ETH’s Fusaka Upgrade to Activate EIP-7825 in December
ETH is preparing to launch the Fusaka upgrade on mainnet in ahead December 2025, introducing EIP-7825, a proposal that sets a per-transaction gas limit cap of approximately 16.78 million gas units. This update is designed to enhance block efficiency, prevent network congestion caused by large transactions, and pave the way for future parallel execution frameworks. The Fusaka upgrade marks ETH’s next step in scaling its base layer while maintaining decentralization and reliability.
According to the ETH Foundation’s latest test reports, the Fusaka upgrade has been successfully deployed on the Holesky and Sepolia testnets, with mainnet activation expected on December 3. Developers are confident that the update will improve the performance of the network and prepare it for more advanced scalability answers in 2026. In addition to EIP-7825, the Fusaka fork will implement around 11 ETH Improvement Proposals (EIPs), including EIP-7594, also known as PeerDAS, which introduces a new model for distributed data availability.
Enhanced block efficiency and network reliability
EIP-7825 directly targets inefficiencies associated with gas-heavy transactions. By enforcing a hard cap of roughly 16.78 million gas per transaction, ETH aims to prevent a single transaction from consuming an excessive share of a block’s gas capacity. This mechanism assists ensure more balanced gas allocation and smoother transaction processing across the network.
For most ETH users, the change will not affect everyday activity, as typical transactions use significantly less gas than the new limit. However, smart contract developers and DeFi protocols that rely on batch transactions or complex operations may need to refactor their code to remain compliant. Block confirmers and infrastructure providers will also benefit from improved block-packing efficiency, which reduces strain on nodes and enhances synchronization times.
Laying the foundation for ETH’s next evolution
The Fusaka upgrade represents more than just a technical improvement; it signals ETH’s ongoing shift toward modular scalability and future execution-layer enhancements. EIP-7825 and related proposals are viewed as essential building blocks for parallel transaction processing—an anticipated development that could significantly increase ETH’s throughput and lower latency.
By improving efficiency and stability at the base layer, Fusaka strengthens ETH’s position as the leading smart contract platform for decentralized finance (DeFi), gaming, and enterprise applications. Analysts believe the update could enhance ETH’s long-term competitiveness against emerging high-performance blockchains, while also improving developer confidence in the network’s scalability roadmap.
As the mainnet activation date approaches, industry participants are preparing for one of ETH’s most impactful upgrades since Dencun. With the introduction of EIP-7825, ETH continues to address scalability challenges head-on, combining technical rigor with forward-looking innovation.
The Fusaka upgrade underscores ETH’s commitment to secure, decentralized scaling—laying the groundwork for future growth in the on-chain economy. Once activated, the update will further optimize transaction flow, improve reliability, and strengthen ETH’s foundation for the next generation of blockchain innovation.
