Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 23d7b7f9157754b351d51226a001060b4a15707609df0bad6744c1e008736990:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^