Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0b2605f59e8f6fb7392a3b84b0d365adb6fe5c48c21c15b5dd65b51173653f07:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^