Ethereum has officially completed one of its most meaningful upgrades so far. The Fusaka hard fork went live on December 3, 2025, marking a major step forward in scaling, data efficiency, and overall performance across the Ethereum network.
At NOWNodes, we’ve already updated all our Ethereum nodes, explorers, and infrastructure, so developers and businesses using our services are fully ready for the post-Fusaka mainnet environment.
What is included in Fusaka Upgrade Delivers
Fusaka introduces several important Ethereum Improvement Proposals, improving both the execution layer and the consensus layer. The upgrade builds on the progress made by Dencun, Pectra, and earlier milestones — continuing Ethereum’s long-term path toward better scalability, stronger security, and smoother user experience.
PeerDAS (EIP-7594)
One of the most anticipated parts of the Ethereum Fusaka upgrade is PeerDAS — a new data availability sampling protocol. It dramatically increases throughput and bandwidth for rollups, allowing Layer 2 networks to post more data to Ethereum at a lower cost. This is a major win for Ethereum scaling and a key step in making Layer 2s more efficient and sustainable.
Increased Blob Capacity
Starting with the Dencun upgrade, Ethereum introduced blob data as a way to reduce transaction costs for rollups. Fusaka builds on that foundation. Over the two weeks following activation, the network gradually increased blob capacity to ensure validators and node operators could adjust without risking consensus stability or performance drops.
Strengthened Security
Before Fusaka went live, the Ethereum Foundation completed a four-week audit process with a substantial bounty program. The goal was straightforward: ensure the next hard fork launched safely. With consensus changes, updates to blob fee mechanics, and node-level improvements included in Fusaka, careful testing was essential.
Where Fusaka Fits in Ethereum’s Roadmap
To understand Fusaka’s role in Ethereum’s evolution, it helps to look at recent upgrades. The Merge in 2022 moved Ethereum to proof-of-stake. Dencun in 2024 brought blob data and a new era for Layer 2 rollups. Pectra refined execution and consensus mechanics. Fusaka continues this story with a major focus on data availability and scaling.
And this isn’t the end. The community is already looking ahead to upgrades beyond Fusaka, including Glamsterdam, which is expected to push efficiency even further. Ethereum’s roadmap continues to evolve, but each fork brings the network closer to supporting a global user base at scale.
Why Fusaka Node Matters for Users, Developers, and the Ethereum Ecosystem
Even though the terms can sound technical — block gas limit, data availability sampling, EIPs — the impact is straightforward.
Transactions on Layer 2 should become cheaper and faster. Rollups gain more bandwidth and flexibility. Applications built on Ethereum can scale more naturally, whether they’re in DeFi, gaming, enterprise, or consumer-level use cases.
Validators and node operators also benefit from improved data handling. By distributing blob data more efficiently, Ethereum reduces the strain on single nodes and creates a more resilient consensus layer.
Developers, meanwhile, get a more capable EVM environment with higher data capacity, better UX, and a more predictable structure for execution and transaction gas. Altogether, this makes building on Ethereum — and scaling apps to millions of users — much more accessible.
NOWNodes: Fully Ready for the Fusaka Era
For us at NOWNodes, the Fusaka hard fork isn’t just another protocol upgrade. It’s a sign of how quickly the Ethereum ecosystem is moving, and how committed the community is to improving the network without compromising its core principles.
Our nodes and infrastructure now fully support the Fusaka upgrade, ensuring seamless access to the Ethereum mainnet, accurate explorer data, and stable performance across all services. Whether you’re running a validator, deploying a smart contract, or connecting your app to Ethereum, our infrastructure is ready for the next chapter of the network.
Beyond Fusaka Consensus Layer
Ethereum continues to evolve through major upgrades, and Fusaka is one of the most important steps the network has taken since the Merge. It strengthens Ethereum’s ability to scale, improves data availability, and makes Layer 2 ecosystems more robust than ever.
As the network grows and new forks appear on the Ethereum roadmap, NOWNodes will keep providing reliable infrastructure so builders can stay focused on what matters most — creating the next generation of blockchain applications.
