Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7d3db346851d1940b9e1834fb2f08feafaaac8787dd74cb3da974ed52ae1ed51:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^