def test__block_genesis_block(self):
# given
bc = BlockChain()
# when
genesis_block = bc.last_block
# then
assert (genesis_block['previous_hash'] == 1)
assert (genesis_block['proof'] == 1)
assert (genesis_block['index'] == 1)
def do_get_json(self, arg):
'''
get "json_address"
read genesis transaction from json file
:param arg: string json_address
:return:
'''
json_address = arg.strip('"')
self.blockchain = BlockChain(BankSettings.objects.all()[0].difficulty)
with open(json_address, 'r') as json_file:
json_data = json.load(json_file)
if type(json_data).__name__ == 'list':
for item in json_data:
self._read_block_from_dict(item)
else: # it was a dict
self._read_block_from_dict(json_data)
def validator(**kwargs):
return True
class TestTransaction(Transaction):
@property
def default(self):
return TestTransaction(
sender="0",
recipient=str(uuid4()).replace('-', ''),
amount=1,
).value
model = Model(transation_type=type(TestTransaction), model_validator=validator)
block_chain = BlockChain(model)
'''
BlockChain server:
INPUT:
Mother_node (with port no)
Self_node (with port no)
Model
'''
app = Flask(__name__)
@app.route('/mine', methods=['GET'])
def mine():
last_block = block_chain.last_block
last_proof = last_block['proof']
from blockchain.blockchain import BlockChain
import blockchain_client
import blockchain_server
IP = None
PORT = None
CONNECTED_NODES = [] # list of addresses
BLOCKCHAIN = BlockChain()
BLOCK_INVITES = [] # list of {"block_id": block_id, "ip_address": ip_address}
TRANSACTION_INVITES = [
] # list of {"transaction_id": transaction_id, "ip_address": ip_address}
def initialise():
print("hi")
global IP, PORT, CONNECTED_NODES, BLOCKCHAIN, BLOCK_INVITES, TRANSACTION_INVITES
blockchain_client.IP = IP
blockchain_client.PORT = PORT
blockchain_client.CONNECTED_NODES = CONNECTED_NODES
blockchain_client.BLOCKCHAIN = BLOCKCHAIN
blockchain_client.BLOCK_INVITES = BLOCK_INVITES
blockchain_client.TRANSACTION_INVITES = TRANSACTION_INVITES
blockchain_server.IP = IP
blockchain_server.PORT = PORT
blockchain_server.CONNECTED_NODES = CONNECTED_NODES
blockchain_server.BLOCKCHAIN = BLOCKCHAIN
blockchain_server.BLOCK_INVITES = BLOCK_INVITES
blockchain_server.TRANSACTION_INVITES = TRANSACTION_INVITES
def setUp(self):
self.block_chain = BlockChain()
from blockchain.blockchain import BlockChain
blockchain = BlockChain()
# create the genesis block
previous_block = blockchain.create_genesis_block()
# How many blocks should we add to the chain after the genesis block
num_of_blocks_to_add = 20
for i in range(num_of_blocks_to_add):
next_block = blockchain.next_block(previous_block)
previous_block = next_block
# print the whole block chain
# blockchain.print_blockchain()
# don't change block in the blockchain, and print the validation result
bl = blockchain.validate_blockchain()
print(bl)
# change one block in the blockchain, and print the validation result
blockchain.set_block(4, 'Hey, I am block changed!')
bl = blockchain.validate_blockchain()
print(bl)
# !/usr/bin/env python
# -*- coding: utf-8 -*-
# @createTime: 2019-12-08 12:53
# @author: scdev030
from uuid import uuid4
from flask import Flask, jsonify, request
from blockchain.blockchain import BlockChain
from blockchain.proof_of_work import ProofOfWork
app = Flask(__name__)
node_id = str(uuid4())
block_chain = BlockChain()
proof_of_work = ProofOfWork()
@app.route('/mine', methods=['GET'])
def mine():
"""
创建新的区块,并添加到原本区块中
"""
# 生成下一个proof
last_block = block_chain.last_block
last_proof = last_block['proof']
proof = proof_of_work.proof(last_proof)
# sender为0表示此节点开采了新硬币
block_chain.new_transaction(sender="0", recipient=node_id, details='生成一个币')
# 添加新块