Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9dad3580ad25395e26157582f1943cd37dd0386faac01d7ca4afcd4ffe7c5530:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^