Ethereum Developers Prep for Fusaka, Second Upgrade of 2025

Tech Share Share this article Copy link X icon X (Twitter) LinkedIn Facebook Email Ethereum Developers Prep for Fusaka, Second Upgrade of 2025 The goal of the upgrade is to enable Ethereum to handle the large transaction throughput from the layer-2 chains that use the blockchain as their base layer. By Margaux Nijkerk | Edited by Cheyenne Ligon Nov 30, 2025, 2:00 p.m. What to know : Ethereum developers are preparing for the network’s second upgrade of 2025 to go live on the blockchain’s mainnet on Wednesday. Fusaka — a blend of the names Fulu + Osaka — consists of two upgrades happening on Ethereum’s consensus and execution layers at the same time. The goal of the upgrade is to enable Ethereum to handle the large transaction throughput from the layer-2 chains that use the blockchain as their base layer. Ethereum developers are preparing for the network’s second upgrade of 2025 to go live on the blockchain’s mainnet on Wednesday. STORY CONTINUES BELOW Don't miss another story. Subscribe to the The Protocol Newsletter today . See all newsletters Sign me up By signing up, you will receive emails about CoinDesk products and you agree to our terms of use and privacy policy . Fusaka – a blend of the names Fulu + Osaka – consists of two upgrades happening on Ethereum’s consensus and execution layers at the same time. The goal of the upgrade is to enable Ethereum to handle the large transaction throughput from the layer-2 chains that use the blockchain as their base layer. Fusaka consists of 12 code changes, also known as “Ethereum Improvement Proposals” (EIPs) that will make the layer-2 experience faster and cheaper. The biggest change in Fusaka is known as PeerDAS, which allows validators to check only segments of data instead of full “blobs,” easing bandwidth demands and lowering expenses for both validators and layer-2 networks. Layer 2s currently submit thousands of transactions to Ethereum via “blobs,” where validators currently on the Ethereum blockchain have to download all of the transaction data from the blob to verify it is accurate, creating bottlenecks. With this improvement, those validators will only need to verify a fraction of a blob, speeding up the process and lowering the transaction fees that come with it. Fusaka doesn’t only improve the layer-2 experience, but has improvements that also affect Ethereum itself, though they are much more minor. Changes include the maximum size of a single transaction, aimed to enhance security, as well as some new code aimed at making smart contracts more efficient. Institutions are also increasingly paying attention to this upgrade. Earlier this month, Fidelity Digital Assets released a report saying that Fusaka is a decisive shift toward a more strategically aligned and economically coherent roadmap. Read more: Ethereum Developers Lock In Fusaka Upgrade for Dec. 3 With PeerDAS Rollout Ethereum News Upgrade Fusaka layer 2 Fidelity More For You Protocol Research: GoPlus Security By CoinDesk Research Nov 14, 2025 Commissioned by GoPlus What to know : As of October 2025, GoPlus has generated $4.7M in total revenue across its product lines. The GoPlus App is the primary revenue driver, contributing $2.5M (approx. 53%), followed by the SafeToken Protocol at $1.7M. GoPlus Intelligence's Token Security API averaged 717 million monthly calls year-to-date in 2025 , with a peak of nearly 1 billion calls in February 2025. Total blockchain-level requests, including transaction simulations, averaged an additional 350 million per month. Since its January 2025 launch , the $GPS token has registered over $5B in total spot volume and $10B in derivatives volume in 2025. Monthly spot volume peaked in March 2025 at over $1.1B , while derivatives volume peaked the same month at over $4B. View Full Report More For You The Protocol: Monad Airdrop + Blockchain Go Live By Margaux Nijkerk | Edited by Jamie Crawley Nov 26, 2025 Also: Celestia’s Matcha Upgrade, Fidelity on Fusaka and World’s New Payroll Pilot. What to know : This article is featured in the latest issue of The Protocol , our weekly newsletter exploring the tech behind crypto, one block at a time. Sign up here to get it in your inbox every Wednesday. 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