test_calldata_floor_binds_with_reservoir()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_calldata_floor.py::test_calldata_floor_binds_with_reservoir@c74f1a67.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_calldata_floor.py::test_calldata_floor_binds_with_reservoir --fork Amsterdam

Bind the calldata floor while an over-cap reservoir funds state gas.

Large calldata makes the EIP-7976 floor the sender's bill, while an over-cap gas_limit puts the SSTORE-set state charge in the reservoir. The floor binds the receipt and the block's regular dimension alike, so the header gas_used is the floor (not the state dimension).

Source code in tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_calldata_floor.py

@pytest.mark.valid_from("EIP8037")
def test_calldata_floor_binds_with_reservoir(
    state_test: StateTestFiller,
    pre: Alloc,
    fork: Fork,
) -> None:
    """
    Bind the calldata floor while an over-cap reservoir funds state gas.

    Large calldata makes the EIP-7976 floor the sender's bill, while an
    over-cap `gas_limit` puts the SSTORE-set state charge in the
    reservoir. The floor binds the receipt and the block's regular
    dimension alike, so the header gas_used is the floor (not the
    state dimension).
    """
    storage = Storage()
    code = Op.SSTORE(storage.store_next(1), 1, new_value=1)
    state_cost = code.state_cost(fork)
    regular_cost = code.regular_cost(fork)

    # Sized so the floor binds while block-regular stays under storage_set.
    calldata = b"\x00" * 5000
    floor = fork.transaction_data_floor_cost_calculator()(data=calldata)
    intrinsic = fork.transaction_intrinsic_cost_calculator()(
        calldata=calldata,
        return_cost_deducted_prior_execution=True,
    )
    tx_regular = intrinsic + regular_cost
    assert floor > tx_regular + state_cost, (
        "calldata floor must exceed the sender's pre-floor bill"
    )
    assert tx_regular < state_cost, (
        "block-regular must stay under the state dimension"
    )

    contract = pre.deploy_contract(code=code)

    tx = Transaction(
        to=contract,
        data=calldata,
        state_gas_reservoir=state_cost,
        sender=pre.fund_eoa(),
        expected_receipt=TransactionReceipt(cumulative_gas_used=floor),
    )
    state_test(
        pre=pre,
        post={contract: Account(storage=storage)},
        tx=tx,
        blockchain_test_header_verify=Header(gas_used=floor),
    )

Parametrized Test Cases

This test generates 1 parametrized test case across 1 fork.