Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e96b0a83b6a296f7d3d4d43050b85a5b86798ccb5943cd9e06052e3c3f3b153b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^