Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4c560c6363c96d8cfa812bbab11661520d0235197bbbb07a4c56e2a4c29757fb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^