Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aba8860797d633098f57fa52278be57b54d35d477dd1df1afff0b350f033db17:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^