Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e9606e86df296f8d987795a2cc1781788d4c9810bab4d1368941b518c3ce6d3c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^