Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 018177ed8f85801de57f0e5a7bc7206445a3084d6a77056f8e7ebf014da8b3f3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^