Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f8ba85cd710a2f6255cdc990a6d0d3967c4a301c3def104ae963f8020fafb820:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^