Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 290598be4327d6f68f35acd7c3d97527aced988999d43227ad83e9bf27001d25:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^