Set a Minimum Output for Destination Swaps

A destination swap price floor sets the least amount of the target token a cross-chain route may deliver before execution must fail or take another defined path. It turns a quoted output into a limit: if destination-chain trading cannot meet it, the swap should not quietly settle for less.

How does a destination swap price floor work?

The route estimates how much of the destination token a swap will produce, then applies a slippage allowance to calculate its minimum output. That floor is the amount the user accepts, not a promise that the route will execute or that the quote will remain available.

A cross-chain route can include a source-chain swap, a bridge transfer and a destination-chain swap, each with different execution conditions. A floor for the final token gives the user a single outcome to assess; a discussion of ParaSwap’s cross-chain swaps during source-chain congestion covers how delays can complicate that route.

What should the floor include?

Check whether the displayed minimum refers to the final destination token after all route fees and swaps. Some quotes show intermediate amounts or treat bridge costs separately, so the number to compare is what should arrive in the wallet, in the correct token and on the correct chain.

• Estimated destination output and the minimum accepted output.
• Swap fees, bridge fees and any destination execution cost.
• Quote expiry and whether the destination leg can be re-priced.
• What happens if the floor cannot be met: failure, refund or a separate recovery process.

These details vary by route. A displayed floor protects only the execution step that enforces it; it does not by itself guarantee a refund, cover network fees or prevent a transfer from being delayed.

How should users choose a price floor?

Start with the minimum amount of the destination asset that makes the trade worthwhile, then compare that amount with the route’s quoted floor. A tighter floor rejects more price movement but can make execution fail; a looser floor gives the route more room to complete while accepting a worse outcome.

Do not widen the limit just to push through a stale quote. Refresh it and compare the new estimated output, final minimum and total fees. If the route cannot meet the amount you need, wait or change the trade size; the next step is to re-quote or let the route’s stated failure process run.