test_bal_delegatecall_no_delegation_and_oog_before_target_access()

Documentation for tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists_opcodes.py::test_bal_delegatecall_no_delegation_and_oog_before_target_access@c74f1a67.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists_opcodes.py::test_bal_delegatecall_no_delegation_and_oog_before_target_access --fork Amsterdam

DELEGATECALL without 7702 delegation - test SUCCESS and OOG boundaries.

When target_is_warm=True, we use EIP-2930 tx access list to warm the target. Access list warming does NOT add to BAL - only EVM access does.

Memory expansion is parametrized independently for args and ret per #1910.

Source code in tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists_opcodes.py

@pytest.mark.parametrize(
    "oog_boundary",
    [OutOfGasBoundary.SUCCESS, OutOfGasBoundary.OOG_BEFORE_TARGET_ACCESS],
    ids=lambda x: x.value,
)
@pytest.mark.parametrize(
    "target_is_warm", [False, True], ids=["cold_target", "warm_target"]
)
@pytest.mark.parametrize(
    "args_size,ret_size",
    [
        pytest.param(0, 0, id="no_memory"),
        pytest.param(4096, 0, id="args_large"),
        pytest.param(0, 4096, id="ret_large"),
        pytest.param(32, 32, id="both_small"),
    ],
)
def test_bal_delegatecall_no_delegation_and_oog_before_target_access(
    pre: Alloc,
    blockchain_test: BlockchainTestFiller,
    fork: Fork,
    oog_boundary: OutOfGasBoundary,
    target_is_warm: bool,
    args_size: int,
    ret_size: int,
) -> None:
    """
    DELEGATECALL without 7702 delegation - test SUCCESS and OOG boundaries.

    When target_is_warm=True, we use EIP-2930 tx access list to warm the
    target. Access list warming does NOT add to BAL - only EVM access does.

    Memory expansion is parametrized independently for args and ret per #1910.
    """
    alice = pre.fund_eoa()

    target = pre.deploy_contract(code=Op.STOP)

    new_memory_size = max(args_size, ret_size)

    delegatecall_code = Op.DELEGATECALL(
        address=target,
        gas=0,
        args_size=args_size,
        args_offset=0,
        ret_size=ret_size,
        ret_offset=0,
        address_warm=target_is_warm,
        new_memory_size=new_memory_size,
    )

    caller = pre.deploy_contract(code=delegatecall_code)

    access_list = (
        [AccessList(address=target, storage_keys=[])]
        if target_is_warm
        else None
    )

    intrinsic_cost = fork.transaction_intrinsic_cost_calculator()(
        access_list=access_list
    )

    if oog_boundary == OutOfGasBoundary.OOG_BEFORE_TARGET_ACCESS:
        gas_limit = intrinsic_cost + delegatecall_code.gas_cost(fork) - 1
    else:  # SUCCESS
        gas_limit = intrinsic_cost + delegatecall_code.gas_cost(fork)

    tx = Transaction(
        sender=alice,
        to=caller,
        gas_limit=gas_limit,
        access_list=access_list,
    )

    # BAL expectations
    account_expectations: Dict[Address, BalAccountExpectation | None]
    if oog_boundary == OutOfGasBoundary.OOG_BEFORE_TARGET_ACCESS:
        # Target NOT in BAL - we OOG before state access
        account_expectations = {
            caller: BalAccountExpectation.empty(),
            target: None,
        }
    else:  # SUCCESS - target in BAL
        account_expectations = {
            caller: BalAccountExpectation.empty(),
            target: BalAccountExpectation.empty(),
        }

    blockchain_test(
        pre=pre,
        blocks=[
            Block(
                txs=[tx],
                expected_block_access_list=BlockAccessListExpectation(
                    account_expectations=account_expectations
                ),
            )
        ],
        post={alice: Account(nonce=1)},
    )

Parametrized Test Cases

This test generates 16 parametrized test cases across 1 fork.