Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e7c882dee71dc89ed04fdbcb1fa64786e7e65568a2c530140d8243d98b6afb40:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^