Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3deb025b9ce01c13ebf022b2ba41c5b4b422aa610722a59a2431c0126b8ea715:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^