Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9e2a18a5a7d0216aea403227cefd370219ce7aa914cfeed69564eba073438ca6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^