Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7173164c5b8583f90621bee9d6e6a6676e2ab73999d8837a1cd61109e07e3820:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^