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Code Issues Packages Projects Releases Wiki Activity

Make Individual Validators Immutable (#8397)

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* initial POC

* clean up

Co-authored-by: Raul Jordan <raul@prysmaticlabs.com>
Co-authored-by: prylabs-bulldozer[bot] <58059840+prylabs-bulldozer[bot]@users.noreply.github.com>
This commit is contained in:
Nishant Das
2021-02-11 04:52:45 +08:00
committed by GitHub
parent d3e93dd106
commit 143cb142bc
5 changed files with 79 additions and 26 deletions
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25
beacon-chain/core/epoch/epoch_processing.go
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@@ -175,17 +175,17 @@ func ProcessSlashings(state *stateTrie.BeaconState) (*stateTrie.BeaconState, err
// below equally.
increment := params.BeaconConfig().EffectiveBalanceIncrement
minSlashing := mathutil.Min(totalSlashing*params.BeaconConfig().ProportionalSlashingMultiplier, totalBalance)
err = state.ApplyToEveryValidator(func(idx int, val *ethpb.Validator) (bool, error) {
err = state.ApplyToEveryValidator(func(idx int, val *ethpb.Validator) (bool, *ethpb.Validator, error) {
correctEpoch := (currentEpoch + exitLength/2) == val.WithdrawableEpoch
if val.Slashed && correctEpoch {
penaltyNumerator := val.EffectiveBalance / increment * minSlashing
penalty := penaltyNumerator / totalBalance * increment
if err := helpers.DecreaseBalance(state, uint64(idx), penalty); err != nil {
return false, err
return false, val, err
}
return true, nil
return true, val, nil
}
return false, nil
return false, val, nil
})
return state, err
}
@@ -249,23 +249,24 @@ func ProcessFinalUpdates(state *stateTrie.BeaconState) (*stateTrie.BeaconState,
bals := state.Balances()
// Update effective balances with hysteresis.
validatorFunc := func(idx int, val *ethpb.Validator) (bool, error) {
validatorFunc := func(idx int, val *ethpb.Validator) (bool, *ethpb.Validator, error) {
if val == nil {
return false, fmt.Errorf("validator %d is nil in state", idx)
return false, nil, fmt.Errorf("validator %d is nil in state", idx)
}
if idx >= len(bals) {
return false, fmt.Errorf("validator index exceeds validator length in state %d >= %d", idx, len(state.Balances()))
return false, nil, fmt.Errorf("validator index exceeds validator length in state %d >= %d", idx, len(state.Balances()))
}
balance := bals[idx]
if balance+downwardThreshold < val.EffectiveBalance || val.EffectiveBalance+upwardThreshold < balance {
val.EffectiveBalance = maxEffBalance
if val.EffectiveBalance > balance-balance%effBalanceInc {
val.EffectiveBalance = balance - balance%effBalanceInc
newVal := stateTrie.CopyValidator(val)
newVal.EffectiveBalance = maxEffBalance
if newVal.EffectiveBalance > balance-balance%effBalanceInc {
newVal.EffectiveBalance = balance - balance%effBalanceInc
}
return true, nil
return true, newVal, nil
}
return false, nil
return false, val, nil
}
if err := state.ApplyToEveryValidator(validatorFunc); err != nil {