Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b0911e62eb4de58faeb56eaed3fc70b25e0c15ff3bc1df4552fd95c06c51451e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^