Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 499686ab4388d559c89ef4b97202b2418e22330a4c6acf7af9159649a295c657:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^