Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 79e648b1b8a22298747a4d6675764dd67a8f917f5163f7bd9afaec4d00464b5f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^