1inch Integrates Unichain: Boosting DeFi Efficiency with OP Stack Layer-2

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By Maxwell Reed

1inch, a prominent decentralized finance (DeFi) aggregator, has announced its integration with Unichain, an innovative Layer-2 solution built on the OP Stack. This strategic development is designed to significantly enhance token swap efficiency, reduce transaction costs, and bolster security protocols across the rapidly evolving cross-chain DeFi ecosystem.

Launched in February 2025, Unichain operates as an OP Stack-based Layer-2 network, engineered to facilitate faster, more cost-effective, and Ethereum-compatible transactions. Its integration empowers 1inch users with optimized token swap routing within Unichain and across other Ethereum Virtual Machine (EVM) networks, leveraging Unichain’s impressive growth and substantial liquidity. By mid-June 2025, Unichain’s Total Value Locked (TVL) had surged to $832 million, as reported by DeFiLlama. This growth is further underscored by its substantial stablecoin adoption, with a cumulative market capitalization reaching $344.2 million by June 2025; remarkably, over 51% of these stablecoins were directly issued on Unichain. This robust adoption highlights strong market confidence in the network’s capabilities. According to Sergey Kunz, co-founder of 1inch, this integration aligns seamlessly with “our concept of a fully integrated, cross-chain DeFi infrastructure,” citing “instant swaps, native MEV protection, and deep liquidity” as crucial elements for expanding cross-chain trading boundaries and ensuring users receive optimal execution.

The integration also introduces several advanced technical features. Transactions on Unichain benefit from sub-200-millisecond block times, capitalizing on the inherent efficiency of the OP Stack. A key security enhancement is the implementation of dual protection against Maximal Extractable Value (MEV) bots, combining 1inch’s proprietary Fusion solution with Unichain’s block formation, which utilizes Trusted Execution Environments (TEE). Comprehensive support for Unichain is now available across the 1inch dApp, 1inch Wallet, and the project’s API, including the real-time display of Uniswap balances within the 1inch Portfolio.

Developer & Protocol Support

Beyond the immediate benefits for end-users, the integration extends to the 1inch Developer Portal, offering API access to Unichain. This enables developers to leverage advanced functionalities such as Fusion, Fusion+, and the order book within their applications. Key protocols now supported within the Unichain ecosystem include WETH, Uniswap V2, Uniswap V3, and Uniswap V4. This strategic move further solidifies 1inch’s standing as a leading aggregator, effectively bridging diverse DeFi ecosystems and providing extensive trading solutions across its more than 12 supported networks.

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