Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1de5d07e13127fb70aad347d48642f568843af195ac1005847cf9e5407ba8a08:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^