

Ethereum's Fusaka Upgrade Nears Mainnet Launch After Successful Testnet Run
Oct 3, 2025
2 min read
Ethereum is on the verge of a significant network enhancement with its upcoming Fusaka upgrade. Following a successful test on the Holesky network, the upgrade is progressing towards a mainnet launch, potentially by the end of November. This development is anticipated to bring substantial improvements in speed, cost-efficiency, and scalability to the Ethereum blockchain, impacting users, developers, and the broader crypto ecosystem.
Key Takeaways
The Fusaka upgrade has successfully passed tests on the Holesky test network.
It aims to significantly improve Ethereum's scalability and reduce transaction costs.
The upgrade is expected to enhance the efficiency of layer-2 solutions like rollups.
A mainnet launch is tentatively scheduled for the end of November.
Fusaka: A Leap Forward for Ethereum
The Fusaka upgrade represents a crucial step in Ethereum's long-term scaling strategy. According to Dankrad Feist, co-lead of the protocol architecture team at the Ethereum Foundation, Fusaka is the culmination of years of research focused on making Ethereum faster and cheaper. The upgrade primarily targets improving data handling, which will directly benefit "rollups" – secondary chains that operate on top of Ethereum. By providing more capacity for these rollups, Fusaka is expected to lead to lower transaction fees and increased throughput for users of platforms like Base, Arbitrum, and Optimism.
Feist likened the potential long-term significance of Fusaka to Ethereum's landmark "Merge" upgrade, which transitioned the network to proof-of-stake. While the Merge focused on sustainability, Fusaka addresses the critical challenge of scaling efficiently and economically. This upgrade is designed to enable the Ethereum network to handle a much larger volume of transactions, potentially achieving a 100x scaling improvement.
Technical Progress and Future Outlook
The recent successful test on the Holesky test network marks a critical milestone for Fusaka. Holesky, launched in 2023, serves as a practice ground for developers, and its configuration closely mirrors Ethereum's mainnet. The successful completion of tests on Holesky, including the implementation of PeerDAS (a feature allowing validators to check only partial data), brings the upgrade closer to its mainnet debut. Following two more scheduled test runs on October 14 and 28, developers will finalize the date for the mainnet launch.
Beyond immediate technical improvements, Fusaka is seen as foundational for Ethereum's future. Experts predict that blockchain technology, powered by upgrades like Fusaka, will become increasingly integrated into everyday financial services, making them accessible to a broader audience. This could lead to Ethereum underpinning a wide range of financial applications, from cross-border payments to lending, and providing services to underserved populations globally. The upgrade positions Ethereum as a core layer for a decentralized "internet of value."
Key Takeaways
Expert Predicts Final Impulse Wave Targeting $18,000 — TradingView News, TradingView.
Ether Price Eyes 145% Gains to $10K as ETF Inflows Return, Cointelegraph.
Why Ethereum’s Fusaka upgrade could be its most important yet, Yahoo.
Ethereum’s Fusaka Upgrade Passes Holesky Test, Moves Closer To Mainnet, CoinDesk.
ETH Eyes 10,000 in 2026 But Remittix Could Top $10 From $0.11, CoinCentral.