Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e5a7d2574e7f92c68588f1e7b4d98312cb061eae649d53d6185e40e1d1863d63:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^