Arbitrum DAO has opened a vote on the proposal to implement the BoLD protocol across Arbitrum's ecosystem chains. BoLD (Bounded Liquidity Delay) is a new dispute resolution protocol designed to replace the current mechanism and allow permissionless validation while minimizing the risk of delay attacks. The implementation of BoLD will bring Arbitrum closer to becoming a Stage 2 Rollup, according to the classification by L2Beat.
Previously, the Arbitrum Foundation proposed upgrading the Rollup contracts on Arbitrum One and Arbitrum Nova to use BoLD, with the goal of improving security and decentralization for Arbitrum chains.