Controller.py

from Blockchain import BlockChain as bc

from uuid import uuid4

from flask import Flask,jsonify,request

# API
__author__ = "Bin Tan"
__date__ = "2017.11.6"


# 实例化
app = Flask(__name__)

# 为此节点生成唯一的地址
node_identifier = str(uuid4()).replace('-', '')

blockchain = bc()


@app.route('/chain', methods=['GET'])
def full_chain():
    response = {
        'chain': blockchain.chain,
        'length': len(blockchain.chain),
    }
    return jsonify(response), 200

@app.route('/transactions/new', methods=['POST'])
def new_transaction():
    values = request.get_json()

    # 检查所需的字段是否在POST的数据中
    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('/mine', methods=['GET'])
def mine():
    # 运行工作证明算法来获得下一个证明...
    last_block = blockchain.last_block
    last_proof = last_block['proof']
    proof = blockchain.proof_of_work(last_proof)

    # 给解开谜题的矿工发奖励，注意这是区块链产生数字货币的唯一方式
    blockchain.new_transaction(
        sender="0",
        recipient=node_identifier,
        amount=1,
    )

    # 将区块添加到链中
    block = blockchain.new_block(proof)

    response = {
        'message': "New Block Forged",
        'index': block['index'],
        'transactions': block['transactions'],
        'proof': block['proof'],
        'previous_hash': block['previous_hash'],
    }
    return jsonify(response), 200

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=5000)