Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bd2f72e6975e9085e2136df30e330747f294808343513ba74aef3d313bf737a1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^