Burwick Law, a crypto law firm, has announced new developments — the U.S. federal court has approved their filing of a second amended complaint in the class action lawsuit involving Pump Fun and related parties such as Solana.

The focus of this lawsuit is quite sensitive: the plaintiffs accuse certain participants of exploiting Solana's validator transaction ordering mechanism, combined with Jito Labs' priority transaction services, to front-run meme coin issuances. In simple terms, they leverage technical advantages and tools to buy in before ordinary users, structurally cutting retail investors out.

This is not a minor issue. Solana has attracted many meme coin projects and traders due to its high speed and low fees, but concerns over fairness have been growing. Validator ordering rights and MEV( (Maximum Extractable Value) have long been pain points for this chain. Now that they are targeted in litigation, it could drive discussions on mechanism reforms within the ecosystem.