def get_master_pubkey(root_G1: tuple, chaincode_G1: tuple) -> bytes:
try:
root_pubkey = bls_conv.G1_to_pubkey(root_G1)
public_chaincode_address = bls_conv.G1_to_pubkey(chaincode_G1)
except:
raise DerivationErrorBasic('Encoding master public key')
if not bls_basic.KeyValidate(root_pubkey):
raise DerivationErrorBasic('Encoding public root key')
if not bls_basic.KeyValidate(public_chaincode_address):
raise DerivationErrorBasic('Encoding public root chaincode')
joint = root_pubkey + public_chaincode_address
return joint + sha512(joint).digest()[:6]
def parse_master_pubkey(master_pubkey: bytes) -> Tuple[tuple, tuple]:
if not len(master_pubkey) == 102:
raise DerivationErrorBasic(
f'Wrong length master public key, got {len(master_pubkey)} bytes, should be 102'
)
checksum = master_pubkey[96:102]
if sha512(master_pubkey[:96]).digest()[:6] != checksum:
raise DerivationErrorBasic(f'Wrong master public key checksum')
if not bls_basic.KeyValidate(master_pubkey[:48]):
raise DerivationErrorBasic('Parsing master public key')
if not bls_basic.KeyValidate(master_pubkey[48:96]):
raise DerivationErrorBasic('Parsing master public chaincode')
try:
root_public_key = bls_conv.pubkey_to_G1(master_pubkey[:48])
public_chaincode = bls_conv.pubkey_to_G1(master_pubkey[48:96])
except:
raise DerivationErrorBasic(
'Parsing master public to root public key and chaincode')
return root_public_key, public_chaincode
def test_key_validate(pubkey, success):
assert G2Basic.KeyValidate(pubkey) == success