documentation says it all: "bytes address; // BE encoded 4-byte or 16-byte address (size determines ipv4 vs ipv6)"[0] [0]: https://github.com/ethereum/devp2p/

documentation says it all: "bytes address; // BE encoded 4-byte or 16-byte address (size determines ipv4 vs ipv6)"[0] [0]: https://github.com/ethereum/devp2p/blob/master/rlpx.md https://github.com/ethereum/devp2p/blob/master/rlpx.md