Rollup X, a testnet developed by Gnosis and ZisK under the Ethereum Economic Zone (EEZ) initiative, ran its first public demonstrations at Devcon 8 in Mumbai on November 4, according to COINOTAG. The demonstration showcased a 91% reduction in gas costs for cross-network transactions involving Ethereum (ETH).

Testnet Status: Mainnet Integration Still Pending

Despite the results presented, the project remains squarely at the testnet stage. Production integration for the Ethereum (ETH) mainnet has not begun — the original report notes that it "still waits on independent…", with the published excerpt cut off at that point. No timeline for a mainnet rollout was included in the available material. For readers tracking the project, the observable markers from here are the completion of the independent step the report references and the appearance of a stated mainnet timeline — until either arrives, the 91% figure stands as a testnet demonstration result rather than a live-network one.

What the 91% Figure Refers To

On Ethereum, "gas" is the unit measuring the computational work required for transactions and smart-contract operations, and gas fees are the prices users pay for that work. Cross-network activity — for example, moving assets or messages between Ethereum and another chain — typically incurs fees on more than one network, which is why reductions in cross-network gas costs draw close attention from developers and users alike.

Rollups, the category of scaling system to which Rollup X belongs, execute transactions outside the Ethereum main chain and post data back to it, a design intended to lower costs while relying on the main network's security assumptions. A claimed 91% reduction in cross-network gas costs, if sustained outside the demo environment, would represent a substantial decrease in the fees associated with such operations.

Background: the Builders and the Venue

Gnosis is one of the longest-established companies in the Ethereum ecosystem, known for Gnosis Chain and for the Safe smart-account wallet, originally launched as Gnosis Safe. ZisK, Rollup X's co-builder, is known in the ecosystem for its zero-knowledge proving technology — a mechanism generally used to prove that computations performed off-chain were executed correctly, the kind of tooling rollup designs draw on so a main chain can verify work without re-executing it. The Ethereum Economic Zone (EEZ) initiative, under which the testnet was developed, takes its name from its focus on extending Ethereum's economic layer across connected networks.

Devcon is the Ethereum Foundation's flagship conference, gathering developers, researchers, and community members from across the ecosystem. Its staging in Mumbai served as the setting for Rollup X's first public demonstrations.

Source and Attribution

This report was first published by COINOTAG on November 7, 2026: https://en.coinotag.com/gnosis-eez-demo-cuts-ethereum-gas-91