test_bal_delegated_storage_reads()

Documentation for tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists.py::test_bal_delegated_storage_reads@20373115.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists.py::test_bal_delegated_storage_reads --fork Amsterdam

Ensure BAL captures delegated storage reads via DELEGATECALL and CALLCODE.

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

@pytest.mark.parametrize(
    "delegated_opcode",
    [
        pytest.param(
            lambda target_addr: Op.DELEGATECALL(
                50000, target_addr, 0, 0, 0, 0
            ),
            id="delegatecall",
        ),
        pytest.param(
            lambda target_addr: Op.CALLCODE(50000, target_addr, 0, 0, 0, 0, 0),
            id="callcode",
        ),
    ],
)
def test_bal_delegated_storage_reads(
    pre: Alloc,
    blockchain_test: BlockchainTestFiller,
    delegated_opcode: Callable[[Address], Op],
) -> None:
    """
    Ensure BAL captures delegated storage reads via
    DELEGATECALL and CALLCODE.
    """
    alice = pre.fund_eoa()

    # TargetContract that reads from slot 0x01
    target_code = Op.SLOAD(0x01) + Op.STOP
    target_contract = pre.deploy_contract(code=target_code)

    # Oracle contract with storage slot 0x01 = 0x42,
    # uses delegated opcode to execute TargetContract's code
    oracle_code = delegated_opcode(target_contract)
    oracle_contract = pre.deploy_contract(
        code=oracle_code, storage={0x01: 0x42}
    )

    tx = Transaction(
        sender=alice,
        to=oracle_contract,
        gas_limit=1_000_000,
    )

    block = Block(
        txs=[tx],
        expected_block_access_list=BlockAccessListExpectation(
            account_expectations={
                alice: BalAccountExpectation(
                    nonce_changes=[
                        BalNonceChange(block_access_index=1, post_nonce=1)
                    ],
                ),
                oracle_contract: BalAccountExpectation(
                    storage_reads=[0x01],
                ),
                target_contract: BalAccountExpectation.empty(),
            }
        ),
    )

    blockchain_test(pre=pre, blocks=[block], post={})

Parametrized Test Cases

This test generates 2 parametrized test cases across 1 fork.