Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dec117854baaa7216340b7f1b0b8a635dd5d2ed42dc9fee64a43c34e192b3496:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^