Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9e22c15be53111966d280c1af1220816cef93fa6a846461ae44937bcbf323f56:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^