Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e493248663acfeed2866cb4d93097f01f3e15843fb237bc3954042dfba90b741:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^