Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 08d8ce13210cbdb586ddc2e1d2e2a7b73905acbf6b95d012d2df965e846176b3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^