Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 411baa5d9321156aa257a81ca2cc1a05157cec5a37b3edf21ca1a2f8a1843263:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^