* fix: dont fetch a route for wrap transactions

* refactor logic into useBestTrade

* add mock for useWeb3React

* remove unnecessary diff

* fix tests

* Update src/hooks/useBestTrade.ts
Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>

* Update src/hooks/useBestTrade.ts
Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>

* remove unnecessary wethContract reference

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Co-authored-by: Zach Pomerantz <zzmp@uniswap.org>