Ethereum’s Fusaka Upgrade Reaches Final Testnet – Mainnet Launch Locked for December 3rd

The third and final testnet for Ethereum’s Fusaka upgrade goes live.

Ethereum’s long-awaited Fusaka hard fork reached a major milestone on Tuesday with a successful deployment to the Hoodi testnet – the final phase of testing before the mainnet was activated later this year.

The test, which went live around 18:53 UTC, completed Ethereum’s three-phase simulation process after previous activations on the Holesky and Sepolia testnets.

Facial upgrade

According to the Ethereum Foundation, Fusaka’s mainnet rollout is expected at least 30 days after Hoodi’s activation, while developers are tentatively targeting December 3. The main goal behind the upgrade is to strengthen Ethereum’s scalability, security, and cost-efficiency, building on the foundation laid by April’s Pectra upgrade.

Fusaka is introducing a series of technical improvements that include more than a dozen Ethereum Improvement Proposals (EIPs). Topping the list is EIP-7594, or Peer Data Availability Sampling (PeerDAS), which allows validators to verify only parts of the data, rather than entire blobs, significantly reducing bandwidth requirements and operational costs for validators and Layer 2 networks.

Other proposals, such as EIPs 7825 and 7935, will adjust throttle limits to improve efficiency and prepare the network for parallel execution, while EIPs 7939 and 7951 improve performance and support zero-knowledge proofing. These upgrades are designed to reduce transaction costs for users and developers while paving the way for the next phase of rollup scaling.

Ethereum customer teams confirmed smooth progress after Hoodi activation. Hider declared

“The Ethereum 𝗛𝗼𝗼𝗱𝗶 𝗙𝗼𝗿𝗸 has been successfully completed and is now running seamlessly on the 𝗡𝗲𝘁𝗵𝗲𝗿𝗺𝗶𝗻𝗱 𝗖𝗹𝗶𝗲𝗻𝘁. Another smooth upgrade, another important milestone on the road to Fusaka. Thank you to everyone in the ecosystem who helped make this possible – from customer teams to researchers and operators.”

Way forward

Consensys too said that Fusaka “paves the way for parallel execution” and lays the foundation for future network developments. The rollout will be phased. Following the mainnet launch, scheduled for December 3, blob capacity is expected to increase on December 17, while a second hard fork to further expand blob capacity is scheduled for January 7, 2026.

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Ethereum developers have already shifted their focus to the next upgrade, dubbed “Glamsterdam,” which is expected to introduce faster block times and further scalability improvements. Glamsterdam falls under the “Surge” phase of the network’s roadmap.

Meanwhile, the price of ETH remained relatively unaffected by the technical development. The altcoin recorded a new decline of almost 3% in the past 24 hours and is currently trading below $4,000.