Challenge 5: Slippage Protected Swap

This is the first mini end-to-end CPMM exercise.

Task

Implement protected_swap_output.

Flow

1. Apply the 30 bps fee.
2. Use the exact-in constant-product quote.
3. Compare the result to min_out.
4. If the quote is too small, reject the trade.

Sample Walkthrough

With:

x = 1000
y = 2000
x_in = 100
min_out = 180

You should:

• fee-adjust 100 to 99
• compute output using new_x = 1099
• get 181
• accept because 181 >= 180

Important

Round down during division. Conservative rounding is safer for AMM math.