`test_blobhash_invalid_blob_index()`¶

Documentation for tests/cancun/eip4844_blobs/test_blobhash_opcode.py::test_blobhash_invalid_blob_index@dfdd4336.

Generate fixtures for these test cases for Prague with:

fill -v tests/cancun/eip4844_blobs/test_blobhash_opcode.py::test_blobhash_invalid_blob_index --fork Prague

Tests that the BLOBHASH opcode returns a zeroed bytes32 value for invalid indexes.

Includes cases where the index is negative (index < 0) or exceeds the maximum number of blob_versioned_hash values stored: (index >= len(tx.message.blob_versioned_hashes)).

It confirms that the returned value is a zeroed bytes32 for each case.

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

@pytest.mark.parametrize(
    "scenario",
    [
        "invalid_calls",
    ],
)
def test_blobhash_invalid_blob_index(
    pre: Alloc,
    fork: Fork,
    blockchain_test: BlockchainTestFiller,
    scenario: str,
    max_blobs_per_block: int,
):
    """
    Tests that the `BLOBHASH` opcode returns a zeroed `bytes32` value for invalid
    indexes.

    Includes cases where the index is negative (`index < 0`) or
    exceeds the maximum number of `blob_versioned_hash` values stored:
    (`index >= len(tx.message.blob_versioned_hashes)`).

    It confirms that the returned value is a zeroed `bytes32` for each case.
    """
    total_blocks = 5
    blobhash_calls = BlobhashScenario.generate_blobhash_bytecode(
        scenario_name=scenario, max_blobs_per_block=max_blobs_per_block
    )
    sender = pre.fund_eoa()
    blocks: List[Block] = []
    post = {}
    for i in range(total_blocks):
        address = pre.deploy_contract(blobhash_calls)
        blob_per_block = (i % max_blobs_per_block) + 1
        blobs = [random_blob_hashes[blob] for blob in range(blob_per_block)]
        blocks.append(
            Block(
                txs=[
                    Transaction(
                        ty=Spec.BLOB_TX_TYPE,
                        sender=sender,
                        to=address,
                        gas_limit=500_000,
                        data=Hash(0),
                        access_list=[],
                        max_fee_per_blob_gas=(fork.min_base_fee_per_blob_gas() * 10),
                        blob_versioned_hashes=blobs,
                    )
                ]
            )
        )
        post[address] = Account(
            storage={
                index: (0 if index < 0 or index >= blob_per_block else blobs[index])
                for index in range(
                    -total_blocks,
                    blob_per_block + (total_blocks - (i % max_blobs_per_block)),
                )
            }
        )
    blockchain_test(
        pre=pre,
        blocks=blocks,
        post=post,
    )

Parametrized Test Cases¶

This test case is only parametrized by fork.

Test ID (Abbreviated)	scenario
...fork_Cancun-blockchain_test-scenario_invalid_calls	invalid_calls
...fork_Prague-blockchain_test-scenario_invalid_calls	invalid_calls
...fork_Osaka-blockchain_test-scenario_invalid_calls	invalid_calls

test_blobhash_invalid_blob_index()¶

Parametrized Test Cases¶

`test_blobhash_invalid_blob_index()`¶