Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7dea93021371ebd1ac950e156cf4badbfccf36075114948f8becec2b877cfb7e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^