Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 402cfbb4da045abd8863396be2a49938c4cf2535cbfdef7c1c45c3cdc998fcf1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^