Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fa9e0eca8ce204ed625dc08c139e8b34813878738cd14b651c28de591a04b868:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^