dnfdaemon

dnf-daemon is a 2 DBus services there make part for dnf's API available for application via DBus calls. There is a DBus session bus service running as current user for performing readonly actions. There is a DBus system bus service running as root for performing actions there is making changes to the system This makes it easy to do packaging action from your application no matter what language it is written in, as long as there is DBus binding for it. dnf-daemon uses PolicyKit for authentication for the system service, so when you call one of the commands (as normal users) you will get a PolicyKit dialog to ask for password of a privileged user like root.