Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d330ddd9a66794c1fb1f9abddb9eca6d95b3a67996046d10326e2eb7b772124b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^