What a swap costs on Optimism
Gas is paid in ETH, usually well under a cent. As with every rollup here, the bulk of what you pay is the cost of publishing your transaction data to Ethereum rather than the cost of executing it.
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 Optimism
The canonical bridge from Ethereum is fast inbound and subject to the standard seven-day challenge period outbound. Most exchanges support direct Optimism withdrawals, which is simpler for a first deposit.
Before moving a large amount, send a small test transfer and confirm it arrived on optimistic.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
Optimism and Base share an architecture but are separate chains with separate balances. Tokens sent to an Optimism address expecting Base will not appear on Base, and the matching addresses across both chains make that mistake unusually easy to talk yourself into.
Check three things every time: the network name your wallet is showing and chain ID 10, 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.