Uniswap Partners with Across for Seamless Cross-Chain Swaps

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The decentralized exchange giant Uniswap has taken a major leap toward frictionless multi-chain trading by integrating Across Protocol, marking a pivotal advancement in cross-chain interoperability. Announced yesterday, this collaboration introduces permissionless, in-app cross-chain swaps directly within the Uniswap interface—eliminating the need for users to manually bridge assets across networks before trading.

As the Ethereum ecosystem continues to expand with a surge of Layer 2 (L2) rollups like Arbitrum, Optimism, Base, and zkSync, users have faced growing complexity in accessing liquidity spread across chains. Previously, executing a simple trade on a different L2 required multiple steps: withdrawing funds, bridging via a third-party protocol, waiting for confirmations, and finally placing the trade. This fragmented process not only increased time and gas costs but also created a poor user experience—especially for non-technical participants.

Now, thanks to the integration of Across’s intent-based bridging infrastructure, Uniswap users can seamlessly bridge and swap assets across nine EVM-compatible chains—all within a single interface.

How the Uniswap x Across Integration Works

The new functionality leverages intent-centric design, where users express their desired outcome (e.g., “swap USDC on Arbitrum to DAI on Base”) without needing to manage intermediate steps. Across’s protocol then handles the execution using relayers (or solvers) that monitor user intents and fulfill them efficiently across chains.

According to Across’s official blog, their system is engineered to process 99% of L2-to-L2 transfers under $10,000 in just 3 seconds. This speed is achieved through an innovative combination of bonded relayers and optimistic verification mechanisms derived from UMA’s optimistic oracle technology—also developed by Risk Labs, Across’s parent team.

👉 Discover how fast cross-chain swaps can be with next-gen DeFi tools.

This near-instant bridging capability addresses one of the most persistent pain points in multi-chain DeFi: latency. By embedding this directly into Uniswap, one of the most widely used DEXs in the world, the partnership significantly lowers the barrier to entry for everyday traders.

Supported Chains and Tokens

At launch, the integration supports nine EVM chains:

World Chain, Uniswap’s newly launched L2 built on the OP Stack and part of Optimism’s Superchain initiative, is notably included—highlighting the strategic alignment between Uniswap’s ecosystem expansion and broader interoperability goals.

Initially supported tokens include major stablecoins (such as USDC and DAI), wrapped Bitcoin (WBTC), and native chain assets like ETH on Ethereum, OP on Optimism, or ARB on Arbitrum. The focus on stable assets ensures predictable pricing during cross-chain execution while minimizing slippage risks.

Introducing ERC-7683: A New Standard for Cross-Chain Intent

A cornerstone of this collaboration is the co-development of ERC-7683, a new token standard designed specifically for cross-chain intent messaging. Unlike traditional token standards that focus on transfer mechanics within a single chain, ERC-7683 enables structured communication of user intent between chains—such as “transfer X amount of token A from chain B to chain C for eventual swap into token D.”

Nicholas Pai, CTO of Across, explained in a post on Ethereum Magicians that ERC-7683 aims to "shrink the scope of the problem" so decentralized exchanges and bridges can adopt it immediately while remaining compatible with existing cross-chain messaging frameworks like CCTP or LayerZero.

This modular approach allows for greater composability, meaning future protocols can build on top of ERC-7683 without reinventing the wheel. For Uniswap’s upcoming Unichain—its own L2 network—the standard will play a crucial role in enabling swaps with chains outside Optimism’s Superchain ecosystem.

Why This Matters for DeFi's Future

The Uniswap-Across partnership isn’t just about convenience—it’s a foundational step toward a truly unified DeFi experience. As blockchain fragmentation increases, the ability to move value and execute trades across chains without friction becomes essential.

With over **$12.7 billion in cumulative volume** bridged through Across since inception—and daily volumes consistently between $20M and $40M—the protocol has proven its reliability and scalability. Its integration into Uniswap amplifies its reach, potentially accelerating adoption across millions of active DeFi users.

Moreover, this move aligns with broader industry trends emphasizing user-centric design, interoperability, and reduced operational overhead in decentralized applications.

👉 See how leading platforms are redefining cross-chain efficiency today.

Frequently Asked Questions (FAQ)

Q: What are cross-chain swaps?

A: Cross-chain swaps allow users to exchange tokens on one blockchain for tokens on another blockchain without needing to use centralized exchanges or manually bridge assets first. The entire process happens in a single transaction flow.

Q: Do I need to trust Across or Uniswap with my funds?

A: No. Both protocols operate non-custodially. Your assets are never held by either platform. Instead, bonded relayers facilitate transfers using cryptographic guarantees and economic incentives to ensure honest behavior.

Q: Are there additional fees when using Across on Uniswap?

A: Yes, but they’re integrated transparently. You’ll see a total cost breakdown before confirming your swap, which includes gas, bridge fees, and slippage protection. These fees compensate relayers for executing your cross-chain intent.

Q: Is ERC-7683 live now?

A: The standard has been proposed and is actively being implemented through the Uniswap-Across integration. While not yet formally adopted across all networks, its deployment marks the beginning of wider industry adoption.

Q: Can I use this feature on mobile?

A: Yes. The cross-chain swap functionality is available across Uniswap’s web and mobile apps, ensuring consistent access regardless of device.

Looking Ahead: Toward a Unified DeFi Landscape

This integration sets a precedent for how major DeFi protocols can collaborate to solve real user problems. Rather than competing for isolated liquidity pools, Uniswap and Across are building bridges—literally and figuratively—to connect ecosystems.

As more projects adopt intent-based architectures and standards like ERC-7683, we’re likely to see a shift from chain-hopping workflows to seamless, abstracted multi-chain experiences. In this future, users won’t need to know which chain they’re on—they’ll simply express what they want, and the underlying infrastructure will make it happen.

For developers, this opens up new possibilities for building composable applications that span multiple networks. For traders and investors, it means faster execution, better pricing, and less exposure to operational risk.

👉 Explore next-generation DeFi innovations shaping 2025’s crypto landscape.

Core Keywords

By combining powerful infrastructure with intuitive design, Uniswap and Across are paving the way for a more connected, efficient, and accessible decentralized finance ecosystem—one seamless swap at a time.