Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7a72ac29c5cb6ab6cbbd04b18bca281e6181efb755cafdeea62e4f717723f4a4:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^