Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2924811360cf11331f25dd3c7559c64081e3e3a7358b257f04859b5dceaf2b19:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^