How to Read a Crypto Swap Quote (Gas, LP Fees, Slippage)
A swap quote can look like a CoinGecko ticker. You sign, then the wallet pays out less. The gap is usually not a hidden YiFi tax. It is network gas, an LP or exchange fee already inside the output, and slippage on an indicative route. Here is how to read a crypto swap quote field by field before you confirm: what you pay, what you keep, and when to stop.
Summary: Do not treat the mid-market ticker as the trade you will get. Read estimated output, split network gas from the LP or exchange fee, and treat minimum received as the floor. If a route is off-chain, read the KYC label as a hint only, then confirm destination asset, chain, and wallet and refresh before you sign.
YiFi is a non-custodial swap aggregator: you keep the keys, and YiFi does not hold your coins. The screen compares DEX pools (on-chain contracts), CEX desks (a company processing the trade), and private liquidity through Smart Routing, a ranker of paths. Homepage FAQ text says YiFi adds no extra platform fee on swaps. You still pay network gas plus exchange or LP fees. Swap Terms treat every quote as indicative.
Open only the official YiFi Swap screen. Skip random widgets. Set the pair, amount, and chains you will actually use. Walk the fields below in order. Do not sign until the wallet prompt matches.
How to separate the mid-market number from the aggregator’s route
A mid-market or ticker price is a public average. Use it as a sanity check, not as the fill. The number that matters is you receive / estimated output on the booked route. That path can hop a pool, a bridge, or an off-chain desk named on the homepage: LI.FI, Rango Exchange, 0x, Quickex, or ChangeNOW.
Price impact is how much your own size moves the pool. Slippage is how far below the estimate you still accept. 0x notes split quoted, executed, and adjusted price after gas. Do compare quotes on the same input by estimated output plus gas.
Workflow before you sign:
Official Swap UI → pair / amount / chains → estimated output vs mid-market → gas vs LP or exchange fee → minimum received + slippage → KYC label if off-chain → destination asset / chain / wallet → refresh if stale → sign
Do start with the route card, not a portfolio app. Don’t treat a stablecoin ticker as proof of the fill. If a hop is a name you cannot explain, stop and pick another path.
Check network gas vs exchange and LP fees before you sign
Gas is the network fee in the source chain’s native coin, such as ETH on Ethereum, paid to validators. Ethereum.org describes it as gas units times base fee plus priority fee. Their Uniswap-style example uses 184,523 gas units, a unit count, not a dollar price. A revert still burns gas.
An LP fee is the cut a liquidity pool takes for being your counterparty. Uniswap v3 typical tiers include 0.01%, 0.05%, 0.30%, and 1%. Those are pool fees, not a YiFi tariff. LI.FI docs split gasCosts (native token on top of the send amount) from feeCosts (often in the sending token). If a fee is marked included, do not add it again.
| Field | What it is | What to do |
|---|---|---|
| Mid-market / ticker | A public reference price | Do not treat it as execution |
| You pay / from | Asset, amount, source chain | Check wallet balance and network |
| You receive / estimated | Indicative output after the route | Compare routes on this number and on gas |
| Minimum received | Floor after slippage | If it is far below the estimate, do not sign |
| Network gas | Native token paid to validators | Keep native coin for a retry |
| LP / exchange / bridge fee | Usually already inside the output | Avoid double-counting when the UI says included |
| Route | DEX, CEX, or private hops | Stop if a hop is unclear |
| KYC label | Hint on an off-chain provider | Not a guarantee; pick another route if needed |
| Destination | Token, chain, receiving wallet | Same ticker on another chain is another asset |
Do this, not that: Check native gas plus a retry buffer before you approve. Don’t add an LP fee when the quote already subtracted it. Wallet teams can use the crypto swap API fee models guide.
Treat the quote as indicative when slippage, failed routes, or bridges appear
YiFi Swap Terms (updated 2026-07-17) say quotes, rates, route rankings, and KYC labels are informational. Outcome can differ after slippage, price moves, failed routes, network load, or bridge delays. An indicative quote is a snapshot, not a locked fill.
Read minimum received as the floor you still accept. LI.FI documents toAmount as the estimate and toAmountMin as the floor. Their default example is 0.5% per step. A swap-plus-bridge-plus-swap path can stack that idea to about 1.5% in that documentation. If the floor looks ugly, cut size, refresh, or change route first.
Do make sure the wallet’s minimum matches the quote screen. Don’t raise slippage “so it goes through” as the first move. After a cross-chain hop, a bridge delay often explains a late credit. Check the explorer against minimum received, not the ticker.
Read the KYC label on off-chain providers before choosing a route
A KYC label is a small interface tag. It hints at whether that provider may ask for identity checks. Swap Terms call it informational. It can be wrong or stale. The provider’s own rules win. YiFi does not run KYC on Swap users. An off-chain desk may still request documents, delay, reject, freeze, or reverse a transfer.
Do open the Swap Terms if a label is unclear, then pick another route or a DEX-only filter. Don’t read a “no KYC” chip as a forever pass, and don’t assume YiFi collected your passport. Restricted regions sit in the Terms and AML policy. This guide does not list countries.
Confirming destination asset, chain, and wallet before you sign
Same ticker, different chain, different asset. USDT on Ethereum is not USDT on another network. Confirm the token, the chain, and the receiving wallet carefully.
ERC-20 approval is a separate transaction with its own gas. Check the spender and the allowance before that first prompt. You can still need a little destination native token after arrival to move funds onward.
Do refresh if the quote sits too long, gas jumped, or the route flipped. Don’t sign a stale payload. Sign only when source-chain native gas covers this attempt plus a retry, and the wallet fields match the screen.
Fix common quote mistakes before the next swap
Use this checklist on the next trade. If any line fails, do not sign.
- Open the official YiFi Swap UI and set the pair, amount, and chains you will actually execute.
- Read you receive / estimated output on the aggregator route. Ignore the mid-market ticker as execution.
- Split the cost: network gas in the native coin versus the exchange or LP fee already inside the output.
- Read minimum received as the slippage floor. If it sits far below the estimate, cut size or change route.
- If the route is off-chain or CEX, read the KYC label as an interface hint, not a forever promise.
- Confirm destination ticker, chain, and receiving wallet. The same ticker on another chain is another asset.
- If the quote looks stale, refresh it. Check any ERC-20 approval as its own gas-paying transaction.
- Sign only when native gas covers the source chain plus a retry, and wallet fields match the quote.
- After execution, check the explorer: status, actual output versus minimum received, and whether only gas burned on revert.
Avoid signing because the headline rate “looks fair.” Avoid raising slippage before you refresh or shrink the size. Avoid mixing approval gas into the swap quote as one fee. If the quote still looks right, go back to YiFi Swap, refresh once, and sign only that new payload.
Frequently asked questions
Does YiFi add a platform fee on swaps?
YiFi’s homepage FAQ says it charges no additional platform fee on swaps. You still pay network gas and exchange or LP fees. Swap Terms say any fee YiFi itself charges is shown before you confirm, and that structure can change.
Why did execution differ from the quote?
The quote is indicative. Slippage, a failed hop, network load, or a bridge delay can change the fill. Check minimum received, then the explorer for actual output.
What does a KYC label on a swap provider mean?
It is an informational hint about that provider’s identity checks. It may be stale. YiFi does not perform KYC on Swap users, but an off-chain desk may still ask, delay, or freeze. Open that provider’s terms or pick another route.
Is gas refunded if the swap reverts?
Usually no. Validators already processed the failed transaction. Keep extra native coin for a retry.
Should I raise slippage so the swap goes through?
Not as the first move. Refresh the quote, reduce size, or change the route. Raising slippage only widens how bad a fill you will still accept. Use it last, and only if you accept the new minimum.
Do I need gas on the destination chain?
Bridge or relayer cost is often priced into the route. After arrival you may still need the destination’s native token to move funds. Check that balance before you need to leave the wallet.
How do I compare two quotes fairly?
Lock the same input amount and destination. Compare you-receive plus native gas plus minimum received. Ignore the prettier mid-market rate. The better sticker can be the worse fill after gas.