Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5c214986f1705a29e495a3763bf3b9fe3fe9b88b69fc9268222893260141a3b8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^