Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b8d19aa2a514731368468d09ef59aa90964aa0cd4b6b80966e4a616c5097a5e2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^