EEZ Batches Were Included in External MEV-Boost Blocks in First Month

Every Ethereum Economic Zone (EEZ) batch was included in an externally built MEV-Boost block during the system’s first month, enabling same-block calls across connected chains while making access dependent on block builders.

Titan-built blocks carried 56% of EEZ batches. Titan’s usual share of overall Ethereum block production was 48%. About 7% of Ethereum blocks are built by validators themselves, and synchronous calls do not occur in those slots.

EEZ is a set of Ethereum contracts and participation rules that connects chains without creating a new chain or software stack. A connected rollup can call contracts and use liquidity on Ethereum mainnet or another participating chain in the same block. Each chain keeps control of its virtual machine, transaction order and admission rules.

To join, a chain must prove its updated state within one Ethereum slot, which lasts 12 seconds, and roll back when Ethereum reorganizes. This prevents it from retaining state based on a version of Ethereum’s history that has been discarded.

Cross-chain calls use proxy addresses calculated with CREATE2 from the EEZ contract address, the original contract address and the chain ID. Before block assembly, a composer simulates the proposed transaction across the involved chains. The execution table holds each call’s answer, Rollup state roots from before and after calls, callbacks to Ethereum and a rolling hash. A proof covers the table, and the builder must include the complete bundle or omit it. If actual Ethereum execution differs from the simulation, the operations on Ethereum and the rollup revert.

The design has a trade-off among fast block times, synchronous calls to Ethereum and decentralized sequencing: a connected chain cannot have all three and must choose two. The composer also needs to see unencrypted transactions before assembly, giving it and the builder visibility into potential MEV.

For a chain to connect, its onboarding rules must also specify which proof systems it accepts.

Simon Yoon

Simon Yoon reports on blockchain technology for TokenPost. Send corrections or tips to [email protected].