Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 99fe937ef3011c29fd11fcd70890e40602b35115f9bf861912d07ab5c61e28d7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^