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Remove FastBeaconState

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This commit is contained in:
Paul Hauner 2019-02-22 17:55:36 +13:00
parent b211e39331
commit cdc03f1749
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GPG Key ID: 303E4494BB28068C
3 changed files with 0 additions and 1266 deletions
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1136
eth2/types/src/fast_beacon_state.rs
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File diff suppressed because it is too large Load Diff

128
eth2/types/src/fast_beacon_state/committees_cache.rs
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@ -1,128 +0,0 @@
use crate::{
validator_registry::get_active_validator_indices, BeaconState, ChainSpec, Epoch, Hash256,
};
use honey_badger_split::SplitExt;
use serde_derive::Serialize;
use swap_or_not_shuffle::get_permutated_index;
pub const CACHED_EPOCHS: usize = 3;
#[derive(Debug, PartialEq, Clone, Default, Serialize)]
pub struct CommitteesCache {
cache_index_offset: usize,
active_validator_indices_cache: Vec<Option<Vec<usize>>>,
shuffling_cache: Vec<Option<Option<Vec<Vec<usize>>>>>,
previous_epoch: Epoch,
current_epoch: Epoch,
next_epoch: Epoch,
}
impl CommitteesCache {
pub fn new(current_epoch: Epoch, spec: &ChainSpec) -> Self {
let previous_epoch = if current_epoch == spec.genesis_epoch {
current_epoch
} else {
current_epoch - 1
};
let next_epoch = current_epoch + 1;
Self {
cache_index_offset: 0,
active_validator_indices_cache: vec![None; CACHED_EPOCHS],
shuffling_cache: vec![None; CACHED_EPOCHS],
previous_epoch,
current_epoch,
next_epoch,
}
}
pub fn advance_epoch(&mut self) {
let previous_cache_index = self.cache_index(self.previous_epoch);
self.active_validator_indices_cache[previous_cache_index] = None;
self.shuffling_cache[previous_cache_index] = None;
self.cache_index_offset += 1;
self.cache_index_offset %= CACHED_EPOCHS;
}
pub fn cache_index(&self, epoch: Epoch) -> usize {
let base_index = match epoch {
e if e == self.previous_epoch => 0,
e if e == self.current_epoch => 1,
e if e == self.next_epoch => 2,
_ => panic!("Bad cache index."),
};
(base_index + self.cache_index_offset) % CACHED_EPOCHS
}
pub fn get_active_validator_indices(
&mut self,
state: &BeaconState,
epoch: Epoch,
) -> &Vec<usize> {
let i = self.cache_index(epoch);
if self.active_validator_indices_cache[i] == None {
self.active_validator_indices_cache[i] = Some(get_active_validator_indices(
&state.validator_registry,
epoch,
));
}
self.active_validator_indices_cache[i]
.as_ref()
.expect("Cache cannot be None")
}
pub fn get_shuffling(
&mut self,
state: &BeaconState,
seed: Hash256,
epoch: Epoch,
spec: &ChainSpec,
) -> Option<&Vec<Vec<usize>>> {
let cache_index = self.cache_index(epoch);
if self.shuffling_cache[cache_index] == None {
let active_validator_indices = self.get_active_validator_indices(&state, epoch);
if active_validator_indices.is_empty() {
return None;
}
let committees_per_epoch =
state.get_epoch_committee_count(active_validator_indices.len(), spec);
let mut shuffled_active_validator_indices = vec![0; active_validator_indices.len()];
for &i in active_validator_indices {
let shuffled_i = get_permutated_index(
i,
active_validator_indices.len(),
&seed[..],
spec.shuffle_round_count,
)?;
shuffled_active_validator_indices[i] = active_validator_indices[shuffled_i]
}
let committees: Vec<Vec<usize>> = shuffled_active_validator_indices
.honey_badger_split(committees_per_epoch as usize)
.map(|slice: &[usize]| slice.to_vec())
.collect();
self.shuffling_cache[cache_index] = Some(Some(committees));
}
match self.shuffling_cache[cache_index] {
Some(_) => Some(
self.shuffling_cache[cache_index]
.as_ref()
.expect("Cache cannot be None")
.as_ref()
.expect("Shuffling cannot be None."),
),
None => None,
}
}
}

2
eth2/types/src/lib.rs
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@ -16,7 +16,6 @@ pub mod deposit_input;
pub mod eth1_data;
pub mod eth1_data_vote;
pub mod exit;
pub mod fast_beacon_state;
pub mod fork;
pub mod free_attestation;
pub mod pending_attestation;
@ -53,7 +52,6 @@ pub use crate::deposit_input::DepositInput;
pub use crate::eth1_data::Eth1Data;
pub use crate::eth1_data_vote::Eth1DataVote;
pub use crate::exit::Exit;
pub use crate::fast_beacon_state::FastBeaconState;
pub use crate::fork::Fork;
pub use crate::free_attestation::FreeAttestation;
pub use crate::pending_attestation::PendingAttestation;