FAQ

It’s best described as a protocol. The web app is one interface to interact with smart contracts. You sign transactions with your wallet.

Common causes: not enough gas, slippage too low, missing approval, wrong network, or a problematic token (tax/restrictions).

It’s underperformance vs holding when prices diverge. Fees may offset it, but not always.

It’s a supported way to embed the official UI, but safety still depends on domain trust and user behavior. Never share seed phrases.

No. You can swap tokens without UNI. UNI is a governance token; you may need the network’s native token for gas fees.

No. UNI is a governance token. For swaps you usually only need the network’s native token to pay gas, plus the tokens you want to trade.

It’s the lowest output you’re willing to accept after slippage. If the market moves too far, the transaction reverts instead of giving you a worse price.

Different pairs have different volatility. Higher volatility pairs often use higher fee tiers to compensate liquidity providers, while stable pairs can work with lower fees.

Yes. If the transaction executes and then reverts, you still pay gas. The swap itself doesn’t happen, but network fees are consumed.

Approvals allow a contract to move your ERC‑20 tokens. The first time you swap a token, you often need to approve it. Prefer smaller approval limits when possible.

The iframe loads the official Uniswap interface, but safety still depends on you: verify token addresses, check the network, and never sign transactions you don’t understand.