Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f25ce6fa14dcca1ad6865099423ddfbc984b205a4a859dd81d4f1dce52402ac8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^