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Ethereum testnet extends critical payload timing for Glamsterdam upgrade

Ethereum operators can rehearse the Glamsterdam client and builder changes on Platåberget, which launched Aug. 13 and is expected to stay up until the upgrade reaches mainnet.

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Ethereum node operators now have a public, permissionless network to rehearse the Glamsterdam upgrade’s execution- and consensus-client changes, with Platåberget launched Aug. 13 and expected to remain available until Glamsterdam reaches mainnet, according to CryptoSlate.

The rehearsal environment, powered by an open validator set, is designed to test whether client pairs, validators, builders, and supporting infrastructure continue to work together as roles shift between the execution client, which processes transactions, and the consensus client, which tracks validators and agrees on the chain.

Ethereum says the biggest architectural change for Glamsterdam is EIP-7732, enshrined proposer-builder separation, which expands the roughly two-second critical path. In the updated design, the next proposer gets six seconds to validate a payload, while other validators get nine seconds, alongside new testing needs for builder onboarding, payload timeliness, and fork-choice behavior under load.

CryptoSlate also notes that Glamsterdam includes Review-stage EIP-7928, which adds block-level access lists to record the accounts and storage locations touched by a block to support parallel work. Additional EIPs listed as scheduled for testing include EIP-2780, EIP-8037, and EIP-8038, all still in Review, with the public page showing an 18,000-gas example for a plain ETH transfer.

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