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title Let users take an action in your app and pay with assets on another supported chain. Relay combines bridging and the destination call into one flow, so users don’t need to bridge separately before checking out or interacting with a contract. Gas requirement — With standard EOA wallets, the user needs native gas on the origin chain to broadcast the deposit. Solvers pay destination-chain gas, with costs included in the quote. For users without native gas, see Gasless Swaps or Smart Accounts.

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How it Works

Your application includes destination calldata in its quote request. The user executes the returned deposit steps, and a solver uses its own capital to execute the destination call. The platform tracks completion; Relay Protocol describes the separate settlement flow for orders that use its Depository contracts. Learn how to integrate cross-chain call execution with our Call Execution Integration Guide.