Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 147c8dbc3b3115cc85273b6a85910a1ab0c4062e103937e9cd19019dd0999407:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^