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test_reservoir_returned_on_revert()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_call.py::test_reservoir_returned_on_revert@5c024cbb.

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_reservoir_returned_on_revert --fork Amsterdam

Test state gas reservoir is returned to parent on child revert.

The child contract reverts. The parent should recover the reservoir and be able to use it for its own SSTORE.

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_reservoir_returned_on_revert(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Test state gas reservoir is returned to parent on child revert.

    The child contract reverts. The parent should recover the
    reservoir and be able to use it for its own SSTORE.
    """
    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=(
            # Call child that reverts (returns 0)
            Op.POP(Op.CALL(gas=100_000, address=child))
            # Parent can still use reservoir for its own SSTORE
            + Op.SSTORE(parent_storage.store_next(1), 1)
        ),
    )

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

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

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.