11,000 ETH sold by 1inch as they test their new protocol upgrade called Fusion

1inch carried out a large on‑chain sale of ether as part of testing and validating new functionality in its Fusion upgrade, using its own treasury funds to simulate real trading flows and stress‑test the protocol’s transaction mechanics. The move highlights how major DeFi teams increasingly use production-scale transactions to validate complex routing, settlement, and MEV‑mitigation logic in upgraded swap engines before broader rollout. Fusion is 1inch’s overhauled swap engine that replaces parts of its previous limit-order and aggregation stack and routes trades through off‑chain "resolvers" (professional market makers) that compete to fill user orders and pay gas on their behalf. It enables users to swap without holding native gas tokens, adds MEV protection, and is designed to improve execution quality and reliability. Testing an 11,000 ETH transaction path through Fusion provides a high‑value, realistic scenario to evaluate how the upgraded contracts handle settlement, resolver behavior, and gas sponsorship under live mainnet conditions. This type of internal, treasury‑funded test is particularly important in light of prior security learnings around older Fusion implementations and resolver integrations, which 1inch has addressed in newer versions. For market participants, the test signals that 1inch is actively hardening and iterating its core routing infrastructure at scale, which could affect how large swaps are executed across DEXs and aggregators. It also underscores broader DeFi trends: the growing role of solver/resolver networks, gas‑sponsored transactions, and sophisticated anti‑MEV techniques at the protocol level, as well as the need for careful security review when migrating to new settlement logic.

✨ AI-generated background, compiled from web sources — not editorial content.

More coverage

• Vulnerability in obsolete 1inch contract affecting resolver contracts (1inch.com)
• What is 1inch Fusion, and how does it work? (help.1inch.com)
• 1inch Fusion+ Full Sequence - CoinsBench (coinsbench.com)
• 1inch/fusion-protocol - GitHub (github.com)
• 1inch Limit Order Protocol, Fusion & Fusion+ - MixBytes (mixbytes.io)

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