Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4c95ca2b56f6713eb8022a919c836c83d119df75945b3cc722d51789ad083493:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^