test_creation_tx_failure_preserves_intrinsic_state_gas()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_reservoir.py::test_creation_tx_failure_preserves_intrinsic_state_gas@2119b382.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_reservoir.py::test_creation_tx_failure_preserves_intrinsic_state_gas --fork Amsterdam

Regression test for the creation tx failure path.

A creation tx (to=None) whose initcode halts exercises both the intrinsic state gas for the new account and the top level failure refund of execution state gas. The test asserts the block header gas_used equals max(block_regular, intrinsic_state_gas), guarding that the failure path does not raise and that block accounting does not underflow when the refund is applied.

Source code in tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_reservoir.py

@pytest.mark.valid_from("EIP8037")
def test_creation_tx_failure_preserves_intrinsic_state_gas(
    blockchain_test: BlockchainTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Regression test for the creation tx failure path.

    A creation tx (to=None) whose initcode halts exercises both the
    intrinsic state gas for the new account and the top level failure
    refund of execution state gas. The test asserts the block header
    `gas_used` equals `max(block_regular, intrinsic_state_gas)`,
    guarding that the failure path does not raise and that block
    accounting does not underflow when the refund is applied.
    """
    gas_limit_cap = fork.transaction_gas_limit_cap()
    assert gas_limit_cap is not None

    create_intrinsic_state = fork.transaction_top_frame_state_gas(
        contract_creation=True,
    )
    sstore_state_gas = Op.SSTORE(new_value=1).state_cost(fork)
    tx_gas = gas_limit_cap + create_intrinsic_state + sstore_state_gas

    tx = Transaction(
        to=None,
        data=Op.SSTORE(0, 1) + Op.INVALID,
        state_gas_reservoir=create_intrinsic_state + sstore_state_gas,
        sender=pre.fund_eoa(),
    )

    block_regular = tx_gas - create_intrinsic_state - sstore_state_gas
    expected_gas_used = max(block_regular, create_intrinsic_state)

    blockchain_test(
        pre=pre,
        blocks=[
            Block(
                txs=[tx],
                header_verify=Header(gas_used=expected_gas_used),
            ),
        ],
        post={},
    )

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.