Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aec85a1922aef32816a3e1db7ce3db8b60eb8496c67d144c07e8bd511736ef00:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^