Ethereum developers are preparing to launch Fusaka, the second major network upgrade of 2025, affecting both the consensus and execution layers. The package of 12 EIPs is designed to help the base layer handle rising transaction flow from layer-2 networks and make operations faster and cheaper for users.

The key element of Fusaka is PeerDAS, which allows validators to verify only parts of the data instead of full blob packets. This reduces node load, lowers bandwidth requirements, and removes current bottlenecks that slow down and increase the cost of large batches of layer-2 transactions.

The upgrade also introduces targeted improvements to Ethereum itself: adjusting the maximum size of a single transaction for added security and adding optimizations to make smart contracts more efficient. Institutional players, including Fidelity Digital Assets, already view Fusaka as an important step toward a more coherent and sustainable roadmap for the network as infrastructure for scalable layer-2 solutions.