Uniswap's victory in court declares that decentralized platforms are not responsible for scam projects

Original | Odaily Planet Daily (@OdailyChina)

Author | jk

On March 3, 2026, Judge Katherine Polk Failla of the Southern District of New York officially dismissed the second amended class action lawsuit against Uniswap Labs and its founder Hayden Adams, with prejudice, meaning the plaintiffs cannot refile the same claims. This legal tug-of-war, which began in 2022, has now come to an end.

Case Origin: Victims of Scam Tokens Cannot Find the Defendants

In April 2022, a group of investors led by Nessa Risley filed a class action lawsuit. They claimed to have suffered losses trading tokens on the Uniswap protocol, tokens involved in typical crypto scams such as rug pulls and pump-and-dump schemes—meaning project teams artificially inflated prices and then sold off, leaving ordinary investors with nothing.

The problem was that most of these scam token issuers were anonymous and untraceable. As a result, investors shifted their focus to the targets they could identify: Uniswap Labs, founder Adams, the Uniswap Foundation, and three well-known venture capital firms—Paradigm, Andreessen Horowitz (a16z), and Union Square Ventures.

The core argument of the plaintiffs was: Uniswap provides a marketplace that facilitates trades between buyers and sellers, thereby enabling scams to occur and should be held jointly liable.

Three Years of Legal Battles: Federal Claims Fail First, State Claims Fail Next

The lawsuit progressed in two phases.

First phase (2023): The court dismissed all federal securities law claims, citing the plaintiffs’ inability to prove that Uniswap, as an unregistered securities exchange or broker, engaged in violations. The judge wrote a widely cited statement: “The creators of smart contracts should be held responsible for third-party misuse of decentralized platforms, which defies logic.” In February 2025, the Second Circuit Court of Appeals upheld this ruling but remanded the remaining state law claims for reconsideration.

Second phase (March 2026): The plaintiffs revised their strategy, focusing on six state law claims, including aiding and abetting fraud, aiding and abetting negligent misrepresentation, violations of consumer protection laws in New York, North Carolina, and Idaho, and unjust enrichment. However, all six claims were again dismissed.

The court found that:

• The plaintiffs failed to prove that Uniswap Labs had actual knowledge of the specific fraud at the time: user complaint emails arrived after the trades, and social media warnings were directed at other investors, not the defendants;
• Uniswap Labs did not activate protocol fee switches during the relevant period and did not profit directly from the trades, so unjust enrichment could not be established;
• In 2020, Uniswap published a blog post acknowledging the increasing difficulty of distinguishing scam tokens from legitimate ones, and included disclosures in its terms of service—these constituted public warnings, not deception.

Judgment: Providing Infrastructure Is Not the Same as Assisting Fraud

Judge Failla explicitly stated in the ruling that the plaintiffs’ theory of liability was based on the premise that Uniswap “facilitated” fraudulent transactions. The court did not accept this logic.

The ruling states: “Merely creating an environment where fraud could occur does not amount to active assistance.” Developers writing open-source smart contract code and deploying it on decentralized networks are free to use it; this is fundamentally different from traditional financial intermediaries controlling user assets and overseeing transactions.

Brian Nistler, legal head of Uniswap Labs, called this ruling a “pioneering precedent” in DeFi on X (formerly Twitter). Adams himself commented briefly: “If open-source smart contract code is exploited by scammers, the responsibility lies with the scammers, not the developers who wrote the code. This is a good, reasonable outcome.”

Subsequent Impact: Legal Shield for DeFi Protocols and Launchpads

The impact of this ruling extends beyond Uniswap.

In the crypto industry, many DeFi protocols and launchpads face similar legal risks: users trade scam projects on these platforms, suffer losses, and then sue the protocol itself. This ruling establishes a key legal principle: as long as protocol developers are not active participants in the fraud and cannot prove actual knowledge or substantial assistance, platforms are not liable for third-party scams.

Protocols like Aave, Compound, liquidity platforms like Curve Finance, and various token issuance and trading launchpads rely on open-source, permissionless architectures similar to Uniswap. If courts were to treat deployed code as acting as a broker, the entire DeFi industry would face a fundamental legal crisis. This ruling significantly reduces that risk.

However, legal experts caution against excessive optimism. Judge Failla acknowledged that the plaintiffs’ damages are “genuine and tangible,” but current laws do not hold protocol developers accountable. She explicitly stated that policy issues fall within Congress’s jurisdiction, not the judiciary. This means that if Congress enacts legislation specifically regulating DeFi platform liability in the future, this precedent’s protective effect could be nullified.

Additionally, the ongoing criminal case involving open-source code, Tornado Cash, remains a key reference point for the industry.

Market sentiment: After the ruling was announced, Uniswap’s native token UNI rose about 6% on the same day, briefly reaching $3.97.