Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 115008a187ffb58052a9d3fa9f4c35e14c8019b64380038e4ecb035656702cc4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^