def a2b_hex(s):
return _a2b_hex(b(s))
def a2b_hex(s):
return _a2b_hex(s.encode('latin-1'))
def dump(psbt, hex_output, bin_output, testnet, base64, show_addrs):
raw = psbt.read()
if raw[0:10] == b'70736274ff':
raw = _a2b_hex(raw.strip())
if raw[0:6] == b'cHNidP':
raw = b64decode(raw)
#assert raw[0:5] == b'psbt\xff'
if hex_output:
print(b2a_hex(raw))
sys.exit(0)
if base64:
print(str(b64encode(raw), 'ascii'))
sys.exit(0)
print("%d bytes in PSBT: %s" % (len(raw), psbt.name))
if bin_output:
bin_output.write(raw)
sys.exit(0)
with io.BytesIO(raw) as fd:
hdr = fd.read(4)
sep1 = fd.read(1)
print("-- HEADER --\n\n%s 0x%02x\n" % (str(hdr, 'ascii'), sep1[0]))
print("-- GLOBALS --")
num_ins = None
num_outs = None
section = 'globals'
section_idx = 0
expect_outs = set()
while 1:
first = fd.read(1)
if first == b'':
print("-- ACTUAL EOF --")
break
try:
ks = deser_compact_size(fd, first[0])
except:
print("? confused at %d=0x%x" % (fd.tell(), fd.tell()))
break
if ks == 0:
section_idx += 1
if section == 'globals':
section_idx = 0
section = 'inputs'
print("-- INPUT #0 --")
elif section == 'inputs':
if section_idx == num_ins:
print("-- OUTPUT #0 --")
section = 'outputs'
section_idx = 0
else:
print("-- INPUT #%d --" % section_idx)
elif section == 'outputs':
if section_idx == num_outs:
print("-- EXPECT EOF --")
section = 'past eof'
section_idx = 0
else:
print("-- OUTPUT #%d --" % section_idx)
else:
print("-- ?? %s ?? --" % section.upper())
continue
try:
assert ks
key = fd.read(ks)
vs = deser_compact_size(fd)
assert vs
val = fd.read(vs)
except:
print("? confused at %d=0x%x" % (fd.tell(), fd.tell()))
break
try:
if section == 'globals':
purpose = ['GLOBAL_UNSIGNED_TX', 'GLOBAL_XPUB'][key[0]]
elif section == 'inputs':
purpose = [
'IN_NON_WITNESS_UTXO', 'IN_WITNESS_UTXO',
'IN_PARTIAL_SIG', 'IN_SIGHASH_TYPE',
'IN_REDEEM_SCRIPT', 'IN_WITNESS_SCRIPT',
'IN_BIP32_DERIVATION', 'IN_FINAL_SCRIPTSIG',
'IN_FINAL_SCRIPTWITNESS'
][key[0]]
elif section == 'outputs':
purpose = [
'OUT_REDEEM_SCRIPT', 'OUT_WITNESS_SCRIPT',
'OUT_BIP32_DERIVATION'
][key[0]]
except IndexError:
purpose = 'Unknown type=0x%0x' % key[0]
print('\n key: %02x ' % key[0], end='')
if len(key) <= 1:
print("(%s)" % purpose)
else:
print('%s\n (%s + %d bytes)' %
(b2a_hex(key[1:]), purpose, ks - 1))
print('value: ', end='')
if len(val) == 4 and key[0] != PSBT_GLOBAL_XPUB:
nn, = struct.unpack("<I", val)
print("'%s' = 0x%x = %d\n" % (b2a_hex(val), nn, nn))
continue
print('%s (%d bytes)\n' % (b2a_hex(val), vs))
# prefix byte for addresses in current network
ADP = b'\x6f' if testnet else b'\0'
if (section, key[0]) in [('globals', PSBT_GLOBAL_UNSIGNED_TX),
('inputs', PSBT_IN_NON_WITNESS_UTXO)]:
# Parse and sumarize the bitcoin transaction.
# - also works for non-witness UTXO
try:
t = Tx.parse(io.BytesIO(val))
print(" Transaction: (%d inputs, %d outputs, %d witness)" %
(len(t.txs_in), len(t.txs_out),
sum(1 for i in t.txs_in if i.witness)))
print(" : txid %s" % t.hash())
for n, i in enumerate(t.txs_in):
print(" [in #%d] %s" %
(n,
i.address(ADP) if i.script else '(not signed)'))
if section == 'globals':
print(" from %s : %d" %
(b2h_rev(i.previous_hash), i.previous_index))
for n, o in enumerate(t.txs_out):
out_addr = render_address(o.script, testnet)
print(" [out #%d] %.8f => %s" %
(n, o.coin_value / 1E8, out_addr))
expect_outs.add(out_addr)
print("\n")
if num_ins is None:
num_ins = len(t.txs_in)
num_outs = len(t.txs_out)
except:
print("(unable to parse txn)")
raise
if (section, key[0]) == ('globals', PSBT_GLOBAL_XPUB):
# key is: binary BIP32 serialization (not base58)
# value is: master key fingerprint catenated with the derivation path of public key
fingerprint = val[0:4]
if len(val) > 4:
path = [
struct.unpack_from('<I', val, offset=i)[0]
for i in range(4, len(val), 4)
]
path = [
str(i & 0x7fffffff) + ("'" if i & 0x80000000 else "")
for i in path
]
else:
# valid: no subpath, just xfp.
path = []
print(" XPUB: %s" % b2a_hashed_base58(key[1:]))
print(" HD Path: (m=%s)/%s\n" %
(xfp2hex(fingerprint), '/'.join(path)))
if (section, key[0]) in [('inputs', PSBT_IN_BIP32_DERIVATION),
('outputs', PSBT_OUT_BIP32_DERIVATION)]:
# HD key paths
try:
pubkey = key[1:]
fingerprint = val[0:4]
path = [
struct.unpack_from('<I', val, offset=i)[0]
for i in range(4, len(val), 4)
]
path = [
str(i & 0x7fffffff) + ("'" if i & 0x80000000 else "")
for i in path
]
# conservative: render them all, pick one found if expected
# - but not helpful for multisig, need to look around to know if thats the case
addrs = []
if show_addrs:
if len(pubkey) in {33, 65}:
# assume old skool b58 p2pkh, bitcoin mainnet, etc.
h20 = hash160(pubkey)
for prefix in [0, 111]:
addrs.append(
b2a_hashed_base58(bytes([prefix]) + h20))
for hrp in ['bc', 'tb']:
addrs.append(bech32_encode(hrp, 0,
h20)) # really?
match = set(addrs).intersection(expect_outs)
if match:
addrs = list(match)
print(" Pubkey: %s (%d bytes)" %
(b2a_hex(pubkey), len(pubkey)))
print(" HD Path: (m=%s)/%s" %
(xfp2hex(fingerprint), '/'.join(path)))
for addr in addrs:
print(" = %s" % addr)
print("\n")
except:
print("(unable to parse hdpath)")
if (section, key[0]) in [('inputs', PSBT_IN_REDEEM_SCRIPT),
('inputs', PSBT_IN_WITNESS_SCRIPT),
('outputs', PSBT_OUT_REDEEM_SCRIPT),
('outputs', PSBT_OUT_WITNESS_SCRIPT)]:
try:
if val[-1] == 0xAE and len(val) > 22:
M, N = (val[0] - 80, val[-2] - 80)
print(" P2SH Multisig: %d of %d" % (M, N))
print(" Pubkeys: ")
for idx in range(N):
pk = val[1 + (34 * idx):]
assert pk[0] == 0x21
print(" #%d: %s" %
(idx + 1, b2a_hex(pk[1:1 + 33])))
exp = ((N * 34) + 3)
if len(val) > exp:
print(" (plus JUNK: %d bytes)" %
(len(val) - exp))
print("\n")
# XXX decode implied p2sh addresses here too?
except:
print("(unable to parse POSSIBLE multisig redeem script)")
def a2b_hex(s):
return _a2b_hex(s.encode('latin-1'))
def a2b_hex(s):
return _a2b_hex(b(s))
