Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c9046bef6accd1cf9821b40a8a6225f5031b8bb8cb44cf83e72c827996420d1a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^