Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e5fde275fec35e042644a8e470c80c0c9f8823fb9e698dcf452f005b16fc62a5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^