Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ed6e04932257d38f3be23e2852652ab2d59745c5c6dfc7d9b9561c9f00a6c9a4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^