Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ebef71142aefe4718a726865050bfaf7db199327571fb74f3026051501db4476:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^