Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 281eb24797dbffa6bf4fb9665241fdeb24443d299334f65039e5b7ffcb022d4a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^