Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 756a2afca314d61bec6bde091251b193665164e9fa594f07c71137dd02d7cc6c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^