server-5000.py

#module
from uuid import uuid4
from blockchain import BlockChain
from flask import Flask, jsonify, request

app=Flask(__name__)
node_identifier = str(uuid4()).replace('-', '')
blockchain=BlockChain()

@app.route('/', methods=['GET'])
def index():
    return '欢迎光临k-block'
@app.route('/mine', methods=['GET'])
def mine():
     # 计算工作量证明
    last_block = blockchain.last_block
    last_proof = last_block['proof']
    proof = blockchain.proof_of_work(last_proof)
    # 给工作量证明的节点提供奖励.
    # 发送者为 "0" 表明是新挖出的币
    blockchain.new_transaction(
        sender="0",
        recipient=node_identifier,
        amount=1,
    )
    # 添加到链上
    block = blockchain.new_block(proof)
    response = {
        'message': "新区块",
        'index': block['index'],
        'transactions': block['transactions'],
        'proof': block['proof'],
        'previous_hash': block['previous_hash'],
    }
    return jsonify(response), 200
@app.route('/transactions/new', methods=['POST'])
def new_transaction():
    values = request.get_json()
    required = ['sender', 'recipient', 'amount']
    if not all(k in values for k in required):
        return 'Missing values', 400
    # 创建交易
    index = blockchain.new_transaction(values['sender'], values['recipient'], values['amount'])
    response = {'message': f'Transaction will be added to Block {index}'}
    return jsonify(response), 201
@app.route('/chain', methods=['GET'])
def full_chain():
    response = {
        'chain': blockchain.chain,
        'length': len(blockchain.chain),
    }
    return jsonify(response), 200

@app.route('/nodes/register', methods=['POST'])
def register_nodes():
    values = request.get_json()
    nodes = values.get('nodes')
    if nodes is None:
        return "Error: Please supply a valid list of nodes", 400
    for node in nodes:
        blockchain.register_node(node)
    response = {
        'message': 'New nodes have been added',
        'total_nodes': list(blockchain.nodes),
    }
    return jsonify(response), 201
@app.route('/nodes/resolve', methods=['GET'])
def consensus():
    replaced = blockchain.resolve_conflicts()
    if replaced:
        response = {
            'message': 'Our chain was replaced',
            'new_chain': blockchain.chain
        }
    else:
        response = {
            'message': 'Our chain is authoritative',
            'chain': blockchain.chain
        }
    return jsonify(response), 200
if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)