Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2759036469df8a3631e55c56bad500f0a3b1cb7f3c9689a3e0ff3b821207ec82:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^