDict:
         """Get messages in a room.
 
         Args:
@@ -672,13 +616,10 @@ class PaginationHandler:
         # In that case we do not return end, to tell the client
         # there is no need for further queries.
         if not events:
-            return GetMessagesResult(
+            return {
-                messages_chunk=[],
+                "chunk": [],
-                bundled_aggregations={},
+                "start": await from_token.to_string(self.store),
-                state=None,
+            }
-                start_token=from_token,
-                end_token=None,
-            )
 
         if event_filter:
             events = await event_filter.filter(events)
@@ -694,13 +635,11 @@ class PaginationHandler:
         # if after the filter applied there are no more events
         # return immediately - but there might be more in next_token batch
         if not events:
-            return GetMessagesResult(
+            return {
-                messages_chunk=[],
+                "chunk": [],
-                bundled_aggregations={},
+                "start": await from_token.to_string(self.store),
-                state=None,
+                "end": await next_token.to_string(self.store),
-                start_token=from_token,
+            }
-                end_token=next_token,
-            )
 
         state = None
         if event_filter and event_filter.lazy_load_members and len(events) > 0:
@@ -717,20 +656,38 @@ class PaginationHandler:
 
             if state_ids:
                 state_dict = await self.store.get_events(list(state_ids.values()))
-                state = list(state_dict.values())
+                state = state_dict.values()
 
         aggregations = await self._relations_handler.get_bundled_aggregations(
             events, user_id
         )
 
-        return GetMessagesResult(
+        time_now = self.clock.time_msec()
-            messages_chunk=events,
+
-            bundled_aggregations=aggregations,
+        serialize_options = SerializeEventConfig(
-            state=state,
+            as_client_event=as_client_event, requester=requester
-            start_token=from_token,
-            end_token=next_token,
         )
 
+        chunk = {
+            "chunk": (
+                await self._event_serializer.serialize_events(
+                    events,
+                    time_now,
+                    config=serialize_options,
+                    bundle_aggregations=aggregations,
+                )
+            ),
+            "start": await from_token.to_string(self.store),
+            "end": await next_token.to_string(self.store),
+        }
+
+        if state:
+            chunk["state"] = await self._event_serializer.serialize_events(
+                state, time_now, config=serialize_options
+            )
+
+        return chunk
+
     async def _shutdown_and_purge_room(
         self,
         task: ScheduledTask,

synapse/handlers/presence.py

@@ -121,7 +121,6 @@ from synapse.types import (
     get_domain_from_id,
 )
 from synapse.util.async_helpers import Linearizer
-from synapse.util.duration import Duration
 from synapse.util.metrics import Measure
 from synapse.util.wheel_timer import WheelTimer
 
@@ -204,7 +203,7 @@ EXTERNAL_PROCESS_EXPIRY = 5 * 60 * 1000
 
 # Delay before a worker tells the presence handler that a user has stopped
 # syncing.
-UPDATE_SYNCING_USERS = Duration(seconds=10)
+UPDATE_SYNCING_USERS_MS = 10 * 1000
 
 assert LAST_ACTIVE_GRANULARITY < IDLE_TIMER
 
@@ -529,7 +528,7 @@ class WorkerPresenceHandler(BasePresenceHandler):
         self._bump_active_client = ReplicationBumpPresenceActiveTime.make_client(hs)
         self._set_state_client = ReplicationPresenceSetState.make_client(hs)
 
-        self.clock.looping_call(self.send_stop_syncing, UPDATE_SYNCING_USERS)
+        self.clock.looping_call(self.send_stop_syncing, UPDATE_SYNCING_USERS_MS)
 
         hs.register_async_shutdown_handler(
             phase="before",
@@ -582,7 +581,7 @@ class WorkerPresenceHandler(BasePresenceHandler):
         for (user_id, device_id), last_sync_ms in list(
             self._user_devices_going_offline.items()
         ):
-            if now - last_sync_ms > UPDATE_SYNCING_USERS.as_millis():
+            if now - last_sync_ms > UPDATE_SYNCING_USERS_MS:
                 self._user_devices_going_offline.pop((user_id, device_id), None)
                 self.send_user_sync(user_id, device_id, False, last_sync_ms)
 
@@ -862,20 +861,20 @@ class PresenceHandler(BasePresenceHandler):
             # The initial delay is to allow disconnected clients a chance to
             # reconnect before we treat them as offline.
             self.clock.call_later(
-                Duration(seconds=30),
+                30,
                 self.clock.looping_call,
                 self._handle_timeouts,
-                Duration(seconds=5),
+                5000,
             )
 
         # Presence information is persisted, whether or not it is being tracked
         # internally.
         if self._presence_enabled:
             self.clock.call_later(
-                Duration(minutes=1),
+                60,
                 self.clock.looping_call,
                 self._persist_unpersisted_changes,
-                Duration(minutes=1),
+                60 * 1000,
             )
 
         presence_wheel_timer_size_gauge.register_hook(
@@ -2431,7 +2430,7 @@ class PresenceFederationQueue:
     _KEEP_ITEMS_IN_QUEUE_FOR_MS = 5 * 60 * 1000
 
     # How often to check if we can expire entries from the queue.
-    _CLEAR_ITEMS_EVERY_MS = Duration(minutes=1)
+    _CLEAR_ITEMS_EVERY_MS = 60 * 1000
 
     def __init__(self, hs: "HomeServer", presence_handler: BasePresenceHandler):
         self._clock = hs.get_clock()

synapse/handlers/profile.py

@@ -34,7 +34,6 @@ from synapse.api.errors import (
 from synapse.storage.databases.main.media_repository import LocalMedia, RemoteMedia
 from synapse.types import JsonDict, JsonValue, Requester, UserID, create_requester
 from synapse.util.caches.descriptors import cached
-from synapse.util.duration import Duration
 from synapse.util.stringutils import parse_and_validate_mxc_uri
 
 if TYPE_CHECKING:
@@ -584,7 +583,7 @@ class ProfileHandler:
         # Do not actually update the room state for shadow-banned users.
         if requester.shadow_banned:
             # We randomly sleep a bit just to annoy the requester.
-            await self.clock.sleep(Duration(seconds=random.randint(1, 10)))
+            await self.clock.sleep(random.randint(1, 10))
             return
 
         room_ids = await self.store.get_rooms_for_user(target_user.to_string())

synapse/handlers/room.py

@@ -92,7 +92,6 @@ from synapse.types.state import StateFilter
 from synapse.util import stringutils
 from synapse.util.async_helpers import concurrently_execute
 from synapse.util.caches.response_cache import ResponseCache
-from synapse.util.duration import Duration
 from synapse.util.iterutils import batch_iter
 from synapse.util.stringutils import parse_and_validate_server_name
 from synapse.visibility import filter_events_for_client
@@ -1180,7 +1179,7 @@ class RoomCreationHandler:
 
         if (invite_list or invite_3pid_list) and requester.shadow_banned:
             # We randomly sleep a bit just to annoy the requester.
-            await self.clock.sleep(Duration(seconds=random.randint(1, 10)))
+            await self.clock.sleep(random.randint(1, 10))
 
             # Allow the request to go through, but remove any associated invites.
             invite_3pid_list = []

synapse/handlers/room_member.py

@@ -66,7 +66,6 @@ from synapse.types import (
 from synapse.types.state import StateFilter
 from synapse.util.async_helpers import Linearizer
 from synapse.util.distributor import user_left_room
-from synapse.util.duration import Duration
 
 if TYPE_CHECKING:
     from synapse.server import HomeServer
@@ -643,7 +642,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
 
         if action == Membership.INVITE and requester.shadow_banned:
             # We randomly sleep a bit just to annoy the requester.
-            await self.clock.sleep(Duration(seconds=random.randint(1, 10)))
+            await self.clock.sleep(random.randint(1, 10))
             raise ShadowBanError()
 
         key = (room_id,)
@@ -874,7 +873,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
             if target_id == self._server_notices_mxid:
                 raise SynapseError(HTTPStatus.FORBIDDEN, "Cannot invite this user")
 
-            block_invite_result: tuple[Codes, dict] | None = None
+            block_invite_result = None
 
             if (
                 self._server_notices_mxid is not None
@@ -1648,7 +1647,7 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
 
         if requester.shadow_banned:
             # We randomly sleep a bit just to annoy the requester.
-            await self.clock.sleep(Duration(seconds=random.randint(1, 10)))
+            await self.clock.sleep(random.randint(1, 10))
             raise ShadowBanError()
 
         # We need to rate limit *before* we send out any 3PID invites, so we
@@ -2191,7 +2190,7 @@ class RoomForgetterHandler(StateDeltasHandler):
 
             # We kick this off to pick up outstanding work from before the last restart.
             self._clock.call_later(
-                Duration(seconds=0),
+                0,
                 self.notify_new_event,
             )
 
@@ -2233,7 +2232,7 @@ class RoomForgetterHandler(StateDeltasHandler):
             #
             # We wait for a short time so that we don't "tight" loop just
             # keeping the table up to date.
-            await self._clock.sleep(Duration(milliseconds=500))
+            await self._clock.sleep(0.5)
 
             self.pos = self._store.get_room_max_stream_ordering()
             await self._store.update_room_forgetter_stream_pos(self.pos)

synapse/handlers/sliding_sync/__init__.py

@@ -17,7 +17,6 @@ import logging
 from itertools import chain
 from typing import TYPE_CHECKING, AbstractSet, Mapping
 
-import attr
 from prometheus_client import Histogram
 from typing_extensions import assert_never
 
@@ -63,7 +62,6 @@ from synapse.types.handlers.sliding_sync import (
     HaveSentRoomFlag,
     MutablePerConnectionState,
     PerConnectionState,
-    RoomLazyMembershipChanges,
     RoomSyncConfig,
     SlidingSyncConfig,
     SlidingSyncResult,
@@ -108,7 +106,7 @@ class SlidingSyncHandler:
         self.rooms_to_exclude_globally = hs.config.server.rooms_to_exclude_from_sync
         self.is_mine_id = hs.is_mine_id
 
-        self.connection_store = SlidingSyncConnectionStore(self.clock, self.store)
+        self.connection_store = SlidingSyncConnectionStore(self.store)
         self.extensions = SlidingSyncExtensionHandler(hs)
         self.room_lists = SlidingSyncRoomLists(hs)
 
@@ -763,6 +761,8 @@ class SlidingSyncHandler:
                 != Membership.JOIN,
                 filter_send_to_client=True,
             )
+            # TODO: Filter out `EventTypes.CallInvite` in public rooms,
+            # see https://github.com/element-hq/synapse/issues/17359
 
             # TODO: Handle timeline gaps (`get_timeline_gaps()`)
 
@@ -983,15 +983,14 @@ class SlidingSyncHandler:
         #
         # Calculate the `StateFilter` based on the `required_state` for the room
         required_state_filter = StateFilter.none()
-
+        # The requested `required_state_map` with the lazy membership expanded and
-        # Keep track of which users' state we may need to fetch. We split this
+        # `$ME` replaced with the user's ID. This allows us to see what membership we've
-        # into explicit users and lazy loaded users.
+        # sent down to the client in the next request.
-        explicit_user_state = set()
+        #
-        lazy_load_user_ids = set()
+        # Make a copy so we can modify it. Still need to be careful to make a copy of
-
+        # the state key sets if we want to add/remove from them. We could make a deep
-        # Whether lazy-loading of room members is enabled.
+        # copy but this saves us some work.
-        lazy_load_room_members = False
+        expanded_required_state_map = dict(room_sync_config.required_state_map)
-
         if room_membership_for_user_at_to_token.membership not in (
             Membership.INVITE,
             Membership.KNOCK,
@@ -1039,6 +1038,7 @@ class SlidingSyncHandler:
             else:
                 required_state_types: list[tuple[str, str | None]] = []
                 num_wild_state_keys = 0
+                lazy_load_room_members = False
                 num_others = 0
                 for (
                     state_type,
@@ -1070,60 +1070,43 @@ class SlidingSyncHandler:
                                             timeline_event.state_key
                                         )
 
-                            # The client needs to know the membership of everyone in
-                            # the timeline we're returning.
-                            lazy_load_user_ids.update(timeline_membership)
-
                             # Update the required state filter so we pick up the new
                             # membership
-                            if limited or initial:
-                                # If the timeline is limited, we only need to
-                                # return the membership changes for people in
-                                # the timeline.
                             for user_id in timeline_membership:
                                 required_state_types.append(
                                     (EventTypes.Member, user_id)
                                 )
-                            else:
-                                # For non-limited timelines we always return all
-                                # membership changes. This is so that clients
-                                # who have fetched the full membership list
-                                # already can continue to maintain it for
-                                # non-limited syncs.
-                                #
-                                # This assumes that for non-limited syncs there
-                                # won't be many membership changes that wouldn't
-                                # have been included already (this can only
-                                # happen if membership state was rolled back due
-                                # to state resolution anyway).
-                                #
-                                # `None` is a wildcard in the `StateFilter`
-                                required_state_types.append((EventTypes.Member, None))
 
-                                # Record the extra members we're returning.
+                            # Add an explicit entry for each user in the timeline
-                                lazy_load_user_ids.update(
+                            #
-                                    state_key
+                            # Make a new set or copy of the state key set so we can
-                                    for event_type, state_key in room_state_delta_id_map
+                            # modify it without affecting the original
-                                    if event_type == EventTypes.Member
+                            # `required_state_map`
+                            expanded_required_state_map[EventTypes.Member] = (
+                                expanded_required_state_map.get(
+                                    EventTypes.Member, set()
                                 )
-                        else:
+                                | timeline_membership
+                            )
+                        elif state_key == StateValues.ME:
                             num_others += 1
-
+                            required_state_types.append((state_type, user.to_string()))
                             # Replace `$ME` with the user's ID so we can deduplicate
                             # when someone requests the same state with `$ME` or with
                             # their user ID.
-                            normalized_state_key = state_key
+                            #
-                            if state_key == StateValues.ME:
+                            # Make a new set or copy of the state key set so we can
-                                normalized_state_key = user.to_string()
+                            # modify it without affecting the original
-
+                            # `required_state_map`
-                            if state_type == EventTypes.Member:
+                            expanded_required_state_map[EventTypes.Member] = (
-                                # Also track explicitly requested member state for
+                                expanded_required_state_map.get(
-                                # lazy membership tracking.
+                                    EventTypes.Member, set()
-                                explicit_user_state.add(normalized_state_key)
-
-                            required_state_types.append(
-                                (state_type, normalized_state_key)
                                 )
+                                | {user.to_string()}
+                            )
+                        else:
+                            num_others += 1
+                            required_state_types.append((state_type, state_key))
 
                 set_tag(
                     SynapseTags.FUNC_ARG_PREFIX
@@ -1141,10 +1124,6 @@ class SlidingSyncHandler:
 
                 required_state_filter = StateFilter.from_types(required_state_types)
 
-        # Remove any explicitly requested user state from the lazy-loaded set,
-        # as we track them separately.
-        lazy_load_user_ids -= explicit_user_state
-
         # We need this base set of info for the response so let's just fetch it along
         # with the `required_state` for the room
         hero_room_state = [
@@ -1172,22 +1151,6 @@ class SlidingSyncHandler:
         # We can return all of the state that was requested if this was the first
         # time we've sent the room down this connection.
         room_state: StateMap[EventBase] = {}
-
-        # Includes the state for the heroes if we need them (may contain other
-        # state as well).
-        hero_membership_state: StateMap[EventBase] = {}
-
-        # By default, we mark all `lazy_load_user_ids` as being sent down
-        # for the first time in this sync. We later check if we sent any of them
-        # down previously and update `returned_user_id_to_last_seen_ts_map` if
-        # we have.
-        returned_user_id_to_last_seen_ts_map = {}
-        if lazy_load_room_members:
-            returned_user_id_to_last_seen_ts_map = dict.fromkeys(lazy_load_user_ids)
-        new_connection_state.room_lazy_membership[room_id] = RoomLazyMembershipChanges(
-            returned_user_id_to_last_seen_ts_map=returned_user_id_to_last_seen_ts_map
-        )
-
         if initial:
             room_state = await self.get_current_state_at(
                 room_id=room_id,
@@ -1195,97 +1158,28 @@ class SlidingSyncHandler:
                 state_filter=state_filter,
                 to_token=to_token,
             )
-
-            # The `room_state` includes the hero membership state if needed.
-            # We'll later filter this down so we don't need to do so here.
-            hero_membership_state = room_state
         else:
-            assert from_token is not None
             assert from_bound is not None
 
             if prev_room_sync_config is not None:
-                # Define `all_required_user_state` as all user state we want, which
-                # is the explicitly requested members, any needed for lazy
-                # loading, and users whose membership has changed.
-                all_required_user_state = explicit_user_state | lazy_load_user_ids
-                for state_type, state_key in room_state_delta_id_map:
-                    if state_type == EventTypes.Member:
-                        all_required_user_state.add(state_key)
-
-                # We need to know what user state we previously sent down the
-                # connection so we can determine what has changed.
-                #
-                # We need to fetch all users whose memberships we may want
-                # to send down this sync. This includes (and matches
-                # `all_required_user_state`):
-                #   1. Explicitly requested user state
-                #   2. Lazy loaded members, i.e. users who appear in the
-                #      timeline.
-                #   3. The users whose membership has changed in the room, i.e.
-                #      in the state deltas.
-                #
-                # This is to correctly handle the cases where a user was
-                # previously sent down as a lazy loaded member:
-                #   - and is now explicitly requested (so shouldn't be sent down
-                #     again); or
-                #   - their membership has changed (so we need to invalidate
-                #     their entry in the lazy loaded table if we don't send the
-                #     change down).
-                if all_required_user_state:
-                    previously_returned_user_to_last_seen = (
-                        await self.store.get_sliding_sync_connection_lazy_members(
-                            connection_position=from_token.connection_position,
-                            room_id=room_id,
-                            user_ids=all_required_user_state,
-                        )
-                    )
-
-                    # Update the room lazy membership changes to track which
-                    # lazy loaded members were needed for this sync. This is so
-                    # that we can correctly track the last time we sent down
-                    # users' membership (and so can evict old membership state
-                    # from the DB tables).
-                    returned_user_id_to_last_seen_ts_map.update(
-                        (user_id, timestamp)
-                        for user_id, timestamp in previously_returned_user_to_last_seen.items()
-                        if user_id in lazy_load_user_ids
-                    )
-                else:
-                    previously_returned_user_to_last_seen = {}
-
                 # Check if there are any changes to the required state config
                 # that we need to handle.
-                changes_return = _required_state_changes(
+                changed_required_state_map, added_state_filter = (
+                    _required_state_changes(
                         user.to_string(),
                         prev_required_state_map=prev_room_sync_config.required_state_map,
-                    request_required_state_map=room_sync_config.required_state_map,
+                        request_required_state_map=expanded_required_state_map,
-                    previously_returned_lazy_user_ids=previously_returned_user_to_last_seen.keys(),
-                    request_lazy_load_user_ids=lazy_load_user_ids,
                         state_deltas=room_state_delta_id_map,
                     )
-                changed_required_state_map = changes_return.changed_required_state_map
+                )
 
-                new_connection_state.room_lazy_membership[
+                if added_state_filter:
-                    room_id
-                ].invalidated_user_ids = changes_return.lazy_members_invalidated
-
-                # Add any previously returned explicit memberships to the lazy
-                # loaded table. This happens when a client requested explicit
-                # members and then converted them to lazy loading.
-                for user_id in changes_return.extra_users_to_add_to_lazy_cache:
-                    # We don't know the right timestamp to use here, as we don't
-                    # know the last time we would have sent the membership down.
-                    # So we don't overwrite it if we have a timestamp already,
-                    # and fallback to `None` (which means now) if we don't.
-                    returned_user_id_to_last_seen_ts_map.setdefault(user_id, None)
-
-                if changes_return.added_state_filter:
                     # Some state entries got added, so we pull out the current
                     # state for them. If we don't do this we'd only send down new deltas.
                     state_ids = await self.get_current_state_ids_at(
                         room_id=room_id,
                         room_membership_for_user_at_to_token=room_membership_for_user_at_to_token,
-                        state_filter=changes_return.added_state_filter,
+                        state_filter=added_state_filter,
                         to_token=to_token,
                     )
                     room_state_delta_id_map.update(state_ids)
@@ -1297,7 +1191,6 @@ class SlidingSyncHandler:
 
             # If the membership changed and we have to get heroes, get the remaining
             # heroes from the state
-            hero_membership_state = {}
             if hero_user_ids:
                 hero_membership_state = await self.get_current_state_at(
                     room_id=room_id,
@@ -1305,6 +1198,7 @@ class SlidingSyncHandler:
                     state_filter=StateFilter.from_types(hero_room_state),
                     to_token=to_token,
                 )
+                room_state.update(hero_membership_state)
 
         required_room_state: StateMap[EventBase] = {}
         if required_state_filter != StateFilter.none():
@@ -1327,7 +1221,7 @@ class SlidingSyncHandler:
         # Assemble heroes: extract the info from the state we just fetched
         heroes: list[SlidingSyncResult.RoomResult.StrippedHero] = []
         for hero_user_id in hero_user_ids:
-            member_event = hero_membership_state.get((EventTypes.Member, hero_user_id))
+            member_event = room_state.get((EventTypes.Member, hero_user_id))
             if member_event is not None:
                 heroes.append(
                     SlidingSyncResult.RoomResult.StrippedHero(
@@ -1389,7 +1283,7 @@ class SlidingSyncHandler:
             bump_stamp = 0
 
         room_sync_required_state_map_to_persist: Mapping[str, AbstractSet[str]] = (
-            room_sync_config.required_state_map
+            expanded_required_state_map
         )
         if changed_required_state_map:
             room_sync_required_state_map_to_persist = changed_required_state_map
@@ -1579,37 +1473,13 @@ class SlidingSyncHandler:
             return None
 
 
-@attr.s(auto_attribs=True)
-class _RequiredStateChangesReturn:
-    """Return type for _required_state_changes."""
-
-    changed_required_state_map: Mapping[str, AbstractSet[str]] | None
-    """The updated required state map to store in the room config, or None if
-    there is no change."""
-
-    added_state_filter: StateFilter
-    """The state filter to use to fetch any additional current state that needs
-    to be returned to the client."""
-
-    extra_users_to_add_to_lazy_cache: AbstractSet[str] = frozenset()
-    """The set of user IDs we should add to the lazy members cache that we had
-    previously returned. Handles the case where a user was previously sent down
-    explicitly but is now being lazy loaded."""
-
-    lazy_members_invalidated: AbstractSet[str] = frozenset()
-    """The set of user IDs whose membership has changed but we didn't send down,
-    so we need to invalidate them from the cache."""
-
-
 def _required_state_changes(
     user_id: str,
     *,
     prev_required_state_map: Mapping[str, AbstractSet[str]],
     request_required_state_map: Mapping[str, AbstractSet[str]],
-    previously_returned_lazy_user_ids: AbstractSet[str],
-    request_lazy_load_user_ids: AbstractSet[str],
     state_deltas: StateMap[str],
-) -> _RequiredStateChangesReturn:
+) -> tuple[Mapping[str, AbstractSet[str]] | None, StateFilter]:
     """Calculates the changes between the required state room config from the
     previous requests compared with the current request.
 
@@ -1623,62 +1493,14 @@ def _required_state_changes(
     added, removed and then added again to the required state. In that case we
     only want to re-send that entry down sync if it has changed.
 
-    Args:
+    Returns:
-        user_id: The user ID of the user making the request.
+        A 2-tuple of updated required state config (or None if there is no update)
-        prev_required_state_map: The required state map from the previous
+        and the state filter to use to fetch extra current state that we need to
-            request.
+        return.
-        request_required_state_map: The required state map from the current
-            request.
-        previously_returned_lazy_user_ids: The set of user IDs whose membership
-            we have previously returned to the client due to lazy loading. This
-            is filtered to only include users who have either sent events in the
-            `timeline`, `required_state` or whose membership changed.
-        request_lazy_load_user_ids: The set of user IDs whose lazy-loaded
-            membership is required for this request.
-        state_deltas: The state deltas in the room in the request token range,
-            considering user membership. See `get_current_state_deltas_for_room`
-            for more details.
     """
-
-    # First we find any lazy members that have been invalidated due to state
-    # changes that we are not sending down.
-    lazy_members_invalidated = set()
-    for event_type, state_key in state_deltas:
-        if event_type != EventTypes.Member:
-            continue
-
-        if state_key in request_lazy_load_user_ids:
-            # Because it's part of the `request_lazy_load_user_ids`, we're going to
-            # send this member change down.
-            continue
-
-        if state_key not in previously_returned_lazy_user_ids:
-            # We've not previously returned this member so nothing to
-            # invalidate.
-            continue
-
-        lazy_members_invalidated.add(state_key)
-
     if prev_required_state_map == request_required_state_map:
-        # There has been no change in state, just need to check lazy members.
+        # There has been no change. Return immediately.
-        newly_returned_lazy_members = (
+        return None, StateFilter.none()
-            request_lazy_load_user_ids - previously_returned_lazy_user_ids
-        )
-        if newly_returned_lazy_members:
-            # There are some new lazy members we need to fetch.
-            added_types: list[tuple[str, str | None]] = []
-            for new_user_id in newly_returned_lazy_members:
-                added_types.append((EventTypes.Member, new_user_id))
-
-            added_state_filter = StateFilter.from_types(added_types)
-        else:
-            added_state_filter = StateFilter.none()
-
-        return _RequiredStateChangesReturn(
-            changed_required_state_map=None,
-            added_state_filter=added_state_filter,
-            lazy_members_invalidated=lazy_members_invalidated,
-        )
 
     prev_wildcard = prev_required_state_map.get(StateValues.WILDCARD, set())
     request_wildcard = request_required_state_map.get(StateValues.WILDCARD, set())
@@ -1688,29 +1510,17 @@ def _required_state_changes(
     # already fetching everything, we don't have to fetch anything now that they've
     # narrowed.
     if StateValues.WILDCARD in prev_wildcard:
-        return _RequiredStateChangesReturn(
+        return request_required_state_map, StateFilter.none()
-            changed_required_state_map=request_required_state_map,
-            added_state_filter=StateFilter.none(),
-            lazy_members_invalidated=lazy_members_invalidated,
-        )
 
     # If a event type wildcard has been added or removed we don't try and do
     # anything fancy, and instead always update the effective room required
     # state config to match the request.
     if request_wildcard - prev_wildcard:
         # Some keys were added, so we need to fetch everything
-        return _RequiredStateChangesReturn(
+        return request_required_state_map, StateFilter.all()
-            changed_required_state_map=request_required_state_map,
-            added_state_filter=StateFilter.all(),
-            lazy_members_invalidated=lazy_members_invalidated,
-        )
     if prev_wildcard - request_wildcard:
         # Keys were only removed, so we don't have to fetch everything.
-        return _RequiredStateChangesReturn(
+        return request_required_state_map, StateFilter.none()
-            changed_required_state_map=request_required_state_map,
-            added_state_filter=StateFilter.none(),
-            lazy_members_invalidated=lazy_members_invalidated,
-        )
 
     # Contains updates to the required state map compared with the previous room
     # config. This has the same format as `RoomSyncConfig.required_state`
@@ -1742,17 +1552,6 @@ def _required_state_changes(
             # Nothing *added*, so we skip. Removals happen below.
             continue
 
-        # Handle the special case of adding `$LAZY` membership, where we want to
-        # always record the change to be lazy loading, as we immediately start
-        # using the lazy loading tables so there is no point *not* recording the
-        # change to lazy load in the effective room config.
-        if event_type == EventTypes.Member:
-            old_state_key_lazy = StateValues.LAZY in old_state_keys
-            request_state_key_lazy = StateValues.LAZY in request_state_keys
-            if not old_state_key_lazy and request_state_key_lazy:
-                changes[event_type] = request_state_keys
-                continue
-
         # We only remove state keys from the effective state if they've been
         # removed from the request *and* the state has changed. This ensures
         # that if a client removes and then re-adds a state key, we only send
@@ -1823,31 +1622,9 @@ def _required_state_changes(
                     # LAZY values should also be ignore for event types that are
                     # not membership.
                     pass
-                elif event_type == EventTypes.Member:
-                    if state_key not in previously_returned_lazy_user_ids:
-                        # Only add *explicit* members we haven't previously sent
-                        # down.
-                        added.append((event_type, state_key))
                 else:
                     added.append((event_type, state_key))
 
-    previously_required_state_members = set(
-        prev_required_state_map.get(EventTypes.Member, ())
-    )
-    if StateValues.ME in previously_required_state_members:
-        previously_required_state_members.add(user_id)
-
-    # We also need to pull out any lazy members that are now required but
-    # haven't previously been returned.
-    for required_user_id in (
-        request_lazy_load_user_ids
-        # Remove previously returned users
-        - previously_returned_lazy_user_ids
-        # Exclude previously explicitly requested members.
-        - previously_required_state_members
-    ):
-        added.append((EventTypes.Member, required_user_id))
-
     added_state_filter = StateFilter.from_types(added)
 
     # Figure out what changes we need to apply to the effective required state
@@ -1888,25 +1665,13 @@ def _required_state_changes(
             changes[event_type] = request_state_keys
             continue
 
-        # When handling $LAZY membership, we want to either a) not update the
-        # state or b) update it to match the request. This is to avoid churn of
-        # the effective required state for rooms (we deduplicate required state
-        # between rooms), and because we can store the previously returned
-        # explicit memberships with the lazy loaded memberships.
         if event_type == EventTypes.Member:
             old_state_key_lazy = StateValues.LAZY in old_state_keys
             request_state_key_lazy = StateValues.LAZY in request_state_keys
-            has_lazy = old_state_key_lazy or request_state_key_lazy
 
-            # If a "$LAZY" has been added or removed we always update to match
-            # the request.
             if old_state_key_lazy != request_state_key_lazy:
-                changes[event_type] = request_state_keys
+                # If a "$LAZY" has been added or removed we always update the effective room
-                continue
+                # required state config to match the request.
-
-            # Or if we have lazy membership and there are invalidated
-            # explicit memberships.
-            if has_lazy and invalidated_state_keys:
                 changes[event_type] = request_state_keys
                 continue
 
@@ -1921,28 +1686,6 @@ def _required_state_changes(
         if invalidated_state_keys:
             changes[event_type] = old_state_keys - invalidated_state_keys
 
-    # Check for any explicit membership changes that were removed that we can
-    # add to the lazy members previously returned. This is so that we don't
-    # return a user due to lazy loading if they were previously returned as an
-    # explicit membership.
-    users_to_add_to_lazy_cache: set[str] = set()
-
-    membership_changes = changes.get(EventTypes.Member, set())
-    if membership_changes and StateValues.LAZY in request_state_keys:
-        for state_key in prev_required_state_map.get(EventTypes.Member, set()):
-            if state_key == StateValues.WILDCARD or state_key == StateValues.LAZY:
-                # Ignore non-user IDs.
-                continue
-
-            if state_key == StateValues.ME:
-                # Normalize to proper user ID
-                state_key = user_id
-
-            # We remember the user if they haven't been invalidated
-            if (EventTypes.Member, state_key) not in state_deltas:
-                users_to_add_to_lazy_cache.add(state_key)
-
-    new_required_state_map = None
     if changes:
         # Update the required state config based on the changes.
         new_required_state_map = dict(prev_required_state_map)
@@ -1953,9 +1696,6 @@ def _required_state_changes(
                 # Remove entries with empty state keys.
                 new_required_state_map.pop(event_type, None)
 
-    return _RequiredStateChangesReturn(
+        return new_required_state_map, added_state_filter
-        changed_required_state_map=new_required_state_map,
+    else:
-        added_state_filter=added_state_filter,
+        return None, added_state_filter
-        lazy_members_invalidated=lazy_members_invalidated,
-        extra_users_to_add_to_lazy_cache=users_to_add_to_lazy_cache,
-    )

synapse/handlers/sliding_sync/room_lists.py

@@ -34,12 +34,10 @@ from synapse.api.constants import (
     EventTypes,
     Membership,
 )
-from synapse.api.errors import SlidingSyncUnknownPosition
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS
 from synapse.events import StrippedStateEvent
 from synapse.events.utils import parse_stripped_state_event
 from synapse.logging.opentracing import start_active_span, trace
-from synapse.storage.databases.main.sliding_sync import UPDATE_INTERVAL_LAST_USED_TS
 from synapse.storage.databases.main.state import (
     ROOM_UNKNOWN_SENTINEL,
     Sentinel as StateSentinel,
@@ -70,7 +68,6 @@ from synapse.types.handlers.sliding_sync import (
 )
 from synapse.types.state import StateFilter
 from synapse.util import MutableOverlayMapping
-from synapse.util.duration import Duration
 from synapse.util.sentinel import Sentinel
 
 if TYPE_CHECKING:
@@ -80,27 +77,6 @@ if TYPE_CHECKING:
 logger = logging.getLogger(__name__)
 
 
-# Minimum time in milliseconds since the last sync before we consider expiring
-# the connection due to too many rooms to send. This stops from getting into
-# tight loops with clients that request lots of data at once.
-#
-# c.f. `NUM_ROOMS_THRESHOLD`. These values are somewhat arbitrary picked.
-MINIMUM_NOT_USED_AGE_EXPIRY = Duration(hours=1)
-
-# How many rooms with updates we allow before we consider the connection expired
-# due to too many rooms to send.
-#
-# c.f. `MINIMUM_NOT_USED_AGE_EXPIRY_MS`. These values are somewhat arbitrary
-# picked.
-NUM_ROOMS_THRESHOLD = 100
-
-# Sanity check that our minimum age is sensible compared to the update interval,
-# i.e. if `MINIMUM_NOT_USED_AGE_EXPIRY_MS` is too small then we might expire the
-# connection even if it is actively being used (and we're just not updating the
-# DB frequently enough). We arbitrarily double the update interval to give some
-# wiggle room.
-assert 2 * UPDATE_INTERVAL_LAST_USED_TS < MINIMUM_NOT_USED_AGE_EXPIRY
-
 # Helper definition for the types that we might return. We do this to avoid
 # copying data between types (which can be expensive for many rooms).
 RoomsForUserType = RoomsForUserStateReset | RoomsForUser | RoomsForUserSlidingSync
@@ -200,7 +176,6 @@ class SlidingSyncRoomLists:
         self.storage_controllers = hs.get_storage_controllers()
         self.rooms_to_exclude_globally = hs.config.server.rooms_to_exclude_from_sync
         self.is_mine_id = hs.is_mine_id
-        self._clock = hs.get_clock()
 
     async def compute_interested_rooms(
         self,
@@ -882,41 +857,11 @@ class SlidingSyncRoomLists:
 
                     # We only need to check for new events since any state changes
                     # will also come down as new events.
-
+                    rooms_that_have_updates = (
-                    rooms_that_have_updates = await (
+                        self.store.get_rooms_that_might_have_updates(
-                        self.store.get_rooms_that_have_updates_since_sliding_sync_table(
                             relevant_room_map.keys(), from_token.room_key
                         )
                     )
-
-                    # Check if we have lots of updates to send, if so then its
-                    # better for us to tell the client to do a full resync
-                    # instead (to try and avoid long SSS response times when
-                    # there is new data).
-                    #
-                    # Due to the construction of the SSS API, the client is in
-                    # charge of setting the range of rooms to request updates
-                    # for. Generally, it will start with a small range and then
-                    # expand (and occasionally it may contract the range again
-                    # if its been offline for a while). If we know there are a
-                    # lot of updates, it's better to reset the connection and
-                    # wait for the client to start again (with a much smaller
-                    # range) than to try and send down a large number of updates
-                    # (which can take a long time).
-                    #
-                    # We only do this if the last sync was over
-                    # `MINIMUM_NOT_USED_AGE_EXPIRY_MS` to ensure we don't get
-                    # into tight loops with clients that keep requesting large
-                    # sliding sync windows.
-                    if len(rooms_that_have_updates) > NUM_ROOMS_THRESHOLD:
-                        last_sync_ts = previous_connection_state.last_used_ts
-                        if (
-                            last_sync_ts is not None
-                            and (self._clock.time_msec() - last_sync_ts)
-                            > MINIMUM_NOT_USED_AGE_EXPIRY.as_millis()
-                        ):
-                            raise SlidingSyncUnknownPosition()
-
                     rooms_should_send.update(rooms_that_have_updates)
                     relevant_rooms_to_send_map = {
                         room_id: room_sync_config

synapse/handlers/sliding_sync/store.py

@@ -13,6 +13,7 @@
 #
 
 import logging
+from typing import TYPE_CHECKING
 
 import attr
 
@@ -24,7 +25,9 @@ from synapse.types.handlers.sliding_sync import (
     PerConnectionState,
     SlidingSyncConfig,
 )
-from synapse.util.clock import Clock
+
+if TYPE_CHECKING:
+    pass
 
 logger = logging.getLogger(__name__)
 
@@ -58,8 +61,7 @@ class SlidingSyncConnectionStore:
             to mapping of room ID to `HaveSentRoom`.
     """
 
-    clock: Clock
+    store: "DataStore"
-    store: DataStore
 
     async def get_and_clear_connection_positions(
         self,
@@ -73,7 +75,7 @@ class SlidingSyncConnectionStore:
         """
         # If this is our first request, there is no previous connection state to fetch out of the database
         if from_token is None or from_token.connection_position == 0:
-            return PerConnectionState(last_used_ts=None)
+            return PerConnectionState()
 
         conn_id = sync_config.conn_id or ""
 
@@ -99,7 +101,7 @@ class SlidingSyncConnectionStore:
         If there are no changes to the state this may return the same token as
         the existing per-connection state.
         """
-        if not new_connection_state.has_updates(self.clock):
+        if not new_connection_state.has_updates():
             if from_token is not None:
                 return from_token.connection_position
             else: