Across Protocol
Web3 / cross chain
Across Protocol is a cross-chain bridging solution built on an intent-based architecture where users sign orders expressing their intent to move tokens across different blockchain networks. Rather than locking tokens on the source chain and minting wrapped versions on the destination, Across uses a network of relayers who front liquidity to instantly complete user transfers on the destination chain. The protocol then settles these transfers asynchronously through a verification and insurance mechanism, with relayers earning fees for their service. This design dramatically improves user experience by enabling near-instant cross-chain transfers while maintaining security through economic incentives and cryptographic proofs. Example: A user on Ethereum wants to bridge 10 USDC to Arbitrum. They sign an intent order on Across, and a relayer immediately provides 10 USDC on Arbitrum, allowing the user to receive funds instantly. The relayer is then reimbursed from Ethereum through the protocol's settlement layer, earning a small fee for fronting the liquidity. Why it matters for cross-chain interoperability: Across demonstrates how intent-based design can solve the bridge trilemma of speed, cost, and security. It enables seamless multi-chain experiences without requiring users to wait for slow settlement or accept high bridge fees.
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