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test_account_warm_status_reverted_by_subcall()

Documentation for tests/berlin/eip2929_gas_cost_increases/test_warm_status_revert.py::test_account_warm_status_reverted_by_subcall@9c2813ee.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/berlin/eip2929_gas_cost_increases/test_warm_status_revert.py::test_account_warm_status_reverted_by_subcall --fork Amsterdam

Test that account warm status is reverted when a sub-call reverts.

Inner call does BALANCE(target) then REVERTs. After revert, BALANCE(target) in the outer call must be a cold access.

Source code in tests/berlin/eip2929_gas_cost_increases/test_warm_status_revert.py 
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@pytest.mark.valid_from("Berlin")
def test_account_warm_status_reverted_by_subcall(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Test that account warm status is reverted when a sub-call reverts.

    Inner call does BALANCE(target) then REVERTs. After revert,
    BALANCE(target) in the outer call must be a cold access.
    """
    env = Environment()

    target = pre.fund_eoa(amount=1)

    # Inner: BALANCE(target) warms target, then reverts.
    inner = pre.deploy_contract(
        Op.POP(Op.BALANCE(target)) + Op.REVERT(offset=0, size=0)
    )

    # Overhead: PUSH for the BALANCE address argument.
    balance_push_cost = (Op.PUSH1(0) * len(Op.BALANCE.kwargs)).gas_cost(fork)
    cold_balance_cost = Op.BALANCE(address_warm=False).gas_cost(fork)

    # Outer: call inner (reverts), then measure BALANCE(target) gas.
    outer = pre.deploy_contract(
        Op.POP(Op.CALL(gas=100_000, address=inner))
        + CodeGasMeasure(
            code=Op.BALANCE(target),
            overhead_cost=balance_push_cost,
            extra_stack_items=1,
            sstore_key=0,
        )
    )

    sender = pre.fund_eoa()

    state_test(
        env=env,
        pre=pre,
        post={outer: Account(storage={0: cold_balance_cost})},
        tx=Transaction(
            sender=sender,
            to=outer,
            gas_limit=1_000_000,
        ),
    )

Parametrized Test Cases

This test generates 1 parametrized test case across 8 forks.