Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bb4785ba4b200ed54fc115565c902163c92e4ba7172dd6509e4ad280e59fcf21:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^