Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 90f690a1d06b248556efb0de5111155657db862f08f5395a4c0526cbafb88dcd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^