# \#sequencer **URL:** https://research.arbitrum.io/tag/sequencer/3.md [Latest](https://research.arbitrum.io/latest.md) · [Categories](https://research.arbitrum.io/categories.md) · [Tags](https://research.arbitrum.io/tags.md) --- ## [TimeBoost and Backrunning: Probabilistic Strategies](https://research.arbitrum.io/t/timeboost-and-backrunning-probabilistic-strategies/9727)
**Author:** [@kakia](https://research.arbitrum.io/u/kakia)\ **Replies:** 0\ **Last updated:** [March 18, 2025, 1:42pm UTC](https://research.arbitrum.io/t/timeboost-and-backrunning-probabilistic-strategies/9727 "2025-03-18T13:42:45Z")
We study backrunning strategies and the effect of TimeBoost policy on them. The modeling and analysis allows to answer the following questions: how much of backrunning opportunity value goes to the time advantaged part… --- ## [Decentralized Timeboost Specification](https://research.arbitrum.io/t/decentralized-timeboost-specification/9676)
**Author:** [@jill-espresso](https://research.arbitrum.io/u/jill-espresso)\ **Replies:** 2\ **Last updated:** [September 25, 2024, 8:24pm UTC](https://research.arbitrum.io/t/decentralized-timeboost-specification/9676 "2024-09-25T20:24:09Z")
Decentralized Timeboost Specification - Feedback Welcome We’re excited to share that Espresso Systems and Offchain Labs have jointly published the full specifications for Decentralized Timeboost. The design builds off o… --- ## [Decentralized Timeboost R&D Update](https://research.arbitrum.io/t/decentralized-timeboost-r-d-update/9550)
**Author:** [@ian-espresso](https://research.arbitrum.io/u/ian-espresso)\ **Replies:** 1\ **Last updated:** [April 2, 2024, 2:17pm UTC](https://research.arbitrum.io/t/decentralized-timeboost-r-d-update/9550 "2024-04-02T14:17:33Z")
Hey everyone, this is Ian from the Espresso Systems team. As some of you know, Espresso Systems has been working closely with the Offchain Labs team on developing Decentralized Timeboost, a modified first come-first ser… --- ## [How do proposers take turns to submit new state roots on L1?](https://research.arbitrum.io/t/how-do-proposers-take-turns-to-submit-new-state-roots-on-l1/9565)
**Author:** [@jli29](https://research.arbitrum.io/u/jli29)\ **Replies:** 2\ **Last updated:** [January 28, 2024, 1:17am UTC](https://research.arbitrum.io/t/how-do-proposers-take-turns-to-submit-new-state-roots-on-l1/9565 "2024-01-28T01:17:31Z")
Arbitrum One currently has an allowlist for validators (The state of Arbitrum's progressive decentralization | Arbitrum DAO - Governance docs). My question is what determines when is the turn for which validator to submi… --- ## [A Focus on Sequencer and Proposer Failures](https://research.arbitrum.io/t/a-focus-on-sequencer-and-proposer-failures/9533)
**Author:** [@shivam](https://research.arbitrum.io/u/shivam)\ **Replies:** 1\ **Last updated:** [December 4, 2023, 1:30pm UTC](https://research.arbitrum.io/t/a-focus-on-sequencer-and-proposer-failures/9533 "2023-12-04T13:30:11Z")
TL;DR In L2 blockchains, sequencers and proposers play vital roles. Sequencers validate transactions and bundle them for L1 transmission, while proposers submit state commitments to L1. Failures in these entities can occ… --- ## [Challenging Periods Reimagined: The Key Role of Sequencer Decentralization](https://research.arbitrum.io/t/challenging-periods-reimagined-the-key-role-of-sequencer-decentralization/9189)
**Author:** [@daniFi](https://research.arbitrum.io/u/daniFi)\ **Replies:** 5\ **Last updated:** [July 13, 2023, 8:54am UTC](https://research.arbitrum.io/t/challenging-periods-reimagined-the-key-role-of-sequencer-decentralization/9189 "2023-07-13T08:54:03Z")
Check out the complete second part of the Challenging Periods Reimagined Series by clicking here. This part focuses on sequencer decentralization and its integration into our proposed dynamic challenging period model. If… --- ## [Thoughts on Arbitrum's Proposal to Score Connections by PoW](https://research.arbitrum.io/t/thoughts-on-arbitrums-proposal-to-score-connections-by-pow/8121)
**Author:** [@zkstonks](https://research.arbitrum.io/u/zkstonks)\ **Replies:** 1\ **Last updated:** [March 1, 2023, 9:21pm UTC](https://research.arbitrum.io/t/thoughts-on-arbitrums-proposal-to-score-connections-by-pow/8121 "2023-03-01T21:21:07Z")
Offchain Labs is developing a proof-of-work mechanism to disincentivize massive sybil attacks by MEV searchers on the Arbitrum sequencer. In this post, I describe issues with the proposed mechanism and suggest alternativ… --- ## [Hybrid transaction ordering policy](https://research.arbitrum.io/t/hybrid-transaction-ordering-policy/155)
**Author:** [@edfelten](https://research.arbitrum.io/u/edfelten)\ **Replies:** 6\ **Last updated:** [November 4, 2022, 1:22pm UTC](https://research.arbitrum.io/t/hybrid-transaction-ordering-policy/155 "2022-11-04T13:22:34Z")
Inspired by some discussions and posts about transaction ordering (like this one), we’re thinking about how we might maintain the desirable properties of our transaction ordering policy (such as low latency, transparency…