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1107 lines
40 KiB
1107 lines
40 KiB
#!/usr/bin/env python
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#
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# Electrum - lightweight Bitcoin client
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# Copyright (C) 2011 Thomas Voegtlin
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#
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# Permission is hereby granted, free of charge, to any person
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# obtaining a copy of this software and associated documentation files
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# (the "Software"), to deal in the Software without restriction,
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# including without limitation the rights to use, copy, modify, merge,
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# publish, distribute, sublicense, and/or sell copies of the Software,
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# and to permit persons to whom the Software is furnished to do so,
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# subject to the following conditions:
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#
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# The above copyright notice and this permission notice shall be
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# included in all copies or substantial portions of the Software.
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#
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
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# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
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# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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# SOFTWARE.
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# Note: The deserialization code originally comes from ABE.
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from .util import print_error, profiler
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from . import bitcoin
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from .bitcoin import *
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import struct
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import traceback
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import sys
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#
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# Workalike python implementation of Bitcoin's CDataStream class.
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#
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from .keystore import xpubkey_to_address, xpubkey_to_pubkey
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NO_SIGNATURE = 'ff'
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class SerializationError(Exception):
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""" Thrown when there's a problem deserializing or serializing """
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class UnknownTxinType(Exception):
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pass
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class NotRecognizedRedeemScript(Exception):
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pass
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class BCDataStream(object):
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def __init__(self):
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self.input = None
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self.read_cursor = 0
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def clear(self):
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self.input = None
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self.read_cursor = 0
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def write(self, _bytes): # Initialize with string of _bytes
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if self.input is None:
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self.input = bytearray(_bytes)
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else:
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self.input += bytearray(_bytes)
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def read_string(self, encoding='ascii'):
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# Strings are encoded depending on length:
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# 0 to 252 : 1-byte-length followed by bytes (if any)
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# 253 to 65,535 : byte'253' 2-byte-length followed by bytes
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# 65,536 to 4,294,967,295 : byte '254' 4-byte-length followed by bytes
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# ... and the Bitcoin client is coded to understand:
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# greater than 4,294,967,295 : byte '255' 8-byte-length followed by bytes of string
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# ... but I don't think it actually handles any strings that big.
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if self.input is None:
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raise SerializationError("call write(bytes) before trying to deserialize")
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length = self.read_compact_size()
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return self.read_bytes(length).decode(encoding)
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def write_string(self, string, encoding='ascii'):
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string = to_bytes(string, encoding)
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# Length-encoded as with read-string
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self.write_compact_size(len(string))
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self.write(string)
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def read_bytes(self, length):
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try:
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result = self.input[self.read_cursor:self.read_cursor+length]
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self.read_cursor += length
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return result
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except IndexError:
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raise SerializationError("attempt to read past end of buffer")
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return ''
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def read_boolean(self): return self.read_bytes(1)[0] != chr(0)
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def read_int16(self): return self._read_num('<h')
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def read_uint16(self): return self._read_num('<H')
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def read_int32(self): return self._read_num('<i')
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def read_uint32(self): return self._read_num('<I')
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def read_int64(self): return self._read_num('<q')
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def read_uint64(self): return self._read_num('<Q')
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def write_boolean(self, val): return self.write(chr(1) if val else chr(0))
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def write_int16(self, val): return self._write_num('<h', val)
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def write_uint16(self, val): return self._write_num('<H', val)
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def write_int32(self, val): return self._write_num('<i', val)
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def write_uint32(self, val): return self._write_num('<I', val)
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def write_int64(self, val): return self._write_num('<q', val)
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def write_uint64(self, val): return self._write_num('<Q', val)
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def read_compact_size(self):
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try:
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size = self.input[self.read_cursor]
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self.read_cursor += 1
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if size == 253:
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size = self._read_num('<H')
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elif size == 254:
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size = self._read_num('<I')
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elif size == 255:
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size = self._read_num('<Q')
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return size
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except IndexError:
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raise SerializationError("attempt to read past end of buffer")
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def write_compact_size(self, size):
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if size < 0:
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raise SerializationError("attempt to write size < 0")
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elif size < 253:
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self.write(bytes([size]))
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elif size < 2**16:
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self.write(b'\xfd')
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self._write_num('<H', size)
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elif size < 2**32:
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self.write(b'\xfe')
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self._write_num('<I', size)
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elif size < 2**64:
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self.write(b'\xff')
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self._write_num('<Q', size)
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def _read_num(self, format):
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try:
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(i,) = struct.unpack_from(format, self.input, self.read_cursor)
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self.read_cursor += struct.calcsize(format)
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except Exception as e:
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raise SerializationError(e)
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return i
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def _write_num(self, format, num):
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s = struct.pack(format, num)
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self.write(s)
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# enum-like type
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# From the Python Cookbook, downloaded from http://code.activestate.com/recipes/67107/
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class EnumException(Exception):
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pass
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class Enumeration:
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def __init__(self, name, enumList):
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self.__doc__ = name
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lookup = { }
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reverseLookup = { }
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i = 0
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uniqueNames = [ ]
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uniqueValues = [ ]
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for x in enumList:
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if isinstance(x, tuple):
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x, i = x
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if not isinstance(x, str):
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raise EnumException("enum name is not a string: " + x)
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if not isinstance(i, int):
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raise EnumException("enum value is not an integer: " + i)
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if x in uniqueNames:
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raise EnumException("enum name is not unique: " + x)
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if i in uniqueValues:
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raise EnumException("enum value is not unique for " + x)
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uniqueNames.append(x)
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uniqueValues.append(i)
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lookup[x] = i
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reverseLookup[i] = x
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i = i + 1
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self.lookup = lookup
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self.reverseLookup = reverseLookup
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def __getattr__(self, attr):
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if attr not in self.lookup:
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raise AttributeError
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return self.lookup[attr]
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def whatis(self, value):
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return self.reverseLookup[value]
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# This function comes from bitcointools, bct-LICENSE.txt.
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def long_hex(bytes):
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return bytes.encode('hex_codec')
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# This function comes from bitcointools, bct-LICENSE.txt.
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def short_hex(bytes):
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t = bytes.encode('hex_codec')
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if len(t) < 11:
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return t
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return t[0:4]+"..."+t[-4:]
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opcodes = Enumeration("Opcodes", [
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("OP_0", 0), ("OP_PUSHDATA1",76), "OP_PUSHDATA2", "OP_PUSHDATA4", "OP_1NEGATE", "OP_RESERVED",
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"OP_1", "OP_2", "OP_3", "OP_4", "OP_5", "OP_6", "OP_7",
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"OP_8", "OP_9", "OP_10", "OP_11", "OP_12", "OP_13", "OP_14", "OP_15", "OP_16",
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"OP_NOP", "OP_VER", "OP_IF", "OP_NOTIF", "OP_VERIF", "OP_VERNOTIF", "OP_ELSE", "OP_ENDIF", "OP_VERIFY",
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"OP_RETURN", "OP_TOALTSTACK", "OP_FROMALTSTACK", "OP_2DROP", "OP_2DUP", "OP_3DUP", "OP_2OVER", "OP_2ROT", "OP_2SWAP",
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"OP_IFDUP", "OP_DEPTH", "OP_DROP", "OP_DUP", "OP_NIP", "OP_OVER", "OP_PICK", "OP_ROLL", "OP_ROT",
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"OP_SWAP", "OP_TUCK", "OP_CAT", "OP_SUBSTR", "OP_LEFT", "OP_RIGHT", "OP_SIZE", "OP_INVERT", "OP_AND",
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"OP_OR", "OP_XOR", "OP_EQUAL", "OP_EQUALVERIFY", "OP_RESERVED1", "OP_RESERVED2", "OP_1ADD", "OP_1SUB", "OP_2MUL",
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"OP_2DIV", "OP_NEGATE", "OP_ABS", "OP_NOT", "OP_0NOTEQUAL", "OP_ADD", "OP_SUB", "OP_MUL", "OP_DIV",
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"OP_MOD", "OP_LSHIFT", "OP_RSHIFT", "OP_BOOLAND", "OP_BOOLOR",
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"OP_NUMEQUAL", "OP_NUMEQUALVERIFY", "OP_NUMNOTEQUAL", "OP_LESSTHAN",
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"OP_GREATERTHAN", "OP_LESSTHANOREQUAL", "OP_GREATERTHANOREQUAL", "OP_MIN", "OP_MAX",
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"OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
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"OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
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"OP_CHECKMULTISIGVERIFY",
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("OP_NOP1", 0xB0),
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("OP_CHECKLOCKTIMEVERIFY", 0xB1), ("OP_CHECKSEQUENCEVERIFY", 0xB2),
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"OP_NOP4", "OP_NOP5", "OP_NOP6", "OP_NOP7", "OP_NOP8", "OP_NOP9", "OP_NOP10",
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("OP_INVALIDOPCODE", 0xFF),
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])
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def script_GetOp(_bytes):
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i = 0
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while i < len(_bytes):
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vch = None
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opcode = _bytes[i]
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i += 1
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if opcode <= opcodes.OP_PUSHDATA4:
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nSize = opcode
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if opcode == opcodes.OP_PUSHDATA1:
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nSize = _bytes[i]
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i += 1
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elif opcode == opcodes.OP_PUSHDATA2:
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(nSize,) = struct.unpack_from('<H', _bytes, i)
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i += 2
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elif opcode == opcodes.OP_PUSHDATA4:
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(nSize,) = struct.unpack_from('<I', _bytes, i)
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i += 4
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vch = _bytes[i:i + nSize]
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i += nSize
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yield opcode, vch, i
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def script_GetOpName(opcode):
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return (opcodes.whatis(opcode)).replace("OP_", "")
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def decode_script(bytes):
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result = ''
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for (opcode, vch, i) in script_GetOp(bytes):
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if len(result) > 0: result += " "
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if opcode <= opcodes.OP_PUSHDATA4:
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result += "%d:"%(opcode,)
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result += short_hex(vch)
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else:
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result += script_GetOpName(opcode)
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return result
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def match_decoded(decoded, to_match):
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if len(decoded) != len(to_match):
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return False;
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for i in range(len(decoded)):
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if to_match[i] == opcodes.OP_PUSHDATA4 and decoded[i][0] <= opcodes.OP_PUSHDATA4 and decoded[i][0]>0:
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continue # Opcodes below OP_PUSHDATA4 all just push data onto stack, and are equivalent.
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if to_match[i] != decoded[i][0]:
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return False
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return True
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def parse_sig(x_sig):
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return [None if x == NO_SIGNATURE else x for x in x_sig]
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def safe_parse_pubkey(x):
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try:
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return xpubkey_to_pubkey(x)
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except:
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return x
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def parse_scriptSig(d, _bytes):
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try:
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decoded = [ x for x in script_GetOp(_bytes) ]
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except Exception as e:
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# coinbase transactions raise an exception
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print_error("parse_scriptSig: cannot find address in input script (coinbase?)",
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bh2u(_bytes))
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return
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match = [ opcodes.OP_PUSHDATA4 ]
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if match_decoded(decoded, match):
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item = decoded[0][1]
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if item[0] == 0:
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# segwit embedded into p2sh
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# witness version 0
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d['address'] = bitcoin.hash160_to_p2sh(bitcoin.hash_160(item))
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if len(item) == 22:
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d['type'] = 'p2wpkh-p2sh'
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elif len(item) == 34:
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d['type'] = 'p2wsh-p2sh'
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else:
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print_error("unrecognized txin type", bh2u(item))
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elif opcodes.OP_1 <= item[0] <= opcodes.OP_16:
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# segwit embedded into p2sh
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# witness version 1-16
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pass
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else:
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# assert item[0] == 0x30
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# pay-to-pubkey
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d['type'] = 'p2pk'
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d['address'] = "(pubkey)"
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d['signatures'] = [bh2u(item)]
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d['num_sig'] = 1
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d['x_pubkeys'] = ["(pubkey)"]
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d['pubkeys'] = ["(pubkey)"]
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return
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# p2pkh TxIn transactions push a signature
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# (71-73 bytes) and then their public key
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# (33 or 65 bytes) onto the stack:
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match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
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if match_decoded(decoded, match):
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sig = bh2u(decoded[0][1])
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x_pubkey = bh2u(decoded[1][1])
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try:
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signatures = parse_sig([sig])
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pubkey, address = xpubkey_to_address(x_pubkey)
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except:
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print_error("parse_scriptSig: cannot find address in input script (p2pkh?)",
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bh2u(_bytes))
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return
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d['type'] = 'p2pkh'
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d['signatures'] = signatures
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d['x_pubkeys'] = [x_pubkey]
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d['num_sig'] = 1
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d['pubkeys'] = [pubkey]
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d['address'] = address
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return
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# p2sh transaction, m of n
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match = [ opcodes.OP_0 ] + [ opcodes.OP_PUSHDATA4 ] * (len(decoded) - 1)
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if match_decoded(decoded, match):
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x_sig = [bh2u(x[1]) for x in decoded[1:-1]]
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redeem_script = bh2u(decoded[-1][1])
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try:
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m, n, x_pubkeys, pubkeys = parse_redeemScript_multisig(bfh(redeem_script))
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except NotRecognizedRedeemScript:
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print_error("parse_scriptSig: cannot find address in input script (p2sh?)",
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bh2u(_bytes))
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# we could still guess:
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# d['address'] = hash160_to_p2sh(hash_160(decoded[-1][1]))
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return
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# write result in d
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d['type'] = 'p2sh'
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d['num_sig'] = m
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d['signatures'] = parse_sig(x_sig)
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d['x_pubkeys'] = x_pubkeys
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d['pubkeys'] = pubkeys
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d['redeem_script'] = redeem_script
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d['address'] = hash160_to_p2sh(hash_160(bfh(redeem_script)))
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return
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print_error("parse_scriptSig: cannot find address in input script (unknown)",
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bh2u(_bytes))
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def parse_redeemScript_multisig(redeem_script):
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dec2 = [ x for x in script_GetOp(redeem_script) ]
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try:
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m = dec2[0][0] - opcodes.OP_1 + 1
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n = dec2[-2][0] - opcodes.OP_1 + 1
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except IndexError:
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raise NotRecognizedRedeemScript()
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op_m = opcodes.OP_1 + m - 1
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op_n = opcodes.OP_1 + n - 1
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match_multisig = [ op_m ] + [opcodes.OP_PUSHDATA4]*n + [ op_n, opcodes.OP_CHECKMULTISIG ]
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if not match_decoded(dec2, match_multisig):
|
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raise NotRecognizedRedeemScript()
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x_pubkeys = [bh2u(x[1]) for x in dec2[1:-2]]
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pubkeys = [safe_parse_pubkey(x) for x in x_pubkeys]
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redeem_script2 = bfh(multisig_script(pubkeys, m))
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if redeem_script2 != redeem_script:
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raise NotRecognizedRedeemScript()
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return m, n, x_pubkeys, pubkeys
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|
|
|
|
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def get_address_from_output_script(_bytes, *, net=None):
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decoded = [x for x in script_GetOp(_bytes)]
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|
|
|
# The Genesis Block, self-payments, and pay-by-IP-address payments look like:
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# 65 BYTES:... CHECKSIG
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match = [ opcodes.OP_PUSHDATA4, opcodes.OP_CHECKSIG ]
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if match_decoded(decoded, match):
|
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return TYPE_PUBKEY, bh2u(decoded[0][1])
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|
|
|
# Pay-by-Bitcoin-address TxOuts look like:
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# DUP HASH160 20 BYTES:... EQUALVERIFY CHECKSIG
|
|
match = [ opcodes.OP_DUP, opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUALVERIFY, opcodes.OP_CHECKSIG ]
|
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if match_decoded(decoded, match):
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return TYPE_ADDRESS, hash160_to_p2pkh(decoded[2][1], net=net)
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|
|
|
# p2sh
|
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match = [ opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUAL ]
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if match_decoded(decoded, match):
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return TYPE_ADDRESS, hash160_to_p2sh(decoded[1][1], net=net)
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|
|
# segwit address
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possible_witness_versions = [opcodes.OP_0] + list(range(opcodes.OP_1, opcodes.OP_16 + 1))
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for witver, opcode in enumerate(possible_witness_versions):
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match = [ opcode, opcodes.OP_PUSHDATA4 ]
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if match_decoded(decoded, match):
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return TYPE_ADDRESS, hash_to_segwit_addr(decoded[1][1], witver=witver, net=net)
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|
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return TYPE_SCRIPT, bh2u(_bytes)
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|
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def parse_input(vds):
|
|
d = {}
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prevout_hash = hash_encode(vds.read_bytes(32))
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prevout_n = vds.read_uint32()
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scriptSig = vds.read_bytes(vds.read_compact_size())
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sequence = vds.read_uint32()
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d['prevout_hash'] = prevout_hash
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d['prevout_n'] = prevout_n
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d['sequence'] = sequence
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d['x_pubkeys'] = []
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d['pubkeys'] = []
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d['signatures'] = {}
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d['address'] = None
|
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d['num_sig'] = 0
|
|
if prevout_hash == '00'*32:
|
|
d['type'] = 'coinbase'
|
|
d['scriptSig'] = bh2u(scriptSig)
|
|
else:
|
|
d['type'] = 'unknown'
|
|
if scriptSig:
|
|
d['scriptSig'] = bh2u(scriptSig)
|
|
try:
|
|
parse_scriptSig(d, scriptSig)
|
|
except BaseException:
|
|
traceback.print_exc(file=sys.stderr)
|
|
print_error('failed to parse scriptSig', bh2u(scriptSig))
|
|
else:
|
|
d['scriptSig'] = ''
|
|
|
|
return d
|
|
|
|
|
|
def parse_witness(vds, txin):
|
|
n = vds.read_compact_size()
|
|
if n == 0:
|
|
return
|
|
if n == 0xffffffff:
|
|
txin['value'] = vds.read_uint64()
|
|
n = vds.read_compact_size()
|
|
# now 'n' is the number of items in the witness
|
|
w = list(bh2u(vds.read_bytes(vds.read_compact_size())) for i in range(n))
|
|
|
|
txin['witness'] = var_int(n) + ''.join(witness_push(i) for i in w)
|
|
|
|
# FIXME: witness version > 0 will probably fail here.
|
|
# For native segwit, we would need the scriptPubKey of the parent txn
|
|
# to determine witness program version, and properly parse the witness.
|
|
# In case of p2sh-segwit, we can tell based on the scriptSig in this txn.
|
|
# The code below assumes witness version 0.
|
|
# p2sh-segwit should work in that case; for native segwit we need to tell
|
|
# between p2wpkh and p2wsh; we do this based on number of witness items,
|
|
# hence (FIXME) p2wsh with n==2 (maybe n==1 ?) will probably fail.
|
|
# If v==0 and n==2, we need parent scriptPubKey to distinguish between p2wpkh and p2wsh.
|
|
try:
|
|
if txin['type'] == 'coinbase':
|
|
pass
|
|
elif txin['type'] == 'p2wsh-p2sh' or n > 2:
|
|
witness_script = w[-1]
|
|
try:
|
|
m, n, x_pubkeys, pubkeys = parse_redeemScript_multisig(bfh(witness_script))
|
|
except NotRecognizedRedeemScript:
|
|
raise UnknownTxinType()
|
|
txin['signatures'] = parse_sig(w[1:-1])
|
|
txin['num_sig'] = m
|
|
txin['x_pubkeys'] = x_pubkeys
|
|
txin['pubkeys'] = pubkeys
|
|
txin['witness_script'] = witness_script
|
|
if not txin.get('scriptSig'): # native segwit script
|
|
txin['type'] = 'p2wsh'
|
|
txin['address'] = bitcoin.script_to_p2wsh(witness_script)
|
|
elif txin['type'] == 'p2wpkh-p2sh' or n == 2:
|
|
txin['num_sig'] = 1
|
|
txin['x_pubkeys'] = [w[1]]
|
|
txin['pubkeys'] = [safe_parse_pubkey(w[1])]
|
|
txin['signatures'] = parse_sig([w[0]])
|
|
if not txin.get('scriptSig'): # native segwit script
|
|
txin['type'] = 'p2wpkh'
|
|
txin['address'] = bitcoin.public_key_to_p2wpkh(bfh(txin['pubkeys'][0]))
|
|
else:
|
|
raise UnknownTxinType()
|
|
except UnknownTxinType:
|
|
txin['type'] = 'unknown'
|
|
# FIXME: GUI might show 'unknown' address (e.g. for a non-multisig p2wsh)
|
|
except BaseException:
|
|
txin['type'] = 'unknown'
|
|
traceback.print_exc(file=sys.stderr)
|
|
print_error('failed to parse witness', txin.get('witness'))
|
|
|
|
|
|
def parse_output(vds, i):
|
|
d = {}
|
|
d['value'] = vds.read_int64()
|
|
scriptPubKey = vds.read_bytes(vds.read_compact_size())
|
|
d['type'], d['address'] = get_address_from_output_script(scriptPubKey)
|
|
d['scriptPubKey'] = bh2u(scriptPubKey)
|
|
d['prevout_n'] = i
|
|
return d
|
|
|
|
|
|
def deserialize(raw):
|
|
vds = BCDataStream()
|
|
vds.write(bfh(raw))
|
|
d = {}
|
|
start = vds.read_cursor
|
|
d['version'] = vds.read_int32()
|
|
n_vin = vds.read_compact_size()
|
|
is_segwit = (n_vin == 0)
|
|
if is_segwit:
|
|
marker = vds.read_bytes(1)
|
|
if marker != b'\x01':
|
|
raise ValueError('invalid txn marker byte: {}'.format(marker))
|
|
n_vin = vds.read_compact_size()
|
|
d['inputs'] = [parse_input(vds) for i in range(n_vin)]
|
|
n_vout = vds.read_compact_size()
|
|
d['outputs'] = [parse_output(vds, i) for i in range(n_vout)]
|
|
if is_segwit:
|
|
for i in range(n_vin):
|
|
txin = d['inputs'][i]
|
|
parse_witness(vds, txin)
|
|
d['lockTime'] = vds.read_uint32()
|
|
return d
|
|
|
|
|
|
# pay & redeem scripts
|
|
|
|
|
|
|
|
def multisig_script(public_keys, m):
|
|
n = len(public_keys)
|
|
assert n <= 15
|
|
assert m <= n
|
|
op_m = format(opcodes.OP_1 + m - 1, 'x')
|
|
op_n = format(opcodes.OP_1 + n - 1, 'x')
|
|
keylist = [op_push(len(k)//2) + k for k in public_keys]
|
|
return op_m + ''.join(keylist) + op_n + 'ae'
|
|
|
|
|
|
|
|
|
|
class Transaction:
|
|
|
|
def __str__(self):
|
|
if self.raw is None:
|
|
self.raw = self.serialize()
|
|
return self.raw
|
|
|
|
def __init__(self, raw):
|
|
if raw is None:
|
|
self.raw = None
|
|
elif isinstance(raw, str):
|
|
self.raw = raw.strip() if raw else None
|
|
elif isinstance(raw, dict):
|
|
self.raw = raw['hex']
|
|
else:
|
|
raise Exception("cannot initialize transaction", raw)
|
|
self._inputs = None
|
|
self._outputs = None
|
|
self.locktime = 0
|
|
self.version = 1
|
|
|
|
def update(self, raw):
|
|
self.raw = raw
|
|
self._inputs = None
|
|
self.deserialize()
|
|
|
|
def inputs(self):
|
|
if self._inputs is None:
|
|
self.deserialize()
|
|
return self._inputs
|
|
|
|
def outputs(self):
|
|
if self._outputs is None:
|
|
self.deserialize()
|
|
return self._outputs
|
|
|
|
@classmethod
|
|
def get_sorted_pubkeys(self, txin):
|
|
# sort pubkeys and x_pubkeys, using the order of pubkeys
|
|
if txin['type'] == 'coinbase':
|
|
return [], []
|
|
x_pubkeys = txin['x_pubkeys']
|
|
pubkeys = txin.get('pubkeys')
|
|
if pubkeys is None:
|
|
pubkeys = [xpubkey_to_pubkey(x) for x in x_pubkeys]
|
|
pubkeys, x_pubkeys = zip(*sorted(zip(pubkeys, x_pubkeys)))
|
|
txin['pubkeys'] = pubkeys = list(pubkeys)
|
|
txin['x_pubkeys'] = x_pubkeys = list(x_pubkeys)
|
|
return pubkeys, x_pubkeys
|
|
|
|
def update_signatures(self, raw):
|
|
"""Add new signatures to a transaction"""
|
|
d = deserialize(raw)
|
|
for i, txin in enumerate(self.inputs()):
|
|
pubkeys, x_pubkeys = self.get_sorted_pubkeys(txin)
|
|
sigs1 = txin.get('signatures')
|
|
sigs2 = d['inputs'][i].get('signatures')
|
|
for sig in sigs2:
|
|
if sig in sigs1:
|
|
continue
|
|
pre_hash = Hash(bfh(self.serialize_preimage(i)))
|
|
# der to string
|
|
order = ecdsa.ecdsa.generator_secp256k1.order()
|
|
r, s = ecdsa.util.sigdecode_der(bfh(sig[:-2]), order)
|
|
sig_string = ecdsa.util.sigencode_string(r, s, order)
|
|
compressed = True
|
|
for recid in range(4):
|
|
public_key = MyVerifyingKey.from_signature(sig_string, recid, pre_hash, curve = SECP256k1)
|
|
pubkey = bh2u(point_to_ser(public_key.pubkey.point, compressed))
|
|
if pubkey in pubkeys:
|
|
public_key.verify_digest(sig_string, pre_hash, sigdecode = ecdsa.util.sigdecode_string)
|
|
j = pubkeys.index(pubkey)
|
|
print_error("adding sig", i, j, pubkey, sig)
|
|
self.add_signature_to_txin(self._inputs[i], j, sig)
|
|
#self._inputs[i]['x_pubkeys'][j] = pubkey
|
|
break
|
|
# redo raw
|
|
self.raw = self.serialize()
|
|
|
|
@classmethod
|
|
def add_signature_to_txin(cls, txin, signingPos, sig):
|
|
txin['signatures'][signingPos] = sig
|
|
txin['scriptSig'] = None # force re-serialization
|
|
txin['witness'] = None # force re-serialization
|
|
|
|
def deserialize(self):
|
|
if self.raw is None:
|
|
return
|
|
#self.raw = self.serialize()
|
|
if self._inputs is not None:
|
|
return
|
|
d = deserialize(self.raw)
|
|
self._inputs = d['inputs']
|
|
self._outputs = [(x['type'], x['address'], x['value']) for x in d['outputs']]
|
|
self.locktime = d['lockTime']
|
|
self.version = d['version']
|
|
return d
|
|
|
|
@classmethod
|
|
def from_io(klass, inputs, outputs, locktime=0):
|
|
self = klass(None)
|
|
self._inputs = inputs
|
|
self._outputs = outputs
|
|
self.locktime = locktime
|
|
return self
|
|
|
|
@classmethod
|
|
def pay_script(self, output_type, addr):
|
|
if output_type == TYPE_SCRIPT:
|
|
return addr
|
|
elif output_type == TYPE_ADDRESS:
|
|
return bitcoin.address_to_script(addr)
|
|
elif output_type == TYPE_PUBKEY:
|
|
return bitcoin.public_key_to_p2pk_script(addr)
|
|
else:
|
|
raise TypeError('Unknown output type')
|
|
|
|
@classmethod
|
|
def estimate_pubkey_size_from_x_pubkey(cls, x_pubkey):
|
|
try:
|
|
if x_pubkey[0:2] in ['02', '03']: # compressed pubkey
|
|
return 0x21
|
|
elif x_pubkey[0:2] == '04': # uncompressed pubkey
|
|
return 0x41
|
|
elif x_pubkey[0:2] == 'ff': # bip32 extended pubkey
|
|
return 0x21
|
|
elif x_pubkey[0:2] == 'fe': # old electrum extended pubkey
|
|
return 0x41
|
|
except Exception as e:
|
|
pass
|
|
return 0x21 # just guess it is compressed
|
|
|
|
@classmethod
|
|
def estimate_pubkey_size_for_txin(cls, txin):
|
|
pubkeys = txin.get('pubkeys', [])
|
|
x_pubkeys = txin.get('x_pubkeys', [])
|
|
if pubkeys and len(pubkeys) > 0:
|
|
return cls.estimate_pubkey_size_from_x_pubkey(pubkeys[0])
|
|
elif x_pubkeys and len(x_pubkeys) > 0:
|
|
return cls.estimate_pubkey_size_from_x_pubkey(x_pubkeys[0])
|
|
else:
|
|
return 0x21 # just guess it is compressed
|
|
|
|
@classmethod
|
|
def get_siglist(self, txin, estimate_size=False):
|
|
# if we have enough signatures, we use the actual pubkeys
|
|
# otherwise, use extended pubkeys (with bip32 derivation)
|
|
if txin['type'] == 'coinbase':
|
|
return [], []
|
|
num_sig = txin.get('num_sig', 1)
|
|
if estimate_size:
|
|
pubkey_size = self.estimate_pubkey_size_for_txin(txin)
|
|
pk_list = ["00" * pubkey_size] * len(txin.get('x_pubkeys', [None]))
|
|
# we assume that signature will be 0x48 bytes long
|
|
sig_list = [ "00" * 0x48 ] * num_sig
|
|
else:
|
|
pubkeys, x_pubkeys = self.get_sorted_pubkeys(txin)
|
|
x_signatures = txin['signatures']
|
|
signatures = list(filter(None, x_signatures))
|
|
is_complete = len(signatures) == num_sig
|
|
if is_complete:
|
|
pk_list = pubkeys
|
|
sig_list = signatures
|
|
else:
|
|
pk_list = x_pubkeys
|
|
sig_list = [sig if sig else NO_SIGNATURE for sig in x_signatures]
|
|
return pk_list, sig_list
|
|
|
|
@classmethod
|
|
def serialize_witness(self, txin, estimate_size=False):
|
|
if not self.is_segwit_input(txin):
|
|
return '00'
|
|
if txin['type'] == 'coinbase':
|
|
return txin['witness']
|
|
|
|
witness = txin.get('witness', None)
|
|
if witness is None:
|
|
pubkeys, sig_list = self.get_siglist(txin, estimate_size)
|
|
if txin['type'] in ['p2wpkh', 'p2wpkh-p2sh']:
|
|
witness = var_int(2) + witness_push(sig_list[0]) + witness_push(pubkeys[0])
|
|
elif txin['type'] in ['p2wsh', 'p2wsh-p2sh']:
|
|
n = len(sig_list) + 2
|
|
witness_script = multisig_script(pubkeys, txin['num_sig'])
|
|
witness = var_int(n) + '00' + ''.join(witness_push(x) for x in sig_list) + witness_push(witness_script)
|
|
else:
|
|
raise Exception('wrong txin type:', txin['type'])
|
|
if self.is_txin_complete(txin) or estimate_size:
|
|
value_field = ''
|
|
else:
|
|
value_field = var_int(0xffffffff) + int_to_hex(txin['value'], 8)
|
|
return value_field + witness
|
|
|
|
@classmethod
|
|
def is_segwit_input(cls, txin):
|
|
has_nonzero_witness = txin.get('witness', '00') not in ('00', None)
|
|
return cls.is_segwit_inputtype(txin['type']) or has_nonzero_witness
|
|
|
|
@classmethod
|
|
def is_segwit_inputtype(cls, txin_type):
|
|
return txin_type in ('p2wpkh', 'p2wpkh-p2sh', 'p2wsh', 'p2wsh-p2sh')
|
|
|
|
@classmethod
|
|
def input_script(self, txin, estimate_size=False):
|
|
_type = txin['type']
|
|
if _type == 'coinbase':
|
|
return txin['scriptSig']
|
|
|
|
script_sig = txin.get('scriptSig', None)
|
|
if script_sig is not None:
|
|
return script_sig
|
|
|
|
pubkeys, sig_list = self.get_siglist(txin, estimate_size)
|
|
script = ''.join(push_script(x) for x in sig_list)
|
|
if _type == 'p2pk':
|
|
pass
|
|
elif _type == 'p2sh':
|
|
# put op_0 before script
|
|
script = '00' + script
|
|
redeem_script = multisig_script(pubkeys, txin['num_sig'])
|
|
script += push_script(redeem_script)
|
|
elif _type == 'p2pkh':
|
|
script += push_script(pubkeys[0])
|
|
elif _type in ['p2wpkh', 'p2wsh']:
|
|
return ''
|
|
elif _type == 'p2wpkh-p2sh':
|
|
pubkey = safe_parse_pubkey(pubkeys[0])
|
|
scriptSig = bitcoin.p2wpkh_nested_script(pubkey)
|
|
return push_script(scriptSig)
|
|
elif _type == 'p2wsh-p2sh':
|
|
witness_script = self.get_preimage_script(txin)
|
|
scriptSig = bitcoin.p2wsh_nested_script(witness_script)
|
|
return push_script(scriptSig)
|
|
elif _type == 'address':
|
|
script += push_script(pubkeys[0])
|
|
elif _type == 'unknown':
|
|
return txin['scriptSig']
|
|
return script
|
|
|
|
@classmethod
|
|
def is_txin_complete(cls, txin):
|
|
if txin['type'] == 'coinbase':
|
|
return True
|
|
num_sig = txin.get('num_sig', 1)
|
|
x_signatures = txin['signatures']
|
|
signatures = list(filter(None, x_signatures))
|
|
return len(signatures) == num_sig
|
|
|
|
@classmethod
|
|
def get_preimage_script(self, txin):
|
|
pubkeys, x_pubkeys = self.get_sorted_pubkeys(txin)
|
|
if txin['type'] == 'p2pkh':
|
|
return bitcoin.address_to_script(txin['address'])
|
|
elif txin['type'] in ['p2sh', 'p2wsh', 'p2wsh-p2sh']:
|
|
return multisig_script(pubkeys, txin['num_sig'])
|
|
elif txin['type'] in ['p2wpkh', 'p2wpkh-p2sh']:
|
|
pubkey = pubkeys[0]
|
|
pkh = bh2u(bitcoin.hash_160(bfh(pubkey)))
|
|
return '76a9' + push_script(pkh) + '88ac'
|
|
elif txin['type'] == 'p2pk':
|
|
pubkey = pubkeys[0]
|
|
return bitcoin.public_key_to_p2pk_script(pubkey)
|
|
else:
|
|
raise TypeError('Unknown txin type', txin['type'])
|
|
|
|
@classmethod
|
|
def serialize_outpoint(self, txin):
|
|
return bh2u(bfh(txin['prevout_hash'])[::-1]) + int_to_hex(txin['prevout_n'], 4)
|
|
|
|
@classmethod
|
|
def get_outpoint_from_txin(cls, txin):
|
|
if txin['type'] == 'coinbase':
|
|
return None
|
|
prevout_hash = txin['prevout_hash']
|
|
prevout_n = txin['prevout_n']
|
|
return prevout_hash + ':%d' % prevout_n
|
|
|
|
@classmethod
|
|
def serialize_input(self, txin, script):
|
|
# Prev hash and index
|
|
s = self.serialize_outpoint(txin)
|
|
# Script length, script, sequence
|
|
s += var_int(len(script)//2)
|
|
s += script
|
|
s += int_to_hex(txin.get('sequence', 0xffffffff - 1), 4)
|
|
return s
|
|
|
|
def set_rbf(self, rbf):
|
|
nSequence = 0xffffffff - (2 if rbf else 1)
|
|
for txin in self.inputs():
|
|
txin['sequence'] = nSequence
|
|
|
|
def BIP_LI01_sort(self):
|
|
# See https://github.com/kristovatlas/rfc/blob/master/bips/bip-li01.mediawiki
|
|
self._inputs.sort(key = lambda i: (i['prevout_hash'], i['prevout_n']))
|
|
self._outputs.sort(key = lambda o: (o[2], self.pay_script(o[0], o[1])))
|
|
|
|
def serialize_output(self, output):
|
|
output_type, addr, amount = output
|
|
s = int_to_hex(amount, 8)
|
|
script = self.pay_script(output_type, addr)
|
|
s += var_int(len(script)//2)
|
|
s += script
|
|
return s
|
|
|
|
def serialize_preimage(self, i):
|
|
nVersion = int_to_hex(self.version, 4)
|
|
nHashType = int_to_hex(1, 4)
|
|
nLocktime = int_to_hex(self.locktime, 4)
|
|
inputs = self.inputs()
|
|
outputs = self.outputs()
|
|
txin = inputs[i]
|
|
# TODO: py3 hex
|
|
if self.is_segwit_input(txin):
|
|
hashPrevouts = bh2u(Hash(bfh(''.join(self.serialize_outpoint(txin) for txin in inputs))))
|
|
hashSequence = bh2u(Hash(bfh(''.join(int_to_hex(txin.get('sequence', 0xffffffff - 1), 4) for txin in inputs))))
|
|
hashOutputs = bh2u(Hash(bfh(''.join(self.serialize_output(o) for o in outputs))))
|
|
outpoint = self.serialize_outpoint(txin)
|
|
preimage_script = self.get_preimage_script(txin)
|
|
scriptCode = var_int(len(preimage_script) // 2) + preimage_script
|
|
amount = int_to_hex(txin['value'], 8)
|
|
nSequence = int_to_hex(txin.get('sequence', 0xffffffff - 1), 4)
|
|
preimage = nVersion + hashPrevouts + hashSequence + outpoint + scriptCode + amount + nSequence + hashOutputs + nLocktime + nHashType
|
|
else:
|
|
txins = var_int(len(inputs)) + ''.join(self.serialize_input(txin, self.get_preimage_script(txin) if i==k else '') for k, txin in enumerate(inputs))
|
|
txouts = var_int(len(outputs)) + ''.join(self.serialize_output(o) for o in outputs)
|
|
preimage = nVersion + txins + txouts + nLocktime + nHashType
|
|
return preimage
|
|
|
|
def is_segwit(self):
|
|
return any(self.is_segwit_input(x) for x in self.inputs())
|
|
|
|
def serialize(self, estimate_size=False, witness=True):
|
|
nVersion = int_to_hex(self.version, 4)
|
|
nLocktime = int_to_hex(self.locktime, 4)
|
|
inputs = self.inputs()
|
|
outputs = self.outputs()
|
|
txins = var_int(len(inputs)) + ''.join(self.serialize_input(txin, self.input_script(txin, estimate_size)) for txin in inputs)
|
|
txouts = var_int(len(outputs)) + ''.join(self.serialize_output(o) for o in outputs)
|
|
if witness and self.is_segwit():
|
|
marker = '00'
|
|
flag = '01'
|
|
witness = ''.join(self.serialize_witness(x, estimate_size) for x in inputs)
|
|
return nVersion + marker + flag + txins + txouts + witness + nLocktime
|
|
else:
|
|
return nVersion + txins + txouts + nLocktime
|
|
|
|
def hash(self):
|
|
print("warning: deprecated tx.hash()")
|
|
return self.txid()
|
|
|
|
def txid(self):
|
|
all_segwit = all(self.is_segwit_input(x) for x in self.inputs())
|
|
if not all_segwit and not self.is_complete():
|
|
return None
|
|
ser = self.serialize(witness=False)
|
|
return bh2u(Hash(bfh(ser))[::-1])
|
|
|
|
def wtxid(self):
|
|
ser = self.serialize(witness=True)
|
|
return bh2u(Hash(bfh(ser))[::-1])
|
|
|
|
def add_inputs(self, inputs):
|
|
self._inputs.extend(inputs)
|
|
self.raw = None
|
|
|
|
def add_outputs(self, outputs):
|
|
self._outputs.extend(outputs)
|
|
self.raw = None
|
|
|
|
def input_value(self):
|
|
return sum(x['value'] for x in self.inputs())
|
|
|
|
def output_value(self):
|
|
return sum(val for tp, addr, val in self.outputs())
|
|
|
|
def get_fee(self):
|
|
return self.input_value() - self.output_value()
|
|
|
|
def is_final(self):
|
|
return not any([x.get('sequence', 0xffffffff - 1) < 0xffffffff - 1 for x in self.inputs()])
|
|
|
|
@profiler
|
|
def estimated_size(self):
|
|
"""Return an estimated virtual tx size in vbytes.
|
|
BIP-0141 defines 'Virtual transaction size' to be weight/4 rounded up.
|
|
This definition is only for humans, and has little meaning otherwise.
|
|
If we wanted sub-byte precision, fee calculation should use transaction
|
|
weights, but for simplicity we approximate that with (virtual_size)x4
|
|
"""
|
|
weight = self.estimated_weight()
|
|
return self.virtual_size_from_weight(weight)
|
|
|
|
@classmethod
|
|
def estimated_input_weight(cls, txin, is_segwit_tx):
|
|
'''Return an estimate of serialized input weight in weight units.'''
|
|
script = cls.input_script(txin, True)
|
|
input_size = len(cls.serialize_input(txin, script)) // 2
|
|
|
|
if cls.is_segwit_input(txin):
|
|
assert is_segwit_tx
|
|
witness_size = len(cls.serialize_witness(txin, True)) // 2
|
|
else:
|
|
witness_size = 1 if is_segwit_tx else 0
|
|
|
|
return 4 * input_size + witness_size
|
|
|
|
@classmethod
|
|
def estimated_output_size(cls, address):
|
|
"""Return an estimate of serialized output size in bytes."""
|
|
script = bitcoin.address_to_script(address)
|
|
# 8 byte value + 1 byte script len + script
|
|
return 9 + len(script) // 2
|
|
|
|
@classmethod
|
|
def virtual_size_from_weight(cls, weight):
|
|
return weight // 4 + (weight % 4 > 0)
|
|
|
|
def estimated_total_size(self):
|
|
"""Return an estimated total transaction size in bytes."""
|
|
return len(self.serialize(True)) // 2 if not self.is_complete() or self.raw is None else len(self.raw) // 2 # ASCII hex string
|
|
|
|
def estimated_witness_size(self):
|
|
"""Return an estimate of witness size in bytes."""
|
|
if not self.is_segwit():
|
|
return 0
|
|
inputs = self.inputs()
|
|
estimate = not self.is_complete()
|
|
witness = ''.join(self.serialize_witness(x, estimate) for x in inputs)
|
|
witness_size = len(witness) // 2 + 2 # include marker and flag
|
|
return witness_size
|
|
|
|
def estimated_base_size(self):
|
|
"""Return an estimated base transaction size in bytes."""
|
|
return self.estimated_total_size() - self.estimated_witness_size()
|
|
|
|
def estimated_weight(self):
|
|
"""Return an estimate of transaction weight."""
|
|
total_tx_size = self.estimated_total_size()
|
|
base_tx_size = self.estimated_base_size()
|
|
return 3 * base_tx_size + total_tx_size
|
|
|
|
def signature_count(self):
|
|
r = 0
|
|
s = 0
|
|
for txin in self.inputs():
|
|
if txin['type'] == 'coinbase':
|
|
continue
|
|
signatures = list(filter(None, txin.get('signatures',[])))
|
|
s += len(signatures)
|
|
r += txin.get('num_sig',-1)
|
|
return s, r
|
|
|
|
def is_complete(self):
|
|
s, r = self.signature_count()
|
|
return r == s
|
|
|
|
def sign(self, keypairs):
|
|
for i, txin in enumerate(self.inputs()):
|
|
num = txin['num_sig']
|
|
pubkeys, x_pubkeys = self.get_sorted_pubkeys(txin)
|
|
for j, x_pubkey in enumerate(x_pubkeys):
|
|
signatures = list(filter(None, txin['signatures']))
|
|
if len(signatures) == num:
|
|
# txin is complete
|
|
break
|
|
if x_pubkey in keypairs.keys():
|
|
print_error("adding signature for", x_pubkey)
|
|
sec, compressed = keypairs.get(x_pubkey)
|
|
pubkey = public_key_from_private_key(sec, compressed)
|
|
# add signature
|
|
pre_hash = Hash(bfh(self.serialize_preimage(i)))
|
|
pkey = regenerate_key(sec)
|
|
secexp = pkey.secret
|
|
private_key = bitcoin.MySigningKey.from_secret_exponent(secexp, curve = SECP256k1)
|
|
public_key = private_key.get_verifying_key()
|
|
sig = private_key.sign_digest_deterministic(pre_hash, hashfunc=hashlib.sha256, sigencode = ecdsa.util.sigencode_der)
|
|
if not public_key.verify_digest(sig, pre_hash, sigdecode = ecdsa.util.sigdecode_der):
|
|
raise Exception('Sanity check verifying our own signature failed.')
|
|
sig = bh2u(sig) + '01'
|
|
self.add_signature_to_txin(txin, j, sig)
|
|
#txin['x_pubkeys'][j] = pubkey
|
|
txin['pubkeys'][j] = pubkey # needed for fd keys
|
|
self._inputs[i] = txin
|
|
print_error("is_complete", self.is_complete())
|
|
self.raw = self.serialize()
|
|
|
|
def get_outputs(self):
|
|
"""convert pubkeys to addresses"""
|
|
o = []
|
|
for type, x, v in self.outputs():
|
|
if type == TYPE_ADDRESS:
|
|
addr = x
|
|
elif type == TYPE_PUBKEY:
|
|
addr = bitcoin.public_key_to_p2pkh(bfh(x))
|
|
else:
|
|
addr = 'SCRIPT ' + x
|
|
o.append((addr,v)) # consider using yield (addr, v)
|
|
return o
|
|
|
|
def get_output_addresses(self):
|
|
return [addr for addr, val in self.get_outputs()]
|
|
|
|
|
|
def has_address(self, addr):
|
|
return (addr in self.get_output_addresses()) or (addr in (tx.get("address") for tx in self.inputs()))
|
|
|
|
def as_dict(self):
|
|
if self.raw is None:
|
|
self.raw = self.serialize()
|
|
self.deserialize()
|
|
out = {
|
|
'hex': self.raw,
|
|
'complete': self.is_complete(),
|
|
'final': self.is_final(),
|
|
}
|
|
return out
|
|
|
|
|
|
def tx_from_str(txt):
|
|
"json or raw hexadecimal"
|
|
import json
|
|
txt = txt.strip()
|
|
if not txt:
|
|
raise ValueError("empty string")
|
|
try:
|
|
bfh(txt)
|
|
is_hex = True
|
|
except:
|
|
is_hex = False
|
|
if is_hex:
|
|
return txt
|
|
tx_dict = json.loads(str(txt))
|
|
assert "hex" in tx_dict.keys()
|
|
return tx_dict["hex"]
|
|
|