Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2ee5dceefee32816d3170c1100887a8eeff7754fc9c56e313d9e4a3652a6cc7e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^