Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bdc42ddaf6ecbe28feb02a9d88941224fa44534bb11d9e55da8906af35d7c795:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^