Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 93ad3d505d9469513f6927e5482bb733428830937078262f83b12f7330bb22cb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^