Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 316422684391ca948db2489c57a7ca98d20d767abddb26a99c59ef56b13420eb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^