Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d77718a0e554f60ff39e3eaf7c209030697b99e3963bb3951d3753194948edf8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^