Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dddf7b35e2901307097fbcd67f8b1dce6ec3299ff07de30a59c5e06373904003:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^