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Altair consensus changes and refactors (#2279)

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## Proposed Changes

Implement the consensus changes necessary for the upcoming Altair hard fork.

## Additional Info

This is quite a heavy refactor, with pivotal types like the `BeaconState` and `BeaconBlock` changing from structs to enums. This ripples through the whole codebase with field accesses changing to methods, e.g. `state.slot` => `state.slot()`.


Co-authored-by: realbigsean <seananderson33@gmail.com>
This commit is contained in:
Michael Sproul
2021-07-09 06:15:32 +00:00
parent 89361573d4
commit b4689e20c6
271 changed files with 9652 additions and 8444 deletions
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46
consensus/state_processing/src/common/slash_validator.rs
View File

@@ -1,55 +1,61 @@
use crate::common::{decrease_balance, increase_balance, initiate_validator_exit};
use safe_arith::SafeArith;
use std::cmp;
use types::{BeaconStateError as Error, *};
use types::{
consts::altair::{PROPOSER_WEIGHT, WEIGHT_DENOMINATOR},
BeaconStateError as Error, *,
};
/// Slash the validator with index ``index``.
///
/// Spec v0.12.1
/// Slash the validator with index `slashed_index`.
pub fn slash_validator<T: EthSpec>(
state: &mut BeaconState<T>,
slashed_index: usize,
opt_whistleblower_index: Option<usize>,
spec: &ChainSpec,
) -> Result<(), Error> {
if slashed_index >= state.validators.len() || slashed_index >= state.balances.len() {
return Err(BeaconStateError::UnknownValidator(slashed_index as u64));
}
let epoch = state.current_epoch();
initiate_validator_exit(state, slashed_index, spec)?;
state.validators[slashed_index].slashed = true;
state.validators[slashed_index].withdrawable_epoch = cmp::max(
state.validators[slashed_index].withdrawable_epoch,
let validator = state.get_validator_mut(slashed_index)?;
validator.slashed = true;
validator.withdrawable_epoch = cmp::max(
validator.withdrawable_epoch,
epoch.safe_add(T::EpochsPerSlashingsVector::to_u64())?,
);
let validator_effective_balance = state.get_effective_balance(slashed_index, spec)?;
let validator_effective_balance = validator.effective_balance;
state.set_slashings(
epoch,
state
.get_slashings(epoch)?
.safe_add(validator_effective_balance)?,
)?;
let min_slashing_penalty_quotient = match state {
BeaconState::Base(_) => spec.min_slashing_penalty_quotient,
BeaconState::Altair(_) => spec.min_slashing_penalty_quotient_altair,
};
decrease_balance(
state,
slashed_index,
validator_effective_balance.safe_div(spec.min_slashing_penalty_quotient)?,
);
validator_effective_balance.safe_div(min_slashing_penalty_quotient)?,
)?;
// Apply proposer and whistleblower rewards
let proposer_index = state.get_beacon_proposer_index(state.slot, spec)?;
let proposer_index = state.get_beacon_proposer_index(state.slot(), spec)?;
let whistleblower_index = opt_whistleblower_index.unwrap_or(proposer_index);
let whistleblower_reward =
validator_effective_balance.safe_div(spec.whistleblower_reward_quotient)?;
let proposer_reward = whistleblower_reward.safe_div(spec.proposer_reward_quotient)?;
let proposer_reward = match state {
BeaconState::Base(_) => whistleblower_reward.safe_div(spec.proposer_reward_quotient)?,
BeaconState::Altair(_) => whistleblower_reward
.safe_mul(PROPOSER_WEIGHT)?
.safe_div(WEIGHT_DENOMINATOR)?,
};
// Ensure the whistleblower index is in the validator registry.
if state.validators.get(whistleblower_index).is_none() {
return Err(BeaconStateError::UnknownValidator(
whistleblower_index as u64,
));
if state.validators().get(whistleblower_index).is_none() {
return Err(BeaconStateError::UnknownValidator(whistleblower_index));
}
increase_balance(state, proposer_index, proposer_reward)?;