Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 97344ea01673d1c42001fefdfac06a849027725d448c3c29da5daa0310fcdbe9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^