Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e1f20950cb6bbdf01d748fbb8f1af9022edba018e5acdba79749f2deef6525fd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^