Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 778a1f42942d88939016fe8d2b19bf91d022a895a7358e3fc86da27d150f1f59:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^