Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a4a0d090339665b62365abc7d7157172232fbd841e51c9a731acc6e000ea6bd8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^