Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d511a8454daae0e0674b4bf6fec0540df6506f495ec5033c65fd12b23cdf56d7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^