Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b523a8c2f619231f6f0168e41345128e17a515b41583e28d098697f4aab9bc49:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^