Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bb49463b5bab396a535a9de5fe5846d8f63f40af5b57c85faa69d6cab635df1e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^