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spec v0.6: check custody bitfield length

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This commit is contained in:
Michael Sproul 2019-06-04 11:04:53 +10:00
parent a3a941efdf
commit 10884359af
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1 changed files with 6 additions and 2 deletions
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8
eth2/state_processing/src/common/convert_to_indexed.rs
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@ -1,10 +1,10 @@
use super::get_attesting_indices;
use super::{get_attesting_indices, get_attesting_indices_unsorted};
use itertools::{Either, Itertools};
use types::*;
/// Convert `attestation` to (almost) indexed-verifiable form.
///
/// Spec v0.6.1
/// Spec v0.6.3
pub fn convert_to_indexed<T: EthSpec>(
state: &BeaconState<T>,
attestation: &Attestation,
@ -12,6 +12,10 @@ pub fn convert_to_indexed<T: EthSpec>(
let attesting_indices =
get_attesting_indices(state, &attestation.data, &attestation.aggregation_bitfield)?;
// We verify the custody bitfield by calling `get_attesting_indices_unsorted` and throwing
// away the result. This avoids double-sorting - the partition below takes care of the ordering.
get_attesting_indices_unsorted(state, &attestation.data, &attestation.custody_bitfield)?;
let (custody_bit_0_indices, custody_bit_1_indices) =
attesting_indices.into_iter().enumerate().partition_map(
|(committee_idx, validator_idx)| match attestation.custody_bitfield.get(committee_idx) {