Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b87ea5e55273575b0199b3c5fed2ce25366e24af9514fd139863403884a8fc55:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^