def validate_is_slashable_attestation_data(
attestation_1: IndexedAttestation,
attestation_2: IndexedAttestation) -> None:
is_slashable_data = is_slashable_attestation_data(attestation_1.data,
attestation_2.data)
if not is_slashable_data:
raise ValidationError(
"The `AttesterSlashing` object doesn't meet the Casper FFG slashing conditions."
)
def test_is_slashable_attestation_data(sample_attestation_data_params,
is_double_vote, is_surround_vote):
data_1 = AttestationData(**sample_attestation_data_params)
data_2 = AttestationData(**sample_attestation_data_params)
if is_double_vote:
data_2 = data_2.copy(beacon_block_root=(
int.from_bytes(data_1.beacon_block_root, "little") +
1).to_bytes(32, "little"))
if is_surround_vote:
data_1 = data_1.copy(
source=data_1.source.copy(epoch=data_2.source.epoch - 1),
target=data_1.target.copy(epoch=data_2.target.epoch + 1),
)
assert is_slashable_attestation_data(data_1,
data_2) == (is_double_vote
or is_surround_vote)
def test_is_slashable_attestation_data(sample_attestation_data_params,
is_double_vote, is_surround_vote):
data_1 = AttestationData.create(**sample_attestation_data_params)
data_2 = AttestationData.create(**sample_attestation_data_params)
if is_double_vote:
data_2 = data_2.set(
"beacon_block_root",
(int.from_bytes(data_1.beacon_block_root, "little") + 1).to_bytes(
32, "little"),
)
if is_surround_vote:
data_1 = data_1.transform(
("source", "epoch"), data_2.source.epoch - 1).transform(
("target", "epoch"), data_2.target.epoch + 1)
assert is_slashable_attestation_data(data_1,
data_2) == (is_double_vote
or is_surround_vote)
