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Gloas ptc duties beacon node response (#8415)

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Co-Authored-By: shane-moore <skm1790@gmail.com>

Co-Authored-By: Eitan Seri-Levi <eserilev@ucsc.edu>

Co-Authored-By: Eitan Seri-Levi <eserilev@gmail.com>

Co-Authored-By: dapplion <35266934+dapplion@users.noreply.github.com>
This commit is contained in:
Shane K Moore
2026-04-26 08:25:00 -07:00
committed by GitHub
parent 276c4d5ff3
commit fae7941b2d
6 changed files with 411 additions and 4 deletions
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44
beacon_node/beacon_chain/src/beacon_chain.rs
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@@ -84,8 +84,8 @@ use crate::{
use bls::{PublicKey, PublicKeyBytes, Signature};
use eth2::beacon_response::ForkVersionedResponse;
use eth2::types::{
EventKind, SseBlobSidecar, SseBlock, SseDataColumnSidecar, SseExtendedPayloadAttributes,
SseHead,
EventKind, PtcDuty, SseBlobSidecar, SseBlock, SseDataColumnSidecar,
SseExtendedPayloadAttributes, SseHead,
};
use execution_layer::{
BlockProposalContents, BlockProposalContentsType, BuilderParams, ChainHealth, ExecutionLayer,
@@ -1719,6 +1719,46 @@ impl<T: BeaconChainTypes> BeaconChain<T> {
Ok((duties, dependent_root, execution_status))
}
/// Get PTC duties for validators at a given epoch.
///
/// TODO(gloas): per-validator `get_ptc_assignment` makes this O(N * slots_per_epoch * PTCSize).
/// A future ptc cache (or a single-pass `ptc_window` walk) can drop this to
/// O(slots_per_epoch * PTCSize + N).
pub fn compute_ptc_duties(
&self,
state: &BeaconState<T::EthSpec>,
epoch: Epoch,
validator_indices: &[u64],
dependent_block_root: Hash256,
) -> Result<(Vec<Option<PtcDuty>>, Hash256), Error> {
// The ptc_window only covers previous, current, and next epochs.
let relative_epoch = RelativeEpoch::from_epoch(state.current_epoch(), epoch)
.map_err(Error::IncorrectStateForAttestation)?;
let dependent_root =
state.attester_shuffling_decision_root(dependent_block_root, relative_epoch)?;
let pubkey_cache = self.validator_pubkey_cache.read();
let duties = validator_indices
.iter()
.map(|&validator_index| -> Result<Option<PtcDuty>, Error> {
let Some(&pubkey) = pubkey_cache.get_pubkey_bytes(validator_index as usize) else {
return Ok(None);
};
let slot_opt =
state.get_ptc_assignment(validator_index as usize, epoch, &self.spec)?;
Ok(slot_opt.map(|slot| PtcDuty {
validator_index,
slot,
pubkey,
}))
})
.collect::<Result<Vec<_>, _>>()?;
Ok((duties, dependent_root))
}
pub fn get_aggregated_attestation(
&self,
attestation: AttestationRef<T::EthSpec>,