Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 19c974ce9bed91f43a9a9aa561b008cd8ccb5a7d995ac9ac92247d7c83c5e224:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^