Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8613b81cb999dd124ccd04d3c3dc27fde605b8eedbba9d68e77bb48449ded2b1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^