Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 044fb95bc476ad534f9019776d18520cfc518cb31e93d6f7ebc0474aabdbc0d0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^