Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 99a220958205734acbb49767c6d6f00ca3238855b3af27c4fd9ac625ed72424a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^