63 lines
1.8 KiB
Rust
63 lines
1.8 KiB
Rust
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use crate::common::exit_validator;
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use types::{BeaconStateError as Error, *};
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/// Slash the validator with index ``index``.
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///
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/// Spec v0.5.0
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pub fn slash_validator(
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state: &mut BeaconState,
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validator_index: usize,
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spec: &ChainSpec,
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) -> Result<(), Error> {
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let current_epoch = state.current_epoch(spec);
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if (validator_index >= state.validator_registry.len())
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| (validator_index >= state.validator_balances.len())
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{
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return Err(BeaconStateError::UnknownValidator);
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}
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let validator = &state.validator_registry[validator_index];
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let effective_balance = state.get_effective_balance(validator_index, spec)?;
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// A validator that is withdrawn cannot be slashed.
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//
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// This constraint will be lifted in Phase 0.
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if state.slot
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>= validator
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.withdrawable_epoch
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.start_slot(spec.slots_per_epoch)
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{
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return Err(Error::ValidatorIsWithdrawable);
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}
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exit_validator(state, validator_index, spec)?;
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state.set_slashed_balance(
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current_epoch,
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state.get_slashed_balance(current_epoch, spec)? + effective_balance,
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spec,
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)?;
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let whistleblower_index =
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state.get_beacon_proposer_index(state.slot, RelativeEpoch::Current, spec)?;
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let whistleblower_reward = effective_balance / spec.whistleblower_reward_quotient;
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safe_add_assign!(
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state.validator_balances[whistleblower_index as usize],
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whistleblower_reward
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);
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safe_sub_assign!(
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state.validator_balances[validator_index],
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whistleblower_reward
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);
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state.validator_registry[validator_index].slashed = true;
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state.validator_registry[validator_index].withdrawable_epoch =
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current_epoch + Epoch::from(spec.latest_slashed_exit_length);
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Ok(())
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}
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