def eval(self, script):
# check script size
if (cached_serialized_size(script) > 10000):
raise Exception("Serialized script size > 10000")
# check disable opcodes
disabled = [i.opcode for i in script.instructions if i.opcode in self.disabled_opcodes]
if disabled:
raise Exception("opcodes disabled: " + ",".join(OPCODE_NAMES[op] for op in disabled))
self.current_script = script
for i in script.instructions:
op = is_pushdata_with_param(i.opcode) and OP_PUSHDATA or i.opcode
executed = all(self.cond_stack)
if executed or is_conditionnal(op):
if op in self.disabled_opcodes:
print OPCODE_NAMES[op]
OPCODE_FUNCTIONS[op](self, i)
#print "stack:", [hexstr(elm)[:10] for elm in self.stack]
if self.cond_stack:
raise Exception("Conditionals not matching")
def __str__(self):
if is_pushdata_with_param(self.opcode):
return self.__pushdata__str__()
if (self.opcode in OPCODE_NAMES):
return OPCODE_NAMES[self.opcode]
return ("UNKNOWN(%d)" % self.opcode)
def __hash__(self):
if is_pushdata_with_param(self.opcode):
return hash(self.data)
return self.opcode
def deserialize(self, data, cursor=0):
op = ord(data[cursor])
if is_pushdata_with_param(op):
return (self._deserialize_pushdata(data, cursor))
return (Instruction(op), cursor + 1)
def __init__(self, opcode, data=None):
self.opcode = opcode #value defined in opcodes.py
self.data = data #optional (bytestring for pushdata)
if is_pushdata_with_param(self.opcode) and len(self.data) > 520:
raise Exception("PUSH_DATA with >520 bytes")
def get_size(self, instr):
if is_pushdata_with_param(instr.opcode):
return self._get_size_pushdata(instr)
return 1
def serialize(self, instr):
if is_pushdata_with_param(instr.opcode):
return self.serialize_pushdata(instr)
return chr(instr.opcode)
def __hash__(self):
if is_pushdata_with_param(self.opcode):
return hash(self.data)
return self.opcode
def __str__(self):
if is_pushdata_with_param(self.opcode):
return self.__pushdata__str__()
if self.opcode in OPCODE_NAMES:
return OPCODE_NAMES[self.opcode]
return "UNKNOWN(%d)" % self.opcode
def __init__(self, opcode, data=None):
self.opcode = opcode # value defined in opcodes.py
self.data = data # optional (bytestring for pushdata)
if is_pushdata_with_param(self.opcode) and len(self.data) > 520:
raise Exception("PUSH_DATA with >520 bytes")
