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Ethereum’s Glamsterdam Enters Final Development Phase

Developers are running private devnets with the full EIP package to validate protocol changes that aim to cut block-building manipulation and speed execution before public testnets.

Overview

  • Mid-June developers moved Glamsterdam into final devnets that include every planned EIP, a step core maintainer Parithosh Jayanthi called the last phase before hardening and public testnets.
  • Enshrined Proposer-Builder Separation (EIP-7732) will put the split between block builders and block proposers on-chain to reduce reliance on off-chain relays and lower opportunities for maximal extractable value manipulation.
  • Block-Level Access Lists (EIP-7928) let blocks declare which accounts and contract data they will touch so nodes can preload state and run execution more quickly and in parallel.
  • A wide gas repricing will make high-level computation cheaper and persistent state storage more expensive, a change that could push developers to redesign contracts and that will require validators and node operators to upgrade client software.
  • If devnets remain stable the next steps are public testnets, client hardening and community outreach with no fixed activation date yet and an expected mainnet launch in the second half of 2026 if clients and testnets are ready.