Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 326631ed5216d404aaf75c554fa19bd0e5c04acd85f2c65262e65c92f4dddaa5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^