Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5322faeabeb0ef2af543b25e1a8126a10acfe5a9af016e58eb79fd003b5b80a9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^