v.1.1
- PoW checks implemented - Networking implemented, two instances of Memechain can now be connected to each other and share one blockchain. - Minor front-end changes
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76cfa95202
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@ -7,24 +7,36 @@ from datetime import datetime
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from flask import Flask, jsonify, request, render_template, flash, redirect, url_for
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from flask import Flask, jsonify, request, render_template, flash, redirect, url_for
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class Block:
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class Block:
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def __init__(self, index, timestamp, data, previous_hash):
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def __init__(self, index, timestamp, data, previous_hash, nonce=0):
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self.index = index
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self.index = index
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self.timestamp = timestamp
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self.timestamp = timestamp
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self.data = data
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self.data = data
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self.previous_hash = previous_hash
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self.previous_hash = previous_hash
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self.nonce = nonce
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self.hash = self.calculate_hash()
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self.hash = self.calculate_hash()
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def calculate_hash(self):
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def calculate_hash(self):
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data_string = json.dumps(self.data, sort_keys=True)
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data_string = json.dumps(self.data, sort_keys=True)
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return hashlib.sha256((str(self.index) + self.timestamp + data_string + self.previous_hash).encode()).hexdigest()
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hash_data = str(self.index) + self.timestamp + data_string + self.previous_hash + str(self.nonce)
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return hashlib.sha256(hash_data.encode()).hexdigest()
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def mine_block(self, difficulty):
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target = '0' * difficulty
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while self.hash[:difficulty] != target:
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self.nonce += 1
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self.hash = self.calculate_hash()
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print(f"Mining block {self.index}: Nonce = {self.nonce}, Hash = {self.hash}")
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print(f"Block {self.index} mined successfully!")
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class Blockchain:
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class Blockchain:
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def __init__(self):
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def __init__(self):
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self.chain = []
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self.chain = []
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self.difficulty = 4
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self.load_chain()
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self.load_chain()
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def create_genesis_block(self):
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def create_genesis_block(self):
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return Block(0, "00-00-0000", "Genesis Block", "0")
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return Block(0, "0000-00-00 00:00:00", "Genesis Block", "0")
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def get_latest_block(self):
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def get_latest_block(self):
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return self.chain[-1]
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return self.chain[-1]
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@ -70,10 +82,13 @@ class Blockchain:
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if current_block.previous_hash != previous_block.hash:
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if current_block.previous_hash != previous_block.hash:
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return False
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return False
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if current_block.hash[:self.difficulty] != '0' * self.difficulty:
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return False
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return True
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return True
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app = Flask(__name__)
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app = Flask(__name__)
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app.secret_key = 'lesecretkey'
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app.secret_key = 'lesecretkey'
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blockchain = Blockchain()
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blockchain = Blockchain()
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CONNECTED_NODES = []
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CONNECTED_NODES = []
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@ -87,10 +102,11 @@ def upload_image():
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image_data = base64.b64encode(file.read()).decode('utf-8')
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image_data = base64.b64encode(file.read()).decode('utf-8')
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current_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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current_time = datetime.now().strftime("%Y-%m-%d %H:%M:%S")
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block = Block(len(blockchain.chain), current_time, image_data, blockchain.get_latest_block().hash)
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block = Block(len(blockchain.chain), current_time, image_data, blockchain.get_latest_block().hash)
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block.mine_block(blockchain.difficulty)
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blockchain.add_block(block)
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blockchain.add_block(block)
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if blockchain.is_chain_valid():
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if blockchain.is_chain_valid():
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flash('Image uploaded successfully', 'success')
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flash('Image uploaded successfully.', 'success')
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else:
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else:
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flash('Corrupted blocks detected. Image upload failed.', 'danger')
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flash('Corrupted blocks detected. Image upload failed.', 'danger')
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blockchain.chain.pop()
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blockchain.chain.pop()
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@ -3,6 +3,17 @@
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<head>
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<head>
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<title>Memechain</title>
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<title>Memechain</title>
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
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<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css">
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<style>
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.loading {
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display: none;
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text-align: center;
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margin-top: 20px;
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}
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.loading .spinner-border {
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width: 100%;
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height: 100%;
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}
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</style>
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</head>
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</head>
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<body>
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<body>
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<div class="container">
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<div class="container">
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@ -19,23 +30,35 @@
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{% endif %}
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{% endif %}
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{% endwith %}
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{% endwith %}
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<form action="/upload" method="post" enctype="multipart/form-data">
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<div style="margin-top: 40px;" class="row">
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<div class="form-group">
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<div class="col-md-6">
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<label for="image">Select Image:</label>
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<h2>New Block</h2>
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<input type="file" class="form-control-file" id="image" name="image" accept="image/*" required>
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<form id="upload-form" action="/upload" method="post" enctype="multipart/form-data">
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<div class="form-group">
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<label for="image">Select Image:</label>
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<input type="file" class="form-control-file" id="image" name="image" accept="image/*" required>
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</div>
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<button type="submit" class="btn btn-primary" id="upload-btn">Upload</button>
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<div class="loading">
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<div class="spinner-border" role="status">
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<img style="height: 64px; width: 64px;" src="https://media.tenor.com/I6kN-6X7nhAAAAAi/loading-buffering.gif">
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</div>
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<p>Mining block...</p>
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</div>
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</form>
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</div>
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</div>
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<button type="submit" class="btn btn-primary">Upload</button>
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<div class="col-md-6">
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</form>
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<h2>Connected Nodes</h2>
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<hr>
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<form action="/register_node" method="post">
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<h2>Connected Nodes</h2>
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<div class="form-group">
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<form action="/register_node" method="post">
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<label for="node_url">Node URL:</label>
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<div class="form-group">
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<input type="text" class="form-control" id="node_url" name="node_url" required>
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<label for="node_url">Node URL:</label>
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</div>
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<input type="text" class="form-control" id="node_url" name="node_url" required>
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<button type="submit" class="btn btn-primary">Connect Node</button>
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</form>
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<ul id="node-list" class="list-group mt-3"></ul>
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</div>
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</div>
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<button type="submit" class="btn btn-primary">Connect Node</button>
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</div>
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</form>
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<ul id="node-list" class="list-group mt-3"></ul>
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<hr>
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<hr>
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<a href="/sync_chain" class="btn btn-primary">Sync Blockchain</a>
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<a href="/sync_chain" class="btn btn-primary">Sync Blockchain</a>
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<hr>
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<hr>
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@ -64,7 +87,6 @@
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blockchainDiv.appendChild(blockDiv);
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blockchainDiv.appendChild(blockDiv);
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});
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});
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});
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});
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fetch('/nodes')
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fetch('/nodes')
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.then(response => response.json())
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.then(response => response.json())
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.then(nodes => {
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.then(nodes => {
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@ -75,7 +97,10 @@
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listItem.classList.add('list-group-item');
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listItem.classList.add('list-group-item');
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nodeList.appendChild(listItem);
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nodeList.appendChild(listItem);
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});
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});
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});
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});
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$('form').on('submit', function() {
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$('.loading').show();
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});
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</script>
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</script>
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</body>
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</body>
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</html>
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</html>
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