Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3a766294b84806f53d919021f90f1bd4fb32bfcc9e615d8423eba035ee489d5d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^