Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b5406f31232d480fab8204292606fba1438309cb1b3a2d41189596cb1145504e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^