Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c1cc40c9e2062afbe4cb3e59701597d315c64b73f772ede176fe94f0dc790995:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^