def get_call_params(self, computation: ComputationAPI) -> CallParams:
gas = computation.stack_pop1_int()
code_address = force_bytes_to_address(computation.stack_pop1_bytes())
(
memory_input_start_position,
memory_input_size,
memory_output_start_position,
memory_output_size,
) = computation.stack_pop_ints(4)
to = computation.msg.storage_address
sender = computation.msg.sender
value = computation.msg.value
return (
gas,
value,
to,
sender,
code_address,
memory_input_start_position,
memory_input_size,
memory_output_start_position,
memory_output_size,
False, # should_transfer_value,
computation.msg.is_static,
)
def get_call_params(self, computation: ComputationAPI) -> CallParams:
gas = computation.stack_pop1_int()
to = force_bytes_to_address(computation.stack_pop1_bytes())
(
value,
memory_input_start_position,
memory_input_size,
memory_output_start_position,
memory_output_size,
) = computation.stack_pop_ints(5)
return (
gas,
value,
to,
None, # sender
None, # code_address
memory_input_start_position,
memory_input_size,
memory_output_start_position,
memory_output_size,
True, # should_transfer_value,
computation.msg.is_static,
)
def selfdestruct_eip150(computation: ComputationAPI) -> None:
beneficiary = force_bytes_to_address(computation.stack_pop1_bytes())
if not computation.state.account_exists(beneficiary):
computation.consume_gas(
constants.GAS_SELFDESTRUCT_NEWACCOUNT,
reason=mnemonics.SELFDESTRUCT,
)
_selfdestruct(computation, beneficiary)
def mstore(computation: ComputationAPI) -> None:
start_position = computation.stack_pop1_int()
value = computation.stack_pop1_bytes()
padded_value = value.rjust(32, b'\x00')
normalized_value = padded_value[-32:]
computation.extend_memory(start_position, 32)
computation.memory_write(start_position, 32, normalized_value)
def selfdestruct_eip161(computation: ComputationAPI) -> None:
beneficiary = force_bytes_to_address(computation.stack_pop1_bytes())
is_dead = (
not computation.state.account_exists(beneficiary) or
computation.state.account_is_empty(beneficiary)
)
if is_dead and computation.state.get_balance(computation.msg.storage_address):
computation.consume_gas(
constants.GAS_SELFDESTRUCT_NEWACCOUNT,
reason=mnemonics.SELFDESTRUCT,
)
_selfdestruct(computation, beneficiary)
def extcodehash(computation: ComputationAPI) -> None:
"""
Return the code hash for a given address.
EIP: https://github.com/ethereum/EIPs/blob/master/EIPS/eip-1052.md
"""
account = force_bytes_to_address(computation.stack_pop1_bytes())
state = computation.state
if state.account_is_empty(account):
computation.stack_push_bytes(constants.NULL_BYTE)
else:
computation.stack_push_bytes(state.get_code_hash(account))
def extcodecopy(computation: ComputationAPI) -> None:
account = force_bytes_to_address(computation.stack_pop1_bytes())
(
mem_start_position,
code_start_position,
size,
) = computation.stack_pop_ints(3)
computation.extend_memory(mem_start_position, size)
word_count = ceil32(size) // 32
copy_gas_cost = constants.GAS_COPY * word_count
computation.consume_gas(
copy_gas_cost,
reason='EXTCODECOPY: word gas cost',
)
code = computation.state.get_code(account)
code_bytes = code[code_start_position:code_start_position + size]
padded_code_bytes = code_bytes.ljust(size, b'\x00')
computation.memory_write(mem_start_position, size, padded_code_bytes)
def selfdestruct(computation: ComputationAPI) -> None:
beneficiary = force_bytes_to_address(computation.stack_pop1_bytes())
_selfdestruct(computation, beneficiary)
def extcodesize(computation: ComputationAPI) -> None:
account = force_bytes_to_address(computation.stack_pop1_bytes())
code_size = len(computation.state.get_code(account))
computation.stack_push_int(code_size)
def balance(computation: ComputationAPI) -> None:
addr = force_bytes_to_address(computation.stack_pop1_bytes())
_push_balance_of_address(addr, computation)