test_charge_spill_boundary()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_pricing.py::test_charge_spill_boundary@c74f1a67.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_pricing.py::test_charge_spill_boundary --fork Amsterdam

Test the SSTORE-set state charge at its exact-fit spill boundary.

With an empty reservoir (in-cap tx) the full state charge spills into gas_left. Sized to exactly the charge the SSTORE succeeds and the block bills it as state gas; one gas short, neither pool can cover the charge and the frame runs out of gas with the slot unset.

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

@pytest.mark.parametrize(
    "gas_delta",
    [pytest.param(0, id="exact_fit"), pytest.param(-1, id="one_short")],
)
@EIPChecklist.GasCostChanges.Test.OutOfGas()
@pytest.mark.valid_from("EIP8037")
def test_charge_spill_boundary(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
    gas_delta: int,
) -> None:
    """
    Test the SSTORE-set state charge at its exact-fit spill boundary.

    With an empty reservoir (in-cap tx) the full state charge spills
    into gas_left. Sized to exactly the charge the SSTORE succeeds and
    the block bills it as state gas; one gas short, neither pool can
    cover the charge and the frame runs out of gas with the slot unset.
    """
    code = Op.SSTORE(0, 1)
    contract = pre.deploy_contract(code=code)

    intrinsic = fork.transaction_intrinsic_cost_calculator()()
    regular = code.regular_cost(fork)
    sstore_state_gas = Op.SSTORE(new_value=1).state_cost(fork)
    gas_limit = intrinsic + regular + sstore_state_gas + gas_delta

    tx = Transaction(
        to=contract,
        gas_limit=gas_limit,
        sender=pre.fund_eoa(),
    )

    header = Header(
        gas_used=max(intrinsic + regular, sstore_state_gas)
        if gas_delta == 0
        else gas_limit
    )
    state_test(
        pre=pre,
        post={contract: Account(storage={0: 1 if gas_delta == 0 else 0})},
        tx=tx,
        blockchain_test_header_verify=header,
    )

Parametrized Test Cases

This test generates 2 parametrized test cases across 1 fork.