Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 748804b3c8224980de66bc1d059e6681255d956058a553a2147d189139bb19e4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^