Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 64f06d7d3ea6b0d4aaeb51946599cc517841d682f7de282b5aea82b791709491:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^