Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c1d711c5aa49b399d452ec844a81a340e037074ffc30b678551a8b79bac49cb6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^