test_extcodehash_new_account()

Documentation for tests/constantinople/eip1052_extcodehash/test_extcodehash.py::test_extcodehash_new_account@9c2813ee.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/constantinople/eip1052_extcodehash/test_extcodehash.py::test_extcodehash_new_account --fork Amsterdam

Test EXTCODEHASH/EXTCODESIZE of a contract created within the same tx.

Uses CREATE/CREATE2 to deploy a contract, then verifies that EXTCODEHASH and EXTCODESIZE reflect the newly deployed code.

Source code in tests/constantinople/eip1052_extcodehash/test_extcodehash.py

@pytest.mark.ported_from(
    [
        "https://github.com/ethereum/tests/blob/v13.3/src/GeneralStateTestsFiller/stExtCodeHash/extCodeHashNewAccountFiller.json",  # noqa: E501
        "https://github.com/ethereum/tests/blob/v13.3/src/GeneralStateTestsFiller/stExtCodeHash/createEmptyThenExtcodehashFiller.json",  # noqa: E501
    ],
    pr=["https://github.com/ethereum/execution-specs/pull/2326"],
)
@pytest.mark.parametrize("opcode", [Op.CREATE, Op.CREATE2])
@pytest.mark.parametrize(
    "deployed_code",
    [
        pytest.param((0x1234).to_bytes(32, "big"), id="non-empty"),
        pytest.param(b"", id="empty"),
    ],
)
def test_extcodehash_new_account(
    state_test: StateTestFiller,
    pre: Alloc,
    deployed_code: bytes,
    opcode: Opcodes,
) -> None:
    """
    Test EXTCODEHASH/EXTCODESIZE of a contract created within the same tx.

    Uses CREATE/CREATE2 to deploy a contract, then verifies that EXTCODEHASH
    and EXTCODESIZE reflect the newly deployed code.
    """
    storage = Storage()

    initcode = Op.MSTORE(
        0, int.from_bytes(deployed_code.ljust(32, b"\0"), "big")
    ) + Op.RETURN(0, len(deployed_code))

    created_slot = storage.store_next(0)
    hash_slot = storage.store_next(keccak256(deployed_code))
    size_slot = storage.store_next(len(deployed_code))

    code = (
        Op.MSTORE(0, Op.PUSH32(bytes(initcode).ljust(32, b"\0")))
        + Op.SSTORE(
            created_slot,
            opcode(value=0, offset=0, size=len(initcode)),
        )
        + Op.SSTORE(hash_slot, Op.EXTCODEHASH(Op.SLOAD(created_slot)))
        + Op.SSTORE(size_slot, Op.EXTCODESIZE(Op.SLOAD(created_slot)))
        + Op.STOP
    )

    code_address = pre.deploy_contract(code, storage=storage.canary())
    created_address = compute_create_address(
        address=code_address,
        nonce=1,
        salt=0,
        initcode=initcode,
        opcode=opcode,
    )
    storage[created_slot] = created_address

    tx = Transaction(
        sender=pre.fund_eoa(),
        to=code_address,
        gas_limit=400_000,
    )

    state_test(
        pre=pre,
        post={
            code_address: Account(storage=storage),
            created_address: Account(nonce=1, code=deployed_code),
        },
        tx=tx,
    )

Parametrized Test Cases

This test generates 4 parametrized test cases across 10 forks.