Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b4c6bda3469a2fce0855e9c786901333b594f685f9aa485bf8d922c7019689af:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^