704 lines
21 KiB
Python
704 lines
21 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) 2015-2019 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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"""Functionality to build scripts, as well as SignatureHash().
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This file is modified from python-bitcoinlib.
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"""
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from .messages import CTransaction, CTxOut, sha256, hash256, uint256_from_str, ser_uint256, ser_string
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import hashlib
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import struct
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from .bignum import bn2vch
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MAX_SCRIPT_ELEMENT_SIZE = 20000
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OPCODE_NAMES = {}
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def hash160(s):
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return hashlib.new('ripemd160', sha256(s)).digest()
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_opcode_instances = []
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class CScriptOp(int):
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"""A single script opcode"""
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__slots__ = ()
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@staticmethod
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def encode_op_pushdata(d):
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"""Encode a PUSHDATA op, returning bytes"""
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if len(d) < 0x4c:
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return b'' + bytes([len(d)]) + d # OP_PUSHDATA
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elif len(d) <= 0xff:
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return b'\x4c' + bytes([len(d)]) + d # OP_PUSHDATA1
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elif len(d) <= 0xffff:
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return b'\x4d' + struct.pack(b'<H', len(d)) + d # OP_PUSHDATA2
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elif len(d) <= 0xffffffff:
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return b'\x4e' + struct.pack(b'<I', len(d)) + d # OP_PUSHDATA4
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else:
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raise ValueError("Data too long to encode in a PUSHDATA op")
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@staticmethod
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def encode_op_n(n):
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"""Encode a small integer op, returning an opcode"""
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if not (0 <= n <= 16):
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raise ValueError('Integer must be in range 0 <= n <= 16, got %d' % n)
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if n == 0:
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return OP_0
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else:
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return CScriptOp(OP_1 + n-1)
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def decode_op_n(self):
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"""Decode a small integer opcode, returning an integer"""
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if self == OP_0:
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return 0
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if not (self == OP_0 or OP_1 <= self <= OP_16):
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raise ValueError('op %r is not an OP_N' % self)
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return int(self - OP_1+1)
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def is_small_int(self):
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"""Return true if the op pushes a small integer to the stack"""
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if 0x51 <= self <= 0x60 or self == 0:
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return True
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else:
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return False
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def __str__(self):
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return repr(self)
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def __repr__(self):
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if self in OPCODE_NAMES:
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return OPCODE_NAMES[self]
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else:
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return 'CScriptOp(0x%x)' % self
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def __new__(cls, n):
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try:
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return _opcode_instances[n]
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except IndexError:
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assert len(_opcode_instances) == n
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_opcode_instances.append(super(CScriptOp, cls).__new__(cls, n))
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return _opcode_instances[n]
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# Populate opcode instance table
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for n in range(0xff+1):
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CScriptOp(n)
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# push value
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OP_0 = CScriptOp(0x00)
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OP_FALSE = OP_0
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OP_PUSHDATA1 = CScriptOp(0x4c)
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OP_PUSHDATA2 = CScriptOp(0x4d)
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OP_PUSHDATA4 = CScriptOp(0x4e)
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OP_1NEGATE = CScriptOp(0x4f)
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OP_RESERVED = CScriptOp(0x50)
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OP_1 = CScriptOp(0x51)
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OP_TRUE=OP_1
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OP_2 = CScriptOp(0x52)
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OP_3 = CScriptOp(0x53)
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OP_4 = CScriptOp(0x54)
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OP_5 = CScriptOp(0x55)
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OP_6 = CScriptOp(0x56)
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OP_7 = CScriptOp(0x57)
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OP_8 = CScriptOp(0x58)
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OP_9 = CScriptOp(0x59)
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OP_10 = CScriptOp(0x5a)
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OP_11 = CScriptOp(0x5b)
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OP_12 = CScriptOp(0x5c)
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OP_13 = CScriptOp(0x5d)
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OP_14 = CScriptOp(0x5e)
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OP_15 = CScriptOp(0x5f)
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OP_16 = CScriptOp(0x60)
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# control
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OP_NOP = CScriptOp(0x61)
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OP_VER = CScriptOp(0x62)
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OP_IF = CScriptOp(0x63)
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OP_NOTIF = CScriptOp(0x64)
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OP_VERIF = CScriptOp(0x65)
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OP_VERNOTIF = CScriptOp(0x66)
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OP_ELSE = CScriptOp(0x67)
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OP_ENDIF = CScriptOp(0x68)
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OP_VERIFY = CScriptOp(0x69)
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OP_RETURN = CScriptOp(0x6a)
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# stack ops
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OP_TOALTSTACK = CScriptOp(0x6b)
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OP_FROMALTSTACK = CScriptOp(0x6c)
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OP_2DROP = CScriptOp(0x6d)
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OP_2DUP = CScriptOp(0x6e)
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OP_3DUP = CScriptOp(0x6f)
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OP_2OVER = CScriptOp(0x70)
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OP_2ROT = CScriptOp(0x71)
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OP_2SWAP = CScriptOp(0x72)
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OP_IFDUP = CScriptOp(0x73)
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OP_DEPTH = CScriptOp(0x74)
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OP_DROP = CScriptOp(0x75)
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OP_DUP = CScriptOp(0x76)
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OP_NIP = CScriptOp(0x77)
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OP_OVER = CScriptOp(0x78)
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OP_PICK = CScriptOp(0x79)
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OP_ROLL = CScriptOp(0x7a)
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OP_ROT = CScriptOp(0x7b)
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OP_SWAP = CScriptOp(0x7c)
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OP_TUCK = CScriptOp(0x7d)
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# splice ops
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OP_CAT = CScriptOp(0x7e)
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OP_SUBSTR = CScriptOp(0x7f)
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OP_LEFT = CScriptOp(0x80)
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OP_RIGHT = CScriptOp(0x81)
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OP_SIZE = CScriptOp(0x82)
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# bit logic
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OP_INVERT = CScriptOp(0x83)
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OP_AND = CScriptOp(0x84)
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OP_OR = CScriptOp(0x85)
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OP_XOR = CScriptOp(0x86)
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OP_EQUAL = CScriptOp(0x87)
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OP_EQUALVERIFY = CScriptOp(0x88)
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OP_RESERVED1 = CScriptOp(0x89)
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OP_RESERVED2 = CScriptOp(0x8a)
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# numeric
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OP_1ADD = CScriptOp(0x8b)
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OP_1SUB = CScriptOp(0x8c)
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OP_2MUL = CScriptOp(0x8d)
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OP_2DIV = CScriptOp(0x8e)
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OP_NEGATE = CScriptOp(0x8f)
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OP_ABS = CScriptOp(0x90)
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OP_NOT = CScriptOp(0x91)
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OP_0NOTEQUAL = CScriptOp(0x92)
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OP_ADD = CScriptOp(0x93)
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OP_SUB = CScriptOp(0x94)
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OP_MUL = CScriptOp(0x95)
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OP_DIV = CScriptOp(0x96)
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OP_MOD = CScriptOp(0x97)
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OP_LSHIFT = CScriptOp(0x98)
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OP_RSHIFT = CScriptOp(0x99)
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OP_BOOLAND = CScriptOp(0x9a)
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OP_BOOLOR = CScriptOp(0x9b)
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OP_NUMEQUAL = CScriptOp(0x9c)
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OP_NUMEQUALVERIFY = CScriptOp(0x9d)
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OP_NUMNOTEQUAL = CScriptOp(0x9e)
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OP_LESSTHAN = CScriptOp(0x9f)
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OP_GREATERTHAN = CScriptOp(0xa0)
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OP_LESSTHANOREQUAL = CScriptOp(0xa1)
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OP_GREATERTHANOREQUAL = CScriptOp(0xa2)
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OP_MIN = CScriptOp(0xa3)
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OP_MAX = CScriptOp(0xa4)
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OP_WITHIN = CScriptOp(0xa5)
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# crypto
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OP_RIPEMD160 = CScriptOp(0xa6)
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OP_SHA1 = CScriptOp(0xa7)
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OP_SHA256 = CScriptOp(0xa8)
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OP_HASH160 = CScriptOp(0xa9)
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OP_HASH256 = CScriptOp(0xaa)
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OP_CODESEPARATOR = CScriptOp(0xab)
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OP_CHECKSIG = CScriptOp(0xac)
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OP_CHECKSIGVERIFY = CScriptOp(0xad)
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OP_CHECKMULTISIG = CScriptOp(0xae)
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OP_CHECKMULTISIGVERIFY = CScriptOp(0xaf)
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# expansion
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OP_NOP1 = CScriptOp(0xb0)
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OP_CHECKLOCKTIMEVERIFY = CScriptOp(0xb1)
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OP_CHECKSEQUENCEVERIFY = CScriptOp(0xb2)
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OP_NOP4 = CScriptOp(0xb3)
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OP_NOP5 = CScriptOp(0xb4)
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OP_NOP6 = CScriptOp(0xb5)
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OP_NOP7 = CScriptOp(0xb6)
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OP_NOP8 = CScriptOp(0xb7)
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OP_NOP9 = CScriptOp(0xb8)
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OP_NOP10 = CScriptOp(0xb9)
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# template matching params
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OP_SMALLINTEGER = CScriptOp(0xfa)
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OP_PUBKEYS = CScriptOp(0xfb)
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OP_PUBKEYHASH = CScriptOp(0xfd)
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OP_PUBKEY = CScriptOp(0xfe)
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OP_INVALIDOPCODE = CScriptOp(0xff)
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OPCODE_NAMES.update({
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OP_0 : 'OP_0',
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OP_PUSHDATA1 : 'OP_PUSHDATA1',
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OP_PUSHDATA2 : 'OP_PUSHDATA2',
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OP_PUSHDATA4 : 'OP_PUSHDATA4',
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OP_1NEGATE : 'OP_1NEGATE',
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OP_RESERVED : 'OP_RESERVED',
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OP_1 : 'OP_1',
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OP_2 : 'OP_2',
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OP_3 : 'OP_3',
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OP_4 : 'OP_4',
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OP_5 : 'OP_5',
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OP_6 : 'OP_6',
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OP_7 : 'OP_7',
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OP_8 : 'OP_8',
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OP_9 : 'OP_9',
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OP_10 : 'OP_10',
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OP_11 : 'OP_11',
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OP_12 : 'OP_12',
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OP_13 : 'OP_13',
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OP_14 : 'OP_14',
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OP_15 : 'OP_15',
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OP_16 : 'OP_16',
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OP_NOP : 'OP_NOP',
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OP_VER : 'OP_VER',
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OP_IF : 'OP_IF',
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OP_NOTIF : 'OP_NOTIF',
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OP_VERIF : 'OP_VERIF',
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OP_VERNOTIF : 'OP_VERNOTIF',
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OP_ELSE : 'OP_ELSE',
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OP_ENDIF : 'OP_ENDIF',
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OP_VERIFY : 'OP_VERIFY',
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OP_RETURN : 'OP_RETURN',
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OP_TOALTSTACK : 'OP_TOALTSTACK',
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OP_FROMALTSTACK : 'OP_FROMALTSTACK',
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OP_2DROP : 'OP_2DROP',
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OP_2DUP : 'OP_2DUP',
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OP_3DUP : 'OP_3DUP',
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OP_2OVER : 'OP_2OVER',
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OP_2ROT : 'OP_2ROT',
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OP_2SWAP : 'OP_2SWAP',
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OP_IFDUP : 'OP_IFDUP',
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OP_DEPTH : 'OP_DEPTH',
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OP_DROP : 'OP_DROP',
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OP_DUP : 'OP_DUP',
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OP_NIP : 'OP_NIP',
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OP_OVER : 'OP_OVER',
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OP_PICK : 'OP_PICK',
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OP_ROLL : 'OP_ROLL',
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OP_ROT : 'OP_ROT',
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OP_SWAP : 'OP_SWAP',
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OP_TUCK : 'OP_TUCK',
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OP_CAT : 'OP_CAT',
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OP_SUBSTR : 'OP_SUBSTR',
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OP_LEFT : 'OP_LEFT',
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OP_RIGHT : 'OP_RIGHT',
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OP_SIZE : 'OP_SIZE',
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OP_INVERT : 'OP_INVERT',
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OP_AND : 'OP_AND',
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OP_OR : 'OP_OR',
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OP_XOR : 'OP_XOR',
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OP_EQUAL : 'OP_EQUAL',
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OP_EQUALVERIFY : 'OP_EQUALVERIFY',
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OP_RESERVED1 : 'OP_RESERVED1',
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OP_RESERVED2 : 'OP_RESERVED2',
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OP_1ADD : 'OP_1ADD',
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OP_1SUB : 'OP_1SUB',
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OP_2MUL : 'OP_2MUL',
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OP_2DIV : 'OP_2DIV',
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OP_NEGATE : 'OP_NEGATE',
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OP_ABS : 'OP_ABS',
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OP_NOT : 'OP_NOT',
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OP_0NOTEQUAL : 'OP_0NOTEQUAL',
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OP_ADD : 'OP_ADD',
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OP_SUB : 'OP_SUB',
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OP_MUL : 'OP_MUL',
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OP_DIV : 'OP_DIV',
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OP_MOD : 'OP_MOD',
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OP_LSHIFT : 'OP_LSHIFT',
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OP_RSHIFT : 'OP_RSHIFT',
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OP_BOOLAND : 'OP_BOOLAND',
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OP_BOOLOR : 'OP_BOOLOR',
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OP_NUMEQUAL : 'OP_NUMEQUAL',
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OP_NUMEQUALVERIFY : 'OP_NUMEQUALVERIFY',
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OP_NUMNOTEQUAL : 'OP_NUMNOTEQUAL',
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OP_LESSTHAN : 'OP_LESSTHAN',
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OP_GREATERTHAN : 'OP_GREATERTHAN',
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OP_LESSTHANOREQUAL : 'OP_LESSTHANOREQUAL',
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OP_GREATERTHANOREQUAL : 'OP_GREATERTHANOREQUAL',
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OP_MIN : 'OP_MIN',
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OP_MAX : 'OP_MAX',
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OP_WITHIN : 'OP_WITHIN',
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OP_RIPEMD160 : 'OP_RIPEMD160',
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OP_SHA1 : 'OP_SHA1',
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OP_SHA256 : 'OP_SHA256',
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OP_HASH160 : 'OP_HASH160',
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OP_HASH256 : 'OP_HASH256',
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OP_CODESEPARATOR : 'OP_CODESEPARATOR',
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OP_CHECKSIG : 'OP_CHECKSIG',
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OP_CHECKSIGVERIFY : 'OP_CHECKSIGVERIFY',
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OP_CHECKMULTISIG : 'OP_CHECKMULTISIG',
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OP_CHECKMULTISIGVERIFY : 'OP_CHECKMULTISIGVERIFY',
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OP_NOP1 : 'OP_NOP1',
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OP_CHECKLOCKTIMEVERIFY : 'OP_CHECKLOCKTIMEVERIFY',
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OP_CHECKSEQUENCEVERIFY : 'OP_CHECKSEQUENCEVERIFY',
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OP_NOP4 : 'OP_NOP4',
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OP_NOP5 : 'OP_NOP5',
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OP_NOP6 : 'OP_NOP6',
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OP_NOP7 : 'OP_NOP7',
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OP_NOP8 : 'OP_NOP8',
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OP_NOP9 : 'OP_NOP9',
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OP_NOP10 : 'OP_NOP10',
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OP_SMALLINTEGER : 'OP_SMALLINTEGER',
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OP_PUBKEYS : 'OP_PUBKEYS',
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OP_PUBKEYHASH : 'OP_PUBKEYHASH',
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OP_PUBKEY : 'OP_PUBKEY',
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OP_INVALIDOPCODE : 'OP_INVALIDOPCODE',
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})
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class CScriptInvalidError(Exception):
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"""Base class for CScript exceptions"""
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pass
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class CScriptTruncatedPushDataError(CScriptInvalidError):
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"""Invalid pushdata due to truncation"""
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def __init__(self, msg, data):
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self.data = data
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super(CScriptTruncatedPushDataError, self).__init__(msg)
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# This is used, eg, for blockchain heights in coinbase scripts (bip34)
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class CScriptNum:
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__slots__ = ("value",)
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def __init__(self, d=0):
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self.value = d
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@staticmethod
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def encode(obj):
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r = bytearray(0)
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if obj.value == 0:
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return bytes(r)
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neg = obj.value < 0
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absvalue = -obj.value if neg else obj.value
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while (absvalue):
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r.append(absvalue & 0xff)
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absvalue >>= 8
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if r[-1] & 0x80:
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r.append(0x80 if neg else 0)
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elif neg:
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r[-1] |= 0x80
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return bytes([len(r)]) + r
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@staticmethod
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def decode(vch):
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result = 0
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# We assume valid push_size and minimal encoding
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value = vch[1:]
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if len(value) == 0:
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return result
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for i, byte in enumerate(value):
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result |= int(byte) << 8*i
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if value[-1] >= 0x80:
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# Mask for all but the highest result bit
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num_mask = (2**(len(value)*8) - 1) >> 1
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result &= num_mask
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result *= -1
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return result
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class CScript(bytes):
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"""Serialized script
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A bytes subclass, so you can use this directly whenever bytes are accepted.
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Note that this means that indexing does *not* work - you'll get an index by
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byte rather than opcode. This format was chosen for efficiency so that the
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general case would not require creating a lot of little CScriptOP objects.
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iter(script) however does iterate by opcode.
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"""
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__slots__ = ()
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@classmethod
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def __coerce_instance(cls, other):
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# Coerce other into bytes
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if isinstance(other, CScriptOp):
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other = bytes([other])
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elif isinstance(other, CScriptNum):
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if (other.value == 0):
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other = bytes([CScriptOp(OP_0)])
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else:
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other = CScriptNum.encode(other)
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elif isinstance(other, int):
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if 0 <= other <= 16:
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other = bytes([CScriptOp.encode_op_n(other)])
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elif other == -1:
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other = bytes([OP_1NEGATE])
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else:
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other = CScriptOp.encode_op_pushdata(bn2vch(other))
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elif isinstance(other, (bytes, bytearray)):
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other = CScriptOp.encode_op_pushdata(other)
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return other
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def __add__(self, other):
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# Do the coercion outside of the try block so that errors in it are
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# noticed.
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other = self.__coerce_instance(other)
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try:
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# bytes.__add__ always returns bytes instances unfortunately
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return CScript(super(CScript, self).__add__(other))
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except TypeError:
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raise TypeError('Can not add a %r instance to a CScript' % other.__class__)
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def join(self, iterable):
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# join makes no sense for a CScript()
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raise NotImplementedError
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def __new__(cls, value=b''):
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if isinstance(value, bytes) or isinstance(value, bytearray):
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return super(CScript, cls).__new__(cls, value)
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else:
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def coerce_iterable(iterable):
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for instance in iterable:
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yield cls.__coerce_instance(instance)
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# Annoyingly on both python2 and python3 bytes.join() always
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# returns a bytes instance even when subclassed.
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return super(CScript, cls).__new__(cls, b''.join(coerce_iterable(value)))
|
|
|
|
def raw_iter(self):
|
|
"""Raw iteration
|
|
|
|
Yields tuples of (opcode, data, sop_idx) so that the different possible
|
|
PUSHDATA encodings can be accurately distinguished, as well as
|
|
determining the exact opcode byte indexes. (sop_idx)
|
|
"""
|
|
i = 0
|
|
while i < len(self):
|
|
sop_idx = i
|
|
opcode = self[i]
|
|
i += 1
|
|
|
|
if opcode > OP_PUSHDATA4:
|
|
yield (opcode, None, sop_idx)
|
|
else:
|
|
datasize = None
|
|
pushdata_type = None
|
|
if opcode < OP_PUSHDATA1:
|
|
pushdata_type = 'PUSHDATA(%d)' % opcode
|
|
datasize = opcode
|
|
|
|
elif opcode == OP_PUSHDATA1:
|
|
pushdata_type = 'PUSHDATA1'
|
|
if i >= len(self):
|
|
raise CScriptInvalidError('PUSHDATA1: missing data length')
|
|
datasize = self[i]
|
|
i += 1
|
|
|
|
elif opcode == OP_PUSHDATA2:
|
|
pushdata_type = 'PUSHDATA2'
|
|
if i + 1 >= len(self):
|
|
raise CScriptInvalidError('PUSHDATA2: missing data length')
|
|
datasize = self[i] + (self[i+1] << 8)
|
|
i += 2
|
|
|
|
elif opcode == OP_PUSHDATA4:
|
|
pushdata_type = 'PUSHDATA4'
|
|
if i + 3 >= len(self):
|
|
raise CScriptInvalidError('PUSHDATA4: missing data length')
|
|
datasize = self[i] + (self[i+1] << 8) + (self[i+2] << 16) + (self[i+3] << 24)
|
|
i += 4
|
|
|
|
else:
|
|
assert False # shouldn't happen
|
|
|
|
|
|
data = bytes(self[i:i+datasize])
|
|
|
|
# Check for truncation
|
|
if len(data) < datasize:
|
|
raise CScriptTruncatedPushDataError('%s: truncated data' % pushdata_type, data)
|
|
|
|
i += datasize
|
|
|
|
yield (opcode, data, sop_idx)
|
|
|
|
def __iter__(self):
|
|
"""'Cooked' iteration
|
|
|
|
Returns either a CScriptOP instance, an integer, or bytes, as
|
|
appropriate.
|
|
|
|
See raw_iter() if you need to distinguish the different possible
|
|
PUSHDATA encodings.
|
|
"""
|
|
for (opcode, data, sop_idx) in self.raw_iter():
|
|
if data is not None:
|
|
yield data
|
|
else:
|
|
opcode = CScriptOp(opcode)
|
|
|
|
if opcode.is_small_int():
|
|
yield opcode.decode_op_n()
|
|
else:
|
|
yield CScriptOp(opcode)
|
|
|
|
def __repr__(self):
|
|
def _repr(o):
|
|
if isinstance(o, bytes):
|
|
return "x('%s')" % o.hex()
|
|
else:
|
|
return repr(o)
|
|
|
|
ops = []
|
|
i = iter(self)
|
|
while True:
|
|
op = None
|
|
try:
|
|
op = _repr(next(i))
|
|
except CScriptTruncatedPushDataError as err:
|
|
op = '%s...<ERROR: %s>' % (_repr(err.data), err)
|
|
break
|
|
except CScriptInvalidError as err:
|
|
op = '<ERROR: %s>' % err
|
|
break
|
|
except StopIteration:
|
|
break
|
|
finally:
|
|
if op is not None:
|
|
ops.append(op)
|
|
|
|
return "CScript([%s])" % ', '.join(ops)
|
|
|
|
def GetSigOpCount(self, fAccurate):
|
|
"""Get the SigOp count.
|
|
|
|
fAccurate - Accurately count CHECKMULTISIG, see BIP16 for details.
|
|
|
|
Note that this is consensus-critical.
|
|
"""
|
|
n = 0
|
|
lastOpcode = OP_INVALIDOPCODE
|
|
for (opcode, data, sop_idx) in self.raw_iter():
|
|
if opcode in (OP_CHECKSIG, OP_CHECKSIGVERIFY):
|
|
n += 1
|
|
elif opcode in (OP_CHECKMULTISIG, OP_CHECKMULTISIGVERIFY):
|
|
if fAccurate and (OP_1 <= lastOpcode <= OP_16):
|
|
n += opcode.decode_op_n()
|
|
else:
|
|
n += 20
|
|
lastOpcode = opcode
|
|
return n
|
|
|
|
|
|
SIGHASH_ALL = 1
|
|
SIGHASH_NONE = 2
|
|
SIGHASH_SINGLE = 3
|
|
SIGHASH_ANYONECANPAY = 0x80
|
|
|
|
def FindAndDelete(script, sig):
|
|
"""Consensus critical, see FindAndDelete() in Satoshi codebase"""
|
|
r = b''
|
|
last_sop_idx = sop_idx = 0
|
|
skip = True
|
|
for (opcode, data, sop_idx) in script.raw_iter():
|
|
if not skip:
|
|
r += script[last_sop_idx:sop_idx]
|
|
last_sop_idx = sop_idx
|
|
if script[sop_idx:sop_idx + len(sig)] == sig:
|
|
skip = True
|
|
else:
|
|
skip = False
|
|
if not skip:
|
|
r += script[last_sop_idx:]
|
|
return CScript(r)
|
|
|
|
|
|
def SignatureHash(script, txTo, inIdx, hashtype):
|
|
"""Consensus-correct SignatureHash
|
|
|
|
Returns (hash, err) to precisely match the consensus-critical behavior of
|
|
the SIGHASH_SINGLE bug. (inIdx is *not* checked for validity)
|
|
"""
|
|
HASH_ONE = b'\x01\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'
|
|
|
|
if inIdx >= len(txTo.vin):
|
|
return (HASH_ONE, "inIdx %d out of range (%d)" % (inIdx, len(txTo.vin)))
|
|
txtmp = CTransaction(txTo)
|
|
|
|
for txin in txtmp.vin:
|
|
txin.scriptSig = b''
|
|
txtmp.vin[inIdx].scriptSig = FindAndDelete(script, CScript([OP_CODESEPARATOR]))
|
|
|
|
if (hashtype & 0x1f) == SIGHASH_NONE:
|
|
txtmp.vout = []
|
|
|
|
for i in range(len(txtmp.vin)):
|
|
if i != inIdx:
|
|
txtmp.vin[i].nSequence = 0
|
|
|
|
elif (hashtype & 0x1f) == SIGHASH_SINGLE:
|
|
outIdx = inIdx
|
|
if outIdx >= len(txtmp.vout):
|
|
return (HASH_ONE, "outIdx %d out of range (%d)" % (outIdx, len(txtmp.vout)))
|
|
|
|
tmp = txtmp.vout[outIdx]
|
|
txtmp.vout = []
|
|
for i in range(outIdx):
|
|
txtmp.vout.append(CTxOut(-1))
|
|
txtmp.vout.append(tmp)
|
|
|
|
for i in range(len(txtmp.vin)):
|
|
if i != inIdx:
|
|
txtmp.vin[i].nSequence = 0
|
|
|
|
if hashtype & SIGHASH_ANYONECANPAY:
|
|
tmp = txtmp.vin[inIdx]
|
|
txtmp.vin = []
|
|
txtmp.vin.append(tmp)
|
|
|
|
s = txtmp.serialize_without_witness()
|
|
s += struct.pack(b"<I", hashtype)
|
|
|
|
hash = hash256(s)
|
|
|
|
return (hash, None)
|
|
|
|
# TODO: Allow cached hashPrevouts/hashSequence/hashOutputs to be provided.
|
|
# Performance optimization probably not necessary for python tests, however.
|
|
# Note that this corresponds to sigversion == 1 in EvalScript, which is used
|
|
# for version 0 witnesses.
|
|
def SegwitVersion1SignatureHash(script, txTo, inIdx, hashtype, amount):
|
|
|
|
hashPrevouts = 0
|
|
hashSequence = 0
|
|
hashOutputs = 0
|
|
|
|
if not (hashtype & SIGHASH_ANYONECANPAY):
|
|
serialize_prevouts = bytes()
|
|
for i in txTo.vin:
|
|
serialize_prevouts += i.prevout.serialize()
|
|
hashPrevouts = uint256_from_str(hash256(serialize_prevouts))
|
|
|
|
if (not (hashtype & SIGHASH_ANYONECANPAY) and (hashtype & 0x1f) != SIGHASH_SINGLE and (hashtype & 0x1f) != SIGHASH_NONE):
|
|
serialize_sequence = bytes()
|
|
for i in txTo.vin:
|
|
serialize_sequence += struct.pack("<I", i.nSequence)
|
|
hashSequence = uint256_from_str(hash256(serialize_sequence))
|
|
|
|
if ((hashtype & 0x1f) != SIGHASH_SINGLE and (hashtype & 0x1f) != SIGHASH_NONE):
|
|
serialize_outputs = bytes()
|
|
for o in txTo.vout:
|
|
serialize_outputs += o.serialize()
|
|
hashOutputs = uint256_from_str(hash256(serialize_outputs))
|
|
elif ((hashtype & 0x1f) == SIGHASH_SINGLE and inIdx < len(txTo.vout)):
|
|
serialize_outputs = txTo.vout[inIdx].serialize()
|
|
hashOutputs = uint256_from_str(hash256(serialize_outputs))
|
|
|
|
ss = bytes()
|
|
ss += struct.pack("<i", txTo.nVersion)
|
|
ss += ser_uint256(hashPrevouts)
|
|
ss += ser_uint256(hashSequence)
|
|
ss += txTo.vin[inIdx].prevout.serialize()
|
|
ss += ser_string(script)
|
|
ss += struct.pack("<q", amount)
|
|
ss += struct.pack("<I", txTo.vin[inIdx].nSequence)
|
|
ss += ser_uint256(hashOutputs)
|
|
ss += struct.pack("<i", txTo.nLockTime)
|
|
ss += struct.pack("<I", hashtype)
|
|
|
|
return hash256(ss)
|