Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3a8ab51ff305c0a7b139e580981a2127d295d59e12b22418eabf1c7bec2b08e4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^