The Ethereum Foundation announced that the $ETH network upgrade, Glamsterdam, will activate on the Sepolia testnet at 21:53:36 on October 6 in UTC+8 (UTC 13:53:36), corresponding to epoch 353024 and slot 11296768. The upgrade merges the execution-layer Amsterdam and consensus-layer Gloas, and mainly introduces built-in proposer-builder separation (ePBS, EIP-7732) and block-level access lists (BALs, EIP-7928): the handoff between proposers and builders is written into the protocol layer, and block-level access lists record account and storage reads and writes to facilitate parallel verification and state-root computation. At the same time, it also adjusts gas pricing related to state creation and access, including EIP-8037 and EIP-8038, to better reflect the costs of execution and state growth.

Sepolia node operators must update their execution-layer and consensus-layer clients before activation; contracts that rely on fixed gas quotas or hard-coded limits may need to be adapted. Activation times for Hoodi and mainnet have not yet been announced, and the foundation said a separate notice will follow. This arrangement covers only Sepolia; mainnet users and $ETH holders do not need to take any action for now.

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