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test_blob_type_tx_pre_fork()

Documentation for tests/cancun/eip4844_blobs/test_blob_txs.py::test_blob_type_tx_pre_fork@3719e927.

Generate fixtures for these test cases for Prague with:

fill -v tests/cancun/eip4844_blobs/test_blob_txs.py::test_blob_type_tx_pre_fork --fork Prague

Reject blocks with blob type transactions before Cancun fork.

Blocks sent by NewPayloadV2 (Shanghai) that contain blob type transactions, furthermore blobs field within NewPayloadV2 method must be computed as INVALID, due to an invalid block hash.

Source code in tests/cancun/eip4844_blobs/test_blob_txs.py 
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@pytest.mark.parametrize(
    [
        "blobs_per_tx",
        "parent_excess_blobs",
        "tx_max_fee_per_blob_gas",
        "tx_error",
        "block_error",
    ],
    [
        (
            [0],
            None,
            1,
            [TransactionException.TYPE_3_TX_PRE_FORK, TransactionException.TYPE_3_TX_ZERO_BLOBS],
            [TransactionException.TYPE_3_TX_PRE_FORK, TransactionException.TYPE_3_TX_ZERO_BLOBS],
        ),
        (
            [1],
            None,
            1,
            TransactionException.TYPE_3_TX_PRE_FORK,
            [TransactionException.TYPE_3_TX_PRE_FORK, BlockException.INVALID_VERSIONED_HASHES],
        ),
    ],
    ids=["no_blob_tx", "one_blob_tx"],
)
@pytest.mark.exception_test
@pytest.mark.valid_at_transition_to("Cancun")
def test_blob_type_tx_pre_fork(
    state_test: StateTestFiller,
    pre: Alloc,
    txs: List[Transaction],
    block_error: Optional[TransactionException | BlockException],
):
    """
    Reject blocks with blob type transactions before Cancun fork.

    Blocks sent by NewPayloadV2 (Shanghai) that contain blob type transactions, furthermore blobs
    field within NewPayloadV2 method must be computed as INVALID, due to an invalid block hash.
    """
    assert len(txs) == 1
    state_test(
        pre=pre,
        post={},
        tx=txs[0],
        env=Environment(),  # `env` fixture has blob fields
        block_exception=block_error,
    )

Parametrized Test Cases

This test case is only parametrized by fork and fixture format.

Test ID (Abbreviated) blobs_per_tx parent_excess_blobs tx_max_fee_per_blob_gas tx_error block_error
...fork_Shanghai-state_test-no_blob_tx [0] None 1 [, ] [, ]
...fork_Shanghai-state_test-one_blob_tx [1] None 1 TransactionException.TYPE_3_TX_PRE_FORK [, ]
...fork_ShanghaiToCancunAtTime15k-blockchain_test_from_state_test-no_blob_tx [0] None 1 [, ] [, ]
...fork_ShanghaiToCancunAtTime15k-blockchain_test_from_state_test-one_blob_tx [1] None 1 TransactionException.TYPE_3_TX_PRE_FORK [, ]