Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 28f166650696127667c75182952981ce44df021df7310db3d958e784c59d50b5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^