Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3c20672197190684f4e3c058ca251e140db8acfb39665f8bae85d6c8038ead8e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^