What a swap costs on Ethereum
Gas is paid in ETH and is genuinely volatile — single-digit gwei on a quiet Sunday, many times that during a mint or a liquidation cascade. The fee you are quoted is an estimate of a moving target, and a transaction submitted too cheaply can sit pending for a long time.
Every swap has three separate recipients and FBT Swap is only one of them. Network gas is paid in ETH and goes to the chain itself. The pool fee sits inside the price you are quoted and goes to liquidity providers. The platform fee is 0.70% of the input. None of the three is taken out of another, and none of them changes after you sign.
Getting assets onto Ethereum
Ethereum is the hub every rollup on this list bridges back to, so assets usually arrive by withdrawing from a layer 2 or from an exchange. Withdrawals from a rollup to Ethereum carry a challenge delay on optimistic chains, which is a feature of the security model and not a malfunction.
Before moving a large amount, send a small test transfer and confirm it arrived on etherscan.io. FBT Swap is non-custodial and cannot reverse, freeze or compensate a transfer sent on the wrong network — it never holds the funds, so there is nothing for it to return.
What to check before you sign
Old token approvals accumulate here more than anywhere else, because this is where people have been transacting longest. An unlimited approval granted to a contract in 2021 is still live today unless it was revoked, and it is still exactly as dangerous.
Check three things every time: the network name your wallet is showing and chain ID 1, the contract address of the token you are receiving, and the size of the approval you are granting. An unlimited approval stays live until you revoke it — it is a separate signature from the swap and deserves separate attention.
What this page does not promise
The rate you see is the best route among the venues queried at that moment, which is not the same as the best price available anywhere. Routing through an aggregator reduces exposure to sandwich attacks but does not make a public transaction immune to them, and FBT Swap does not forecast prices or recommend trades.
FBT Swap cannot audit token contracts you import yourself, cannot restore a lost recovery phrase and cannot reverse a confirmed transaction. The only official domain is fbtswap.ir and the only contact address is fbtswap@gmail.com; we never contact users first.