Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c8f9d307509e217d8231ca7c3d51b92b4755d9b9a3638010532a6073af4a67b8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^