Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 798cd29e8248e412f88f5b74a2779b52a7725d757d89e9b9c22783342c1056cf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^