Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 081e41193d53e173ee687dfb82b4b26f122cf1facb5a13334271ece123270015:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^