test_tx_entry_point()

Documentation for tests/cancun/eip4844_blobs/test_point_evaluation_precompile.py::test_tx_entry_point@b314d18e.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/cancun/eip4844_blobs/test_point_evaluation_precompile.py::test_tx_entry_point --fork Amsterdam

Test calling the Point Evaluation Precompile directly as transaction entry point, and measure the gas consumption.

• Using gas_limit with exact necessary gas, insufficient gas and extra gas.
• Using correct and incorrect proofs

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

@pytest.mark.parametrize(
    "call_gas",
    [
        (Spec.POINT_EVALUATION_PRECOMPILE_GAS),
        (Spec.POINT_EVALUATION_PRECOMPILE_GAS + 1),
        (Spec.POINT_EVALUATION_PRECOMPILE_GAS - 1),
    ],
    ids=["exact_gas", "extra_gas", "insufficient_gas"],
)
@pytest.mark.parametrize(
    "z,y,kzg_commitment,kzg_proof,versioned_hash,proof_correct",
    [
        [Z, 0, INF_POINT, INF_POINT, None, True],
        [Z, 1, INF_POINT, INF_POINT, None, False],
    ],
    ids=["correct_proof", "incorrect_proof"],
)
@pytest.mark.valid_from("Cancun")
def test_tx_entry_point(
    fork: Fork,
    state_test: StateTestFiller,
    precompile_input: bytes,
    call_gas: int,
    pre: Alloc,
    proof_correct: bool,
) -> None:
    """
    Test calling the Point Evaluation Precompile directly as transaction entry
    point, and measure the gas consumption.

    - Using `gas_limit` with exact necessary gas, insufficient gas and extra
        gas.
    - Using correct and incorrect proofs
    """
    sender = pre.fund_eoa()

    # Starting from EIP-7623, we need to use an access list to raise the
    # intrinsic gas cost to be above the floor data cost.
    access_list = [
        AccessList(address=Address(i), storage_keys=[]) for i in range(1, 10)
    ]

    # Gas is appended the intrinsic gas cost of the transaction
    tx_intrinsic_gas_cost_calculator = (
        fork.transaction_intrinsic_cost_calculator()
    )
    intrinsic_gas_cost = tx_intrinsic_gas_cost_calculator(
        calldata=precompile_input, access_list=access_list
    )

    # Consumed gas will only be the precompile gas if the proof is correct and
    # the call gas is sufficient.
    # Otherwise, the call gas will be consumed in full.
    precompile_gas = fork.gas_costs().PRECOMPILE_POINT_EVALUATION
    consumed_gas = (
        precompile_gas
        if call_gas >= precompile_gas and proof_correct
        else call_gas
    ) + tx_intrinsic_gas_cost_calculator(
        calldata=precompile_input,
        access_list=access_list,
        return_cost_deducted_prior_execution=True,
    )

    tx = Transaction(
        sender=sender,
        data=precompile_input,
        access_list=access_list,
        to=Address(Spec.POINT_EVALUATION_PRECOMPILE_ADDRESS),
        gas_limit=call_gas + intrinsic_gas_cost,
        expected_receipt=TransactionReceipt(cumulative_gas_used=consumed_gas),
    )

    post = {
        sender: Account(
            nonce=1,
        )
    }

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

Parametrized Test Cases

This test generates 6 parametrized test cases across 4 forks.