Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7b55409b034cf1fade542a790e5dcd0825a47945f88f5a51d8131e17d076dcbc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^