vault.*. The first two fire for vault sessions you created and for links you sent with POST /api/v2/checkout/vault_link. The third fires for permissions users gave your app through its vault links.
A vault session linked to a user, a card landed in their vault, and their permission for your app to pay changed.
vault.*. The first two fire for vault sessions you created and for links you sent with POST /api/v2/checkout/vault_link. The third fires for permissions users gave your app through its vault links.