Private Interest Intersection

    alj: TODO

    TODO
     
    TODO
     
    TODO
     
    TODO
    }
    TODO
     
    TODO
     
    TODO
    }
    A capability that certifies read access to arbitrary SubspaceIds at some unspecified Path.
     
    The namespace for which this grants access.
     
    The user to whom this initially grants access (the starting point for any further delegations).
     
    Authorisation of the user_key by the namespace_key.
     
    Successive authorisations of new UserPublicKey.
    }