Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0ac01feb979e87102cc96aaddae50a192076d86a88bae7f4e0e73638008d8c26:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^