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Emit NewHead SSE event earlier in block import (#8718)

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Co-Authored-By: Jimmy Chen <jchen.tc@gmail.com>
This commit is contained in:
Jimmy Chen
2026-01-29 18:39:05 +11:00
committed by GitHub
parent 119dc565a1
commit cd8049a696
4 changed files with 107 additions and 38 deletions
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38
beacon_node/beacon_chain/src/canonical_head.rs
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@@ -41,7 +41,7 @@ use crate::{
metrics,
validator_monitor::get_slot_delay_ms,
};
use eth2::types::{EventKind, SseChainReorg, SseFinalizedCheckpoint, SseHead, SseLateHead};
use eth2::types::{EventKind, SseChainReorg, SseFinalizedCheckpoint, SseLateHead};
use fork_choice::{
ExecutionStatus, ForkChoiceStore, ForkChoiceView, ForkchoiceUpdateParameters, ProtoBlock,
ResetPayloadStatuses,
@@ -824,15 +824,8 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
.slot()
.epoch(T::EthSpec::slots_per_epoch());
// These fields are used for server-sent events.
let state_root = new_snapshot.beacon_state_root();
// This field is used for server-sent events.
let head_slot = new_snapshot.beacon_state.slot();
let dependent_root = new_snapshot
.beacon_state
.attester_shuffling_decision_root(self.genesis_block_root, RelativeEpoch::Next);
let prev_dependent_root = new_snapshot
.beacon_state
.attester_shuffling_decision_root(self.genesis_block_root, RelativeEpoch::Current);
match BlockShufflingIds::try_from_head(
new_snapshot.beacon_block_root,
@@ -870,33 +863,6 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
self.op_pool.prune_attestations(self.epoch()?);
}
// Register server-sent-events for a new head.
if let Some(event_handler) = self
.event_handler
.as_ref()
.filter(|handler| handler.has_head_subscribers())
{
match (dependent_root, prev_dependent_root) {
(Ok(current_duty_dependent_root), Ok(previous_duty_dependent_root)) => {
event_handler.register(EventKind::Head(SseHead {
slot: head_slot,
block: new_snapshot.beacon_block_root,
state: state_root,
current_duty_dependent_root,
previous_duty_dependent_root,
epoch_transition: is_epoch_transition,
execution_optimistic: new_head_is_optimistic,
}));
}
(Err(e), _) | (_, Err(e)) => {
warn!(
error = ?e,
"Unable to find dependent roots, cannot register head event"
);
}
}
}
// Register a server-sent-event for a reorg (if necessary).
if let Some(depth) = reorg_distance
&& let Some(event_handler) = self