Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 55af1cec2504b5f9dac10fef1be8bc56a5230d61106421572ad6e46e126584bc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^