Joost Jager

#197: Joost Jager

- Griefing attacks on Lightning channels allow attackers to jam routing capacity by sending slow-settling payments at minimal cost, effectively disabling channels without stealing funds. - Circuit Breaker is a mitigation tool that limits the number of in-flight HTLCs on incoming channels, raising the cost and complexity of executing channel jamming attacks. - Multi-path payments and Wumbo channels together improve user experience and liquidity by allowing users to combine channel balances, potentially reducing the need for very large channels. - Private vs. public channels: End users should primarily use private channels for non-routing purposes, while routing nodes benefit from private "shadow channels" to remain less visible as attack targets. - Multiple Lightning implementations (LND, Eclair, C-Lightning) maintain interoperability through bi-weekly spec discussions, with each implementation exploring different technical approaches to features like MPP routing algorithms. - Watchtowers and chain security remain important long-term concerns; watchtowers deter breach attempts through uncertainty, while fee market conditions and anchor channels help mitigate timelocked payment risks.