Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 10406531a29ad4965789785c8d380648638d4c675991f90c8b6985dcc8091e5a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^