Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cf21c253c41e723502742b787953b6eddcd0746d8f1ba8162294abe37517e902:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^