Ethereum’s Fusaka Upgrade: PeerDAS, Massive Scaling, and Cheaper Layer 2—A New Era Begins

Dramatic gains in network scalability and efficiency come with the Ethereum Fusaka update, which goes live on December 3, 2025. Using decentralized sampling and erasure coding, which lowers bandwidth and storage overhead by up to 85% and raises data throughput ninefold, the central PeerDAS (EIP-7594) lets nodes securely check data availability. Block gas limits have increased from 45 million to 150 million, and L2 rollup blob capacity has eightfold risen, thereby preparing the way for large rises in contract and transaction capacity as well as significantly lower L2 charges.

Ensuring resilience and security, the rollout followed exhaustive testing across all the main testnets as well as a large bug bounty. Aside from other backdrop upgrades like biometric transaction signing and better DoS protection, Ethereum's second hard fork in 2025 causes no disturbance to current contracts or dApp activities.

Importantly, Fusaka is regarded as a fundamental improvement for Ethereum's Layer 2 environment. It brightens the possibilities for projects like the Optimism Superchain, cuts node expenses, and speeds transactions. Increased network activity could result in more ETH burn rates and a reduced supply, therefore strengthening Ethereum's long-term expansion and scalability in readiness for forthcoming upgrades such Glamsterdam.