CFP last date
20 October 2025
Call for Paper
November Edition
IJCA solicits high quality original research papers for the upcoming November edition of the journal. The last date of research paper submission is 20 October 2025

Submit your paper
Know more
Random Articles
Reseach Article

Decentralizing Sequencers in Rollups using Delegated Proof-of-Stake Consensus Mechanism

by Md Zaki Muzahid
International Journal of Computer Applications
Foundation of Computer Science (FCS), NY, USA
Volume 187 - Number 40
Year of Publication: 2025
Authors: Md Zaki Muzahid
10.5120/ijca2025925717

Md Zaki Muzahid . Decentralizing Sequencers in Rollups using Delegated Proof-of-Stake Consensus Mechanism. International Journal of Computer Applications. 187, 40 ( Sep 2025), 51-58. DOI=10.5120/ijca2025925717

@article{ 10.5120/ijca2025925717,
author = { Md Zaki Muzahid },
title = { Decentralizing Sequencers in Rollups using Delegated Proof-of-Stake Consensus Mechanism },
journal = { International Journal of Computer Applications },
issue_date = { Sep 2025 },
volume = { 187 },
number = { 40 },
month = { Sep },
year = { 2025 },
issn = { 0975-8887 },
pages = { 51-58 },
numpages = {9},
url = { https://ijcaonline.org/archives/volume187/number40/decentralizing-sequencers-in-rollups-using-delegated-proof-of-stake-consensus-mechanism/ },
doi = { 10.5120/ijca2025925717 },
publisher = {Foundation of Computer Science (FCS), NY, USA},
address = {New York, USA}
}
%0 Journal Article
%1 2025-09-23T00:36:53.027984+05:30
%A Md Zaki Muzahid
%T Decentralizing Sequencers in Rollups using Delegated Proof-of-Stake Consensus Mechanism
%J International Journal of Computer Applications
%@ 0975-8887
%V 187
%N 40
%P 51-58
%D 2025
%I Foundation of Computer Science (FCS), NY, USA
Abstract

In the Ethereum blockchain network, high transaction fees due to limited block space and high demand necessitate scalable solutions. Layer 2 (L2) scaling solutions, particularly rollups, offer a promising approach by processing transactions off-chain and posting compressed data to the main chain (Layer 1). However, current L2 rollups rely heavily on centralized sequencer nodes, which introduces centralization risks and single points of failure. Thus, to address these concerns, this paper explores the existing issues associated with centralized sequencers exemplified by real-life incidents. Consequently, reviews the existing decentralized sequencer models by describing their operations. In addition, this study proposes a novel approach of decentralizing sequencers leveraging the Delegated Proof of Stake (DPoS) consensus mechanism depicting its’ components and step by step procedures. Finally, providing comparison among the novel approach and the existing decentralized sequencer frameworks along with their limitations.

References
  1. T. A. Alghamdi, R. Khalid and N. Javaid, ”A Survey of Blockchain Based Systems: Scalability Issues and Solutions, Applications and Future Challenges,” in IEEE Access, vol. 12, pp. 79626-79651, 2024, doi: 10.1109/ACCESS.2024.3408868
  2. Polygon ZKEVM: Network Outage Report(04/08). (2024, April 10). Polygon Community Forum. https://forum.polygon.technology/t/polygon-zkevm-network-outage-report-04-08/13751
  3. Fernau, O. (2022, January 10). Arbitrum goes down citing sequencer problems. The Defiant. https://thedefiant.io/news/defi/arbitrum-outage-2
  4. ArbitrumFoundation. (n.d.). docs/postmortems/15 Dec 2023.md at· ArbitrumFoundation/docs. GitHub. https://github.com/ArbitrumFoundation/docs/blob/50ee88b406e6e5f3866b32d147d05a6adb0ab50e/postmortems/15\_Dec\_2023.md
  5. Buterin, V. (2021, January 5). An incomplete guide to rollups. https://vitalik.eth.limo/general/2021/01/05/rollup.html
  6. Buterin, V. ”Ethereum white paper.” GitHub repository 1 (2013): 22-23. https://ethereum.org/en/whitepaper/
  7. Castonguay, P. (2021, December 12). The collapse of FairWin’s $125m Ponzi scheme - Philippe Castonguay - medium. Medium. https://medium.com/@PhABC/the-collapse-of-fairwins-125mponzi-scheme-61a66b273420
  8. Polygon Labs. (n.d.). Transaction batching - Polygon Knowledge Layer. https://docs.polygon.technology/zkEVM/architecture/protocol/ transaction-life-cycle/transaction-batching/?h=batchdata
  9. Polygon Labs. (n.d.-a). Sequencing batches - Polygon Knowledge Layer. https://docs.polygon.technology/zkEVM/architecture/protocol/sequencing-batches/?h=sequen\#sending-batches-to-l1\
  10. Larimer, Daniel. ”Delegated proof-of-stake (dpos).” Bitshare whitepaper 81 (2014): 85. http://107.170.30.182/security/delegated-proof-ofstake.php
  11. Yang, Fan et al. ”Delegated Proof of Stake With Downgrade: A Secure and Efficient Blockchain Consensus Algorithm With Downgrade Mechanism”. IEEE Access (2019). vol 7, pages 118541-118555
  12. EspressoSystems. (2023, September 7.). HotShot/docs/espressosequencer-paper.pdf at main · EspressoSystems/HotShot. GitHub. https://github.com/EspressoSystems/HotShot/blob/main/docs/espresso-sequencer-paper.pdf
  13. Espresso. (2023, September 7). Sequencer Marketplace — Espresso. https://docs.espressosys.com/sequencer/espressoarchitecture/sequencer-marketplace
  14. Astria. (2023, December 11). Introduction — Astria. Astria the Sequencing Layer. https://docs.astria.org/overview/1-introduction
  15. Astria. (2023, December 10). Transaction Flow — Astria. https://docs.astria.org/overview/transaction-flow
  16. Metis Foundation. (2024, March 14). Decentralized Sequencer - MetisSmart L2. https://www.metis.io/decentralized-sequencer
  17. Metis Foundation. (2024b, March 14). Transaction cycle — Metis. Metis Developer Documentation. https://docs.metis.io/dev/decentralizedsequencer/overview/transaction-cycle
  18. Aztec. (2023, October 10). Fernet - A protocol for random sequencer selection for the Aztec Network. HackMD . https://hackmd.io/@aztec-network/fernet
  19. Radius Sequencer. (2023, November 30). Radius - Overview. TheRadius. https://docs.theradius.xyz/deep-dive/introduction
  20. Radius. (2023a, November 30). Encrypted Mempool — Radius. Radius Sequencing. https://docs.theradius.xyz/testnets/porticotestnet/encrypted-mempool
  21. Witnet Decentralized Oracle. (2017, November). Wallet API Endpoints. Witnet Docs. https://docs.witnet.io/developerreference/integrations/wallet-api#send transaction
  22. GeeksforGeeks. (2023, March 28). What is Ethereum Mempool? GeeksforGeeks. https://www.geeksforgeeks.org/what-is-ethereum-mempool/
  23. Douceur, J.R. ”The Sybil Attack”. Druschel, P., Kaashoek, F., Rowstron, A. (eds) Peer-to-Peer Systems. IPTPS 2002. Lecture Notes in Computer Science, vol 2429. Springer, Berlin, Heidelberg.
  24. Radius. (2023b, November 30). Leader-based — Radius. Radius Sequencing. https://docs.theradius.xyz/testnets/porticotestnet/distributed-sequencing/leader-based
  25. Metis Lab Foundation Security Audit Report. (n.d.). Google Docs. https://drive.google.com/file/d/1AHDVzVUcRh8ghmfLR8qRfaHpgML7v9vW/view
  26. Fernet. (2023, October). Sequencer selection Fernet - HackMD. HackMD. https://hackmd.io/0FwyoEjKSUiHQsmowXnJPw#Introduction
Index Terms

Computer Science
Information Sciences

Keywords

Rollups Decentralized Sequencers Layer 2 (L2) Scaling Delegated Proof of Stake