Why a bridge quote can differ from the amount delivered

A token bridge quote estimates how much of an asset should reach the destination chain; the delivered amount is what the recipient wallet actually receives. The difference starts with what each figure measures: the source amount is the input, while the quoted output is an estimate after the route’s costs and any token swap.

What does a bridge quote include?

A quote is a snapshot of a proposed route, including the source and destination tokens, available liquidity and applicable fees. Some costs, such as source-chain gas, are paid separately from the amount being bridged; others may be reflected in the quoted output. Check the fee breakdown instead of assuming every cost comes out of the token amount.

For the route mechanics behind a bungee bridge, see the fuller explanation of how a transfer moves from approval to destination. The key comparison here is between the source input and the estimated destination output, not two versions of the same figure.

• Source amount: the tokens submitted on the origin chain.
• Quoted output: the estimated destination tokens after route costs and any conversion.
• Minimum received: a lower bound the route may enforce when the interface provides one.
• Delivered amount: the tokens credited to the recipient address when the transfer completes.

Why can the delivered amount change?

The quote can become stale while a transaction waits to execute. A swap along the route may get a different price as liquidity changes, and the route may charge fees in a different token from the one being transferred. Network gas can also change, though it may be billed separately rather than deducted from the delivered tokens.

Some routes set a minimum output: if execution would fall below that limit, the swap can fail instead of delivering less. That protection does not make every quote a guarantee, so check whether the screen labels its output as estimated or minimum before approving.

Which amount should you compare before sending?

Compare the destination output in the token you intend to hold, after fees, and check its minimum if one is shown. Two routes with the same source input can deliver different amounts because their fees, liquidity and conversion steps differ.

Confirm the destination chain, token and recipient address, then make sure the wallet can cover any destination-chain gas required to use or move the funds. The useful figure for deciding whether a route works is the net destination amount; the source amount tells you what you are spending to get it.