Fix crosschain native value

[BrodyHughes]

Fixes BX-1755
Figma link (if any):

What changed (plus any additional context for devs)

assetToSellWithPrice was incorrectly using assetToBuy?.uniqueId instead of assetToSell?.uniqueId. We only use this data when we create the object for parsedAssetToSell, which is returned as the assetToSell in our swaps flow.

Using assetToBuy?.uniqueId in assetToSellWithPrice caused us to check the native token price on the output chain instead of the input chain. This would only be noticeable for cross-chain swaps between chains that don't share a native token price.

Screen recordings / screenshots

Screen.Recording.2025-02-04.at.4.09.47.PM.mov

What to test

• do swap price data work as expected for normal, crosschain, and wrapping / unwrapping?

[linear]

BX-1755 Bridging from Base to DMT causes bad prices to get displayed

[derHowie]

nice find! now we gotta figure out why we're seeing NaN for gas fee at the end of the video 😅