def test_get_block_root(
current_block_number,
target_slot,
success,
epoch_length,
sample_block):
blocks, latest_block_roots = generate_mock_latest_block_roots(
sample_block,
current_block_number,
epoch_length,
)
if success:
block_root = get_block_root(
latest_block_roots,
current_block_number,
target_slot,
)
assert block_root == blocks[target_slot].root
else:
with pytest.raises(ValueError):
get_block_root(
latest_block_roots,
current_block_number,
target_slot,
)
def validate_serenity_attestation(state: BeaconState, attestation: Attestation,
epoch_length: int,
min_attestation_inclusion_delay: int,
latest_block_roots_length: int) -> None:
"""
Validate the given ``attestation``.
Raise ``ValidationError`` if it's invalid.
"""
validate_serenity_attestation_slot(
attestation.data,
state.slot,
epoch_length,
min_attestation_inclusion_delay,
)
validate_serenity_attestation_justified_slot(
attestation.data,
state.slot,
state.previous_justified_slot,
state.justified_slot,
epoch_length,
)
validate_serenity_attestation_justified_block_root(
attestation.data,
justified_block_root=get_block_root(
state=state,
slot=attestation.data.justified_slot,
latest_block_roots_length=latest_block_roots_length,
),
)
validate_serenity_attestation_latest_crosslink_root(
attestation.data,
latest_crosslink_root=state.latest_crosslinks[
attestation.data.shard].shard_block_root,
)
validate_serenity_attestation_shard_block_root(attestation.data)
validate_serenity_attestation_aggregate_signature(
state,
attestation,
epoch_length,
)
def create_mock_signed_attestations_at_slot(state,
attestation_slot):
attestations = []
shard_and_committees_at_slot = get_shard_committees_at_slot(
state,
slot=attestation_slot,
epoch_length=config.EPOCH_LENGTH,
)
for shard_committee in shard_and_committees_at_slot:
# have 0th committee member sign
voting_committee_indices = [0]
latest_crosslink_root = state.latest_crosslinks[shard_committee.shard].shard_block_root
assert len(shard_committee.committee) > 0
attestation_data = AttestationData(**sample_attestation_data_params).copy(
slot=attestation_slot,
shard=shard_committee.shard,
justified_slot=state.previous_justified_slot,
justified_block_root=get_block_root(
state,
state.previous_justified_slot,
config.LATEST_BLOCK_ROOTS_LENGTH,
),
latest_crosslink_root=latest_crosslink_root,
shard_block_root=ZERO_HASH32,
)
attestations.append(
create_mock_signed_attestation(
state,
shard_committee,
voting_committee_indices,
attestation_data,
)
)
return tuple(attestations)