post_install() {
    getent passwd i2p &>/dev/null || {
        echo -n ">>> Creating i2p user... "
        useradd --system --user-group --home /opt/i2p i2p
        echo "done"
    }
    post_upgrade
}

post_upgrade() {
    systemd-tmpfiles --create i2prouter.conf
    chown -R i2p:i2p /opt/i2p
}

pre_remove() {
    getent passwd i2p &>/dev/null && {
        echo -n ">>> Removing i2p user... "
        userdel i2p
        echo "done"
    }
}