Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ac144eab75ebec47b569c60a042898cb51b3f1d1444ca78a4e6b829d55ca1be0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^