Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c76a8b99c96671f79790c1d96c5c89ab47116f0c942b43592a4d014a088fb105:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^