📝Sequencer

In the Rollup Executor, the ME Network is required for settlement and DA, with the sequencer acting as the intermediary. To avoid single points of failure and centralization, ME Network has abandoned centralized single-point sequencer networks in favor of a decentralized sequencer network.

1. Rollup Chains Can Deploy or Use Custom "Decentralized Sequencers"

ME Network supports Rollup chains in deploying custom "sequencer nodes." This "permissioned and permissionless PoS sequencing" mechanism allows Rollup chains to establish sequencer node networks tailored to their specific needs. This innovation significantly enhances the deployment flexibility of ME Network, ensuring that Rollup performance is no longer constrained by the number and performance of ME Hub validator nodes, thereby more precisely catering to the specific business requirements of various RollupApp.

2. Decentralized Sequencers on Rollup Chains Require MEC Staking on ME Hub

In the modular architecture of ME Network 2.0, the ME Hub integrates a dedicated Rollup chain management module. By staking MEC on the ME Hub, decentralized sequencers are included in the Rollup chain management module and the corresponding sequencer list for that Rollup chain. The probability of block production for a sequencer on the corresponding Rollup chain is directly proportional to its MEC staking ratio, creating a fair and clearly incentivized participation mechanism.

3. Decentralized Sequencers on Rollup Chains Utilize a Leader Election Mechanism

The Rollup layer of ME Network introduces a "leader" election mechanism similar to the consensus nodes on the ME Hub. This decentralized sequencer system is significantly superior to traditional centralized single-point sequencers, as it increases both the reliability and fairness of the Rollapp transaction on-chain process.

Reliability: It effectively mitigates the risk of transaction submission interruption caused by unexpected failures of single-point sequencers, thereby preventing potential revenue loss.

Fairness: It substantially increases the difficulty for single-point sequencers to manipulate sequencing for undue profit, making malicious behavior more challenging.