Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 599f2302011188d0e095a1736ac56dea82df52bc0c078d3421306b4b9b8cb59e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^