Zellular Sequencer

Zellular is a decentralized sequencer that enables developing high-throughput dApps implemented in high-level languages like JS, Python, and Go. These dApps can be decentralized as Byzantine Fault Tolerant (BFT) services, replicated and secured on EigenLayer and other restaking platforms.

High-throughput dApps need to manage a large volume of user interactions, such as transactions or updates, which need to be processed quickly and consistently. In a decentralized environment, these requests are no longer directed to a single server but must be propagated across all replicas of the service in the exact same sequence to ensure consistency among the nodes. Zellular acts as a decentralized, high-performance messaging system, ensuring that updates are propagated and applied in the same order across all nodes, preserving database uniformity.

Note

This project is under active development and should not be used in production yet.

Contents

• Architecture
• The Protocol
  • Design Principles
    • No Proposer Rotation
    • No Gossip Propagation
  • The Workflow
    • Posting
    • Finalising
    • Disputing
    • Switching
• Zellular SDK
  • Dependencies
  • Installation
  • Getting Nodes
  • Posting Transactions
  • Fetching and Verifying Transactions
• Integration Guide
  • Python Code for a Simple Order-Book
    • Setting up the Environment
    • User Authentication
    • Order Submission
    • Order Matching
  • Applying Signature-based Authentication
    • Identifying Users by their Public Keys
    • Authorising Users by their Signatures
  • Sequencing orders before applying them
    • Sending orders to the Sequencer
    • Receiving sequenced orders from the sequencer