reth_exex/event.rs
use alloy_eips::BlockNumHash;
/// Events emitted by an `ExEx`.
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum ExExEvent {
/// Highest block processed by the `ExEx`.
///
/// The `ExEx` must guarantee that it will not require all earlier blocks in the future,
/// meaning that Reth is allowed to prune them.
///
/// On reorgs, it's possible for the height to go down.
FinishedHeight(BlockNumHash),
}