test_bal_fully_unmutated_account()

Documentation for tests/amsterdam/eip7928_block_level_access_lists/test_block_access_lists.py::test_bal_fully_unmutated_account@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_fully_unmutated_account --fork Amsterdam

Test that BAL captures account that has zero net mutations.

oracle account

1. Storage read and write the same value (no net change).
2. Receives 0 value transfer (no net change).

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

def test_bal_fully_unmutated_account(
    pre: Alloc,
    blockchain_test: BlockchainTestFiller,
) -> None:
    """
    Test that BAL captures account that has zero net mutations.

    oracle account:
        1. Storage read and write the same value (no net change).
        2. Receives `0` value transfer (no net change).
    """
    alice = pre.fund_eoa()
    # Deploy Oracle contract with pre-existing storage value
    oracle = pre.deploy_contract(
        code=Op.SSTORE(0x01, 0x42) + Op.STOP,
        storage={0x01: 0x42},  # Pre-existing value
    )

    tx = Transaction(
        sender=alice, to=oracle, gas_limit=1_000_000, value=0, gas_price=0xA
    )

    block = Block(
        txs=[tx],
        expected_block_access_list=BlockAccessListExpectation(
            account_expectations={
                alice: BalAccountExpectation(
                    nonce_changes=[
                        BalNonceChange(block_access_index=1, post_nonce=1)
                    ],
                ),
                oracle: BalAccountExpectation(
                    storage_changes=[],  # No net storage changes
                    storage_reads=[0x01],  # But storage was accessed
                    balance_changes=[],  # No net balance changes
                ),
            }
        ),
    )

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

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.