Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d9d3deef2d3c3c7d0bce3f8e8158060f582f9416466529de61cf77ab1ff27e33:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^