Slippage & Price Impact¶
Prices move between the moment you get a quote and the moment your sweep executes. Slippage settings define how much movement you accept; price impact measures how much your own trade moves the market. DustSweep protects you on both, per token.
Slippage¶
What it is. The difference between the quoted output and the actual output at execution time.
Your setting. Default tolerance is 0.5%, adjustable up to a maximum of 30%. For typical dust sweeps the default is right for almost everyone.
How DustSweep enforces it — two layers:
- Per token: every token's swap instruction carries its own minimum output (
quote × (1 − tolerance)). A swap that cannot meet its floor fails — and on the current contract, a failed swap is simply skipped and refunded, never executed at a bad price. - Whole sweep: the contract additionally enforces an overall minimum at settlement as a backstop.
So the worst case for any single token is: it does not get swapped and comes back to you. It is never sold below its floor.
Price impact¶
What it is. How much your own trade moves the pool's price — significant mainly for tokens with thin liquidity.
DustSweep's guard: if any route's price impact exceeds 5%, the app stops and asks you to explicitly confirm before sweeping.
When you see this warning, consider:
- Sweeping a smaller amount of that token.
- Removing that token from the selection.
- Accepting the impact knowingly — for true dust, a few percent on a $1 balance may be fine.
Choosing a slippage setting¶
| Setting | Effect |
|---|---|
| Lower (e.g. 0.1–0.5%) | Tighter price protection; more tokens may be skipped (and refunded) in fast markets. |
| Higher (e.g. 1–3%) | More tokens succeed first try; each accepts a slightly worse worst-case price. |
User Safety Note Never set high slippage to "force" an illiquid token through. A high tolerance is exactly what sandwich bots exploit — you are signing permission to receive that much less. If a token only swaps at 10%+ slippage, the honest answer is that its market is too thin; let DustSweep skip and refund it.
FAQ¶
Does higher slippage mean I always get less? No — slippage is a worst-case floor, not the expected outcome. You receive whatever the market gives at execution, floored by your setting.
A token was skipped for slippage. Did I lose anything? No. Its full amount was refunded to your wallet in the same transaction. You can retry with a fresh quote.
Is the protocol fee related to slippage? No. The 2% fee applies to the realized output; slippage settings only set the minimum acceptable output. See Fees.