Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fadb39d004d7fa5ad71d147562f3753926724ac29588318243430e147ad6c364:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^