Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e9bcf77a44b30fd347d9696b2465bdb2b125946ef1bb10f10a65cf77319a0dff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^