Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1d43840f130367aff4959a8611a149a1849643d1c69514bf92b87a28396b33f6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^