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spec: top-level per-epoch processing v0.6.1

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This commit is contained in:
Michael Sproul
2019-05-14 15:00:18 +10:00
parent 894ecdd4ea
commit 79de966d3a
5 changed files with 53 additions and 123 deletions
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23
eth2/types/src/beacon_state.rs
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@@ -291,6 +291,16 @@ impl<T: EthSpec> BeaconState<T> {
spec.get_epoch_committee_count(active_validator_indices.len())
}
/// Return the number of shards to increment `state.latest_start_shard` during `epoch`.
///
/// Spec v0.6.1
pub fn get_shard_delta(&self, epoch: Epoch, spec: &ChainSpec) -> u64 {
std::cmp::min(
self.get_epoch_committee_count(epoch, spec),
T::ShardCount::to_u64() - T::ShardCount::to_u64() / spec.slots_per_epoch,
)
}
pub fn get_epoch_start_shard(&self, epoch: Epoch, spec: &ChainSpec) -> u64 {
drop((epoch, spec));
unimplemented!("FIXME(sproul) get_epoch_start_shard")
@@ -538,14 +548,13 @@ impl<T: EthSpec> BeaconState<T> {
/// Safely obtains the index for `latest_active_index_roots`, given some `epoch`.
///
/// Spec v0.5.1
/// Spec v0.6.1
fn get_active_index_root_index(&self, epoch: Epoch, spec: &ChainSpec) -> Result<usize, Error> {
let current_epoch = self.current_epoch(spec);
if (current_epoch - self.latest_active_index_roots.len() as u64
+ spec.activation_exit_delay
< epoch)
& (epoch <= current_epoch + spec.activation_exit_delay)
if current_epoch - self.latest_active_index_roots.len() as u64 + spec.activation_exit_delay
< epoch
&& epoch <= current_epoch + spec.activation_exit_delay
{
Ok(epoch.as_usize() % self.latest_active_index_roots.len())
} else {
@@ -555,7 +564,7 @@ impl<T: EthSpec> BeaconState<T> {
/// Return the `active_index_root` at a recent `epoch`.
///
/// Spec v0.5.1
/// Spec v0.6.1
pub fn get_active_index_root(&self, epoch: Epoch, spec: &ChainSpec) -> Result<Hash256, Error> {
let i = self.get_active_index_root_index(epoch, spec)?;
Ok(self.latest_active_index_roots[i])
@@ -563,7 +572,7 @@ impl<T: EthSpec> BeaconState<T> {
/// Set the `active_index_root` at a recent `epoch`.
///
/// Spec v0.5.1
/// Spec v0.6.1
pub fn set_active_index_root(
&mut self,
epoch: Epoch,