Ethereum completes the final BPO fork of the Fusaka upgrade, further enhancing data availability limits

CoinVoice · 2026-01-08T01:12:53+00:00

Ethereum developers completed the final "Blob Parameters Only" fork of the Fusaka upgrade, increasing the target number and cap of blobs in a block. This update aims to enhance network data availability, with phased adjustments to key parameters to support low-cost data storage for Layer 2 Rollups and stabilize transaction costs.

CoinVoice

2026-01-08 01:12:53

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CoinVoice has learned that Ethereum developers have completed the second and final “Blob Parameters Only (BPO)” fork planned during the Fusaka upgrade cycle. This update increases the target number of blobs per block from 10 to 14, and the upper limit from 15 to 21, aiming to further enhance the network’s data availability capabilities.

Officially, the BPO mechanism allows Ethereum to independently adjust key parameters such as blobs in a phased manner without waiting for large annual upgrades, thereby testing and releasing network capacity in a more controlled way. Blobs were initially introduced in the 2024 Dencun upgrade to provide low-cost data storage for Layer 2 Rollups. This data is automatically cleared after approximately 18 days on the mainnet.

This adjustment is seen as the final step of the Fusaka upgrade. Developers note that as the upper limit of blobs per block gradually increases, Ethereum can provide more data space for Layer 2 networks, helping to maintain stable transaction costs for Rollups amid growing on-chain activity.

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