查询区块链合约代码大全：全面解析与实战指南
区块链技术作为近年来最热门的技术之一，其智能合约功能为开发者提供了无限的创新空间。本文将为您提供一个全面的区块链合约代码大全，涵盖多种区块链平台和编程语言，帮助您快速了解和查询所需的合约代码。
一、以太坊智能合约代码大全
以太坊智能合约代码大全
1. 简单的存储合约
```solidity
pragma solidity ^0.8.0;
contract SimpleStorage {
uint256 public storedData;
function set(uint256 x) public {
storedData = x;
}
function get() public view returns (uint256) {
return storedData;
}
2. 众筹合约
```solidity
pragma solidity ^0.8.0;
contract Crowdfunding {
address public owner;
uint256 public targetAmount;
uint256 public collectedAmount;
bool public isFunded;
constructor(uint256 _targetAmount) {
owner = msg.sender;
targetAmount = _targetAmount;
collectedAmount = 0;
isFunded = false;
}
function contribute() public payable {
require(msg.value > 0,