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In a major development for Ethereum, the Platåberget public testnet is now live, marking the next stage of testing for Glamsterdam.
The Ethereum Foundation announced the Platåberget Testnet in a blog post dated August 17 and described it as Glamsterdam's (Gloas + Amsterdam) early testing ground open to public participation.
Platåberget is a short-term testnet designed for testing changes by the community. Unlike the short-lived devnets before it, Platåberget is intended to run for a few months, giving the community a stable place to experiment with post-Glamsterdam Ethereum and an opportunity to test and break things before Glamsterdam goes live on Ethereum's longer-lived testnets, Sepolia and Hoodi.
Platåberget has a relatively small but publicly joinable validator set, which allows anyone to deposit a new validator and test out their validator and builder deposit workflows. The Glamsterdam fork on the testnet is scheduled for August 20, with ePBS, gas repricings, Block-Level Access Lists (BALs), and the new builder API flow among the key areas being tested.
Platåberget will allow the community to experiment with post-Glamsterdam Ethereum and begin identifying issues.
About Glamsterdam upgrade
Ethereum's Glamsterdam upgrade is expected to bring significant changes to both its consensus and execution layers.
A key highlight of the upgrade is Enshrined Proposer-Builder Separation (ePBS), which remains a major change to how blocks are built, proposed, and validated, including a new builder API flow and PTC (payload-timeliness) checks. Infrastructure that depends on the block production and validation pipeline might be affected by this change.
Glamsterdam will add Block-Level Access Lists, which introduce enforced block-level access lists that record accessed state locations and post-transaction changes. BALs are stored separately from the block body and can be exchanged between execution-layer peers through eth/71.
Other changes include gas repricings, which represent a coordinated bundle of gas cost changes aimed at about a 200 million gas floor. Any tooling that hardcodes a maximum gas limit might be affected. Larger contracts and initcode increase the maximum deployed contract size from 24KiB to 64KiB and the maximum initcode size from 48KiB to 128KiB, as well as introduce forward-compatible consensus data structures.
U.Today Editorial Team
Dan Burgin
