以太坊竞猜合约开发源码规则

简介: 以太坊竞猜合约开发源码规则

以下是一个简单的以太坊竞猜合约示例:

pragma solidity ^0.8.0;

contract BettingContract {
address public owner;
uint public nonce;
uint public lastBlock;

event Bet(address player, uint betAmount, uint blockNumber);  
event Win(address player, uint betAmount, uint blockNumber);  

function bet(uint amount) public payable returns (bool) {  
    require(block.number > lastBlock, "Too early");  
    require(msg.value >= amount, "Not enough ether");  

    nonce++;  
    address player = msg.sender;  
    uint bet = amount;  

    require(player.send(bet), "Send failed");  
    emit Bet(player, bet, block.number);  

    if (nonce == 1000) {  
        uint winner = randomNumber(player);  
        emit Win(winner, bet, block.number);  
        lastBlock = block.number;  
    }  

    return true;  
}  

function randomNumber(address player) private returns (uint) {  
    // Generate a random number between 1 and 1000  
}  

}

这个合约包含了一个公共的owner地址,用于管理合约。nonce是一个公共变量,用于跟踪合约收到的赌注数量。lastBlock是一个公共变量,用于跟踪最后一个获胜者的赌注。合约还包含了两个事件,Bet和Win,用于记录赌注和获胜者的信息。

bet函数是一个公共函数,用于接收玩家的赌注。它首先检查赌注是否足够,然后增加nonce计数器,记录玩家和赌注金额,并将赌注发送回玩家的地址。如果nonce等于1000,合约将生成一个随机数,并选择一个获胜者。获胜者将收到他的赌注,并将lastBlock设置为当前区块号码。最后,函数返回true表示赌注已成功下注。

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