Blockchain/Block.html at main · most-improve123/Blockchain · GitHub

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<!DOCTYPE html>
<html lang="es">
<head>
    <meta charset="UTF-8">
    <title>Blockchain Example</title>
    <script src="https://cdn.jsdelivr.net/npm/crypto-js@4.0.0/crypto-js.js"></script>
    <style>
        body {
            font-family: Arial, sans-serif;
            background-image: url('https://images8.alphacoders.com/123/thumb-1920-1239296.jpg');
            background-size: cover;
            background-position: center;
            background-repeat: no-repeat;
            display: flex;
            flex-direction: column;
            align-items: center;
            margin: 0;
            padding: 100px;
        }
        .container {
            width: 80%;
            margin-top: 20px;
            background-color: rgba(255, 255, 255, 0.8); /* Color de fondo para mejorar la legibilidad */
            padding: 20px;
            border-radius: 10px;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
        }
        h1 {
            color: #ffffff;
            display: flex;
            align-items: center;
        }

        h3 {
            color: #000000;
            text-align: right;
            display: flex;
            align-items: center;
        }
        h1 img, h3 img {
            margin-left: 10px;
            width: 40px;
            height: auto;
        }
        form {
            display: flex;
            justify-content: center;
            margin-bottom: 20px;
        }
        input, button {
            padding: 10px;
            margin: 5px;
            border: 1px solid #ccc;
            border-radius: 5px;
        }
        button {
            background-color: #4CAF50;
            color: white;
            cursor: pointer;
        }
        .block {
            border: 1px solid #ddd;
            padding: 10px;
            margin: 10px 0;
            border-radius: 5px;
            background-color: white;
            box-shadow: 0 0 10px rgba(0, 0, 0, 0.1);
            display: flex;
            flex-direction: column;
            align-items: center;
            position: relative;
        }
        .block img {
            width: 40px;
            height: 40px;
            position: absolute;
            top: 10px;
            right: 10px;
        }
        p {
            margin: 5px 0;
        }

    </style>
</head>
<body>
    <h1>
        Blockchain Example
    </h1>

    <div class="container">
        <div id="blockchain"></div>
        <form id="blockForm">
            <input type="text" id="blockData" placeholder="Block Data" required>
            <button type="submit">Add Block</button>
        </form>
        <h3> <img src="https://upload.wikimedia.org/wikipedia/commons/4/46/Bitcoin.svg" alt="BTC Logo">.Palacios</h3>
    </div>
    <script>
        class Block {
            constructor(index, timestamp, data, previousHash = '') {
                this.index = index;
                this.timestamp = timestamp;
                this.data = data;
                this.previousHash = previousHash;
                this.hash = this.calculateHash();
            }

            calculateHash() {
                return CryptoJS.SHA256(this.index + this.timestamp + JSON.stringify(this.data) + this.previousHash).toString();
            }
        }

        class Blockchain {
            constructor() {
                this.chain = [this.createGenesisBlock()];
            }

            createGenesisBlock() {
                return new Block(0, '01/01/2021', 'Bloque Génesis', '0');
            }

            getLatestBlock() {
                return this.chain[this.chain.length - 1];
            }

            addBlock(newBlock) {
                newBlock.previousHash = this.getLatestBlock().hash;
                newBlock.hash = newBlock.calculateHash();
                this.chain.push(newBlock);
                this.displayBlockchain();
            }

            displayBlockchain() {
                const blockchainDiv = document.getElementById('blockchain');
                blockchainDiv.innerHTML = '';
                this.chain.forEach(block => {
                    const blockDiv = document.createElement('div');
                    blockDiv.className = 'block';
                    blockDiv.innerHTML = `
                        <p>Index: ${block.index}</p>
                        <p>Timestamp: ${block.timestamp}</p>
                        <p>Data: ${JSON.stringify(block.data)}</p>
                        <p>Previous Hash: ${block.previousHash}</p>
                        <p>Hash: ${block.hash}</p>
                        <img src="https://upload.wikimedia.org/wikipedia/commons/4/46/Bitcoin.svg" alt="BTC Logo">
                    `;
                    blockchainDiv.appendChild(blockDiv);
                });
            }
        }

        const myBlockchain = new Blockchain();
        myBlockchain.displayBlockchain();

        document.getElementById('blockForm').addEventListener('submit', function(event) {
            event.preventDefault();
            const data = document.getElementById('blockData').value;
            myBlockchain.addBlock(new Block(myBlockchain.chain.length, new Date().toLocaleString(), { data: data }));
            document.getElementById('blockData').value = '';
        });
    </script>
</body>
</html>