def return_op(computation):
start_position, size = computation.stack_pop(num_items=2, type_hint=constants.UINT256)
computation.extend_memory(start_position, size)
output = computation.memory_read(start_position, size)
computation.output = bytes(output)
raise Halt('RETURN')
def _selfdestruct(computation, beneficiary):
local_balance = computation.state.account_db.get_balance(computation.msg.storage_address)
beneficiary_balance = computation.state.account_db.get_balance(beneficiary)
# 1st: Transfer to beneficiary
computation.state.account_db.set_balance(beneficiary, local_balance + beneficiary_balance)
# 2nd: Zero the balance of the address being deleted (must come after
# sending to beneficiary in case the contract named itself as the
# beneficiary.
computation.state.account_db.set_balance(computation.msg.storage_address, 0)
computation.logger.debug(
"SELFDESTRUCT: %s (%s) -> %s",
encode_hex(computation.msg.storage_address),
local_balance,
encode_hex(beneficiary),
)
# 3rd: Register the account to be deleted
computation.register_account_for_deletion(beneficiary)
raise Halt('SELFDESTRUCT')
def selfdestruct(computation):
beneficiary = force_bytes_to_address(
computation.stack_pop(type_hint=constants.BYTES))
_selfdestruct(computation, beneficiary)
raise Halt('SELFDESTRUCT')
def stop(computation):
raise Halt('STOP')
