Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9296ff70b5babdfdcf254d2055a0b8eb5792b192ab014e340ac23b6a33241e14:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^