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Redo coordinator's Substrate scanner

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Luke Parker
2024-12-31 10:37:19 -05:00
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# Serai Coordinate Substrate Scanner
This is the scanner of the Serai blockchain for the purposes of Serai's coordinator.
Two event streams are defined:
- Canonical events, which must be handled by every validator, regardless of the sets they're present
in. These are represented by `serai_processor_messages::substrate::CoordinatorMessage`.
- Ephemeral events, which only need to be handled by the validators present within the sets they
relate to. These are represented by two channels, `NewSet` and `SignSlashReport`.
The canonical event stream is available without provision of a validator's public key. The ephemeral
event stream requires provision of a validator's public key. Both are ordered within themselves, yet
there are no ordering guarantees across the two.