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eth2.0-specs
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add back in active_index_roots

This commit is contained in:
Danny Ryan 2019-06-30 15:19:52 -05:00
parent 3d2eaa22cb
commit c42b26b0c4
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2 changed files with 18 additions and 5 deletions
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20
specs/core/0_beacon-chain.md
View File

@ -514,6 +514,7 @@ class BeaconState(Container):
# Shuffling
start_shard: Shard
randao_mixes: Vector[Hash, EPOCHS_PER_HISTORICAL_VECTOR]
active_index_roots: Vector[Hash, EPOCHS_PER_HISTORICAL_VECTOR] # Active index digests for light clients
compact_committees_roots: Vector[Hash, EPOCHS_PER_HISTORICAL_VECTOR] # Committee digests for light clients
# Slashings
slashings: Vector[Gwei, EPOCHS_PER_SLASHINGS_VECTOR] # Per-epoch sums of slashed effective balances
@ -857,9 +858,8 @@ def get_seed(state: BeaconState, epoch: Epoch) -> Hash:
Return the seed at ``epoch``.
"""
mix = get_randao_mix(state, Epoch(epoch + EPOCHS_PER_HISTORICAL_VECTOR - MIN_SEED_LOOKAHEAD)) # Avoid underflow
active_indices = get_active_validator_indices(state, epoch)
active_indices_root = hash_tree_root(List[ValidatorIndex, VALIDATOR_REGISTRY_LIMIT](active_indices))
return hash(mix + active_indices_root + int_to_bytes(epoch, length=32))
active_index_root = state.active_index_roots[epoch % EPOCHS_PER_HISTORICAL_VECTOR]
return hash(mix + active_index_root + int_to_bytes(epoch, length=32))
```
#### `get_committee_count`
@ -1143,9 +1143,13 @@ def initialize_beacon_state_from_eth1(eth1_block_hash: Hash,
validator.activation_eligibility_epoch = GENESIS_EPOCH
validator.activation_epoch = GENESIS_EPOCH
# Populate compact_committees_roots
# Populate active_index_roots and compact_committees_roots
genesis_active_index_root = hash_tree_root(
List[ValidatorIndex, VALIDATOR_REGISTRY_LIMIT](get_active_validator_indices(state, GENESIS_EPOCH))
)
committee_root = get_compact_committees_root(state, GENESIS_EPOCH)
for index in range(EPOCHS_PER_HISTORICAL_VECTOR):
state.active_index_roots[index] = genesis_active_index_root
state.compact_committees_roots[index] = committee_root
return state
```
@ -1489,7 +1493,13 @@ def process_final_updates(state: BeaconState) -> None:
# Update start shard
state.start_shard = Shard((state.start_shard + get_shard_delta(state, current_epoch)) % SHARD_COUNT)
# Set active index root
committee_root_position = (next_epoch + ACTIVATION_EXIT_DELAY) % EPOCHS_PER_HISTORICAL_VECTOR
index_epoch = Epoch(next_epoch + ACTIVATION_EXIT_DELAY)
index_root_position = index_epoch % EPOCHS_PER_HISTORICAL_VECTOR
state.active_index_roots[index_root_position] = hash_tree_root(
List[ValidatorIndex, VALIDATOR_REGISTRY_LIMIT](get_active_validator_indices(state, index_epoch))
)
# Set committees root
committee_root_position = next_epoch % EPOCHS_PER_HISTORICAL_VECTOR
state.compact_committees_roots[committee_root_position] = get_compact_committees_root(state, next_epoch)
# Reset slashings
state.slashings[next_epoch % EPOCHS_PER_SLASHINGS_VECTOR] = Gwei(0)

3
test_libs/pyspec/eth2spec/test/helpers/genesis.py
View File

@ -43,9 +43,12 @@ def create_genesis_state(spec, num_validators):
validator.activation_eligibility_epoch = spec.GENESIS_EPOCH
validator.activation_epoch = spec.GENESIS_EPOCH
genesis_active_index_root = hash_tree_root(List[spec.ValidatorIndex, spec.VALIDATOR_REGISTRY_LIMIT](
spec.get_active_validator_indices(state, spec.GENESIS_EPOCH)))
genesis_compact_committees_root = hash_tree_root(List[spec.ValidatorIndex, spec.VALIDATOR_REGISTRY_LIMIT](
spec.get_active_validator_indices(state, spec.GENESIS_EPOCH)))
for index in range(spec.EPOCHS_PER_HISTORICAL_VECTOR):
state.active_index_roots[index] = genesis_active_index_root
state.compact_committees_roots[index] = genesis_compact_committees_root
return state