BitSharper.Discovery.IrcDiscovery.ParseUserList C# (CSharp) Method

        internal static IList<EndPoint> ParseUserList(IEnumerable<string> userNames)
        {
            var addresses = new List<EndPoint>();
            foreach (var user in userNames)
            {
                // All BitCoin peers start their nicknames with a 'u' character.
                if (!user.StartsWith("u"))
                {
                    continue;
                }

                // After "u" is stripped from the beginning array contains unsigned chars of:
                // 4 byte IP address, 2 byte port, 4 byte hash check (ipv4)

                byte[] addressBytes;
                try
                {
                    // Strip off the "u" before decoding. Note that it's possible for anyone to join these IRC channels and
                    // so simply beginning with "u" does not imply this is a valid BitCoin encoded address.
                    //
                    // decodeChecked removes the checksum from the returned bytes.
                    addressBytes = Base58.DecodeChecked(user.Substring(1));
                }
                catch (AddressFormatException)
                {
                    _log.WarnFormat("IRC nick does not parse as base58: {0}", user);
                    continue;
                }

                // TODO: Handle IPv6 if one day the official client uses it. It may be that IRC discovery never does.
                if (addressBytes.Length != 6)
                {
                    continue;
                }

                var ipBytes = new[] {addressBytes[0], addressBytes[1], addressBytes[2], addressBytes[3]};
                var port = Utils.ReadUint16Be(addressBytes, 4);

                var ip = new IPAddress(ipBytes);

                var address = new IPEndPoint(ip, port);
                addresses.Add(address);
            }

            return addresses;
        }