Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4f11bf9fad1e22fca3d3e05b408798a9204bcacfda21b91c860a7bb2a9c76ec2:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^