Version: v0.3.10 Latest Latest

This package is not in the latest version of its module.

Go to latest
Published: Apr 7, 2020 License: GPL-3.0 Imports: 7 Imported by: 0



Package validators contains libraries to shuffle validators and retrieve active validator indices from a given slot or an attestation. It also provides helper functions to locate validator based on pubic key.



This section is empty.


This section is empty.


func ActivatedValidatorIndices

func ActivatedValidatorIndices(epoch uint64, validators []*ethpb.Validator) []uint64

ActivatedValidatorIndices determines the indices activated during the given epoch.

func EjectedValidatorIndices added in v0.3.5

func EjectedValidatorIndices(epoch uint64, validators []*ethpb.Validator, activeValidatorCount uint64) ([]uint64, error)

EjectedValidatorIndices determines the indices ejected during the given epoch.

func ExitedValidatorIndices

func ExitedValidatorIndices(epoch uint64, validators []*ethpb.Validator, activeValidatorCount uint64) ([]uint64, error)

ExitedValidatorIndices determines the indices exited during the current epoch.

func InitiateValidatorExit

func InitiateValidatorExit(state *stateTrie.BeaconState, idx uint64) (*stateTrie.BeaconState, error)

InitiateValidatorExit takes in validator index and updates validator with correct voluntary exit parameters.

Spec pseudocode definition:

def initiate_validator_exit(state: BeaconState, index: ValidatorIndex) -> None:
  Initiate the exit of the validator with index “index“.
  # Return if validator already initiated exit
  validator = state.validators[index]
  if validator.exit_epoch != FAR_FUTURE_EPOCH:

  # Compute exit queue epoch
  exit_epochs = [v.exit_epoch for v in state.validators if v.exit_epoch != FAR_FUTURE_EPOCH]
  exit_queue_epoch = max(exit_epochs + [compute_activation_exit_epoch(get_current_epoch(state))])
  exit_queue_churn = len([v for v in state.validators if v.exit_epoch == exit_queue_epoch])
  if exit_queue_churn >= get_validator_churn_limit(state):
      exit_queue_epoch += Epoch(1)

  # Set validator exit epoch and withdrawable epoch
  validator.exit_epoch = exit_queue_epoch
  validator.withdrawable_epoch = Epoch(validator.exit_epoch + MIN_VALIDATOR_WITHDRAWABILITY_DELAY)

func SlashValidator

func SlashValidator(state *stateTrie.BeaconState, slashedIdx uint64, whistleBlowerIdx uint64) (*stateTrie.BeaconState, error)

SlashValidator slashes the malicious validator's balance and awards the whistleblower's balance.

Spec pseudocode definition:

def slash_validator(state: BeaconState,
                  slashed_index: ValidatorIndex,
                  whistleblower_index: ValidatorIndex=None) -> None:
  Slash the validator with index “slashed_index“.
  epoch = get_current_epoch(state)
  initiate_validator_exit(state, slashed_index)
  validator = state.validators[slashed_index]
  validator.slashed = True
  validator.withdrawable_epoch = max(validator.withdrawable_epoch, Epoch(epoch + EPOCHS_PER_SLASHINGS_VECTOR))
  state.slashings[epoch % EPOCHS_PER_SLASHINGS_VECTOR] += validator.effective_balance
  decrease_balance(state, slashed_index, validator.effective_balance // MIN_SLASHING_PENALTY_QUOTIENT)

  # Apply proposer and whistleblower rewards
  proposer_index = get_beacon_proposer_index(state)
  if whistleblower_index is None:
  whistleblower_reward = Gwei(validator.effective_balance // WHISTLEBLOWER_REWARD_QUOTIENT)
  proposer_reward = Gwei(whistleblower_reward // PROPOSER_REWARD_QUOTIENT)
  increase_balance(state, proposer_index, proposer_reward)
  increase_balance(state, whistleblower_index, whistleblower_reward - proposer_reward)

func SlashedValidatorIndices

func SlashedValidatorIndices(epoch uint64, validators []*ethpb.Validator) []uint64

SlashedValidatorIndices determines the indices slashed during the given epoch.


This section is empty.

Source Files

Jump to

Keyboard shortcuts

? : This menu
/ : Search site
f or F : Jump to
t or T : Toggle theme light dark auto
y or Y : Canonical URL