Ethereum wants home validators to verify proofs but a 12 GPU reality raises a new threat

Ethereum is undergoing a fundamental shift where validators may verify zero-knowledge execution proofs instead of re-executing every transaction, aiming to make Layer-1 throughput scalable while keeping verification cheap for home validators. This is detailed in EIP-8025 ("Optional Execution Proofs"), which remains backward compatible. This shift relies heavily on Enshrined Proposer-Builder Separation (ePBS) to extend the proving window from 1-2 seconds to 6-9 seconds, making real-time proving feasible. However, a major concern is centralization, as current estimates suggest generating a proof for a full block requires roughly 12 GPUs and seven seconds. This could trade the current constraint of running a full execution client for a new one where proving concentrates in specialized networks. The design attempts to mitigate this by requiring verification against multiple independent proofs (e.g., three out of five). If successful, this decouples execution complexity from validation cost, allowing for higher gas limits and potentially making Layer-1 a high-throughput settlement layer, forcing Layer-2s to differentiate based on specialization rather than just scaling. The path forward depends on standardizing execution witnesses, integrating with the consensus layer, and the successful delivery of ePBS in the upcoming Glamsterdam hardfork.

(Source：CryptoSlate)