Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3e8eb1b65ee428465accd3bbc33ad2391f8b85461cf48963a69777a5a6a1ed33:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^