Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d3e227532f6cacd21360ea5217ce668f1aab28a6eefc9eaf481ff280a3143045:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^