Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d316ea8ce45a8dbcf47706f738fdb8817488810eadc9c8fd9a58815cc4d3ce98:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^