Ethereum core developers announced that the Fusaka upgrade will go live on December 3, following successful testnet deployments in October. This upgrade aims to enhance scalability and reduce costs by introducing Peer Data Availability Sampling (PeerDAS), allowing nodes to verify parts of large data blobs, thereby reducing bandwidth strain and improving layer-2 rollup efficiency. Additionally, the Ethereum Foundation initiated a $2 million Fusaka audit to identify any vulnerabilities before the mainnet launch. The upgrade also includes Blob Parameter Only (BPO) forks; the first will increase maximum blob counts from 9 to 15 around December 17, and the second will elevate the count to 21 by January 7, 2026. These modifications intend to ease the current capacity limitations faced by major rollups, which have demonstrated over 90% blob utilization. The upgrade is anticipated to significantly enhance Ethereum's throughput without imposing high costs on rollups, as discussions in the All Core Developers Consensus Call have confirmed the timeline and readiness for the upgrade.

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