Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3d8de234ab8ac7873e6967db69c725826ad281e4163ec1a576ec8104f3cd212f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^