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eth2.0-specs
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Merge branch 'dev' into name-changes

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Danny Ryan 2019-02-01 20:48:14 -08:00
parent 11ae40fc49 6a9c756191
commit 76744dea13
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1 changed files with 5 additions and 9 deletions
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14
specs/core/0_beacon-chain.md
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@ -940,7 +940,6 @@ def generate_seed(state: BeaconState,
"""
Generate a seed for the given ``epoch``.
"""
return hash(
get_randao_mix(state, epoch - MIN_SEED_LOOKAHEAD) +
get_active_index_root(state, epoch)
@ -1000,7 +999,7 @@ def get_attestation_participants(state: BeaconState,
### `is_power_of_two`
```
```python
def is_power_of_two(value: int) -> bool:
"""
Check if ``value`` is a power of two integer.
@ -1020,7 +1019,7 @@ def is_power_of_two(value: int) -> bool:
```python
def get_effective_balance(state: State, index: ValidatorIndex) -> Gwei:
"""
Return the effective balance (also known as "balance at stake") for a ``validator`` with the given ``index``.
Return the effective balance (also known as "balance at stake") for a validator with the given ``index``.
"""
return min(state.validator_balances[index], MAX_DEPOSIT_AMOUNT)
```
@ -1552,7 +1551,7 @@ def get_initial_beacon_state(initial_validator_deposits: List[Deposit],
if get_effective_balance(state, validator_index) >= MAX_DEPOSIT_AMOUNT:
activate_validator(state, validator_index, is_genesis=True)
genesis_active_index_root = hash_tree_root(get_active_validator_indices(state, GENESIS_EPOCH))
genesis_active_index_root = hash_tree_root(get_active_validator_indices(state.validator_registry, GENESIS_EPOCH))
for index in range(LATEST_ACTIVE_INDEX_ROOTS_LENGTH):
state.latest_active_index_roots[index] = genesis_active_index_root
state.current_shuffling_seed = generate_seed(state, GENESIS_EPOCH)
@ -1737,15 +1736,12 @@ For each `attestation` in `block.body.attestations`:
```python
assert attestation.custody_bitfield == b'\x00' * len(attestation.custody_bitfield) # [TO BE REMOVED IN PHASE 1]
assert attestation.aggregation_bitfield != b'\x00' * len(attestation.aggregation_bitfield)
crosslink_committee = [
committee for committee, shard in get_crosslink_committees_at_slot(state, attestation.data.slot)
if shard == attestation.data.shard
][0]
verify_bitfield(attestation.aggregation_bitfield, len(crosslink_committee))
verify_bitfield(attestation.custody_bitfield, len(crosslink_committee))
for i in range(len(crosslink_committee):
for i in range(len(crosslink_committee)):
if get_bitfield_bit(attestation.aggregation_bitfield, i) == 0b0:
assert get_bitfield_bit(attestation.custody_bitfield, i) == 0b0