def calculate_tx_fees(coins, currency, tx_hex):
#Process source TX.
rpc = coins[currency]["rpc"]["sock"]
tx = CTransaction.deserialize(binascii.unhexlify(tx_hex))
#Tally input coins.
input_total = decimal.Decimal(0)
for vin in tx.vin:
txid = b2lx(vin.prevout.hash)
vin_tx_hex = rpc.getrawtransaction(txid)
vin_tx = CTransaction.deserialize(binascii.unhexlify(vin_tx_hex))
input_value = vin_tx.vout[vin.prevout.n].nValue
input_total += decimal.Decimal(str_money_value(input_value))
#Tally output coins.
output_total = decimal.Decimal(0)
for vout in tx.vout:
output_value = decimal.Decimal(str_money_value(vout.nValue))
output_total += output_value
#TX fees are the difference between the source and
fees = input_total - output_total
#Return totals and fees.
return [input_total, output_total, fees]
def getrawtransaction(self, txid, verbose=False):
"""Return transaction with hash txid
Raises IndexError if transaction not found.
verbose - If true a dict is returned instead with additional
information on the transaction.
Note that if all txouts are spent and the transaction index is not
enabled the transaction may not be available.
"""
try:
r = self._call("getrawtransaction", b2lx(txid), 1 if verbose else 0)
except JSONRPCError as ex:
raise IndexError(
"%s.getrawtransaction(): %s (%d)" % (self.__class__.__name__, ex.error["message"], ex.error["code"])
)
if verbose:
r["tx"] = CTransaction.deserialize(unhexlify(r["hex"]))
del r["hex"]
del r["txid"]
del r["version"]
del r["locktime"]
del r["vin"]
del r["vout"]
r["blockhash"] = lx(r["blockhash"]) if "blockhash" in r else None
else:
r = CTransaction.deserialize(unhexlify(r))
return r
def getrawtransaction(self, txid, verbose=False):
"""Return transaction with hash txid
Raises IndexError if transaction not found.
verbse - If true a dict is returned instead with additional information
on the transaction.
Note that if all txouts are spent and the transaction index is not
enabled the transaction may not be available.
"""
try:
r = self._call('getrawtransaction', b2lx(txid), 1 if verbose else 0)
except JSONRPCException as ex:
raise IndexError('%s.getrawtransaction(): %s (%d)' %
(self.__class__.__name__, ex.error['message'], ex.error['code']))
if verbose:
r['tx'] = CTransaction.deserialize(unhexlify(r['hex']))
del r['hex']
del r['txid']
del r['version']
del r['locktime']
del r['vin']
del r['vout']
r['blockhash'] = lx(r['blockhash']) if 'blockhash' in r else None
else:
r = CTransaction.deserialize(unhexlify(r))
return r
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 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 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 check_refund_works(self, tx_hex, owner_first_sig, owner_second_sig, recipient_sig, actor):
global error_log_path
try:
tx = CTransaction.deserialize(binascii.unhexlify(tx_hex))
redeem_script = bond_redeem_script(self.ecdsa_us, self.ecdsa_them, self.factory.ecdsa_arbiters[0], actor)
redeem_script_hash160 = hash160_script(redeem_script)
print(tx_hex)
print(redeem_script)
tx.vin[0].scriptSig = CScript([OP_0, owner_first_sig, owner_second_sig, recipient_sig, redeem_script["bin"]])
p2sh_script_pub_key = CScript([OP_HASH160, redeem_script_hash160["bin"], OP_EQUAL])
print(redeem_script_hash160)
VerifyScript(tx.vin[0].scriptSig, p2sh_script_pub_key, tx, 0, (SCRIPT_VERIFY_P2SH,))
signed_tx_hex = b2x(tx.serialize())
return {
"tx_hex": signed_tx_hex,
"txid": calculate_txid(signed_tx_hex)
}
except Exception as e:
error = parse_exception(e)
log_exception(error_log_path, error)
print(error)
print("Check refund failed.")
return None
def provide_transaction(self, transaction_data):
self.send_lock.acquire()
if self.send_transaction_cache.contains(transaction_data):
self.send_lock.release()
return
if len(transaction_data) > self.MAX_RELAY_TRANSACTION_BYTES and (len(transaction_data) > self.MAX_RELAY_OVERSIZE_TRANSACTION_BYTES or self.send_transaction_cache.get_flag_count() >= MAX_EXTRA_OVERSIZE_TRANSACTIONS):
self.send_lock.release()
return
try:
relay_data = pack('>3I', self.MAGIC_BYTES, self.TRANSACTION_TYPE, len(transaction_data))
relay_data += transaction_data
self.relay_sock.sendall(relay_data)
self.send_transaction_cache.add(transaction_data, len(transaction_data) > self.MAX_RELAY_OVERSIZE_TRANSACTION_BYTES)
if deserialize_utils:
transaction = CTransaction.deserialize(transaction_data)
print("Sent transaction " + str(b2lx(transaction.GetHash())) + " of size " + str(len(transaction_data)))
else:
print("Sent transaction of size " + str(len(transaction_data)))
except (OSError, socket.error) as err:
print("Failed to send to relay node: ", err)
self.send_lock.release()
def cmd_mkwitness(args):
tx = None
if args.tx is not None:
serialized_tx = args.tx
tx = CTransaction.deserialize(serialized_tx)
else:
tx = args.proxy.getrawtransaction(args.txid)
txproof = TxProof(tx=tx)
for seal_fd in args.seal_fds:
seal = BitcoinSingleUseSeal.deserialize(seal_fd.read())
txinproof = None
txoutproof = None
for i, txin in enumerate(txproof.tx.vin):
if txin.prevout == seal.outpoint:
txinproof = TxInProof(i=i, txproof=txproof)
txoutproof = TxOutProof(i=0, txproof=txproof)
break
else:
args.parser.error("Seal '%s' not closed by this transaction" % seal_fd.name)
witness = BitcoinSealWitness(seal=seal, txinproof=txinproof, txoutproof=txoutproof)
witness_filename = seal_fd.name + '.witness'
logging.info("Creating witness file '%s'" % witness_filename)
with open(seal_fd.name + '.witness', 'xb') as witness_fd:
witness_fd.write(witness.serialize())
class msg_tx(MsgSerializable):
command = b"tx"
def __init__(self, protover=PROTO_VERSION):
super(msg_tx, self).__init__(protover)
self.tx = CTransaction()
@classmethod
def msg_deser(cls, f, protover=PROTO_VERSION):
c = cls()
c.tx = CTransaction.stream_deserialize(f)
return c
def msg_ser(self, f):
self.tx.stream_serialize(f)
def __repr__(self):
return "msg_tx(tx=%s)" % (repr(self.tx))
def createrawtransaction(self, *args):
"""Get rawtransactions when provided vin and vout
FIXME: Implement options and accept outpoints instead of user args
"""
r = self._call('createrawtransaction', *args)
r = str(r)
tx = CTransaction.deserialize(unhexlify(r))
return tx
def signrawtransaction(self, tx, *args):
"""Sign inputs for transaction
FIXME: implement options
"""
hextx = hexlify(tx.serialize())
r = self._call('signrawtransaction', hextx, *args)
r['tx'] = CTransaction.deserialize(unhexlify(r['hex']))
del r['hex']
return r
def sign_refund_tx(self, tx_hex, key_no=1, actor="us"):
key_no -= 1
if key_no == 0:
ecdsa = self.ecdsa_us[0]
if key_no == 1:
ecdsa = self.ecdsa_us[1]
tx = CTransaction.deserialize(binascii.unhexlify(tx_hex))
sighash = SignatureHash(bond_redeem_script(self.ecdsa_us, self.ecdsa_them, self.factory.ecdsa_arbiters[0], actor)["bin"], tx, 0, SIGHASH_ALL)
seckey = CBitcoinSecret.from_secret_bytes(ecdsa.get_private_key("bin"), compressed=True)
sig = seckey.sign(sighash) + bytes([SIGHASH_ALL])
return sig
def mutate_tx(tx_hex):
"""
Mutates a raw transaction using TX malleability in the scriptSig (specifically, the OP codes.) This function shouldn't be used beyond testing as it uses an ugly eval() hack.
https://en.bitcoin.it/wiki/Transaction_Malleability
"""
tx = CTransaction.deserialize(binascii.unhexlify(tx_hex))
script_sig = repr(tx.vin[0].scriptSig)[9:]
script_sig = eval("CScript([OP_1, OP_DROP, " + script_sig)
tx.vin[0].scriptSig = script_sig
return b2x(tx.serialize())
def mutate_tx(tx_hex):
"""
Mutates a raw transaction using TX malleability in the scriptSig (specifically, the OP codes.) This function shouldn't be used beyond testing as it uses an ugly eval() hack.
https://en.bitcoin.it/wiki/Transaction_Malleability
"""
tx = CTransaction.deserialize(binascii.unhexlify(tx_hex))
script_sig = repr(tx.vin[0].scriptSig)[9:]
script_sig = eval("CScript([OP_1, OP_DROP, " + script_sig)
tx.vin[0].scriptSig = script_sig
return b2x(tx.serialize())
def __init__(self, nVersion=2, hashPrevBlock=b'\x00'*32,
hashMerkleRoot=b'\x00'*32, nTime=0, nBits=0, nNonce=0,
auxpow=None, vtx=()):
"""Create a new block"""
super(CAltcoinBlock, self).__init__(nVersion, hashPrevBlock,
hashMerkleRoot, nTime, nBits,
nNonce, auxpow)
vMerkleTree = tuple(bitcoin.core.CBlock.build_merkle_tree_from_txs(vtx))
object.__setattr__(self, 'vMerkleTree', vMerkleTree)
object.__setattr__(self, 'vtx', tuple(CTransaction.from_tx(tx)
for tx in vtx))
def __init__(self, nVersion=2, hashPrevBlock=b'\x00'*32,
hashMerkleRoot=b'\x00'*32, nTime=0, nBits=0, nNonce=0,
auxpow=None, vtx=()):
"""Create a new block"""
super(CAltcoinBlock, self).__init__(nVersion, hashPrevBlock,
hashMerkleRoot, nTime, nBits,
nNonce, auxpow)
vMerkleTree = tuple(bitcoin.core.CBlock.build_merkle_tree_from_txs(vtx))
object.__setattr__(self, 'vMerkleTree', vMerkleTree)
object.__setattr__(self, 'vtx', tuple(CTransaction.from_tx(tx)
for tx in vtx))
def set_tx(self):
"""Set the spending transaction and (en|dis)able the input index box."""
txt = str(self.tx_edit.toPlainText())
if not txt:
self.tx = None
self.input_idx.setEnabled(False)
self.tx_edit.setToolTip('')
return
self.tx = CTransaction.deserialize(txt.decode('hex'))
self.tx_edit.setToolTip(''.join(['Tx ID: ', bitcoin.core.b2lx(self.tx.GetHash())]))
self.input_idx.setRange(0, len(self.tx.vin) - 1)
self.input_idx.setEnabled(True)
def signrawtransaction(self, tx, *args):
"""Sign inputs for transaction
FIXME: implement options
"""
if getattr(tx, "serialize", None) is not None:
hextx = hexlify(tx.serialize())
else:
# then assume we got a raw string already
hextx = tx
r = self._call('signrawtransaction', hextx, *args)
r['tx'] = CTransaction.deserialize(unhexlify(r['hex']))
del r['hex']
return r
def sign_setup_tx(tx_hex, redeem_script, ecdsa):
tx = CTransaction.deserialize(binascii.unhexlify(tx_hex))
sighash = SignatureHash(redeem_script["bin"], tx, 0, SIGHASH_ALL)
print(b"Signing = " + sighash)
print(ecdsa.get_public_key())
seckey = CBitcoinSecret.from_secret_bytes(ecdsa.get_private_key("bin"), compressed=True)
sig = seckey.sign(sighash) + bytes([SIGHASH_ALL])
print(b"Pub key = " + ecdsa.get_public_key("bin"))
print(b"Sig = " + sig)
print()
return sig
def recover_command(args):
args.fee_per_kb = int(args.fee_per_kb * COIN)
addr = CBitcoinAddress(args.addr)
tx = CTransaction()
sum_value_in = 0
dummy_scriptSig = CScript([b'\x00'*74])
inputs = {}
for outpoint, txout in tuple(args.wallet.unspent_txouts.items())[0:500]:
sum_value_in += txout.nValue
tx.vin.append(CTxIn(outpoint, dummy_scriptSig))
inputs[outpoint] = txout
tx.vout.append(CTxOut(-1, addr.to_scriptPubKey()))
fees = int((len(tx.serialize())/1000) * args.fee_per_kb)
tx.vout[0].nValue = sum_value_in - fees
# Sign the transaction
for (i, txin) in enumerate(tx.vin):
prevout_scriptPubKey = inputs[txin.prevout].scriptPubKey
sighash = SignatureHash(prevout_scriptPubKey, tx, i, SIGHASH_ALL)
seckey = args.wallet.keypairs[prevout_scriptPubKey]
sig = seckey.sign(sighash) + bytes([SIGHASH_ALL])
if prevout_scriptPubKey[-1] == OP_CHECKMULTISIG:
txin.scriptSig = CScript([OP_0, sig])
elif prevout_scriptPubKey[-1] == OP_CHECKSIG and prevout_scriptPubKey[-2] == OP_EQUALVERIFY:
txin.scriptSig = CScript([sig, seckey.pub])
VerifyScript(txin.scriptSig, prevout_scriptPubKey, tx, i)
print(b2x(tx.serialize()))
def get_utxo(self, address):
"""Gets all the Unspent Transaction Outs from a given <address>
"""
script_pubkey = CBitcoinAddress(address).to_scriptPubKey()
txs = self.get_response("blockchain.address.get_history", [address])
spent = {}
utxos = []
for tx in txs:
raw = self.get_raw_transaction(tx["tx_hash"], tx["height"])
data = CTransaction.deserialize(to_binary(raw))
for vin in data.vin:
spent[(to_little_endian_hex(vin.prevout.hash), vin.prevout.n)] = 1
for outindex, vout in enumerate(data.vout):
if vout.scriptPubKey == script_pubkey:
utxos += [(tx["tx_hash"], outindex, vout.nValue, to_hex(vout.scriptPubKey))]
return [u for u in utxos if not u[0:2] in spent]
def get_utxo(self, address):
script_pubkey = CBitcoinAddress(address).to_scriptPubKey()
txs = self.get_response('blockchain.address.get_history', [address])
spent = {}
utxos = []
for tx in txs:
print tx
raw = self.get_raw_transaction(tx['tx_hash'], tx['height'])
data = CTransaction.deserialize(to_binary(raw))
for vin in data.vin:
spent[(to_little_endian_hex(vin.prevout.hash),
vin.prevout.n)] = 1
for outindex, vout in enumerate(data.vout):
if vout.scriptPubKey == script_pubkey:
utxos += [(tx['tx_hash'], outindex, vout.nValue,
to_hex(vout.scriptPubKey))]
return [u for u in utxos if not u[0:2] in spent]
def deserialize(self):
self.clear()
txt = str(self.raw_tx_edit.toPlainText())
try:
txt = txt.decode('hex')
except Exception:
self.status_message('Raw transaction must be hex.', True)
return
try:
self.tx = tx = CTransaction.deserialize(txt)
except Exception:
self.status_message('Cannot deserialize transaction.', True)
return
self.tx_widget.set_tx(tx)
self.status_message('Deserialized transaction {}'.format(bitcoin.core.b2lx(tx.GetHash())))
def spend_preimage(redeem_script, preimages, redeemer_sig, serial_tx):
"""
Creates a transaction fulfilling the redeem script of the preimage P2SH.
Arguements:
redeem_script (bytes): The script that specifies the conditions that a tx has
to fulfill to transfer funds from the `funding_tx`
preimages (list): The preimages that hash into the hash values
specified in the `redeem_script`
redeemer_sig (bytes): The signature of the redeemer on the `serial_tx`
serial_tx (bytes): The serial transaction
Returns:
The serial raw transaction that passes the script verification
"""
# Read in transaction
temp_tx = CTransaction.deserialize(serial_tx)
tx = CMutableTransaction.from_tx(temp_tx)
txin = tx.vin[0]
# Setup preimages in reverse order
script = []
for p in reversed(preimages):
script += [p]
# Create script sig
txin.scriptSig = CScript([redeemer_sig + '\x01'] + script +
[redeem_script])
# Verify script
redeem_script = CScript(redeem_script)
try:
VerifyScript(txin.scriptSig, redeem_script.to_p2sh_scriptPubKey(), tx,
0, [SCRIPT_VERIFY_P2SH])
except ValidationError:
print("spend_preimage: Script failed to verify")
return None
serial_tx = tx.serialize()
txid = b2lx(Hash(serial_tx))
print("spend_preimage: TXID is %s" % txid)
print("spend_preimage: RAW TX is %s" % b2x(serial_tx))
return serial_tx
def test_path_from_msg_to_txid(self):
def T(msg, tx):
path = path_from_msg_to_txid(msg, tx)
self.assertEqual(path(msg), tx.GetHash())
tx = CTransaction.deserialize(x('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'))
# txid in vin
T(lx('c71b3fbb0fc09688d230748a9b5b7df2d00d86d3b162e1d97f5433c1e0c953e8'), tx)
# part of a script
T(x('1d87f0a54a1d704ffc70eae83b025698bc0fdcfc'), tx)
# beginning of the tx
T(x('0100000001e853c9e0c133547fd9'), tx)
# end of the tx
T(x('98bc0fdcfc88ac00000000'), tx)
def spend_escrow(redeem_script, payer_sig, redeemer_sig, serial_tx):
"""
Creates a transaction fulfilling the redeem script of the escrow P2SH.
Arguements:
redeem_script (bytes): The script that specifies the conditions that a tx has
to fulfill to transfer funds from the `funding_tx`
payer_sig (bytes): The signature of the payer on the `serial_tx`
redeemer_sig (bytes): The signature of the redeemer on the `serial_tx`
serial_tx (bytes): The serial transaction
Returns:
The serial raw transaction that passes the script verification
"""
# Read in transaction
temp_tx = CTransaction.deserialize(serial_tx)
tx = CMutableTransaction.from_tx(temp_tx)
txin = tx.vin[0]
# Set script sig
txin.scriptSig = CScript(
[OP_0, payer_sig + '\x01', redeemer_sig + '\x01', redeem_script])
# Verify script
redeem_script = CScript(redeem_script)
serial_tx = tx.serialize()
try:
VerifyScript(txin.scriptSig, redeem_script.to_p2sh_scriptPubKey(), tx,
0, [SCRIPT_VERIFY_P2SH])
except ValidationError:
print("spend_escrow: Script failed to verify")
return None
serial_tx = tx.serialize()
txid = b2lx(Hash(serial_tx))
print("spend_escrow: TXID is %s" % txid)
print("spend_escrow: RAW TX is %s" % b2x(serial_tx))
return serial_tx
def broadcast_tx(self, tx):
"""
Sends the tx to half our peers and waits for half of the remainder to
announce it via inv packets before calling back.
"""
def on_peer_anncounce(txid):
self.subscriptions[txhash]["announced"] += 1
if self.subscriptions[txhash]["announced"] >= self.subscriptions[txhash]["ann_threshold"]:
if self.subscriptions[txid]["timeout"].active():
self.subscriptions[txid]["timeout"].cancel()
self.subscriptions[txid]["deferred"].callback(True)
d = defer.Deferred()
transaction = CTransaction.stream_deserialize(BytesIO(unhexlify(tx)))
txhash = transaction.GetHash()
self.inventory[txhash] = transaction
cinv = CInv()
cinv.type = 1
cinv.hash = txhash
inv_packet = msg_inv()
inv_packet.inv.append(cinv)
self.bloom_filter.insert(txhash)
self.subscriptions[txhash] = {
"announced": 0,
"ann_threshold": len(self.peers)/4,
"callback": on_peer_anncounce,
"confirmations": 0,
"in_blocks": [],
"deferred": d,
"timeout": reactor.callLater(10, d.callback, False)
}
for peer in self.peers[len(self.peers)/2:]:
peer.protocol.load_filter()
for peer in self.peers[:len(self.peers)/2]:
peer.protocol.send_message(inv_packet)
return d
def test_is_coinbase(self):
tx = CTransaction()
self.assertFalse(tx.is_coinbase())
tx.vin.append(CTxIn())
# IsCoinBase() in reference client doesn't check if vout is empty
self.assertTrue(tx.is_coinbase())
tx.vin[0].prevout.n = 0
self.assertFalse(tx.is_coinbase())
tx.vin[0] = CTxIn()
tx.vin.append(CTxIn())
self.assertFalse(tx.is_coinbase())
def load_test_vectors(name):
with open(os.path.dirname(__file__) + '/data/' + name, 'r') as fd:
for test_case in json.load(fd):
# Comments designated by single length strings
if len(test_case) == 1:
continue
assert len(test_case) == 3
prevouts = {}
for json_prevout in test_case[0]:
assert len(json_prevout) == 3
n = json_prevout[1]
if n == -1:
n = 0xffffffff
prevout = COutPoint(lx(json_prevout[0]), n)
prevouts[prevout] = parse_script(json_prevout[2])
tx = CTransaction.deserialize(x(test_case[1]))
enforceP2SH = test_case[2]
yield (prevouts, tx, enforceP2SH)
def SignatureHash(script, txTo, inIdx, hashtype):
if inIdx >= len(txTo.vin):
return (0, "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 (0, "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 fundrawtransaction(self, tx, include_watching=False):
"""Add inputs to a transaction until it has enough in value to meet its out value.
include_watching - Also select inputs which are watch only
Returns dict:
{'tx': Resulting tx,
'fee': Fee the resulting transaction pays,
'changepos': Position of added change output, or -1,
}
"""
hextx = hexlify(tx.serialize())
r = self._call('fundrawtransaction', hextx, include_watching)
r['tx'] = CTransaction.deserialize(unhexlify(r['hex']))
del r['hex']
r['fee'] = int(r['fee'] * COIN)
return r
def load_test_vectors(name):
with open(os.path.dirname(__file__) + '/data/' + name, 'r') as fd:
for test_case in json.load(fd):
# Comments designated by single length strings
if len(test_case) == 1:
continue
assert len(test_case) == 3
prevouts = {}
for json_prevout in test_case[0]:
assert len(json_prevout) == 3
n = json_prevout[1]
if n == -1:
n = 0xffffffff
prevout = COutPoint(lx(json_prevout[0]), n)
prevouts[prevout] = parse_script(json_prevout[2])
tx = CTransaction.deserialize(x(test_case[1]))
enforceP2SH = test_case[2]
yield (prevouts, tx, enforceP2SH)
def check_setup_works(tx_hex, redeem_script, owner_first_sig, owner_second_sig, third_party_sig):
try:
tx = CTransaction.deserialize(binascii.unhexlify(tx_hex))
redeem_script_hash160 = hash160_script(redeem_script)
if owner_first_sig != None and owner_second_sig != None and third_party_sig != None:
tx.vin[0].scriptSig = CScript([OP_0, owner_first_sig, owner_second_sig, third_party_sig, redeem_script["bin"]])
p2sh_script_pub_key = CScript([OP_HASH160, redeem_script_hash160["bin"], OP_EQUAL])
VerifyScript(tx.vin[0].scriptSig, p2sh_script_pub_key, tx, 0, (SCRIPT_VERIFY_P2SH,))
signed_tx_hex = b2x(tx.serialize())
return {
"tx_hex": signed_tx_hex,
"txid": calculate_txid(signed_tx_hex)
}
except Exception as e:
error = parse_exception(e)
log_exception(error_log_path, error)
print(error)
print("Check setup works failed.")
print(e)
return None
def deserialize_raw_transaction(raw_transaction: str) -> CTransaction:
'''
Checking if transaction can be deserialized (is not corrupted).
Args:
raw_transaction (str): transaction to check
Returns:
CTransaction: transaction object
Raises:
ImpossibleDeserialization: when transaction is corrupted
Example:
>>> from clove.network import Litecoin
>>> network = Litecoin()
>>> network.deserialize_raw_transaction('0100000001aa25fd5f63cb41d6ee7dd495256046b4c3f17d4540a1b258a06bfefac30da60900000000fdff0047304402201c8869d359b5599ecffd51a96f0a8799392c98c4e15242762ba455e37b1f5d6302203f2974e9afc8d641f9363167df48e5a845a8deba1381bf5a1b549ac04718a1ac01410459cdb91eb7298bc2578dc4e7ac2109ac3cfd9dc9818795c5583e720d2114d540724bf26b4541f683ff51968db627a04eecd1f5cff615b6350dad5fb595f8adf420c480afb333623864901c968022a07dd93fe3c06f5684ea728b8113e17fa91bd9514c5163a61450314a793bf317665ecdc54c2e843bb106aeee158876a91485c0522f6e23beb11cc3d066cd20ed732648a4e66704926db75bb17576a914621f617c765c3caa5ce1bb67f6a3e51382b8da296888ac00000000015a7b0100000000001976a91485c0522f6e23beb11cc3d066cd20ed732648a4e688ac00000000') # noqa: E501
CTransaction((CTxIn(COutPoint(lx('09a60dc3fafe6ba058b2a140457df1c3b446602595d47deed641cb635ffd25aa'), 0), CScript([x('304402201c8869d359b5599ecffd51a96f0a8799392c98c4e15242762ba455e37b1f5d6302203f2974e9afc8d641f9363167df48e5a845a8deba1381bf5a1b549ac04718a1ac01'), x('0459cdb91eb7298bc2578dc4e7ac2109ac3cfd9dc9818795c5583e720d2114d540724bf26b4541f683ff51968db627a04eecd1f5cff615b6350dad5fb595f8adf4'), x('c480afb333623864901c968022a07dd93fe3c06f5684ea728b8113e17fa91bd9'), 1, x('63a61450314a793bf317665ecdc54c2e843bb106aeee158876a91485c0522f6e23beb11cc3d066cd20ed732648a4e66704926db75bb17576a914621f617c765c3caa5ce1bb67f6a3e51382b8da296888ac')]), 0x0),), (CTxOut(0.00097114*COIN, CScript([OP_DUP, OP_HASH160, x('85c0522f6e23beb11cc3d066cd20ed732648a4e6'), OP_EQUALVERIFY, OP_CHECKSIG])),), 0, 1, CTxWitness()) # noqa: E501
'''
try:
return CTransaction.deserialize(x(raw_transaction))
except Exception:
raise ImpossibleDeserialization()
def add_input(self,
serial_id: int,
prevtx: str,
prevtx_vout: int,
max_witness_len: int,
script: str,
sequence: int,
privkey: str = None) -> None:
# Find the txid of the transaction
prev_tx = CTransaction.deserialize(bytes.fromhex(prevtx))
txin = CTxIn(COutPoint(prev_tx.GetTxid(), prevtx_vout),
nSequence=sequence)
# Get the previous output for its outscript + value
prev_vout = prev_tx.vout[prevtx_vout]
self.inputs.append({'input': txin,
'serial_id': serial_id,
'sats': prev_vout.nValue,
'prev_outscript': prev_vout.scriptPubKey.hex(),
'redeemscript': script,
'max_witness_len': max_witness_len,
'privkey': privkey,
})
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