Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e1954f656842e81abbad368ae91a5d7c436aabb7f64961d987f97591cfe409ba:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^