Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 15b920a0535ecdc10dd0865b68986727da1215fc39f290b2f73845c8cfac76af:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^