Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 29ee7d1f1fd20b9b17ae75c409d224679a8d83b8c5074827ad6dc9923decf434:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^