Ethereum Network Takes a Significant Step Ahead of the Upcoming Fusaka Upgrade! Here Are the Details

The Ethereum network has taken a significant technical step ahead of the upcoming Fusaka upgrade, increasing the data capacity it can handle per block.

With the update implemented on Tuesday, Ethereum increased the target capacity for data packets, called “blobs,” from 10 to 14, and the maximum blob limit from 15 to 21. Although this change may seem small, it is considered a critical development for Ethereum’s rollup-focused scaling strategy.

Blobs stand out as data packets that allow rollup solutions to perform transactions off-chain at a lower cost, while relying on the Ethereum mainnet for security and finality.

For Layer 2 networks such as Base, Arbitrum, Optimism, and Mantle, as well as zero-knowledge (ZK) rollups like zkSync Era, StarkNet, and Scroll, blob size is a key factor directly impacting transaction costs.

Rollup fees can increase rapidly during periods of limited blob capacity. Conversely, expanding capacity provides greater flexibility for Layer 2 networks, resulting in more stable transaction fees for users.

On-chain data shows that blob usage is currently well below capacity and there is no congestion on the system. This indicates that Ethereum is proactively scaling before congestion occurs.

This update also reflects a broader approach in Ethereum’s roadmap. The network now aims to achieve scalability by gradually adjusting parameters such as data availability and transaction throughput, rather than through large, infrequent hard forks. Ethereum co-founder Vitalik Buterin recently stated that the network has entered a new era where it can achieve higher bandwidth while maintaining decentralization.