Odaily News Taiko, the second-layer Ethereum network based on zkRollup, announced the launch of the Alpha-5 test network Jólnir, adding a proposal and proof implementation mechanism inspired by Proposer-Builder Separation (PBS). In Jólnir, the Proposer needs to obtain bond from the Prover to propose a block. Prover needs to deposit some TTKOj tokens to obtain bond. If a Prover proves their assigned block within the specified proof time target, they will reclaim the bond and keep the upfront fees they received from the off-chain Proposer. TTKOj has been distributed to A1 and A2 testnet Proposers and Provers (2.5 TTKOj per address). A3 and A4 testnet Proposers and Prover will also receive TTKOj soon. Additionally, Taiko will no longer support Eldfell L3. Grímsvötn L2 will continue to operate until October 31st to support project migration.