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LND merges experimental channel-jamming reputation measurements

The merged subsystem scored and logged channel behavior without yet enforcing forwarding restrictions, advancing a proposed defense into an observation stage.

LND merged the core of a local-reputation subsystem on October 16, 2026. The experimental code measured channel behavior and logged whether activity would qualify for protected resources under the proposed approach. It was read-only rather than an enforcement system.

Channel jamming exploits the resources needed to keep conditional Lightning payments pending. A reputation approach seeks to distinguish behavior that has earned access to protected capacity from behavior that has not, while avoiding indiscriminate treatment of every forwarding request.

Measurement before enforcement allows developers to observe how such distinctions behave without immediately refusing payments according to the new scores. That makes the maturity stage central to understanding the merge.

The October change was concrete implementation work on a defense, not proof that channel jamming had been solved. It introduced instrumentation needed to evaluate the mechanism before deciding how it should affect actual forwarding.

Sources

  1. [1/?] Local reputation: subsystem core, read only by GeorgeTsagk · Pull Request #10919 · lightningnetwork/lnd · GitHub