Swap Into a Liquid Asset Before You Bridge

Before bridging crypto, swap into an asset that the bridge supports and people can trade on the destination chain. This can make it easier to use your funds after they arrive, but the right asset depends on the route you plan to take.

A bridge moves value between blockchains; a swap trades one token for another. Some routes combine both steps, while others require you to swap first, bridge, then swap again. For a fuller explanation of how the steps fit together, see Biswap’s guide to cross-chain swaps and transfers. The key is to check the exact route before you trade.

What should you swap into before bridging?

Choose an asset that is both supported by your bridge route and liquid on the destination chain. Liquidity means how easily you can trade an asset without moving its price much. A stablecoin, whose price is designed to track another asset such as the US dollar, may be useful if you want to keep a steady value during the transfer. But it only helps if it is available on both sides of your chosen route and has active markets where you plan to use it.

Some bridges accept only certain tokens or turn the incoming asset into a different version on arrival. A wrapped token is a blockchain representation of an asset held or backed elsewhere. It may track the same value, but it is not always interchangeable with every other version of that token. Check the asset name and network shown in the bridge before you confirm.

How do you check the route and costs?

Start with the chain where your funds are now and the chain where you want to use them. Then check whether the bridge accepts your current token, what asset you will receive, and whether that asset has a usable market on the destination chain. If you need to swap before bridging, compare the amount you would receive after the swap with the route’s quoted amount for a direct transfer.

• Check the supported source and destination networks.
• Confirm the exact token and network you will receive.
• Review swap fees, bridge fees, and the quoted exchange rate.
• Keep enough of the destination chain’s gas token to make later transactions.

Slippage is the difference between the expected trade price and the price you get. A thin market can make that difference larger, especially for a big swap. A route with fewer steps may be easier to follow, but a direct route is not automatically cheaper or more liquid.

When is swapping first the better choice?

Swapping first makes sense when your current token is not accepted by the bridge, or when the bridge supports an asset that is easier to trade on the destination chain. It may also help you avoid arriving with a token that has few buyers or sellers. Compare the full route, since an extra swap adds another fee and another point where the quoted price can change.

Before sending a large amount, check that the route and token details match your plan. If you have not used that route before, a small transfer can show whether the asset arrives as expected and whether you can trade it on the destination chain. The best pre-bridge swap is the one that leaves you with an asset you can actually use there.