Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e0e3dad5f3c33e431e80629a5039defe5d2003650645b9a66de64dd53e1c14fb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^