hydrachain/consensus/base.py
def sign(self, privkey):
        """Sign this with a private key"""
        if self.v:
            raise InvalidSignature("already signed")

        if privkey in (0, '', '\x00' * 32):
            raise InvalidSignature("Zero privkey cannot sign")
        rawhash = sha3(rlp.encode(self, self.__class__.exclude(['v', 'r', 's'])))

        if len(privkey) == 64:
            privkey = encode_privkey(privkey, 'bin')

        pk = PrivateKey(privkey, raw=True)
        signature = pk.ecdsa_recoverable_serialize(pk.ecdsa_sign_recoverable(rawhash, raw=True))

        signature = signature[0] + chr(signature[1])

        self.v = ord(signature[64]) + 27
        self.r = big_endian_to_int(signature[0:32])
        self.s = big_endian_to_int(signature[32:64])

        self._sender = None
        return self
def sign(self, privkey):
        """Sign this with a private key"""
        if self.v:
            raise InvalidSignature("already signed")

        if privkey in (0, '', '\x00' * 32):
            raise InvalidSignature("Zero privkey cannot sign")
        rawhash = sha3(rlp.encode(self, self.__class__.exclude(['v', 'r', 's'])))

        if len(privkey) == 64:
            privkey = encode_privkey(privkey, 'bin')

        pk = PrivateKey(privkey, raw=True)
        signature = pk.ecdsa_recoverable_serialize(pk.ecdsa_sign_recoverable(rawhash, raw=True))

        signature = signature[0] + chr(signature[1])

        self.v = ord(signature[64]) + 27
        self.r = big_endian_to_int(signature[0:32])
        self.s = big_endian_to_int(signature[32:64])

        self._sender = None
        return self
Sign this with a private key