Merge pull request #358 from LIT-Protocol/fix/uniswap-native-bal-check

Fix logic errors in Uniswap `precheck` method

Author: spacesailor24

.nx/version-plans/version-plan-1759893703854.md

@@ -0,0 +1,5 @@
+---
+ability-uniswap-swap: major
+---
+
+The nativeTokenBalance, tokenInAddress, tokenInBalance properties of the Uniswap Ability Precheck success response have been made optional and can now possibly return undefined