Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 92bcff3504b0254221499502121841e055b5bfc679e5fc3a351899ca3bb9f67e:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^