Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 75ec787e0fbc9095f384fd150104438dc42e276b447855f12d87fd837b2871bc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^