Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3392bbf5a620100f70fb6e3a7a78546c2730cb84a22ae06a4df17a7f128cf65d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^