Erik JohnstonandClaude Opus 5.5 e86fce4dea Calculate the state delta in Rust ...

Port `_get_new_state_after_events`, `_calculate_state_delta`,
`_is_server_still_joined` and the two steps that call them with the
extremity calculations, `_calculate_new_forward_extremities_and_state_delta`
and `_process_state_dag_forward_extremities_and_state_delta`, to
`rust/src/persist/state_delta.rs`. Reads go through a `StateDeltaReads`
trait on top of `ExtremityReads`, and state resolution through a
`StateResolver`, so the unit tests can fake both.

`NativeStateResolver` checks and bumps the input state groups as
`check_state_groups_and_bump_deletion` does, then resolves with the Rust
state resolution on the native pool, through `resolve_on_pool`, which is
split out of `StateResolutionHandler::start_converted`. The persister
shares the handler's conflict cache. There is no `_state_cache` of whole
resolutions. Rooms on state resolution v1 or without a chain cover index
fail with `StateResFallback`, for the caller to run the Python step.

`NewEvent` gains the fields the state delta reads from an event and its
context. `PersistReaderForTest` gains the five calculations, and
`test_persist_reader.py` compares each with the Python method on events
built by the event creation handler, including a resolved fork and an
MSC4242 room.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UHKYPSc37kWqGACn9aKxKL

2026-10-16 16:36:34 +00:00

..

benches

Add push rules for MSC4075: MatrixRTC invites and notifications (#20227)

2026-09-25 10:40:24 +00:00

src

Calculate the state delta in Rust

2026-10-16 16:36:34 +00:00

build.rs

resolves #19403 Report the rust compiler version used in the prometheus metrics (#19643)

2026-04-03 11:21:23 +02:00

Cargo.toml

Add a Rust federation agent

2026-10-15 14:54:15 +00:00

clippy.toml

Move per-homeserver Rust state into a RustRuntime object on the HomeServer (#20011)

2026-09-21 18:48:37 +01:00