The official Ethereum account posted a thread confirming the Fusaka network upgrade is now live on mainnet, marking the latest step in Ethereum’s protocol roadmap and expanding what the network can do at scale. The update is being framed as a capability unlock: more data throughput for rollups, safer ways to raise blob capacity over time, and new protocol plumbing that makes future “instant-feel” user experiences more realistic.
If you missed the details in the social thread, the best reference point is the official breakdown on the Fusaka roadmap page and the upgrade explainers that unpack the EIPs and real-world impacts for builders and users.
Fusaka is a combined upgrade across Ethereum’s two layers of protocol change:
That naming and scope are outlined in the official Fusaka overview, and it matters because some of the biggest scaling improvements sit at the boundary between consensus and data availability.
The core scaling story in Fusaka is Peer Data Availability Sampling (PeerDAS), specified in EIP-7594.
Here’s the simple version:
The Ethereum roadmap describes this as a design that can enable up to an 8x theoretical scale-up in blob throughput while keeping node hardware requirements sane, which is the whole point of scaling the data layer without turning Ethereum into a data-center chain. You can see the official explanation under the PeerDAS section on the Fusaka upgrade page.
Why you should care even if you never run a node:
Alchemy’s developer write-up also frames PeerDAS as a practical step toward deeper sharding-style scaling, and it is one of the reasons many Ethereum watchers treat Fusaka as “infrastructure first” rather than a hype upgrade. See the technical walk-through in Alchemy’s Fusaka EIPs guide.
A subtle but important change in Fusaka is the ability to adjust blob parameters more flexibly via so-called blob-parameter-only forks, defined in EIP-7892.
The practical implication is that Ethereum can raise blob targets and maximums between big upgrades, instead of waiting for the next “everything fork” to ship. The official roadmap calls out why this matters: rollup demand can grow faster than the major upgrade schedule, and blob capacity needs a safer, more frequent adjustment path.
If you are trying to model L2 fee trajectories, this is one of the biggest second-order changes, because it makes blob supply more responsive.
Fusaka is not only about throughput. It also tightens the economics around blobs and execution so the system behaves more predictably.
One widely discussed item is the blob fee market refinement described in Alchemy’s overview of EIP-7918, which anchors blob pricing to execution conditions to avoid “blob gas goes to near-zero forever” outcomes.
That topic is also part of a broader narrative pushed in institutional research: Fidelity Digital Assets argues that Fusaka reflects a more unified focus on scalability, usability, and long-term economic sustainability, including how protocol choices might tie L2 usage more directly to ETH’s revenue story. You can read that framing in their report, The Fusaka Upgrade: Scaling Meets Value Accrual.
The post Ethereum’s Fusaka Upgrade Is Live: What Changed On Mainnet And Why It Matters appeared first on Crypto Adventure.
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