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Ethereum Completes Final Fusaka Test Ahead of Mainnet Hard Fork

Ethereum Completes Final Fusaka Test Ahead of Mainnet Hard Fork

Ethereum developers confirm Fusaka upgrade for December 3, enhancing validator data access after Hoodi test success, marking the second hard fork of 2025.

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Summary

Ethereum developers have finalized plans to activate the Fusaka hard fork on December 3, 2025, after confirming its stability on the Hoodi testnet. The upgrade will enhance validator data access and officially start the countdown to Ethereum’s second hard fork of the year. Fusaka introduces PeerDAS technology, allowing segmented data verification, and will increase the block gas limit fivefold, boosting scalability, network throughput, and operational efficiency.

Terms & Concepts
  • Fusaka Upgrade: An Ethereum hard fork scheduled for December 3, 2025, introducing scalability and efficiency improvements, notably through PeerDAS segmented data validation.
  • PeerDAS: Ethereum’s data validation system letting validators verify partial data rather than full blobs, cutting bandwidth needs and costs for validators and layer‑2 networks.
  • Gas Limit: The maximum amount of computational work or gas that can be included in a single Ethereum block.