U.S. Court Rules: Uniswap is Not Responsible for Scam Tokens; Open-Source Smart Contracts Are Neutral Tools

New York Federal Judge Dismisses Class Action Lawsuit Against Uniswap, Establishing Important Legal Precedent for DeFi Industry

(Background: Uniswap Wins! Judge Dismisses Bancor Patent Infringement Case: AMM Pricing Formula Considered an “Abstract Concept” Not Patentable)

(Additional context: $UNI Surges 23%! BlackRock Announces Purchase of Uniswap’s UNI Tokens, BUIDL Platform Also Listed on Uniswap)

Table of Contents

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• Judge: Uniswap is a Neutral Tool Like Email
• Industry Reaction: Landmark Ruling for DeFi
• UNI Price Moves with Market Trends

After a legal battle lasting four years, leading decentralized exchange Uniswap finally receives good news. On the 2nd, U.S. District Court Judge Katherine Polk Failla officially dismissed the class action lawsuit against Uniswap Labs and its founder Hayden Adams, ruling that open-source smart contract developers are not legally responsible for third parties issuing fraudulent tokens using their code.

Notably, this ruling has “res judicata” effect, meaning the plaintiffs cannot refile the same claims.

Judge: Uniswap Is Like Email, a Neutral Tool

The lawsuit was filed in April 2022. The plaintiffs accused Uniswap platform of being rife with “Rug Pulls” and “Pump-and-Dump” scam tokens, claiming Uniswap Labs should be responsible for their investment losses and that the platform operates as an unregistered securities exchange.

Judge Failla’s ruling highlights several key points. First, the plaintiffs failed to prove that Uniswap had actual knowledge of the scams. Second, providing neutral open-source code does not constitute substantial assistance in illegal activities. The judge compared the Uniswap protocol to email— a “neutral tool”— emphasizing that offering a protocol does not equate to aiding fraud.

At the same time, the judge found it “illogical” to hold smart contract authors responsible for third-party misuse of their code. This means the actions of developers (writing code) and illegal third-party activities (issuing scam tokens) must be clearly distinguished legally.

Regarding the legal process, claims under federal securities law were dismissed as early as August 2023, and the appellate court upheld this ruling in February 2025. The March 2026 decision addresses remaining state law claims, including aiding and abetting fraud, negligent misrepresentation, and violations of consumer protection laws, which were ultimately dismissed.

Industry Reaction: Landmark Ruling for DeFi

Uniswap General Counsel Brian Nistler stated, “This is a landmark ruling for DeFi.” Founder Hayden Adams also issued a statement:

If you write open-source code that is exploited by scammers, the legal responsibility lies with the scammers, not the developers.

Overall, this ruling provides legal space for open-source software and new DeFi projects. However, for investors, the developer’s immunity also underscores the importance of “DYOR” (Do Your Own Research), as the law will not automatically compensate users for losses in decentralized environments.

UNI Price Moves with Market Trends

Regarding the token price, UNI has mostly followed Bitcoin’s trend recently, briefly surpassing $4 last night; as of press time, it’s around $3.9, up 2.7% in the past 24 hours.