# Sequencing List

A list of projects and proposals for decentralized and shared sequencing.

## Projects

Note: the maturity of these projects varies, and the documentation is usually not great.

- [AltLayer Beacon Layer](https://docs.altlayer.io/altlayer-documentation/beacon-layer/beacon-layer-overview)
- [Astria](https://docs.astria.org/)
- [Astria Development Cluster](https://blog.astria.org/introducing-the-astria-development-cluster/)
- [(Anoma) Chimera Chains](https://anoma.net/blog/chimera-chains)
- [Dymension Hub](https://docs.dymension.xyz/learn/dymension-hub/application)
- L1 + DA, interop using IBC.
- [Espresso](https://docs.espressosys.com)
- [Writeup on the Espresso Sequencer](https://hackmd.io/@EspressoSystems/EspressoSequencer)
- [Writeup on Shared Sequencing](https://hackmd.io/@EspressoSystems/SharedSequencing)
- [Espresso Sequencer Paper](https://github.com/EspressoSystems/HotShot/blob/main/docs/espresso-sequencer-paper.pdf)
- [NodeKit SEQ](https://nodekit.gitbook.io/nodekit-documentation/)
- [Radius](https://docs.theradius.xyz/)
- [Writeup on Radius Sequencer](https://hackmd.io/@zeroknight/radius_decentralizing_rollup_sequencers)

## Proposals

- [Sharing a Sequencer Set by Separating Execution from Aggregation](https://forum.celestia.org/t/sharing-a-sequencer-set-by-separating-execution-from-aggregation/702)
- [Shared Validity Sequencing](https://www.umbraresearch.xyz/writings/shared-validity-sequencing)
- [Aztek's Sequencing RFP](https://forum.aztec.network/t/request-for-proposals-decentralized-sequencer-selection/350) ([Medium Post](https://medium.com/aztec-protocol/aztec-sequencer-selection-finalists-122dbc6bb4))
- [Fernet (Winner)](https://hackmd.io/0FwyoEjKSUiHQsmowXnJPw)
- [B52 (Finalist)](https://hackmd.io/VIeqkDnMScG1B-DIVIyPLg)
- [Whisk-y](https://forum.aztec.network/t/whisk-y-should-we-use-whisk-for-sequencer-selection/365)
- [Cookie Jar](https://forum.aztec.network/t/proposal-sequencer-selection-cookie-jar/448)
- [Sequencer Schmequencer](https://discourse.aztec.network/t/proposal-sequencer-selection-sequencer-schmequencer/478)
- [Irish Coffee](https://forum.aztec.network/t/proposal-sequencer-selection-irish-coffee/483#vrf-specification-4)
- [Espresso Martini](https://forum.aztec.network/t/proposal-sequencer-selection-espresso-martini/486)
- [Proof of Governance](https://dba.mirror.xyz/UTPfxWe65dYrUu_RJX-5VkAJypFRyw3AZh6m0dRXYZk) ([Video](https://www.youtube.com/watch?v=toPd1vgHjVE))
- [Cross-ORU Contingent Blocks](https://prestwich.substack.com/p/contingency)
- [Based Rollups](https://ethresear.ch/t/based-rollups-superpowers-from-l1-sequencing/15016) ([Video](https://www.youtube.com/watch?v=YqiCpLd8ecM&t=1964s))

## Research Papers

- [Buying Time: Latency Racing vs. Bidding for Transaction Ordering (Timeboost)](https://arxiv.org/pdf/2306.02179.pdf)
- [SoK: Decentralized Sequencers for Rollups](https://arxiv.org/pdf/2310.03616.pdf)