Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d158b9f4489d7d160ffe88dffd042e17390a9a1f1427cba98a08dea3349f7f8c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^