Across
Across is an interoperability protocol powered by intents, enabling fast, low-cost, and secure crosschain token bridging and swaps.
Overview
Across is a crosschain interoperability protocol designed to simplify and optimize token bridging and crosschain swaps. It introduces a novel approach called "intents," which are user-centric crosschain limit orders combined with executable actions. This abstraction allows developers to embed standard orders in their applications, enabling seamless crosschain experiences without managing complex execution paths. Across focuses on delivering the fastest and lowest-cost bridging solution with strong security guarantees, making it suitable for developers building multichain decentralized applications (dapps) and DeFi platforms.
The protocol operates through a modular three-layer system: a request-for-quote mechanism, a competitive relayer network, and a settlement layer that escrows user funds, verifies transactions, and repays relayers. This design fosters competition among relayers to find optimal execution paths, reducing costs and latency for end users. Across supports a broad and growing list of blockchains, allowing developers to integrate crosschain value transfers and swaps via simple REST APIs or smart contract calls. The Swap API enables 1-click crosschain swaps, abstracting complexity and enabling instant token bridging and swapping in a single transaction.
What sets Across apart is its intent-based architecture, which replaces traditional explicit execution steps with outcome-driven orders. This approach reduces developer overhead and enhances user experience by allowing relayers to compete for the best execution. Across is production-ready and has processed over $22 billion in transactions with more than 15 million fills, maintaining average fill times under one minute and bridging costs below $1 per ETH. Developers can quickly onboard assets into their apps, embed crosschain staking or minting actions, and run their own relayers to participate in the network. Comprehensive documentation, active community support via Discord, and audited contracts facilitate smooth integration and ongoing development.
The Problem
Crosschain interoperability often involves complex, costly, and slow bridging solutions that require developers to manage explicit execution steps and trust assumptions. Users face high fees and latency when transferring assets across blockchains, limiting seamless multichain experiences.
The Solution
Key Features
Fast and Low-Cost Bridging
Processes transactions with average fill times under one minute and fees below $1 per ETH bridged.
Swap API for 1-Click Crosschain Swaps
Enables developers to initiate token bridging and swapping in a single composable contract call.
Extensive Chain Support
Supports a growing list of mainnet and testnet blockchains for broad interoperability.
Key Strengths
How Developers Use Across
Integrating Crosschain Token Swaps in DeFi Apps
DeFi developers use Across's Swap API to enable users to bridge and swap tokens across chains instantly within their applications.
Building Multichain NFT Marketplaces
NFT platform developers embed crosschain intents to allow seamless asset transfers and minting across multiple blockchains.
Running a Relayer to Earn Rewards
Infrastructure developers operate relayers in the Across network to compete for transaction fills and earn up to 100% APY.
Works Well WithLiskLineaEthereumBlast
Arbitrum One
Base
Mode
Optimism
Redstone Mainnet
Scroll
Zora
zkSync Era
Solana
BNB Smart Chain
World Chain
Unichain
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Pricing
Standard | |
|---|---|
| Price (Monthly) | Free |
| Price (Annual) | Free |
| Messaging | N/A |
| Support | Community support via Discord and GitHub |
| Analytics |
Resources
Across provides extensive developer resources including detailed documentation, API references, integration guides, and community support channels to facilitate rapid onboarding and troubleshooting.