Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2ec3e015ad01e73152be64d9da165d47371e2afe33044a05f80222286469ac91:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^