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new(tests): Add generic precompile-absence test (#1036)
* new(tests): Add precompile-absence test * more parametrize * fix(tests): Use zero gas to guarantee failure in case of unexpected precompile * docs: Changelog * fix: ruff
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"""Test for precompiles that apply for all forks starting from Frontier.""" |
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"""abstract: Test Calling Precompile Range (close to zero).""" | ||
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import pytest | ||
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from ethereum_test_forks import Fork | ||
from ethereum_test_tools import ( | ||
Account, | ||
Address, | ||
Alloc, | ||
Bytecode, | ||
StateTestFiller, | ||
Storage, | ||
Transaction, | ||
) | ||
from ethereum_test_tools import Opcodes as Op | ||
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UPPER_BOUND = 0x101 | ||
RETURNDATASIZE_OFFSET = 0x10000000000000000 # Must be greater than UPPER_BOUND | ||
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@pytest.mark.parametrize( | ||
"calldata_size", | ||
[ | ||
pytest.param(0, id="empty_calldata"), | ||
pytest.param(31, id="31_bytes"), | ||
pytest.param(32, id="32_bytes"), | ||
], | ||
) | ||
@pytest.mark.valid_from("Byzantium") | ||
def test_precompile_absence( | ||
state_test: StateTestFiller, | ||
pre: Alloc, | ||
fork: Fork, | ||
calldata_size: int, | ||
): | ||
"""Test that addresses close to zero are not precompiles unless active in the fork.""" | ||
active_precompiles = fork.precompiles() | ||
storage = Storage() | ||
call_code = Bytecode() | ||
for address in range(1, UPPER_BOUND + 1): | ||
if Address(address) in active_precompiles: | ||
continue | ||
call_code += Op.SSTORE( | ||
address, | ||
Op.CALL(gas=0, address=address, args_size=calldata_size), | ||
) | ||
storage[address] = 1 | ||
if Op.RETURNDATASIZE in fork.valid_opcodes(): | ||
call_code += Op.SSTORE( | ||
address + RETURNDATASIZE_OFFSET, | ||
Op.RETURNDATASIZE, | ||
) | ||
storage[address + RETURNDATASIZE_OFFSET] = 0 | ||
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call_code += Op.STOP | ||
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entry_point_address = pre.deploy_contract(call_code, storage=storage.canary()) | ||
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tx = Transaction( | ||
to=entry_point_address, | ||
gas_limit=10_000_000, | ||
sender=pre.fund_eoa(), | ||
protected=True, | ||
) | ||
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state_test( | ||
pre=pre, | ||
tx=tx, | ||
post={ | ||
entry_point_address: Account( | ||
storage=storage, | ||
) | ||
}, | ||
) |