Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b95f6f418da257a9a20f8a676f7785ee0dbd15ff2795d7bbee051a8b95c41f43:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^