def test_sign_and_verify(self):
data = hex_to_bytes(concat(['ab' for _ in range(32)]))
secret_key = WitPrivateKey.from_hex(concat(['cd' for _ in range(32)]))
public_key = secret_key.to_public()
local_signature = secret_key.sign_hash(data)
expected_signature = '3044' \
'0220' \
'3dc4fa74655c21b7ffc0740e29bfd88647e8dfe2b68c507cf96264e4e7439c1f' \
'0220' \
'7aa61261b18eebdfdb704ca7bab4c7bcf7961ae0ade5309f6f1398e21aec0f9f'
recovered_signature = Signature.from_hex(expected_signature)
assert local_signature.verify_hash(data, public_key)
assert recovered_signature.verify_hash(data, public_key)
def from_seed(cls,
seed: Union[bytes, str],
network_key=b'Bitcoin seed') -> 'Xprv':
"""
:param seed:
:param network_key:
:return:
"""
if isinstance(seed, str):
seed = hex_to_bytes(seed)
assert 16 <= len(seed) <= 64, 'Seed should be between 128 and 512 bits'
I = hmac.new(key=network_key, msg=seed,
digestmod=hashlib.sha512).digest()
I_L, I_R = I[:32], I[32:]
if bytes_to_int(I_L) == 0 or bytes_to_int(I_L) > CURVE.order:
raise KeyDerivationError
key, code = WitPrivateKey(I_L), I_R
# print(f'\tMaster Secret Key: {bytes_to_hex(I_L)}')
# print(f'\tMaster Chain Code: {bytes_to_hex(I_R)}')
return cls(key, code)
def from_hex(cls, h):
return cls(hex_to_bytes(h))
def from_string(cls, data: str):
return Hash(SHA256=hex_to_bytes(data))
def from_hex(cls, hex_string):
return cls.decode(hex_to_bytes(hex_string))
def from_hex(cls, hexstring: str) -> 'WitPublicKey':
return cls.decode(hex_to_bytes(hexstring))