Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d3035801d2cbeb79fac887e7a28f32bbbf22bdc88bddd863d0877330c71de5e3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^