Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c5abdc28510154824b80c856cfb18666e32fcf2bd6ed3c13f91494fa494485ce:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^