319 lines
10 KiB
Python
319 lines
10 KiB
Python
# this code comes from ABE. it can probably be simplified
|
|
#
|
|
#
|
|
|
|
from bitcoin import public_key_to_bc_address, hash_160_to_bc_address, hash_encode
|
|
#import socket
|
|
import time
|
|
import struct
|
|
|
|
#
|
|
# Workalike python implementation of Bitcoin's CDataStream class.
|
|
#
|
|
import struct
|
|
import StringIO
|
|
import mmap
|
|
|
|
class SerializationError(Exception):
|
|
""" Thrown when there's a problem deserializing or serializing """
|
|
|
|
class BCDataStream(object):
|
|
def __init__(self):
|
|
self.input = None
|
|
self.read_cursor = 0
|
|
|
|
def clear(self):
|
|
self.input = None
|
|
self.read_cursor = 0
|
|
|
|
def write(self, bytes): # Initialize with string of bytes
|
|
if self.input is None:
|
|
self.input = bytes
|
|
else:
|
|
self.input += bytes
|
|
|
|
def map_file(self, file, start): # Initialize with bytes from file
|
|
self.input = mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ)
|
|
self.read_cursor = start
|
|
def seek_file(self, position):
|
|
self.read_cursor = position
|
|
def close_file(self):
|
|
self.input.close()
|
|
|
|
def read_string(self):
|
|
# Strings are encoded depending on length:
|
|
# 0 to 252 : 1-byte-length followed by bytes (if any)
|
|
# 253 to 65,535 : byte'253' 2-byte-length followed by bytes
|
|
# 65,536 to 4,294,967,295 : byte '254' 4-byte-length followed by bytes
|
|
# ... and the Bitcoin client is coded to understand:
|
|
# greater than 4,294,967,295 : byte '255' 8-byte-length followed by bytes of string
|
|
# ... but I don't think it actually handles any strings that big.
|
|
if self.input is None:
|
|
raise SerializationError("call write(bytes) before trying to deserialize")
|
|
|
|
try:
|
|
length = self.read_compact_size()
|
|
except IndexError:
|
|
raise SerializationError("attempt to read past end of buffer")
|
|
|
|
return self.read_bytes(length)
|
|
|
|
def write_string(self, string):
|
|
# Length-encoded as with read-string
|
|
self.write_compact_size(len(string))
|
|
self.write(string)
|
|
|
|
def read_bytes(self, length):
|
|
try:
|
|
result = self.input[self.read_cursor:self.read_cursor+length]
|
|
self.read_cursor += length
|
|
return result
|
|
except IndexError:
|
|
raise SerializationError("attempt to read past end of buffer")
|
|
|
|
return ''
|
|
|
|
def read_boolean(self): return self.read_bytes(1)[0] != chr(0)
|
|
def read_int16(self): return self._read_num('<h')
|
|
def read_uint16(self): return self._read_num('<H')
|
|
def read_int32(self): return self._read_num('<i')
|
|
def read_uint32(self): return self._read_num('<I')
|
|
def read_int64(self): return self._read_num('<q')
|
|
def read_uint64(self): return self._read_num('<Q')
|
|
|
|
def write_boolean(self, val): return self.write(chr(1) if val else chr(0))
|
|
def write_int16(self, val): return self._write_num('<h', val)
|
|
def write_uint16(self, val): return self._write_num('<H', val)
|
|
def write_int32(self, val): return self._write_num('<i', val)
|
|
def write_uint32(self, val): return self._write_num('<I', val)
|
|
def write_int64(self, val): return self._write_num('<q', val)
|
|
def write_uint64(self, val): return self._write_num('<Q', val)
|
|
|
|
def read_compact_size(self):
|
|
size = ord(self.input[self.read_cursor])
|
|
self.read_cursor += 1
|
|
if size == 253:
|
|
size = self._read_num('<H')
|
|
elif size == 254:
|
|
size = self._read_num('<I')
|
|
elif size == 255:
|
|
size = self._read_num('<Q')
|
|
return size
|
|
|
|
def write_compact_size(self, size):
|
|
if size < 0:
|
|
raise SerializationError("attempt to write size < 0")
|
|
elif size < 253:
|
|
self.write(chr(size))
|
|
elif size < 2**16:
|
|
self.write('\xfd')
|
|
self._write_num('<H', size)
|
|
elif size < 2**32:
|
|
self.write('\xfe')
|
|
self._write_num('<I', size)
|
|
elif size < 2**64:
|
|
self.write('\xff')
|
|
self._write_num('<Q', size)
|
|
|
|
def _read_num(self, format):
|
|
(i,) = struct.unpack_from(format, self.input, self.read_cursor)
|
|
self.read_cursor += struct.calcsize(format)
|
|
return i
|
|
|
|
def _write_num(self, format, num):
|
|
s = struct.pack(format, num)
|
|
self.write(s)
|
|
|
|
#
|
|
# enum-like type
|
|
# From the Python Cookbook, downloaded from http://code.activestate.com/recipes/67107/
|
|
#
|
|
import types, string, exceptions
|
|
|
|
class EnumException(exceptions.Exception):
|
|
pass
|
|
|
|
class Enumeration:
|
|
def __init__(self, name, enumList):
|
|
self.__doc__ = name
|
|
lookup = { }
|
|
reverseLookup = { }
|
|
i = 0
|
|
uniqueNames = [ ]
|
|
uniqueValues = [ ]
|
|
for x in enumList:
|
|
if type(x) == types.TupleType:
|
|
x, i = x
|
|
if type(x) != types.StringType:
|
|
raise EnumException, "enum name is not a string: " + x
|
|
if type(i) != types.IntType:
|
|
raise EnumException, "enum value is not an integer: " + i
|
|
if x in uniqueNames:
|
|
raise EnumException, "enum name is not unique: " + x
|
|
if i in uniqueValues:
|
|
raise EnumException, "enum value is not unique for " + x
|
|
uniqueNames.append(x)
|
|
uniqueValues.append(i)
|
|
lookup[x] = i
|
|
reverseLookup[i] = x
|
|
i = i + 1
|
|
self.lookup = lookup
|
|
self.reverseLookup = reverseLookup
|
|
def __getattr__(self, attr):
|
|
if not self.lookup.has_key(attr):
|
|
raise AttributeError
|
|
return self.lookup[attr]
|
|
def whatis(self, value):
|
|
return self.reverseLookup[value]
|
|
|
|
|
|
# This function comes from bitcointools, bct-LICENSE.txt.
|
|
def long_hex(bytes):
|
|
return bytes.encode('hex_codec')
|
|
|
|
# This function comes from bitcointools, bct-LICENSE.txt.
|
|
def short_hex(bytes):
|
|
t = bytes.encode('hex_codec')
|
|
if len(t) < 11:
|
|
return t
|
|
return t[0:4]+"..."+t[-4:]
|
|
|
|
|
|
|
|
def parse_TxIn(vds):
|
|
d = {}
|
|
d['prevout_hash'] = hash_encode(vds.read_bytes(32))
|
|
d['prevout_n'] = vds.read_uint32()
|
|
scriptSig = vds.read_bytes(vds.read_compact_size())
|
|
d['sequence'] = vds.read_uint32()
|
|
d['address'] = extract_public_key(scriptSig)
|
|
#d['script'] = decode_script(scriptSig)
|
|
return d
|
|
|
|
|
|
def parse_TxOut(vds, i):
|
|
d = {}
|
|
d['value'] = vds.read_int64()
|
|
scriptPubKey = vds.read_bytes(vds.read_compact_size())
|
|
d['address'] = extract_public_key(scriptPubKey)
|
|
#d['script'] = decode_script(scriptPubKey)
|
|
d['raw_output_script'] = scriptPubKey.encode('hex')
|
|
d['index'] = i
|
|
return d
|
|
|
|
|
|
def parse_Transaction(vds):
|
|
d = {}
|
|
start = vds.read_cursor
|
|
d['version'] = vds.read_int32()
|
|
n_vin = vds.read_compact_size()
|
|
d['inputs'] = []
|
|
for i in xrange(n_vin):
|
|
d['inputs'].append(parse_TxIn(vds))
|
|
n_vout = vds.read_compact_size()
|
|
d['outputs'] = []
|
|
for i in xrange(n_vout):
|
|
d['outputs'].append(parse_TxOut(vds, i))
|
|
d['lockTime'] = vds.read_uint32()
|
|
return d
|
|
|
|
|
|
|
|
|
|
opcodes = Enumeration("Opcodes", [
|
|
("OP_0", 0), ("OP_PUSHDATA1",76), "OP_PUSHDATA2", "OP_PUSHDATA4", "OP_1NEGATE", "OP_RESERVED",
|
|
"OP_1", "OP_2", "OP_3", "OP_4", "OP_5", "OP_6", "OP_7",
|
|
"OP_8", "OP_9", "OP_10", "OP_11", "OP_12", "OP_13", "OP_14", "OP_15", "OP_16",
|
|
"OP_NOP", "OP_VER", "OP_IF", "OP_NOTIF", "OP_VERIF", "OP_VERNOTIF", "OP_ELSE", "OP_ENDIF", "OP_VERIFY",
|
|
"OP_RETURN", "OP_TOALTSTACK", "OP_FROMALTSTACK", "OP_2DROP", "OP_2DUP", "OP_3DUP", "OP_2OVER", "OP_2ROT", "OP_2SWAP",
|
|
"OP_IFDUP", "OP_DEPTH", "OP_DROP", "OP_DUP", "OP_NIP", "OP_OVER", "OP_PICK", "OP_ROLL", "OP_ROT",
|
|
"OP_SWAP", "OP_TUCK", "OP_CAT", "OP_SUBSTR", "OP_LEFT", "OP_RIGHT", "OP_SIZE", "OP_INVERT", "OP_AND",
|
|
"OP_OR", "OP_XOR", "OP_EQUAL", "OP_EQUALVERIFY", "OP_RESERVED1", "OP_RESERVED2", "OP_1ADD", "OP_1SUB", "OP_2MUL",
|
|
"OP_2DIV", "OP_NEGATE", "OP_ABS", "OP_NOT", "OP_0NOTEQUAL", "OP_ADD", "OP_SUB", "OP_MUL", "OP_DIV",
|
|
"OP_MOD", "OP_LSHIFT", "OP_RSHIFT", "OP_BOOLAND", "OP_BOOLOR",
|
|
"OP_NUMEQUAL", "OP_NUMEQUALVERIFY", "OP_NUMNOTEQUAL", "OP_LESSTHAN",
|
|
"OP_GREATERTHAN", "OP_LESSTHANOREQUAL", "OP_GREATERTHANOREQUAL", "OP_MIN", "OP_MAX",
|
|
"OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
|
|
"OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
|
|
"OP_CHECKMULTISIGVERIFY",
|
|
("OP_SINGLEBYTE_END", 0xF0),
|
|
("OP_DOUBLEBYTE_BEGIN", 0xF000),
|
|
"OP_PUBKEY", "OP_PUBKEYHASH",
|
|
("OP_INVALIDOPCODE", 0xFFFF),
|
|
])
|
|
|
|
def script_GetOp(bytes):
|
|
i = 0
|
|
while i < len(bytes):
|
|
vch = None
|
|
opcode = ord(bytes[i])
|
|
i += 1
|
|
if opcode >= opcodes.OP_SINGLEBYTE_END:
|
|
opcode <<= 8
|
|
opcode |= ord(bytes[i])
|
|
i += 1
|
|
|
|
if opcode <= opcodes.OP_PUSHDATA4:
|
|
nSize = opcode
|
|
if opcode == opcodes.OP_PUSHDATA1:
|
|
nSize = ord(bytes[i])
|
|
i += 1
|
|
elif opcode == opcodes.OP_PUSHDATA2:
|
|
(nSize,) = struct.unpack_from('<H', bytes, i)
|
|
i += 2
|
|
elif opcode == opcodes.OP_PUSHDATA4:
|
|
(nSize,) = struct.unpack_from('<I', bytes, i)
|
|
i += 4
|
|
vch = bytes[i:i+nSize]
|
|
i += nSize
|
|
|
|
yield (opcode, vch, i)
|
|
|
|
def script_GetOpName(opcode):
|
|
return (opcodes.whatis(opcode)).replace("OP_", "")
|
|
|
|
def decode_script(bytes):
|
|
result = ''
|
|
for (opcode, vch, i) in script_GetOp(bytes):
|
|
if len(result) > 0: result += " "
|
|
if opcode <= opcodes.OP_PUSHDATA4:
|
|
result += "%d:"%(opcode,)
|
|
result += short_hex(vch)
|
|
else:
|
|
result += script_GetOpName(opcode)
|
|
return result
|
|
|
|
def match_decoded(decoded, to_match):
|
|
if len(decoded) != len(to_match):
|
|
return False;
|
|
for i in range(len(decoded)):
|
|
if to_match[i] == opcodes.OP_PUSHDATA4 and decoded[i][0] <= opcodes.OP_PUSHDATA4:
|
|
continue # Opcodes below OP_PUSHDATA4 all just push data onto stack, and are equivalent.
|
|
if to_match[i] != decoded[i][0]:
|
|
return False
|
|
return True
|
|
|
|
def extract_public_key(bytes):
|
|
decoded = [ x for x in script_GetOp(bytes) ]
|
|
|
|
# non-generated TxIn transactions push a signature
|
|
# (seventy-something bytes) and then their public key
|
|
# (65 bytes) onto the stack:
|
|
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
|
|
if match_decoded(decoded, match):
|
|
return public_key_to_bc_address(decoded[1][1])
|
|
|
|
# The Genesis Block, self-payments, and pay-by-IP-address payments look like:
|
|
# 65 BYTES:... CHECKSIG
|
|
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_CHECKSIG ]
|
|
if match_decoded(decoded, match):
|
|
return public_key_to_bc_address(decoded[0][1])
|
|
|
|
# Pay-by-Bitcoin-address TxOuts look like:
|
|
# DUP HASH160 20 BYTES:... EQUALVERIFY CHECKSIG
|
|
match = [ opcodes.OP_DUP, opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUALVERIFY, opcodes.OP_CHECKSIG ]
|
|
if match_decoded(decoded, match):
|
|
return hash_160_to_bc_address(decoded[2][1])
|
|
|
|
return "(None)"
|