Fees
DustSweep charges a single protocol fee of 2%, taken from the swap output — plus normal Base network gas. There are no deposit fees, no subscription, and no fee on failed or refunded tokens.The protocol fee
How it works on-chain: after all swaps complete, the contract measures the total output it actually received, takes
output × fee, sends that to the fee collector, and transfers the remainder to you — all in the same transaction. The fee is visible in the quote before you approve anything.
The fee is part of what you sign
On the signature-based flow (Sign & Sweep), the exact fee percentage is embedded in the message you sign. If the fee were changed after you signed, your signature would become invalid and the transaction would fail — the fee you see is cryptographically the fee you pay.Gas
Gas is paid to the Base network, not to DustSweep. Sweeps are heavily batched, so even a 30-token sweep typically costs only a few cents on Base. The quote panel shows an estimate. Some smart wallets (e.g. Coinbase Smart Wallet) may have gas sponsored via a paymaster when available — in that case you may see no gas charge at all. Availability depends on configuration.Example
Sweeping dust worth ~$20 into USDC:User Safety Note The quote always shows the fee before you confirm. If any interface claiming to be DustSweep shows a fee above 3%, it is not the real contract — the cap is enforced on-chain.