Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 833f6f0c87926ee40f13361053539cc613e7b77b9c5f7468f23c82233a4c0d0b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^