test_subcall_failure_does_not_zero_top_level_state_gas()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_reservoir.py::test_subcall_failure_does_not_zero_top_level_state_gas@622620d8.

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_subcall_failure_does_not_zero_top_level_state_gas --fork Amsterdam

Verify a subcall failure does not zero the top level execution state gas.

The top level tx succeeds end to end even though a subcall reverts, so the top level failure refund does not apply. The parent's own SSTORE contributes state gas that appears in block_state_gas_used.

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

@pytest.mark.valid_from("EIP8037")
def test_subcall_failure_does_not_zero_top_level_state_gas(
    blockchain_test: BlockchainTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Verify a subcall failure does not zero the top level execution
    state gas.

    The top level tx succeeds end to end even though a subcall
    reverts, so the top level failure refund does not apply. The
    parent's own SSTORE contributes state gas that appears in
    `block_state_gas_used`.
    """
    sstore_state_gas = Op.SSTORE(new_value=1).state_cost(fork)

    child = pre.deploy_contract(code=Op.REVERT(0, 0))
    parent_storage = Storage()
    parent = pre.deploy_contract(
        code=(
            Op.POP(Op.CALL(gas=Op.GAS, address=child))
            + Op.SSTORE(parent_storage.store_next(1, "parent_sstore"), 1)
        ),
    )

    tx = Transaction(
        to=parent,
        state_gas_reservoir=sstore_state_gas,
        sender=pre.fund_eoa(),
    )

    # Parent's SSTORE state gas dominates tx_execution and surfaces in
    # the block header, proving the top level refund is scoped to
    # top level failures and not child reverts.
    blockchain_test(
        pre=pre,
        blocks=[
            Block(
                txs=[tx],
                header_verify=Header(gas_used=sstore_state_gas),
            ),
        ],
        post={parent: Account(storage=parent_storage)},
    )

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.