Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 07dda908097114e7f77e9bb32548a20df28f7ec1d14e9b7bb89318aa2deec15e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^