Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2df7ca25a9f16484a189dc72d98dec021dca97c6fbf10454c173d93f9552db6b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^