public static MaplePacket updateBuddyChannel(int characterid, int channel) {
        MaplePacketLittleEndianWriter mplew = new MaplePacketLittleEndianWriter();
        mplew.writeShort(SendPacketOpcode.BUDDYLIST);
        // 2B 00 14 30 C0 23 00 00 11 00 00 00
        mplew.write(0x14);
        mplew.writeInt(characterid);
        mplew.write(0);
        mplew.writeInt(channel);
        // 2B 00 14 30 C0 23 00 00 0D 00 00 00
        // 2B 00 14 30 75 00 00 00 11 00 00 00
        return mplew.getPacket();
    }