Ethereum’s Fusaka Upgrade Goes Live: PeerDAS, Turbocharged Security & 10x Faster Transactions Hit Mainnet

Ethereum just leveled up—hard. The Fusaka upgrade is now live, delivering its promised trifecta of scalability, security, and speed.

PeerDAS: The Scaling Breakthrough
No more bottlenecked rollups. PeerDAS slashes data availability costs by 90%, finally making L2s economically viable for mass adoption.

Fort Knox Mode Activated
New security limits nuke attack vectors that plagued DeFi summer—frontrunning bots just got 75% less profitable overnight.

Transactions That Don't Feel Like Watching Paint Dry
With latency cut to sub-2 seconds, even your grandma could now use Ethereum without complaining. (Though she'll still whine about gas fees.)

The upgrade went smoother than a Vitalik TED talk—which is more than we can say for most TradFi infrastructure 'modernizations'.

Ethereum announced that its December Fusaka upgrade is a major step in its ongoing roadmap, strengthening the network’s ability to scale while maintaining decentralization.

This upgrade, combining the Osaka execution LAYER and the Fulu consensus layer, follows the Pectra release and will bring essential improvements in efficiency, security, and user experience.

December’s Fusaka upgrade is a major step in Ethereum's roadmap.

It's proof that ethereum can evolve responsibly, scaling to meet global demand without compromising decentralization.

Learn how Fusaka will unlock the next wave of growth: https://t.co/3TOda5KjY2 pic.twitter.com/jjckxKB28H

The Fusaka upgrade will introduce groundbreaking changes to how Ethereum handles data. The most notable feature, PeerDAS (Peer Data Availability Sampling), will redefine the way nodes store data.

Currently, every node must store all blob data from Layer 2 networks, but with PeerDAS, each node will only store a fraction, about one-eighth, of the total data. This allows Ethereum to scale up to eight times more efficiently while maintaining integrity and reliability.

This change ensures that data remains available and verifiable even if only half the nodes are online. It will significantly reduce hardware strain, lower costs for Layer 2 networks, and create a more sustainable structure for Ethereum’s expanding ecosystem.

Blob-Parameter-Only Forks Enable Flexible Upgrades

The developers of the network have also implemented a system called “Blob-Parameter-Only Forks.” It enables modifications to the number of blobs, which are essentially the units of measurement that layer 2s use to submit data, independently of a network upgrade.

Before, the network required synchronized updates among all nodes and clients, which involved complex processes. Currently, this configuration can be changed between major updates, making it easier to react to network requirements.

There are other areas, including security optimization, which are central to EIP-7823. The inputs allowed in an operation, specifically MODEXP, will have strict sizes mandated by EIP-7823, which will eliminate large operation sizes that are capable of compromising clients. The transaction gas limit will now be fixed at 16,777,216 gas.

Further, a ceiling on block size of 10 MiB will ensure smooth propagation and avoid network congestion. Altogether, this will bring a SAFE and predictable network space, absolutely required for the future development and sustainability of Ethereum.

Fusaka Upgrade Enhances Ethereum Network

Additionally, the Fusaka upgrade comes with a number of innovations aimed at making interactions between users and developers easier.

EIP-7917 will bring the future block proposers to the attention of the Beacon Chain, making transactions predictable and allowing quick preconfirmations. The “Count Leading Zeros” opcode will simplify complicated calculations, making contracts more efficient.

Additionally, the network will bring secp256r1, a cryptographic curve commonly used by secure authentication systems, including Apple Secure Enclave and FIDO2, directly to the Ethereum network. Adding this will allow users to log in through passkey and make wallet security easier.