Ethereum is set to undergo its next upgrade on December 3rd, 2025 at 21:49pm UTC (slot 13,164,544), dubbed the “Fusaka” hard fork. Fusaka combines the execution-layer upgrade Osaka and the consensus-layer upgrade Fulu, following the naming conventions of past forks. Following Pectra in May, Fusaka marks a significant step in Ethereum’s scaling roadmap, enhancing Layer-1 performance, expanding blob capacity, improving rollup cost-efficiency, and delivering UX upgrades. It also introduces Blob Parameter Only (BPO) forks, a mechanism for safely increasing blob capacity as rollup demand grows. Earlier this year, the ... (full story)