WireGuard® is an extremely simple yet fast and modern VPN that utilizes state-of-the-art cryptography. It aims to be faster, simpler, leaner, and more useful than IPSec, while avoiding the massive headache. It intends to be considerably more performant than OpenVPN.
This snap packages the wireguard-go userspace executable (https://git.zx2c4.com/wireguard-go/about/) and the wg and wg-quick binaries built from the main repo (https://git.zx2c4.com/WireGuard/about/).
With an overlay, /etc/wireguard is mapped to $SNAP_COMMON - so that's where WireGuard will look for configuration and key files.