In May this year, Bitcoin Core contributors Gleb Naumenko and Antoine Riard proposed the use of Fidelity Bonds for LN Routing to prevent channel jamming, a type of denial-of-service (DOS) attack that can occur on the Lightning Network.

Channel jamming, first described in 2015 by Rusty Russell, usually describes a scenario in which an attacker sends a payment to themselves through a series of routing nodes and then stops responding. However, channel jamming can also occur when a laggy receiver node does not complete a payment. As a consequence, the funds are locked in a routing channel until the payment times out, leaving them unavailable for other payments on the network.