def into_transaction(self, dust_secret: CBitcoinSecret,
dust_outpoint: OutPointWithTx, feerate):
if dust_outpoint.prevout.scriptPubKey != pubkey_to_P2PKH_scriptPubkey(
dust_secret.pub):
print(b2x(dust_outpoint.prevout.scriptPubKey))
print(b2x(pubkey_to_P2PKH_scriptPubkey(dust_secret.pub)))
raise Exception("Outpoint has incorrect scriptPubKey")
sum_in = dust_outpoint.prevout.nValue
fees = int(tx_size(1, 2) / 1000 * feerate)
refund = sum_in - fees - self._life_signal_amount
print('fee: %f' % fees)
print('amount: %f' % (sum_in - fees))
redeemScript = self.redeemScript
unsigned_tx = CTransaction([CTxIn(dust_outpoint.outpoint)], [
CTxOut(self._life_signal_amount,
redeemScript.to_p2sh_scriptPubKey()),
CTxOut(refund, pubkey_to_P2PKH_scriptPubkey(dust_secret.pub))
])
# spend the dust input
sighash = SignatureHash(dust_outpoint.prevout.scriptPubKey,
unsigned_tx, 0, SIGHASH_ALL)
sig = dust_secret.sign(sighash) + bytes([SIGHASH_ALL])
sigScript = CScript([sig, dust_secret.pub])
signed_input = [CTxIn(unsigned_tx.vin[0].prevout, sigScript)]
return CTransaction(signed_input, unsigned_tx.vout,
unsigned_tx.nLockTime)
def overridevaulttx(self, fromvaultaddress, toaddress):
vault = self.getvault(fromvaultaddress)
# select the input addresses
received = self.chaindb.listallreceivedbyvault(fromvaultaddress)
if not received:
self.logger.warning("Empty vault, exiting, return")
return None, None
received = received.values()[0]
if received['value'] < 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return None, None
# calculate remaining amount
amount = received['value'] - 2 * utils.calculate_fees(None)
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
# get the script
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_OVERRIDE) + chr(len(vault['master_public_key'])) + \
vault['master_public_key'] + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return amount, tx
def overridevaulttx(self, fromvaultaddress, toaddress):
vault = self.getvault(fromvaultaddress)
# select the input addresses
received = self.chaindb.listallreceivedbyvault(fromvaultaddress)
if not received:
self.logger.warning("Empty vault, exiting, return")
return None, None
received = received.values()[0]
if received['value'] < 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return None, None
# calculate remaining amount
amount = received['value'] - 2 * utils.calculate_fees(None)
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
# get the script
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_OVERRIDE) + chr(len(vault['master_public_key'])) + \
vault['master_public_key'] + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return amount, tx
def __create_new_timestamp_tx_template(self, outpoint, txout_value, change_scriptPubKey):
"""Create a new timestamp transaction template
The transaction created will have one input and two outputs, with the
timestamp output set to an invalid dummy.
The fee is set to zero, but nSequence is set to opt-in to transaction
replacement, so you can find an appropriate fee iteratively.
"""
return CTransaction([CTxIn(outpoint, nSequence=0xfffffffd)],
[CTxOut(txout_value, change_scriptPubKey),
CTxOut(-1, CScript())])
def test_init_with_field_keyword_args(self):
ins = (
CTxIn(COutPoint(lx('537ecb89e5ed7e872f988447432e6791c0a58b069c4ec8647e1683a383e867a3'), 0),
x('473044022043b9aee9187effd7e6c7bc444b09162570f17e36b4a9c02cf722126cc0efa3d502200b3ba14c809fa9a6f7f835cbdbbb70f2f43f6b30beaf91eec6b8b5981c80cea50121025edf500f18f9f2b3f175f823fa996fbb2ec52982a9aeb1dc2e388a651054fb0f'))
)
outs = (
CTxOut(114263, x('76a91495efca2c6a6f0e0f0ce9530219b48607a962e77788ac')),
CTxOut(2125893, x('76a914f28abfb465126d6772dcb4403b9e1ad2ea28a03488ac'))
)
fields_data = {'Timestamp': 1432478808}
tx = Transaction(ins, outs, 0, 2, peercoin_fields, fields_data)
self.assertEqual(tx.fields, peercoin_fields)
self.assertEqual(tx.Timestamp, 1432478808)
def withdrawfromvault(self, fromvaultaddress, toaddress, amount):
vault = self.getvault(fromvaultaddress)
received = self.chaindb.listreceivedbyvault(fromvaultaddress)
received = received.values()[0]
if received['value'] < amount + 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = 2 * utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
account = self.getaccount()
changeaddress = fromvaultaddress
self.logger.debug("Change address: %s" % changeaddress)
change_txout.scriptPubKey = \
utils.vault_address_to_pay_to_vault_script(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_WITHDRAW) + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return tx
def add_output(self,
serial_id: int,
script: str,
sats: int) -> None:
txout = CTxOut(sats, CScript(bytes.fromhex(script)))
self.outputs.append({'output': txout,
'serial_id': serial_id})
def __update_timestamp_tx(self, old_tx, new_commitment, new_min_block_height, relay_feerate):
"""Update an existing timestamp transaction
Returns the old transaction with a new commitment, and with the fee
bumped appropriately.
"""
delta_fee = int(len(old_tx.serialize()) * relay_feerate)
old_change_txout = old_tx.vout[0]
assert old_change_txout.nValue - delta_fee > relay_feerate * 3 # FIXME: handle running out of money!
return CTransaction(old_tx.vin,
[CTxOut(old_change_txout.nValue - delta_fee, old_change_txout.scriptPubKey),
CTxOut(0, CScript([OP_RETURN, new_commitment]))],
nLockTime=new_min_block_height)
def test_emergency_txout(bitcoind):
"""Test mostly the emergency tx locktime"""
amount = Decimal("50") - Decimal("500") / Decimal(COIN)
privkeys = [CKey(os.urandom(32)) for _ in range(4)]
pubkeys = [k.pub for k in privkeys]
txo = emergency_txout(pubkeys, COIN * amount)
addr = str(CBitcoinAddress.from_scriptPubKey(txo.scriptPubKey))
# This makes a transaction with only one vout
txid = bitcoind.pay_to(addr, amount)
new_amount = amount - Decimal("500") / Decimal(COIN)
addr = bitcoind.getnewaddress()
txin = CTxIn(COutPoint(lx(txid), 0), nSequence=4464)
txout = CTxOut(new_amount * COIN, CBitcoinAddress(addr).to_scriptPubKey())
tx = CMutableTransaction([txin], [txout], nVersion=2)
tx_hash = SignatureHash(emergency_script(pubkeys), tx, 0, SIGHASH_ALL,
int(amount * COIN), SIGVERSION_WITNESS_V0)
sigs = [k.sign(tx_hash) + bytes([SIGHASH_ALL]) for k in privkeys]
witness_script = [bytes(0), *sigs, emergency_script(pubkeys)]
tx.wit = CTxWitness([CTxInWitness(CScriptWitness(witness_script))])
# 1 month of locktime
bitcoind.generate_block(4464 - 2)
with pytest.raises(VerifyRejectedError, match="non-BIP68-final"):
bitcoind.send_tx(tx.serialize().hex())
bitcoind.generate_block(1)
bitcoind.send_tx(tx.serialize().hex())
assert bitcoind.has_utxo(addr)
def as_tx(self):
sum_in = sum(prevtx.nValue for _, prevtx, _ in self.prevouts)
sig_size = sum(redeemer.spendbytes for _, _, redeemer in self.prevouts)
tx_size = (
4 + # version field
2 + # # of txins
len(self.prevouts) * 41 + # txins, excluding sigs
sig_size + # txins, sigs only
1 + # # of txouts
34 + # txout
4 # nLockTime field
)
feerate = int(self.proxy._call('estimatefee', 1) * COIN)
# satoshi's per KB
if feerate <= 0:
feerate = 10000
fees = int(tx_size * feerate / 1000)
tx = CMutableTransaction(
[CTxIn(outpoint, nSequence=0) for outpoint, _, _ in self.prevouts],
[CTxOut(sum_in - fees, self.payto.to_scriptPubKey())], 0)
for n, (_, _, redeemer) in enumerate(self.prevouts):
redeemer.mutate_spend(tx, n)
unsigned_tx = CTransaction.from_tx(tx)
for n, (_, _, redeemer) in enumerate(self.prevouts):
txin = CMutableTxIn.from_txin(tx.vin[n])
txin.scriptSig = redeemer.sign_spend(unsigned_tx, n)
tx.vin[n] = CTxIn.from_txin(txin)
print(b2x(tx.serialize()))
def close_tx(self, fee: int, privkey_dest: str) -> str:
"""Create a (mutual) close tx"""
txin = CTxIn(COutPoint(bytes.fromhex(self.txid), self.output_index))
out_privkey = privkey_expand(privkey_dest)
txout = CTxOut(self.amount - fee,
CScript([script.OP_0,
Hash160(coincurve.PublicKey.from_secret(out_privkey.secret).format())]))
tx = CMutableTransaction(vin=[txin], vout=[txout])
sighash = script.SignatureHash(self.redeemscript(), tx, inIdx=0,
hashtype=script.SIGHASH_ALL,
amount=self.amount,
sigversion=script.SIGVERSION_WITNESS_V0)
sigs = [key.sign(sighash, hasher=None) for key in self.funding_privkeys_for_tx()]
# BOLT #3:
# ## Closing Transaction
# ...
# * `txin[0]` witness: `0 <signature_for_pubkey1> <signature_for_pubkey2>`
witness = CScriptWitness([bytes(),
sigs[0] + bytes([script.SIGHASH_ALL]),
sigs[1] + bytes([script.SIGHASH_ALL]),
self.redeemscript()])
tx.wit = CTxWitness([CTxInWitness(witness)])
return tx.serialize().hex()
def build_bounce_tx(self, txid_hex):
#Generate p2sh script pub key.
redeem_script = self.fund_redeem_script(self.my)
redeem_script_hash160 = self.hash160_script(redeem_script)
txin_script_pub_key = CScript(
[OP_HASH160, redeem_script_hash160["bin"], OP_EQUAL])
#Generate address to receive bounce.
if "bounce" not in self.key_pairs:
self.key_pairs["bounce"] = self.key_pair_from_address(
self.jsonrpc[self.my].getnewaddress(), self.my)
#Setup tx inputs and outputs.
txid = lx(txid_hex)
vout = 0
txin = CTxIn(COutPoint(txid, vout), CScript(), 0) #Sequence number 0.
txout = CTxOut(
(self.send_amount -
decimal.Decimal(coinbend.config["mining_fee"]["standard"])) *
COIN,
CBitcoinAddress(
self.key_pairs["bounce"]["addr"]["base58"]).to_scriptPubKey())
#Locktime is unsigned int 4, unix timestamp in little endian format.
#(Conversion to little endian is handled by the library already.)
nlock_time = datetime.datetime.now() + datetime.timedelta(
seconds=self.future_minutes * 60)
nlock_time = int(nlock_time.strftime("%s"))
#Create unsigned transaction.
tx = CTransaction([txin], [txout], nlock_time)
return b2x(tx.serialize())
def spend_command(args):
args.addr = CBitcoinAddress(args.addr)
redeemScript = hodl_redeemScript(args.privkey, args.nLockTime)
scriptPubKey = redeemScript.to_p2sh_scriptPubKey()
proxy = bitcoin.rpc.Proxy()
prevouts = []
for prevout in args.prevouts:
try:
txid, n = prevout.split(':')
txid = lx(txid)
n = int(n)
outpoint = COutPoint(txid, n)
except ValueError:
args.parser.error('Invalid output: %s' % prevout)
try:
prevout = proxy.gettxout(outpoint)
except IndexError:
args.parser.error('Outpoint %s not found' % outpoint)
prevout = prevout['txout']
if prevout.scriptPubKey != scriptPubKey:
args.parser.error('Outpoint not correct scriptPubKey')
prevouts.append((outpoint, prevout))
sum_in = sum(prev_txout.nValue for outpoint, prev_txout in prevouts)
tx_size = (
4 + # version field
2 + # # of txins
len(prevouts) * 153 + # txins, including sigs
1 + # # of txouts
34 + # txout
4 # nLockTime field
)
feerate = int(proxy._call('estimatefee', 1) * COIN) # satoshi's per KB
if feerate <= 0:
feerate = 10000
fees = int(tx_size / 1000 * feerate)
unsigned_tx = CTransaction(
[CTxIn(outpoint, nSequence=0) for outpoint, prevout in prevouts],
[CTxOut(sum_in - fees, args.addr.to_scriptPubKey())], args.nLockTime)
signed_tx = CTransaction([
CTxIn(txin.prevout,
spend_hodl_redeemScript(args.privkey, args.nLockTime,
unsigned_tx, i),
nSequence=0) for i, txin in enumerate(unsigned_tx.vin)
], unsigned_tx.vout, unsigned_tx.nLockTime)
print(b2x(signed_tx.serialize()))
def vault_txout(pubkeys, value):
"""The output of the funding transaction.
:param pubkeys: A list containing the pubkey of each stakeholder, as bytes.
:param value: The output value in satoshis.
:return: A CTxOut paying to a 4of4.
"""
script = vault_script(pubkeys)
p2wsh = CScript([OP_0, hashlib.sha256(script).digest()])
return CTxOut(value, p2wsh)
def create_timestamp(timestamp, calendar_urls, setup_bitcoin=False):
"""Create a timestamp
calendar_urls - List of calendar's to use
setup_bitcoin - False if Bitcoin timestamp not desired; set to
args.setup_bitcoin() otherwise.
"""
if setup_bitcoin:
proxy = setup_bitcoin()
unfunded_tx = CTransaction([], [CTxOut(0, CScript([OP_RETURN, timestamp.msg]))])
r = proxy.fundrawtransaction(unfunded_tx) # FIXME: handle errors
funded_tx = r['tx']
r = proxy.signrawtransaction(funded_tx)
assert r['complete']
signed_tx = r['tx']
txid = proxy.sendrawtransaction(signed_tx)
logging.info('Sent timestamp tx')
blockhash = None
while blockhash is None:
logging.info('Waiting for timestamp tx %s to confirm...' % b2lx(txid))
time.sleep(1)
r = proxy.gettransaction(txid)
if 'blockhash' in r:
# FIXME: this will break when python-bitcoinlib adds RPC
# support for gettransaction, due to formatting differences
blockhash = lx(r['blockhash'])
logging.info('Confirmed by block %s' % b2lx(blockhash))
block = proxy.getblock(blockhash)
r = proxy.getblockheader(blockhash, True)
blockheight = r['height']
# We have a block hash! We can now generate the attestation from the block.
block_timestamp = make_timestamp_from_block(timestamp.msg, block, blockheight)
assert block_timestamp is not None
timestamp.merge(block_timestamp)
for calendar_url in calendar_urls:
remote = remote_calendar(calendar_url)
logging.info('Submitting to remote calendar %s' % calendar_url)
calendar_timestamp = remote.submit(timestamp.msg)
timestamp.merge(calendar_timestamp)
def withdrawfromvault(self, fromvaultaddress, toaddress, amount):
vault = self.getvault(fromvaultaddress)
received = self.chaindb.listreceivedbyvault(fromvaultaddress)
received = received.values()[0]
if received['value'] < amount + 2 * utils.calculate_fees(None):
self.logger.warning("Insufficient funds in vault, exiting, return")
return
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
# calculate nValueIn
nValueIn = received['value']
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = 2 * utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
account = self.getaccount()
changeaddress = fromvaultaddress
self.logger.debug("Change address: %s" % changeaddress)
change_txout.scriptPubKey = \
utils.vault_address_to_pay_to_vault_script(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
key = CKey()
key.set_pubkey(vault['public_key'])
key.set_privkey(vault['private_key'])
signature = key.sign(txhash)
vaultscript = utils.create_vault_script(vault['address'], \
vault['master_address'], vault['timeout'], vault['maxfees'])
scriptSig = chr(OP_VAULT_WITHDRAW) + chr(len(signature)) + signature + \
chr(len(vaultscript)) + vaultscript
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
return tx
def get_outputs(self):
vout = []
for i in range(self.model.rowCount()):
value, ok = self.model.item(i, 0).data(RawRole).toInt()
if not ok:
raise Exception('Could not get satoshis for output %d' % i)
return
out_script = Script(
str(self.model.item(i,
1).data(RawRole).toString()).decode('hex'))
i_output = CTxOut(value, out_script.get_hex().decode('hex'))
vout.append(i_output)
return vout
def emergency_txout(pubkeys, value):
"""The "deep vault". Different pubkeys, and a big timelock.
:param pubkeys: A list containing the offline pubkey of each of the
stakeholders, as bytes.
:param value: The output value in satoshis.
:return: A CTxOut paying to a 4of4 of all stakeholers' offline pubkeys
after approximatively a month.
"""
script = emergency_script(pubkeys)
p2wsh = CScript([OP_0, hashlib.sha256(script).digest()])
return CTxOut(value, p2wsh)
def from_utxo(txid_in: str,
tx_index_in: int,
sats: int,
privkey: str,
fee: int,
local_node_privkey: str,
local_funding_privkey: str,
remote_node_privkey: str,
remote_funding_privkey: str,
chain_hash: str = regtest_hash) -> Tuple['Funding', str]:
"""Make a funding transaction by spending this utxo using privkey: return Funding, tx."""
# Create dummy one to start: we will fill in txid at the end.
funding = Funding('', 0, sats - fee, local_node_privkey,
local_funding_privkey, remote_node_privkey,
remote_funding_privkey, chain_hash)
# input private key.
inkey = privkey_expand(privkey)
inkey_pub = coincurve.PublicKey.from_secret(inkey.secret)
# use RBF'able input (requirement for dual-funded things)
txin = CTxIn(COutPoint(bytes.fromhex(txid_in), tx_index_in),
nSequence=0xFFFFFFFD)
txout = CTxOut(
sats - fee,
CScript([script.OP_0,
sha256(funding.redeemscript()).digest()]))
tx = CMutableTransaction([txin], [txout],
nVersion=2,
nLockTime=funding.locktime)
# now fill in funding txid.
funding.txid = tx.GetTxid().hex()
funding.tx = tx
# while we're here, sign the transaction.
address = P2WPKHBitcoinAddress.from_scriptPubKey(
CScript([script.OP_0, Hash160(inkey_pub.format())]))
sighash = script.SignatureHash(address.to_redeemScript(),
tx,
0,
script.SIGHASH_ALL,
amount=sats,
sigversion=script.SIGVERSION_WITNESS_V0)
sig = inkey.sign(sighash, hasher=None) + bytes([script.SIGHASH_ALL])
tx.wit = CTxWitness(
[CTxInWitness(CScriptWitness([sig, inkey_pub.format()]))])
return funding, tx.serialize().hex()
def get_first_vout_from_tx_json(cls, tx_json: dict) -> CTxOut:
'''
Adapter method for returning first vout.
Args:
tx_json (dict): dictionary with transaction details
Returns:
CTxOut: transaction output
'''
cscript = script.CScript.fromhex(
tx_json['vout'][0]['scriptPubKey']['hex'])
nValue = to_base_units(float(tx_json['vout'][0]['value']))
return CTxOut(nValue, cscript)
def accuse(self, dust_op: OutPointWithTx, wallet_op: OutPointWithTx,
user_index, secret_sgx):
ls_tx = self._life_signals[user_index].into_transaction(
secret_sgx, dust_op, feerate)
# FIXME: hardcode zero here because life signal is always the first output in a life signal tx
nOut_for_ls = 0
ls = self._life_signals[user_index]
if ls_tx.vout[
nOut_for_ls].scriptPubKey != ls.redeemScript.to_p2sh_scriptPubKey(
):
raise Exception("SGX can't spend the life signal")
if wallet_op.prevout.scriptPubKey != self.scriptPubkey():
raise Exception("wallet utxo mismatch")
print('ls value: %f' % ls_tx.vout[nOut_for_ls].nValue)
sum_in = ls_tx.vout[0].nValue + wallet_op.prevout.nValue
fees = int(tx_size(2, 1) / 1000 * feerate)
print('fee: %f' % fees)
print('amount: %f' % (sum_in - fees))
# note: nVersion=2 is required by CSV
unsigned_tx = CTransaction([
CTxIn(COutPoint(ls_tx.GetTxid(), nOut_for_ls),
nSequence=ls.relative_timeout),
CTxIn(wallet_op.outpoint)
], [
CTxOut(wallet_op.prevout.nValue,
self.scriptPubkey(exclude_indices=(user_index, )))
],
nVersion=2)
# spend the life signal
lifesignal_sigScript = self._life_signals[
user_index].scriptSig_by_key2(unsigned_tx, 0)
# spend the wallet
wallet_sigScript = self._scriptSig_by_sgx(secret_sgx, unsigned_tx, 1)
# return the life signal as well as both transactions
return ls, ls_tx, CTransaction([
CTxIn(unsigned_tx.vin[0].prevout,
scriptSig=lifesignal_sigScript,
nSequence=ls.relative_timeout),
CTxIn(wallet_op.outpoint, wallet_sigScript)
], unsigned_tx.vout, unsigned_tx.nLockTime, unsigned_tx.nVersion)
def add_output():
try:
val_str = str(output_value.text())
value = 0
if '.' in val_str:
value = int(float(val_str) * pow(10, 8))
else:
value = int(val_str)
out_script = Script.from_human(str(output_script.toPlainText()))
new_output = CTxOut(value, out_script.get_hex().decode('hex'))
except Exception as e:
self.status_message(str(e), True)
return
else:
self.outputs_tree.add_output(new_output)
rm_output_edit.setRange(0, len(self.outputs_tree.get_outputs()) - 1)
def unvault_txout(pubkeys, pub_server, value):
"""The output of the unvaulting transaction (which spends the funding one).
This transaction locks coins to server + 2of3 composed of [trader1,
trader2, stakeholder1] after 6 blocks, or to a 4of4 composed of [trader1,
trader2, stastakeholder1, stastakeholder2] immediately.
:param pubkeys: The pubkeys of the 4 stakeholders, as bytes.
:param pub_server: The pubkey of the cosigning server, as bytes.
:param value: The output value in satoshis.
:return: A CTxOut paying to the script detailed above.
"""
script = unvault_script(*pubkeys, pub_server)
p2wsh = CScript([OP_0, hashlib.sha256(script).digest()])
return CTxOut(value, p2wsh)
def htlc_outputs(self, side: Side) -> List[Tuple[HTLC, int, bytes]]:
"""Give CTxOut, cltv_expiry, redeemscript for each non-trimmed HTLC"""
ret: List[Tuple[CTxOut, int, bytes]] = []
for htlc in self.untrimmed_htlcs(side):
if htlc.owner == side:
redeemscript, sats = self._offered_htlc_output(htlc, side)
else:
redeemscript, sats = self._received_htlc_output(htlc, side)
ret.append(
(CTxOut(sats,
CScript([script.OP_0,
sha256(redeemscript).digest()])),
htlc.cltv_expiry, redeemscript))
return ret
def add_input_output(bitcoind, tx):
"""Add an input and an output to a CMutableTransaction, SIGHASH_ALL."""
# First we get some coins
privkey = CKey(os.urandom(32))
scriptPubKey = CScript([OP_0, Hash160(privkey.pub)])
address = CBitcoinAddress.from_scriptPubKey(scriptPubKey)
amount = Decimal("50") * Decimal(COIN) - Decimal("500")
# This creates a one-output transaction
txid = bitcoind.pay_to(str(address), amount / Decimal(COIN))
# We bump the fees by 5000
tx.vout.append(CTxOut(amount - Decimal("5000"), scriptPubKey))
tx.vin.append(CTxIn(COutPoint(lx(txid), 0)))
# Sign the new output with ALL
tx_hash = SignatureHash(address.to_redeemScript(), tx, 1, SIGHASH_ALL,
int(amount), SIGVERSION_WITNESS_V0)
sig = privkey.sign(tx_hash) + bytes([SIGHASH_ALL])
tx.wit.vtxinwit.append(CTxInWitness(CScriptWitness([sig, privkey.pub])))
def spend_command(pubkey, nLockTime, prevOuts):
addr = P2PKHBitcoinAddress.from_pubkey(x(pubkey))
address = addr
redeemScript = hodl_redeemScript(pubkey, nLockTime)
scriptPubKey = redeemScript.to_p2sh_scriptPubKey()
proxy = bitcoin.rpc.Proxy(btc_conf_file=bitcoin.params.CONF_FILE)
prevouts = []
for prevout in prevOuts:
try:
txid, n = prevout.split(':')
txid = lx(txid)
n = int(n)
outpoint = COutPoint(txid, n)
except ValueError:
raise Exception('Invalid output: %s' % prevout)
try:
prevout = proxy.gettxout(outpoint)
except IndexError:
raise Exception('Outpoint %s not found' % outpoint)
prevout = prevout['txout']
if prevout.scriptPubKey != scriptPubKey:
raise Exception('Outpoint not correct scriptPubKey')
prevouts.append((outpoint, prevout))
sum_in = sum(prev_txout.nValue for outpoint, prev_txout in prevouts)
tx_size = (
4 + # version field
2 + # number of txins
len(prevouts) * 153 + # txins, including sigs
1 + # number of txouts
34 + # txout
4) # nLockTime field
feerate = int(proxy._call('estimatefee', 1) * COIN) # satoshi's per KB
if feerate <= 0:
feerate = 10000
fees = int(tx_size / 1000 * feerate)
unsigned_tx = CTransaction([
CTxIn(outpoint, redeemScript, nSequence=0)
for outpoint, prevout in prevouts
], [CTxOut(sum_in - fees, address.to_scriptPubKey())], nLockTime)
return ({'redeemTransaction': b2x(unsigned_tx.serialize())})
def appeal(self, user_index, user_secret: CBitcoinSecret,
lifesignal_op: OutPointWithTx):
ls = self._life_signals[user_index]
if lifesignal_op.prevout.scriptPubKey != ls.redeemScript.to_p2sh_scriptPubKey(
):
raise Exception("mismatch scriptPubkey")
# spend the life signal into a black hole
unsigned_tx = CTransaction([CTxIn(lifesignal_op.outpoint)],
[CTxOut(0, CScript([True]))],
nVersion=2)
return CTransaction([
CTxIn(lifesignal_op.outpoint,
scriptSig=ls.scriptSig_by_key1(user_secret, unsigned_tx, 0))
],
unsigned_tx.vout,
nVersion=2)
def create_spend_tx(unvault_txid, unvault_vout, addresses):
"""Create the transaction which spends the unvault_tx after the relative
locktime with the given private keys.
:param unvault_txid: The id of the unvaulting transaction.
:param unvault_vout: The index of the unvault output in this transaction.
:param addresses: A dictionary containing address as keys and amount to
send in sats as value.
:return: The unsigned transaction, a CMutableTransaction.
"""
txouts = [
CTxOut(value,
CBitcoinAddress(address).to_scriptPubKey())
for address, value in addresses.items()
]
txin = CTxIn(COutPoint(unvault_txid, unvault_vout), nSequence=6)
return CMutableTransaction([txin], txouts, nVersion=2)
def gettxout(self, outpoint, includemempool=True):
"""Return details about an unspent transaction output.
Raises IndexError if outpoint is not found or was spent.
includemempool - Include mempool txouts
"""
r = self._call('gettxout', b2lx(outpoint.hash), outpoint.n, includemempool)
if r is None:
raise IndexError('%s.gettxout(): unspent txout %r not found' % (self.__class__.__name__, outpoint))
r['txout'] = CTxOut(int(r['value'] * COIN),
CScript(unhexlify(r['scriptPubKey']['hex'])))
del r['value']
del r['scriptPubKey']
r['bestblock'] = lx(r['bestblock'])
return r
def SignatureHash(script, txTo, inIdx, hashtype):
if inIdx >= len(txTo.vin):
return (1, "inIdx %d out of range (%d)" % (inIdx, len(txTo.vin)))
txtmp = CTransaction()
txtmp.copy(txTo)
for txin in txtmp.vin:
txin.scriptSig = b''
txtmp.vin[inIdx].scriptSig = script.vch
if (hashtype & 0x1f) == SIGHASH_NONE:
txtmp.vout = []
for i in range(len(txtmp.vin)):
if i != inIdx:
txtmp.vin[i].nSequence = 0
elif (hashtype & 0x1f) == SIGHASH_SINGLE:
outIdx = inIdx
if outIdx >= len(txtmp.vout):
return (1,
"outIdx %d out of range (%d)" % (outIdx, len(txtmp.vout)))
tmp = txtmp.vout[outIdx]
txtmp.vout = []
for i in range(outIdx):
txtmp.vout.append(CTxOut())
txtmp.vout.append(tmp)
for i in range(len(txtmp.vin)):
if i != inIdx:
txtmp.vin[i].nSequence = 0
if hashtype & SIGHASH_ANYONECANPAY:
tmp = txtmp.vin[inIdx]
txtmp.vin = []
txtmp.vin.append(tmp)
s = txtmp.serialize()
s += struct.pack(b"<I", hashtype)
hash = Hash(s)
return (hash, )
def forge_prevtx(
vouts: Sequence[Tuple[str, int]],
network: str = "mainnet") -> Tuple[bytes, messages.TransactionType]:
"""
Forge a transaction with the given vouts.
"""
bitcoin.SelectParams(network)
input = messages.TxInputType(
prev_hash=b"\x00" * 32,
prev_index=0xFFFFFFFF,
script_sig=b"\x00",
sequence=0xFFFFFFFF,
)
outputs = [
messages.TxOutputBinType(
amount=amount,
script_pubkey=bytes(CBitcoinAddress(address).to_scriptPubKey()),
) for address, amount in vouts
]
tx = messages.TransactionType(
version=1,
inputs=[input],
bin_outputs=outputs,
lock_time=0,
)
cin = CTxIn(
COutPoint(input.prev_hash, input.prev_index),
CScript(input.script_sig),
input.sequence,
)
couts = [
CTxOut(output.amount, CScript(output.script_pubkey))
for output in tx.bin_outputs
]
txhash = CTransaction([cin], couts, tx.lock_time,
tx.version).GetTxid()[::-1]
bitcoin.SelectParams("mainnet")
return txhash, tx
def add_input_output(bitcoind, tx, coin, fees):
"""Add another input to the transaction to bump the feerate."""
coin_amount = Decimal(coin["amount"]) * Decimal(COIN)
# First get the private key from bitcoind's wallet.
privkey = CKey(wif_decode(bitcoind.dumpprivkey(coin["address"])))
# Add the fetched coin as a new input.
tx.vin.append(CTxIn(COutPoint(lx(coin["txid"]), coin["vout"])))
# And likely add an output, otherwise all goes to the fees.
scriptPubKey = CScript([OP_0, Hash160(privkey.pub)])
if coin_amount > fees + 294:
# For simplicity, pay to the same script
tx.vout.append(CTxOut(coin_amount - Decimal(fees), scriptPubKey))
address = CBitcoinAddress.from_scriptPubKey(scriptPubKey)
# We only do this once, sign it with ALL
tx_hash = SignatureHash(address.to_redeemScript(), tx, 1, SIGHASH_ALL,
int(coin_amount), SIGVERSION_WITNESS_V0)
sig = privkey.sign(tx_hash) + bytes([SIGHASH_ALL])
tx.wit.vtxinwit.append(
CTxInWitness(CScriptWitness([sig, privkey.pub]))
)
return tx
import binascii
import hashlib
from bitcoin.key import CKey
from bitcoin.core import COutPoint, CTxIn, CTxOut, CTransaction
# from utils
def myhash(s):
return hashlib.sha256(hashlib.sha256(s).digest()).digest()
previous = COutPoint()
txin = CTxIn()
txout = CTxOut()
tx = CTransaction()
# get the outpoint from which we want to spend
previous.hash = 0xeccf7e3034189b851985d871f91384b8ee357cd47c3024736e5676eb2debb3f2
previous.n = 0x01000000
txin.prevout = previous
txin.scriptSig = binascii.unhexlify("76a914010966776006953d5567439e5e39f86a0d273bee88ac")
# create output transaction
txout.nValue = 0x605af40500000000
txout.scriptPubKey = binascii.unhexlify("76a914097072524438d003d23a2f23edb65aae1bb3e46988ac")
# set inputs and outputs
tx.vin.append(txin)
tx.vout.append(txout)
sertx = tx.serialize() + binascii.unhexlify("01000000")
def sendtoaddress(self, toaddress, amount):
# select the input addresses
funds = 0
subaccounts = []
accounts = self.getaccounts()
for account in accounts:
for address, subaccount in account.iteritems():
if subaccount['balance'] == 0:
continue
else:
subaccounts.append(subaccount)
# print "got one subaccount", subaccount
# print "subaccounts: ", subaccounts
funds = funds + subaccount['balance']
if funds >= amount + utils.calculate_fees(None):
break
# print "subaccounts 2: ", subaccounts
# incase of insufficient funds, return
if funds < amount + utils.calculate_fees(None):
print "In sufficient funds, exiting, return"
return
# create transaction
tx = CTransaction()
# print "subaccounts 3: ", subaccounts
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(toaddress)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
public_keys = []
private_keys = []
# secrets = []
# print "subaccounts 4: ", subaccounts
for subaccount in subaccounts:
# print "subaccount: ", subaccount
# get received by from address
previous_txouts = subaccount['received']
# print "Previous txouts", previous_txouts
for received in previous_txouts:
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = binascii.unhexlify(received['scriptPubKey'])
tx.vin.append(txin)
nValueIn = nValueIn + received['value']
public_keys.append(subaccount['public_key'])
private_keys.append(subaccount['private_key'])
# secrets.append(subaccount['secret'])
if nValueIn >= amount + utils.calculate_fees(tx):
break
if nValueIn >= amount + utils.calculate_fees(tx):
break
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
changeaddress = subaccounts[0]['address']
change_txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
# sign the transaction
for public_key, private_key, txin in zip(public_keys, private_keys, tx.vin):
key = CKey()
key.set_pubkey(public_key)
key.set_privkey(private_key)
signature = key.sign(txhash)
# scriptSig = chr(len(signature)) + hash_type + signature + chr(len(public_key)) + public_key
scriptSig = chr(len(signature)) + signature + chr(len(public_key)) + public_key
print "Adding signature: ", binascii.hexlify(scriptSig)
txin.scriptSig = scriptSig
print "Tx Validity: ", tx.is_valid()
return tx
if args.testnet:
bitcoin.SelectParams('testnet')
rpc = bitcoin.rpc.Proxy()
args.dust = int(args.dust * COIN)
feeperbyte1 = args.fee1 / 1000 * COIN
feeperbyte2 = args.fee2 / 1000 * COIN
# Construct payment tx
payment_address = CBitcoinAddress(args.address)
payment_txout = CTxOut(int(args.amount * COIN), payment_address.to_scriptPubKey())
change_txout = CTxOut(0, rpc.getnewaddress().to_scriptPubKey())
tx = CTransaction()
tx.vout.append(change_txout)
tx.vout.append(payment_txout)
# Add all undesirable txouts meant to reduce propagation
if args.op_return:
op_ret_txout = CTxOut(0, CScript([OP_RETURN, b'\x00unsuccessful double-spend attempt\x00']))
tx.vout.append(op_ret_txout)
if args.multisig:
multisig_txout = CTxOut(args.dust,
CScript([1, x('0378d430274f8c5ec1321338151e9f27f4c676a008bdf8638d07c0b6be9ab35c71'),
b'\x00'*33,
2, OP_CHECKMULTISIG]))
coinbase = "04ffff001d0104455468652054696d65732030332f4a616e2f32303039204368616e63656c6c6f72206f6e206272696e6b206f66207365636f6e64206261696c6f757420666f722062616e6b73" scriptPubKeyHex = "4104678afdb0fe5548271967f1a67130b7105cd6a828e03909a67962e0ea1f61deb649f6bc3f4cef38c4f35504e51ec112de5c384df7ba0b8d578a4c702b6bf11d5fac" # construct previous out point previousOut = COutPoint() previousOut.hash = 0 previousOut.n = 4294967295 # construct txin txin = CTxIn() txin.coinbase = binascii.unhexlify(coinbase) txin.scriptSig = binascii.unhexlify(coinbase) txin.prevout = previousOut # construct txout txout = CTxOut() txout.nValue = 5000000000 txout.scriptPubKey = binascii.unhexlify(scriptPubKeyHex) # create transaction tx = CTransaction() tx.vin.append(txin) tx.vout.append(txout) tx.calc_sha256() print tx print "Transaction: ", tx.is_valid() print "hash: ", hex(tx.sha256) print "Hash: ", "0x4a5e1e4baab89f3a32518a88c31bc87f618f76673e2cc77ab2127b7afdeda33b" block = CBlock() block.nVersion = 1
def sendtovault(self, vault_address, amount):
# select the input addresses
funds = 0
subaccounts = []
accounts = self.getaccounts()
for account in accounts:
for address, subaccount in account.iteritems():
if subaccount['balance'] == 0:
continue
else:
subaccounts.append(subaccount)
funds = funds + subaccount['balance']
if funds >= amount + utils.calculate_fees(None):
break
# incase of insufficient funds, return
if funds < amount + utils.calculate_fees(None):
self.logger.warning("Insufficient funds, exiting, return")
raise exceptions.InsufficientBalanceException
# create transaction
tx = CTransaction()
# to the receiver
txout = CTxOut()
txout.nValue = amount
txout.scriptPubKey = utils.vault_address_to_pay_to_vault_script(vault_address)
tx.vout.append(txout)
# from the sender
nValueIn = 0
nValueOut = amount
public_keys = []
private_keys = []
for subaccount in subaccounts:
# get received by from address
previous_txouts = subaccount['received']
for received in previous_txouts:
txin = CTxIn()
txin.prevout = COutPoint()
txin.prevout.hash = received['txhash']
txin.prevout.n = received['n']
txin.scriptSig = received['scriptPubKey']
tx.vin.append(txin)
nValueIn = nValueIn + received['value']
public_keys.append(subaccount['public_key'])
private_keys.append(subaccount['private_key'])
if nValueIn >= amount + utils.calculate_fees(tx):
break
if nValueIn >= amount + utils.calculate_fees(tx):
break
# calculate the total excess amount
excessAmount = nValueIn - nValueOut
# calculate the fees
fees = utils.calculate_fees(tx)
# create change transaction, if there is any change left
if excessAmount > fees:
change_txout = CTxOut()
change_txout.nValue = excessAmount - fees
changeaddress = self.getnewaddress()[1]
change_txout.scriptPubKey = utils.address_to_pay_to_pubkey_hash(changeaddress)
tx.vout.append(change_txout)
# calculate txhash
tx.calc_sha256()
txhash = str(tx.sha256)
self.logger.debug("Sending to vault %064x" % tx.sha256)
# sign the transaction
for public_key, private_key, txin in zip(public_keys, private_keys, tx.vin):
key = CKey()
key.set_pubkey(public_key)
key.set_privkey(private_key)
signature = key.sign(txhash)
# scriptSig = chr(len(signature)) + hash_type + signature + chr(len(public_key)) + public_key
scriptSig = chr(len(signature)) + signature + chr(len(public_key)) + public_key
self.logger.debug("Adding signature: %s" % binascii.hexlify(scriptSig))
txin.scriptSig = scriptSig
self.logger.debug("Tx Validity: %064x" % tx.is_valid())
# push data to vault
tx.calc_sha256()
self.set(str("vault:" + vault_address), {'txhash': tx.sha256})
return (vault_address, tx)
