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Update to spec v0.9.1 (#597)

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* Update to spec v0.9.0

* Update to v0.9.1

* Bump spec tags for v0.9.1

* Formatting, fix CI failures

* Resolve accidental KeyPair merge conflict

* Document new BeaconState functions

* Fix incorrect cache drops in `advance_caches`

* Update fork choice for v0.9.1

* Clean up some FIXMEs

* Fix a few docs/logs
This commit is contained in:
Michael Sproul
2019-11-21 11:47:30 +11:00
committed by GitHub
parent b7a0feb725
commit 24e941d175
105 changed files with 1211 additions and 2940 deletions
Download Patch File Download Diff File Expand all files Collapse all files

76
eth2/state_processing/src/per_epoch_processing.rs
View File

@@ -1,10 +1,7 @@
use crate::common::get_compact_committees_root;
use errors::EpochProcessingError as Error;
use std::collections::HashMap;
use tree_hash::TreeHash;
use types::*;
use validator_statuses::{TotalBalances, ValidatorStatuses};
use winning_root::{winning_root, WinningRoot};
pub mod apply_rewards;
pub mod errors;
@@ -12,23 +9,17 @@ pub mod process_slashings;
pub mod registry_updates;
pub mod tests;
pub mod validator_statuses;
pub mod winning_root;
pub use apply_rewards::process_rewards_and_penalties;
pub use process_slashings::process_slashings;
pub use registry_updates::process_registry_updates;
/// Maps a shard to a winning root.
///
/// It is generated during crosslink processing and later used to reward/penalize validators.
pub type WinningRootHashSet = HashMap<u64, WinningRoot>;
/// Performs per-epoch processing on some BeaconState.
///
/// Mutates the given `BeaconState`, returning early if an error is encountered. If an error is
/// returned, a state might be "half-processed" and therefore in an invalid state.
///
/// Spec v0.8.0
/// Spec v0.9.1
pub fn per_epoch_processing<T: EthSpec>(
state: &mut BeaconState<T>,
spec: &ChainSpec,
@@ -47,9 +38,6 @@ pub fn per_epoch_processing<T: EthSpec>(
// Justification and finalization.
process_justification_and_finalization(state, &validator_statuses.total_balances)?;
// Crosslinks.
process_crosslinks(state, spec)?;
// Rewards and Penalties.
process_rewards_and_penalties(state, &mut validator_statuses, spec)?;
@@ -78,7 +66,7 @@ pub fn per_epoch_processing<T: EthSpec>(
/// - `finalized_epoch`
/// - `finalized_root`
///
/// Spec v0.8.0
/// Spec v0.9.1
#[allow(clippy::if_same_then_else)] // For readability and consistency with spec.
pub fn process_justification_and_finalization<T: EthSpec>(
state: &mut BeaconState<T>,
@@ -144,47 +132,9 @@ pub fn process_justification_and_finalization<T: EthSpec>(
Ok(())
}
/// Updates the following fields on the `BeaconState`:
///
/// - `previous_crosslinks`
/// - `current_crosslinks`
///
/// Also returns a `WinningRootHashSet` for later use during epoch processing.
///
/// Spec v0.8.0
pub fn process_crosslinks<T: EthSpec>(
state: &mut BeaconState<T>,
spec: &ChainSpec,
) -> Result<(), Error> {
state.previous_crosslinks = state.current_crosslinks.clone();
for &relative_epoch in &[RelativeEpoch::Previous, RelativeEpoch::Current] {
let epoch = relative_epoch.into_epoch(state.current_epoch());
for offset in 0..state.get_committee_count(relative_epoch)? {
let shard =
(state.get_epoch_start_shard(relative_epoch)? + offset) % T::ShardCount::to_u64();
let crosslink_committee =
state.get_crosslink_committee_for_shard(shard, relative_epoch)?;
let winning_root = winning_root(state, shard, epoch, spec)?;
if let Some(winning_root) = winning_root {
let total_committee_balance =
state.get_total_balance(&crosslink_committee.committee, spec)?;
if 3 * winning_root.total_attesting_balance >= 2 * total_committee_balance {
state.current_crosslinks[shard as usize] = winning_root.crosslink.clone();
}
}
}
}
Ok(())
}
/// Finish up an epoch update.
///
/// Spec v0.8.0
/// Spec v0.9.1
pub fn process_final_updates<T: EthSpec>(
state: &mut BeaconState<T>,
spec: &ChainSpec,
@@ -211,23 +161,6 @@ pub fn process_final_updates<T: EthSpec>(
}
}
// Set active index root
let index_epoch = next_epoch + spec.activation_exit_delay;
let indices_list = VariableList::<usize, T::ValidatorRegistryLimit>::from(
state.get_active_validator_indices(index_epoch),
);
state.set_active_index_root(
index_epoch,
Hash256::from_slice(&indices_list.tree_hash_root()),
spec,
)?;
// Set committees root
state.set_compact_committee_root(
next_epoch,
get_compact_committees_root(state, RelativeEpoch::Next, spec)?,
)?;
// Reset slashings
state.set_slashings(next_epoch, 0)?;
@@ -242,9 +175,6 @@ pub fn process_final_updates<T: EthSpec>(
.push(Hash256::from_slice(&historical_batch.tree_hash_root()))?;
}
// Update start shard.
state.start_shard = state.get_epoch_start_shard(RelativeEpoch::Next)?;
// Rotate current/previous epoch attestations
state.previous_epoch_attestations =
std::mem::replace(&mut state.current_epoch_attestations, VariableList::empty());