Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3b5ff258f1f81900292d992483703cf31f34171de1cbf218aa41a49ecf28c330:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^