Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e8bcb0c963ffee38040242c5dee43405730401a67252d3ae73f8085ceee21a21:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^