Ethereum’s Fusaka upgrade launched on the Hoodi testnet.

crypthub

1 day ago

Fusaka Testnet Deployment

The Fusaka upgrade was activated on the Hoodi testnet at 18:53 UTC on Tuesday, marking the final testnet trial before mainnet. Earlier this month it passed the Holesky and Sepolia testnets, completing three testnet deployments in 2025. The Ethereum Foundation expects the mainnet rollout at least 30 days after Hoodi testing.

Mainnet Launch and Key Improvements

Fusaka is slated for a December 3 mainnet activation, introducing a dozen EIPs that boost scalability, security and cost efficiency. The block gas limit will rise from 30 million to 150 million units, and blob capacity will expand. Notable features include EIP‑7594’s Peer Data Availability Sampling, allowing validators to verify large data sets by sampling rather than full downloads.

Community Coordination and Future Roadmap

An audit contest from September 15 to October 13 offered up to $2 million in rewards to uncover bugs before the mainnet fork. Ethereum leaders urged teams to focus on Fusaka and postpone discussions of the next upgrade, Glamsterdam, scheduled for early 2026. Glamsterdam will target faster block times, proposer‑builder separation and the full EVM Object Format.