Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 989ff6399815e1f27f341ba5aab7eab22833263fabeb736b94710c1b6f6f01df:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^