Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a2e8a9444392b4191033666dad99772cbada5a5b3304767dc4a3023f81bd0db6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^