Wrap a notifier for prometheus metrics.

The channel which has V2* payloads.

The channel which has V3* payloads.

Wrapper around a Notifier which adds Prometheus metrics.

V2InvalidateRoom is emitted after a non-incremental state change to a room, in place of a V2Initialise payload.

V2StateRedaction is emitted when a timeline is seen that contains one or more redaction events targeting a piece of room state.

V2TransactionID is emitted by a poller when it sees an event with a transaction ID, or when it is certain that no other poller will see a transaction ID for this event (the "all-clear").

Listener represents the common functions required by all subscription listeners.

Notifier represents the common functions required by all notifiers.

V2Listener describes the messages that sync v2 pollers will publish.

V3Listener describes the messages that incoming sliding sync requests will publish.