Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 41ca463ee1c77761fe8fc345d9a9587eb5d95175e4998b38cfceff57ab064680:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^