Ethereum Foundation warns Glamsterdam upgrade may break tools

Ethereum Foundation warned developers on March 24 that tools may break when the Glamsterdam upgrade’s new gas model hits Ethereum’s mainnet and other testnets. The warning comes after the Foundation’s announcement that the upgrade will go live on the mainnet in early June, and that a testnet called Plataberget will be available for early testing.

The Glamsterdam upgrade is part of Ethereum’s long‑term plan to cut transaction costs and improve scalability. It changes how gas prices are calculated and introduces a new fee structure that could affect how wallets, exchanges and smart‑contract tools estimate costs. The upgrade follows earlier changes such as Berlin and London, each of which required developers to update their code to keep pace with new network rules. Because many dApps rely on the old fee model, a sudden switch could cause transactions to fail or cost more than expected.

Developers are urged to run their code on Plataberget, a public testnet that mirrors the mainnet’s new gas rules. The Foundation says the testnet will be available until the mainnet launch, giving developers a window of several weeks to identify and fix any incompatibilities. Community forums and Discord channels have already seen a spike in activity as teams run tests, report bugs and share fixes. Some major wallets have already announced they will be updating their fee‑estimation logic before the upgrade.

Once the upgrade goes live on mainnet, users may notice a drop in average gas fees, but they will also need to ensure their tools are compatible. The Ethereum Foundation’s guidance aims to minimise disruptions and keep the network running smoothly. Developers who ignore the warning risk losing transaction throughput or facing higher costs, which could hurt the user experience and confidence in the platform. The next steps for the community are to complete testing on Plataberget, submit any patches to the Ethereum Improvement Proposal process, and monitor the upgrade’s rollout on June 3.