Executive Summary

David Hoffman, a prominent voice in the blockchain space, has articulated a vision positioning Ethereum's Layer 1 (L1) as the world's nascent primary settlement layer. This architectural shift anticipates Layer 2s (L2s) evolving into specialized authorization networks, drawing parallels with the authorization and settlement mechanisms prevalent in traditional finance. This re-envisioning suggests a move towards a more scalable, efficient, and cryptographically assured financial system, departing from reliance on legal frameworks.

The Event in Detail: Ethereum's Architectural Evolution

The fundamental premise underpinning this evolution is the transition from a financial system based on law to one rooted in mathematics. This math-based finance, characterized by cryptographic proofs and crypto-economic assurances, offers enhanced scalability and trustworthiness compared to systems reliant on specific national legal structures. In this paradigm, the concept of "Code is Law" replaces the mutable nature of legal statutes with the objective, immutable properties of mathematics.

Historically, L2s have functioned as both authorization and settlement networks. However, Hoffman suggests that as Ethereum's roadmap progresses, a specialization will occur. L2s, such as Arbitrum Orbit Rollups and zkSync ZK-Stack chains, are seen as authorization networks that feed into the L1. Each L2 currently operates with its own canonical bridge, providing cryptographically verifiable authorizations that the L1 can process. The existing challenge stems from a "standards sprawl" across various L2 authorization methods, complicating interoperability despite their objective nature.

Dissecting the Interoperability Roadmap

To address the interoperability fragmentation, the Ethereum Foundation (EF) has outlined an ambitious