A cross-chain bridge quote estimates what you will receive, what you will pay, and how long a token transfer may take on a route between networks. The key condition is that the quote must match the exact token, amount, destination chain, and recipient you intend to use.
- Compare the destination amount after fees, not a headline fee by itself.
- Check which token arrives and whether the estimate includes a destination-chain swap.
- Treat quoted time as an estimate: route design and network conditions affect completion.
What should you compare in each quote?
- Match the transfer details. Enter the same source chain, destination chain, token, amount, and recipient for every route. A token with the same ticker can have a different contract address on another network, so check the destination asset’s identity before comparing amounts. Super Bridge transfers let you compare eligible native and third-party routes in one place, which can save you from checking providers one by one.
- Compare the amount you will receive. Record the quoted destination amount and any minimum amount, often shown as “minimum received” or “to amount min.” The LI.FI API specification separates estimated output from minimum output and lists route fees, illustrating why the largest displayed figure alone may not be the amount you can rely on.
- Add up the costs and steps. Check source-chain gas, bridge or relayer fees, any swap fee, and destination-chain gas if the route requires a separate transaction. Also note approvals: an ERC-20 transfer may require a wallet signature to approve token spending before the bridge transaction. Ethereum.org’s bridge guidance identifies gas and route-dependent fees as parts of transfer cost.
How do you choose between routes?
- Choose by usable output, timing, and route design. For example, say you want to move 1 ETH from Optimism to Base. Route A quotes 0.995 ETH in five minutes; Route B quotes 0.998 ETH in 20 minutes. If you need funds quickly, the extra 0.003 ETH may not be worth waiting for; if timing is flexible, compare the full fees and route details before deciding. These figures are illustrative, and estimates can change with liquidity and network conditions.
I would select the route that delivers the token I need at an acceptable net amount and time, then review its provider and transaction details before signing. A route aggregator such as Super Bridge can surface different paths, but the route still determines how the transfer is carried out; a native bridge and a third-party liquidity route can differ in trust assumptions and withdrawal process. Recheck the quote if the amount or network conditions change.
What else should you know before sending?
Is the lowest fee always the best route?
No. A low stated fee can come with a lower destination amount, a slower estimate, or an extra swap or claim step. Compare what reaches your wallet after all quoted charges, then weigh the time and route design. For a small transfer, a separate destination transaction can matter more than a small difference in the bridge fee.
Why does the received amount change after I request a quote?
Quotes depend on current liquidity, gas costs, and market conditions. A route may also involve a token swap, where price movement and available liquidity affect output. Treat the estimate as a snapshot: refresh it shortly before signing, and make sure the wallet transaction still matches the amount and destination you reviewed.
Does a faster route use the same bridge mechanism?
Not necessarily. A route that uses destination-side liquidity can pay out before the source-chain transfer has fully settled, while a native bridge may wait for its own verification or finality process. Faster delivery can therefore involve different providers and trust assumptions. Check the route details and its stated completion process rather than inferring the mechanism from speed alone.
What should I check in my wallet before confirming?
Confirm the source network, token contract, amount, recipient, and any approval or swap shown in the transaction. Check that the wallet’s gas estimate is affordable and that the destination address is correct. If the final wallet transaction differs materially from the quote, pause and request a fresh quote before signing.
Choose by the amount you can use, the time you can accept, and the route you understand—not by one fee number.
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