A whitelist contract is a feature used in blockchain projects, especially during token sales or initial coin offerings (ICOs). It is a way to control who can participate in a sale or access a specific service.When a project creates a whitelist, they maintain a list of approved wallet addresses. Only these addresses can buy tokens or take part in other activities, such as accessing restricted platforms or features. Whitelisting helps to ensure that the project can manage participation, prevent bots or unauthorized users, and build a more engaged community.To get on the whitelist, users often need to complete steps set by the project, such as signing up on a website, verifying their identity, or holding a certain amount of tokens. This process enhances security and fosters trust among participants, as it can help prevent fraud and reduce the risk of pump-and-dump schemes.In summary, a whitelist contract is a tool that allows project teams to regulate access and promote fair participation during key phases.