Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d85fbffe4c7a882762f029a84f7b0b7e05fffcc36707625336482c961c75d579:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^