Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4e1942f13ff724f37c22634d849c97b945f1e7bbff8c519d669d24b0cdbf179a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^