Based Rollup

A Based Rollup (also known as an L1-sequenced rollup) is a blockchain scaling solution where transaction sequencing is handled directly by the Layer 1 blockchain—typically Ethereum—rather than by a separate, centralized sequencer. 

What Is a Based Rollup?

A Based Rollup (also known as an L1-sequenced rollup) is a blockchain scaling solution where transaction sequencing is handled directly by the Layer 1 blockchain—typically Ethereum—rather than by a separate, centralized sequencer. This model was formalized by Ethereum researcher Justin Drake in 2023. By leveraging the security, decentralization, and consensus infrastructure of Ethereum, Based Rollups avoid the complexity and centralization risks of traditional Layer 2 solutions.

How Based Rollups Work

In a Based Rollup architecture:

  • Layer 1 proposers, searchers, and builders collaboratively integrate Layer 2 transaction bundles directly into Ethereum blocks.
  • The rollup’s execution layer processes transactions off-chain, while Ethereum handles its consensus, data availability, and settlement layers.

This setup eliminates the need for separate sequencers, reducing system complexity and aligning incentives across layers.

Real-World Examples & Industry Momentum

  • Taiko, a leading Based Rollup implementation, launched the Katla testnet using a “Based Contestable Rollup” (BCR), introducing dispute-resolution mechanisms at the protocol level.
  • Industry giants like Optimism, Arbitrum, Scroll, and Base are exploring Based Rollup frameworks to deepen Ethereum alignment, reduce centralization, and re-route MEV rewards to Ethereum validators.

Why Based Rollups Are Trending in Crypto (2024–2025)

Recent interest in Based Rollups reflects broader ecosystem goals:

  • Search volume has risen for terms like “based rollup crypto,” “Ethereum based rollup,” and “based sequencing.”
  • Developers and communities are increasingly attracted to solutions that prioritize security, decentralization, and composability over pure throughput—traits epitomized by Based Rollups.

Summary: Based Rollups at a Glance

Based Rollups offer a compelling balance between security and scalability by:

  • Delegating sequencing to Ethereum’s decentralized validator network
  • Eliminating centralized sequencers and token-based governance
  • Enhancing interoperability and aligning economic incentives with Ethereum’s core ethos

They have emerged as a trusted and forward-looking scaling solution, drawing rising developer interest and advancing Ethereum’s long-term scalability road map.