def __init__(self, address):
self.address = address
key = RSA.generate(1024)
self.private_key = binascii.hexlify(
key.exportKey(format='DER')).decode('ascii')
self.public_key = binascii.hexlify(
key.publickey().exportKey(format='DER')).decode('ascii')
self.chain = BlockChain()
def handle_receive_blockchain(self, blockchain: dict):
other_blockchain = BlockChain.deserialize(blockchain)
if other_blockchain.length > self.blockchain.length:
self.blockchain.replace(other_blockchain)
self.transport.close()
def __init__(self, known_ports, state_map, config):
self.bot_instance = bot(config["port"], config, 0, 0)
self.port = config["port_socket"]
known_ports.discard(self.port)
self.other_ports = known_ports
self.chain = BlockChain(state_map)
self.vrep_port = config["port"]
pos = self.bot_instance.Get_postiton()
# print("this is pos in main bot: ", pos)
self.coordinates = {"x": pos[0], "y": pos[1]}
# print("coordinats::: ", self.coordinates)
# self.get_coordinates_from_vrep()
self.status = None # * "Picked" or "Placed" or "Dropped" or "Free"
self.block = None
def verify_blockchain_depth(cls) -> bool:
"""深入验证区块链（区块、交易）"""
if not cls.verify_blockchain():
return False
for block in BlockChain.get_instance().get_blocks()[1:]: # 第一个区块不作检查
if not cls.verify_block_depth(block):
return False
return True
def __init__(self, my_port, known_ports, data):
# ! DO THIS
self.coordinates = self.get_coordinates_from_vrep()
self.port = my_port
known_ports.discard(my_port)
self.other_ports = known_ports
self.chain = BlockChain(data)
# ! INSTEAD OF THIS
self.coordinates = {
"x": -0.024999968707561493,
"y": 0.04999999701976776
}
bot_coordinates = self.coordinates
self.status = None # * "Picked" or "Placed" or "Dropped" or "Free"
self.block = None
def is_ok(self) -> bool:
blc = BlockChain.get_instance()
for block in blc.get_blocks():
# 区块的时间戳肯定比区块链要后
if block.get_timestap() < blc.get_start_time():
return False
# 区块的时间戳肯定比现在前
if block.get_timestap() > time.localtime():
return False
return True
def verify_new_transaction(cls, trans: Transaction) -> bool:
"""验证一笔新交易"""
if not cls.verify_transaction(trans):
return False
# 验证输入的有效性
for inp in trans.get_inputs():
if not BlockChain.get_instance().verify_utxo(
inp.block, inp.trans, inp.output):
return False
return True
def is_ok(self) -> bool:
pre_hash = FIREST_BLOCK_PREHASH
for i, block in enumerate(BlockChain.get_instance().get_blocks()):
# 索引值index应合法
if block.get_index() != i + 1:
return False
# pre_hash值应为上一个区块
if pre_hash != block.get_prehash():
return False
pre_hash = block.get_hash()
return True
def is_ok(self) -> bool:
address_list = [key.get_address() for key in self.trans.get_pub_keys()]
# 签名必须有效
if not self.trans.verify_transaction():
return False
# 每一个输入都为本人的utxo
for inp in self.trans.get_inputs():
outp = BlockChain.get_instance().input_to_output(inp)
if outp.address not in address_list:
return False
return True
class Node(object):
def __init__(self, address):
self.address = address
key = RSA.generate(1024)
self.private_key = binascii.hexlify(
key.exportKey(format='DER')).decode('ascii')
self.public_key = binascii.hexlify(
key.publickey().exportKey(format='DER')).decode('ascii')
self.chain = BlockChain()
def __repr__(self):
return 'node: {} len: {}'.format(self.address, len(self.chain))
def make_transaction(self, to, amount):
trans = {
'sender': self.address,
'to': to.address,
'amount': str(amount)
}
return Transaction(**trans, signature=self.sign(trans))
def sign(self, transaction):
private_key = RSA.importKey(binascii.unhexlify(self.private_key))
signer = PKCS1_v1_5.new(private_key)
h = SHA.new(str(transaction).encode('utf8'))
return binascii.hexlify(signer.sign(h)).decode('ascii')
def verify(self, transaction):
public_key = RSA.importKey(binascii.unhexlify(transaction.sender))
verifier = PKCS1_v1_5.new(public_key)
h = SHA.new(str(transaction).encode('utf8'))
return verifier.verify(h, binascii.unhexlify(transaction.signature))
def add_next_block(self, transactions, proof):
self.chain.next_block(transactions, proof)
def verify_new_block(cls, block: Block) -> bool:
"""验证一个新块"""
if not cls.verify_block_depth(block):
return False
# pre_hash的值要正确
if block.get_prehash() != BlockChain.get_instance().get_top_block(
).get_hash():
return False
# 验证每笔交易的有效性
inputs = []
for trans in block.get_user_transactions():
if not cls.verify_new_transaction(trans):
return False
inputs.extend(trans.get_inputs())
# 不同的交易不能有相同的输入
if len(set(inputs)) != len(inputs):
return False
return True
def verify_block_depth(cls, block: Block) -> bool:
"""深入验证区块（包括区块中的交易）"""
if not cls.verify_block(block):
return False
# 验证用户的交易
for trans in block.get_user_transactions():
if not cls.verify_transaction(trans):
return False
# 验证第一笔交易
trans = block.get_head_transaction()
# 计算交易费
fee = BlockChain.get_instance().compute_block_fee(block)
# 计算矿工奖励
mini_fee = trans.compute_outputs_btcs() - fee
# 计算这个区块时的矿工奖励
mini_btcs = block.get_now_ming_btcs()
# 验证矿工奖励合法性
if mini_fee != mini_btcs:
return False
return True
class Bot:
def __init__(self, known_ports, state_map, config):
self.bot_instance = bot(config["port"], config, 0, 0)
self.port = config["port_socket"]
known_ports.discard(self.port)
self.other_ports = known_ports
self.chain = BlockChain(state_map)
self.vrep_port = config["port"]
pos = self.bot_instance.Get_postiton()
# print("this is pos in main bot: ", pos)
self.coordinates = {"x": pos[0], "y": pos[1]}
# print("coordinats::: ", self.coordinates)
# self.get_coordinates_from_vrep()
self.status = None # * "Picked" or "Placed" or "Dropped" or "Free"
self.block = None
# TODO INTEGRATION:
def get_coordinates_from_vrep(self):
self.coordinates = self.bot_instance.coordinates
# print("these are the bots coord", self.coordinates)
# return coordinates
# * computes euclideian distance between two points
def euclidean_dist(self, c1, c2):
# print("this is c1: ", c1)
# print("this is c2: ", c2)
delta_x = c1["x"] - c2["x"]
delta_y = c1["y"] - c2["y"]
# delta_x = 5
# delta_y = 10
return (delta_x**2 + delta_y**2)**(0.5)
def spit_weighted_number(self, length):
if length == 0:
return 0
random_array = []
for i in range(1, length + 1):
random_array.append([i] * (length + 1 - i))
flattened = [item for sublist in random_array for item in sublist]
return random.choice(flattened)
def force_update(self):
pass
def sort_coords(self, c1):
# print("this is bot coords:", self.coordinates)
# print("this is c1", c1)
c1 = {"x": c1["current"]["x"], "y": c1["current"]["y"]}
dist1 = self.euclidean_dist(c1, self.coordinates)
# dist2 = euclidean_dist(c2, bot_coordinates)
# if dist1 < dist2:
# return -1
# elif dist1 > dist2:
# return 1
# else:
# return 0
return dist1
# * query the blockchain and obtains the state_map (topmost block) as data
def queryBlockChain(self):
response = self.chain[len(self.chain.blocks) - 1]
# print("this is response::::", response.data)
return response
def prepare_to_send(self):
latest_block = self.chain.get_block()
json_string = json.dumps(latest_block.data)
return json_string
async def send_block(self):
print("sending block to all other ports: ")
block_json = self.prepare_to_send()
for port in self.other_ports:
async with websockets.connect(host + str(port)) as websocket:
await websocket.send("block " + block_json)
print("data sent to port number: ", port)
def start_server_loop_in_thread(self):
new_loop = asyncio.new_event_loop()
asyncio.set_event_loop(new_loop)
start_server = websockets.serve(self.bot_server, "localhost",
self.port)
new_loop.run_until_complete(start_server)
new_loop.run_forever()
# * Gets the blockchain and updates it
def update_blockchain(self, state):
# print("update blockchain called")
latest_block = self.queryBlockChain()
latest_copy = latest_block
# print("this is latest_copy", latest_copy)
# print("its type??: ", type(latest_copy))
# print("its data:: ", latest_copy.data)
block_data = latest_copy.data["block_data"]
block = block_data[self.block["id"]]
print(
"!!!!!!!!!!!!!!----------BLOCKCHAIN UPDATED-------------!!!!!!!!!!!!!!!!!!!!"
)
data_str = json.dumps(block_data)
data_dict = {"data": data_str}
G.add_node(data_dict)
print(data_dict["data"])
block["status"] = state
# block["current"]["x"] = self.coordinates["x"]
# block["current"]["y"] = self.coordinates["y"]
block_data[self.block["id"]] = block
latest_copy.data["block_data"] = block_data
self.chain.add_block(latest_copy.data)
new_loop = asyncio.new_event_loop()
new_loop.run_until_complete(self.send_block())
G.layout()
G.draw('blockchain_plot.png')
# * Returns the kth closest block to the bot
# * Return data:
# * {
# * "current":
# * {
# * "x":..
# * "y":..
# * },
# * "final":
# * {
# * "x"...,
# * "y"...
# * },
# * "id"..
# * }
# * if all blocks are picked or placed, it returns None
def get_kth_closest_block(self, k=1):
latest_block = self.queryBlockChain()
block_array = []
# self.coordinates = self.get_coordinates_from_vrep()
for block_id in latest_block.data["block_data"].keys():
block = latest_block.data["block_data"][block_id]
if (block["status"] != states["PLACED"]
and block["status"] != states["PICKED"]):
block_array.append({
"current": {
"x": block["current"]["x"],
"y": block["current"]["y"],
},
"final": {
"x": block["final"]["x"],
"y": block["final"]["y"]
},
"id": block_id,
})
if len(block_array) == 0:
return None
block_array = sorted(block_array, key=self.sort_coords)
if k <= len(block_array):
return block_array[k - 1]
else:
return block_array[len(block_array) - 1]
# * chooses a block and tries to pick it
def choose_block(self):
length = 0
latest_block = self.queryBlockChain()
# print(latest_block)
for bl in latest_block.data["block_data"]:
block = latest_block.data["block_data"][bl]
# print(block)
if (block["status"] == states["IDLE"]
or block["status"] == states["DROPPED"]):
length += 1
k = self.spit_weighted_number(length)
print("chosen k:: ", k)
if k == 0:
return None
block = self.get_kth_closest_block(k)
return block
# * pick_block if threshold error is less than given threshold
def state_block_check(self, state=states["MOVING"], threshold=0.1):
if state == states["MOVING"]:
block_coords = self.block["current"]
elif state == states["PICKED"]:
block_coords = self.block.final
if euclidean_dist(self.coordinates, block_coords) <= threshold:
return True
return False
def pick_block(self):
self.bot_instance.pick()
if self.bot_instance.objectPicked != 0:
self.update_blockchain(states["PICKED"])
return True
return False
def goto_destination(self):
pass
async def bot_server(self, websocket, path):
print("server running at port: ", self.port)
message = await websocket.recv()
print("MESSAGE RECEIVED")
if message[0:6] == "block ":
print("receiving block")
message = message[6:]
block = json.loads(message)
self.chain.add_block(block)
elif message[0:6] == "chain?":
chain_string = json.dumps(self.chain)
await websocket.send(chain_string)
def is_block_pickable(self):
latest_block = self.queryBlockChain()
block = latest_block.data["block_data"][self.block["id"]]
if block["status"] == states["DROPPED"] or block["status"] == states[
"IDLE"]:
return True
return False
def place_block(self):
self.update_blockchain(states["PLACED"])
self.bot_instance.place()
# self.coordinates = self.get_coordinates_from_vrep()
# self.status = states["LOOKING"]
# block_coords = latest_block["block_data"][block_id].final
def follow_path(self, block, final=False):
if final:
x = block["final"]["x"]
y = block["final"]["y"]
else:
x = block["current"]["x"]
y = block["current"]["y"]
# print(block)
# print(x,y)
self.bot_instance.Follow_path([x, y, 0.05])
def chooseTargetBlock(self, chosenLabel, labels):
pass
# choose closest block from chosen cluster
def infinite_loop(self):
# r=print("inside infinite loop")
self.state = states["BEGIN"]
while self.state != states["END"]:
self.block = self.choose_block()
if self.block == None:
print("No block to pick")
self.state = states["END"]
break
else:
print("chosen block id: ", self.block["id"])
self.state = states["MOVING"]
self.follow_path(self.block)
if self.is_block_pickable():
# print("before time sleep")
time.sleep(2)
# print("after time sleep")
status = self.pick_block()
print(status)
if status:
self.state = states["PICKED"]
self.follow_path(self.block, True)
self.place_block()
self.state = states["PLACED"]
self.states = states["BEGIN"]
continue
async def force_update(self):
chain_array = []
for port in self.other_ports:
async with websockets.connect(host + str(port)) as websocket:
await websocket.send("chain?")
response = await websocket.recv()
chain = json.loads(response)
chain_array.append(chain)
for chain in chain_array:
if len(chain) > len(self.chain):
self.chain = chain
def main_driver(self):
# inter = setInterval(3, self.get_coordinates_from_vrep)
t1 = threading.Thread(target=self.infinite_loop, args=[])
t1.start()
t3 = threading.Thread(target=self.start_server_loop_in_thread)
t3.start()
# foce_push_interval = setInterval(60, self.force_update)
# TODO: FORCE PUSH
t1.join()
t3.join()
def test_blockchain(self):
bc = BlockChain()
blocks_to_mine = 5
for i in range(blocks_to_mine):
bc.mine("data")
self.assertSerializable(BlockChain, bc, globals())
self.assertTrue(bc.validate_blocks(0, 1))
self.assertTrue(bc.validate_blocks(1, 3))
self.assertTrue(bc.is_valid_chain())
self.assertFalse(bc.replace(bc))
self.assertEqual(bc.blocks, bc.blocks)
self.assertIs(bc[0], bc.blocks[0])
self.assertEqual(len(bc), blocks_to_mine + 1)
self.assertEqual(bc[0:-1:2], bc.blocks[0:-1:2])
self.assertEqual(bc[::-1], bc.blocks[::-1])
last_block = bc[-1]
bc1 = BlockChain()
bc1.mine("any")
self.assertFalse(bc1.add_block(last_block))
self.assertNotEqual(bc, bc1)
self.assertFalse(bc.replace(bc1))
self.assertEqual(bc[-1], last_block)
self.assertTrue(bc1.replace(bc))
self.assertEqual(bc1, bc)
print()
for i in range(blocks_to_mine):
bc1.mine("another data")
self.assertIs(bc1.blocks, bc.blocks)
self.assertEqual(bc, bc1)
import asyncio
import websockets
import jsonpickle
import requests
from chain import BlockChain
from block import Block
import time
from sklearn.cluster import DBSCAN
import sys
import numpy as np
chain = BlockChain()
thisbot.id = "Bot1"
"""
The static parameters
bot_id
"""
class Bot:
def __init__(self, coordinates, bot_id):
self.coordinates = [coordinates.x, coordinates.y]
self.id = bot_id
def chooseTargetCluster(self, cluster_center, labels):
dist = sys.maxint
chosenLabel = sys.maxint
for point in cluster_center:
curr_dist = euclidean_dist(self.coordinates, point[1])
class Bot:
def __init__(self, my_port, known_ports, data):
# ! DO THIS
self.coordinates = self.get_coordinates_from_vrep()
self.port = my_port
known_ports.discard(my_port)
self.other_ports = known_ports
self.chain = BlockChain(data)
# ! INSTEAD OF THIS
self.coordinates = {
"x": -0.024999968707561493,
"y": 0.04999999701976776
}
bot_coordinates = self.coordinates
self.status = None # * "Picked" or "Placed" or "Dropped" or "Free"
self.block = None
# TODO INTEGRATION:
def get_coordinates_from_vrep(self):
# <<<<<<< dev_blockchain
#*port is the port which the vrep simulation is running
# scene = scene(port)
# map = scene.scenesinit(port)
map = []
#*process map here according to req and return
return map
# =======
global bot_coordinates
self.coordinates = {
"x": -0.024999968707561493,
"y": 0.04999999701976776
}
bot_coordinates = self.coordinates
pass
# >>>>>>> master
# * query the blockchain and obtains the map as json data
def force_update():
pass
def queryBlockChain(self):
response = self.chain.get_block()
# JSONresponse = jsonpickle.decode(response)
# plotBots(JSONresponse)
# plotBlocks(JSONresponse)
return response
# * Comparator -> Sorts coordinatse based on least distance from bots cordinates
def prepare_to_send(self):
latset_block = self.chain.get_block()
json_string = json.dumps(latset_block)
return json_string
async def send_block(self):
global host
block_json = self.prepare_to_send()
for port in self.other_ports:
async with websockets.connect(host + str(port)) as websocket:
await websocket.send("block " + block_json)
# * Gets the blockchain and updates it
def update_blockchain(self, state):
latest_block = self.queryBlockChain()
block_data = latest_block.data["block_data"]
block = block_data[self.block["id"]]
block["state"] = state
block["current"]["x"] = self.coordinates["x"]
block["current"]["y"] = self.coordinates["y"]
block_data[self.block["id"]] = block
self.chain.add_block(block_data)
asyncio.get_event_loop().run_until_complete(self.send_block())
# * Returns the kth closest block to the bot
# * Return data:
# * {
# * "current":
# * {
# * "x":..
# * "y":..
# * },
# * "final":
# * {
# * "x"...,
# * "y"...
# * },
# * "id"..
# * }
# * if all blocks are picked or placed, it returns None
def get_kth_closest_block(self, k=1):
latest_block = self.queryBlockChain()
block_array = []
for block_id in latest_block.data["block_data"].keys():
block = latest_block.data["block_data"][block_id]
if (block["status"] != states["PLACED"]
and block["status"] != states["PICKED"]):
block_array.append({
"current": {
"x": block["current"]["x"],
"y": block["current"]["y"],
},
"final": {
"x": block["final"]["x"],
"y": block["final"]["y"]
},
"id": block_id,
})
if len(block_array) == 0:
return None
block_array = sorted(block_array, key=sort_coords)
if k <= len(block_array):
return block_array[k - 1]
else:
return block_array[len(block_array) - 1]
# * chooses a block and tries to pick it
def choose_block(self):
length = 0
latest_block = self.queryBlockChain()
print(latest_block)
for bl in latest_block.data["block_data"]:
block = latest_block.data["block_data"][bl]
print(block)
if (block["status"] == states["IDLE"]
or block["status"] == states["DROPPED"]):
length += 1
k = spit_weighted_number(length)
block = self.get_kth_closest_block(k)
return block
# * pick_block if threshold error is less than given threshold
def state_block_check(self, state=states["MOVING"], threshold=0.1):
if state == states["MOVING"]:
block_coords = self.block["current"]
elif state == states["PICKED"]:
block_coords = self.block.final
if euclidean_dist(self.coordinates, block_coords) <= threshold:
return True
return False
def pick_block(self):
# self.status = states["PICKED"]
self.update_blockchain(states["PICKED"])
def goto_destination(self):
pass
async def bot_server(self, websocket, path):
while True:
message = await websocket.recv()
if message[0:6] == "block ":
message = message[6:]
block = json.loads(message)
self.chain.add_block(block)
elif message[0:6] == "chain?":
chain_string = json.dumps(self.chain)
await websocket.send(chain_string)
def is_block_pickable(self):
latest_block = self.queryBlockChain()
block = latest_block.data["block_data"][self.block["id"]]
if block["status"] == states["DROPPED"] or block["status"] == states[
"IDLE"]:
return True
return False
def place_block(self):
self.update_blockchain(states["PLACED"])
# self.status = states["LOOKING"]
# block_coords = latest_block["block_data"][block_id].final
def chooseTargetBlock(self, chosenLabel, labels):
pass
# choose closest block from chosen cluster
def infinite_loop(self):
self.state = states["BEGIN"]
while self.state != states["END"]:
self.block = self.choose_block()
if self.block == None:
self.state = states["END"]
break
else:
self.state = states["MOVING"]
while not self.state_block_check(states["MOVING"], 0.5):
pass
if self.is_block_pickable():
self.state = states["PICKED"]
self.pick_block()
while not self.state_block_check(states["PICKED"], 0.5):
pass
self.state = states["PLACED"]
self.place_block()
self.state = states["BEGIN"]
continue
else:
self.state = states["BEGIN"]
continue
async def force_update(self):
chain_array = []
for port in self.other_ports:
async with websockets.connect(host + str(port)) as websocket:
await websocket.send("chain?")
response = await websocket.recv()
chain = json.loads(response)
chain_array.append(chain)
for chain in chain_array:
if len(chain) >= len(self.chain):
self.chain = chain
def main_driver(self):
inter = setInterval(1, self.get_coordinates_from_vrep())
start_server = websockets.serve(self.bot_server, "localhost",
self.port)
t1 = threading.Thread(target=self.infinite_loop, args=[])
t1.start()
foce_push_interval = setInterval(60, self.force_update)
loop = asyncio.get_event_loop()
loop.run_until_complete(start_server)
loop.run_forever()
def is_ok(self) -> bool:
# 交易费必须大于0
blc = BlockChain.get_instance()
return blc.compute_transaction_fee(self.trans) > Btc("0")
def send_blockchain(cls, blockchain: BlockChain) -> dict:
return dict(type=cls.RECEIVE_BLOCKCHAIN.value,
blockchain=blockchain.serialize())
#!/usr/bin/python3
from chain import BlockChain
from wallet import Wallet
from transactions import Transaction
bch = BlockChain()
w1 = Wallet("Abdou")
w2 = Wallet("Aymen")
tr = Transaction(w1, w2, "50000")
late = bch.latest_block
bch.construct_block(late.proof_nonce, late.prev_hash, tr.to_dict(), {
w1.user_id: "00",
w2.user_id: "00"
})
tr1 = Transaction(w2, w1, "50000")
late = bch.latest_block
bch.construct_block(late.proof_nonce, late.prev_hash, tr1.to_dict(), {
w1.user_id: "00",
w2.user_id: "00"
})
w3 = Wallet("Ons")
bch.construct_block(late.proof_nonce, late.prev_hash, [], {
w1.user_id: "00",
w2.user_id: "00",
w3.user_id: "00"
})
print(bch.chain)
def __blc(self) -> BlockChain:
return BlockChain.get_instance()
def read_blockchain(self) -> None:
# read from local or init
self.blockchain = BlockChain()
#!/usr/bin/python3
from block import Block
from chain import BlockChain
from wallet import Wallet
my_wallet = Wallet("aymen")
blockchain = BlockChain()
print("Blockchain Records Status :")
print(blockchain.chain)
last_block = blockchain.latest_block
last_proof_nonce = last_block.proof_nonce
proof_nonce = blockchain.proof_of_work(last_proof_nonce)
print("***Mining CyberCellCoin about to start***")
blockchain.add_transaction(
sender="Ons_Jannet", #it implies that this node has created a new block
recipient="Aymen_Haddaji", #let's send Aymen some coins!
amount=10, #creating a new block (or identifying the proof number) is awarded with 10
)
last_hash = last_block.calculate_hash
block = blockchain.construct_block(proof_nonce, last_hash)
print(blockchain.chain)
print("***Transaction seccessfully executed***")
print("===============================================")
print("let's execute another transaction !")
print("===============================================")
def __import_blc_from_db(self) -> None:
"""从sqlite数据库导入区块链"""
for block in self.sqlite_driver.get_blocks():
BlockChain.get_instance().add_block(block)
# import jsonpickle
import requests
from chain import BlockChain
from block import Block
import time
from sklearn.cluster import DBSCAN
import sys
import numpy as np
import random
# from pyhton import intial
#*not so sure about the import statement
data = []
chain = BlockChain(data)
import json
from setInterval import setInterval
import threading
import websockets
import enum
"""
The static parameters
bot_id
"""
host = "ws://localhost:"
states = {
"IDLE": "idle",
"PLACED": "placed",
"PICKED": "picked",
def set_blockchain(self, blc: BlockChain) -> None:
"""设定区块链数据库"""
BlockChain.set_instance(blc)
def main():
manufacturer = {
'transactions': [{
'timestamp': datetime.now().timestamp(),
'product_id': 1,
'product_serial': 500,
'name': 'cotton pants',
'from': 'Manufacturer X',
'to': 'Transportation X',
'message': 'good condition',
'digital signature': 'approved',
'flagged': 'N'
}, {
'timestamp': datetime.now().timestamp(),
'product_id': 2,
'product_serial': 501,
'name': 'cotton shirt',
'from': 'Manufacturer X',
'to': 'Transportation X',
'message': 'good condition',
'digital signature': 'approved',
'flagged': 'N'
}, {
'timestamp': datetime.now().timestamp(),
'product_id': 2,
'product_serial': 502,
'name': 'cotton shirt',
'from': 'Manufacturer X',
'to': 'Transportation X',
'message': 'good condition',
'digital signature': 'approved',
'flagged': 'N'
}]
}
transportation = {
'transactions': [{
'timestamp': datetime.now().timestamp(),
'product_id': 1,
'product_serial': 500,
'name': 'cotton pants',
'from': 'Transportation X',
'to': 'Vendor X',
'shipping_id': 100,
'message': 'good condition',
'digital signature': 'approved',
'flagged': 'N'
}, {
'timestamp': datetime.now().timestamp(),
'product_id': 2,
'product_serial': 501,
'name': 'cotton shirt',
'from': 'Transportation X',
'to': 'Vendor X',
'shipping_id': 101,
'message': 'good condition',
'digital signature': 'approved',
'flagged': 'N'
}, {
'timestamp': datetime.now().timestamp(),
'product_id': 2,
'product_serial': 502,
'name': 'cotton shirt',
'from': 'Transportation X',
'to': 'Vendor X',
'shipping_id': 102,
'message': 'poor condition',
'digital signature': 'retailer review',
'flagged': 'Y'
}]
}
vendor = {
'transactions': [{
'timestamp': datetime.now().timestamp(),
'product_id': 1,
'product_serial': 500,
'name': 'cotton pants',
'from': 'Vendor X',
'to': 'Shelf X',
'receiving_id': 300,
'message': 'good condition',
'digital signature': 'approved',
'flagged': 'N'
}, {
'timestamp': datetime.now().timestamp(),
'product_id': 2,
'product_serial': 501,
'name': 'cotton shirt',
'from': 'Vendor X',
'to': 'Shelf X',
'receiving_id': 301,
'message': 'good condition',
'digital signature': 'approved',
'flagged': 'N'
}, {
'timestamp': datetime.now().timestamp(),
'product_id': 2,
'product_serial': 502,
'name': 'cotton shirt',
'from': 'Vendor X',
'to': 'RTM',
'receiving_id': 302,
'message': 'Box Damaged',
'digital signature': 'rejected',
'flagged': 'Y'
}]
}
B = BlockChain()
a = B.add(manufacturer)
b = B.add(transportation)
c = B.add(vendor)
B.getTransactions('all')
print(B.getLastBlock())
from key import UserKey
from chain import Btc, TransOutput, TransInput, Transaction, Block, BlockChain
from config import MINING_BTCS
from verify import Verify
if __name__ == "__main__":
print(BlockChain.__qualname__, BlockChain.get_instance.__qualname__)
# 创建区块链
bc = BlockChain.get_instance()
print(bc.get_start_time())
# 初始的两个用户
key1 = UserKey()
key2 = UserKey()
# 初始区块的创币交易（只有输出，没有输入）
t1 = Transaction()
t1.add_output(TransOutput(Btc("5000"), key1.get_address()))
t1.add_output(TransOutput(Btc("5000"), key2.get_address()))
# 创世区块
b1 = Block()
b1.add_transaction(t1)
# 添加矿工奖励交易
mt1 = Transaction()
mt1.add_output(TransOutput(Btc(MINING_BTCS), key1.get_address()))
b1.set_head_transaction(mt1)
b1.set_index(1)
# 挖矿
b1.find_randnum()
# 添加区块
bc.add_block(b1)
# key1向key2转账
t2 = Transaction()
#!/usr/bin/python3
from wallet import Wallet
from chain import BlockChain
from block import Block
#sign transaction
my_wallet = Wallet("A")
b = BlockChain()
my_wallet.create_keys()
my_wallet.save_keys()
my_wallet.load_keys()
pub = my_wallet.public_key
prv = my_wallet.private_key
verf = my_wallet.verify_transaction(b.add_transaction().data[TRANSACTION])
signer = my_wallet.sign_transaction(sender="Ons_Jannet",
recipient="Aymen_Haddaji",
amount=10)
print(" signature user is:", signer, verf)