Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0cbb2971611b40e52c95f4da617dace89b266a782242874a9c3af9ba8561167f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^