AMM v4 (Constant Product)

Legacy program (most deployed contract on Solana). Originally shared liquidity with Serum/OpenBook order books, now functions as standard AMM.

AMMv4 is Raydium’s original constant-product automated market maker and the most widely deployed Raydium contract on Solana. Often referred to as the hybrid AMM, it historically shared idle liquidity with a central limit order book (first Serum, later OpenBook) to improve capital efficiency.

Today, all AMMv4 pools operate purely as traditional constant-product AMMs, providing full-range liquidity and fungible LP tokens. AMMv4 remains a battle-tested option for simple liquidity provisioning and long-tail trading pairs.