Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7b6709af7536fd84b887df0fbf3a9a8d03fd4bb20832ad5c10619c7799894707:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^