Ethereum Core Developers Confirm Pectra Testnet Forks on Holesky, Sepolia

The Holesky testnet fork is set for February 24 at Epoch 115,968, followed by Sepolia on March 5 at Epoch 222,464, with a March 6 developers’ call to finalize the mainnet activation date, tentatively slated for late April pending testnet results. Client teams, including Lighthouse, Teku, Grandine, and Besu, affirmed readiness for testnet releases by February 14, per the ACDE highlights summary.

X post from Ethereum Core Developer Tim Beiko.

However, unresolved deployments of system contracts for EIP-2935, EIP-7002, and EIP-7251 required urgent attention to avoid delays. Developers prioritized finalizing these contracts ahead of the next testing call, hoping to ensure seamless integration into the testnet forks. The Ethereum Foundation (EF) plans to publish a blog summary post-release to guide node operators and validators through the upgrade.

The ACDE report highlighted the growing focus on Fusaka, Ethereum’s next hard fork, with a March 13 deadline for Proposed for Inclusion (PFI) submissions. High-priority EIPs under review include Ethereum Object Format (EOF), encrypted Proposer-Builder Separation (ePBS), and transaction indexing upgrades. A debate emerged over stricter testing mandates for EIPs, requiring pull requests against execution layer specifications at key stages.

While some developers argued this could burden teams, a compromise allowed draft PRs at early stages to balance rigor and flexibility. Fusaka’s scope must be finalized by April 10 to align with post-Pectra development. Progress on EOF implementation, a cornerstone of Fusaka, advanced with the first testnet deploying Pectra-compatible specifications. The ACDE highlighted that discussions continue around potential adjustments, such as deprecating legacy contract creation transactions and adding metadata sections to EOF containers.

Geth developers raised concerns about EOF’s complexity, underscoring ongoing debates over feature prioritization. The Max Blob Flag proposal, aimed at letting validators limit data blob processing to manage resource constraints, also drew mixed feedback. While supported by most execution layer clients, Erigon expressed reservations, citing potential impacts on rollup performance and smaller validators’ economic viability. Further testing will evaluate trade-offs between scalability and network decentralization.

The All Core Developers Execution call summary concluded with reminders for client teams to adhere to deadlines and community stakeholders to review testnet documentation. With Pectra’s mainnet activation nearing, developers emphasized rigorous testing to mitigate risks, reflecting lessons from prior upgrades. The Ethereum Foundation will publish detailed guidelines as the network approaches its next evolution.

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