def run_validate_block_proposer_signature(
state: BeaconState, state_machine: BaseBeaconStateMachine,
block: BaseBeaconBlock) -> None:
# Fast forward to state in future slot in order to pass
# block.slot validity check
try:
future_state = state_machine.state_transition.apply_state_transition(
state,
future_slot=block.slot,
)
except ValidationError as error:
raise InvalidGossipMessage(
"Failed to fast forward to state at slot=%d, error=%s",
block.slot,
str(error),
)
try:
validate_proposer_signature(future_state, block,
CommitteeConfig(state_machine.config))
except ValidationError as error:
logger.debug(
"Failed to validate block=%s, error=%s",
encode_hex(block.signing_root),
str(error),
)
def validate_is_unaggregated(attestation: Attestation) -> None:
# Check if the attestation is unaggregated
if len([bit for bit in attestation.aggregation_bits if bit is True]) != 1:
raise InvalidGossipMessage(
"The attestation is aggregated. Attestation: %s",
attestation,
)
return False
def validate_subnet_id(attestation: Attestation, subnet_id: SubnetId) -> None:
if attestation.data.index % ATTESTATION_SUBNET_COUNT != subnet_id:
raise InvalidGossipMessage(
"Wrong attestation subnet_id=%d, topic subnet_id=%d. Attestation: %s",
attestation.data.index % ATTESTATION_SUBNET_COUNT,
subnet_id,
attestation,
)
def validate_voting_beacon_block(chain: BaseBeaconChain,
attestation: Attestation) -> None:
# Check that beacon blocks attested to by the attestation are validated
try:
chain.get_block_by_root(attestation.data.beacon_block_root)
except BlockNotFound:
raise InvalidGossipMessage(
f"Failed to validate attestation={attestation},"
f" attested block={encode_hex(attestation.data.beacon_block_root)}"
" has not been not validated yet")
def run_validate_block_proposer_signature(
state: BeaconState, state_machine: BaseBeaconStateMachine,
block: BaseSignedBeaconBlock) -> None:
# Fast forward to state in future slot in order to pass
# block.slot validity check
try:
future_state, _ = state_machine.apply_state_transition(
state,
future_slot=block.slot,
)
except ValidationError as error:
raise InvalidGossipMessage(
f"Failed to fast forward to state at slot={block.slot}",
error,
)
try:
validate_proposer_signature(future_state, block, state_machine.config)
except ValidationError as error:
raise InvalidGossipMessage(
f"Failed to validate block={encode_hex(block.message.hash_tree_root)}",
error,
)
def run_validate_aggregate_and_proof(state: BeaconState,
aggregate_and_proof: AggregateAndProof,
config: CommitteeConfig) -> None:
try:
validate_aggregate_and_proof(
state,
aggregate_and_proof,
ATTESTATION_PROPAGATION_SLOT_RANGE,
config,
)
except ValidationError as error:
raise InvalidGossipMessage(
f"Failed to validate aggregate_and_proof={aggregate_and_proof}",
error,
)
def validate_subnet_id(attestation: Attestation, subnet_id: SubnetId) -> None:
if attestation.data.index % ATTESTATION_SUBNET_COUNT != subnet_id:
raise InvalidGossipMessage(
f"Wrong attestation subnet_id={attestation.data.index % ATTESTATION_SUBNET_COUNT},"
f" topic subnet_id={subnet_id}. Attestation: {attestation}")
