Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5cd725ad713d3f218359af0d8176b844afb5dce167692614e9ab30435d53ade1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^