Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b8bd95d59795a01e35ef10134fd6c6bd339db8023c74a3dfd1f1166be1269557:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^