Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9d6dd3b17611446d408b9a763987111970f6f1267d142a41d0a72b5971a8c1b0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^