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Across Prime - Paradigm

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Solving interoperability for Ethereum and other blockchains requires “fast” bridging—bridges that can move assets and actions between chains at faster-than-finality speeds. Intent-based bridge designs, like what Across protocol offers today, are the leading design to solve this problem. Fast bridges depend on third party relayers (aka solvers) to fill a user’s “intent” on a destination chain in exchange for a payment on the origin chain. Most such bridges—like Across—use an “escrowed” model where payment is escrowed until the intent is verified as “filled”. This escrowed design introduces capital costs as relayers must wait before being repaid; relayers effectively act as short-term lenders to fill user intents. Across Prime introduces a “bonded” model where the relayer puts down a collateralized bond to secure a particular path from an origin chain to a destination chain. This allows the user to send money directly to the relayer on the origin chain. The bonded model is significantly

Across Prime - Paradigm Research Across Prime 05.06.2025 | Hart Lambur Matt Rice Dan Robinson Outline 1. Introduction 2. Mechanism 1. Trusted 2. Escrowed 3. Bonded 3. Protocol 4. Extensions 1. Arbitrary Bond Collateral 2. Multiple Destinations 5. Discussion 1. Gas Efficiency 2. ERC-7683 Compatibility 3. Mint-and-Burn Bridge Compatibility 6. Prior work 1. Across 2. Orbiter Protocol 3. UniswapX (Crosschain) 4. Relay Protocol 7. Further Work Introduction This paper introduces Across Prime, a design for a capital efficient trustless fast bridge. Solving interoperability for Ethereum and other bloc

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