Apart from consuming the libvirt interface this snap packages a tiny vm to be run with libvirt and be able to run some checks. The vm is a solo5 unikernel which is built during snap creation.
As a prerrequisite, a tap interface must be available for the vm to be connected, the default name is tap100 and can be created with ip tuntap add tap100 mode tap ip addr add 10.0.0.1/24 dev tap100 ip link set dev tap100 up
With this in place, the vm would be accessible at 10.0.0.2
Once you execute machine-up, the vm will respond to ping requests.