Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> df0e37437634363d88e476b5f65fa65ed20c485c1c2ed935f93f1b68d96c127c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^