Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2b29563ae4ff8245a1ec93efb616a28c6b566dd3e1024c6c7f17f6464c2e1930:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^