Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 820be7015ad5434a19aba3a105f075f81ec56a40b1d75f83447c66ccc5f18284:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^