Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 69c9dec960316aace0ff955f7840db792816d72c57597e92d832c7b03051ac07:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^