Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5b579fb41c9debbcdbee795ea48fefb96ed544681e8bdf531d47f0f1af869a21:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^