test_blobhash_gas_cost()

Documentation for tests/cancun/eip4844_blobs/test_blobhash_opcode.py::test_blobhash_gas_cost@7b8124a7.

Generate fixtures for these test cases for Osaka with:

fill -v tests/cancun/eip4844_blobs/test_blobhash_opcode.py::test_blobhash_gas_cost --fork Osaka

Tests BLOBHASH opcode gas cost using a variety of indexes.

Asserts that the gas consumption of the BLOBHASH opcode is correct by ensuring it matches HASH_OPCODE_GAS = 3. Includes both valid and invalid random index sizes from the range [0, 2**256-1], for tx types 2 and 3.

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

@pytest.mark.parametrize("blobhash_index", blobhash_index_values)
@pytest.mark.with_all_tx_types
def test_blobhash_gas_cost(
    pre: Alloc,
    fork: Fork,
    tx_type: int,
    blobhash_index: int,
    state_test: StateTestFiller,
) -> None:
    """
    Tests `BLOBHASH` opcode gas cost using a variety of indexes.

    Asserts that the gas consumption of the `BLOBHASH` opcode is correct by
    ensuring it matches `HASH_OPCODE_GAS = 3`. Includes both valid and invalid
    random index sizes from the range `[0, 2**256-1]`, for tx types 2 and 3.
    """
    blobhash_code = Op.BLOBHASH(blobhash_index)
    gas_measure_code = CodeGasMeasure(
        code=blobhash_code,
        extra_stack_items=1,
    )

    address = pre.deploy_contract(gas_measure_code)
    sender = pre.fund_eoa()

    tx_kwargs = {
        "ty": tx_type,
        "sender": sender,
        "to": address,
        "data": Hash(0),
        "gas_limit": 500_000,
        "max_fee_per_blob_gas": (fork.min_base_fee_per_blob_gas() * 10)
        if tx_type == 3
        else None,
        "blob_versioned_hashes": random_blob_hashes[
            0 : fork.max_blobs_per_tx()
        ]
        if tx_type == 3
        else None,
    }
    if tx_type == 4:
        signer = pre.fund_eoa(amount=0)
        tx_kwargs["authorization_list"] = [
            AuthorizationTuple(
                signer=signer,
                address=Address(0),
                nonce=0,
            )
        ]

    tx = Transaction(**tx_kwargs)
    post = {address: Account(storage={0: blobhash_code.gas_cost(fork)})}

    state_test(
        env=Environment(),
        pre=pre,
        tx=tx,
        post=post,
    )

Parametrized Test Cases

This test generates 35 parametrized test cases across 3 forks.