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Update 0_beacon-chain.md

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vbuterin 2019-03-01 19:22:24 -06:00 committed by GitHub
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specs/core/0_beacon-chain.md
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@ -1958,12 +1958,8 @@ Note: When applying penalties in the following balance recalculations implemente
```python
def get_justification_and_finalization_deltas(state: BeaconState) -> Dict[ValidatorIndex, Gwei]:
previous_active_validator_indices = get_active_validator_indices(state.validator_registry, previous_epoch)
active_validator_indices = get_active_validator_indices(state.validator_registry, previous_epoch)
epochs_since_finality = get_current_epoch(state) + 1 - state.finalized_epoch
active_validator_indices = [
i for i in range(len(state.validator_registry)) if
is_active_validator(state.validator_registry[i], get_current_epoch(state) - 1)
]
# Initialize deltas that we are returning to zero
deltas = {index: 0 for index in range(len(state.validator_registry))}
# Some helper variables
@ -1980,7 +1976,7 @@ def get_justification_and_finalization_deltas(state: BeaconState) -> Dict[Valida
if epochs_since_finality <= 4:
for index in active_validator_indices:
# Expected FFG source
if index in get_attesting_indices(get_previous_epoch_attestations(state)):
if index in get_attesting_indices(get_previous_attestations(state)):
deltas[index] += get_base_reward(state, index) * total_attesting_balance // total_balance
# Inclusion speed bonus
deltas[index] += (
@ -2019,6 +2015,7 @@ def get_justification_and_finalization_deltas(state: BeaconState) -> Dict[Valida
deltas[index] -= get_inactivity_penalty(state, index, epochs_since_finality)
if index not in get_attesting_indices(matching_head_attestations):
deltas[index] -= get_base_reward(state, index)
# Penalize slashed-but-inactive validators as though they were active but offline
for index in range(len(state.validator_registry)):
if index not in active_validator_indices and state.validator_registry[index].slashed:
deltas[index] -= (
@ -2055,7 +2052,7 @@ def apply_rewards(state: BeaconState) -> None:
deltas1 = get_justification_and_finalization_deltas(state)
deltas2 = get_crosslink_deltas(state)
for i in range(len(state.validator_registry)):
state.validator_balances[i] += deltas1[i] + deltas2[i]
state.validator_balances[i] = max(0, state.validator_balances[i] + deltas1[i] + deltas2[i])
```
#### Ejections