Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2e6a1315ad182082918c8d28cc66aa9059d9294a110fb29aba4627a127fd6e0c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^