Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ead261582dfac358262390a1153dd4bc491473ad9c9edf8701ef17d27ff05768:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^