Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 457d652e55169665ff8b86df64c2360aaf6f8c7d4ee225fff99288ce07891df9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^