Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5920bda5c1568d578676b63286a6497cb1921b7c1eae13939794de97d4a10aa5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^