Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e44a4219aacd3ffd97b9cf792997c139ae48c7097528e3714074be12de255653:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^