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– Etherium has smoothly rolled out the Fusaka upgrade, making significant improvements for Tier 2 scaling.

PeerDAS enables validators to validate only small pieces of data, thereby reducing costs and congestion.

The update includes 12 additional EIPs and demonstrates Etherium’s commitment to a more scalable and performant core network.

Efirium just made its second major upgrade for 2025, activating the long-awaited Fusaka hardfork on Wednesday – and it did so flawlessly. The upgrade completed about 15 minutes after activation at 21:49 UTC, and core developers celebrated the event live on the EthStaker broadcast. Fusaka isn’t just a minor tweak; it’s a concerted, dual upgrade to the execution and consensus layer of Etherium, aimed at removing one of the biggest obstacles in the chain: the colossal amounts of information coming from layer 2 networks.

The cornerstone of Fusaka is PeerDAS, a mechanism designed to help Etherium scale by overhauling the way validators process data. Currently, Layer 2 networks send their transactions to Etherium in blocks, and validators have to download and verify the entire block in its entirety. This is slow, resource-intensive and expensive, especially as tier 2 networks like Base, Arbitrum and Optimism are growing at an unprecedented rate.

PeerDAS is a game changer. Instead of each validator inspecting the entire packet, they only look at a small fraction of the data, dramatically reducing the computational load. By reducing bandwidth requirements and processing costs, the entire network can handle larger L2 files, minimizing congestion and reducing the cost of blob transactions.

Smaller validator operators will benefit the most, as they no longer need top-of-the-line equipment to stay on pace. Large institutional validators will not see such dramatic improvements, but the ecosystem as a whole will become lighter and more accessible.

Ephirium has a reputation for having long development cycles, but Fusaka developed surprisingly quickly. The developers deliberately excluded all features that could cause delays. As Gabriel Trintinalia of Consensys explained, PeerDAS was deemed too important to delay, so complex or time-consuming additions were pushed to later upgrades.

The gradual rollout was intentional. As lead developer Marius Van Der Weyden noted, network bandwidth won’t increase immediately – it will slowly build up over the next few months, providing stability while Etherium learns the new system.

The traditional finance sector is watching closely. Fidelity Digital Assets recently called Fusaka a “key step” toward a more holistic and modular future for Efirium, reflecting the growing institutional interest in the long-term scalability of ETH. With this update, Etherium is moving closer to a vision where L2s take the brunt of the load and the Core Network remains secure, responsive and cost-effective.

What else is included in Fusaka?

While PeerDAS is the centerpiece of the update, Fusaka includes 12 more Eifirium Improvement Proposals (EIPs) focused on developer tools, network stability, and incremental efficiency improvements. These small modifications support a common goal: to improve Efirium today, while laying the foundation for larger transformations in the future.