INTEGRATING 3-SLOT FINALITY WITH EPBS, FOCIL, AND PEERDAS

Summary from the TLDR Crypto newsletter

Researchers Luca Zanolini and Roberto Saltini explore integrating Ethereum's proposed Three-Slot Finality protocol with three other major upgrades: enshrined Proposer-Builder Separation (ePBS), Fork-Choice Inclusion Lists (FOCIL), and PeerDAS, aiming to achieve finality in just three slots while maintaining censorship resistance and data availability. The integration requires restructuring slot timelines to accommodate builder-proposer separation, introducing an Availability Committee to verify payload release, and modifying the RLMD-GHOST fork-choice algorithm to handle different payload availability states. While the authors believe the combination preserves 3SF's core security properties under assumptions of synchrony and reduced adversarial resilience, they identify a critical challenge around low validator participation scenarios where builders may struggle to reach the 60% threshold needed for safe payload release.