def sign(self, keypairs):
for i, txin in enumerate(self.inputs()):
num = txin['num_sig']
for x_pubkey in txin['x_pubkeys']:
signatures = filter(None, txin['signatures'])
if len(signatures) == num:
# txin is complete
break
if x_pubkey in keypairs.keys():
log.debug("adding signature for %s", x_pubkey)
# add pubkey to txin
txin = self._inputs[i]
x_pubkeys = txin['x_pubkeys']
ii = x_pubkeys.index(x_pubkey)
sec = keypairs[x_pubkey]
pubkey = public_key_from_private_key(sec)
txin['x_pubkeys'][ii] = pubkey
txin['pubkeys'][ii] = pubkey
self._inputs[i] = txin
# add signature
for_sig = Hash(self.tx_for_sig(i).decode('hex'))
pkey = regenerate_key(sec)
secexp = pkey.secret
private_key = MySigningKey.from_secret_exponent(secexp, curve=SECP256k1)
public_key = private_key.get_verifying_key()
sig = private_key.sign_digest_deterministic(for_sig, hashfunc=hashlib.sha256,
sigencode=ecdsa.util.sigencode_der)
assert public_key.verify_digest(sig, for_sig,
sigdecode=ecdsa.util.sigdecode_der)
txin['signatures'][ii] = sig.encode('hex')
self._inputs[i] = txin
log.debug("is_complete: %s", self.is_complete())
self.raw = self.serialize()
def sweep(cls, privkeys, network, to_address, fee):
inputs = []
keypairs = {}
for privkey in privkeys:
pubkey = public_key_from_private_key(privkey)
address = address_from_private_key(privkey)
u = network.synchronous_get(
('blockchain.address.listunspent', [address]))
pay_script = cls.pay_script(TYPE_ADDRESS, address)
for item in u:
item['scriptPubKey'] = pay_script
item['redeemPubkey'] = pubkey
item['address'] = address
item['prevout_hash'] = item['tx_hash']
item['prevout_n'] = item['tx_pos']
item['pubkeys'] = [pubkey]
item['x_pubkeys'] = [pubkey]
item['signatures'] = [None]
item['num_sig'] = 1
inputs += u
keypairs[pubkey] = privkey
if not inputs:
return
total = sum(i.get('value') for i in inputs) - fee
outputs = [(TYPE_ADDRESS, to_address, total)]
self = cls.from_io(inputs, outputs)
self.sign(keypairs)
return self
def sign(self, keypairs):
for i, txin in enumerate(self.inputs()):
num = txin['num_sig']
for x_pubkey in txin['x_pubkeys']:
signatures = filter(None, txin['signatures'])
if len(signatures) == num:
# txin is complete
break
if x_pubkey in keypairs.keys():
print_error("adding signature for", x_pubkey)
# add pubkey to txin
txin = self._inputs[i]
x_pubkeys = txin['x_pubkeys']
ii = x_pubkeys.index(x_pubkey)
sec = keypairs[x_pubkey]
pubkey = public_key_from_private_key(sec)
txin['x_pubkeys'][ii] = pubkey
txin['pubkeys'][ii] = pubkey
self._inputs[i] = txin
# add signature
for_sig = Hash(self.tx_for_sig(i).decode('hex'))
pkey = regenerate_key(sec)
secexp = pkey.secret
private_key = MySigningKey.from_secret_exponent(secexp, curve=SECP256k1)
public_key = private_key.get_verifying_key()
sig = private_key.sign_digest_deterministic(for_sig, hashfunc=hashlib.sha256,
sigencode=ecdsa.util.sigencode_der)
assert public_key.verify_digest(sig, for_sig,
sigdecode=ecdsa.util.sigdecode_der)
txin['signatures'][ii] = sig.encode('hex')
self._inputs[i] = txin
print_error("is_complete", self.is_complete())
self.raw = self.serialize()
def test_public_key_from_private_key(self):
result = public_key_from_private_key(self.private_key)
self.assertEqual(self.public_key_hex, result)
