def get_specification(self,
ursula_pubkey,
alice_address,
blockhash,
ursula_identity_evidence=b''):
ursula_pubkey = bytes(ursula_pubkey)
ursula_identity_evidence = bytes(ursula_identity_evidence)
alice_address = bytes(alice_address)
blockhash = bytes(blockhash)
expected_lengths = (
(ursula_pubkey, 'ursula_pubkey',
UmbralPublicKey.expected_bytes_length()),
(alice_address, 'alice_address', ETH_ADDRESS_BYTE_LENGTH),
(blockhash, 'blockhash', ETH_HASH_BYTE_LENGTH),
# TODO: Why does ursula_identity_evidence has a default value of b''? for federated, perhaps?
)
for parameter, name, expected_length in expected_lengths:
if len(parameter) != expected_length:
raise ValueError(
f"{name} must be of length {expected_length}, but it's {len(parameter)}"
)
task_specification = (bytes(self.capsule), ursula_pubkey,
ursula_identity_evidence, alice_address,
blockhash)
return b''.join(task_specification)
def test_public_key_as_hex(random_ec_curvebn1):
pubkey = UmbralPrivateKey(random_ec_curvebn1, default_params()).get_pubkey()
hex_string = pubkey.hex()
assert set(hex_string).issubset(set(string.hexdigits))
assert len(hex_string) == 2 * UmbralPublicKey.expected_bytes_length()
decoded_pubkey = UmbralPublicKey.from_hex(hex_string)
assert pubkey == decoded_pubkey
hex_string = pubkey.hex(is_compressed=False)
assert set(hex_string).issubset(set(string.hexdigits))
assert len(hex_string) == 2 * UmbralPublicKey.expected_bytes_length(is_compressed=False)
decoded_pubkey = UmbralPublicKey.from_hex(hex_string)
assert pubkey == decoded_pubkey
