Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b6d1abd7ac265d425109fbbd92c51feeb3126b60f51f32409d8b7adc6e5c6995:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^