def get_call_params(self, computation):
gas = computation.stack_pop(type_hint=constants.UINT256)
code_address = force_bytes_to_address(computation.stack_pop(type_hint=constants.BYTES))
(
memory_input_start_position,
memory_input_size,
memory_output_start_position,
memory_output_size,
) = computation.stack_pop(num_items=4, type_hint=constants.UINT256)
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):
gas = computation.stack_pop(type_hint=constants.UINT256)
to = force_bytes_to_address(computation.stack_pop(type_hint=constants.BYTES))
(
value,
memory_input_start_position,
memory_input_size,
memory_output_start_position,
memory_output_size,
) = computation.stack_pop(num_items=5, type_hint=constants.UINT256)
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):
beneficiary = force_bytes_to_address(
computation.stack_pop(type_hint=constants.BYTES))
if not computation.state.account_db.account_exists(beneficiary):
computation.consume_gas(
constants.GAS_SELFDESTRUCT_NEWACCOUNT,
reason=mnemonics.SELFDESTRUCT,
)
_selfdestruct(computation, beneficiary)
def create_random_tx(chain, is_valid=True):
return chain.create_unsigned_transaction(
nonce=0,
gas_price=1,
gas=2100000000000 if is_valid else 0,
# For simplicity, both peers create tx with the same private key.
# We rely on unique data to create truly unique txs
data=uuid.uuid4().bytes,
to=force_bytes_to_address(b'\x10\x10'),
value=1,
).as_signed_transaction(funded_address_private_key())
def selfdestruct_eip161(computation):
beneficiary = force_bytes_to_address(
computation.stack_pop(type_hint=constants.BYTES))
is_dead = (not computation.state.account_db.account_exists(beneficiary)
or computation.state.account_db.account_is_empty(beneficiary))
if is_dead and computation.state.account_db.get_balance(
computation.msg.storage_address):
computation.consume_gas(
constants.GAS_SELFDESTRUCT_NEWACCOUNT,
reason=mnemonics.SELFDESTRUCT,
)
_selfdestruct(computation, beneficiary)
def extcodecopy(computation):
account = force_bytes_to_address(computation.stack_pop(type_hint=constants.BYTES))
(
mem_start_position,
code_start_position,
size,
) = computation.stack_pop(num_items=3, type_hint=constants.UINT256)
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.account_db.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)
from hvm.vm.computation import (BaseComputation)
from hvm.exceptions import (
OutOfGas,
InsufficientFunds,
StackDepthLimit,
ReceivableTransactionNotFound,
)
from .constants import EIP170_CODE_SIZE_LIMIT
from .opcodes import HELIOS_TESTNET_OPCODES
FRONTIER_PRECOMPILES = {
force_bytes_to_address(b'\x01'): precompiles.ecrecover,
force_bytes_to_address(b'\x02'): precompiles.sha256,
force_bytes_to_address(b'\x03'): precompiles.ripemd160,
force_bytes_to_address(b'\x04'): precompiles.identity,
}
BYZANTIUM_PRECOMPILES = merge(
FRONTIER_PRECOMPILES,
{
force_bytes_to_address(b'\x05'): precompiles.modexp,
force_bytes_to_address(b'\x06'): precompiles.ecadd,
force_bytes_to_address(b'\x07'): precompiles.ecmul,
force_bytes_to_address(b'\x08'): precompiles.ecpairing,
},
)
HELIOS_TESTNET_PRECOMPILES = BYZANTIUM_PRECOMPILES
def selfdestruct(computation):
beneficiary = force_bytes_to_address(
computation.stack_pop(type_hint=constants.BYTES))
_selfdestruct(computation, beneficiary)
raise Halt('SELFDESTRUCT')
from eth_utils import to_set
from hvm import constants
from hvm.utils.address import (
force_bytes_to_address, )
THREE = force_bytes_to_address(b'\x03')
@to_set
def collect_touched_accounts(computation):
"""
Collect all of the accounts that *may* need to be deleted based on EIP161:
https://github.com/ethereum/EIPs/blob/master/EIPS/eip-161.md
also see: https://github.com/ethereum/EIPs/issues/716
"""
for beneficiary in sorted(set(computation.accounts_to_delete.values())):
if computation.is_error and computation.is_origin_computation:
# Special case to account for geth+parity bug
# https://github.com/ethereum/EIPs/issues/716
if beneficiary == THREE:
yield beneficiary
continue
else:
yield beneficiary
if computation.msg.to != constants.CREATE_CONTRACT_ADDRESS:
if computation.is_error and computation.is_origin_computation:
from hvm.exceptions import (
OutOfGas,
InsufficientFunds,
StackDepthLimit,
)
from hvm.utils.address import (
force_bytes_to_address,
)
from hvm.utils.hexadecimal import (
encode_hex,
)
from .opcodes import FRONTIER_OPCODES
FRONTIER_PRECOMPILES = {
force_bytes_to_address(b'\x01'): precompiles.ecrecover,
force_bytes_to_address(b'\x02'): precompiles.sha256,
force_bytes_to_address(b'\x03'): precompiles.ripemd160,
force_bytes_to_address(b'\x04'): precompiles.identity,
}
class FrontierComputation(BaseComputation):
"""
A class for all execution computations in the ``Frontier`` fork.
Inherits from :class:`~hvm.vm.computation.BaseComputation`
"""
# Override
opcodes = FRONTIER_OPCODES
_precompiles = FRONTIER_PRECOMPILES
import pytest
from hvm.estimators.gas import binary_gas_search_1000_tolerance
from hvm.utils.address import force_bytes_to_address
from tests.core.helpers import (
fill_block,
new_transaction,
)
ADDRESS_2 = b'\0' * 19 + b'\x02'
ADDR_1010 = force_bytes_to_address(b'\x10\x10')
@pytest.fixture
def chain(chain_without_block_validation):
return chain_without_block_validation
@pytest.mark.parametrize(
'should_sign_tx',
(True, False),
)
@pytest.mark.parametrize(
'data, gas_estimator, to, on_pending, expected',
(
(b'', None, ADDR_1010, True, 21000),
(b'', None, ADDR_1010, False, 21000),
(b'\xff' * 10, None, ADDR_1010, True, 21680),
(b'\xff' * 10, None, ADDR_1010, False, 21680),
def balance(computation):
addr = force_bytes_to_address(computation.stack_pop(type_hint=constants.BYTES))
balance = computation.state.account_db.get_balance(addr)
computation.stack_push(balance)
def extcodesize(computation):
account = force_bytes_to_address(computation.stack_pop(type_hint=constants.BYTES))
code_size = len(computation.state.account_db.get_code(account))
computation.stack_push(code_size)
from cytoolz import (
merge, )
from hvm import precompiles
from hvm.utils.address import (
force_bytes_to_address, )
from hvm.vm.forks.frontier.computation import FRONTIER_PRECOMPILES
from hvm.vm.forks.spurious_dragon.computation import SpuriousDragonComputation
from .opcodes import BYZANTIUM_OPCODES
BYZANTIUM_PRECOMPILES = merge(
FRONTIER_PRECOMPILES,
{
force_bytes_to_address(b'\x05'): precompiles.modexp,
force_bytes_to_address(b'\x06'): precompiles.ecadd,
force_bytes_to_address(b'\x07'): precompiles.ecmul,
force_bytes_to_address(b'\x08'): precompiles.ecpairing,
},
)
class ByzantiumComputation(SpuriousDragonComputation):
"""
A class for all execution computations in the ``Byzantium`` fork.
Inherits from :class:`~hvm.vm.forks.spurious_dragon.computation.SpuriousDragonComputation`
"""
# Override
opcodes = BYZANTIUM_OPCODES
_precompiles = BYZANTIUM_PRECOMPILES
