Persist in stitched order

... so that we don't need to have an EventContext when we do the assignment

.ci/scripts/test_synapse_port_db.sh

@@ -61,7 +61,7 @@ poetry run update_synapse_database --database-config .ci/postgres-config-unporte
 echo "+++ Comparing ported schema with unported schema"
 # Ignore the tables that portdb creates. (Should it tidy them up when the porting is completed?)
 psql synapse -c "DROP TABLE port_from_sqlite3;"
-pg_dump --format=plain --schema-only --no-tablespaces --no-acl --no-owner synapse_unported > unported.sql
-pg_dump --format=plain --schema-only --no-tablespaces --no-acl --no-owner synapse          >   ported.sql
+pg_dump --format=plain --schema-only --no-tablespaces --no-acl --no-owner --restrict-key=TESTING synapse_unported > unported.sql
+pg_dump --format=plain --schema-only --no-tablespaces --no-acl --no-owner --restrict-key=TESTING synapse          >   ported.sql
 # By default, `diff` returns zero if there are no changes and nonzero otherwise
-diff -u unported.sql ported.sql | tee schema_diff
+diff -u unported.sql ported.sql | tee schema_diff

.github/workflows/docker.yml

@@ -31,7 +31,7 @@ jobs:
         uses: docker/setup-buildx-action@e468171a9de216ec08956ac3ada2f0791b6bd435 # v3.11.1
 
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        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
@@ -41,13 +41,13 @@ jobs:
           echo "SYNAPSE_VERSION=$(grep "^version" pyproject.toml | sed -E 's/version\s*=\s*["]([^"]*)["]/\1/')" >> $GITHUB_ENV
 
       - name: Log in to DockerHub
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
+        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Log in to GHCR
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
+        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0
         with:
           registry: ghcr.io
           username: ${{ github.repository_owner }}
@@ -95,21 +95,21 @@ jobs:
       - build
     steps:
       - name: Download digests
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
         with:
           path: ${{ runner.temp }}/digests
           pattern: digests-*
           merge-multiple: true
 
       - name: Log in to DockerHub
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
+        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0
         if: ${{ startsWith(matrix.repository, 'docker.io') }}
         with:
           username: ${{ secrets.DOCKERHUB_USERNAME }}
           password: ${{ secrets.DOCKERHUB_TOKEN }}
 
       - name: Log in to GHCR
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
+        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0
         if: ${{ startsWith(matrix.repository, 'ghcr.io') }}
         with:
           registry: ghcr.io
@@ -123,7 +123,7 @@ jobs:
         uses: sigstore/cosign-installer@d58896d6a1865668819e1d91763c7751a165e159 # v3.9.2
 
       - name: Calculate docker image tag
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
+        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
         with:
           images: ${{ matrix.repository }}
           flavor: |

.github/workflows/docs-pr.yaml

@@ -13,7 +13,7 @@ jobs:
     name: GitHub Pages
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           # Fetch all history so that the schema_versions script works.
           fetch-depth: 0
@@ -50,7 +50,7 @@ jobs:
     name: Check links in documentation
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - 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@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           # Fetch all history so that the schema_versions script works.
           fetch-depth: 0

.github/workflows/fix_lint.yaml

@@ -18,10 +18,10 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
           components: clippy, rustfmt

.github/workflows/latest_deps.yml

@@ -42,9 +42,9 @@ jobs:
     if: needs.check_repo.outputs.should_run_workflow == 'true'
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -77,10 +77,10 @@ jobs:
             postgres-version: "14"
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -152,10 +152,10 @@ jobs:
       BLACKLIST: ${{ matrix.workers && 'synapse-blacklist-with-workers' }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -202,7 +202,7 @@ jobs:
 
     steps:
       - name: Check out synapse codebase
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: synapse
 
@@ -234,7 +234,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - 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

@@ -16,7 +16,7 @@ jobs:
     name: "Check locked dependencies have sdists"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: '3.x'

.github/workflows/push_complement_image.yml

@@ -33,29 +33,29 @@ jobs:
       packages: write
     steps:
       - name: Checkout specific branch (debug build)
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        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@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        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@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         if: github.event_name == 'push'
         with:
           ref: master
       - name: Login to registry
-        uses: docker/login-action@74a5d142397b4f367a81961eba4e8cd7edddf772 # v3.4.0
+        uses: docker/login-action@184bdaa0721073962dff0199f1fb9940f07167d1 # v3.5.0
         with:
           registry: ghcr.io
           username: ${{ github.actor }}
           password: ${{ secrets.GITHUB_TOKEN }}
       - name: Work out labels for complement image
         id: meta
-        uses: docker/metadata-action@902fa8ec7d6ecbf8d84d538b9b233a880e428804 # v5.7.0
+        uses: docker/metadata-action@c1e51972afc2121e065aed6d45c65596fe445f3f # v5.8.0
         with:
           images: ghcr.io/${{ github.repository }}/complement-synapse
           tags: |

.github/workflows/release-artifacts.yml

@@ -27,7 +27,7 @@ jobs:
     name: "Calculate list of debian distros"
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.x"
@@ -55,7 +55,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: src
 
@@ -66,7 +66,7 @@ jobs:
           install: true
 
       - name: Set up docker layer caching
-        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
+        uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
         with:
           path: /tmp/.buildx-cache
           key: ${{ runner.os }}-buildx-${{ github.sha }}
@@ -132,7 +132,7 @@ jobs:
             os: "ubuntu-24.04-arm"
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
@@ -165,7 +165,7 @@ jobs:
     if: ${{ !startsWith(github.ref, 'refs/pull/') }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.10"
@@ -191,7 +191,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - name: Download all workflow run artifacts
-        uses: actions/download-artifact@d3f86a106a0bac45b974a628896c90dbdf5c8093 # v4.3.0
+        uses: actions/download-artifact@634f93cb2916e3fdff6788551b99b062d0335ce0 # v5.0.0
       - name: Build a tarball for the debs
         # We need to merge all the debs uploads into one folder, then compress
         # that.

.github/workflows/schema.yaml

@@ -14,7 +14,7 @@ jobs:
     name: Ensure Synapse config schema is valid
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.x"
@@ -40,7 +40,7 @@ jobs:
     name: Ensure generated documentation is up-to-date
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.x"

.github/workflows/tests.yml

@@ -86,9 +86,9 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -106,7 +106,7 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.x"
@@ -116,7 +116,7 @@ jobs:
   check-lockfile:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.x"
@@ -129,7 +129,7 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Setup Poetry
         uses: matrix-org/setup-python-poetry@5bbf6603c5c930615ec8a29f1b5d7d258d905aa4 # v2.0.0
@@ -151,10 +151,10 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -174,7 +174,7 @@ jobs:
       # Cribbed from
       # https://github.com/AustinScola/mypy-cache-github-action/blob/85ea4f2972abed39b33bd02c36e341b28ca59213/src/restore.ts#L10-L17
       - name: Restore/persist mypy's cache
-        uses: actions/cache@5a3ec84eff668545956fd18022155c47e93e2684 # v4.2.3
+        uses: actions/cache@0400d5f644dc74513175e3cd8d07132dd4860809 # v4.2.4
         with:
           path: |
             .mypy_cache
@@ -187,7 +187,7 @@ jobs:
   lint-crlf:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Check line endings
         run: scripts-dev/check_line_terminators.sh
 
@@ -195,7 +195,7 @@ jobs:
     if: ${{ (github.base_ref == 'develop'  || contains(github.base_ref, 'release-')) && github.actor != 'dependabot[bot]' }}
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
@@ -213,11 +213,11 @@ jobs:
     if: ${{ needs.changes.outputs.linting == 'true' }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -233,10 +233,10 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
             components: clippy
             toolchain: ${{ env.RUST_VERSION }}
@@ -252,10 +252,10 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
             toolchain: nightly-2025-04-23
             components: clippy
@@ -270,10 +270,10 @@ jobs:
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -306,10 +306,10 @@ jobs:
     if: ${{ needs.changes.outputs.rust == 'true' }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           # We use nightly so that we can use some unstable options that we use in
           # `.rustfmt.toml`.
@@ -326,7 +326,7 @@ jobs:
     needs: changes
     if: ${{ needs.changes.outputs.linting_readme == 'true' }}
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.x"
@@ -373,10 +373,10 @@ jobs:
 
   calculate-test-jobs:
     if: ${{ !cancelled() && !failure() }} # Allow previous steps to be skipped, but not fail
-    # needs: linting-done
+    needs: linting-done
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: actions/setup-python@a26af69be951a213d495a4c3e4e4022e16d87065 # v5.6.0
         with:
           python-version: "3.x"
@@ -393,12 +393,11 @@ jobs:
       - changes
     runs-on: ubuntu-latest
     strategy:
-      fail-fast: false
       matrix:
         job:  ${{ fromJson(needs.calculate-test-jobs.outputs.trial_test_matrix) }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - run: sudo apt-get -qq install xmlsec1
       - name: Set up PostgreSQL ${{ matrix.job.postgres-version }}
         if: ${{ matrix.job.postgres-version }}
@@ -413,7 +412,7 @@ jobs:
             postgres:${{ matrix.job.postgres-version }}
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -427,24 +426,7 @@ jobs:
         if: ${{ matrix.job.postgres-version }}
         timeout-minutes: 2
         run: until pg_isready -h localhost; do sleep 1; done
-      - run: |
-          (
-            while true; do
-              echo "......."
-              date
-              df -h | grep root
-              free -m
-              sleep 10
-            done
-          ) &
-          MONITOR_PID=$!
-
-          poetry run trial --jobs=6 tests
-          STATUS=$?
-
-          kill $MONITOR_PID
-          exit $STATUS
-
+      - run: poetry run trial --jobs=6 tests
         env:
           SYNAPSE_POSTGRES: ${{ matrix.job.database == 'postgres' || '' }}
           SYNAPSE_POSTGRES_HOST: /var/run/postgresql
@@ -471,10 +453,10 @@ jobs:
       - changes
     runs-on: ubuntu-22.04
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -536,7 +518,7 @@ jobs:
         extras: ["all"]
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - 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
@@ -586,12 +568,12 @@ jobs:
         job: ${{ fromJson(needs.calculate-test-jobs.outputs.sytest_test_matrix) }}
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - name: Prepare test blacklist
         run: cat sytest-blacklist .ci/worker-blacklist > synapse-blacklist-with-workers
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -633,7 +615,7 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - 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:
@@ -677,7 +659,7 @@ jobs:
           --health-retries 5
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - 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
@@ -732,12 +714,12 @@ jobs:
 
     steps:
       - name: Checkout synapse codebase
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: synapse
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -768,10 +750,10 @@ jobs:
       - changes
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -788,10 +770,10 @@ jobs:
       - changes
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
             toolchain: nightly-2022-12-01
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0

.github/workflows/triage_labelled.yml

@@ -11,7 +11,7 @@ jobs:
     if: >
       contains(github.event.issue.labels.*.name, 'X-Needs-Info')
     steps:
-      - uses: actions/add-to-project@5b1a254a3546aef88e0a7724a77a623fa2e47c36 # main (v1.0.2 + 10 commits)
+      - uses: actions/add-to-project@4515659e2b458b27365e167605ac44f219494b66 # v1.0.2
         id: add_project
         with:
           project-url: "https://github.com/orgs/matrix-org/projects/67"

.github/workflows/twisted_trunk.yml

@@ -43,10 +43,10 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -70,11 +70,11 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - run: sudo apt-get -qq install xmlsec1
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -117,10 +117,10 @@ jobs:
         - ${{ github.workspace }}:/src
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
 
       - name: Install Rust
-        uses: dtolnay/rust-toolchain@b3b07ba8b418998c39fb20f53e8b695cdcc8de1b # master
+        uses: dtolnay/rust-toolchain@e97e2d8cc328f1b50210efc529dca0028893a2d9 # master
         with:
           toolchain: ${{ env.RUST_VERSION }}
       - uses: Swatinem/rust-cache@98c8021b550208e191a6a3145459bfc9fb29c4c0 # v2.8.0
@@ -175,7 +175,7 @@ jobs:
 
     steps:
       - name: Run actions/checkout@v4 for synapse
-        uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
         with:
           path: synapse
 
@@ -217,7 +217,7 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
       - uses: JasonEtco/create-an-issue@1b14a70e4d8dc185e5cc76d3bec9eab20257b2c5 # v2.9.2
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

CHANGES.md

@@ -1,3 +1,194 @@
+# Synapse 1.138.0rc1 (2025-09-02)
+
+### Features
+
+- Support for the stable endpoint and scopes of [MSC3861](https://github.com/matrix-org/matrix-spec-proposals/pull/3861) & co. ([\#18549](https://github.com/element-hq/synapse/issues/18549))
+
+### Bugfixes
+
+- Improve database performance of [MSC4293](https://github.com/matrix-org/matrix-spec-proposals/pull/4293) - Redact on Kick/Ban. ([\#18851](https://github.com/element-hq/synapse/issues/18851))
+- Do not throw an error when fetching a rejected delayed state event on startup. ([\#18858](https://github.com/element-hq/synapse/issues/18858))
+
+### Improved Documentation
+
+- Fix worker documentation incorrectly indicating all room Admin API requests were capable of being handled by workers. ([\#18853](https://github.com/element-hq/synapse/issues/18853))
+
+### Internal Changes
+
+- Instrument `_ByteProducer` with tracing to measure potential dead time while writing bytes to the request. ([\#18804](https://github.com/element-hq/synapse/issues/18804))
+- Switch to OpenTracing's `ContextVarsScopeManager` instead of our own custom `LogContextScopeManager`. ([\#18849](https://github.com/element-hq/synapse/issues/18849))
+- Trace how much work is being done while "recursively fetching redactions". ([\#18854](https://github.com/element-hq/synapse/issues/18854))
+- Link [upstream Twisted bug](https://github.com/twisted/twisted/issues/12498) tracking the problem that explains why we have to use a `Producer` to write bytes to the request. ([\#18855](https://github.com/element-hq/synapse/issues/18855))
+- Introduce `EventPersistencePair` type. ([\#18857](https://github.com/element-hq/synapse/issues/18857))
+
+
+
+### Updates to locked dependencies
+
+* Bump actions/add-to-project from c0c5949b017d0d4a39f7ba888255881bdac2a823 to 4515659e2b458b27365e167605ac44f219494b66. ([\#18863](https://github.com/element-hq/synapse/issues/18863))
+* Bump actions/checkout from 4.3.0 to 5.0.0. ([\#18834](https://github.com/element-hq/synapse/issues/18834))
+* Bump anyhow from 1.0.98 to 1.0.99. ([\#18841](https://github.com/element-hq/synapse/issues/18841))
+* Bump docker/login-action from 3.4.0 to 3.5.0. ([\#18835](https://github.com/element-hq/synapse/issues/18835))
+* Bump dtolnay/rust-toolchain from b3b07ba8b418998c39fb20f53e8b695cdcc8de1b to e97e2d8cc328f1b50210efc529dca0028893a2d9. ([\#18862](https://github.com/element-hq/synapse/issues/18862))
+* Bump phonenumbers from 9.0.11 to 9.0.12. ([\#18837](https://github.com/element-hq/synapse/issues/18837))
+* Bump regex from 1.11.1 to 1.11.2. ([\#18864](https://github.com/element-hq/synapse/issues/18864))
+* Bump reqwest from 0.12.22 to 0.12.23. ([\#18842](https://github.com/element-hq/synapse/issues/18842))
+* Bump ruff from 0.12.7 to 0.12.10. ([\#18865](https://github.com/element-hq/synapse/issues/18865))
+* Bump serde_json from 1.0.142 to 1.0.143. ([\#18866](https://github.com/element-hq/synapse/issues/18866))
+* Bump types-bleach from 6.2.0.20250514 to 6.2.0.20250809. ([\#18838](https://github.com/element-hq/synapse/issues/18838))
+* Bump types-jsonschema from 4.25.0.20250720 to 4.25.1.20250822. ([\#18867](https://github.com/element-hq/synapse/issues/18867))
+* Bump types-psycopg2 from 2.9.21.20250718 to 2.9.21.20250809. ([\#18836](https://github.com/element-hq/synapse/issues/18836))
+
+# Synapse 1.137.0 (2025-08-26)
+
+No significant changes since 1.137.0rc1.
+
+
+
+
+# Synapse 1.137.0rc1 (2025-08-19)
+
+### Bugfixes
+
+- Fix a bug which could corrupt auth chains making it impossible to perform state resolution. ([\#18746](https://github.com/element-hq/synapse/issues/18746))
+- Fix error message in `register_new_matrix_user` utility script for empty `registration_shared_secret`. ([\#18780](https://github.com/element-hq/synapse/issues/18780))
+- Allow enabling [MSC4108](https://github.com/matrix-org/matrix-spec-proposals/pull/4108) when the stable Matrix Authentication Service integration is enabled. ([\#18832](https://github.com/element-hq/synapse/issues/18832))
+
+### Improved Documentation
+
+- Include IPv6 networks in `denied-peer-ips` of coturn setup. Contributed by @litetex. ([\#18781](https://github.com/element-hq/synapse/issues/18781))
+
+### Internal Changes
+
+- Update tests to ensure all database tables are emptied when purging a room. ([\#18794](https://github.com/element-hq/synapse/issues/18794))
+- Instrument the `encode_response` part of Sliding Sync requests for more complete traces in Jaeger. ([\#18815](https://github.com/element-hq/synapse/issues/18815))
+- Tag Sliding Sync traces when we `wait_for_events`. ([\#18816](https://github.com/element-hq/synapse/issues/18816))
+- Fix `portdb` CI by hardcoding the new `pg_dump` restrict key that was added due to [CVE-2025-8714](https://nvd.nist.gov/vuln/detail/cve-2025-8714). ([\#18824](https://github.com/element-hq/synapse/issues/18824))
+
+
+
+### Updates to locked dependencies
+
+* Bump actions/add-to-project from 5b1a254a3546aef88e0a7724a77a623fa2e47c36 to 0c37450c4be3b6a7582b2fb013c9ebfd9c8e9300. ([\#18557](https://github.com/element-hq/synapse/issues/18557))
+* Bump actions/cache from 4.2.3 to 4.2.4. ([\#18799](https://github.com/element-hq/synapse/issues/18799))
+* Bump actions/checkout from 4.2.2 to 4.3.0. ([\#18800](https://github.com/element-hq/synapse/issues/18800))
+* Bump actions/download-artifact from 4.3.0 to 5.0.0. ([\#18801](https://github.com/element-hq/synapse/issues/18801))
+* Bump docker/metadata-action from 5.7.0 to 5.8.0. ([\#18773](https://github.com/element-hq/synapse/issues/18773))
+* Bump mypy from 1.16.1 to 1.17.1. ([\#18775](https://github.com/element-hq/synapse/issues/18775))
+* Bump phonenumbers from 9.0.10 to 9.0.11. ([\#18797](https://github.com/element-hq/synapse/issues/18797))
+* Bump pygithub from 2.6.1 to 2.7.0. ([\#18779](https://github.com/element-hq/synapse/issues/18779))
+* Bump serde_json from 1.0.141 to 1.0.142. ([\#18776](https://github.com/element-hq/synapse/issues/18776))
+* Bump slab from 0.4.10 to 0.4.11. ([\#18809](https://github.com/element-hq/synapse/issues/18809))
+* Bump tokio from 1.47.0 to 1.47.1. ([\#18774](https://github.com/element-hq/synapse/issues/18774))
+* Bump types-pyyaml from 6.0.12.20250516 to 6.0.12.20250809. ([\#18798](https://github.com/element-hq/synapse/issues/18798))
+* Bump types-setuptools from 80.9.0.20250529 to 80.9.0.20250809. ([\#18796](https://github.com/element-hq/synapse/issues/18796))
+
+# Synapse 1.136.0 (2025-08-12)
+
+Note: This release includes the security fixes from `1.135.2` and `1.136.0rc2`, detailed below.
+
+### Bugfixes
+
+- Fix bug introduced in 1.135.2 and 1.136.0rc2 where the [Make Room Admin API](https://element-hq.github.io/synapse/latest/admin_api/rooms.html#make-room-admin-api) would not treat a room v12's creator power level as the highest in room. ([\#18805](https://github.com/element-hq/synapse/issues/18805))
+
+
+# Synapse 1.135.2 (2025-08-11)
+
+This is the Synapse portion of the [Matrix coordinated security release](https://matrix.org/blog/2025/07/security-predisclosure/). This release includes support for [room version](https://spec.matrix.org/v1.15/rooms/) 12 which fixes a number of security vulnerabilities, including [CVE-2025-49090](https://www.cve.org/CVERecord?id=CVE-2025-49090).
+
+The default room version is not changed. Not all clients will support room version 12 immediately, and not all users will be using the latest version of their clients. Large, public rooms are advised to wait a few weeks before upgrading to room version 12 to allow users throughout the Matrix ecosystem to update their clients.
+
+Note: release 1.135.1 was skipped due to issues discovered during the release process.
+
+Two patched Synapse releases are now available:
+
+* `1.135.2`: stable release comprised of `1.135.0` + security patches
+    * Upgrade to this release **if you are currently running 1.135.0 or below**.
+* `1.136.0rc2`: unstable release candidate comprised of `1.136.0rc1` + security patches.
+    * Upgrade to this release **only if you are on 1.136.0rc1**.
+
+### Bugfixes
+
+- Fix invalidation of storage cache that was broken in 1.135.0. ([\#18786](https://github.com/element-hq/synapse/issues/18786))
+
+### Internal Changes
+
+- Add a parameter to `upgrade_rooms(..)` to allow auto join local users. ([\#82](https://github.com/element-hq/synapse/issues/82))
+- Speed up upgrading a room with large numbers of banned users. ([\#18574](https://github.com/element-hq/synapse/issues/18574))
+
+
+# Synapse 1.136.0rc2 (2025-08-11)
+
+- Update MSC4293 redaction logic for room v12. ([\#80](https://github.com/element-hq/synapse/issues/80))
+
+### Internal Changes
+
+- Add a parameter to `upgrade_rooms(..)` to allow auto join local users. ([\#83](https://github.com/element-hq/synapse/issues/83))
+
+
+# Synapse 1.136.0rc1 (2025-08-05)
+
+Please check [the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/develop/docs/upgrade.md#upgrading-to-v11360) as this release contains changes to MAS support, metrics labels and the module API which may require your attention when upgrading.
+
+### Features
+
+- Add configurable rate limiting for the creation of rooms. ([\#18514](https://github.com/element-hq/synapse/issues/18514))
+- Add support for [MSC4293](https://github.com/matrix-org/matrix-spec-proposals/pull/4293) - Redact on Kick/Ban. ([\#18540](https://github.com/element-hq/synapse/issues/18540))
+- When admins enable themselves to see soft-failed events, they will also see if the cause is due to the policy server flagging them as spam via `unsigned`. ([\#18585](https://github.com/element-hq/synapse/issues/18585))
+- Add ability to configure forward/outbound proxy via homeserver config instead of environment variables. See `http_proxy`, `https_proxy`, `no_proxy_hosts`. ([\#18686](https://github.com/element-hq/synapse/issues/18686))
+- Advertise experimental support for [MSC4306](https://github.com/matrix-org/matrix-spec-proposals/pull/4306) (Thread Subscriptions) through `/_matrix/clients/versions` if enabled. ([\#18722](https://github.com/element-hq/synapse/issues/18722))
+- Stabilise support for delegating authentication to [Matrix Authentication Service](https://github.com/element-hq/matrix-authentication-service/). ([\#18759](https://github.com/element-hq/synapse/issues/18759))
+- Implement the push rules for experimental [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-doc/issues/4306). ([\#18762](https://github.com/element-hq/synapse/issues/18762))
+
+### Bugfixes
+
+- Allow return code 403 (allowed by C2S Spec since v1.2) when fetching profiles via federation. ([\#18696](https://github.com/element-hq/synapse/issues/18696))
+- Register the MSC4306 (Thread Subscriptions) endpoints in the CS API when the experimental feature is enabled. ([\#18726](https://github.com/element-hq/synapse/issues/18726))
+- Fix a long-standing bug where suspended users could not have server notices sent to them (a 403 was returned to the admin). ([\#18750](https://github.com/element-hq/synapse/issues/18750))
+- Fix an issue that could cause logcontexts to be lost on rate-limited requests. Found by @realtyem. ([\#18763](https://github.com/element-hq/synapse/issues/18763))
+- Fix invalidation of storage cache that was broken in 1.135.0. ([\#18786](https://github.com/element-hq/synapse/issues/18786))
+
+### Improved Documentation
+
+- Minor improvements to README. ([\#18700](https://github.com/element-hq/synapse/issues/18700))
+- Document that there can be multiple workers handling the `receipts` stream. ([\#18760](https://github.com/element-hq/synapse/issues/18760))
+- Improve worker documentation for some device paths. ([\#18761](https://github.com/element-hq/synapse/issues/18761))
+
+### Deprecations and Removals
+
+- Deprecate `run_as_background_process` exported as part of the module API interface in favor of `ModuleApi.run_as_background_process`. See [the relevant section in the upgrade notes](https://github.com/element-hq/synapse/blob/develop/docs/upgrade.md#upgrading-to-v11360) for more information. ([\#18737](https://github.com/element-hq/synapse/issues/18737))
+
+### Internal Changes
+
+- Add debug logging for HMAC digest verification failures when using the admin API to register users. ([\#18474](https://github.com/element-hq/synapse/issues/18474))
+- Speed up upgrading a room with large numbers of banned users. ([\#18574](https://github.com/element-hq/synapse/issues/18574))
+- Fix config documentation generation script on Windows by enforcing UTF-8. ([\#18580](https://github.com/element-hq/synapse/issues/18580))
+- Refactor cache, background process, `Counter`, `LaterGauge`, `GaugeBucketCollector`, `Histogram`, and `Gauge` metrics to be homeserver-scoped. ([\#18656](https://github.com/element-hq/synapse/issues/18656), [\#18714](https://github.com/element-hq/synapse/issues/18714), [\#18715](https://github.com/element-hq/synapse/issues/18715), [\#18724](https://github.com/element-hq/synapse/issues/18724), [\#18753](https://github.com/element-hq/synapse/issues/18753), [\#18725](https://github.com/element-hq/synapse/issues/18725), [\#18670](https://github.com/element-hq/synapse/issues/18670), [\#18748](https://github.com/element-hq/synapse/issues/18748), [\#18751](https://github.com/element-hq/synapse/issues/18751))
+- Reduce database usage in Sliding Sync by not querying for background update completion after the update is known to be complete. ([\#18718](https://github.com/element-hq/synapse/issues/18718))
+- Improve order of validation and ratelimiting in room creation. ([\#18723](https://github.com/element-hq/synapse/issues/18723))
+- Bump minimum version bound on Twisted to 21.2.0. ([\#18727](https://github.com/element-hq/synapse/issues/18727), [\#18729](https://github.com/element-hq/synapse/issues/18729))
+- Use `twisted.internet.testing` module in tests instead of deprecated `twisted.test.proto_helpers`. ([\#18728](https://github.com/element-hq/synapse/issues/18728))
+- Remove obsolete `/send_event` replication endpoint. ([\#18730](https://github.com/element-hq/synapse/issues/18730))
+- Update metrics linting to be able to handle custom metrics. ([\#18733](https://github.com/element-hq/synapse/issues/18733))
+- Work around `twisted.protocols.amp.TooLong` error by reducing logging in some tests. ([\#18736](https://github.com/element-hq/synapse/issues/18736))
+- Prevent "Move labelled issues to correct projects" GitHub Actions workflow from failing when an issue is already on the project board. ([\#18755](https://github.com/element-hq/synapse/issues/18755))
+- Bump minimum supported Rust version (MSRV) to 1.82.0. Missed in [#18553](https://github.com/element-hq/synapse/pull/18553) (released in Synapse 1.134.0). ([\#18757](https://github.com/element-hq/synapse/issues/18757))
+- Make `Clock.sleep(...)` return a coroutine, so that mypy can catch places where we don't await on it. ([\#18772](https://github.com/element-hq/synapse/issues/18772))
+- Update implementation of [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-doc/issues/4306) to include automatic subscription conflict prevention as introduced in later drafts. ([\#18756](https://github.com/element-hq/synapse/issues/18756))
+
+
+
+### Updates to locked dependencies
+
+* Bump gitpython from 3.1.44 to 3.1.45. ([\#18743](https://github.com/element-hq/synapse/issues/18743))
+* Bump mypy-zope from 1.0.12 to 1.0.13. ([\#18744](https://github.com/element-hq/synapse/issues/18744))
+* Bump phonenumbers from 9.0.9 to 9.0.10. ([\#18741](https://github.com/element-hq/synapse/issues/18741))
+* Bump ruff from 0.12.4 to 0.12.5. ([\#18742](https://github.com/element-hq/synapse/issues/18742))
+* Bump sentry-sdk from 2.32.0 to 2.33.2. ([\#18745](https://github.com/element-hq/synapse/issues/18745))
+* Bump tokio from 1.46.1 to 1.47.0. ([\#18740](https://github.com/element-hq/synapse/issues/18740))
+* Bump types-jsonschema from 4.24.0.20250708 to 4.25.0.20250720. ([\#18703](https://github.com/element-hq/synapse/issues/18703))
+* Bump types-psycopg2 from 2.9.21.20250516 to 2.9.21.20250718. ([\#18706](https://github.com/element-hq/synapse/issues/18706))
+
 # Synapse 1.135.0 (2025-08-01)
 
 No significant changes since 1.135.0rc2.

Cargo.lock

@@ -28,9 +28,9 @@ dependencies = [
 
 [[package]]
 name = "anyhow"
-version = "1.0.98"
+version = "1.0.99"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "e16d2d3311acee920a9eb8d33b8cbc1787ce4a264e85f964c2404b969bdcd487"
+checksum = "b0674a1ddeecb70197781e945de4b3b8ffb61fa939a5597bcf48503737663100"
 
 [[package]]
 name = "arc-swap"
@@ -1062,9 +1062,9 @@ dependencies = [
 
 [[package]]
 name = "regex"
-version = "1.11.1"
+version = "1.11.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "b544ef1b4eac5dc2db33ea63606ae9ffcfac26c1416a2806ae0bf5f56b201191"
+checksum = "23d7fd106d8c02486a8d64e778353d1cffe08ce79ac2e82f540c86d0facf6912"
 dependencies = [
  "aho-corasick",
  "memchr",
@@ -1091,9 +1091,9 @@ checksum = "2b15c43186be67a4fd63bee50d0303afffcef381492ebe2c5d87f324e1b8815c"
 
 [[package]]
 name = "reqwest"
-version = "0.12.22"
+version = "0.12.23"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "cbc931937e6ca3a06e3b6c0aa7841849b160a90351d6ab467a8b9b9959767531"
+checksum = "d429f34c8092b2d42c7c93cec323bb4adeb7c67698f70839adec842ec10c7ceb"
 dependencies = [
  "base64",
  "bytes",
@@ -1270,9 +1270,9 @@ dependencies = [
 
 [[package]]
 name = "serde_json"
-version = "1.0.141"
+version = "1.0.143"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "30b9eff21ebe718216c6ec64e1d9ac57087aad11efc64e32002bce4a0d4c03d3"
+checksum = "d401abef1d108fbd9cbaebc3e46611f4b1021f714a0597a71f41ee463f5f4a5a"
 dependencies = [
  "itoa",
  "memchr",
@@ -1322,9 +1322,9 @@ checksum = "0fda2ff0d084019ba4d7c6f371c95d8fd75ce3524c3cb8fb653a3023f6323e64"
 
 [[package]]
 name = "slab"
-version = "0.4.10"
+version = "0.4.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "04dc19736151f35336d325007ac991178d504a119863a2fcb3758cdb5e52c50d"
+checksum = "7a2ae44ef20feb57a68b23d846850f861394c2e02dc425a50098ae8c90267589"
 
 [[package]]
 name = "smallvec"
@@ -1478,9 +1478,9 @@ checksum = "1f3ccbac311fea05f86f61904b462b55fb3df8837a366dfc601a0161d0532f20"
 
 [[package]]
 name = "tokio"
-version = "1.47.0"
+version = "1.47.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "43864ed400b6043a4757a25c7a64a8efde741aed79a056a2fb348a406701bb35"
+checksum = "89e49afdadebb872d3145a5638b59eb0691ea23e46ca484037cfab3b76b95038"
 dependencies = [
  "backtrace",
  "bytes",

changelog.d/18474.misc

@@ -1 +0,0 @@
-Add debug logging for HMAC digest verification failures when using the admin API to register users.

changelog.d/18514.feature

@@ -1 +0,0 @@
-Add configurable rate limiting for the creation of rooms.

changelog.d/18540.feature

@@ -1 +0,0 @@
-Add support for [MSC4293](https://github.com/matrix-org/matrix-spec-proposals/pull/4293) - Redact on Kick/Ban.

changelog.d/18574.misc

@@ -1 +0,0 @@
-Speed up upgrading a room with large numbers of banned users.

changelog.d/18580.misc

@@ -1 +0,0 @@
-Fix config documentation generation script on Windows by enforcing UTF-8.

changelog.d/18585.feature

@@ -1 +0,0 @@
-When admins enable themselves to see soft-failed events, they will also see if the cause is due to the policy server flagging them as spam via `unsigned`.

changelog.d/18656.misc

@@ -1 +0,0 @@
-Refactor `Counter` metrics to be homeserver-scoped.

changelog.d/18670.misc

@@ -1 +0,0 @@
-Refactor background process metrics to be homeserver-scoped.

changelog.d/18686.feature

@@ -1 +0,0 @@
-Add ability to configure forward/outbound proxy via homeserver config instead of environment variables. See `http_proxy`, `https_proxy`, `no_proxy_hosts`.

changelog.d/18696.bugfix

@@ -1 +0,0 @@
-Allow return code 403 (allowed by C2S Spec since v1.2) when fetching profiles via federation.

changelog.d/18700.doc

@@ -1 +0,0 @@
-Minor improvements to README.

changelog.d/18714.misc

@@ -1 +0,0 @@
-Refactor `LaterGauge` metrics to be homeserver-scoped.

changelog.d/18715.misc

@@ -1 +0,0 @@
-Refactor `GaugeBucketCollector` metrics to be homeserver-scoped.

changelog.d/18718.misc

@@ -1 +0,0 @@
-Reduce database usage in Sliding Sync by not querying for background update completion after the update is known to be complete.

changelog.d/18722.feature

@@ -1 +0,0 @@
-Advertise experimental support for [MSC4306](https://github.com/matrix-org/matrix-spec-proposals/pull/4306) through `/_matrix/clients/versions` if enabled.

changelog.d/18723.misc

@@ -1 +0,0 @@
-Improve order of validation and ratelimiting in room creation.

changelog.d/18724.misc

@@ -1 +0,0 @@
-Refactor `Histogram` metrics to be homeserver-scoped.

changelog.d/18725.misc

@@ -1 +0,0 @@
-Refactor `Gauge` metrics to be homeserver-scoped.

changelog.d/18726.bugfix

@@ -1 +0,0 @@
-Register the MSC4306 endpoints in the CS API when the experimental feature is enabled.

changelog.d/18727.misc

@@ -1 +0,0 @@
-Bump minimum version bound on Twisted to 21.2.0.

changelog.d/18728.misc

@@ -1 +0,0 @@
-Use `twisted.internet.testing` module in tests instead of deprecated `twisted.test.proto_helpers`.

changelog.d/18729.misc

@@ -1 +0,0 @@
-Bump minimum version bound on Twisted to 21.2.0.

changelog.d/18730.misc

@@ -1 +0,0 @@
-Remove obsolete `/send_event` replication endpoint.

changelog.d/18733.misc

@@ -1 +0,0 @@
-Update metrics linting to be able to handle custom metrics.

changelog.d/18736.misc

@@ -1 +0,0 @@
-Work around `twisted.protocols.amp.TooLong` error by reducing logging in some tests.

changelog.d/18737.removal

@@ -1 +0,0 @@
-Deprecate `run_as_background_process` exported as part of the module API interface in favor of `ModuleApi.run_as_background_process`. See the relevant section in the upgrade notes for more information.

changelog.d/18748.misc

@@ -1 +0,0 @@
-Refactor cache metrics to be homeserver-scoped.

changelog.d/18750.bugfix

@@ -1 +0,0 @@
-Fix a long-standing bug where suspended users could not have server notices sent to them (a 403 was returned to the admin).

changelog.d/18753.misc

@@ -1 +0,0 @@
-Refactor `Histogram` metrics to be homeserver-scoped.

changelog.d/18755.misc

@@ -1 +0,0 @@
-Prevent "Move labelled issues to correct projects" GitHub Actions workflow from failing when an issue is already on the project board.

changelog.d/18756.misc

@@ -1 +0,0 @@
-Update implementation of [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-doc/issues/4306) to include automatic subscription conflict prevention as introduced in later drafts.

changelog.d/18757.misc

@@ -1 +0,0 @@
-Bump minimum supported Rust version (MSRV) to 1.82.0. Missed in [#18553](https://github.com/element-hq/synapse/pull/18553) (released in Synapse 1.134.0).

changelog.d/18759.feature

@@ -1 +0,0 @@
-Stable support for delegating authentication to [Matrix Authentication Service](https://github.com/element-hq/matrix-authentication-service/).

changelog.d/18760.doc.md

@@ -1 +0,0 @@
-Document that there can be multiple workers handling the `receipts` stream.

changelog.d/18761.doc.md

@@ -1 +0,0 @@
-Improve worker documentation for some device paths.

changelog.d/18762.feature

@@ -1 +0,0 @@
-Implement the push rules for experimental [MSC4306: Thread Subscriptions](https://github.com/matrix-org/matrix-doc/issues/4306).

changelog.d/18763.bugfix

@@ -1 +0,0 @@
-Fix an issue that could cause logcontexts to be lost on rate-limited requests. Found by @realtyem.

changelog.d/18772.misc

@@ -1 +0,0 @@
-Make `Clock.sleep(..)` return a coroutine, so that mypy can catch places where we don't await on it.

changelog.d/18787.misc

@@ -1 +0,0 @@
-CI debugging.

changelog.d/18791.misc

@@ -0,0 +1 @@
+Fix `LaterGauge` metrics to collect from all servers.

changelog.d/18878.docker

@@ -0,0 +1 @@
+Suppress "Applying schema" log noise bulk when `SYNAPSE_LOG_TESTING` is set.

debian/changelog

@@ -1,3 +1,51 @@
+matrix-synapse-py3 (1.138.0~rc1) stable; urgency=medium
+
+  * New synapse release 1.138.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 02 Sep 2025 12:16:14 +0000
+
+matrix-synapse-py3 (1.137.0) stable; urgency=medium
+
+  * New Synapse release 1.137.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 26 Aug 2025 10:23:41 +0100
+
+matrix-synapse-py3 (1.137.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.137.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 19 Aug 2025 10:55:22 +0100
+
+matrix-synapse-py3 (1.136.0) stable; urgency=medium
+
+  * New Synapse release 1.136.0.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 12 Aug 2025 13:18:03 +0100
+
+matrix-synapse-py3 (1.136.0~rc2) stable; urgency=medium
+
+  * New Synapse release 1.136.0rc2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Mon, 11 Aug 2025 12:18:52 -0600
+
+matrix-synapse-py3 (1.136.0~rc1) stable; urgency=medium
+
+  * New Synapse release 1.136.0rc1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Tue, 05 Aug 2025 08:13:30 -0600
+
+matrix-synapse-py3 (1.135.2) stable; urgency=medium
+
+  * New Synapse release 1.135.2.
+
+ -- Synapse Packaging team <packages@matrix.org>  Mon, 11 Aug 2025 11:52:01 -0600
+
+matrix-synapse-py3 (1.135.1) stable; urgency=medium
+
+  * New Synapse release 1.135.1.
+
+ -- Synapse Packaging team <packages@matrix.org>  Mon, 11 Aug 2025 11:13:15 -0600
+
 matrix-synapse-py3 (1.135.0) stable; urgency=medium
 
   * New Synapse release 1.135.0.

docker/conf/log.config

@@ -77,6 +77,13 @@ loggers:
     #}
     synapse.visibility.filtered_event_debug:
         level: DEBUG
+
+    {#
+      If Synapse is under test, we don't care about seeing the "Applying schema" log
+      lines at the INFO level every time we run the tests (it's 100 lines of bulk)
+    #}
+    synapse.storage.prepare_database:
+      level: WARN
     {% endif %}
 
 root:

docs/setup/turn/coturn.md

@@ -88,7 +88,8 @@ This will install and start a systemd service called `coturn`.
     denied-peer-ip=172.16.0.0-172.31.255.255
 
     # recommended additional local peers to block, to mitigate external access to internal services.
-    # https://www.rtcsec.com/article/slack-webrtc-turn-compromise-and-bug-bounty/#how-to-fix-an-open-turn-relay-to-address-this-vulnerability
+    # https://www.enablesecurity.com/blog/slack-webrtc-turn-compromise-and-bug-bounty/#how-to-fix-an-open-turn-relay-to-address-this-vulnerability
+    # https://www.enablesecurity.com/blog/cve-2020-26262-bypass-of-coturns-access-control-protection/#further-concerns-what-else
     no-multicast-peers
     denied-peer-ip=0.0.0.0-0.255.255.255
     denied-peer-ip=100.64.0.0-100.127.255.255
@@ -101,6 +102,14 @@ This will install and start a systemd service called `coturn`.
     denied-peer-ip=198.51.100.0-198.51.100.255
     denied-peer-ip=203.0.113.0-203.0.113.255
     denied-peer-ip=240.0.0.0-255.255.255.255
+    denied-peer-ip=::1
+    denied-peer-ip=64:ff9b::-64:ff9b::ffff:ffff
+    denied-peer-ip=::ffff:0.0.0.0-::ffff:255.255.255.255
+    denied-peer-ip=100::-100::ffff:ffff:ffff:ffff
+    denied-peer-ip=2001::-2001:1ff:ffff:ffff:ffff:ffff:ffff:ffff
+    denied-peer-ip=2002::-2002:ffff:ffff:ffff:ffff:ffff:ffff:ffff
+    denied-peer-ip=fc00::-fdff:ffff:ffff:ffff:ffff:ffff:ffff:ffff
+    denied-peer-ip=fe80::-febf:ffff:ffff:ffff:ffff:ffff:ffff:ffff
 
     # special case the turn server itself so that client->TURN->TURN->client flows work
     # this should be one of the turn server's listening IPs

docs/usage/configuration/config_documentation.md

@@ -4174,7 +4174,7 @@ The default power levels for each preset are:
 "m.room.history_visibility": 100
 "m.room.canonical_alias": 50
 "m.room.avatar": 50
-"m.room.tombstone": 100
+"m.room.tombstone": 100 (150 if MSC4289 is used)
 "m.room.server_acl": 100
 "m.room.encryption": 100
 ```

docs/workers.md

@@ -252,7 +252,7 @@ information.
     ^/_matrix/client/(api/v1|r0|v3|unstable)/directory/room/.*$
     ^/_matrix/client/(r0|v3|unstable)/capabilities$
     ^/_matrix/client/(r0|v3|unstable)/notifications$
-    ^/_synapse/admin/v1/rooms/
+    ^/_synapse/admin/v1/rooms/[^/]+$
 
     # Encryption requests
     ^/_matrix/client/(r0|v3|unstable)/keys/query$

poetry.lock

@@ -441,24 +441,6 @@ files = [
     {file = "defusedxml-0.7.1.tar.gz", hash = "sha256:1bb3032db185915b62d7c6209c5a8792be6a32ab2fedacc84e01b52c51aa3e69"},
 ]
 
-[[package]]
-name = "deprecated"
-version = "1.2.13"
-description = "Python @deprecated decorator to deprecate old python classes, functions or methods."
-optional = false
-python-versions = ">=2.7, !=3.0.*, !=3.1.*, !=3.2.*, !=3.3.*"
-groups = ["dev"]
-files = [
-    {file = "Deprecated-1.2.13-py2.py3-none-any.whl", hash = "sha256:64756e3e14c8c5eea9795d93c524551432a0be75629f8f29e67ab8caf076c76d"},
-    {file = "Deprecated-1.2.13.tar.gz", hash = "sha256:43ac5335da90c31c24ba028af536a91d41d53f9e6901ddb021bcc572ce44e38d"},
-]
-
-[package.dependencies]
-wrapt = ">=1.10,<2"
-
-[package.extras]
-dev = ["PyTest (<5) ; python_version < \"3.6\"", "PyTest ; python_version >= \"3.6\"", "PyTest-Cov (<2.6) ; python_version < \"3.6\"", "PyTest-Cov ; python_version >= \"3.6\"", "bump2version (<1)", "configparser (<5) ; python_version < \"3\"", "importlib-metadata (<3) ; python_version < \"3\"", "importlib-resources (<4) ; python_version < \"3\"", "sphinx (<2)", "sphinxcontrib-websupport (<2) ; python_version < \"3\"", "tox", "zipp (<2) ; python_version < \"3\""]
-
 [[package]]
 name = "docutils"
 version = "0.19"
@@ -1387,44 +1369,50 @@ docs = ["sphinx (>=8,<9)", "sphinx-autobuild"]
 
 [[package]]
 name = "mypy"
-version = "1.16.1"
+version = "1.17.1"
 description = "Optional static typing for Python"
 optional = false
 python-versions = ">=3.9"
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 files = [
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 [[package]]
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 [[package]]
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-]
-
 [[package]]
 name = "xmlschema"
 version = "2.4.0"
@@ -3353,4 +3256,4 @@ url-preview = ["lxml"]
 [metadata]
 lock-version = "2.1"
 python-versions = "^3.9.0"
-content-hash = "600a349d08dde732df251583094a121b5385eb43ae0c6ceff10dcf9749359446"
+content-hash = "2e8ea085e1a0c6f0ac051d4bc457a96827d01f621b1827086de01a5ffa98cf79"

pyproject.toml

@@ -101,7 +101,7 @@ module-name = "synapse.synapse_rust"
 
 [tool.poetry]
 name = "matrix-synapse"
-version = "1.135.0"
+version = "1.138.0rc1"
 description = "Homeserver for the Matrix decentralised comms protocol"
 authors = ["Matrix.org Team and Contributors <packages@matrix.org>"]
 license = "AGPL-3.0-or-later"
@@ -324,7 +324,7 @@ all = [
 # 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 = "0.12.7"
+ruff = "0.12.10"
 # Type checking only works with the pydantic.v1 compat module from pydantic v2
 pydantic = "^2"
 

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/v1.135/synapse-config.schema.json
+$id: https://element-hq.github.io/synapse/schema/synapse/v1.138/synapse-config.schema.json
 type: object
 properties:
   modules:
@@ -5184,7 +5184,7 @@ properties:
 
       "m.room.avatar": 50
 
-      "m.room.tombstone": 100
+      "m.room.tombstone": 100 (150 if MSC4289 is used)
 
       "m.room.server_acl": 100
 

synapse/_scripts/generate_workers_map.py

@@ -153,9 +153,13 @@ def get_registered_paths_for_default(
     """
 
     hs = MockHomeserver(base_config, worker_app)
+
     # TODO We only do this to avoid an error, but don't need the database etc
     hs.setup()
-    return get_registered_paths_for_hs(hs)
+    registered_paths = get_registered_paths_for_hs(hs)
+    hs.cleanup()
+
+    return registered_paths
 
 
 def elide_http_methods_if_unconflicting(

synapse/_scripts/register_new_matrix_user.py

@@ -30,6 +30,7 @@ from typing import Any, Callable, Dict, Optional
 
 import requests
 import yaml
+from typing_extensions import Never
 
 _CONFLICTING_SHARED_SECRET_OPTS_ERROR = """\
 Conflicting options 'registration_shared_secret' and 'registration_shared_secret_path'
@@ -40,6 +41,10 @@ _NO_SHARED_SECRET_OPTS_ERROR = """\
 No 'registration_shared_secret' or 'registration_shared_secret_path' defined in config.
 """
 
+_EMPTY_SHARED_SECRET_PATH_OPTS_ERROR = """\
+The secret given via `registration_shared_secret_path` must not be empty.
+"""
+
 _DEFAULT_SERVER_URL = "http://localhost:8008"
 
 
@@ -170,6 +175,12 @@ def register_new_user(
     )
 
 
+def bail(err_msg: str) -> Never:
+    """Prints the given message to stderr and exits."""
+    print(err_msg, file=sys.stderr)
+    sys.exit(1)
+
+
 def main() -> None:
     logging.captureWarnings(True)
 
@@ -262,15 +273,20 @@ def main() -> None:
         assert config is not None
 
         secret = config.get("registration_shared_secret")
+        if not isinstance(secret, (str, type(None))):
+            bail("registration_shared_secret is not a string.")
         secret_file = config.get("registration_shared_secret_path")
-        if secret_file:
-            if secret:
-                print(_CONFLICTING_SHARED_SECRET_OPTS_ERROR, file=sys.stderr)
-                sys.exit(1)
+        if not isinstance(secret_file, (str, type(None))):
+            bail("registration_shared_secret_path is not a string.")
+
+        if not secret and not secret_file:
+            bail(_NO_SHARED_SECRET_OPTS_ERROR)
+        elif secret and secret_file:
+            bail(_CONFLICTING_SHARED_SECRET_OPTS_ERROR)
+        elif not secret and secret_file:
             secret = _read_file(secret_file, "registration_shared_secret_path").strip()
-        if not secret:
-            print(_NO_SHARED_SECRET_OPTS_ERROR, file=sys.stderr)
-            sys.exit(1)
+            if not secret:
+                bail(_EMPTY_SHARED_SECRET_PATH_OPTS_ERROR)
 
     if args.password_file:
         password = _read_file(args.password_file, "password-file").strip()

synapse/_scripts/synapse_port_db.py

@@ -99,6 +99,7 @@ from synapse.storage.engines import create_engine
 from synapse.storage.prepare_database import prepare_database
 from synapse.types import ISynapseReactor
 from synapse.util import SYNAPSE_VERSION, Clock
+from synapse.util.stringutils import random_string
 
 # Cast safety: Twisted does some naughty magic which replaces the
 # twisted.internet.reactor module with a Reactor instance at runtime.
@@ -323,6 +324,7 @@ class MockHomeserver:
         self.config = config
         self.hostname = config.server.server_name
         self.version_string = SYNAPSE_VERSION
+        self.instance_id = random_string(5)
 
     def get_clock(self) -> Clock:
         return self.clock
@@ -330,6 +332,9 @@ class MockHomeserver:
     def get_reactor(self) -> ISynapseReactor:
         return reactor
 
+    def get_instance_id(self) -> str:
+        return self.instance_id
+
     def get_instance_name(self) -> str:
         return "master"
 
@@ -685,7 +690,15 @@ class Porter:
             )
             prepare_database(db_conn, engine, config=self.hs_config)
             # Type safety: ignore that we're using Mock homeservers here.
-            store = Store(DatabasePool(hs, db_config, engine), db_conn, hs)  # type: ignore[arg-type]
+            store = Store(
+                DatabasePool(
+                    hs,  # type: ignore[arg-type]
+                    db_config,
+                    engine,
+                ),
+                db_conn,
+                hs,  # type: ignore[arg-type]
+            )
             db_conn.commit()
 
         return store

synapse/api/auth/internal.py

@@ -296,4 +296,4 @@ class InternalAuth(BaseAuth):
         Returns:
             True if the user is an admin
         """
-        return await self.store.is_server_admin(requester.user)
+        return await self.store.is_server_admin(requester.user.to_string())

synapse/api/auth/mas.py

@@ -13,7 +13,7 @@
 #
 #
 import logging
-from typing import TYPE_CHECKING, Optional
+from typing import TYPE_CHECKING, Optional, Set
 from urllib.parse import urlencode
 
 from synapse._pydantic_compat import (
@@ -57,8 +57,10 @@ logger = logging.getLogger(__name__)
 
 # Scope as defined by MSC2967
 # https://github.com/matrix-org/matrix-spec-proposals/pull/2967
-SCOPE_MATRIX_API = "urn:matrix:org.matrix.msc2967.client:api:*"
-SCOPE_MATRIX_DEVICE_PREFIX = "urn:matrix:org.matrix.msc2967.client:device:"
+UNSTABLE_SCOPE_MATRIX_API = "urn:matrix:org.matrix.msc2967.client:api:*"
+UNSTABLE_SCOPE_MATRIX_DEVICE_PREFIX = "urn:matrix:org.matrix.msc2967.client:device:"
+STABLE_SCOPE_MATRIX_API = "urn:matrix:client:api:*"
+STABLE_SCOPE_MATRIX_DEVICE_PREFIX = "urn:matrix:client:device:"
 
 
 class ServerMetadata(BaseModel):
@@ -334,7 +336,10 @@ class MasDelegatedAuth(BaseAuth):
         scope = introspection_result.get_scope_set()
 
         # Determine type of user based on presence of particular scopes
-        if SCOPE_MATRIX_API not in scope:
+        if (
+            UNSTABLE_SCOPE_MATRIX_API not in scope
+            and STABLE_SCOPE_MATRIX_API not in scope
+        ):
             raise InvalidClientTokenError(
                 "Token doesn't grant access to the Matrix C-S API"
             )
@@ -366,11 +371,12 @@ class MasDelegatedAuth(BaseAuth):
             # We only allow a single device_id in the scope, so we find them all in the
             # scope list, and raise if there are more than one. The OIDC server should be
             # the one enforcing valid scopes, so we raise a 500 if we find an invalid scope.
-            device_ids = [
-                tok[len(SCOPE_MATRIX_DEVICE_PREFIX) :]
-                for tok in scope
-                if tok.startswith(SCOPE_MATRIX_DEVICE_PREFIX)
-            ]
+            device_ids: Set[str] = set()
+            for tok in scope:
+                if tok.startswith(UNSTABLE_SCOPE_MATRIX_DEVICE_PREFIX):
+                    device_ids.add(tok[len(UNSTABLE_SCOPE_MATRIX_DEVICE_PREFIX) :])
+                elif tok.startswith(STABLE_SCOPE_MATRIX_DEVICE_PREFIX):
+                    device_ids.add(tok[len(STABLE_SCOPE_MATRIX_DEVICE_PREFIX) :])
 
             if len(device_ids) > 1:
                 raise AuthError(
@@ -378,7 +384,7 @@ class MasDelegatedAuth(BaseAuth):
                     "Multiple device IDs in scope",
                 )
 
-            device_id = device_ids[0] if device_ids else None
+            device_id = next(iter(device_ids), None)
 
         if device_id is not None:
             # Sanity check the device_id

synapse/api/auth/msc3861_delegated.py

@@ -20,7 +20,7 @@
 #
 import logging
 from dataclasses import dataclass
-from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional
+from typing import TYPE_CHECKING, Any, Callable, Dict, List, Optional, Set
 from urllib.parse import urlencode
 
 from authlib.oauth2 import ClientAuth
@@ -34,7 +34,6 @@ from synapse.api.errors import (
     AuthError,
     HttpResponseException,
     InvalidClientTokenError,
-    OAuthInsufficientScopeError,
     SynapseError,
     UnrecognizedRequestError,
 )
@@ -63,9 +62,10 @@ logger = logging.getLogger(__name__)
 
 # Scope as defined by MSC2967
 # https://github.com/matrix-org/matrix-spec-proposals/pull/2967
-SCOPE_MATRIX_API = "urn:matrix:org.matrix.msc2967.client:api:*"
-SCOPE_MATRIX_GUEST = "urn:matrix:org.matrix.msc2967.client:api:guest"
-SCOPE_MATRIX_DEVICE_PREFIX = "urn:matrix:org.matrix.msc2967.client:device:"
+UNSTABLE_SCOPE_MATRIX_API = "urn:matrix:org.matrix.msc2967.client:api:*"
+UNSTABLE_SCOPE_MATRIX_DEVICE_PREFIX = "urn:matrix:org.matrix.msc2967.client:device:"
+STABLE_SCOPE_MATRIX_API = "urn:matrix:client:api:*"
+STABLE_SCOPE_MATRIX_DEVICE_PREFIX = "urn:matrix:client:device:"
 
 # Scope which allows access to the Synapse admin API
 SCOPE_SYNAPSE_ADMIN = "urn:synapse:admin:*"
@@ -444,9 +444,6 @@ class MSC3861DelegatedAuth(BaseAuth):
         if not self._is_access_token_the_admin_token(access_token):
             await self._record_request(request, requester)
 
-        if not allow_guest and requester.is_guest:
-            raise OAuthInsufficientScopeError([SCOPE_MATRIX_API])
-
         request.requester = requester
 
         return requester
@@ -528,10 +525,11 @@ class MSC3861DelegatedAuth(BaseAuth):
         scope: List[str] = introspection_result.get_scope_list()
 
         # Determine type of user based on presence of particular scopes
-        has_user_scope = SCOPE_MATRIX_API in scope
-        has_guest_scope = SCOPE_MATRIX_GUEST in scope
+        has_user_scope = (
+            UNSTABLE_SCOPE_MATRIX_API in scope or STABLE_SCOPE_MATRIX_API in scope
+        )
 
-        if not has_user_scope and not has_guest_scope:
+        if not has_user_scope:
             raise InvalidClientTokenError("No scope in token granting user rights")
 
         # Match via the sub claim
@@ -579,11 +577,12 @@ class MSC3861DelegatedAuth(BaseAuth):
             # We only allow a single device_id in the scope, so we find them all in the
             # scope list, and raise if there are more than one. The OIDC server should be
             # the one enforcing valid scopes, so we raise a 500 if we find an invalid scope.
-            device_ids = [
-                tok[len(SCOPE_MATRIX_DEVICE_PREFIX) :]
-                for tok in scope
-                if tok.startswith(SCOPE_MATRIX_DEVICE_PREFIX)
-            ]
+            device_ids: Set[str] = set()
+            for tok in scope:
+                if tok.startswith(UNSTABLE_SCOPE_MATRIX_DEVICE_PREFIX):
+                    device_ids.add(tok[len(UNSTABLE_SCOPE_MATRIX_DEVICE_PREFIX) :])
+                elif tok.startswith(STABLE_SCOPE_MATRIX_DEVICE_PREFIX):
+                    device_ids.add(tok[len(STABLE_SCOPE_MATRIX_DEVICE_PREFIX) :])
 
             if len(device_ids) > 1:
                 raise AuthError(
@@ -591,7 +590,7 @@ class MSC3861DelegatedAuth(BaseAuth):
                     "Multiple device IDs in scope",
                 )
 
-            device_id = device_ids[0] if device_ids else None
+            device_id = next(iter(device_ids), None)
 
         if device_id is not None:
             # Sanity check the device_id
@@ -617,5 +616,4 @@ class MSC3861DelegatedAuth(BaseAuth):
             user_id=user_id,
             device_id=device_id,
             scope=scope,
-            is_guest=(has_guest_scope and not has_user_scope),
         )

synapse/api/constants.py

@@ -46,6 +46,9 @@ MAX_USERID_LENGTH = 255
 # Constant value used for the pseudo-thread which is the main timeline.
 MAIN_TIMELINE: Final = "main"
 
+# MAX_INT + 1, so it always trumps any PL in canonical JSON.
+CREATOR_POWER_LEVEL = 2**53
+
 
 class Membership:
     """Represents the membership states of a user in a room."""
@@ -235,6 +238,8 @@ class EventContentFields:
     #
     # This is deprecated in MSC2175.
     ROOM_CREATOR: Final = "creator"
+    # MSC4289
+    ADDITIONAL_CREATORS: Final = "additional_creators"
 
     # The version of the room for `m.room.create` events.
     ROOM_VERSION: Final = "room_version"

synapse/api/room_versions.py

@@ -36,12 +36,14 @@ class EventFormatVersions:
     ROOM_V1_V2 = 1  # $id:server event id format: used for room v1 and v2
     ROOM_V3 = 2  # MSC1659-style $hash event id format: used for room v3
     ROOM_V4_PLUS = 3  # MSC1884-style $hash format: introduced for room v4
+    ROOM_V11_HYDRA_PLUS = 4  # MSC4291 room IDs as hashes: introduced for room HydraV11
 
 
 KNOWN_EVENT_FORMAT_VERSIONS = {
     EventFormatVersions.ROOM_V1_V2,
     EventFormatVersions.ROOM_V3,
     EventFormatVersions.ROOM_V4_PLUS,
+    EventFormatVersions.ROOM_V11_HYDRA_PLUS,
 }
 
 
@@ -50,6 +52,7 @@ class StateResolutionVersions:
 
     V1 = 1  # room v1 state res
     V2 = 2  # MSC1442 state res: room v2 and later
+    V2_1 = 3  # MSC4297 state res
 
 
 class RoomDisposition:
@@ -109,6 +112,10 @@ class RoomVersion:
     msc3931_push_features: Tuple[str, ...]  # values from PushRuleRoomFlag
     # MSC3757: Restricting who can overwrite a state event
     msc3757_enabled: bool
+    # MSC4289: Creator power enabled
+    msc4289_creator_power_enabled: bool
+    # MSC4291: Room IDs as hashes of the create event
+    msc4291_room_ids_as_hashes: bool
 
 
 class RoomVersions:
@@ -131,6 +138,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V2 = RoomVersion(
         "2",
@@ -151,6 +160,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V3 = RoomVersion(
         "3",
@@ -171,6 +182,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V4 = RoomVersion(
         "4",
@@ -191,6 +204,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V5 = RoomVersion(
         "5",
@@ -211,6 +226,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V6 = RoomVersion(
         "6",
@@ -231,6 +248,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V7 = RoomVersion(
         "7",
@@ -251,6 +270,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V8 = RoomVersion(
         "8",
@@ -271,6 +292,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V9 = RoomVersion(
         "9",
@@ -291,6 +314,8 @@ class RoomVersions:
         enforce_int_power_levels=False,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V10 = RoomVersion(
         "10",
@@ -311,6 +336,8 @@ class RoomVersions:
         enforce_int_power_levels=True,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     MSC1767v10 = RoomVersion(
         # MSC1767 (Extensible Events) based on room version "10"
@@ -332,6 +359,8 @@ class RoomVersions:
         enforce_int_power_levels=True,
         msc3931_push_features=(PushRuleRoomFlag.EXTENSIBLE_EVENTS,),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     MSC3757v10 = RoomVersion(
         # MSC3757 (Restricting who can overwrite a state event) based on room version "10"
@@ -353,6 +382,8 @@ class RoomVersions:
         enforce_int_power_levels=True,
         msc3931_push_features=(),
         msc3757_enabled=True,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     V11 = RoomVersion(
         "11",
@@ -373,6 +404,8 @@ class RoomVersions:
         enforce_int_power_levels=True,
         msc3931_push_features=(),
         msc3757_enabled=False,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
     )
     MSC3757v11 = RoomVersion(
         # MSC3757 (Restricting who can overwrite a state event) based on room version "11"
@@ -394,6 +427,52 @@ class RoomVersions:
         enforce_int_power_levels=True,
         msc3931_push_features=(),
         msc3757_enabled=True,
+        msc4289_creator_power_enabled=False,
+        msc4291_room_ids_as_hashes=False,
+    )
+    HydraV11 = RoomVersion(
+        "org.matrix.hydra.11",
+        RoomDisposition.UNSTABLE,
+        EventFormatVersions.ROOM_V11_HYDRA_PLUS,
+        StateResolutionVersions.V2_1,  # Changed from v11
+        enforce_key_validity=True,
+        special_case_aliases_auth=False,
+        strict_canonicaljson=True,
+        limit_notifications_power_levels=True,
+        implicit_room_creator=True,  # Used by MSC3820
+        updated_redaction_rules=True,  # Used by MSC3820
+        restricted_join_rule=True,
+        restricted_join_rule_fix=True,
+        knock_join_rule=True,
+        msc3389_relation_redactions=False,
+        knock_restricted_join_rule=True,
+        enforce_int_power_levels=True,
+        msc3931_push_features=(),
+        msc3757_enabled=False,
+        msc4289_creator_power_enabled=True,  # Changed from v11
+        msc4291_room_ids_as_hashes=True,  # Changed from v11
+    )
+    V12 = RoomVersion(
+        "12",
+        RoomDisposition.STABLE,
+        EventFormatVersions.ROOM_V11_HYDRA_PLUS,
+        StateResolutionVersions.V2_1,  # Changed from v11
+        enforce_key_validity=True,
+        special_case_aliases_auth=False,
+        strict_canonicaljson=True,
+        limit_notifications_power_levels=True,
+        implicit_room_creator=True,  # Used by MSC3820
+        updated_redaction_rules=True,  # Used by MSC3820
+        restricted_join_rule=True,
+        restricted_join_rule_fix=True,
+        knock_join_rule=True,
+        msc3389_relation_redactions=False,
+        knock_restricted_join_rule=True,
+        enforce_int_power_levels=True,
+        msc3931_push_features=(),
+        msc3757_enabled=False,
+        msc4289_creator_power_enabled=True,  # Changed from v11
+        msc4291_room_ids_as_hashes=True,  # Changed from v11
     )
 
 
@@ -411,8 +490,10 @@ KNOWN_ROOM_VERSIONS: Dict[str, RoomVersion] = {
         RoomVersions.V9,
         RoomVersions.V10,
         RoomVersions.V11,
+        RoomVersions.V12,
         RoomVersions.MSC3757v10,
         RoomVersions.MSC3757v11,
+        RoomVersions.HydraV11,
     )
 }
 

synapse/config/experimental.py

@@ -535,11 +535,15 @@ class ExperimentalConfig(Config):
             "msc4108_delegation_endpoint", None
         )
 
+        auth_delegated = self.msc3861.enabled or (
+            config.get("matrix_authentication_service") or {}
+        ).get("enabled", False)
+
         if (
             self.msc4108_enabled or self.msc4108_delegation_endpoint is not None
-        ) and not self.msc3861.enabled:
+        ) and not auth_delegated:
             raise ConfigError(
-                "MSC4108 requires MSC3861 to be enabled",
+                "MSC4108 requires MSC3861 or matrix_authentication_service to be enabled",
                 ("experimental", "msc4108_delegation_endpoint"),
             )
 

synapse/crypto/event_signing.py

@@ -101,6 +101,9 @@ def compute_content_hash(
     event_dict.pop("outlier", None)
     event_dict.pop("destinations", None)
 
+    # N.B. no need to pop the room_id from create events in MSC4291 rooms
+    # as they shouldn't have one.
+
     event_json_bytes = encode_canonical_json(event_dict)
 
     hashed = hash_algorithm(event_json_bytes)

synapse/event_auth.py

@@ -45,6 +45,7 @@ from signedjson.sign import SignatureVerifyException, verify_signed_json
 from unpaddedbase64 import decode_base64
 
 from synapse.api.constants import (
+    CREATOR_POWER_LEVEL,
     MAX_PDU_SIZE,
     EventContentFields,
     EventTypes,
@@ -64,6 +65,7 @@ from synapse.api.room_versions import (
     RoomVersion,
     RoomVersions,
 )
+from synapse.events import is_creator
 from synapse.state import CREATE_KEY
 from synapse.storage.databases.main.events_worker import EventRedactBehaviour
 from synapse.types import (
@@ -261,7 +263,8 @@ async def check_state_independent_auth_rules(
                 f"Event {event.event_id} has unexpected auth_event for {k}: {auth_event_id}",
             )
 
-        # We also need to check that the auth event itself is not rejected.
+        # 2.3 ... If there are entries which were themselves rejected under the checks performed on receipt
+        # of a PDU, reject.
         if auth_event.rejected_reason:
             raise AuthError(
                 403,
@@ -271,7 +274,7 @@ async def check_state_independent_auth_rules(
 
         auth_dict[k] = auth_event_id
 
-    # 3. If event does not have a m.room.create in its auth_events, reject.
+    # 2.4. If event does not have a m.room.create in its auth_events, reject.
     creation_event = auth_dict.get((EventTypes.Create, ""), None)
     if not creation_event:
         raise AuthError(403, "No create event in auth events")
@@ -311,13 +314,14 @@ def check_state_dependent_auth_rules(
 
     # Later code relies on there being a create event e.g _can_federate, _is_membership_change_allowed
     # so produce a more intelligible error if we don't have one.
-    if auth_dict.get(CREATE_KEY) is None:
+    create_event = auth_dict.get(CREATE_KEY)
+    if create_event is None:
         raise AuthError(
             403, f"Event {event.event_id} is missing a create event in auth_events."
         )
 
     # additional check for m.federate
-    creating_domain = get_domain_from_id(event.room_id)
+    creating_domain = get_domain_from_id(create_event.sender)
     originating_domain = get_domain_from_id(event.sender)
     if creating_domain != originating_domain:
         if not _can_federate(event, auth_dict):
@@ -470,12 +474,20 @@ def _check_create(event: "EventBase") -> None:
     if event.prev_event_ids():
         raise AuthError(403, "Create event has prev events")
 
-    # 1.2 If the domain of the room_id does not match the domain of the sender,
-    # reject.
-    sender_domain = get_domain_from_id(event.sender)
-    room_id_domain = get_domain_from_id(event.room_id)
-    if room_id_domain != sender_domain:
-        raise AuthError(403, "Creation event's room_id domain does not match sender's")
+    if event.room_version.msc4291_room_ids_as_hashes:
+        # 1.2 If the create event has a room_id, reject
+        if "room_id" in event:
+            raise AuthError(403, "Create event has a room_id")
+    else:
+        # 1.2 If the domain of the room_id does not match the domain of the sender,
+        # reject.
+        if not event.room_version.msc4291_room_ids_as_hashes:
+            sender_domain = get_domain_from_id(event.sender)
+            room_id_domain = get_domain_from_id(event.room_id)
+            if room_id_domain != sender_domain:
+                raise AuthError(
+                    403, "Creation event's room_id domain does not match sender's"
+                )
 
     # 1.3 If content.room_version is present and is not a recognised version, reject
     room_version_prop = event.content.get("room_version", "1")
@@ -492,6 +504,16 @@ def _check_create(event: "EventBase") -> None:
     ):
         raise AuthError(403, "Create event lacks a 'creator' property")
 
+    # 1.5 If the additional_creators field is present and is not an array of strings where each
+    # string is a valid user ID, reject.
+    if (
+        event.room_version.msc4289_creator_power_enabled
+        and EventContentFields.ADDITIONAL_CREATORS in event.content
+    ):
+        check_valid_additional_creators(
+            event.content[EventContentFields.ADDITIONAL_CREATORS]
+        )
+
 
 def _can_federate(event: "EventBase", auth_events: StateMap["EventBase"]) -> bool:
     creation_event = auth_events.get((EventTypes.Create, ""))
@@ -533,7 +555,13 @@ def _is_membership_change_allowed(
 
     target_user_id = event.state_key
 
-    creating_domain = get_domain_from_id(event.room_id)
+    # We need the create event in order to check if we can federate or not.
+    # If it's missing, yell loudly. Previously we only did this inside the
+    # _can_federate check.
+    create_event = auth_events.get((EventTypes.Create, ""))
+    if not create_event:
+        raise AuthError(403, "Create event missing from auth_events")
+    creating_domain = get_domain_from_id(create_event.sender)
     target_domain = get_domain_from_id(target_user_id)
     if creating_domain != target_domain:
         if not _can_federate(event, auth_events):
@@ -903,6 +931,32 @@ def _check_power_levels(
         except Exception:
             raise SynapseError(400, "Not a valid power level: %s" % (v,))
 
+    if room_version_obj.msc4289_creator_power_enabled:
+        # Enforce the creator does not appear in the users map
+        create_event = auth_events.get((EventTypes.Create, ""))
+        if not create_event:
+            raise SynapseError(
+                400, "Cannot check power levels without a create event in auth_events"
+            )
+        if create_event.sender in user_list:
+            raise SynapseError(
+                400,
+                "Creator user %s must not appear in content.users"
+                % (create_event.sender,),
+            )
+        additional_creators = create_event.content.get(
+            EventContentFields.ADDITIONAL_CREATORS, []
+        )
+        if additional_creators:
+            creators_in_user_list = set(additional_creators).intersection(
+                set(user_list)
+            )
+            if len(creators_in_user_list) > 0:
+                raise SynapseError(
+                    400,
+                    "Additional creators users must not appear in content.users",
+                )
+
     # Reject events with stringy power levels if required by room version
     if (
         event.type == EventTypes.PowerLevels
@@ -1028,6 +1082,9 @@ def get_user_power_level(user_id: str, auth_events: StateMap["EventBase"]) -> in
         "A create event in the auth events chain is required to calculate user power level correctly,"
         " but was not found. This indicates a bug"
     )
+    if create_event.room_version.msc4289_creator_power_enabled:
+        if is_creator(create_event, user_id):
+            return CREATOR_POWER_LEVEL
     power_level_event = get_power_level_event(auth_events)
     if power_level_event:
         level = power_level_event.content.get("users", {}).get(user_id)
@@ -1188,3 +1245,26 @@ def auth_types_for_event(
                 auth_types.add(key)
 
     return auth_types
+
+
+def check_valid_additional_creators(additional_creators: Any) -> None:
+    """Check if the additional_creators provided is valid according to MSC4289.
+
+    The additional_creators can be supplied from an m.room.create event or from an /upgrade request.
+
+    Raises:
+        AuthError if the additional_creators is invalid for some reason.
+    """
+    if type(additional_creators) is not list:
+        raise AuthError(400, "additional_creators must be an array")
+    for entry in additional_creators:
+        if type(entry) is not str:
+            raise AuthError(400, "entry in additional_creators is not a string")
+        if not UserID.is_valid(entry):
+            raise AuthError(400, "entry in additional_creators is not a valid user ID")
+        # UserID.is_valid doesn't actually validate everything, so check the rest manually.
+        if len(entry) > 255 or len(entry.encode("utf-8")) > 255:
+            raise AuthError(
+                400,
+                "entry in additional_creators too long",
+            )

synapse/events/__init__.py

@@ -41,10 +41,13 @@ from typing import (
 import attr
 from unpaddedbase64 import encode_base64
 
-from synapse.api.constants import EventTypes, RelationTypes
+from synapse.api.constants import EventContentFields, EventTypes, RelationTypes
 from synapse.api.room_versions import EventFormatVersions, RoomVersion, RoomVersions
 from synapse.synapse_rust.events import EventInternalMetadata
-from synapse.types import JsonDict, StrCollection
+from synapse.types import (
+    JsonDict,
+    StrCollection,
+)
 from synapse.util.caches import intern_dict
 from synapse.util.frozenutils import freeze
 
@@ -205,11 +208,12 @@ class EventBase(metaclass=abc.ABCMeta):
 
         self.internal_metadata = EventInternalMetadata(internal_metadata_dict)
 
+        self._stitched_ordering: Optional[int] = None
+
     depth: DictProperty[int] = DictProperty("depth")
     content: DictProperty[JsonDict] = DictProperty("content")
     hashes: DictProperty[Dict[str, str]] = DictProperty("hashes")
     origin_server_ts: DictProperty[int] = DictProperty("origin_server_ts")
-    room_id: DictProperty[str] = DictProperty("room_id")
     sender: DictProperty[str] = DictProperty("sender")
     # TODO state_key should be Optional[str]. This is generally asserted in Synapse
     # by calling is_state() first (which ensures it is not None), but it is hard (not possible?)
@@ -224,6 +228,10 @@ class EventBase(metaclass=abc.ABCMeta):
     def event_id(self) -> str:
         raise NotImplementedError()
 
+    @property
+    def room_id(self) -> str:
+        raise NotImplementedError()
+
     @property
     def membership(self) -> str:
         return self.content["membership"]
@@ -317,6 +325,20 @@ class EventBase(metaclass=abc.ABCMeta):
         # this will be a no-op if the event dict is already frozen.
         self._dict = freeze(self._dict)
 
+    def assign_stitched_ordering(self, stitched_ordering: int) -> None:
+        """Assign a stitched ordering to this event, if one has not already been assigned.
+
+        TODO: figure out a way to only expose this on events that have not yet been persisted.
+        """
+        if self._stitched_ordering is not None:
+            raise RuntimeError("Attempt to assign stitched ordering twice")
+        self._stitched_ordering = stitched_ordering
+
+    @property
+    def stitched_ordering(self) -> Optional[int]:
+        """Return the stitched ordering for this event. If one has not (yet) been assigned, returns `None`."""
+        return self._stitched_ordering
+
     def __str__(self) -> str:
         return self.__repr__()
 
@@ -386,6 +408,10 @@ class FrozenEvent(EventBase):
     def event_id(self) -> str:
         return self._event_id
 
+    @property
+    def room_id(self) -> str:
+        return self._dict["room_id"]
+
 
 class FrozenEventV2(EventBase):
     format_version = EventFormatVersions.ROOM_V3  # All events of this type are V2
@@ -443,6 +469,10 @@ class FrozenEventV2(EventBase):
         self._event_id = "$" + encode_base64(compute_event_reference_hash(self)[1])
         return self._event_id
 
+    @property
+    def room_id(self) -> str:
+        return self._dict["room_id"]
+
     def prev_event_ids(self) -> List[str]:
         """Returns the list of prev event IDs. The order matches the order
         specified in the event, though there is no meaning to it.
@@ -481,6 +511,67 @@ class FrozenEventV3(FrozenEventV2):
         return self._event_id
 
 
+class FrozenEventV4(FrozenEventV3):
+    """FrozenEventV4 for MSC4291 room IDs are hashes"""
+
+    format_version = EventFormatVersions.ROOM_V11_HYDRA_PLUS
+
+    """Override the room_id for m.room.create events"""
+
+    def __init__(
+        self,
+        event_dict: JsonDict,
+        room_version: RoomVersion,
+        internal_metadata_dict: Optional[JsonDict] = None,
+        rejected_reason: Optional[str] = None,
+    ):
+        super().__init__(
+            event_dict=event_dict,
+            room_version=room_version,
+            internal_metadata_dict=internal_metadata_dict,
+            rejected_reason=rejected_reason,
+        )
+        self._room_id: Optional[str] = None
+
+    @property
+    def room_id(self) -> str:
+        # if we have calculated the room ID already, don't do it again.
+        if self._room_id:
+            return self._room_id
+
+        is_create_event = self.type == EventTypes.Create and self.get_state_key() == ""
+
+        # for non-create events: use the supplied value from the JSON, as per FrozenEventV3
+        if not is_create_event:
+            self._room_id = self._dict["room_id"]
+            assert self._room_id is not None
+            return self._room_id
+
+        # for create events: calculate the room ID
+        from synapse.crypto.event_signing import compute_event_reference_hash
+
+        self._room_id = "!" + encode_base64(
+            compute_event_reference_hash(self)[1], urlsafe=True
+        )
+        return self._room_id
+
+    def auth_event_ids(self) -> StrCollection:
+        """Returns the list of auth event IDs. The order matches the order
+        specified in the event, though there is no meaning to it.
+        Returns:
+            The list of event IDs of this event's auth_events
+            Includes the creation event ID for convenience of all the codepaths
+            which expects the auth chain to include the creator ID, even though
+            it's explicitly not included on the wire. Excludes the create event
+            for the create event itself.
+        """
+        create_event_id = "$" + self.room_id[1:]
+        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]
+
+
 def _event_type_from_format_version(
     format_version: int,
 ) -> Type[Union[FrozenEvent, FrozenEventV2, FrozenEventV3]]:
@@ -500,6 +591,8 @@ def _event_type_from_format_version(
         return FrozenEventV2
     elif format_version == EventFormatVersions.ROOM_V4_PLUS:
         return FrozenEventV3
+    elif format_version == EventFormatVersions.ROOM_V11_HYDRA_PLUS:
+        return FrozenEventV4
     else:
         raise Exception("No event format %r" % (format_version,))
 
@@ -559,6 +652,23 @@ def relation_from_event(event: EventBase) -> Optional[_EventRelation]:
     return _EventRelation(parent_id, rel_type, aggregation_key)
 
 
+def is_creator(create: EventBase, user_id: str) -> bool:
+    """
+    Return true if the provided user ID is the room creator.
+
+    This includes additional creators in MSC4289.
+    """
+    assert create.type == EventTypes.Create
+    if create.sender == user_id:
+        return True
+    if create.room_version.msc4289_creator_power_enabled:
+        additional_creators = set(
+            create.content.get(EventContentFields.ADDITIONAL_CREATORS, [])
+        )
+        return user_id in additional_creators
+    return False
+
+
 @attr.s(slots=True, frozen=True, auto_attribs=True)
 class StrippedStateEvent:
     """

synapse/events/builder.py

@@ -82,7 +82,8 @@ class EventBuilder:
 
     room_version: RoomVersion
 
-    room_id: str
+    # MSC4291 makes the room ID == the create event ID. This means the create event has no room_id.
+    room_id: Optional[str]
     type: str
     sender: str
 
@@ -142,7 +143,14 @@ class EventBuilder:
         Returns:
             The signed and hashed event.
         """
+        # Create events always have empty auth_events.
+        if self.type == EventTypes.Create and self.is_state() and self.state_key == "":
+            auth_event_ids = []
+
+        # Calculate auth_events for non-create events
         if auth_event_ids is None:
+            # Every non-create event must have a room ID
+            assert self.room_id is not None
             state_ids = await self._state.compute_state_after_events(
                 self.room_id,
                 prev_event_ids,
@@ -224,12 +232,31 @@ class EventBuilder:
             "auth_events": auth_events,
             "prev_events": prev_events,
             "type": self.type,
-            "room_id": self.room_id,
             "sender": self.sender,
             "content": self.content,
             "unsigned": self.unsigned,
             "depth": depth,
         }
+        if self.room_id is not None:
+            event_dict["room_id"] = self.room_id
+
+        if self.room_version.msc4291_room_ids_as_hashes:
+            # In MSC4291: the create event has no room ID as the create event ID /is/ the room ID.
+            if (
+                self.type == EventTypes.Create
+                and self.is_state()
+                and self._state_key == ""
+            ):
+                assert self.room_id is None
+            else:
+                # All other events do not reference the create event in auth_events, as the room ID
+                # /is/ the create event. However, the rest of the code (for consistency between room
+                # versions) assume that the create event remains part of the auth events. c.f. event
+                # class which automatically adds the create event when `.auth_event_ids()` is called
+                assert self.room_id is not None
+                create_event_id = "$" + self.room_id[1:]
+                auth_event_ids.remove(create_event_id)
+                event_dict["auth_events"] = auth_event_ids
 
         if self.is_state():
             event_dict["state_key"] = self._state_key
@@ -285,7 +312,7 @@ class EventBuilderFactory:
             room_version=room_version,
             type=key_values["type"],
             state_key=key_values.get("state_key"),
-            room_id=key_values["room_id"],
+            room_id=key_values.get("room_id"),
             sender=key_values["sender"],
             content=key_values.get("content", {}),
             unsigned=key_values.get("unsigned", {}),

synapse/events/snapshot.py

@@ -306,6 +306,12 @@ class EventContext(UnpersistedEventContextBase):
         )
 
 
+EventPersistencePair = Tuple[EventBase, EventContext]
+"""
+The combination of an event to be persisted and its context.
+"""
+
+
 @attr.s(slots=True, auto_attribs=True)
 class UnpersistedEventContext(UnpersistedEventContextBase):
     """
@@ -363,7 +369,7 @@ class UnpersistedEventContext(UnpersistedEventContextBase):
         room_id: str,
         last_known_state_group: int,
         datastore: "StateGroupDataStore",
-    ) -> List[Tuple[EventBase, EventContext]]:
+    ) -> List[EventPersistencePair]:
         """
         Takes a list of events and their associated unpersisted contexts and persists
         the unpersisted contexts, returning a list of events and persisted contexts.

synapse/events/utils.py

@@ -26,8 +26,8 @@ from typing import (
     Any,
     Awaitable,
     Callable,
+    Collection,
     Dict,
-    Iterable,
     List,
     Mapping,
     Match,
@@ -49,6 +49,7 @@ from synapse.api.constants import (
 )
 from synapse.api.errors import Codes, SynapseError
 from synapse.api.room_versions import RoomVersion
+from synapse.logging.opentracing import SynapseTags, set_tag, trace
 from synapse.types import JsonDict, Requester
 
 from . import EventBase, StrippedStateEvent, make_event_from_dict
@@ -176,9 +177,12 @@ def prune_event_dict(room_version: RoomVersion, event_dict: JsonDict) -> JsonDic
         if room_version.updated_redaction_rules:
             # MSC2176 rules state that create events cannot have their `content` redacted.
             new_content = event_dict["content"]
-        elif not room_version.implicit_room_creator:
+        if not room_version.implicit_room_creator:
             # Some room versions give meaning to `creator`
             add_fields("creator")
+        if room_version.msc4291_room_ids_as_hashes:
+            # room_id is not allowed on the create event as it's derived from the event ID
+            allowed_keys.remove("room_id")
 
     elif event_type == EventTypes.JoinRules:
         add_fields("join_rule")
@@ -527,6 +531,10 @@ def serialize_event(
     if config.as_client_event:
         d = config.event_format(d)
 
+    # Ensure the room_id field is set for create events in MSC4291 rooms
+    if e.type == EventTypes.Create and e.room_version.msc4291_room_ids_as_hashes:
+        d["room_id"] = e.room_id
+
     # If the event is a redaction, the field with the redacted event ID appears
     # in a different location depending on the room version. e.redacts handles
     # fetching from the proper location; copy it to the other location for forwards-
@@ -703,9 +711,10 @@ class EventClientSerializer:
                 "m.relations", {}
             ).update(serialized_aggregations)
 
+    @trace
     async def serialize_events(
         self,
-        events: Iterable[Union[JsonDict, EventBase]],
+        events: Collection[Union[JsonDict, EventBase]],
         time_now: int,
         *,
         config: SerializeEventConfig = _DEFAULT_SERIALIZE_EVENT_CONFIG,
@@ -724,6 +733,11 @@ class EventClientSerializer:
         Returns:
             The list of serialized events
         """
+        set_tag(
+            SynapseTags.FUNC_ARG_PREFIX + "events.length",
+            str(len(events)),
+        )
+
         return [
             await self.serialize_event(
                 event,
@@ -872,6 +886,14 @@ def strip_event(event: EventBase) -> JsonDict:
     Stripped state events can only have the `sender`, `type`, `state_key` and `content`
     properties present.
     """
+    # MSC4311: Ensure the create event is available on invites and knocks.
+    # TODO: Implement the rest of MSC4311
+    if (
+        event.room_version.msc4291_room_ids_as_hashes
+        and event.type == EventTypes.Create
+        and event.get_state_key() == ""
+    ):
+        return event.get_pdu_json()
 
     return {
         "type": event.type,

synapse/events/validator.py

@@ -183,8 +183,18 @@ class EventValidator:
         fields an event would have
         """
 
+        create_event_as_room_id = (
+            event.room_version.msc4291_room_ids_as_hashes
+            and event.type == EventTypes.Create
+            and hasattr(event, "state_key")
+            and event.state_key == ""
+        )
+
         strings = ["room_id", "sender", "type"]
 
+        if create_event_as_room_id:
+            strings.remove("room_id")
+
         if hasattr(event, "state_key"):
             strings.append("state_key")
 
@@ -192,7 +202,14 @@ class EventValidator:
             if not isinstance(getattr(event, s), str):
                 raise SynapseError(400, "Not '%s' a string type" % (s,))
 
-        RoomID.from_string(event.room_id)
+        if not create_event_as_room_id:
+            assert event.room_id is not None
+            RoomID.from_string(event.room_id)
+            if event.room_version.msc4291_room_ids_as_hashes and not RoomID.is_valid(
+                event.room_id
+            ):
+                raise SynapseError(400, f"Invalid room ID '{event.room_id}'")
+
         UserID.from_string(event.sender)
 
         if event.type == EventTypes.Message:

synapse/federation/federation_base.py

@@ -343,6 +343,21 @@ def event_from_pdu_json(pdu_json: JsonDict, room_version: RoomVersion) -> EventB
     if room_version.strict_canonicaljson:
         validate_canonicaljson(pdu_json)
 
+    # enforce that MSC4291 auth events don't include the create event.
+    # N.B. if they DO include a spurious create event, it'll fail auth checks elsewhere, so we don't
+    # need to do expensive DB lookups to find which event ID is the create event here.
+    if room_version.msc4291_room_ids_as_hashes:
+        room_id = pdu_json.get("room_id")
+        if room_id:
+            create_event_id = "$" + room_id[1:]
+            auth_events = pdu_json.get("auth_events")
+            if auth_events:
+                if create_event_id in auth_events:
+                    raise SynapseError(
+                        400,
+                        "auth_events must not contain the create event",
+                        Codes.BAD_JSON,
+                    )
     event = make_event_from_dict(pdu_json, room_version)
     return event
 

synapse/federation/federation_server.py

@@ -59,7 +59,7 @@ from synapse.api.errors import (
 from synapse.api.room_versions import KNOWN_ROOM_VERSIONS, RoomVersion
 from synapse.crypto.event_signing import compute_event_signature
 from synapse.events import EventBase
-from synapse.events.snapshot import EventContext
+from synapse.events.snapshot import EventPersistencePair
 from synapse.federation.federation_base import (
     FederationBase,
     InvalidEventSignatureError,
@@ -914,7 +914,7 @@ class FederationServer(FederationBase):
 
     async def _on_send_membership_event(
         self, origin: str, content: JsonDict, membership_type: str, room_id: str
-    ) -> Tuple[EventBase, EventContext]:
+    ) -> EventPersistencePair:
         """Handle an on_send_{join,leave,knock} request
 
         Does some preliminary validation before passing the request on to the

synapse/federation/send_queue.py

@@ -37,6 +37,7 @@ Events are replicated via a separate events stream.
 """
 
 import logging
+from enum import Enum
 from typing import (
     TYPE_CHECKING,
     Dict,
@@ -67,6 +68,25 @@ if TYPE_CHECKING:
 logger = logging.getLogger(__name__)
 
 
+class QueueNames(str, Enum):
+    PRESENCE_MAP = "presence_map"
+    KEYED_EDU = "keyed_edu"
+    KEYED_EDU_CHANGED = "keyed_edu_changed"
+    EDUS = "edus"
+    POS_TIME = "pos_time"
+    PRESENCE_DESTINATIONS = "presence_destinations"
+
+
+queue_name_to_gauge_map: Dict[QueueNames, LaterGauge] = {}
+
+for queue_name in QueueNames:
+    queue_name_to_gauge_map[queue_name] = LaterGauge(
+        name=f"synapse_federation_send_queue_{queue_name.value}_size",
+        desc="",
+        labelnames=[SERVER_NAME_LABEL],
+    )
+
+
 class FederationRemoteSendQueue(AbstractFederationSender):
     """A drop in replacement for FederationSender"""
 
@@ -111,23 +131,16 @@ class FederationRemoteSendQueue(AbstractFederationSender):
         # we make a new function, so we need to make a new function so the inner
         # lambda binds to the queue rather than to the name of the queue which
         # changes. ARGH.
-        def register(name: str, queue: Sized) -> None:
-            LaterGauge(
-                name="synapse_federation_send_queue_%s_size" % (queue_name,),
-                desc="",
-                labelnames=[SERVER_NAME_LABEL],
-                caller=lambda: {(self.server_name,): len(queue)},
+        def register(queue_name: QueueNames, queue: Sized) -> None:
+            queue_name_to_gauge_map[queue_name].register_hook(
+                homeserver_instance_id=hs.get_instance_id(),
+                hook=lambda: {(self.server_name,): len(queue)},
             )
 
-        for queue_name in [
-            "presence_map",
-            "keyed_edu",
-            "keyed_edu_changed",
-            "edus",
-            "pos_time",
-            "presence_destinations",
-        ]:
-            register(queue_name, getattr(self, queue_name))
+        for queue_name in QueueNames:
+            queue = getattr(self, queue_name.value)
+            assert isinstance(queue, Sized)
+            register(queue_name, queue=queue)
 
         self.clock.looping_call(self._clear_queue, 30 * 1000)
 

synapse/federation/sender/__init__.py

@@ -199,6 +199,24 @@ sent_pdus_destination_dist_total = Counter(
     labelnames=[SERVER_NAME_LABEL],
 )
 
+transaction_queue_pending_destinations_gauge = LaterGauge(
+    name="synapse_federation_transaction_queue_pending_destinations",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+
+transaction_queue_pending_pdus_gauge = LaterGauge(
+    name="synapse_federation_transaction_queue_pending_pdus",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+
+transaction_queue_pending_edus_gauge = LaterGauge(
+    name="synapse_federation_transaction_queue_pending_edus",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+
 # Time (in s) to wait before trying to wake up destinations that have
 # catch-up outstanding.
 # Please note that rate limiting still applies, so while the loop is
@@ -398,11 +416,9 @@ class FederationSender(AbstractFederationSender):
         # map from destination to PerDestinationQueue
         self._per_destination_queues: Dict[str, PerDestinationQueue] = {}
 
-        LaterGauge(
-            name="synapse_federation_transaction_queue_pending_destinations",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=lambda: {
+        transaction_queue_pending_destinations_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(),
+            hook=lambda: {
                 (self.server_name,): sum(
                     1
                     for d in self._per_destination_queues.values()
@@ -410,22 +426,17 @@ class FederationSender(AbstractFederationSender):
                 )
             },
         )
-
-        LaterGauge(
-            name="synapse_federation_transaction_queue_pending_pdus",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=lambda: {
+        transaction_queue_pending_pdus_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(),
+            hook=lambda: {
                 (self.server_name,): sum(
                     d.pending_pdu_count() for d in self._per_destination_queues.values()
                 )
             },
         )
-        LaterGauge(
-            name="synapse_federation_transaction_queue_pending_edus",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=lambda: {
+        transaction_queue_pending_edus_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(),
+            hook=lambda: {
                 (self.server_name,): sum(
                     d.pending_edu_count() for d in self._per_destination_queues.values()
                 )

synapse/handlers/delayed_events.py

@@ -215,9 +215,9 @@ class DelayedEventsHandler:
                 "Handling: %r %r, %s", delta.event_type, delta.state_key, delta.event_id
             )
 
-            event = await self._store.get_event(
-                delta.event_id, check_room_id=delta.room_id
-            )
+            event = await self._store.get_event(delta.event_id, allow_none=True)
+            if not event:
+                continue
             sender = UserID.from_string(event.sender)
 
             next_send_ts = await self._store.cancel_delayed_state_events(

synapse/handlers/event_auth.py

@@ -23,6 +23,8 @@ from typing import TYPE_CHECKING, List, Mapping, Optional, Union
 
 from synapse import event_auth
 from synapse.api.constants import (
+    CREATOR_POWER_LEVEL,
+    EventContentFields,
     EventTypes,
     JoinRules,
     Membership,
@@ -141,6 +143,8 @@ class EventAuthHandler:
         Raises:
             SynapseError if no appropriate user is found.
         """
+        create_event_id = current_state_ids[(EventTypes.Create, "")]
+        create_event = await self._store.get_event(create_event_id)
         power_level_event_id = current_state_ids.get((EventTypes.PowerLevels, ""))
         invite_level = 0
         users_default_level = 0
@@ -156,15 +160,28 @@ class EventAuthHandler:
 
         # Find the user with the highest power level (only interested in local
         # users).
+        user_power_level = 0
+        chosen_user = None
         local_users_in_room = await self._store.get_local_users_in_room(room_id)
-        chosen_user = max(
-            local_users_in_room,
-            key=lambda user: users.get(user, users_default_level),
-            default=None,
-        )
+        if create_event.room_version.msc4289_creator_power_enabled:
+            creators = set(
+                create_event.content.get(EventContentFields.ADDITIONAL_CREATORS, [])
+            )
+            creators.add(create_event.sender)
+            local_creators = creators.intersection(set(local_users_in_room))
+            if len(local_creators) > 0:
+                chosen_user = local_creators.pop()  # random creator
+                user_power_level = CREATOR_POWER_LEVEL
+        else:
+            chosen_user = max(
+                local_users_in_room,
+                key=lambda user: users.get(user, users_default_level),
+                default=None,
+            )
+            # Return the chosen if they can issue invites.
+            if chosen_user:
+                user_power_level = users.get(chosen_user, users_default_level)
 
-        # Return the chosen if they can issue invites.
-        user_power_level = users.get(chosen_user, users_default_level)
         if chosen_user and user_power_level >= invite_level:
             logger.debug(
                 "Found a user who can issue invites  %s with power level %d >= invite level %d",

synapse/handlers/federation_event.py

@@ -66,7 +66,11 @@ from synapse.event_auth import (
     validate_event_for_room_version,
 )
 from synapse.events import EventBase
-from synapse.events.snapshot import EventContext, UnpersistedEventContextBase
+from synapse.events.snapshot import (
+    EventContext,
+    EventPersistencePair,
+    UnpersistedEventContextBase,
+)
 from synapse.federation.federation_client import InvalidResponseError, PulledPduInfo
 from synapse.logging.context import nested_logging_context
 from synapse.logging.opentracing import (
@@ -82,6 +86,8 @@ from synapse.replication.http.federation import (
     ReplicationFederationSendEventsRestServlet,
 )
 from synapse.state import StateResolutionStore
+from synapse.storage.controllers.persist_events import assign_stitched_orders
+from synapse.storage.database import LoggingTransaction
 from synapse.storage.databases.main.events_worker import EventRedactBehaviour
 from synapse.types import (
     PersistedEventPosition,
@@ -341,7 +347,7 @@ class FederationEventHandler:
 
     async def on_send_membership_event(
         self, origin: str, event: EventBase
-    ) -> Tuple[EventBase, EventContext]:
+    ) -> EventPersistencePair:
         """
         We have received a join/leave/knock event for a room via send_join/leave/knock.
 
@@ -890,18 +896,30 @@ class FederationEventHandler:
         )
 
         @trace
-        async def _process_new_pulled_events(new_events: Collection[EventBase]) -> None:
-            # We want to sort these by depth so we process them and tell clients about
-            # them in order. It's also more efficient to backfill this way (`depth`
-            # ascending) because one backfill event is likely to be the `prev_event` of
-            # the next event we're going to process.
-            sorted_events = sorted(new_events, key=lambda x: x.depth)
+        async def _process_new_pulled_events(new_events: List[EventBase]) -> None:
+            room_id = new_events[0].room_id
+            await assign_stitched_orders(room_id, new_events, self._store)
+
+            # We want to sort these by stitched ordering, so that events that will
+            # be sent on to clients over /sync will receive stream_orderings that
+            # are consistent with stitched orderings (i.e. we will serve them to clients
+            # in the same order as stitched_order).
+            #
+            # It's also more efficient to backfill this way, because one backfill event
+            # is likely to be the `prev_event` of the next event we're going to process.
+            #
+            # Outliers will not yet have received a stitched ordering, but it doesn't
+            # really matter what order they get persisted in, because they don't get
+            # sent to clients and we don't do so much state resolution for them. We just
+            # persist them before any other events.
+
+            sorted_events = sorted(new_events, key=lambda x: (x.stitched_ordering or 0))
             for ev in sorted_events:
                 with nested_logging_context(ev.event_id):
                     await self._process_pulled_event(origin, ev, backfilled=backfilled)
 
         # Check if we've already tried to process these events at some point in the
-        # past. We aren't concerned with the expontntial backoff here, just whether it
+        # past. We aren't concerned with the exponential backoff here, just whether it
         # has failed to be processed before.
         event_ids_with_failed_pull_attempts = (
             await self._store.get_event_ids_with_failed_pull_attempts(
@@ -1712,7 +1730,7 @@ class FederationEventHandler:
             )
             auth_map.update(persisted_events)
 
-        events_and_contexts_to_persist: List[Tuple[EventBase, EventContext]] = []
+        events_and_contexts_to_persist: List[EventPersistencePair] = []
 
         async def prep(event: EventBase) -> None:
             with nested_logging_context(suffix=event.event_id):
@@ -1728,6 +1746,9 @@ class FederationEventHandler:
                             event,
                             auth_event_id,
                         )
+                        # Drop the event from the auth_map too, else we may incorrectly persist
+                        # events which depend on this dropped event.
+                        auth_map.pop(event.event_id, None)
                         return
                     auth.append(ae)
 
@@ -2222,7 +2243,7 @@ class FederationEventHandler:
     async def persist_events_and_notify(
         self,
         room_id: str,
-        event_and_contexts: Sequence[Tuple[EventBase, EventContext]],
+        event_and_contexts: Sequence[EventPersistencePair],
         backfilled: bool = False,
     ) -> int:
         """Persists events and tells the notifier/pushers about them, if
@@ -2378,3 +2399,32 @@ class FederationEventHandler:
                 len(ev.auth_event_ids()),
             )
             raise SynapseError(HTTPStatus.BAD_REQUEST, "Too many auth_events")
+
+
+def find_predecessors(event_ids: Iterable[str], batch: List[EventBase]) -> Set[str]:
+    """
+    Walk the tree of dependencies (in batch), and return every event that is
+    in batch, and is an ancestor of one of the supplied events.
+    """
+    found = set()
+    unexplored = set(event_ids)
+    while len(unexplored) > 0:
+        next_unexplored: Set[str] = set()
+
+        # Iterate through the incoming events, looking for events in our "unexplored"
+        # set. For each matching event, add it to the "found" set, and add its
+        # "prev_events" to the "unexplored" set for the next pass.
+        for event in batch:
+            if event.event_id in unexplored:
+                found.add(event.event_id)
+                next_unexplored.update(
+                    (
+                        event_id
+                        for event_id in event.prev_event_ids()
+                        if event_id not in found
+                    )
+                )
+
+        unexplored = next_unexplored
+
+    return found

synapse/handlers/message.py

@@ -57,6 +57,7 @@ from synapse.events import EventBase, relation_from_event
 from synapse.events.builder import EventBuilder
 from synapse.events.snapshot import (
     EventContext,
+    EventPersistencePair,
     UnpersistedEventContext,
     UnpersistedEventContextBase,
 )
@@ -688,7 +689,10 @@ class EventCreationHandler:
                         Codes.USER_ACCOUNT_SUSPENDED,
                     )
 
-        if event_dict["type"] == EventTypes.Create and event_dict["state_key"] == "":
+        is_create_event = (
+            event_dict["type"] == EventTypes.Create and event_dict["state_key"] == ""
+        )
+        if is_create_event:
             room_version_id = event_dict["content"]["room_version"]
             maybe_room_version_obj = KNOWN_ROOM_VERSIONS.get(room_version_id)
             if not maybe_room_version_obj:
@@ -794,6 +798,7 @@ class EventCreationHandler:
         """
         # the only thing the user can do is join the server notices room.
         if builder.type == EventTypes.Member:
+            assert builder.room_id is not None
             membership = builder.content.get("membership", None)
             if membership == Membership.JOIN:
                 return await self.store.is_server_notice_room(builder.room_id)
@@ -1259,13 +1264,40 @@ class EventCreationHandler:
                 for_verification=False,
             )
 
+        if (
+            builder.room_version.msc4291_room_ids_as_hashes
+            and builder.type == EventTypes.Create
+            and builder.is_state()
+        ):
+            if builder.room_id is not None:
+                raise SynapseError(
+                    400,
+                    "Cannot resend m.room.create event",
+                    Codes.INVALID_PARAM,
+                )
+        else:
+            assert builder.room_id is not None
+
         if prev_event_ids is not None:
             assert len(prev_event_ids) <= 10, (
                 "Attempting to create an event with %i prev_events"
                 % (len(prev_event_ids),)
             )
         else:
-            prev_event_ids = await self.store.get_prev_events_for_room(builder.room_id)
+            if builder.room_id:
+                prev_event_ids = await self.store.get_prev_events_for_room(
+                    builder.room_id
+                )
+            else:
+                prev_event_ids = []  # can only happen for the create event in MSC4291 rooms
+
+        if builder.type == EventTypes.Create and builder.is_state():
+            if len(prev_event_ids) != 0:
+                raise SynapseError(
+                    400,
+                    "Cannot resend m.room.create event",
+                    Codes.INVALID_PARAM,
+                )
 
         # We now ought to have some `prev_events` (unless it's a create event).
         #
@@ -1408,7 +1440,7 @@ class EventCreationHandler:
     async def handle_new_client_event(
         self,
         requester: Requester,
-        events_and_context: List[Tuple[EventBase, EventContext]],
+        events_and_context: List[EventPersistencePair],
         ratelimit: bool = True,
         extra_users: Optional[List[UserID]] = None,
         ignore_shadow_ban: bool = False,
@@ -1529,7 +1561,7 @@ class EventCreationHandler:
         self,
         requester: Requester,
         room_id: str,
-        prev_event_id: str,
+        prev_event_id: Optional[str],
         event_dicts: Sequence[JsonDict],
         ratelimit: bool = True,
         ignore_shadow_ban: bool = False,
@@ -1560,6 +1592,12 @@ class EventCreationHandler:
             # Nothing to do.
             return
 
+        if prev_event_id is None:
+            # Pick the latest forward extremity as the previous event ID.
+            prev_event_ids = await self.store.get_forward_extremities_for_room(room_id)
+            prev_event_ids.sort(key=lambda x: x[2])  # Sort by depth.
+            prev_event_id = prev_event_ids[-1][0]
+
         state_groups = await self._storage_controllers.state.get_state_group_for_events(
             [prev_event_id]
         )
@@ -1614,7 +1652,7 @@ class EventCreationHandler:
     async def _persist_events(
         self,
         requester: Requester,
-        events_and_context: List[Tuple[EventBase, EventContext]],
+        events_and_context: List[EventPersistencePair],
         ratelimit: bool = True,
         extra_users: Optional[List[UserID]] = None,
     ) -> EventBase:
@@ -1700,7 +1738,7 @@ class EventCreationHandler:
             raise
 
     async def cache_joined_hosts_for_events(
-        self, events_and_context: List[Tuple[EventBase, EventContext]]
+        self, events_and_context: List[EventPersistencePair]
     ) -> None:
         """Precalculate the joined hosts at each of the given events, when using Redis, so that
         external federation senders don't have to recalculate it themselves.
@@ -1806,7 +1844,7 @@ class EventCreationHandler:
     async def persist_and_notify_client_events(
         self,
         requester: Requester,
-        events_and_context: List[Tuple[EventBase, EventContext]],
+        events_and_context: List[EventPersistencePair],
         ratelimit: bool = True,
         extra_users: Optional[List[UserID]] = None,
     ) -> EventBase:
@@ -2228,6 +2266,7 @@ class EventCreationHandler:
                 original_event.room_version, third_party_result
             )
             self.validator.validate_builder(builder)
+            assert builder.room_id is not None
         except SynapseError as e:
             raise Exception(
                 "Third party rules module created an invalid event: " + e.msg,

synapse/handlers/presence.py

@@ -173,6 +173,18 @@ state_transition_counter = Counter(
     labelnames=["locality", "from", "to", SERVER_NAME_LABEL],
 )
 
+presence_user_to_current_state_size_gauge = LaterGauge(
+    name="synapse_handlers_presence_user_to_current_state_size",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+
+presence_wheel_timer_size_gauge = LaterGauge(
+    name="synapse_handlers_presence_wheel_timer_size",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+
 # If a user was last active in the last LAST_ACTIVE_GRANULARITY, consider them
 # "currently_active"
 LAST_ACTIVE_GRANULARITY = 60 * 1000
@@ -779,11 +791,9 @@ class PresenceHandler(BasePresenceHandler):
             EduTypes.PRESENCE, self.incoming_presence
         )
 
-        LaterGauge(
-            name="synapse_handlers_presence_user_to_current_state_size",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=lambda: {(self.server_name,): len(self.user_to_current_state)},
+        presence_user_to_current_state_size_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(),
+            hook=lambda: {(self.server_name,): len(self.user_to_current_state)},
         )
 
         # The per-device presence state, maps user to devices to per-device presence state.
@@ -882,11 +892,9 @@ class PresenceHandler(BasePresenceHandler):
                 60 * 1000,
             )
 
-        LaterGauge(
-            name="synapse_handlers_presence_wheel_timer_size",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=lambda: {(self.server_name,): len(self.wheel_timer)},
+        presence_wheel_timer_size_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(),
+            hook=lambda: {(self.server_name,): len(self.wheel_timer)},
         )
 
         # Used to handle sending of presence to newly joined users/servers

synapse/handlers/room.py

@@ -82,6 +82,7 @@ from synapse.types import (
     Requester,
     RoomAlias,
     RoomID,
+    RoomIdWithDomain,
     RoomStreamToken,
     StateMap,
     StrCollection,
@@ -93,6 +94,7 @@ from synapse.types import (
 from synapse.types.handlers import ShutdownRoomParams, ShutdownRoomResponse
 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.iterutils import batch_iter
 from synapse.util.stringutils import parse_and_validate_server_name
@@ -195,7 +197,13 @@ class RoomCreationHandler:
         )
 
     async def upgrade_room(
-        self, requester: Requester, old_room_id: str, new_version: RoomVersion
+        self,
+        requester: Requester,
+        old_room_id: str,
+        new_version: RoomVersion,
+        additional_creators: Optional[List[str]],
+        auto_member: bool = False,
+        ratelimit: bool = True,
     ) -> str:
         """Replace a room with a new room with a different version
 
@@ -203,6 +211,9 @@ class RoomCreationHandler:
             requester: the user requesting the upgrade
             old_room_id: the id of the room to be replaced
             new_version: the new room version to use
+            additional_creators: additional room creators, for MSC4289.
+            auto_member: Whether to automatically join local users to the new
+                room and send out invites to remote users.
 
         Returns:
             the new room id
@@ -210,11 +221,12 @@ class RoomCreationHandler:
         Raises:
             ShadowBanError if the requester is shadow-banned.
         """
-        await self.creation_ratelimiter.ratelimit(requester, update=False)
+        if ratelimit:
+            await self.creation_ratelimiter.ratelimit(requester, update=False)
 
-        # then apply the ratelimits
-        await self.common_request_ratelimiter.ratelimit(requester)
-        await self.creation_ratelimiter.ratelimit(requester)
+            # then apply the ratelimits
+            await self.common_request_ratelimiter.ratelimit(requester)
+            await self.creation_ratelimiter.ratelimit(requester)
 
         user_id = requester.user.to_string()
 
@@ -235,8 +247,29 @@ class RoomCreationHandler:
         old_room = await self.store.get_room(old_room_id)
         if old_room is None:
             raise NotFoundError("Unknown room id %s" % (old_room_id,))
+        old_room_is_public, _ = old_room
 
-        new_room_id = self._generate_room_id()
+        creation_event_with_context = None
+        if new_version.msc4291_room_ids_as_hashes:
+            old_room_create_event = await self.store.get_create_event_for_room(
+                old_room_id
+            )
+            creation_content = self._calculate_upgraded_room_creation_content(
+                old_room_create_event,
+                tombstone_event_id=None,
+                new_room_version=new_version,
+                additional_creators=additional_creators,
+            )
+            creation_event_with_context = await self._generate_create_event_for_room_id(
+                requester,
+                creation_content,
+                old_room_is_public,
+                new_version,
+            )
+            (create_event, _) = creation_event_with_context
+            new_room_id = create_event.room_id
+        else:
+            new_room_id = self._generate_room_id()
 
         # Try several times, it could fail with PartialStateConflictError
         # in _upgrade_room, cf comment in except block.
@@ -285,6 +318,9 @@ class RoomCreationHandler:
                     new_version,
                     tombstone_event,
                     tombstone_context,
+                    additional_creators,
+                    creation_event_with_context,
+                    auto_member=auto_member,
                 )
 
                 return ret
@@ -308,6 +344,11 @@ class RoomCreationHandler:
         new_version: RoomVersion,
         tombstone_event: EventBase,
         tombstone_context: synapse.events.snapshot.EventContext,
+        additional_creators: Optional[List[str]],
+        creation_event_with_context: Optional[
+            Tuple[EventBase, synapse.events.snapshot.EventContext]
+        ] = None,
+        auto_member: bool = False,
     ) -> str:
         """
         Args:
@@ -319,6 +360,10 @@ class RoomCreationHandler:
             new_version: the version to upgrade the room to
             tombstone_event: the tombstone event to send to the old room
             tombstone_context: the context for the tombstone event
+            additional_creators: additional room creators, for MSC4289.
+            creation_event_with_context: The new room's create event, for room IDs as create event IDs.
+            auto_member: Whether to automatically join local users to the new
+                room and send out invites to remote users.
 
         Raises:
             ShadowBanError if the requester is shadow-banned.
@@ -328,14 +373,16 @@ class RoomCreationHandler:
 
         logger.info("Creating new room %s to replace %s", new_room_id, old_room_id)
 
-        # create the new room. may raise a `StoreError` in the exceedingly unlikely
-        # event of a room ID collision.
-        await self.store.store_room(
-            room_id=new_room_id,
-            room_creator_user_id=user_id,
-            is_public=old_room[0],
-            room_version=new_version,
-        )
+        # We've already stored the room if we have the create event
+        if not creation_event_with_context:
+            # create the new room. may raise a `StoreError` in the exceedingly unlikely
+            # event of a room ID collision.
+            await self.store.store_room(
+                room_id=new_room_id,
+                room_creator_user_id=user_id,
+                is_public=old_room[0],
+                room_version=new_version,
+            )
 
         await self.clone_existing_room(
             requester,
@@ -343,6 +390,9 @@ class RoomCreationHandler:
             new_room_id=new_room_id,
             new_room_version=new_version,
             tombstone_event_id=tombstone_event.event_id,
+            additional_creators=additional_creators,
+            creation_event_with_context=creation_event_with_context,
+            auto_member=auto_member,
         )
 
         # now send the tombstone
@@ -376,6 +426,7 @@ class RoomCreationHandler:
             old_room_id,
             new_room_id,
             old_room_state,
+            additional_creators,
         )
 
         return new_room_id
@@ -386,6 +437,7 @@ class RoomCreationHandler:
         old_room_id: str,
         new_room_id: str,
         old_room_state: StateMap[str],
+        additional_creators: Optional[List[str]],
     ) -> None:
         """Send updated power levels in both rooms after an upgrade
 
@@ -394,7 +446,7 @@ class RoomCreationHandler:
             old_room_id: the id of the room to be replaced
             new_room_id: the id of the replacement room
             old_room_state: the state map for the old room
-
+            additional_creators: Additional creators in the new room.
         Raises:
             ShadowBanError if the requester is shadow-banned.
         """
@@ -450,6 +502,14 @@ class RoomCreationHandler:
             except AuthError as e:
                 logger.warning("Unable to update PLs in old room: %s", e)
 
+        new_room_version = await self.store.get_room_version(new_room_id)
+        if new_room_version.msc4289_creator_power_enabled:
+            self._remove_creators_from_pl_users_map(
+                old_room_pl_state.content.get("users", {}),
+                requester.user.to_string(),
+                additional_creators,
+            )
+
         await self.event_creation_handler.create_and_send_nonmember_event(
             requester,
             {
@@ -464,6 +524,36 @@ class RoomCreationHandler:
             ratelimit=False,
         )
 
+    def _calculate_upgraded_room_creation_content(
+        self,
+        old_room_create_event: EventBase,
+        tombstone_event_id: Optional[str],
+        new_room_version: RoomVersion,
+        additional_creators: Optional[List[str]],
+    ) -> JsonDict:
+        creation_content: JsonDict = {
+            "room_version": new_room_version.identifier,
+            "predecessor": {
+                "room_id": old_room_create_event.room_id,
+            },
+        }
+        if tombstone_event_id is not None:
+            creation_content["predecessor"]["event_id"] = tombstone_event_id
+        if (
+            additional_creators is not None
+            and new_room_version.msc4289_creator_power_enabled
+        ):
+            creation_content["additional_creators"] = additional_creators
+        # Check if old room was non-federatable
+        if not old_room_create_event.content.get(EventContentFields.FEDERATE, True):
+            # If so, mark the new room as non-federatable as well
+            creation_content[EventContentFields.FEDERATE] = False
+        # Copy the room type as per MSC3818.
+        room_type = old_room_create_event.content.get(EventContentFields.ROOM_TYPE)
+        if room_type is not None:
+            creation_content[EventContentFields.ROOM_TYPE] = room_type
+        return creation_content
+
     async def clone_existing_room(
         self,
         requester: Requester,
@@ -471,6 +561,11 @@ class RoomCreationHandler:
         new_room_id: str,
         new_room_version: RoomVersion,
         tombstone_event_id: str,
+        additional_creators: Optional[List[str]],
+        creation_event_with_context: Optional[
+            Tuple[EventBase, synapse.events.snapshot.EventContext]
+        ] = None,
+        auto_member: bool = False,
     ) -> None:
         """Populate a new room based on an old room
 
@@ -481,24 +576,27 @@ class RoomCreationHandler:
                 created with _generate_room_id())
             new_room_version: the new room version to use
             tombstone_event_id: the ID of the tombstone event in the old room.
+            additional_creators: additional room creators, for MSC4289.
+            creation_event_with_context: The create event of the new room, if the new room supports
+            room ID as create event ID hash.
+            auto_member: Whether to automatically join local users to the new
+                room and send out invites to remote users.
         """
         user_id = requester.user.to_string()
 
-        creation_content: JsonDict = {
-            "room_version": new_room_version.identifier,
-            "predecessor": {"room_id": old_room_id, "event_id": tombstone_event_id},
-        }
-
-        # Check if old room was non-federatable
-
         # Get old room's create event
         old_room_create_event = await self.store.get_create_event_for_room(old_room_id)
 
-        # Check if the create event specified a non-federatable room
-        if not old_room_create_event.content.get(EventContentFields.FEDERATE, True):
-            # If so, mark the new room as non-federatable as well
-            creation_content[EventContentFields.FEDERATE] = False
-
+        if creation_event_with_context:
+            create_event, _ = creation_event_with_context
+            creation_content = create_event.content
+        else:
+            creation_content = self._calculate_upgraded_room_creation_content(
+                old_room_create_event,
+                tombstone_event_id,
+                new_room_version,
+                additional_creators=additional_creators,
+            )
         initial_state = {}
 
         # Replicate relevant room events
@@ -514,11 +612,8 @@ class RoomCreationHandler:
             (EventTypes.PowerLevels, ""),
         ]
 
-        # Copy the room type as per MSC3818.
         room_type = old_room_create_event.content.get(EventContentFields.ROOM_TYPE)
         if room_type is not None:
-            creation_content[EventContentFields.ROOM_TYPE] = room_type
-
             # If the old room was a space, copy over the rooms in the space.
             if room_type == RoomTypes.SPACE:
                 types_to_copy.append((EventTypes.SpaceChild, None))
@@ -590,6 +685,14 @@ class RoomCreationHandler:
         if current_power_level_int < needed_power_level:
             user_power_levels[user_id] = needed_power_level
 
+        if new_room_version.msc4289_creator_power_enabled:
+            # the creator(s) cannot be in the users map
+            self._remove_creators_from_pl_users_map(
+                user_power_levels,
+                user_id,
+                additional_creators,
+            )
+
         # We construct what the body of a call to /createRoom would look like for passing
         # to the spam checker. We don't include a preset here, as we expect the
         # initial state to contain everything we need.
@@ -618,6 +721,7 @@ class RoomCreationHandler:
             invite_list=[],
             initial_state=initial_state,
             creation_content=creation_content,
+            creation_event_with_context=creation_event_with_context,
         )
 
         # Transfer membership events
@@ -631,7 +735,7 @@ class RoomCreationHandler:
             # `update_membership`, however in this case its fine to bypass as
             # these bans don't need any special treatment, i.e. the sender is in
             # the room and they don't need any extra signatures, etc.
-            for batched_events in batch_iter(ban_events, 1000):
+            for batched_ban_events in batch_iter(ban_events, 1000):
                 await self.event_creation_handler.create_and_send_new_client_events(
                     requester=requester,
                     room_id=new_room_id,
@@ -644,13 +748,201 @@ class RoomCreationHandler:
                             "sender": requester.user.to_string(),
                             "content": ban_event.content,
                         }
-                        for ban_event in batched_events
+                        for ban_event in batched_ban_events
                     ],
-                    ratelimit=False,
+                    ratelimit=False,  # We ratelimit the entire upgrade, not individual events.
                 )
 
-        # XXX invites/joins
-        # XXX 3pid invites
+        if auto_member:
+            logger.info("Joining local users to %s", new_room_id)
+
+            # 1. Copy over all joins for local
+            joined_profiles = await self.store.get_users_in_room_with_profiles(
+                old_room_id
+            )
+
+            local_user_ids = [
+                user_id for user_id in joined_profiles if self.hs.is_mine_id(user_id)
+            ]
+
+            logger.info("Local user IDs %s", local_user_ids)
+
+            for batched_local_user_ids in batch_iter(local_user_ids, 1000):
+                invites_to_send = []
+
+                # For each local user we create an invite event (from the
+                # upgrading user) plus a join event.
+                for local_user_id in batched_local_user_ids:
+                    if local_user_id == user_id:
+                        # Ignore the upgrading user, as they are already in the
+                        # new room.
+                        continue
+
+                    invites_to_send.append(
+                        {
+                            "type": EventTypes.Member,
+                            "state_key": local_user_id,
+                            "room_id": new_room_id,
+                            "sender": requester.user.to_string(),
+                            "content": {
+                                "membership": Membership.INVITE,
+                            },
+                        }
+                    )
+
+                    # If the user has profile information in the previous join,
+                    # add it to the content.
+                    #
+                    # We could instead copy over the contents from the old join
+                    # event, however a) that would require us to fetch all the
+                    # old join events (which is slow), and b) generally the join
+                    # events have no extra information in them. (We also believe
+                    # that most clients don't copy this information over either,
+                    # but we could be wrong.)
+                    content_profile = {}
+                    user_profile = joined_profiles[local_user_id]
+                    if user_profile.display_name:
+                        content_profile["displayname"] = user_profile.display_name
+                    if user_profile.avatar_url:
+                        content_profile["avatar_url"] = user_profile.avatar_url
+
+                    invites_to_send.append(
+                        {
+                            "type": EventTypes.Member,
+                            "state_key": local_user_id,
+                            "room_id": new_room_id,
+                            "sender": local_user_id,
+                            "content": {
+                                "membership": Membership.JOIN,
+                                **content_profile,
+                            },
+                        }
+                    )
+
+                await self.event_creation_handler.create_and_send_new_client_events(
+                    requester=requester,
+                    room_id=new_room_id,
+                    prev_event_id=None,
+                    event_dicts=invites_to_send,
+                    ratelimit=False,  # We ratelimit the entire upgrade, not individual events.
+                )
+
+            # Invite other users if the room is not public. If the room *is*
+            # public then users can simply directly join, and inviting them as
+            # well may lead to confusion.
+
+            join_rule_content = initial_state.get((EventTypes.JoinRules, ""), None)
+            is_public = False
+            if join_rule_content:
+                is_public = join_rule_content["join_rule"] == JoinRules.PUBLIC
+
+            if not is_public:
+                # Copy invites
+                # TODO: Copy over 3pid invites as well.
+                invited_users = await self.store.get_invited_users_in_room(
+                    room_id=old_room_id
+                )
+
+                # For local users we can just batch send the invites.
+                local_invited_users = [
+                    user_id for user_id in invited_users if self.hs.is_mine_id(user_id)
+                ]
+
+                logger.info(
+                    "Joining local user IDs %s to new room %s",
+                    local_invited_users,
+                    new_room_id,
+                )
+
+                for batched_local_invited_users in batch_iter(
+                    local_invited_users, 1000
+                ):
+                    invites_to_send = []
+                    leaves_to_send = []
+
+                    # For each local user we create an invite event (from the
+                    # upgrading user), and reject the invite event in the old
+                    # room.
+                    #
+                    # This ensures that the user ends up with a single invite to
+                    # the new room (rather than multiple invites which may be
+                    # noisy and confusing).
+                    for local_user_id in batched_local_invited_users:
+                        leaves_to_send.append(
+                            {
+                                "type": EventTypes.Member,
+                                "state_key": local_user_id,
+                                "room_id": old_room_id,
+                                "sender": local_user_id,
+                                "content": {
+                                    "membership": Membership.LEAVE,
+                                },
+                            }
+                        )
+                        invites_to_send.append(
+                            {
+                                "type": EventTypes.Member,
+                                "state_key": local_user_id,
+                                "room_id": new_room_id,
+                                "sender": requester.user.to_string(),
+                                "content": {
+                                    "membership": Membership.INVITE,
+                                },
+                            }
+                        )
+
+                    await self.event_creation_handler.create_and_send_new_client_events(
+                        requester=requester,
+                        room_id=old_room_id,
+                        prev_event_id=None,
+                        event_dicts=leaves_to_send,
+                        ratelimit=False,  # We ratelimit the entire upgrade, not individual events.
+                    )
+                    await self.event_creation_handler.create_and_send_new_client_events(
+                        requester=requester,
+                        room_id=new_room_id,
+                        prev_event_id=None,
+                        event_dicts=invites_to_send,
+                        ratelimit=False,
+                    )
+
+                # For remote users we send invites one by one, as we need to
+                # send each one to the remote server.
+                #
+                # We also invite joined remote users who were in the old room.
+                remote_user_ids = [
+                    user_id
+                    for user_id in itertools.chain(invited_users, joined_profiles)
+                    if not self.hs.is_mine_id(user_id)
+                ]
+
+                logger.debug("Inviting remote user IDs %s", remote_user_ids)
+
+                async def remote_invite(remote_user: str) -> None:
+                    try:
+                        await self.room_member_handler.update_membership(
+                            requester,
+                            UserID.from_string(remote_user),
+                            new_room_id,
+                            Membership.INVITE,
+                            ratelimit=False,  # We ratelimit the entire upgrade, not individual events.
+                        )
+                    except SynapseError as e:
+                        # If we fail to invite a remote user, we log it but continue
+                        # on with the upgrade.
+                        logger.warning(
+                            "Failed to invite remote user %s to new room %s: %s",
+                            remote_user,
+                            new_room_id,
+                            e,
+                        )
+
+                # We do this concurrently, as it can take a while to invite
+                await concurrently_execute(
+                    remote_invite,
+                    remote_user_ids,
+                    10,
+                )
 
     async def _move_aliases_to_new_room(
         self,
@@ -904,6 +1196,7 @@ class RoomCreationHandler:
         power_level_content_override = config.get("power_level_content_override")
         if (
             power_level_content_override
+            and not room_version.msc4289_creator_power_enabled  # this validation doesn't apply in MSC4289 rooms
             and "users" in power_level_content_override
             and user_id not in power_level_content_override["users"]
         ):
@@ -933,11 +1226,41 @@ class RoomCreationHandler:
                     additional_fields=spam_check[1],
                 )
 
-        room_id = await self._generate_and_create_room_id(
-            creator_id=user_id,
-            is_public=is_public,
-            room_version=room_version,
-        )
+        creation_content = config.get("creation_content", {})
+        # override any attempt to set room versions via the creation_content
+        creation_content["room_version"] = room_version.identifier
+
+        # trusted private chats have the invited users marked as additional creators
+        if (
+            room_version.msc4289_creator_power_enabled
+            and config.get("preset", None) == RoomCreationPreset.TRUSTED_PRIVATE_CHAT
+            and len(config.get("invite", [])) > 0
+        ):
+            # the other user(s) are additional creators
+            invitees = config.get("invite", [])
+            # we don't want to replace any additional_creators additionally specified, and we want
+            # to remove duplicates.
+            creation_content[EventContentFields.ADDITIONAL_CREATORS] = list(
+                set(creation_content.get(EventContentFields.ADDITIONAL_CREATORS, []))
+                | set(invitees)
+            )
+
+        creation_event_with_context = None
+        if room_version.msc4291_room_ids_as_hashes:
+            creation_event_with_context = await self._generate_create_event_for_room_id(
+                requester,
+                creation_content,
+                is_public,
+                room_version,
+            )
+            (create_event, _) = creation_event_with_context
+            room_id = create_event.room_id
+        else:
+            room_id = await self._generate_and_create_room_id(
+                creator_id=user_id,
+                is_public=is_public,
+                room_version=room_version,
+            )
 
         # Check whether this visibility value is blocked by a third party module
         allowed_by_third_party_rules = await (
@@ -974,11 +1297,6 @@ class RoomCreationHandler:
         for val in raw_initial_state:
             initial_state[(val["type"], val.get("state_key", ""))] = val["content"]
 
-        creation_content = config.get("creation_content", {})
-
-        # override any attempt to set room versions via the creation_content
-        creation_content["room_version"] = room_version.identifier
-
         (
             last_stream_id,
             last_sent_event_id,
@@ -995,6 +1313,7 @@ class RoomCreationHandler:
             power_level_content_override=power_level_content_override,
             creator_join_profile=creator_join_profile,
             ignore_forced_encryption=ignore_forced_encryption,
+            creation_event_with_context=creation_event_with_context,
         )
 
         # we avoid dropping the lock between invites, as otherwise joins can
@@ -1060,6 +1379,38 @@ class RoomCreationHandler:
 
         return room_id, room_alias, last_stream_id
 
+    async def _generate_create_event_for_room_id(
+        self,
+        creator: Requester,
+        creation_content: JsonDict,
+        is_public: bool,
+        room_version: RoomVersion,
+    ) -> Tuple[EventBase, synapse.events.snapshot.EventContext]:
+        (
+            creation_event,
+            new_unpersisted_context,
+        ) = await self.event_creation_handler.create_event(
+            creator,
+            {
+                "content": creation_content,
+                "sender": creator.user.to_string(),
+                "type": EventTypes.Create,
+                "state_key": "",
+            },
+            prev_event_ids=[],
+            depth=1,
+            state_map={},
+            for_batch=False,
+        )
+        await self.store.store_room(
+            room_id=creation_event.room_id,
+            room_creator_user_id=creator.user.to_string(),
+            is_public=is_public,
+            room_version=room_version,
+        )
+        creation_context = await new_unpersisted_context.persist(creation_event)
+        return (creation_event, creation_context)
+
     async def _send_events_for_new_room(
         self,
         creator: Requester,
@@ -1073,6 +1424,9 @@ class RoomCreationHandler:
         power_level_content_override: Optional[JsonDict] = None,
         creator_join_profile: Optional[JsonDict] = None,
         ignore_forced_encryption: bool = False,
+        creation_event_with_context: Optional[
+            Tuple[EventBase, synapse.events.snapshot.EventContext]
+        ] = None,
     ) -> Tuple[int, str, int]:
         """Sends the initial events into a new room. Sends the room creation, membership,
         and power level events into the room sequentially, then creates and batches up the
@@ -1109,7 +1463,10 @@ class RoomCreationHandler:
                 user in this room.
             ignore_forced_encryption:
                 Ignore encryption forced by `encryption_enabled_by_default_for_room_type` setting.
-
+            creation_event_with_context:
+                Set in MSC4291 rooms where the create event determines the room ID. If provided,
+                does not create an additional create event but instead appends the remaining new
+                events onto the provided create event.
         Returns:
             A tuple containing the stream ID, event ID and depth of the last
             event sent to the room.
@@ -1174,13 +1531,26 @@ class RoomCreationHandler:
 
         preset_config, config = self._room_preset_config(room_config)
 
-        # MSC2175 removes the creator field from the create event.
-        if not room_version.implicit_room_creator:
-            creation_content["creator"] = creator_id
-        creation_event, unpersisted_creation_context = await create_event(
-            EventTypes.Create, creation_content, False
-        )
-        creation_context = await unpersisted_creation_context.persist(creation_event)
+        if creation_event_with_context is None:
+            # MSC2175 removes the creator field from the create event.
+            if not room_version.implicit_room_creator:
+                creation_content["creator"] = creator_id
+            creation_event, unpersisted_creation_context = await create_event(
+                EventTypes.Create, creation_content, False
+            )
+            creation_context = await unpersisted_creation_context.persist(
+                creation_event
+            )
+        else:
+            (creation_event, creation_context) = creation_event_with_context
+            # we had to do the above already in order to have a room ID, so just updates local vars
+            # and continue.
+            depth = 2
+            prev_event = [creation_event.event_id]
+            state_map[(creation_event.type, creation_event.state_key)] = (
+                creation_event.event_id
+            )
+
         logger.debug("Sending %s in new room", EventTypes.Member)
         ev = await self.event_creation_handler.handle_new_client_event(
             requester=creator,
@@ -1229,7 +1599,9 @@ class RoomCreationHandler:
             # Please update the docs for `default_power_level_content_override` when
             # updating the `events` dict below
             power_level_content: JsonDict = {
-                "users": {creator_id: 100},
+                "users": {creator_id: 100}
+                if not room_version.msc4289_creator_power_enabled
+                else {},
                 "users_default": 0,
                 "events": {
                     EventTypes.Name: 50,
@@ -1237,7 +1609,9 @@ class RoomCreationHandler:
                     EventTypes.RoomHistoryVisibility: 100,
                     EventTypes.CanonicalAlias: 50,
                     EventTypes.RoomAvatar: 50,
-                    EventTypes.Tombstone: 100,
+                    EventTypes.Tombstone: 150
+                    if room_version.msc4289_creator_power_enabled
+                    else 100,
                     EventTypes.ServerACL: 100,
                     EventTypes.RoomEncryption: 100,
                 },
@@ -1250,7 +1624,13 @@ class RoomCreationHandler:
                 "historical": 100,
             }
 
-            if config["original_invitees_have_ops"]:
+            # original_invitees_have_ops is set on preset:trusted_private_chat which will already
+            # have set these users as additional_creators, hence don't set the PL for creators as
+            # that is invalid.
+            if (
+                config["original_invitees_have_ops"]
+                and not room_version.msc4289_creator_power_enabled
+            ):
                 for invitee in invite_list:
                     power_level_content["users"][invitee] = 100
 
@@ -1423,6 +1803,19 @@ class RoomCreationHandler:
             )
         return preset_name, preset_config
 
+    def _remove_creators_from_pl_users_map(
+        self,
+        users_map: Dict[str, int],
+        creator: str,
+        additional_creators: Optional[List[str]],
+    ) -> None:
+        creators = [creator]
+        if additional_creators:
+            creators.extend(additional_creators)
+        for creator in creators:
+            # the creator(s) cannot be in the users map
+            users_map.pop(creator, None)
+
     def _generate_room_id(self) -> str:
         """Generates a random room ID.
 
@@ -1440,7 +1833,7 @@ class RoomCreationHandler:
             A random room ID of the form "!opaque_id:domain".
         """
         random_string = stringutils.random_string(18)
-        return RoomID(random_string, self.hs.hostname).to_string()
+        return RoomIdWithDomain(random_string, self.hs.hostname).to_string()
 
     async def _generate_and_create_room_id(
         self,

synapse/handlers/room_member.py

@@ -42,7 +42,7 @@ from synapse.api.errors import (
 )
 from synapse.api.ratelimiting import Ratelimiter
 from synapse.event_auth import get_named_level, get_power_level_event
-from synapse.events import EventBase
+from synapse.events import EventBase, is_creator
 from synapse.events.snapshot import EventContext
 from synapse.handlers.pagination import PURGE_ROOM_ACTION_NAME
 from synapse.handlers.profile import MAX_AVATAR_URL_LEN, MAX_DISPLAYNAME_LEN
@@ -1160,9 +1160,8 @@ class RoomMemberHandler(metaclass=abc.ABCMeta):
 
         elif effective_membership_state == Membership.KNOCK:
             if not is_host_in_room:
-                # The knock needs to be sent over federation instead
-                remote_room_hosts.append(get_domain_from_id(room_id))
-
+                # we used to add the domain of the room ID to remote_room_hosts.
+                # This is not safe in MSC4291 rooms which do not have a domain.
                 content["membership"] = Membership.KNOCK
 
                 try:
@@ -1921,7 +1920,7 @@ class RoomMemberMasterHandler(RoomMemberHandler):
             check_complexity
             and self.hs.config.server.limit_remote_rooms.admins_can_join
         ):
-            check_complexity = not await self.store.is_server_admin(user)
+            check_complexity = not await self.store.is_server_admin(user.to_string())
 
         if check_complexity:
             # Fetch the room complexity
@@ -2324,6 +2323,7 @@ def get_users_which_can_issue_invite(auth_events: StateMap[EventBase]) -> List[s
 
     # Check which members are able to invite by ensuring they're joined and have
     # the necessary power level.
+    create_event = auth_events[(EventTypes.Create, "")]
     for (event_type, state_key), event in auth_events.items():
         if event_type != EventTypes.Member:
             continue
@@ -2331,8 +2331,12 @@ def get_users_which_can_issue_invite(auth_events: StateMap[EventBase]) -> List[s
         if event.membership != Membership.JOIN:
             continue
 
+        if create_event.room_version.msc4289_creator_power_enabled and is_creator(
+            create_event, state_key
+        ):
+            result.append(state_key)
         # Check if the user has a custom power level.
-        if users.get(state_key, users_default_level) >= invite_level:
+        elif users.get(state_key, users_default_level) >= invite_level:
             result.append(state_key)
 
     return result

synapse/handlers/sliding_sync/__init__.py

@@ -116,7 +116,7 @@ class SlidingSyncHandler:
         sync_config: SlidingSyncConfig,
         from_token: Optional[SlidingSyncStreamToken] = None,
         timeout_ms: int = 0,
-    ) -> SlidingSyncResult:
+    ) -> Tuple[SlidingSyncResult, bool]:
         """
         Get the sync for a client if we have new data for it now. Otherwise
         wait for new data to arrive on the server. If the timeout expires, then
@@ -128,9 +128,16 @@ class SlidingSyncHandler:
             from_token: The point in the stream to sync from. Token of the end of the
                 previous batch. May be `None` if this is the initial sync request.
             timeout_ms: The time in milliseconds to wait for new data to arrive. If 0,
-                we will immediately but there might not be any new data so we just return an
-                empty response.
+                we will respond immediately but there might not be any new data so we just
+                return an empty response.
+
+        Returns:
+            A tuple containing the `SlidingSyncResult` and whether we waited for new
+            activity before responding. Knowing whether we waited is useful in traces
+            to filter out long-running requests where we were just waiting.
         """
+        did_wait = False
+
         # If the user is not part of the mau group, then check that limits have
         # not been exceeded (if not part of the group by this point, almost certain
         # auth_blocking will occur)
@@ -149,7 +156,7 @@ class SlidingSyncHandler:
                 logger.warning(
                     "Timed out waiting for worker to catch up. Returning empty response"
                 )
-                return SlidingSyncResult.empty(from_token)
+                return SlidingSyncResult.empty(from_token), did_wait
 
             # If we've spent significant time waiting to catch up, take it off
             # the timeout.
@@ -185,8 +192,9 @@ class SlidingSyncHandler:
                 current_sync_callback,
                 from_token=from_token.stream_token,
             )
+            did_wait = True
 
-        return result
+        return result, did_wait
 
     @trace
     async def current_sync_for_user(

synapse/http/request_metrics.py

@@ -164,11 +164,13 @@ def _get_in_flight_counts() -> Mapping[Tuple[str, ...], int]:
     return counts
 
 
-LaterGauge(
+in_flight_requests = LaterGauge(
     name="synapse_http_server_in_flight_requests_count",
     desc="",
     labelnames=["method", "servlet", SERVER_NAME_LABEL],
-    caller=_get_in_flight_counts,
+)
+in_flight_requests.register_hook(
+    homeserver_instance_id=None, hook=_get_in_flight_counts
 )
 
 

synapse/http/server.py

@@ -702,6 +702,10 @@ class _ByteProducer:
         self._request: Optional[Request] = request
         self._iterator = iterator
         self._paused = False
+        self.tracing_scope = start_active_span(
+            "write_bytes_to_request",
+        )
+        self.tracing_scope.__enter__()
 
         try:
             self._request.registerProducer(self, True)
@@ -712,8 +716,8 @@ class _ByteProducer:
             logger.info("Connection disconnected before response was written: %r", e)
 
             # We drop our references to data we'll not use.
-            self._request = None
             self._iterator = iter(())
+            self.tracing_scope.__exit__(type(e), None, e.__traceback__)
         else:
             # Start producing if `registerProducer` was successful
             self.resumeProducing()
@@ -727,6 +731,9 @@ class _ByteProducer:
         self._request.write(b"".join(data))
 
     def pauseProducing(self) -> None:
+        opentracing_span = active_span()
+        if opentracing_span is not None:
+            opentracing_span.log_kv({"event": "producer_paused"})
         self._paused = True
 
     def resumeProducing(self) -> None:
@@ -737,6 +744,10 @@ class _ByteProducer:
 
         self._paused = False
 
+        opentracing_span = active_span()
+        if opentracing_span is not None:
+            opentracing_span.log_kv({"event": "producer_resumed"})
+
         # Write until there's backpressure telling us to stop.
         while not self._paused:
             # Get the next chunk and write it to the request.
@@ -771,6 +782,7 @@ class _ByteProducer:
     def stopProducing(self) -> None:
         # Clear a circular reference.
         self._request = None
+        self.tracing_scope.__exit__(None, None, None)
 
 
 def _encode_json_bytes(json_object: object) -> bytes:
@@ -913,8 +925,9 @@ def _write_bytes_to_request(request: Request, bytes_to_write: bytes) -> None:
     # once (via `Request.write`) is that doing so starts the timeout for the
     # next request to be received: so if it takes longer than 60s to stream back
     # the response to the client, the client never gets it.
+    # c.f https://github.com/twisted/twisted/issues/12498
     #
-    # The correct solution is to use a Producer; then the timeout is only
+    # One workaround is to use a `Producer`; then the timeout is only
     # started once all of the content is sent over the TCP connection.
 
     # To make sure we don't write all of the bytes at once we split it up into

synapse/logging/context.py

@@ -56,7 +56,6 @@ from twisted.internet import defer, threads
 from twisted.python.threadpool import ThreadPool
 
 if TYPE_CHECKING:
-    from synapse.logging.scopecontextmanager import _LogContextScope
     from synapse.types import ISynapseReactor
 
 logger = logging.getLogger(__name__)
@@ -230,14 +229,13 @@ LoggingContextOrSentinel = Union["LoggingContext", "_Sentinel"]
 class _Sentinel:
     """Sentinel to represent the root context"""
 
-    __slots__ = ["previous_context", "finished", "request", "scope", "tag"]
+    __slots__ = ["previous_context", "finished", "request", "tag"]
 
     def __init__(self) -> None:
         # Minimal set for compatibility with LoggingContext
         self.previous_context = None
         self.finished = False
         self.request = None
-        self.scope = None
         self.tag = None
 
     def __str__(self) -> str:
@@ -290,7 +288,6 @@ class LoggingContext:
         "finished",
         "request",
         "tag",
-        "scope",
     ]
 
     def __init__(
@@ -311,7 +308,6 @@ class LoggingContext:
         self.main_thread = get_thread_id()
         self.request = None
         self.tag = ""
-        self.scope: Optional["_LogContextScope"] = None
 
         # keep track of whether we have hit the __exit__ block for this context
         # (suggesting that the the thing that created the context thinks it should
@@ -324,9 +320,6 @@ class LoggingContext:
             # we track the current request_id
             self.request = self.parent_context.request
 
-            # we also track the current scope:
-            self.scope = self.parent_context.scope
-
         if request is not None:
             # the request param overrides the request from the parent context
             self.request = request

synapse/logging/opentracing.py

@@ -251,18 +251,17 @@ class _DummyTagNames:
 try:
     import opentracing
     import opentracing.tags
+    from opentracing.scope_managers.contextvars import ContextVarsScopeManager
 
     tags = opentracing.tags
 except ImportError:
     opentracing = None  # type: ignore[assignment]
     tags = _DummyTagNames  # type: ignore[assignment]
+    ContextVarsScopeManager = None  # type: ignore
 try:
     from jaeger_client import Config as JaegerConfig
-
-    from synapse.logging.scopecontextmanager import LogContextScopeManager
 except ImportError:
     JaegerConfig = None  # type: ignore
-    LogContextScopeManager = None  # type: ignore
 
 
 try:
@@ -484,7 +483,7 @@ def init_tracer(hs: "HomeServer") -> None:
     config = JaegerConfig(
         config=jaeger_config,
         service_name=f"{hs.config.server.server_name} {instance_name_by_type}",
-        scope_manager=LogContextScopeManager(),
+        scope_manager=ContextVarsScopeManager(),
         metrics_factory=PrometheusMetricsFactory(),
     )
 

synapse/logging/scopecontextmanager.py

@@ -1,161 +0,0 @@
-#
-# This file is licensed under the Affero General Public License (AGPL) version 3.
-#
-# Copyright 2019 The Matrix.org Foundation C.I.C.
-# 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]
-#
-#
-
-import logging
-from typing import Optional
-
-from opentracing import Scope, ScopeManager, Span
-
-from synapse.logging.context import (
-    LoggingContext,
-    current_context,
-    nested_logging_context,
-)
-
-logger = logging.getLogger(__name__)
-
-
-class LogContextScopeManager(ScopeManager):
-    """
-    The LogContextScopeManager tracks the active scope in opentracing
-    by using the log contexts which are native to synapse. This is so
-    that the basic opentracing api can be used across twisted defereds.
-
-    It would be nice just to use opentracing's ContextVarsScopeManager,
-    but currently that doesn't work due to https://twistedmatrix.com/trac/ticket/10301.
-    """
-
-    def __init__(self) -> None:
-        pass
-
-    @property
-    def active(self) -> Optional[Scope]:
-        """
-        Returns the currently active Scope which can be used to access the
-        currently active Scope.span.
-        If there is a non-null Scope, its wrapped Span
-        becomes an implicit parent of any newly-created Span at
-        Tracer.start_active_span() time.
-
-        Return:
-            The Scope that is active, or None if not available.
-        """
-        ctx = current_context()
-        return ctx.scope
-
-    def activate(self, span: Span, finish_on_close: bool) -> Scope:
-        """
-        Makes a Span active.
-        Args
-            span: the span that should become active.
-            finish_on_close: whether Span should be automatically finished when
-                Scope.close() is called.
-
-        Returns:
-            Scope to control the end of the active period for
-            *span*. It is a programming error to neglect to call
-            Scope.close() on the returned instance.
-        """
-
-        ctx = current_context()
-
-        if not ctx:
-            logger.error("Tried to activate scope outside of loggingcontext")
-            return Scope(None, span)  # type: ignore[arg-type]
-
-        if ctx.scope is not None:
-            # start a new logging context as a child of the existing one.
-            # Doing so -- rather than updating the existing logcontext -- means that
-            # creating several concurrent spans under the same logcontext works
-            # correctly.
-            ctx = nested_logging_context("")
-            enter_logcontext = True
-        else:
-            # if there is no span currently associated with the current logcontext, we
-            # just store the scope in it.
-            #
-            # This feels a bit dubious, but it does hack around a problem where a
-            # span outlasts its parent logcontext (which would otherwise lead to
-            # "Re-starting finished log context" errors).
-            enter_logcontext = False
-
-        scope = _LogContextScope(self, span, ctx, enter_logcontext, finish_on_close)
-        ctx.scope = scope
-        if enter_logcontext:
-            ctx.__enter__()
-
-        return scope
-
-
-class _LogContextScope(Scope):
-    """
-    A custom opentracing scope, associated with a LogContext
-
-      * When the scope is closed, the logcontext's active scope is reset to None.
-        and - if enter_logcontext was set - the logcontext is finished too.
-    """
-
-    def __init__(
-        self,
-        manager: LogContextScopeManager,
-        span: Span,
-        logcontext: LoggingContext,
-        enter_logcontext: bool,
-        finish_on_close: bool,
-    ):
-        """
-        Args:
-            manager:
-                the manager that is responsible for this scope.
-            span:
-                the opentracing span which this scope represents the local
-                lifetime for.
-            logcontext:
-                the log context to which this scope is attached.
-            enter_logcontext:
-                if True the log context will be exited when the scope is finished
-            finish_on_close:
-                if True finish the span when the scope is closed
-        """
-        super().__init__(manager, span)
-        self.logcontext = logcontext
-        self._finish_on_close = finish_on_close
-        self._enter_logcontext = enter_logcontext
-
-    def __str__(self) -> str:
-        return f"Scope<{self.span}>"
-
-    def close(self) -> None:
-        active_scope = self.manager.active
-        if active_scope is not self:
-            logger.error(
-                "Closing scope %s which is not the currently-active one %s",
-                self,
-                active_scope,
-            )
-
-        if self._finish_on_close:
-            self.span.finish()
-
-        self.logcontext.scope = None
-
-        if self._enter_logcontext:
-            self.logcontext.__exit__(None, None, None)

synapse/metrics/__init__.py

@@ -73,8 +73,6 @@ logger = logging.getLogger(__name__)
 
 METRICS_PREFIX = "/_synapse/metrics"
 
-all_gauges: Dict[str, Collector] = {}
-
 HAVE_PROC_SELF_STAT = os.path.exists("/proc/self/stat")
 
 SERVER_NAME_LABEL = "server_name"
@@ -163,42 +161,110 @@ class LaterGauge(Collector):
     name: str
     desc: str
     labelnames: Optional[StrSequence] = attr.ib(hash=False)
-    # callback: should either return a value (if there are no labels for this metric),
-    # or dict mapping from a label tuple to a value
-    caller: Callable[
-        [], Union[Mapping[Tuple[str, ...], Union[int, float]], Union[int, float]]
-    ]
+    _instance_id_to_hook_map: Dict[
+        Optional[str],  # instance_id
+        Callable[
+            [], Union[Mapping[Tuple[str, ...], Union[int, float]], Union[int, float]]
+        ],
+    ] = attr.ib(factory=dict, hash=False)
+    """
+    Map from homeserver instance_id to a callback. Each callback should either return a
+    value (if there are no labels for this metric), or dict mapping from a label tuple
+    to a value.
+
+    We use `instance_id` instead of `server_name` because it's possible to have multiple
+    workers running in the same process with the same `server_name`.
+    """
 
     def collect(self) -> Iterable[Metric]:
         # The decision to add `SERVER_NAME_LABEL` is from the `LaterGauge` usage itself
         # (we don't enforce it here, one level up).
         g = GaugeMetricFamily(self.name, self.desc, labels=self.labelnames)  # type: ignore[missing-server-name-label]
 
-        try:
-            calls = self.caller()
-        except Exception:
-            logger.exception("Exception running callback for LaterGauge(%s)", self.name)
-            yield g
-            return
+        for homeserver_instance_id, hook in self._instance_id_to_hook_map.items():
+            try:
+                hook_result = hook()
+            except Exception:
+                logger.exception(
+                    "Exception running callback for LaterGauge(%s) for homeserver_instance_id=%s",
+                    self.name,
+                    homeserver_instance_id,
+                )
+                # Continue to return the rest of the metrics that aren't broken
+                continue
 
-        if isinstance(calls, (int, float)):
-            g.add_metric([], calls)
-        else:
-            for k, v in calls.items():
-                g.add_metric(k, v)
+            if isinstance(hook_result, (int, float)):
+                g.add_metric([], hook_result)
+            else:
+                for k, v in hook_result.items():
+                    g.add_metric(k, v)
 
         yield g
 
+    def register_hook(
+        self,
+        *,
+        homeserver_instance_id: Optional[str],
+        hook: Callable[
+            [], Union[Mapping[Tuple[str, ...], Union[int, float]], Union[int, float]]
+        ],
+    ) -> None:
+        """
+        Register a callback/hook that will be called to generate a metric samples for
+        the gauge.
+
+        Args:
+            homeserver_instance_id: The unique ID for this Synapse process instance
+                (`hs.get_instance_id()`) that this hook is associated with. This can be used
+                later to lookup all hooks associated with a given server name in order to
+                unregister them. This should only be omitted for global hooks that work
+                across all homeservers.
+            hook: A callback that should either return a value (if there are no
+                labels for this metric), or dict mapping from a label tuple to a value
+        """
+        # We shouldn't have multiple hooks registered for the same homeserver `instance_id`.
+        existing_hook = self._instance_id_to_hook_map.get(homeserver_instance_id)
+        assert existing_hook is None, (
+            f"LaterGauge(name={self.name}) hook already registered for homeserver_instance_id={homeserver_instance_id}. "
+            "This is likely a Synapse bug and you forgot to unregister the previous hooks for "
+            "the server (especially in tests)."
+        )
+
+        self._instance_id_to_hook_map[homeserver_instance_id] = hook
+
+    def unregister_hooks_for_homeserver_instance_id(
+        self, homeserver_instance_id: str
+    ) -> None:
+        """
+        Unregister all hooks associated with the given homeserver `instance_id`. This should be
+        called when a homeserver is shutdown to avoid extra hooks sitting around.
+
+        Args:
+            homeserver_instance_id: The unique ID for this Synapse process instance to
+                unregister hooks for (`hs.get_instance_id()`).
+        """
+        self._instance_id_to_hook_map.pop(homeserver_instance_id, None)
+
     def __attrs_post_init__(self) -> None:
-        self._register()
-
-    def _register(self) -> None:
-        if self.name in all_gauges.keys():
-            logger.warning("%s already registered, reregistering", self.name)
-            REGISTRY.unregister(all_gauges.pop(self.name))
-
         REGISTRY.register(self)
-        all_gauges[self.name] = self
+
+        # We shouldn't have multiple metrics with the same name. Typically, metrics
+        # should be created globally so you shouldn't be running into this and this will
+        # catch any stupid mistakes. The `REGISTRY.register(self)` call above will also
+        # raise an error if the metric already exists but to make things explicit, we'll
+        # also check here.
+        existing_gauge = all_later_gauges_to_clean_up_on_shutdown.get(self.name)
+        assert existing_gauge is None, f"LaterGauge(name={self.name}) already exists. "
+
+        # Keep track of the gauge so we can clean it up later.
+        all_later_gauges_to_clean_up_on_shutdown[self.name] = self
+
+
+all_later_gauges_to_clean_up_on_shutdown: Dict[str, LaterGauge] = {}
+"""
+Track all `LaterGauge` instances so we can remove any associated hooks during homeserver
+shutdown.
+"""
 
 
 # `MetricsEntry` only makes sense when it is a `Protocol`,
@@ -250,7 +316,7 @@ class InFlightGauge(Generic[MetricsEntry], Collector):
         # Protects access to _registrations
         self._lock = threading.Lock()
 
-        self._register_with_collector()
+        REGISTRY.register(self)
 
     def register(
         self,
@@ -341,14 +407,6 @@ class InFlightGauge(Generic[MetricsEntry], Collector):
                 gauge.add_metric(labels=key, value=getattr(metrics, name))
             yield gauge
 
-    def _register_with_collector(self) -> None:
-        if self.name in all_gauges.keys():
-            logger.warning("%s already registered, reregistering", self.name)
-            REGISTRY.unregister(all_gauges.pop(self.name))
-
-        REGISTRY.register(self)
-        all_gauges[self.name] = self
-
 
 class GaugeHistogramMetricFamilyWithLabels(GaugeHistogramMetricFamily):
     """

synapse/module_api/__init__.py

@@ -761,7 +761,7 @@ class ModuleApi:
         Returns:
             True if the user is a server admin, False otherwise.
         """
-        return await self._store.is_server_admin(UserID.from_string(user_id))
+        return await self._store.is_server_admin(user_id)
 
     async def set_user_admin(self, user_id: str, admin: bool) -> None:
         """Sets if a user is a server admin.

synapse/notifier.py

@@ -86,6 +86,24 @@ users_woken_by_stream_counter = Counter(
     labelnames=["stream", SERVER_NAME_LABEL],
 )
 
+
+notifier_listeners_gauge = LaterGauge(
+    name="synapse_notifier_listeners",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+
+notifier_rooms_gauge = LaterGauge(
+    name="synapse_notifier_rooms",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+notifier_users_gauge = LaterGauge(
+    name="synapse_notifier_users",
+    desc="",
+    labelnames=[SERVER_NAME_LABEL],
+)
+
 T = TypeVar("T")
 
 
@@ -281,28 +299,20 @@ class Notifier:
                 )
             }
 
-        LaterGauge(
-            name="synapse_notifier_listeners",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=count_listeners,
+        notifier_listeners_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(), hook=count_listeners
         )
-
-        LaterGauge(
-            name="synapse_notifier_rooms",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=lambda: {
+        notifier_rooms_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(),
+            hook=lambda: {
                 (self.server_name,): count(
                     bool, list(self.room_to_user_streams.values())
                 )
             },
         )
-        LaterGauge(
-            name="synapse_notifier_users",
-            desc="",
-            labelnames=[SERVER_NAME_LABEL],
-            caller=lambda: {(self.server_name,): len(self.user_to_user_stream)},
+        notifier_users_gauge.register_hook(
+            homeserver_instance_id=hs.get_instance_id(),
+            hook=lambda: {(self.server_name,): len(self.user_to_user_stream)},
         )
 
     def add_replication_callback(self, cb: Callable[[], None]) -> None: