Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1d17257fc7072efee8dff2a17bbee3315afafe5fb7f0b4f1948711ce77eafb3d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^