test_sstore_refund_scales_with_cpsb()

Documentation for tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_pricing.py::test_sstore_refund_scales_with_cpsb@2119b382.

Generate fixtures for these test cases for Amsterdam with:

fill -v tests/amsterdam/eip8037_state_creation_gas_cost_increase/test_state_gas_pricing.py::test_sstore_refund_scales_with_cpsb --fork Amsterdam

Test SSTORE restoration refund scales with block gas limit.

Zero-to-nonzero-to-zero in the same tx refunds the state gas (64 * cpsb) via refund_counter.

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

@pytest.mark.parametrize("block_gas_limit", BLOCK_GAS_LIMITS)
@pytest.mark.valid_from("EIP8037")
def test_sstore_refund_scales_with_cpsb(
    state_test: StateTestFiller,
    pre: Alloc,
    block_gas_limit: int,
    fork: Fork,
) -> None:
    """
    Test SSTORE restoration refund scales with block gas limit.

    Zero-to-nonzero-to-zero in the same tx refunds the state gas
    (64 * cpsb) via refund_counter.
    """
    gas_limit_cap = fork.transaction_gas_limit_cap()
    assert gas_limit_cap is not None
    env = Environment(gas_limit=block_gas_limit)
    sstore_state_gas = Op.SSTORE(new_value=1).state_cost(fork)

    contract = pre.deploy_contract(
        code=(Op.SSTORE(0, 1) + Op.SSTORE(0, 0)),
    )

    tx_gas = min(gas_limit_cap + sstore_state_gas, block_gas_limit)
    tx = Transaction(
        to=contract,
        gas_limit=tx_gas,
        sender=pre.fund_eoa(),
    )

    post = {contract: Account(storage={0: 0})}
    state_test(env=env, pre=pre, post=post, tx=tx)

Parametrized Test Cases

This test generates 10 parametrized test cases across 1 fork.