The Ethereum Foundation has initiated a $2 million audit contest for the Fusaka upgrade on the Sherlock platform. The competition, which began on September 15, will run for four weeks. Its primary goal is to conduct a comprehensive review of the Fusaka upgrade to identify vulnerabilities before they can impact the network. In addition to the Fusaka audit contest, there is an ongoing bug bounty program offering rewards of up to $250,000 for discovering significant vulnerabilities.