Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e559ad4b0aa905135ae683f92c4470e95efbc6d25763e48816326cda60696f2c:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^