Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cbd68c4bd1dd18440381bc3d261c99aa34d9d13c6c768f73f8fd51160695e3bd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^