Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 124e1d195772d51ad565c489b0de9cd8ef62fa056db050597225f04ae7c8a97d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^