Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 573d63da7e122333f0c67b508e57d3d2e328dfe4054b6f2658984356a6acd8b8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^