Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3454b2afbd7f12a3f489a39c1de4ca3a414ea5c3d5f3a5d33fc69d56e35788e2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^