Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fc73ffb39052903d8475a66448d453b708c61378ec5b0d90ac960aef4dc5cef9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^