(self, z)
| 136 | return encode_varint(total) + result |
| 137 | |
| 138 | def evaluate(self, z): |
| 139 | # create a copy as we may need to add to this list if we have a |
| 140 | # RedeemScript |
| 141 | cmds = self.cmds[:] |
| 142 | stack = [] |
| 143 | altstack = [] |
| 144 | while len(cmds) > 0: |
| 145 | cmd = cmds.pop(0) |
| 146 | if type(cmd) == int: |
| 147 | # do what the opcode says |
| 148 | operation = OP_CODE_FUNCTIONS[cmd] |
| 149 | if cmd in (99, 100): |
| 150 | # op_if/op_notif require the cmds array |
| 151 | if not operation(stack, cmds): |
| 152 | LOGGER.info('bad op: {}'.format(OP_CODE_NAMES[cmd])) |
| 153 | return False |
| 154 | elif cmd in (107, 108): |
| 155 | # op_toaltstack/op_fromaltstack require the altstack |
| 156 | if not operation(stack, altstack): |
| 157 | LOGGER.info('bad op: {}'.format(OP_CODE_NAMES[cmd])) |
| 158 | return False |
| 159 | elif cmd in (172, 173, 174, 175): |
| 160 | # these are signing operations, they need a sig_hash |
| 161 | # to check against |
| 162 | if not operation(stack, z): |
| 163 | LOGGER.info('bad op: {}'.format(OP_CODE_NAMES[cmd])) |
| 164 | return False |
| 165 | else: |
| 166 | if not operation(stack): |
| 167 | LOGGER.info('bad op: {}'.format(OP_CODE_NAMES[cmd])) |
| 168 | return False |
| 169 | # tag::source1[] |
| 170 | else: |
| 171 | stack.append(cmd) |
| 172 | if len(cmds) == 3 and cmds[0] == 0xa9 \ |
| 173 | and type(cmds[1]) == bytes and len(cmds[1]) == 20 \ |
| 174 | and cmds[2] == 0x87: # <1> |
| 175 | cmds.pop() # <2> |
| 176 | h160 = cmds.pop() |
| 177 | cmds.pop() |
| 178 | if not op_hash160(stack): # <3> |
| 179 | return False |
| 180 | stack.append(h160) |
| 181 | if not op_equal(stack): |
| 182 | return False |
| 183 | if not op_verify(stack): # <4> |
| 184 | LOGGER.info('bad p2sh h160') |
| 185 | return False |
| 186 | redeem_script = encode_varint(len(cmd)) + cmd # <5> |
| 187 | stream = BytesIO(redeem_script) |
| 188 | cmds.extend(Script.parse(stream).cmds) # <6> |
| 189 | # end::source1[] |
| 190 | if len(stack) == 0: |
| 191 | return False |
| 192 | if stack.pop() == b'': |
| 193 | return False |
| 194 | return True |
| 195 |
no test coverage detected