Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0db3812193802b678d62925f2ad0ec1dc139872f460999bd7bd70560218b49ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^