Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0cf7e3d7cced4b33e73bfb022a6ab7658a1287ab24926b1e12bd073555b5aea4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^