Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 77cca7fa1de9074748a72998664eec06478912f51f48b4439a9a142c9101cf35:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^