def sign_message(self, path: List[int], message: str) -> bytearray:
message = message.encode('utf-8')
formatted = wally.format_bitcoin_message(message, wally.BITCOIN_MESSAGE_FLAG_HASH)
privkey = self.get_privkey(path)
signature = wally.ec_sig_from_bytes(privkey, formatted,
wally.EC_FLAG_ECDSA | wally.EC_FLAG_GRIND_R)
return wally.ec_sig_to_der(signature)
def sign_message(privkey_wif: str, message: str) -> str:
"""Sign a message with a private key of a P2PKH address
'privkey_wif' must be in WIF format, message and signature are formatted
as 'signmessage' RPC does.
"""
privkey = PrivateKey.from_wif(privkey_wif)
h = wally.format_bitcoin_message(message.encode('ascii'),
wally.BITCOIN_MESSAGE_FLAG_HASH)
flags = wally.EC_FLAG_ECDSA | wally.EC_FLAG_RECOVERABLE
recoverable_signature = wally.ec_sig_from_bytes(privkey.prv, h, flags)
return base64.b64encode(recoverable_signature)
def verify_message(address: str, signature: str, message: str) -> str:
"""Sign a message with a private key of a P2PKH address
'signature' must be a recoverable signature in base64.
"""
h = wally.format_bitcoin_message(message.encode('ascii'),
wally.BITCOIN_MESSAGE_FLAG_HASH)
recoverable_sig = base64.b64decode(signature)
try:
pub = wally.ec_sig_to_public_key(h, recoverable_sig)
except ValueError:
raise InvalidRecoverableSignature
return P2PKH(PublicKey(pub)).address() == address
def sign_message(self, details: Dict) -> Dict:
message = details['message'].encode('utf-8')
formatted = wally.format_bitcoin_message(
message, wally.BITCOIN_MESSAGE_FLAG_HASH)
privkey = self.get_privkey(details['path'])
result = {}
if details['use_ae_protocol']:
signer_commitment, signature = self._make_ae_signature(
privkey, formatted, details)
signer_commitment = signer_commitment.hex()
logging.debug('Signer commitment: %s', signer_commitment)
result['signer_commitment'] = signer_commitment
else:
signature = wally.ec_sig_from_bytes(
privkey, formatted,
wally.EC_FLAG_ECDSA | wally.EC_FLAG_GRIND_R)
result['signature'] = wally.ec_sig_to_der(signature).hex()
return result
