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Update Electra penalty computation. EIP7125 #8612

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Update Electra penalty computation. EIP7125 #8612

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dfb92fa
Update Electra penalty computation.
david-ry4n Sep 18, 2024
3f90ab3
Fixing a nit. :)
david-ry4n Sep 20, 2024
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38 changes: 38 additions & 0 deletions ...pegasys/teku/spec/logic/versions/electra/statetransition/epoch/EpochProcessorElectra.java
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Original file line number Diff line number Diff line change
Expand Up @@ -13,6 +13,7 @@

package tech.pegasys.teku.spec.logic.versions.electra.statetransition.epoch;

import static tech.pegasys.teku.infrastructure.unsigned.UInt64.ZERO;
import static tech.pegasys.teku.spec.config.SpecConfig.FAR_FUTURE_EPOCH;

import java.util.ArrayList;
Expand All @@ -34,6 +35,7 @@
import tech.pegasys.teku.spec.logic.common.helpers.BeaconStateMutators;
import tech.pegasys.teku.spec.logic.common.statetransition.epoch.status.ValidatorStatus;
import tech.pegasys.teku.spec.logic.common.statetransition.epoch.status.ValidatorStatusFactory;
import tech.pegasys.teku.spec.logic.common.statetransition.epoch.status.ValidatorStatuses;
import tech.pegasys.teku.spec.logic.common.statetransition.exceptions.EpochProcessingException;
import tech.pegasys.teku.spec.logic.common.util.BeaconStateUtil;
import tech.pegasys.teku.spec.logic.common.util.ValidatorsUtil;
Expand Down Expand Up @@ -297,4 +299,40 @@ public void processPendingConsolidations(final MutableBeaconState state) {
schemaDefinitionsElectra.getPendingConsolidationsSchema().createFromElements(newList));
}
}

/** Processes slashings */
@Override
public void processSlashings(
final MutableBeaconState state, final ValidatorStatuses validatorStatuses) {
final UInt64 totalBalance =
validatorStatuses.getTotalBalances().getCurrentEpochActiveValidators();
final UInt64 epoch = beaconStateAccessors.getCurrentEpoch(state);
final UInt64 adjustedTotalSlashingBalance =
state
.getSlashings()
.streamUnboxed()
.reduce(ZERO, UInt64::plus)
.times(getProportionalSlashingMultiplier())
.min(totalBalance);

final List<ValidatorStatus> validatorStatusList = validatorStatuses.getStatuses();
final int halfEpochsPerSlashingsVector = specConfig.getEpochsPerSlashingsVector() / 2;

final UInt64 increment = specConfig.getEffectiveBalanceIncrement();
final UInt64 penaltyPerEffectiveBalanceIncrement =
adjustedTotalSlashingBalance.dividedBy(totalBalance.dividedBy(increment));
for (int index = 0; index < validatorStatusList.size(); index++) {
final ValidatorStatus status = validatorStatusList.get(index);
if (status.isSlashed()
&& epoch.plus(halfEpochsPerSlashingsVector).equals(status.getWithdrawableEpoch())) {

// EIP7251
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final UInt64 effectiveBalanceIncrements =
status.getCurrentEpochEffectiveBalance().dividedBy(increment);
final UInt64 penalty =
penaltyPerEffectiveBalanceIncrement.times(effectiveBalanceIncrements);
beaconStateMutators.decreaseBalance(state, index, penalty);
}
}
}
}