Licenses

Each node in the ContentGraph can have a license specified for access and for reference. These licenses are smart contracts that follow the IAuthorization interface:

interface IAuthorization {
    function auth(bytes32 id, address user) external view returns (bool isAuthorized);
}

This interface means that authentication for a user attempting to access content can be done through a simple read from the ContentGraph.sol.

Content can then be gated by checking the users auth state using the ContentGraph.sol method auth(bytes32 id, address user). The check for a user's auth state will be delegated to the attached license.

See Gating Content for more info.

License Types

At this time there are 5 license types:

• Public: A license that allows any user to access the underlying content.
• Private: A license that allows for no user to access the underlying content.
• AllowList: A license that allows for a subset of users on the network to access the underlying content.
• TimeBased: A license that allows for the configuration of a dynamic price, based on the time of purchase of access.
• TokenBased: A license that allows for the configuration of a set token balance of a user in order to access the underlying content.

Additionally there is a 6th license, the Authorizer license, which allows for the combination of these licenses with a boolean expression.

See License Types for more info.