Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6f38f8d40a674422005f1882b0f97ad6ea96143d5bccd37717b93abfa36bb143:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^