Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 221429a9431f265a9201caafccbbaae99717bdfe21836e39c6dba88a07566637:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^