Ethereum activated the Fusaka upgrade today, reducing transaction costs on Layer-2 networks by roughly 40 % to 60 %.
Fusaka is live on Ethereum mainnet!
– PeerDAS now unlocks 8x data throughput for rollups
– UX improvements via the R1 curve & pre-confirmatons
– Prep for scaling the L1 with gas limit increase & moreCommunity members will continue to monitor for issues over the next 24 hrs.
— Ethereum (@ethereum) December 3, 2025
The improvement includes the implementation of PeerDAS, which allows validators to verify data through sampling rather than downloading full batches. This significantly lowers bandwidth usage and makes the process more efficient. The network also increases the gas limit per block to 60 million, expanding processing capacity for complex smart contracts on the main chain. As a result, transactions on rollups like Arbitrum, Optimism, or Base can now cost just a few cents instead of the previous $0.10–$0.50 range.
With Fusaka now live, the developer community expects greater adoption of dApps, DeFi, and other on-chain activities thanks to lower fees and improved performance. In the medium term, all eyes are on how quickly Layer-2 networks adopt the new capabilities and whether this leads to real growth in activity and liquidity.
Source: Ethereum on X.
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