PANews reported on May 21 that according to The Block, the decentralized exchange Uniswap responded to the patent infringement lawsuit filed by Bancor, saying that the accusation was "without legal basis." Bancor filed a lawsuit in the Southern District Court of New York on May 20, accusing Uniswap Labs and the Uniswap Foundation of using its constant product automated market maker (CPAMM) technology without authorization for eight years.

A spokesperson for Uniswap Labs said: "The Uniswap protocol code has been open source for many years. Filing this lawsuit at a critical stage in the development of DeFi is a waste of resources." The company's CEO Hayden Adams called it "the stupidest thing I've ever seen" on social media and said he would wait for the legal team to win the case. The lawsuit triggered a strong reaction from the crypto community. Most criticized Bancor for violating the spirit of DeFi open source, but some also pointed out that Uniswap itself had used a business source code license (BSL) to restrict code forks. This dispute comes at a time when the US crypto regulatory environment is undergoing a dramatic change, and it is the first major lawsuit involving patent rights in the DeFi field.