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feat: implemented the kzg_commitment_to_versioned_hash function #112

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merged 2 commits into from
Feb 21, 2025
Merged

feat: implemented the kzg_commitment_to_versioned_hash function #112

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48b5741
feat: implemented the kzg_commitment_to_versioned_hash function
Kayden-ML Feb 19, 2025
598acc8
fix: fixed requested changes
Kayden-ML Feb 19, 2025
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8 changes: 8 additions & 0 deletions crates/common/consensus/src/deneb/beacon_state.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -10,6 +10,7 @@ use anyhow::{anyhow, bail, ensure};
use blst::min_pk::{AggregatePublicKey, PublicKey};
use ethereum_hashing::{hash, hash_fixed};
use itertools::Itertools;
use kzg::eth::c_bindings::KZGCommitment;
use serde::{Deserialize, Serialize};
use ssz_derive::{Decode, Encode};
use ssz_types::{
Expand Down Expand Up @@ -61,6 +62,7 @@ use crate::{
helpers::xor,
historical_summary::HistoricalSummary,
indexed_attestation::IndexedAttestation,
kzg_commitment::VERSIONED_HASH_VERSION_KZG,
misc::{
compute_activation_exit_epoch, compute_committee, compute_domain, compute_epoch_at_slot,
compute_shuffled_index, compute_signing_root, compute_start_slot_at_epoch,
Expand Down Expand Up @@ -1800,3 +1802,9 @@ pub fn eth_aggregate_pubkeys(pubkeys: &[&PubKey]) -> anyhow::Result<PublicKey> {
.map_err(|err| anyhow!("Failed to aggregate and validate public keys {err:?}"))?;
Ok(aggregate_public_key.to_public_key())
}

pub fn kzg_commitment_to_versioned_hash(kzg_commitment: &KZGCommitment) -> B256 {
let mut versioned_hash = hash(&kzg_commitment.bytes);
versioned_hash[0] = VERSIONED_HASH_VERSION_KZG;
B256::from_slice(&versioned_hash)
}