Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 48f9c72889a3d74a3000f1c3c86deed1e7db8c71cca80de84ae0234d0349ff58:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^