Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ece7897d01c4e888e503fbbbbad9f3d957d7eb25037cdcd501afa759f14ac9e6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^