Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> af1a8b8457ec63b9143904ad47725678464790fbced69d91f9a99aedae89189b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^