Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fd210c63eba1a705e763f1c34f255bd94fd9cc60d3638ddca79fecdcae651043:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^