This paper presents protocols for assigning and collecting fees for Lightning services, thus reducing the potential for spam on the Lightning Network. The protocols determine and collect fees for all significant costs that are incurred. While previous proposals have attempted to reduce spam by charging fees for delayed and/or failed payments, those proposals have failed to reimburse certain costs or have relied on trust to ensure that fees are not stolen.
The collection of fees presented here relies on griefer-penalization. That is, a party can be made to lose certain funds by a channel partner who griefs them, but in such a case the griefer also has to lose a comparable amount of funds. Therefore, a party that only selects self-interested partners will never be griefed.