Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8a626a87e76f2afc19003274d9056043181896986bd6bd7bb9efcfa41598c7a7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^