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Documentation Index

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toAmount is the estimated post-swap amount. toAmountMin is the minimum amount based on your slippage setting.A lower toAmount can result from price impact or market fluctuations.To filter out routes with high price impact, use the maxPriceImpact parameter.
  • Slippage: Difference between toAmount and toAmountMin
  • Price impact: Difference between the original quote and toAmount
Our default slippage, when no slippage is set, is 0.5% per step (0.005 on the API). Slippage is expressed as a decimal from 0 to 1, where 1 = 100%.For example, a route that includes swap + bridge + swap can result in 1.5% total slippage in that sense, but there are some exceptions:
  • Some exchanges, such as those on Solana, may suggest their own slippage if none is set.
  • Some bridges, such as cBridge for small amounts, may enforce their own slippage to help ensure successful transaction execution. In those cases, we pass on that slippage.
The API accepts manually set slippage of up to 1 or 100%, expressed as a decimal.We recommend not tracking the slippage set by the user directly, but instead tracking the toAmountMin from our quotes. This is the value we promise the user after slippage. If they receive less than this amount, something is likely off. We also track this on our side so we can investigate transactions that users report.
No. Increasing slippage tolerance does not prevent rate changes. It only widens the acceptable range before failing the transaction.
Use 0.5%. Slippage is typically minimal unless the trade size is very small or very large.
It depends on the token, chain, and amount. There is no universal value.To reduce failures:
  • Execute the quote immediately
  • For Solana same-chain swaps, omit the slippage parameter to let LI.FI auto-calculate
LI.FI calculates price impact using the difference in USD value between input and output tokens.Price impact filtering does not apply to trades under $10.
  • Execute the quote immediately
  • Refresh the quote if delayed
  • Increase the allowed slippage in your API request
Yes. A minimum received amount is enforced when the user signs; execution must deliver at least that minimum or it reverts. Slippage exists because prices/liquidity move between quote and execution. Auto slippage picks a suitable buffer by asset liquidity (lower for stablecoins, higher for long-tail assets), and LI.FI commonly defaults to ~0.5% with the minimum slightly below the estimate to absorb normal movement.