Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 14074809979ada28713b0444117c42808948da71b939c0a3eb982dafe4c4813b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^