Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0ee11884567bfdd3c908660a6d1fe8e85bd0b08fa20cbfbbd6599165f4558e11:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^