Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 86f62c4a572c89a8ff489340e15676a9c904382bb7acdf82ebc146969f0c8231:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^