def doit(num_ins, num_outs, fat=0):
psbt = BasicPSBT()
txn = Tx(2, [], [])
for i in range(num_ins):
h = TxIn(pack('4Q', 0, 0, 0, i), i)
txn.txs_in.append(h)
for i in range(num_outs):
# random P2PKH
scr = bytes([0x76, 0xa9, 0x14]) + pack(
'I', i + 1) + bytes(16) + bytes([0x88, 0xac])
h = TxOut((1E6 * i) if i else 1E8, scr)
txn.txs_out.append(h)
with BytesIO() as b:
txn.stream(b)
psbt.txn = b.getvalue()
psbt.inputs = [BasicPSBTInput(idx=i) for i in range(num_ins)]
psbt.outputs = [BasicPSBTOutput(idx=i) for i in range(num_outs)]
if fat:
for i in range(num_ins):
psbt.inputs[i].utxo = os.urandom(fat)
rv = BytesIO()
psbt.serialize(rv)
assert rv.tell() <= MAX_TXN_LEN, 'too fat'
return rv.getvalue()
def spend_outputs(funding_psbt, finalized_txn, tweaker=None):
# take details from PSBT that created a finalized txn (also provided)
# and build a new PSBT that spends those change outputs.
from pycoin.tx.Tx import Tx
from pycoin.tx.TxOut import TxOut
from pycoin.tx.TxIn import TxIn
funding = Tx.from_bin(finalized_txn)
b4 = BasicPSBT().parse(funding_psbt)
# segwit change outputs only
spendables = [(n, i) for n, i in enumerate(funding.tx_outs_as_spendable())
if i.script[0:2] == b'\x00\x14' and b4.outputs[n].bip32_paths
]
#spendables = list(reversed(spendables))
random.shuffle(spendables)
if tweaker:
tweaker(spendables)
nn = BasicPSBT()
nn.inputs = [BasicPSBTInput(idx=i) for i in range(len(spendables))]
nn.outputs = [BasicPSBTOutput(idx=0)]
# copy input values from funding PSBT's output side
for p_in, (f_out, sp) in zip(nn.inputs,
[(b4.outputs[x], s) for x, s in spendables]):
p_in.bip32_paths = f_out.bip32_paths
p_in.witness_script = f_out.redeem_script
with BytesIO() as fd:
sp.stream(fd)
p_in.witness_utxo = fd.getvalue()
# build new txn: single output, no change, no miner fee
act_scr = fake_dest_addr('p2wpkh')
dest_out = TxOut(sum(s.coin_value for n, s in spendables), act_scr)
txn = Tx(2, [s.tx_in() for _, s in spendables], [dest_out])
# put unsigned TXN into PSBT
with BytesIO() as b:
txn.stream(b)
nn.txn = b.getvalue()
with BytesIO() as rv:
nn.serialize(rv)
raw = rv.getvalue()
open('debug/spend_outs.psbt', 'wb').write(raw)
return nn, raw
def main():
the_hash = sys.argv[1]
j = get_json_for_hash(the_hash)
txs_in = []
for j_in in j.get("in"):
txs_in.append(TxIn(h2b_rev(j_in["prev_out"]["hash"]), int(j_in["prev_out"]["n"]), tools.compile(j_in["scriptSig"])))
txs_out = []
for j_out in j.get("out"):
txs_out.append(TxOut(int(float(j_out["value"]) * 1e8 + 0.5), tools.compile(j_out["scriptPubKey"])))
tx = Tx(int(j["ver"]), txs_in, txs_out, int(j["lock_time"]))
assert tx.id() == the_hash
s = io.BytesIO()
tx.stream(s)
v = s.getvalue()
print(linebreak(binascii.b2a_base64(v).decode("utf8"), 72))
def main():
the_hash = sys.argv[1]
j = get_json_for_hash(the_hash)
txs_in = []
for j_in in j.get("in"):
txs_in.append(
TxIn(h2b_rev(j_in["prev_out"]["hash"]), int(j_in["prev_out"]["n"]),
tools.compile(j_in["scriptSig"])))
txs_out = []
for j_out in j.get("out"):
txs_out.append(
TxOut(int(float(j_out["value"]) * 1e8 + 0.5),
tools.compile(j_out["scriptPubKey"])))
tx = Tx(int(j["ver"]), txs_in, txs_out, int(j["lock_time"]))
assert tx.id() == the_hash
s = io.BytesIO()
tx.stream(s)
v = s.getvalue()
print(linebreak(binascii.b2a_base64(v).decode("utf8"), 72))
def doit(num_ins, num_outs, master_xpub, subpath="0/%d", fee=10000):
psbt = BasicPSBT()
txn = Tx(2, [], [])
# we have a key; use it to provide "plausible" value inputs
from pycoin.key.BIP32Node import BIP32Node
mk = BIP32Node.from_wallet_key(master_xpub)
xfp = mk.fingerprint()
psbt.inputs = [BasicPSBTInput(idx=i) for i in range(num_ins)]
psbt.outputs = [BasicPSBTOutput(idx=i) for i in range(num_outs)]
for i in range(num_ins):
# make a fake txn to supply each of the inputs
# - each input is 1BTC
# addr where the fake money will be stored.
subkey = mk.subkey_for_path(subpath % i)
sec = subkey.sec()
assert len(sec) == 33, "expect compressed"
assert subpath[0:2] == '0/'
psbt.inputs[i].bip32_paths[sec] = xfp + pack('<II', 0, i)
# UTXO that provides the funding for to-be-signed txn
supply = Tx(2, [TxIn(pack('4Q', 0xdead, 0xbeef, 0, 0), 73)], [])
scr = bytes([0x76, 0xa9, 0x14]) + subkey.hash160() + bytes(
[0x88, 0xac])
supply.txs_out.append(TxOut(1E8, scr))
with BytesIO() as fd:
supply.stream(fd)
psbt.inputs[i].utxo = fd.getvalue()
if 0:
with BytesIO() as fd:
supply.stream(fd, include_witness_data=True)
psbt.inputs[i].witness_utxo = fd.getvalue()
spendable = TxIn(supply.hash(), 0)
txn.txs_in.append(spendable)
for i in range(num_outs):
# random P2PKH
scr = bytes([0x76, 0xa9, 0x14]) + pack(
'I', i + 1) + bytes(16) + bytes([0x88, 0xac])
h = TxOut(round(((1E8 * num_ins) - fee) / num_outs, 4), scr)
txn.txs_out.append(h)
with BytesIO() as b:
txn.stream(b)
psbt.txn = b.getvalue()
rv = BytesIO()
psbt.serialize(rv)
assert rv.tell() <= MAX_TXN_LEN, 'too fat'
return rv.getvalue()
def doit(num_ins,
num_outs,
master_xpub,
subpath="0/%d",
fee=10000,
outvals=None,
segwit_in=False,
outstyles=['p2pkh'],
change_outputs=[]):
psbt = BasicPSBT()
txn = Tx(2, [], [])
# we have a key; use it to provide "plausible" value inputs
mk = BIP32Node.from_wallet_key(master_xpub)
xfp = mk.fingerprint()
psbt.inputs = [BasicPSBTInput(idx=i) for i in range(num_ins)]
psbt.outputs = [BasicPSBTOutput(idx=i) for i in range(num_outs)]
for i in range(num_ins):
# make a fake txn to supply each of the inputs
# - each input is 1BTC
# addr where the fake money will be stored.
subkey = mk.subkey_for_path(subpath % i)
sec = subkey.sec()
assert len(sec) == 33, "expect compressed"
assert subpath[0:2] == '0/'
psbt.inputs[i].bip32_paths[sec] = xfp + pack('<II', 0, i)
# UTXO that provides the funding for to-be-signed txn
supply = Tx(2, [TxIn(pack('4Q', 0xdead, 0xbeef, 0, 0), 73)], [])
scr = bytes([0x76, 0xa9, 0x14]) + subkey.hash160() + bytes(
[0x88, 0xac])
supply.txs_out.append(TxOut(1E8, scr))
with BytesIO() as fd:
if not segwit_in:
supply.stream(fd)
psbt.inputs[i].utxo = fd.getvalue()
else:
supply.txs_out[-1].stream(fd)
psbt.inputs[i].witness_utxo = fd.getvalue()
spendable = TxIn(supply.hash(), 0)
txn.txs_in.append(spendable)
for i in range(num_outs):
# random P2PKH
if not outstyles:
style = ADDR_STYLES[i % len(ADDR_STYLES)]
else:
style = outstyles[i % len(outstyles)]
if i in change_outputs:
scr, act_scr, isw, pubkey, sp = make_change_addr(mk, style)
psbt.outputs[i].bip32_paths[pubkey] = sp
else:
scr = act_scr = fake_dest_addr(style)
isw = ('w' in style)
#if style.endswith('sh'):
assert scr
act_scr = act_scr or scr
if isw:
psbt.outputs[i].witness_script = scr
elif style.endswith('sh'):
psbt.outputs[i].redeem_script = scr
if not outvals:
h = TxOut(round(((1E8 * num_ins) - fee) / num_outs, 4),
act_scr)
else:
h = TxOut(outvals[i], act_scr)
txn.txs_out.append(h)
with BytesIO() as b:
txn.stream(b)
psbt.txn = b.getvalue()
rv = BytesIO()
psbt.serialize(rv)
assert rv.tell() <= MAX_TXN_LEN, 'too fat'
return rv.getvalue()
def doit(num_ins, num_outs, M, keys, fee=10000,
outvals=None, segwit_in=False, outstyles=['p2pkh'], change_outputs=[],
incl_xpubs=False):
psbt = BasicPSBT()
txn = Tx(2,[],[])
if incl_xpubs:
# add global header with XPUB's
# - assumes BIP45
for xfp, m, sk in keys:
kk = pack('<II', xfp, 45|0x80000000)
psbt.xpubs.append( (sk.serialize(as_private=False), kk) )
psbt.inputs = [BasicPSBTInput(idx=i) for i in range(num_ins)]
psbt.outputs = [BasicPSBTOutput(idx=i) for i in range(num_outs)]
for i in range(num_ins):
# make a fake txn to supply each of the inputs
# - each input is 1BTC
# addr where the fake money will be stored.
addr, scriptPubKey, script, details = make_ms_address(M, keys, idx=i)
# lots of supporting details needed for p2sh inputs
if segwit_in:
psbt.inputs[i].witness_script = script
else:
psbt.inputs[i].redeem_script = script
for pubkey, xfp_path in details:
psbt.inputs[i].bip32_paths[pubkey] = b''.join(pack('<I', j) for j in xfp_path)
# UTXO that provides the funding for to-be-signed txn
supply = Tx(2,[TxIn(pack('4Q', 0xdead, 0xbeef, 0, 0), 73)],[])
supply.txs_out.append(TxOut(1E8, scriptPubKey))
with BytesIO() as fd:
if not segwit_in:
supply.stream(fd)
psbt.inputs[i].utxo = fd.getvalue()
else:
supply.txs_out[-1].stream(fd)
psbt.inputs[i].witness_utxo = fd.getvalue()
spendable = TxIn(supply.hash(), 0)
txn.txs_in.append(spendable)
for i in range(num_outs):
# random P2PKH
if not outstyles:
style = ADDR_STYLES[i % len(ADDR_STYLES)]
else:
style = outstyles[i % len(outstyles)]
if i in change_outputs:
addr, scriptPubKey, scr, details = \
make_ms_address(M, keys, idx=i, addr_fmt=unmap_addr_fmt[style])
for pubkey, xfp_path in details:
psbt.outputs[i].bip32_paths[pubkey] = b''.join(pack('<I', j) for j in xfp_path)
if 'w' in style:
psbt.outputs[i].witness_script = scr
if style.endswith('p2sh'):
psbt.outputs[i].redeem_script = b'\0\x20' + sha256(scr).digest()
elif style.endswith('sh'):
psbt.outputs[i].redeem_script = scr
else:
scr = fake_dest_addr(style)
assert scr
if not outvals:
h = TxOut(round(((1E8*num_ins)-fee) / num_outs, 4), scriptPubKey)
else:
h = TxOut(outvals[i], scriptPubKey)
txn.txs_out.append(h)
with BytesIO() as b:
txn.stream(b)
psbt.txn = b.getvalue()
rv = BytesIO()
psbt.serialize(rv)
assert rv.tell() <= MAX_TXN_LEN, 'too fat'
return rv.getvalue()
def _base_size(tx: Tx) -> int:
buffer = io.BytesIO() # type: io.BytesIO
tx.stream(buffer)
return len(buffer.getvalue())
def fake_txn(num_ins,
num_outs,
master_xpub=None,
subpath="0/%d",
fee=10000,
outvals=None,
segwit_in=False,
outstyles=['p2pkh'],
is_testnet=False,
change_style='p2pkh',
partial=False,
change_outputs=[]):
# make various size txn's ... completely fake and pointless values
# - but has UTXO's to match needs
# - input total = num_inputs * 1BTC
from pycoin.tx.Tx import Tx
from pycoin.tx.TxIn import TxIn
from pycoin.tx.TxOut import TxOut
from pycoin.serialize import h2b_rev
from struct import pack
psbt = BasicPSBT()
txn = Tx(2, [], [])
# we have a key; use it to provide "plausible" value inputs
mk = BIP32Node.from_wallet_key(master_xpub)
xfp = mk.fingerprint()
psbt.inputs = [BasicPSBTInput(idx=i) for i in range(num_ins)]
psbt.outputs = [BasicPSBTOutput(idx=i) for i in range(num_outs)]
outputs = []
for i in range(num_ins):
# make a fake txn to supply each of the inputs
# - each input is 1BTC
# addr where the fake money will be stored.
subkey = mk.subkey_for_path(subpath % i)
sec = subkey.sec()
assert len(sec) == 33, "expect compressed"
assert subpath[0:2] == '0/'
if partial and (i == 0):
psbt.inputs[i].bip32_paths[sec] = b'Nope' + pack('<II', 0, i)
else:
psbt.inputs[i].bip32_paths[sec] = xfp + pack('<II', 0, i)
# UTXO that provides the funding for to-be-signed txn
supply = Tx(2, [TxIn(pack('4Q', 0xdead, 0xbeef, 0, 0), 73)], [])
scr = bytes([0x76, 0xa9, 0x14]) + subkey.hash160() + bytes(
[0x88, 0xac])
supply.txs_out.append(TxOut(1E8, scr))
with BytesIO() as fd:
if not segwit_in:
supply.stream(fd)
psbt.inputs[i].utxo = fd.getvalue()
else:
supply.txs_out[-1].stream(fd)
psbt.inputs[i].witness_utxo = fd.getvalue()
spendable = TxIn(supply.hash(), 0)
txn.txs_in.append(spendable)
for i in range(num_outs):
is_change = False
# random P2PKH
if not outstyles:
style = ADDR_STYLES[i % len(ADDR_STYLES)]
else:
style = outstyles[i % len(outstyles)]
if i in change_outputs:
scr, act_scr, isw, pubkey, sp = make_change_addr(mk, change_style)
psbt.outputs[i].bip32_paths[pubkey] = sp
is_change = True
else:
scr = act_scr = fake_dest_addr(style)
isw = ('w' in style)
assert scr
act_scr = act_scr or scr
if isw:
psbt.outputs[i].witness_script = scr
elif style.endswith('sh'):
psbt.outputs[i].redeem_script = scr
if not outvals:
h = TxOut(round(((1E8 * num_ins) - fee) / num_outs, 4), act_scr)
else:
h = TxOut(outvals[i], act_scr)
outputs.append(
(Decimal(h.coin_value) / Decimal(1E8), act_scr, is_change))
txn.txs_out.append(h)
with BytesIO() as b:
txn.stream(b)
psbt.txn = b.getvalue()
rv = BytesIO()
psbt.serialize(rv)
return rv.getvalue(), [(n, render_address(s, is_testnet), ic)
for n, s, ic in outputs]
def main():
parser = create_parser()
args = parser.parse_args()
(txs, spendables, payables, key_iters, p2sh_lookup, tx_db,
warning_tx_cache, warning_tx_for_tx_hash,
warning_spendables) = parse_context(args, parser)
txs_in = []
txs_out = []
unspents = []
# we use a clever trick here to keep each tx_in corresponding with its tx_out
for tx in txs:
smaller = min(len(tx.txs_in), len(tx.txs_out))
txs_in.extend(tx.txs_in[:smaller])
txs_out.extend(tx.txs_out[:smaller])
unspents.extend(tx.unspents[:smaller])
for tx in txs:
smaller = min(len(tx.txs_in), len(tx.txs_out))
txs_in.extend(tx.txs_in[smaller:])
txs_out.extend(tx.txs_out[smaller:])
unspents.extend(tx.unspents[smaller:])
for spendable in spendables:
txs_in.append(spendable.tx_in())
unspents.append(spendable)
for address, coin_value in payables:
script = standard_tx_out_script(address)
txs_out.append(TxOut(coin_value, script))
lock_time = args.lock_time
version = args.transaction_version
# if no lock_time is explicitly set, inherit from the first tx or use default
if lock_time is None:
if txs:
lock_time = txs[0].lock_time
else:
lock_time = DEFAULT_LOCK_TIME
# if no version is explicitly set, inherit from the first tx or use default
if version is None:
if txs:
version = txs[0].version
else:
version = DEFAULT_VERSION
if args.remove_tx_in:
s = set(args.remove_tx_in)
txs_in = [tx_in for idx, tx_in in enumerate(txs_in) if idx not in s]
if args.remove_tx_out:
s = set(args.remove_tx_out)
txs_out = [
tx_out for idx, tx_out in enumerate(txs_out) if idx not in s
]
tx = Tx(txs_in=txs_in,
txs_out=txs_out,
lock_time=lock_time,
version=version,
unspents=unspents)
fee = args.fee
try:
if len(payables) > 0:
distribute_from_split_pool(tx, fee)
except ValueError as ex:
print("warning: %s" % ex.args[0], file=sys.stderr)
unsigned_before = tx.bad_signature_count()
unsigned_after = unsigned_before
if unsigned_before > 0 and key_iters:
def wif_iter(iters):
while len(iters) > 0:
for idx, iter in enumerate(iters):
try:
wif = next(iter)
yield wif
except StopIteration:
iters = iters[:idx] + iters[idx + 1:]
break
print("signing...", file=sys.stderr)
sign_tx(tx, wif_iter(key_iters), p2sh_lookup=p2sh_lookup)
unsigned_after = tx.bad_signature_count()
if unsigned_after > 0:
print("warning: %d TxIn items still unsigned" % unsigned_after,
file=sys.stderr)
if len(tx.txs_in) == 0:
print("warning: transaction has no inputs", file=sys.stderr)
if len(tx.txs_out) == 0:
print("warning: transaction has no outputs", file=sys.stderr)
include_unspents = (unsigned_after > 0)
tx_as_hex = tx.as_hex(include_unspents=include_unspents)
if args.output_file:
f = args.output_file
if f.name.endswith(".hex"):
f.write(tx_as_hex.encode("utf8"))
else:
tx.stream(f)
if include_unspents:
tx.stream_unspents(f)
f.close()
elif args.show_unspents:
for spendable in tx.tx_outs_as_spendable():
print(spendable.as_text())
else:
if not tx.missing_unspents():
check_fees(tx)
dump_tx(tx, args.network, args.verbose_signature, args.disassemble,
args.trace, args.pdb)
if include_unspents:
print(
"including unspents in hex dump since transaction not fully signed"
)
print(tx_as_hex)
if args.cache:
if tx_db is None:
warning_tx_cache = message_about_tx_cache_env()
warning_tx_for_tx_hash = message_about_tx_for_tx_hash_env(
args.network)
tx_db = get_tx_db(args.network)
tx_db.put(tx)
if args.bitcoind_url:
if tx_db is None:
warning_tx_cache = message_about_tx_cache_env()
warning_tx_for_tx_hash = message_about_tx_for_tx_hash_env(
args.network)
tx_db = get_tx_db(args.network)
validate_bitcoind(tx, tx_db, args.bitcoind_url)
if tx.missing_unspents():
print("\n** can't validate transaction as source transactions missing",
file=sys.stderr)
else:
try:
if tx_db is None:
warning_tx_cache = message_about_tx_cache_env()
warning_tx_for_tx_hash = message_about_tx_for_tx_hash_env(
args.network)
tx_db = get_tx_db(args.network)
tx.validate_unspents(tx_db)
print('all incoming transaction values validated')
except BadSpendableError as ex:
print("\n**** ERROR: FEES INCORRECTLY STATED: %s" % ex.args[0],
file=sys.stderr)
except Exception as ex:
print(
"\n*** can't validate source transactions as untampered: %s" %
ex.args[0],
file=sys.stderr)
# print warnings
for m in [warning_tx_cache, warning_tx_for_tx_hash, warning_spendables]:
if m:
print("warning: %s" % m, file=sys.stderr)
def calculate_tx_size(tx: Tx) -> int:
s = io.BytesIO()
tx.stream(s)
return len(s.getvalue())
