Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9923b986d59a7eaffbdb2798541995974d1ed09730eed1d3de93e018d9a1f52b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^