javascript如何实现blockchain区块链数据结构？
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用js写的一个简单区块链代码，实现了数据上链，数据检验，是否被篡改等功能，代码如下:
<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="utf-8">
<title>BFW DEMO JS PAGE</title>
<script id="bfwone" data="dep=jquery.17|crypto-js-3.1.9-1/crypto-js" src="//repo.bfw.wiki/bfwrepo/js/bfwone.js"></script>
<script>
class Block {
constructor(index, timestamp, data, previousHash = '') {
this.index = index;
this.previousHash = previousHash;
this.timestamp = timestamp;
this.data = data;
this.hash = this.calculateHash();
}
calculateHash() {
return CryptoJS.SHA256(this.index + this.previousHash + this.timestamp + JSON.stringify(this.data)).toString();
}
}
class Blockchain {
constructor() {
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by thinkfuture
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