Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 79cee2cb103fcb6fed9b14167e60146bdf461cb7f4faa27472e8e7b256a5a529:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^