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dash/test/functional/test_framework/script.py
MarcoFalke 9f4f52ae4e
Merge #13054: tests: Enable automatic detection of undefined names in Python tests scripts. Remove wildcard imports. 
68400d8b96 tests: Use explicit imports (practicalswift)

Pull request description:

  Enable automatic detection of undefined names in Python tests scripts. Remove wildcard imports.

  Wildcard imports make it unclear which names are present in the namespace, confusing both readers and many automated tools.

  An additional benefit of not using wildcard imports in tests scripts is that readers of a test script then can infer the rough testing scope just by looking at the imports.

  Before this commit:

  ```
  $ contrib/devtools/lint-python.sh | head -10
  ./test/functional/feature_rbf.py:8:1: F403 'from test_framework.util import *' used; unable to detect undefined names
  ./test/functional/feature_rbf.py:9:1: F403 'from test_framework.script import *' used; unable to detect undefined names
  ./test/functional/feature_rbf.py:10:1: F403 'from test_framework.mininode import *' used; unable to detect undefined names
  ./test/functional/feature_rbf.py:15:12: F405 bytes_to_hex_str may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
  ./test/functional/feature_rbf.py:17:58: F405 CScript may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
  ./test/functional/feature_rbf.py:25:13: F405 COIN may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
  ./test/functional/feature_rbf.py:26:31: F405 satoshi_round may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
  ./test/functional/feature_rbf.py:26:60: F405 COIN may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
  ./test/functional/feature_rbf.py:30:41: F405 satoshi_round may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
  ./test/functional/feature_rbf.py:30:68: F405 COIN may be undefined, or defined from star imports: test_framework.mininode, test_framework.script, test_framework.util
  $
  ```

  After this commit:

  ```
  $ contrib/devtools/lint-python.sh | head -10
  $
  ```

Tree-SHA512: 3f826d39cffb6438388e5efcb20a9622ff8238247e882d68f7b38609877421b2a8e10e9229575f8eb6a8fa42dec4256986692e92922c86171f750a0e887438d9
2021-07-06 20:29:33 +03:00

641 lines
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#!/usr/bin/env python3
# Copyright (c) 2015-2016 The Bitcoin Core developers
# Distributed under the MIT software license, see the accompanying
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
"""Functionality to build scripts, as well as SignatureHash().
This file is modified from python-bitcoinlib.
"""
from binascii import hexlify
import hashlib
import struct
from .bignum import bn2vch
from .messages import CTransaction, CTxOut, sha256, hash256
MAX_SCRIPT_ELEMENT_SIZE = 520
OPCODE_NAMES = {}
def hash160(s):
return hashlib.new('ripemd160', sha256(s)).digest()
_opcode_instances = []
class CScriptOp(int):
"""A single script opcode"""
__slots__ = []
@staticmethod
def encode_op_pushdata(d):
"""Encode a PUSHDATA op, returning bytes"""
if len(d) < 0x4c:
return b'' + bytes([len(d)]) + d # OP_PUSHDATA
elif len(d) <= 0xff:
return b'\x4c' + bytes([len(d)]) + d # OP_PUSHDATA1
elif len(d) <= 0xffff:
return b'\x4d' + struct.pack(b'<H', len(d)) + d # OP_PUSHDATA2
elif len(d) <= 0xffffffff:
return b'\x4e' + struct.pack(b'<I', len(d)) + d # OP_PUSHDATA4
else:
raise ValueError("Data too long to encode in a PUSHDATA op")
@staticmethod
def encode_op_n(n):
"""Encode a small integer op, returning an opcode"""
if not (0 <= n <= 16):
raise ValueError('Integer must be in range 0 <= n <= 16, got %d' % n)
if n == 0:
return OP_0
else:
return CScriptOp(OP_1 + n-1)
def decode_op_n(self):
"""Decode a small integer opcode, returning an integer"""
if self == OP_0:
return 0
if not (self == OP_0 or OP_1 <= self <= OP_16):
raise ValueError('op %r is not an OP_N' % self)
return int(self - OP_1+1)
def is_small_int(self):
"""Return true if the op pushes a small integer to the stack"""
if 0x51 <= self <= 0x60 or self == 0:
return True
else:
return False
def __str__(self):
return repr(self)
def __repr__(self):
if self in OPCODE_NAMES:
return OPCODE_NAMES[self]
else:
return 'CScriptOp(0x%x)' % self
def __new__(cls, n):
try:
return _opcode_instances[n]
except IndexError:
assert len(_opcode_instances) == n
_opcode_instances.append(super(CScriptOp, cls).__new__(cls, n))
return _opcode_instances[n]
# Populate opcode instance table
for n in range(0xff+1):
CScriptOp(n)
# push value
OP_0 = CScriptOp(0x00)
OP_FALSE = OP_0
OP_PUSHDATA1 = CScriptOp(0x4c)
OP_PUSHDATA2 = CScriptOp(0x4d)
OP_PUSHDATA4 = CScriptOp(0x4e)
OP_1NEGATE = CScriptOp(0x4f)
OP_RESERVED = CScriptOp(0x50)
OP_1 = CScriptOp(0x51)
OP_TRUE=OP_1
OP_2 = CScriptOp(0x52)
OP_3 = CScriptOp(0x53)
OP_4 = CScriptOp(0x54)
OP_5 = CScriptOp(0x55)
OP_6 = CScriptOp(0x56)
OP_7 = CScriptOp(0x57)
OP_8 = CScriptOp(0x58)
OP_9 = CScriptOp(0x59)
OP_10 = CScriptOp(0x5a)
OP_11 = CScriptOp(0x5b)
OP_12 = CScriptOp(0x5c)
OP_13 = CScriptOp(0x5d)
OP_14 = CScriptOp(0x5e)
OP_15 = CScriptOp(0x5f)
OP_16 = CScriptOp(0x60)
# control
OP_NOP = CScriptOp(0x61)
OP_VER = CScriptOp(0x62)
OP_IF = CScriptOp(0x63)
OP_NOTIF = CScriptOp(0x64)
OP_VERIF = CScriptOp(0x65)
OP_VERNOTIF = CScriptOp(0x66)
OP_ELSE = CScriptOp(0x67)
OP_ENDIF = CScriptOp(0x68)
OP_VERIFY = CScriptOp(0x69)
OP_RETURN = CScriptOp(0x6a)
# stack ops
OP_TOALTSTACK = CScriptOp(0x6b)
OP_FROMALTSTACK = CScriptOp(0x6c)
OP_2DROP = CScriptOp(0x6d)
OP_2DUP = CScriptOp(0x6e)
OP_3DUP = CScriptOp(0x6f)
OP_2OVER = CScriptOp(0x70)
OP_2ROT = CScriptOp(0x71)
OP_2SWAP = CScriptOp(0x72)
OP_IFDUP = CScriptOp(0x73)
OP_DEPTH = CScriptOp(0x74)
OP_DROP = CScriptOp(0x75)
OP_DUP = CScriptOp(0x76)
OP_NIP = CScriptOp(0x77)
OP_OVER = CScriptOp(0x78)
OP_PICK = CScriptOp(0x79)
OP_ROLL = CScriptOp(0x7a)
OP_ROT = CScriptOp(0x7b)
OP_SWAP = CScriptOp(0x7c)
OP_TUCK = CScriptOp(0x7d)
# splice ops
OP_CAT = CScriptOp(0x7e)
OP_SPLIT = CScriptOp(0x7f)
OP_SIZE = CScriptOp(0x82)
# conversion ops
OP_NUM2BIN = CScriptOp(0x80)
OP_BIN2NUM = CScriptOp(0x81)
# bit logic
OP_INVERT = CScriptOp(0x83)
OP_AND = CScriptOp(0x84)
OP_OR = CScriptOp(0x85)
OP_XOR = CScriptOp(0x86)
OP_EQUAL = CScriptOp(0x87)
OP_EQUALVERIFY = CScriptOp(0x88)
OP_RESERVED1 = CScriptOp(0x89)
OP_RESERVED2 = CScriptOp(0x8a)
# numeric
OP_1ADD = CScriptOp(0x8b)
OP_1SUB = CScriptOp(0x8c)
OP_2MUL = CScriptOp(0x8d)
OP_2DIV = CScriptOp(0x8e)
OP_NEGATE = CScriptOp(0x8f)
OP_ABS = CScriptOp(0x90)
OP_NOT = CScriptOp(0x91)
OP_0NOTEQUAL = CScriptOp(0x92)
OP_ADD = CScriptOp(0x93)
OP_SUB = CScriptOp(0x94)
OP_MUL = CScriptOp(0x95)
OP_DIV = CScriptOp(0x96)
OP_MOD = CScriptOp(0x97)
OP_LSHIFT = CScriptOp(0x98)
OP_RSHIFT = CScriptOp(0x99)
OP_BOOLAND = CScriptOp(0x9a)
OP_BOOLOR = CScriptOp(0x9b)
OP_NUMEQUAL = CScriptOp(0x9c)
OP_NUMEQUALVERIFY = CScriptOp(0x9d)
OP_NUMNOTEQUAL = CScriptOp(0x9e)
OP_LESSTHAN = CScriptOp(0x9f)
OP_GREATERTHAN = CScriptOp(0xa0)
OP_LESSTHANOREQUAL = CScriptOp(0xa1)
OP_GREATERTHANOREQUAL = CScriptOp(0xa2)
OP_MIN = CScriptOp(0xa3)
OP_MAX = CScriptOp(0xa4)
OP_WITHIN = CScriptOp(0xa5)
# crypto
OP_RIPEMD160 = CScriptOp(0xa6)
OP_SHA1 = CScriptOp(0xa7)
OP_SHA256 = CScriptOp(0xa8)
OP_HASH160 = CScriptOp(0xa9)
OP_HASH256 = CScriptOp(0xaa)
OP_CODESEPARATOR = CScriptOp(0xab)
OP_CHECKSIG = CScriptOp(0xac)
OP_CHECKSIGVERIFY = CScriptOp(0xad)
OP_CHECKMULTISIG = CScriptOp(0xae)
OP_CHECKMULTISIGVERIFY = CScriptOp(0xaf)
# expansion
OP_NOP1 = CScriptOp(0xb0)
OP_CHECKLOCKTIMEVERIFY = CScriptOp(0xb1)
OP_CHECKSEQUENCEVERIFY = CScriptOp(0xb2)
OP_NOP4 = CScriptOp(0xb3)
OP_NOP5 = CScriptOp(0xb4)
OP_NOP6 = CScriptOp(0xb5)
OP_NOP7 = CScriptOp(0xb6)
OP_NOP8 = CScriptOp(0xb7)
OP_NOP9 = CScriptOp(0xb8)
OP_NOP10 = CScriptOp(0xb9)
# template matching params
OP_SMALLINTEGER = CScriptOp(0xfa)
OP_PUBKEYS = CScriptOp(0xfb)
OP_PUBKEYHASH = CScriptOp(0xfd)
OP_PUBKEY = CScriptOp(0xfe)
OP_INVALIDOPCODE = CScriptOp(0xff)
OPCODE_NAMES.update({
OP_0 : 'OP_0',
OP_PUSHDATA1 : 'OP_PUSHDATA1',
OP_PUSHDATA2 : 'OP_PUSHDATA2',
OP_PUSHDATA4 : 'OP_PUSHDATA4',
OP_1NEGATE : 'OP_1NEGATE',
OP_RESERVED : 'OP_RESERVED',
OP_1 : 'OP_1',
OP_2 : 'OP_2',
OP_3 : 'OP_3',
OP_4 : 'OP_4',
OP_5 : 'OP_5',
OP_6 : 'OP_6',
OP_7 : 'OP_7',
OP_8 : 'OP_8',
OP_9 : 'OP_9',
OP_10 : 'OP_10',
OP_11 : 'OP_11',
OP_12 : 'OP_12',
OP_13 : 'OP_13',
OP_14 : 'OP_14',
OP_15 : 'OP_15',
OP_16 : 'OP_16',
OP_NOP : 'OP_NOP',
OP_VER : 'OP_VER',
OP_IF : 'OP_IF',
OP_NOTIF : 'OP_NOTIF',
OP_VERIF : 'OP_VERIF',
OP_VERNOTIF : 'OP_VERNOTIF',
OP_ELSE : 'OP_ELSE',
OP_ENDIF : 'OP_ENDIF',
OP_VERIFY : 'OP_VERIFY',
OP_RETURN : 'OP_RETURN',
OP_TOALTSTACK : 'OP_TOALTSTACK',
OP_FROMALTSTACK : 'OP_FROMALTSTACK',
OP_2DROP : 'OP_2DROP',
OP_2DUP : 'OP_2DUP',
OP_3DUP : 'OP_3DUP',
OP_2OVER : 'OP_2OVER',
OP_2ROT : 'OP_2ROT',
OP_2SWAP : 'OP_2SWAP',
OP_IFDUP : 'OP_IFDUP',
OP_DEPTH : 'OP_DEPTH',
OP_DROP : 'OP_DROP',
OP_DUP : 'OP_DUP',
OP_NIP : 'OP_NIP',
OP_OVER : 'OP_OVER',
OP_PICK : 'OP_PICK',
OP_ROLL : 'OP_ROLL',
OP_ROT : 'OP_ROT',
OP_SWAP : 'OP_SWAP',
OP_TUCK : 'OP_TUCK',
OP_CAT : 'OP_CAT',
OP_SPLIT : 'OP_SPLIT',
OP_NUM2BIN : 'OP_NUM2BIN',
OP_BIN2NUM : 'OP_BIN2NUM',
OP_SIZE : 'OP_SIZE',
OP_INVERT : 'OP_INVERT',
OP_AND : 'OP_AND',
OP_OR : 'OP_OR',
OP_XOR : 'OP_XOR',
OP_EQUAL : 'OP_EQUAL',
OP_EQUALVERIFY : 'OP_EQUALVERIFY',
OP_RESERVED1 : 'OP_RESERVED1',
OP_RESERVED2 : 'OP_RESERVED2',
OP_1ADD : 'OP_1ADD',
OP_1SUB : 'OP_1SUB',
OP_2MUL : 'OP_2MUL',
OP_2DIV : 'OP_2DIV',
OP_NEGATE : 'OP_NEGATE',
OP_ABS : 'OP_ABS',
OP_NOT : 'OP_NOT',
OP_0NOTEQUAL : 'OP_0NOTEQUAL',
OP_ADD : 'OP_ADD',
OP_SUB : 'OP_SUB',
OP_MUL : 'OP_MUL',
OP_DIV : 'OP_DIV',
OP_MOD : 'OP_MOD',
OP_LSHIFT : 'OP_LSHIFT',
OP_RSHIFT : 'OP_RSHIFT',
OP_BOOLAND : 'OP_BOOLAND',
OP_BOOLOR : 'OP_BOOLOR',
OP_NUMEQUAL : 'OP_NUMEQUAL',
OP_NUMEQUALVERIFY : 'OP_NUMEQUALVERIFY',
OP_NUMNOTEQUAL : 'OP_NUMNOTEQUAL',
OP_LESSTHAN : 'OP_LESSTHAN',
OP_GREATERTHAN : 'OP_GREATERTHAN',
OP_LESSTHANOREQUAL : 'OP_LESSTHANOREQUAL',
OP_GREATERTHANOREQUAL : 'OP_GREATERTHANOREQUAL',
OP_MIN : 'OP_MIN',
OP_MAX : 'OP_MAX',
OP_WITHIN : 'OP_WITHIN',
OP_RIPEMD160 : 'OP_RIPEMD160',
OP_SHA1 : 'OP_SHA1',
OP_SHA256 : 'OP_SHA256',
OP_HASH160 : 'OP_HASH160',
OP_HASH256 : 'OP_HASH256',
OP_CODESEPARATOR : 'OP_CODESEPARATOR',
OP_CHECKSIG : 'OP_CHECKSIG',
OP_CHECKSIGVERIFY : 'OP_CHECKSIGVERIFY',
OP_CHECKMULTISIG : 'OP_CHECKMULTISIG',
OP_CHECKMULTISIGVERIFY : 'OP_CHECKMULTISIGVERIFY',
OP_NOP1 : 'OP_NOP1',
OP_CHECKLOCKTIMEVERIFY : 'OP_CHECKLOCKTIMEVERIFY',
OP_CHECKSEQUENCEVERIFY : 'OP_CHECKSEQUENCEVERIFY',
OP_NOP4 : 'OP_NOP4',
OP_NOP5 : 'OP_NOP5',
OP_NOP6 : 'OP_NOP6',
OP_NOP7 : 'OP_NOP7',
OP_NOP8 : 'OP_NOP8',
OP_NOP9 : 'OP_NOP9',
OP_NOP10 : 'OP_NOP10',
OP_SMALLINTEGER : 'OP_SMALLINTEGER',
OP_PUBKEYS : 'OP_PUBKEYS',
OP_PUBKEYHASH : 'OP_PUBKEYHASH',
OP_PUBKEY : 'OP_PUBKEY',
OP_INVALIDOPCODE : 'OP_INVALIDOPCODE',
})
class CScriptInvalidError(Exception):
"""Base class for CScript exceptions"""
pass
class CScriptTruncatedPushDataError(CScriptInvalidError):
"""Invalid pushdata due to truncation"""
def __init__(self, msg, data):
self.data = data
super(CScriptTruncatedPushDataError, self).__init__(msg)
# This is used, eg, for blockchain heights in coinbase scripts (bip34)
class CScriptNum():
def __init__(self, d=0):
self.value = d
@staticmethod
def encode(obj):
r = bytearray(0)
if obj.value == 0:
return bytes(r)
neg = obj.value < 0
absvalue = -obj.value if neg else obj.value
while (absvalue):
r.append(absvalue & 0xff)
absvalue >>= 8
if r[-1] & 0x80:
r.append(0x80 if neg else 0)
elif neg:
r[-1] |= 0x80
return bytes([len(r)]) + r
class CScript(bytes):
"""Serialized script
A bytes subclass, so you can use this directly whenever bytes are accepted.
Note that this means that indexing does *not* work - you'll get an index by
byte rather than opcode. This format was chosen for efficiency so that the
general case would not require creating a lot of little CScriptOP objects.
iter(script) however does iterate by opcode.
"""
@classmethod
def __coerce_instance(cls, other):
# Coerce other into bytes
if isinstance(other, CScriptOp):
other = bytes([other])
elif isinstance(other, CScriptNum):
if (other.value == 0):
other = bytes([CScriptOp(OP_0)])
else:
other = CScriptNum.encode(other)
elif isinstance(other, int):
if 0 <= other <= 16:
other = bytes([CScriptOp.encode_op_n(other)])
elif other == -1:
other = bytes([OP_1NEGATE])
else:
other = CScriptOp.encode_op_pushdata(bn2vch(other))
elif isinstance(other, (bytes, bytearray)):
other = CScriptOp.encode_op_pushdata(other)
return other
def __add__(self, other):
# Do the coercion outside of the try block so that errors in it are
# noticed.
other = self.__coerce_instance(other)
try:
# bytes.__add__ always returns bytes instances unfortunately
return CScript(super(CScript, self).__add__(other))
except TypeError:
raise TypeError('Can not add a %r instance to a CScript' % other.__class__)
def join(self, iterable):
# join makes no sense for a CScript()
raise NotImplementedError
def __new__(cls, value=b''):
if isinstance(value, bytes) or isinstance(value, bytearray):
return super(CScript, cls).__new__(cls, value)
else:
def coerce_iterable(iterable):
for instance in iterable:
yield cls.__coerce_instance(instance)
# Annoyingly on both python2 and python3 bytes.join() always
# returns a bytes instance even when subclassed.
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')" % hexlify(o).decode('ascii')
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()
s += struct.pack(b"<I", hashtype)
hash = hash256(s)
return (hash, None)
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