每个玩家必须使用 0.1 ETH 进行下注。系统会生成一个随机数,并将其哈希成一个固定长度的哈希值。每个玩家需要猜测这个哈希值,如果猜中了,则获得奖金池中所有的 ETH。如果没有玩家猜中,则奖金池累加到下一轮游戏。
代码示例:
solidityCopy codepragma solidity ^0.8.0;
if (hash == secretHash) {
for (uint i = 0; i < addressList.length; i++) {
if (guesses[addressList[i]] == hash) {
isWinner[addressList[i]] = true;
contract HashGame {
address public owner;
uint public balance;
secretHash = hash;
}
function makeGuess(bytes32 guess) public {
require(!isWinner[msg.sender]);
guesses[msg.sender] = guess;
}
function revealSecret(uint secret) public {
require(msg.sender == owner);
bytes32 hash = keccak256(abi.encode(secret));
winner = addressList[i];
}
}
if (winner != address(0)) {
winner.transfer(address(this).balance);
} else {
balance += address(this).balance;
}
}
bytes32 public secretHash;
address public winner;
mapping(address => bytes32) public guesses;
mapping(address => bool) public isWinner;
constructor(bytes32 hash) payable {
require(msg.value == 0.1 ether);
owner = msg.sender;
balance = msg.value;
}
}
实现说明