Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 73c9fca1d304f8dbe2b4d3011b226bdf160a820a792de865b4fd54ca8369c80d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^