Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9e2050f1f68729cfd18bce7e81636fe20d6778300b1346c8b274689afb96f809:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^