Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e5d88fa60eb234e297259302e3f2f8cb5ecadfb17d3b91a01610b2602aeddd96:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^