Ethereum developers have activated the Fusaka hard fork in the Hoodi test network, marking the final stage of testing before the major upgrade to the main network.
This is reported by Business • Media
Fusaka: The Final Step Before Mainnet Implementation
On October 28, 2025, the Fusaka hard fork was successfully launched in the Hoodi test network. This stage is the final phase of preparation for the upgrade, which, according to the developers’ plans, is set to take place in early December. Hoodi has become the third and final test network where Fusaka has been activated, following Holesky and Sepolia. Representatives from the Ethereum Foundation emphasized that the implementation of the upgrade on the main network is planned no earlier than 30 days after testing in Hoodi.
The launch date for Fusaka on the mainnet is expected to be set for December 3, 2025, in accordance with the developers’ announced schedule.
Key Innovations of Fusaka and the Audit Program
The Fusaka update introduces a set of changes aimed at enhancing the scalability, efficiency, and security of the Ethereum network. Among the main improvements are an increase in gas limits, expanded capacity for storing blob data, and upgrades to node protection mechanisms.
The key technical innovation will be EIP-7594, which implements the PeerDAS (Peer Data Availability Sampling) technology. With this technology, validators will be able to verify only parts of the data instead of complete blob objects. This will significantly improve data availability for layer two solutions and reduce the load on the network.
“Fusaka is considered an important step towards the further growth of the Ethereum ecosystem. The update aims to enhance the infrastructure for scaling L2 solutions and increase the network’s resilience to overloads.”
To ensure maximum security before the main release, the Ethereum Foundation has launched a special audit program for Fusaka. Under this initiative, security researchers can earn rewards of up to $2 million for identifying vulnerabilities before the update is implemented on the main network.
It is worth noting that Fusaka follows the Pectra hard fork, which was activated six months ago. The development team is already working on planning the next major upgrade, codenamed Glamsterdam. The focus of the upcoming upgrade will be on accelerating block processing and optimizing the EVM virtual machine.
Recently, one of the key Ethereum developers criticized Vitalik Buterin and the Ethereum Foundation for centralizing influence.