Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0dee81662517c61b8fa743fccbfa658585ee89abc6a1887255104e4afaa0825e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^