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test_create_with_reservoir()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_create.py::test_create_with_reservoir@622620d8.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_create.py::test_create_with_reservoir --fork Amsterdam

Test CREATE/CREATE2 with state gas funded from the reservoir.

The factory is forwarded only the execution gas it needs, so the new-account charge can only come from the reservoir riding along. One gas short of that grant the factory halts instead.

Source code in tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_create.py 
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@pytest.mark.with_all_create_opcodes
@pytest.mark.parametrize(
    "gas_delta",
    [pytest.param(0, id="exact_fit"), pytest.param(-1, id="one_short")],
)
@pytest.mark.valid_from("EIP8037")
def test_create_with_reservoir(
    state_test: StateTestFiller,
    pre: Alloc,
    create_opcode: Op,
    gas_delta: int,
    fork: Fork,
) -> None:
    """
    Test CREATE/CREATE2 with state gas funded from the reservoir.

    The factory is forwarded only the execution gas it needs, so the
    new-account charge can only come from the reservoir riding along.
    One gas short of that grant the factory halts instead.
    """
    init_code = Op.STOP
    mstore_value, size = init_code_at_high_bytes(init_code)

    create_call = create_opcode(
        value=0, offset=0, size=size, init_code_size=size
    )

    factory_code = Op.MSTORE(0, mstore_value, new_memory_size=32) + Op.POP(
        create_call
    )
    factory = pre.deploy_contract(code=factory_code)

    storage = Storage()
    contract = pre.deploy_contract(
        code=Op.SSTORE(
            storage.store_next(1 if gas_delta == 0 else 0, "create_succeeded"),
            Op.CALL(
                gas=factory_code.execution_cost(fork),
                address=factory,
            ),
        ),
        storage=storage.canary(),
    )

    tx = Transaction(
        to=contract,
        state_gas_reservoir=factory_code.state_cost(fork) + gas_delta,
        sender=pre.fund_eoa(),
    )

    created = compute_create_address(
        address=factory,
        nonce=1,
        salt=0,
        initcode=init_code,
        opcode=create_opcode,
    )

    post = {
        contract: Account(storage=storage),
        created: Account(nonce=1, code=b"")
        if gas_delta == 0
        else Account.NONEXISTENT,
    }
    state_test(pre=pre, post=post, tx=tx)

Parametrized Test Cases

This test generates 4 parametrized test cases across 1 fork.