def validate_proof_of_possession(state: BeaconState, pubkey: BLSPubkey,
proof_of_possession: BLSSignature,
withdrawal_credentials: Hash32,
randao_commitment: Hash32) -> None:
deposit_input = DepositInput(
pubkey=pubkey,
withdrawal_credentials=withdrawal_credentials,
randao_commitment=randao_commitment,
proof_of_possession=EMPTY_SIGNATURE,
)
is_valid_signature = bls.verify(
pubkey=pubkey,
# TODO: change to hash_tree_root(deposit_input) when we have SSZ tree hashing
message=deposit_input.root,
signature=proof_of_possession,
domain=get_domain(
state.fork_data,
state.slot,
SignatureDomain.DOMAIN_DEPOSIT,
),
)
if not is_valid_signature:
raise ValidationError("BLS signature verification error")
def make_deposit_input(pubkey, withdrawal_credentials, randao_commitment):
return DepositInput(
pubkey=pubkey,
withdrawal_credentials=withdrawal_credentials,
randao_commitment=randao_commitment,
proof_of_possession=EMPTY_SIGNATURE,
)
def test_defaults(sample_deposit_input_params):
deposit_input = DepositInput(**sample_deposit_input_params)
assert deposit_input.pubkey == sample_deposit_input_params['pubkey']
def sample_deposit_data_params(sample_deposit_input_params):
return {
'deposit_input': DepositInput(**sample_deposit_input_params),
'value': 56,
'timestamp': 1501851927,
}