Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 891dd3c25cb324935eb0ce89c40a6c99503fd014206cffbd0c3b1e9eb80a2be9:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^