Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 323c273354ab046e41fbe9ebf8791ad295aa364d54ca4786719fd52ddd3249e9:16:32
   |
16 |                                 var total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^