After a simmering feud that reached soap opera proportions, Yahoo and the Alibaba Group, the Chinese Internet company it partly owns, have reached an agreement over a Chinese payments processing company.

With SoftBank, another major investor in Alibaba, the companies announced on Friday a multipronged deal that guarantees Alibaba certain payments in the event of a public offering of the payments company, Alipay, or another liquidity event.

If Alipay goes public, Alibaba will be paid at least $2 billion but no more than $6 billion, plus certain licensing fees. Under the agreement, Alipay has also agreed to maintain its current relationship with the Chinese online retailer Taobao, one of Alibaba’s top e-commerce companies. “Over the last few months, we have worked cooperatively with our partners at Yahoo and SoftBank to reach an agreement that serves the interests of all parties,” Jack Ma, Alibaba’s chief executive, said in a statement. “Most importantly, Alipay was able to secure the license it needed to continue operating.”

The resolution is a welcome one for the Alibaba’s investors Yahoo and SoftBank, which have been trying to reach a deal with Alibaba for several months. Last year, Mr. Ma spun Alipay out of Alibaba to secure licenses to operate as an electronic payments platform, amid new regulations in China. The company’s partners cried foul in May of this year, with Yahoo and SoftBank claiming that they had not approved the spinoff and only learned of the deal in March.

The debacle irked investors, who were bothered by Yahoo’s lack of knowledge and the loss of Alipay’s value to Alibaba’s portfolio. David Einhorn, the influential hedge fund manager of Greenlight Capital, dumped his entire stake in Yahoo, saying in a letter to investors that this “wasn’t what we signed up for.”

Yahoo’s 43 percent stake in Alibaba is considered by many to be its crown jewel, worth more than the company’s domestic business, which has struggled against rivals like Google.