Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 48e5ea7b1a46e4e9109f2de017f26fad697915cbd8a43ef70891ffc23ed56b11:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^