def child(self, i: int) -> 'Xpub':
hardened = i >= 1 << 31
if hardened:
raise KeyDerivationError(
'Cannot derive a hardened key from an extended public key')
I = hmac.new(key=self.code,
msg=self.keydata() + int_to_bytes(i).rjust(4, b'\x00'),
digestmod=hashlib.sha512).digest()
tmp = bytes_to_hex(self.keydata() + int_to_bytes(i).rjust(4, b'\x00'))
I_L, I_R = I[:32], I[32:]
key = WitPrivateKey(I_L).to_public().point + self.key.point
ret_code = I_R
path = self.path + f'/{i}'
# TODO add point at infinity check
return Xpub(WitPublicKey(key),
ret_code,
depth=self.depth + 1,
i=i,
parent=self.fingerprint(),
path=path)
def to_json(self, as_hex: bool = True):
if self.public_key is None:
return None
return {
'public_key': list(self.public_key)
} if not as_hex else {
'public_key': bytes_to_hex(self.public_key)
}
def to_json(self, as_hex: bool = True):
return {
'proof': list(self.proof),
'public_key': self.public_key.to_json()
} if not as_hex else {
'proof': bytes_to_hex(self.proof),
'public_key': self.public_key.to_json()
}
def to_json(self, as_hex: bool = True):
return {
'bytes': list(self._bytes),
'compressed': self.compressed
} if not as_hex else {
'bytes': bytes_to_hex(self._bytes),
'compressed': self.compressed
}
def to_json(self, as_hex: bool = False):
return {
'kind':
self.kind.to_string(),
'url':
self.url,
'script':
list(self.script) if not as_hex else bytes_to_hex(self.script)
}
def to_slip32(master_key: Xprv) -> str:
depth = master_key.depth
chain_code = master_key.code
private_key = master_key.key.bytes()
slip_32 = int(depth).to_bytes(length=1, byteorder='big')
slip_32 += chain_code
slip_32 += b'\x00'
slip_32 += private_key
slip_32 += b'\x00'
bech = bech32_encode_master_key(hrp='xprv', data=bytes_to_hex(slip_32))
return bech
def to_address(self):
return bech32_encode_address(hrp='wit', data=bytes_to_hex(self.hash))
def to_string(self):
return bytes_to_hex(self.transaction_id.SHA256) + ':' + str(
self.output_index)
def hex(self):
return bytes_to_hex(self.msg)
def to_string(self):
return bytes_to_hex(self.SHA256)
def to_json(self, as_hex: bool = False):
return {
'op': self.op,
'args': list(self.args) if not as_hex else bytes_to_hex(self.args)
}
def hex(self):
return bytes_to_hex(self.encode())
def hex(self, compressed=True) -> str:
return bytes_to_hex(self.encode(compressed=compressed))
def from_json(cls, data: dict):
_bytes, _compressed = data.values()
return WitPublicKey.from_hex(
bytes_to_hex((int_to_bytes(_compressed) +
bytes(_bytes).rjust(32, b'\x00'))))
def to_json(self, as_hex: bool = True):
return {'der': list(self.der)} if not as_hex else {'der': bytes_to_hex(self.der)}
