python BlockChain(二) 单链请求

安装postman

1.新建交易

http://127.0.0.1:5000//transanctions/new

{
    
          "sender":"liuping",
            "recipient":"lidan",
           "amount":500
}

image.png

2.挖矿

http://127.0.0.1:5000/mine

2.查看当前链

http://127.0.0.1:5000/chain

代码：

app = Flask(__name__)
blockchain = BlockChain()

node_identifier = str(uuid4()).replace("-","")

@app.route("/index", methods=['GET'])
def index():
    return "Hellp BlockChain"


@app.route('/transanctions/new', methods=['POST'])
def new_transaction():
    value = request.get_json()
    requested = ["sender", "recipient", "amount"]

    if value is None:
        return "Missing values", 400

    if not all(k in value for k in requested):
        return "Missing values", 400

    index = blockchain.new_transaction(value["sender"],
                                       value["recipient"],
                                       value["amount"])

    reponse = {"message": f'Transaction wille be add in {index}'}

    return jsonify(reponse), 201


@app.route('/mine', methods=['GET'])
def mine():

    last_block = blockchain.last_block
    last_proof = last_block["proof"]

    proof = blockchain.proof_work(last_proof)
    blockchain.new_transaction(sender="0",recipient=node_identifier,                      amount=1 )
    block = blockchain.new_block(proof,None)

    reponse = {
        'index': block["index"],
        'timestamp': block['timestamp'],
        'transcations': block['transcations'],
        'proof':  block['proof'],
        'previous_hash': block['previous_hash'],
    }
    return jsonify(reponse), 200


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


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