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@ -0,0 +1,116 @@
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specs/core/0_beacon-chain.md
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@ -231,6 +231,7 @@ Code snippets appearing in `this style` are to be interpreted as Python code.
| `EPOCHS_PER_ETH1_VOTING_PERIOD` | `2**4` (= 16) | epochs | ~1.7 hours |
| `SLOTS_PER_HISTORICAL_ROOT` | `2**13` (= 8,192) | slots | ~13 hours |
| `MIN_VALIDATOR_WITHDRAWABILITY_DELAY` | `2**8` (= 256) | epochs | ~27 hours |
| `PERSISTENT_COMMITTEE_PERIOD` | `2**11` (= 2,048) | epochs | 9 days |
### State list lengths
@ -1877,8 +1878,7 @@ def get_base_reward(state: BeaconState, index: ValidatorIndex) -> Gwei:
```
```python
def get_inactivity_penalty(state: BeaconState, index: ValidatorIndex) -> Gwei:
epochs_since_finality = get_current_epoch(state) + 1 - state.finalized_epoch
def get_inactivity_penalty(state: BeaconState, index: ValidatorIndex, epochs_since_finality: int) -> Gwei:
return (
get_base_reward(state, index) +
get_effective_balance(state, index) * epochs_since_finality // INACTIVITY_PENALTY_QUOTIENT // 2
@ -1938,6 +1938,7 @@ def compute_normal_justification_and_finalization_deltas(state: BeaconState) ->
else:
deltas[1][index] += get_base_reward(state, index)
# Proposer bonus
if index in get_attesting_indices(state, state.previous_epoch_attestations):
proposer_index = get_beacon_proposer_index(state, inclusion_slot(state, index))
deltas[0][proposer_index] += get_base_reward(state, index) // ATTESTATION_INCLUSION_REWARD_QUOTIENT
return deltas
@ -2299,8 +2300,8 @@ def process_proposer_slashing(state: BeaconState,
Note that this function mutates ``state``.
"""
proposer = state.validator_registry[proposer_slashing.proposer_index]
# Verify that the slot is the same
assert proposer_slashing.header_1.slot == proposer_slashing.header_2.slot
# Verify that the epoch is the same
assert slot_to_epoch(proposer_slashing.header_1.slot) == slot_to_epoch(proposer_slashing.header_2.slot)
# But the headers are different
assert proposer_slashing.header_1 != proposer_slashing.header_2
# Proposer is not yet slashed
@ -2365,7 +2366,7 @@ def process_attestation(state: BeaconState, attestation: Attestation) -> None:
"""
# Can't submit attestations that are too far in history (or in prehistory)
assert attestation.data.slot >= GENESIS_SLOT
assert state.slot < attestation.data.slot + SLOTS_PER_EPOCH
assert state.slot <= attestation.data.slot + SLOTS_PER_EPOCH
# Can't submit attestations too quickly
assert attestation.data.slot + MIN_ATTESTATION_INCLUSION_DELAY <= state.slot
# Verify that the justified epoch is correct, case 1: current epoch attestations
@ -2448,16 +2449,20 @@ Verify that `len(block.body.voluntary_exits) <= MAX_VOLUNTARY_EXITS`.
For each `exit` in `block.body.voluntary_exits`, run the following function:
```python
def process_exit(state: BeaconState, exit: VoluntaryExit) -> None:
def process_voluntary_exit(state: BeaconState, exit: VoluntaryExit) -> None:
"""
Process ``VoluntaryExit`` transaction.
Note that this function mutates ``state``.
"""
validator = state.validator_registry[exit.validator_index]
# Verify the validator has not yet exited
assert validator.exit_epoch > get_delayed_activation_exit_epoch(get_current_epoch(state))
assert validator.exit_epoch == FAR_FUTURE_EPOCH
# Verify the validator has not initiated an exit
assert validator.initiated_exit is False
# Exits must specify an epoch when they become valid; they are not valid before then
assert get_current_epoch(state) >= exit.epoch
# Must have been in the validator set long enough
assert get_current_epoch(state) - validator.activation_epoch >= PERSISTENT_COMMITTEE_PERIOD
# Verify signature
assert bls_verify(
pubkey=validator.pubkey,