Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e88ad8dde31a73646790b5d1bd058a03842c4ba0329629ab2f612d207e9dbc60:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^