Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 339beb5131f7bd2062bb2722e3f077dbfad97511e7ad8cd42474bd0ab1951350:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^