Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> de46e3ecd7d8fb02785babec555b2f9bc4e88bd75c176b4ab00113418e0d01f2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^