Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9da76565f4204565a2d58d3e014f6591cb7ddd0f3f510f953a972d449cc3aef4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^