Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 23313469a32649dec8355af7e6520b3762e14bde3814e553a3525d6d809af487:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^