🕸 Decentralized Sequencer

General Overview

• HotStuff
  • HotStuff-2
  • Jolteon (-33% latency) [In Production on Aptos]
• Narwhal & Tusk
  • Proposes separating the task of reliable transaction dissemination from transaction ordering for performance increase
  • Originally implemented by Facebook Research, see GitHub
• Bullshark [In Production on Sui]
  • Vanilla Bullshark = Bullshark + support for “weak links” (see section 5.1 here)
• Shoal
  • A framework for higher performance for DAG consensus (Bullshark) using pipelining and leader reputation
  • Improves Bullshark latency by 40% in failure-free cases, 80% in failure cases

Further Reading

• DiemBFT v4: State Machine Replication in the Diem Blockchain
• Narwhal and Bullshark, Sui's Mempool and Consensus Engines
• Cosmos without Tendermint: Exploring Narwhal and Bullshark
• MEV Resistance on a DAG | Chainlink Blog
• Cordial Miners: Fast and Efficient Consensus for Every Eventuality