Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f677bb199a322e06aa6762513d4510ff74a0494d78f59cffdbbb65dce8a7e61f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^