Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 059993a124795454edf02f02f1ae92b5afce2fa289884d341358a1870a0d757b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^