Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d0cf8f6ea0916850be03be5ce3d239c2e98833599d122ce052ce68db4a4170c2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^