Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3a23fd3a8dab2ca4f60f7febffe9155e30d156da0a4aeeedcf89cff2a466130e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^