Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ab595c2ad88193216a61c8cfdc366cb133aa2ed837926369457860a2da2bd0ed:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^