Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 44dfc99c8008c8cb845f7bc3d1a59144cc9a2380ff79324b167f05b9b0dbf392:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^