lighthouse/consensus/state_processing/src/common/get_attesting_indices.rs
Paul Hauner 4331834003
Directory Restructure (#1163)
* Move tests -> testing

* Directory restructure

* Update Cargo.toml during restructure

* Update Makefile during restructure

* Fix arbitrary path
2020-05-18 21:24:23 +10:00

26 lines
682 B
Rust

use types::*;
/// Returns validator indices which participated in the attestation, sorted by increasing index.
///
/// Spec v0.11.1
pub fn get_attesting_indices<T: EthSpec>(
committee: &[usize],
bitlist: &BitList<T::MaxValidatorsPerCommittee>,
) -> Result<Vec<usize>, BeaconStateError> {
if bitlist.len() != committee.len() {
return Err(BeaconStateError::InvalidBitfield);
}
let mut indices = Vec::with_capacity(bitlist.num_set_bits());
for (i, validator_index) in committee.iter().enumerate() {
if let Ok(true) = bitlist.get(i) {
indices.push(*validator_index)
}
}
indices.sort_unstable();
Ok(indices)
}