Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3116b6cf7e02790946513d360559470759001aee3f14734cb6c3f68518c39d5c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^