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Sei Giga

Benjamin Marsh, Steven Landers, Jayendra Jog

TL;DR

Sei Giga targets scalable, secure EVM execution on a public PoS L1 by decoupling data availability, consensus, and execution. It introduces Autobahn-style multi-proposer data dissemination with PoA certificates and a Cut-based global ordering, enabling async block execution and parallel processing to achieve >$5$ gigagas/sec throughput and sub-$400$ ms finality. Core contributions include a DA lanes architecture, a flat LSM-based storage with cryptographic accumulators, an evmone-based execution client, and a Block-STM-style OCC execution model that preserves determinism across validators. The practical impact is enabling web2-scale usage on a verifiable, permissionless blockchain while maintaining Ethereum-like EVM compatibility and robust economic incentives for validators and governance.

Abstract

We introduce the Sei Giga, a multi-concurrent producer parallelized execution EVM layer one blockchain. In an internal testnet Giga has achieved >5 gigagas/sec throughput and sub 400ms finality. Giga uses Autobahn for consensus with separate DA and consensus layers requiring f+1 votes for a PoA on the DA layer before consensus. Giga reaches consensus over ordering and uses async block execution and state agreement to remove execution from the consensus bottleneck.

Sei Giga

TL;DR

Sei Giga targets scalable, secure EVM execution on a public PoS L1 by decoupling data availability, consensus, and execution. It introduces Autobahn-style multi-proposer data dissemination with PoA certificates and a Cut-based global ordering, enabling async block execution and parallel processing to achieve > gigagas/sec throughput and sub- ms finality. Core contributions include a DA lanes architecture, a flat LSM-based storage with cryptographic accumulators, an evmone-based execution client, and a Block-STM-style OCC execution model that preserves determinism across validators. The practical impact is enabling web2-scale usage on a verifiable, permissionless blockchain while maintaining Ethereum-like EVM compatibility and robust economic incentives for validators and governance.

Abstract

We introduce the Sei Giga, a multi-concurrent producer parallelized execution EVM layer one blockchain. In an internal testnet Giga has achieved >5 gigagas/sec throughput and sub 400ms finality. Giga uses Autobahn for consensus with separate DA and consensus layers requiring f+1 votes for a PoA on the DA layer before consensus. Giga reaches consensus over ordering and uses async block execution and state agreement to remove execution from the consensus bottleneck.

Paper Structure

This paper contains 28 sections, 7 equations, 13 figures, 1 algorithm.

Table of Contents

  1. Introduction
  2. Comparison to Sei v2
  3. Async Execution
  4. State consensus
  5. Execution client
  6. Pipelining and encoding
  7. Consensus and Data Dissemination
  8. Overview and High-Level Architecture
  9. Data Dissemination Layer (Lanes) and PoA
  10. Lane Structure and Proposal Process.
  11. Voting and PoA Certification.
  12. Instant Referencing.
  13. Data Availability and Final Execution
  14. Data Synchronization (DA) and Asynchronous Retrieval.
  15. Final Global Ordering.
  16. ...and 13 more sections

Figures (13)

  • Figure 1: v2 vs Giga
  • Figure 2: Async block execution
  • Figure 3: Giga Client
  • Figure 4: Multi-producer
  • Figure 5: Prepare
  • ...and 8 more figures

Theorems & Definitions (2)

  • Claim 1: Deterministic Execution
  • proof : Sketch