Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 69e1b3df92731770e7d71f96dfea1971d21c9f6c559cc20967365abd4c6ba1db:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^