Ethereum Activates Fusaka Upgrade

TL;DR

• The Ethereum blockchain has activated the Fusaka upgrade.

• This upgrade is set to help Ethereum handle the increasingly large transaction batches coming from the layer-2 networks that settle on top of it.

Fusaka Upgrade Goes Live on Ethereum

The Ethereum network has finally activated the Fusaka upgrade,  marking the blockchain’s second major code change of 2025.

This upgrade is designed to help the blockchain handle the increasingly large transaction batches coming from the layer-2 networks that settle on top of it.

The upgrade was triggered at 21:49 UTC on Wednesday and finalized roughly after 15 minutes. Fusaka combines two hard forks on Ethereum happening in tandem: one on the consensus layer and one on the execution layer. 

The primary feature of this upgrade is PeerDAS, a system that lets validators check small slices of data rather than entire “blobs.” This feature reduces both costs and computational load for validators and layer-2 networks.

The upgrade is also expected to lower the barrier for smaller or newer validator operators by cutting down the resources required to run just a few validators. 

In addition to PeerDAS, 12 other Ethereum Improvement Proposals (EIPs) were included in this upgrade. These include:

• EIP-7642: Removes old, no longer used fields from Ethereum’s networking messages to simplify and clean up the protocol.

• EIP-7823: Puts a maximum limit on how big certain math operations can be so they can’t overload the network.

• EIP-7825: Sets an upper cap on how big a single transaction can be, so no one can include extremely large, resource-heavy transactions.

• EIP-7883: Makes a specific type of math operation more expensive in gas so heavy calculations don’t unfairly strain the network.

• EIP-7892: Allows future upgrades to change only blob-related settings without touching the rest of the protocol, making blob tuning safer and easier.

• EIP-7910: Adds a new API method that lets software easily check what configuration or rules a node is using.

• EIP-7917: Makes the process of predicting who will propose the next blocks more transparent and reliable.

• EIP-7918: Makes sure blob data fees stay aligned with the actual cost of processing them, preventing extreme price swings.

• EIP-7934: Adds a strict size limit to certain block data to stop overly large blocks from slowing down the chain.

• EIP-7935: Raises the default block gas limit to 60 million so the network can fit more computation in each block.

• EIP-7939: Adds a simple new instruction for smart contracts that lets them improve efficiency for some calculations.

• EIP-7951: Adds built-in support for a widely used cryptographic signature type.

Ether is up 5% in the last 24 hours and is currently trading above $3,200 per coin.