Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bcdb48a7d6b04093f29cc449a9e902fe342ad29f894420f51367b437a89e4a17:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^