State-reset and security mitigations.

Upgrade Ruma to present.

The following are intentionally benign for activation in a later commit:

- Hydra backports not default.
- Room version 12 not default.
- Room version 12 not listed as stable.

Do not enable them manually or you can brick your database.

Signed-off-by: Jason Volk <jason@zemos.net>

src/core/matrix/event/id.rs

@@ -1,7 +1,7 @@
 use ruma::{CanonicalJsonObject, OwnedEventId, RoomVersionId};
 use serde_json::value::RawValue as RawJsonValue;
 
-use crate::{Result, err};
+use crate::{Result, err, matrix::room_version};
 
 /// Generates a correct eventId for the incoming pdu.
 ///
@@ -24,8 +24,8 @@ pub fn gen_event_id(
 	value: &CanonicalJsonObject,
 	room_version_id: &RoomVersionId,
 ) -> Result<OwnedEventId> {
-	let reference_hash = ruma::signatures::reference_hash(value, room_version_id)?;
-	let event_id: OwnedEventId = format!("${reference_hash}").try_into()?;
+	let room_version_rules = room_version::rules(room_version_id)?;
+	let reference_hash = ruma::signatures::reference_hash(value, &room_version_rules)?;
 
-	Ok(event_id)
+	OwnedEventId::from_parts('$', &reference_hash, None).map_err(Into::into)
 }