Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6f68a107a75b2f0906b2bffb356952dd9d4365bac57765a89e476ba5aa2dd4d2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^