Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0c8d8578eb24c32adfe987cde98ba2ed7b890577eafafeb085a5f3d1b170329d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^