Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 123684a640f1d2f5d48161777e4a4c168c44bc08f4d55f1df12a1513ad18e39c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^