Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 407e734b042505ddd52d91a9d778eef066171edd9520a184c407e0ae28398753:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^