Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a5a9bdec0723d852672cb288ab9fba4828550812be250a3d6a8f204a63d7a7aa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^