def sender_property_patched(self: Transaction):
if self._sender:
return self._sender
if self.v and self.v >= 35:
v = bytes([self.v])
r = self.r.to_bytes(32, byteorder='big')
s = self.s.to_bytes(32, byteorder='big')
raw_tx = Transaction(self.nonce, self.gasprice, self.startgas,
self.to, self.value, self.data,
(self.v - 35) // 2, 0, 0)
msg = keccak256(rlp.encode(raw_tx))
self._sender = decode_hex(addr_from_sig(r + s + v, msg))
return self._sender
else:
return sender_property_original(self)
def test_sign_v0():
msg = sha3('hello v=0')
sig = sign(SENDER_PRIVATE_KEY, msg)
assert sig[-1] == 1
assert addr_from_sig(sig, msg) == SENDER_ADDR