def call_validation_code(state, validation_code_addr, msg_hash, signature):
"""Call validationCodeAddr on the main shard with 200000 gas, 0 value,
the block_number concatenated with the sigIndex'th signature as input data gives output 1.
"""
dummy_addr = b'\xff' * 20
data = msg_hash + signature
msg = vm.Message(dummy_addr, validation_code_addr, 0, 200000, data)
result = apply_message(state.ephemeral_clone(), msg)
if result is None:
raise MessageFailed()
return bool(utils.big_endian_to_int(result))
def call(self, sender=k0, to=b'\x00' * 20, value=0,
data=b'', startgas=STARTGAS, gasprice=GASPRICE):
self.state.commit()
sender_addr = privtoaddr(sender)
result = apply_message(
self.state.ephemeral_clone(),
sender=sender_addr,
to=to,
code_address=to,
value=value,
data=data,
gas=startgas)
if result is None:
raise TransactionFailed()
return result
def call_msg(state,
ct,
func,
args,
sender_addr,
to,
value=0,
startgas=STARTGAS):
abidata = vm.CallData(
[utils.safe_ord(x) for x in ct.encode_function_call(func, args)])
msg = vm.Message(sender_addr, to, value, startgas, abidata)
result = apply_message(state, msg)
if result is None:
raise MessageFailed("Msg failed")
if result is False:
return result
if result == b'':
return None
o = ct.decode(func, result)
return o[0] if len(o) == 1 else o
def call(self, transaction, block_number="latest"):
from ethereum.messages import apply_message
if isinstance(block_number, bytes):
state = self.evm.chain.mk_poststate_of_blockhash(block_number)
elif isinstance(block_number, int) or isinstance(block_number, str):
block = _get_block_by_number(self.evm, block_number)
state = self.evm.chain.mk_poststate_of_blockhash(block.hash)
else:
raise BlockNotFound("Invalid block identifer.")
output = apply_message(
state,
sender=transaction['from'],
to=transaction['to'],
code_address=transaction['to'],
data=transaction['data'],
gas=transaction['gas'],
)
if output is None:
raise TransactionFailed
return output