class TxVerifier():
def __init__(self, runmode):
self.runmode = runmode
self.tx_serializer = TxSerializer()
self.script_serializer = ScriptSerializer()
"""
basic_check: run tests that don't require any context.
"""
def basic_checks(self, tx):
self.check_size_limit(tx)
self.check_vin_empty(tx)
self.check_vout_empty(tx)
self.check_money_range(tx)
self.check_dupplicate_inputs(tx)
self.check_coinbase_script_size(tx)
self.check_null_inputs(tx)
def check_size_limit(self, tx):
if not tx.rawdata:
tx.rawdata = self.tx_serializer.serialize(tx)
if len(tx.rawdata) > MAX_BLOCK_SIZE:
raise Exception("Transaction too large : %d bytes" %
(len(tx.rawdata)))
def check_vin_empty(self, tx):
if (not tx.in_list):
raise Exception("vin empty")
def check_vout_empty(self, tx):
if (not tx.out_list):
raise Exception("vout empty")
def check_money_range(self, tx):
for txout in tx.out_list:
if not is_money_range(txout.value):
raise Exception("txout not in money range")
if not is_money_range(sum(txout.value for txout in tx.out_list)):
raise Exception("txout total not in money range")
def check_dupplicate_inputs(self, tx):
inputs = set()
for txin in tx.in_list:
if txin.previous_output in inputs:
raise Exception("dupplicate txin")
inputs.add(txin.previous_output)
def check_coinbase_script_size(self, tx):
if tx.iscoinbase():
bin_script = self.script_serializer.serialize(tx.in_list[0].script)
if (len(bin_script) < 2 or len(bin_script) > 100):
raise Exception("incorrect coinbase script size : %d" %
(len(bin_script)))
def check_null_inputs(self, tx):
if not tx.iscoinbase():
for txin in tx.in_list:
if (txin.previous_output.is_null()):
raise Exception("null prevout")
class TxVerifier():
def __init__(self, runmode):
self.runmode = runmode
self.tx_serializer = TxSerializer()
self.script_serializer = ScriptSerializer()
"""
basic_check: run tests that don't require any context.
"""
def basic_checks(self, tx):
self.check_size_limit(tx)
self.check_vin_empty(tx)
self.check_vout_empty(tx)
self.check_money_range(tx)
self.check_dupplicate_inputs(tx)
self.check_coinbase_script_size(tx)
self.check_null_inputs(tx)
def check_size_limit(self, tx):
if not tx.rawdata:
tx.rawdata = self.tx_serializer.serialize(tx)
if len(tx.rawdata) > MAX_BLOCK_SIZE:
raise Exception("Transaction too large : %d bytes" % (len(tx.rawdata)))
def check_vin_empty(self, tx):
if (not tx.in_list):
raise Exception("vin empty" )
def check_vout_empty(self, tx):
if (not tx.out_list):
raise Exception("vout empty" )
def check_money_range(self, tx):
for txout in tx.out_list:
if not is_money_range(txout.value):
raise Exception("txout not in money range")
if not is_money_range(sum(txout.value for txout in tx.out_list)):
raise Exception("txout total not in money range")
def check_dupplicate_inputs(self, tx):
inputs = set()
for txin in tx.in_list:
if txin.previous_output in inputs:
raise Exception("dupplicate txin")
inputs.add(txin.previous_output)
def check_coinbase_script_size(self, tx):
if tx.iscoinbase():
bin_script = self.script_serializer.serialize(tx.in_list[0].script)
if (len(bin_script) < 2 or len(bin_script) > 100):
raise Exception("incorrect coinbase script size : %d" % (len(bin_script)))
def check_null_inputs(self, tx):
if not tx.iscoinbase():
for txin in tx.in_list:
if (txin.previous_output.is_null()):
raise Exception("null prevout")
class VarstrScriptSerializer(Serializer):
def __init__(self):
self.serializer = ScriptSerializer()
self.strencoder = VarstrSerializer()
def serialize(self, script):
scriptstr = self.serializer.serialize(script)
return (self.strencoder.serialize(scriptstr))
def get_size(self, script):
return self.strencoder.get_size_for_len(self.serializer.get_size(script))
def deserialize(self, data, cursor=0):
scriptstr, newcursor = self.strencoder.deserialize(data, cursor)
return (self.serializer.deserialize(scriptstr), newcursor)
class VarstrScriptSerializer(Serializer):
def __init__(self):
self.serializer = ScriptSerializer()
self.strencoder = VarstrSerializer()
def serialize(self, script):
scriptstr = self.serializer.serialize(script)
return (self.strencoder.serialize(scriptstr))
def get_size(self, script):
return self.strencoder.get_size_for_len(
self.serializer.get_size(script))
def deserialize(self, data, cursor=0):
scriptstr, newcursor = self.strencoder.deserialize(data, cursor)
return (self.serializer.deserialize(scriptstr), newcursor)
