From e4bbcd333aa45b7b96d75f4f1f7ecd0e708d2480 Mon Sep 17 00:00:00 2001
From: Michael Sproul <michael@sigmaprime.io>
Date: Wed, 15 May 2019 13:18:15 +1000
Subject: [PATCH] state_processing: delete get_attestation_participants

---
 .../get_attestation_participants.rs           | 38 -------------------
 1 file changed, 38 deletions(-)
 delete mode 100644 eth2/state_processing/src/per_epoch_processing/get_attestation_participants.rs

diff --git a/eth2/state_processing/src/per_epoch_processing/get_attestation_participants.rs b/eth2/state_processing/src/per_epoch_processing/get_attestation_participants.rs
deleted file mode 100644
index 7f5504c56..000000000
--- a/eth2/state_processing/src/per_epoch_processing/get_attestation_participants.rs
+++ /dev/null
@@ -1,38 +0,0 @@
-use crate::common::verify_bitfield_length;
-use types::*;
-
-/// Returns validator indices which participated in the attestation.
-///
-/// Spec v0.5.1
-pub fn get_attestation_participants<T: EthSpec>(
-    state: &BeaconState<T>,
-    attestation_data: &AttestationData,
-    bitfield: &Bitfield,
-    spec: &ChainSpec,
-) -> Result<Vec<usize>, BeaconStateError> {
-    let epoch = attestation_data.slot.epoch(spec.slots_per_epoch);
-
-    let crosslink_committee =
-        state.get_crosslink_committee_for_shard(epoch, attestation_data.shard, spec)?;
-
-    if crosslink_committee.slot != attestation_data.slot {
-        return Err(BeaconStateError::NoCommitteeForShard);
-    }
-
-    let committee = &crosslink_committee.committee;
-
-    if !verify_bitfield_length(&bitfield, committee.len()) {
-        return Err(BeaconStateError::InvalidBitfield);
-    }
-
-    let mut participants = Vec::with_capacity(committee.len());
-    for (i, validator_index) in committee.iter().enumerate() {
-        match bitfield.get(i) {
-            Ok(bit) if bit => participants.push(*validator_index),
-            _ => {}
-        }
-    }
-    participants.shrink_to_fit();
-
-    Ok(participants)
-}