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This source code is embedded in Bitcoin transaction 4b72a223007eab8a951d43edc171befeabc7b5dca4213770c88e09ba5b936e17
#
# File insertion tool for Bitcoin
# Requires git://github.com/jgarzik/python-bitcoinrpc.git
#
# (c) 2013 Satoshi Nakamoto All Rights Reserved
#
# UNAUTHORIZED DUPLICATION AND/OR USAGE OF THIS PROGRAM IS PROHIBITED BY US AND INTERNATIONAL COPYRIGHT LAW
import io
import jsonrpc
import os
import random
import struct
import sys
from binascii import crc32,hexlify,unhexlify
from decimal import Decimal
if len(sys.argv) < 5:
print(\
"""\
Usage: %s <file> <dest addr> <dest amount> {<fee-per-kb>}
Set BTCRPCURL=http://user:pass@localhost:portnum""" % sys.argv[0], file=sys.stderr)
sys.exit()
COIN = 100000000
def unhexstr(str):
return unhexlify(str.encode('utf8'))
proxy = jsonrpc.ServiceProxy(os.environ['BTCRPCURL'])
def select_txins(value):
unspent = list(proxy.listunspent())
random.shuffle(unspent)
r = []
total = 0
for tx in unspent:
total += tx['amount']
r.append(tx)
if total >= value:
break
if total < value:
return None
else:
return (r, total)
def varint(n):
if n < 0xfd:
return bytes([n])
elif n < 0xffff:
return b'\xfd' + struct.pack('<H',n)
else:
assert False
def packtxin(prevout, scriptSig, seq=0xffffffff):
return prevout[0][::-1] + struct.pack('<L',prevout[1]) + varint(len(scriptSig)) + scriptSig + struct.pack('<L', seq)
def packtxout(value, scriptPubKey):
return struct.pack('<Q',int(value*COIN)) + varint(len(scriptPubKey)) + scriptPubKey
def packtx(txins, txouts, locktime=0):
r = b'\x01\x00\x00\x00' # version
r += varint(len(txins))
for txin in txins:
r += packtxin((unhexstr(txin['txid']),txin['vout']), b'')
r += varint(len(txouts))
for (value, scriptPubKey) in txouts:
r += packtxout(value, scriptPubKey)
r += struct.pack('<L', locktime)
return r
OP_CHECKSIG = b'\xac'
OP_CHECKMULTISIG = b'\xae'
OP_PUSHDATA1 = b'\x4c'
OP_DUP = b'\x76'
OP_HASH160 = b'\xa9'
OP_EQUALVERIFY = b'\x88'
def pushdata(data):
assert len(data) < OP_PUSHDATA1[0]
return bytes([len(data)]) + data
def pushint(n):
assert 0 < n <= 16
return bytes([0x51 + n-1])
def addr2bytes(s):
digits58 = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
n = 0
for c in s:
n *= 58
if c not in digits58:
raise ValueError
n += digits58.index(c)
h = '%x' % n
if len(h) % 2:
h = '0' + h
for c in s:
if c == digits58[0]:
h = '00' + h
else:
break
return unhexstr(h)[1:-4] # skip version and checksum
def checkmultisig_scriptPubKey_dump(fd):
data = fd.read(65*3)
if not data:
return None
r = pushint(1)
n = 0
while data:
chunk = data[0:65]
data = data[65:]
if len(chunk) < 33:
chunk += b'\x00'*(33-len(chunk))
elif len(chunk) < 65:
chunk += b'\x00'*(65-len(chunk))
r += pushdata(chunk)
n += 1
r += pushint(n) + OP_CHECKMULTISIG
return r
(txins, change) = select_txins(0)
txouts = []
data = open(sys.argv[1],'rb').read()
data = struct.pack('<L', len(data)) + struct.pack('<L', crc32(data)) + data
fd = io.BytesIO(data)
while True:
scriptPubKey = checkmultisig_scriptPubKey_dump(fd)
if scriptPubKey is None:
break
value = Decimal(1/COIN)
txouts.append((value, scriptPubKey))
change -= value
# dest output
out_value = Decimal(sys.argv[3])
change -= out_value
txouts.append((out_value, OP_DUP + OP_HASH160 + pushdata(addr2bytes(sys.argv[2])) + OP_EQUALVERIFY + OP_CHECKSIG))
# change output
change_addr = proxy.getnewaddress()
txouts.append([change, OP_DUP + OP_HASH160 + pushdata(addr2bytes(change_addr)) + OP_EQUALVERIFY + OP_CHECKSIG])
tx = packtx(txins, txouts)
signed_tx = proxy.signrawtransaction(hexlify(tx).decode('utf8'))
FEEPERKB = Decimal(0.001)
try:
FEEPERKB = Decimal(sys.argv[4])
except IndexError:
pass
fee = Decimal(len(signed_tx['hex'])/1000) * FEEPERKB
change -= fee
txouts[-1][0] = change
tx = packtx(txins, txouts)
signed_tx = proxy.signrawtransaction(hexlify(tx).decode('utf8'))
assert signed_tx['complete']
print('Size: %d Fee: %2.8f' % (len(signed_tx['hex'])/2,fee),file=sys.stderr)
if False:
print(proxy.sendrawtransaction(signed_tx['hex']))
else:
print(signed_tx)
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