Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ca67a9f7af22ac01e83a181eff64fde475a7bd736bd012bb6b48ba7b277d3f15:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^