Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6175972e86c9220f31b90df314e33f9b290b8910fa03a5f1469eeadb7c80c7aa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^