Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 59cde797a36ab4d4e556af731afadbc0ca81e4cb431c5c5d7f919ca893abf777:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^