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1.游戏名称： 币神争霸
币神争霸是一款预测类竞猜游戏，通过观察BTC价格走势图进行比特币价格预测竞猜。
2.规则介绍：
每期预测时长为2分钟，前一分钟为竞猜时间，后一分钟为等待开奖时间。用户通过竞猜当前的预测数值与2分钟末开奖数值的高低/开奖数值尾数单双/开奖数值尾数数值/这三种预测类型进行下注，并通过调用智能合约进行开奖和奖励分发，中奖概率公平公开。
3.上线状态：否
4.Dapp合约地址：vite_f28701574a794a5d9d8fad9c92de8c67b8f19b777a75d0cf64
5.合约代码如下：
contract CoinWar {
address owner;
event Bet(address indexed from, uint value, tokenId tokenid, uint id, uint gameCode);
event Reward(address indexed from, uint value, uint id, uint gameCode);
constructor() public {
owner = msg.sender;
}
onMessage transferOwner(address newOwner) {
require(owner == msg.sender, "Only owner can call this.");
owner = newOwner;
}
onMessage drawMoney(uint amount) {
require(owner == msg.sender, "Only owner can call this.");
require(amount <= balance(msg.tokenid));
msg.sender.transfer(msg.tokenid, amount);
}
onMessage reward(address winner, uint val, uint id, uint gameCode) {
require(owner == msg.sender, "Only owner can call this.");
require(winner != address(0) && val > 0 && id > 0 && gameCode > 0, "reward error.");
winner.transfer(msg.tokenid, val);
emit Reward(winner, val, id, gameCode);
}
onMessage bet(uint id, uint gameCode) payable {
uint betAmount = msg.amount;
address betAddr = msg.sender;
tokenId tokenid = msg.tokenid;
require(betAmount > 0 && id > 0 && gameCode > 0, "bet error.");
emit Bet(betAddr, betAmount, tokenid, id, gameCode);
}
}
