Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9968d14a7a3a4e4d9106ffb53234251fb365b292ad2831c973014729fb78ead8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^