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test_token_calculation_verification()

Documentation for tests/amsterdam/eip7976_increase_calldata_floor_cost/test_additional_coverage.py::TestTokenCalculation::test_token_calculation_verification@87aba1a3.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip7976_increase_calldata_floor_cost/test_additional_coverage.py::TestTokenCalculation::test_token_calculation_verification --fork Amsterdam

Test token calculation with different byte compositions.

Source code in tests/amsterdam/eip7976_increase_calldata_floor_cost/test_additional_coverage.py 
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class TestTokenCalculation:
    """Test token calculation with different byte compositions."""

    @pytest.fixture
    def sender(self, pre: Alloc) -> Address:
        """Create sender account."""
        return pre.fund_eoa()

    @pytest.fixture
    def to(self, pre: Alloc) -> Address:
        """Deploy a simple contract that does nothing."""
        return pre.deploy_contract(Op.STOP)

    @pytest.mark.parametrize(
        "calldata,expected_standard_tokens,description",
        [
            pytest.param(
                Bytes(b"\x00" * 100),
                100,
                "all_zero_bytes",
                id="all_zero_bytes",
            ),
            pytest.param(
                Bytes(b"\x01" * 100),
                400,
                "all_nonzero_bytes",
                id="all_nonzero_bytes",
            ),
            pytest.param(
                Bytes(b"\x01" * 75 + b"\x00" * 25),
                325,  # 75*4 + 25*1
                "75_percent_nonzero",
                id="75_percent_nonzero",
            ),
            pytest.param(
                Bytes(b"\x01" * 25 + b"\x00" * 75),
                175,  # 25*4 + 75*1
                "25_percent_nonzero",
                id="25_percent_nonzero",
            ),
            pytest.param(
                Bytes(b"\x01\x02\x03\x00"),
                13,  # 3*4 + 1*1
                "three_nonzero_one_zero",
                id="three_nonzero_one_zero",
            ),
            pytest.param(
                Bytes(b"\xff" * 50 + b"\x00" * 50),
                250,  # 50*4 + 50*1
                "half_and_half",
                id="half_and_half",
            ),
        ],
    )
    def test_token_calculation_verification(
        self,
        state_test: StateTestFiller,
        pre: Alloc,
        sender: Address,
        to: Address,
        calldata: Bytes,
        expected_standard_tokens: int,
        description: str,
        fork: Fork,
    ) -> None:
        """
        Verify token calculation is correct for different byte compositions.

        Standard calldata token formula:
        tokens = zero_bytes + (nonzero_bytes * 4)

        Floor token formula introduced in EIP-7976:
        floor_tokens = 4 * calldata_bytes
        """
        # Calculate expected costs
        intrinsic_cost_calculator = (
            fork.transaction_intrinsic_cost_calculator()
        )
        intrinsic_cost_before_execution = intrinsic_cost_calculator(
            calldata=calldata,
            contract_creation=False,
            access_list=None,
            authorization_list_or_count=None,
            return_cost_deducted_prior_execution=True,
        )

        floor_cost_calculator = fork.transaction_data_floor_cost_calculator()
        floor_cost = floor_cost_calculator(data=calldata)

        # Verify floor token calculation:
        # floor_cost = TX_BASE + (floor_tokens * floor_token_cost)
        # where floor_tokens = 4 * calldata_bytes
        gas_costs = fork.gas_costs()
        floor_token_cost = gas_costs.TX_DATA_TOKEN_FLOOR
        expected_floor_tokens = len(calldata) * 4
        expected_floor_cost = gas_costs.TX_BASE + (
            expected_floor_tokens * floor_token_cost
        )
        # EIP-2780 anchors the floor on the decomposed intrinsic base,
        # which includes the recipient-access charge for a non-self,
        # non-create transaction (the ``to`` fixture is a contract).
        expected_floor_cost += gas_costs.COLD_ACCOUNT_ACCESS
        assert floor_cost == expected_floor_cost, (
            f"Floor cost mismatch for {description}: "
            f"{floor_cost} != {expected_floor_cost} "
            f"(floor_tokens={expected_floor_tokens}, "
            f"floor_cost_per_token={floor_token_cost})"
        )

        expected_intrinsic_cost = gas_costs.TX_BASE + (
            expected_standard_tokens * gas_costs.TX_DATA_TOKEN_STANDARD
        )
        if fork.is_eip_enabled(2780):
            # EIP-2780 surfaces an explicit recipient-access charge for
            # non-self, non-create transactions; the ``to`` fixture
            # defaults to a deployed contract, so the charge applies.
            expected_intrinsic_cost += gas_costs.COLD_ACCOUNT_ACCESS
        assert intrinsic_cost_before_execution == expected_intrinsic_cost, (
            f"Intrinsic cost mismatch for {description}: "
            f"{intrinsic_cost_before_execution} != {expected_intrinsic_cost} "
            f"(standard_tokens={expected_standard_tokens})"
        )

        # Create transaction with exact gas needed
        total_intrinsic_cost = max(intrinsic_cost_before_execution, floor_cost)
        tx = Transaction(
            sender=sender,
            to=to,
            data=calldata,
            gas_limit=total_intrinsic_cost,
        )

        # Expected gas used should be the floor cost if it's greater
        expected_gas_used = total_intrinsic_cost
        tx.expected_receipt = TransactionReceipt(
            cumulative_gas_used=expected_gas_used
        )

        state_test(
            pre=pre,
            post={},
            tx=tx,
        )

test_token_calculation_verification(state_test, pre, sender, to, calldata, expected_standard_tokens, description, fork)

Verify token calculation is correct for different byte compositions.

Standard calldata token formula: tokens = zero_bytes + (nonzero_bytes * 4)

Floor token formula introduced in EIP-7976: floor_tokens = 4 * calldata_bytes

Source code in tests/amsterdam/eip7976_increase_calldata_floor_cost/test_additional_coverage.py 
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@pytest.mark.parametrize(
    "calldata,expected_standard_tokens,description",
    [
        pytest.param(
            Bytes(b"\x00" * 100),
            100,
            "all_zero_bytes",
            id="all_zero_bytes",
        ),
        pytest.param(
            Bytes(b"\x01" * 100),
            400,
            "all_nonzero_bytes",
            id="all_nonzero_bytes",
        ),
        pytest.param(
            Bytes(b"\x01" * 75 + b"\x00" * 25),
            325,  # 75*4 + 25*1
            "75_percent_nonzero",
            id="75_percent_nonzero",
        ),
        pytest.param(
            Bytes(b"\x01" * 25 + b"\x00" * 75),
            175,  # 25*4 + 75*1
            "25_percent_nonzero",
            id="25_percent_nonzero",
        ),
        pytest.param(
            Bytes(b"\x01\x02\x03\x00"),
            13,  # 3*4 + 1*1
            "three_nonzero_one_zero",
            id="three_nonzero_one_zero",
        ),
        pytest.param(
            Bytes(b"\xff" * 50 + b"\x00" * 50),
            250,  # 50*4 + 50*1
            "half_and_half",
            id="half_and_half",
        ),
    ],
)
def test_token_calculation_verification(
    self,
    state_test: StateTestFiller,
    pre: Alloc,
    sender: Address,
    to: Address,
    calldata: Bytes,
    expected_standard_tokens: int,
    description: str,
    fork: Fork,
) -> None:
    """
    Verify token calculation is correct for different byte compositions.

    Standard calldata token formula:
    tokens = zero_bytes + (nonzero_bytes * 4)

    Floor token formula introduced in EIP-7976:
    floor_tokens = 4 * calldata_bytes
    """
    # Calculate expected costs
    intrinsic_cost_calculator = (
        fork.transaction_intrinsic_cost_calculator()
    )
    intrinsic_cost_before_execution = intrinsic_cost_calculator(
        calldata=calldata,
        contract_creation=False,
        access_list=None,
        authorization_list_or_count=None,
        return_cost_deducted_prior_execution=True,
    )

    floor_cost_calculator = fork.transaction_data_floor_cost_calculator()
    floor_cost = floor_cost_calculator(data=calldata)

    # Verify floor token calculation:
    # floor_cost = TX_BASE + (floor_tokens * floor_token_cost)
    # where floor_tokens = 4 * calldata_bytes
    gas_costs = fork.gas_costs()
    floor_token_cost = gas_costs.TX_DATA_TOKEN_FLOOR
    expected_floor_tokens = len(calldata) * 4
    expected_floor_cost = gas_costs.TX_BASE + (
        expected_floor_tokens * floor_token_cost
    )
    # EIP-2780 anchors the floor on the decomposed intrinsic base,
    # which includes the recipient-access charge for a non-self,
    # non-create transaction (the ``to`` fixture is a contract).
    expected_floor_cost += gas_costs.COLD_ACCOUNT_ACCESS
    assert floor_cost == expected_floor_cost, (
        f"Floor cost mismatch for {description}: "
        f"{floor_cost} != {expected_floor_cost} "
        f"(floor_tokens={expected_floor_tokens}, "
        f"floor_cost_per_token={floor_token_cost})"
    )

    expected_intrinsic_cost = gas_costs.TX_BASE + (
        expected_standard_tokens * gas_costs.TX_DATA_TOKEN_STANDARD
    )
    if fork.is_eip_enabled(2780):
        # EIP-2780 surfaces an explicit recipient-access charge for
        # non-self, non-create transactions; the ``to`` fixture
        # defaults to a deployed contract, so the charge applies.
        expected_intrinsic_cost += gas_costs.COLD_ACCOUNT_ACCESS
    assert intrinsic_cost_before_execution == expected_intrinsic_cost, (
        f"Intrinsic cost mismatch for {description}: "
        f"{intrinsic_cost_before_execution} != {expected_intrinsic_cost} "
        f"(standard_tokens={expected_standard_tokens})"
    )

    # Create transaction with exact gas needed
    total_intrinsic_cost = max(intrinsic_cost_before_execution, floor_cost)
    tx = Transaction(
        sender=sender,
        to=to,
        data=calldata,
        gas_limit=total_intrinsic_cost,
    )

    # Expected gas used should be the floor cost if it's greater
    expected_gas_used = total_intrinsic_cost
    tx.expected_receipt = TransactionReceipt(
        cumulative_gas_used=expected_gas_used
    )

    state_test(
        pre=pre,
        post={},
        tx=tx,
    )

Parametrized Test Cases

This test generates 6 parametrized test cases across 1 fork.