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test_child_call_uses_reservoir()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_call.py::test_child_call_uses_reservoir@2119b382.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_call.py::test_child_call_uses_reservoir --fork Amsterdam

Test child call can use parent's state gas reservoir.

The parent calls a child contract that performs an SSTORE (zero-to-nonzero). The state gas for the SSTORE is drawn from the reservoir passed from the parent.

Source code in tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_call.py 
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@pytest.mark.valid_from("EIP8037")
def test_child_call_uses_reservoir(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Test child call can use parent's state gas reservoir.

    The parent calls a child contract that performs an SSTORE
    (zero-to-nonzero). The state gas for the SSTORE is drawn from
    the reservoir passed from the parent.
    """
    sstore_state_gas = Op.SSTORE(new_value=1).state_cost(fork)

    child_storage = Storage()
    child = pre.deploy_contract(
        code=Op.SSTORE(child_storage.store_next(1), 1),
    )

    parent_storage = Storage()
    parent = pre.deploy_contract(
        code=(
            Op.SSTORE(
                parent_storage.store_next(1),
                Op.CALL(gas=100_000, address=child),
            )
        ),
    )

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

    post = {
        parent: Account(storage=parent_storage),
        child: Account(storage=child_storage),
    }
    state_test(pre=pre, post=post, tx=tx)

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.