YouChain可验证发牌demo规则公示

shuffleBySeed

洗牌随机数生成规则：
洗牌随机数由三个玩家的公钥、预言机随机数、牌局id顺序拼接而成，其中玩家的公钥按照玩家进入牌局的顺序进行拼接；
将拼接后的字符串转为16进制得到该牌局的洗牌随机数；

public static String getRandSeries(String pubKey1, String pubKey2, String pubKey3, String id){
	SecureRandom random = new SecureRandom();
	String randSeries = byte2HexStr((pubKey1+pubKey2+pubKey3+random.nextInt()+id).getBytes());
	return randSeries;
}


public static String byte2HexStr(byte[] bytes) {
	char[] chars = "0123456789ABCDEF".toCharArray();
	StringBuilder sb = new StringBuilder("0x");
	int bit;
	for (int i = 0; i < bytes.length; i++) {
		bit = (bytes[i] & 0x0f0) >> 4;
		sb.append(chars[bit]);
		bit = bytes[i] & 0x0f;
		sb.append(chars[bit]);
	}
	return sb.toString().trim();
}

抓牌规则:
洗完的牌按照玩家进入牌局顺序轮询抓给玩家，每次一张，抓完为止；


洗牌算法公示：
public static Integer[] shuffleBySeed(String shuffleSeed) {
    //将一副新牌映射为1-54的数组
    Integer[] newCardsArray = {1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23,24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,41,42,43,44,45,46,47,48,49,50,51,52,53,54};
    List<Integer> newCardsList = Arrays.asList(array);

    //引入自定义种子
    SecureRandom random = SecureRandom.getInstance("SHA1PRNG");
    random.setSeed(shuffleSeed.getBytes());
    
    //洗牌
    Collections.shuffle(newCardsList, random);
    return (Integer[])list.toArray();
}