test_invalid_excess_blob_gas_above_target_change()

Documentation for tests/cancun/eip4844_blobs/test_excess_blob_gas.py::test_invalid_excess_blob_gas_above_target_change@verkle@v0.0.6.

Generate fixtures for these test cases for Cancun with:

Cancun only:

fill -v tests/cancun/eip4844_blobs/test_excess_blob_gas.py::test_invalid_excess_blob_gas_above_target_change --fork=Cancun --evm-bin=/path/to/evm-tool-dev-version

For all forks up to and including Cancun:

fill -v tests/cancun/eip4844_blobs/test_excess_blob_gas.py::test_invalid_excess_blob_gas_above_target_change --until=Cancun

Test rejection of blocks where the excessBlobGas

• decreases more than TARGET_BLOB_GAS_PER_BLOCK in a single block with zero blobs
• increases more than TARGET_BLOB_GAS_PER_BLOCK in a single block with max blobs

Source code in tests/cancun/eip4844_blobs/test_excess_blob_gas.py

@pytest.mark.parametrize(
    "header_excess_blobs_delta,parent_blobs",
    [
        (-1, 0),
        (+1, SpecHelpers.max_blobs_per_block()),
    ],
    ids=["zero_blobs_decrease_more_than_expected", "max_blobs_increase_more_than_expected"],
)
@pytest.mark.parametrize("new_blobs", [1])
def test_invalid_excess_blob_gas_above_target_change(
    blockchain_test: BlockchainTestFiller,
    env: Environment,
    pre: Mapping[Address, Account],
    blocks: List[Block],
    correct_excess_blob_gas: int,
    header_excess_blob_gas: Optional[int],
):
    """
    Test rejection of blocks where the `excessBlobGas`

    - decreases more than `TARGET_BLOB_GAS_PER_BLOCK` in a single block with zero blobs
    - increases more than `TARGET_BLOB_GAS_PER_BLOCK` in a single block with max blobs
    """
    if header_excess_blob_gas is None:
        raise Exception("test case is badly formatted")

    if header_excess_blob_gas == correct_excess_blob_gas:
        raise Exception("invalid test case")

    blockchain_test(
        pre=pre,
        post={},
        blocks=blocks,
        genesis_environment=env,
        tag="-".join(
            [
                f"correct:{hex(correct_excess_blob_gas)}",
                f"header:{hex(header_excess_blob_gas)}",
            ]
        ),
    )

Parametrized Test Cases

The interactive table below is also available as a standalone page.

Skipped Parameters

For more concise readability, the table below does not list the following parameter values: fork, blockchain_test, state_test, state_test_only, eof_test, eof_state_test.

Test ID	new_blobs	header_excess_blobs_delta	parent_blobs
new_blobs_1-zero_blobs_decrease_more_than_expected	1	-1	0
new_blobs_1-max_blobs_increase_more_than_expected	1	1	6