Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 47ad57f0ff339bd91cfa93faee988eb2a196706c0d7c9780205a017e4056f3f0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^