The third and final testnet of Ethereum’s Fusaka upgrade is now live.
Ethereum’s long-awaited Fusaka hard fork reached a major milestone on Tuesday with its successful rollout to the Hoodi testnet. This is the final testing phase before mainnet activation later this year.
The test began at approximately 18:53 UTC and completed a three-step simulation process for Ethereum, following initial activations on the Holesky and Sepolia testnets.
Fusaka upgrade
According to the Ethereum Foundation, Fusaka’s mainnet rollout is expected at least 30 days after Hoodi’s activation, with developers tentatively targeting December 3. The main objective behind the upgrade is to enhance Ethereum’s scalability, security, and cost efficiency, building on the foundation laid by April’s Pectra upgrade.
Mr. Fusaka will introduce a series of technical improvements across over a dozen Ethereum Improvement Proposals (EIPs). Topping the list is EIP-7594, or Peer Data Availability Sampling (PeerDAS). This allows validators to validate only a portion of the data rather than the entire “blob”, significantly reducing bandwidth demands and operational costs for validators and Layer 2 networks.
Other proposals, such as EIP 7825 and 7935, adjust gas limits to improve efficiency and prepare the network for parallel execution. Meanwhile, EIP 7939 and 7951 improve performance and zero-knowledge proof support. These upgrades are designed to reduce transaction costs for users and developers while preparing us for the next stage of rollup scaling.
The Ethereum client team confirmed the successful progress of Hoodi after activation. Nethermind said
“Ethereum 𝗛𝗼𝗼𝗱𝗶 𝗙𝗼𝗿𝗸 has completed successfully and is now running seamlessly on 𝗡𝗲𝘁𝗵𝗲𝗿𝗺𝗶𝗻𝗱.” 𝗖𝗹𝗶𝗲𝗻𝘁. Another smooth upgrade and another important milestone on the road to Fusaka. We’d like to thank everyone in the ecosystem who helped make it happen, from client teams to researchers to operators. ”
The road ahead
ConsenSys also said Fusaka will “pave the way for parallel execution” and lay the foundation for future networking advances. The rollout will proceed in stages. Following the mainnet launch scheduled for December 3rd, the blob capacity increase is scheduled to occur on December 17th, and a second hard fork to further expand blob capacity is scheduled for January 7th, 2026.
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Ethereum developers have already shifted their focus to the next upgrade, dubbed “gramsterdam,” which is expected to reduce block times and further enhance scalability. Gramsterdam falls under the “Surge” phase of the network’s roadmap.
On the other hand, the price of ETH remained largely unfazed by the technological development. The altcoin recorded a new drop of almost 3% in the past 24 hours and is currently trading below $4,000.
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