We're excited to announce that Across will support bridging on day one of Unichain’s public mainnet —Unichain is a revolutionary new Layer 2 that brings DeFi optimization and unprecedented performance to the Ethereum ecosystem.
Key Takeaways
Across launches as a day one crosschain transfer solution for Unichain, enabling fast and secure transfers between Unichain and the rest of the Ethereum ecosystem.
Building on our collaboration with Uniswap Labs on ERC-7683, this integration strengthens the shared vision for crosschain interoperability.
Users benefit from Across's battle-tested infrastructure combined with Unichain's fast 1-second block times, with 250ms sub-blocks coming soon.
What is Unichain?
Unichain is a next-generation Layer 2 blockchain platform built for DeFi optimization. Built with insights from developing one of the most successful protocols in DeFi, Unichain delivers exceptional performance for all types of applications:
Ultra-fast block times: 1 second blocks at launch, with 250 millisecond effective block times coming soon
95% lower costs compared to Ethereum mainnet
Enhanced decentralization through the Unichain Validator Network, coming soon
Commitment to support native interoperability when it goes live later this year, with support for ERC-7683 and crosschain transactions in Uniswap Labs products
First L2 to be a stage 1 rollup at launch
While optimized for DeFi operations, Unichain welcomes builders of all kinds—from DAOs to NFTs, SocialFi and beyond.
Powering Crosschain Innovation
Our integration with Unichain builds on our existing collaboration with Uniswap Labs. As co-authors of the ERC-7683 standard, we share a vision for seamless crosschain interoperability where users don’t need to know which chains they’re transacting on. Across is proud to be the bridging solution on the Uniswap web app and wallet, enabling secure, fast transfers across nine chains.
Native Interoperability will provide a robust foundation for protocol-level communication through multi-chain fault proofs when it goes live later this year. However, true crosschain interoperability requires more than just basic communication—it needs intelligent routing and execution. This is where an Intents-based architecture comes into play.
Combining Native Interop with an Intents-based system (as articulated in ERC-7683), unleashes a breakthrough in crosschain interop. Native Interop will dramatically improve the economics, latency, and security of Intents-based systems by enabling new, faster settlement pathways. This synergy will directly reduce filler operational costs, which will translate to lower expenses for end users and developers.
The combination of Across' Intents-based architecture and Unichain's optimized infrastructure delivers:
Lightning-fast transfers with 2-second fills
Optimal capital efficiency through a decentralized filler network
Seamless liquidity movement across the ecosystem
Enhanced security through canonical asset transfers
Seamless integration with OP's Superchain Native Interop
Technical Integration Details
At launch, users can bridge the following assets between Unichain and almost 20 supported EVM chains:
ETH
USDC
Coming soon:
DAI
USDT
Building an Open, Interoperable Future
This collaboration represents more than just another chain supported—it's a step toward a more connected and efficient blockchain ecosystem. Together with Unichain, we're working to create an environment where:
Applications of all types can seamlessly operate across chains
Users enjoy fast, cheap, and secure crosschain transactions
Developers can build without worrying about chain boundaries
Liquidity flows efficiently throughout the crypto market
Innovation in DeFi benefits the entire web3 ecosystem
The future of web3 is multichain, and Across is proud to help power this future with Unichain.
Ready to be among the first to experience the next generation of crosschain technology?
Start bridging to Unichain here.