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client.py
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client.py
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import logging
import os
import re
import sys
import time
from threading import Thread
from time import sleep
import click
import requests
import json
from node import Node
from wallet import Wallet
import jsonpickle
from blockchain import Blockchain
from rest import app
import global_variable
# !!! this is a comment intended for master branch ONLY !!!!
@click.command()
@click.option('-p', '--port', default=22147, help='port to run the client on')
@click.option('-b', '--bootstrap', is_flag=True, help='for bootstrap node only')
@click.option('-a', '--auto', is_flag=True, default=False,
help='Everyone starts send coins automatically, after takes the initial coins')
def main(port, bootstrap, auto):
# signal.signal(signal.SIGINT, sigint_handler())
if bootstrap:
# print("This is bootstrap node")
wallet = Wallet()
global_variable.node = Node(0, wallet)
# Add bootstrap node in the peers' list
ip_address = global_variable.bootstrapIp
public_key_str = wallet.public_key
# Create tuple of register data
node_register_data = (public_key_str, ip_address)
# Append it in nodes peers' list
global_variable.node.peers.append(node_register_data)
# edw an theloume kanoume wait mexri olo oi clients na graftoun
# giati to diktuo den exei arxikopoihthei akoma, ara de mporoume na kanoume
# transactions
else:
# print("This is user node")
if register_with_bootstrap(port) is False:
print("Problem establishing connecion -- exit")
exit()
# edw perimenoume anagastika na mas apantisei o bootstrap
# to register request
# ksekinaei se thread to loop pou diavazei input kai kalei
# tis antistoixes sinartiseis tou node gia na parei
# to balance, teleutaia transactions
thr_client = Thread(target=client_input_loop)
thr_client.start()
thr_auto = Thread(target=send_coins_auto_after_initial_coins, args=[auto])
thr_auto.start()
logging.getLogger('werkzeug').disabled = True
os.environ['WERKZEUG_RUN_MAIN'] = 'true'
app.run(host='0.0.0.0', port=port)
thr_auto.join()
thr_client.join()
# exit()
def send_coins_auto_after_initial_coins(auto):
# If chain has the genesis block wait 10sec and start auto paying
node = global_variable.node
# If auto is disable return
if auto is False:
return
else:
# Otherwise wait till the genesis block is sent and first of all, all users have been register!
while len(node.blockchain.chain) < 1 and len(node.peers) == global_variable.numOfClients:
sleep(1)
print("In 20 sec automatic payments will start, run without -a flag to disable this.")
# Wait for another 10sec, so the system be stabilized
sleep(20)
print("Auto payments have just started.")
# Call the function which reads the transactions from a default file, and keep logs for verify
test_case_1()
def sigint_handler(sig, frame):
print('You pressed Ctrl+C!')
sys.exit(0)
def client_input_loop(): # maybe: ,node
with app.app_context():
# global node
node = global_variable.node
# node.print_balance()
# node.wallet.balance(node.blockchain)
# node = global_variable.node
sleep(0.5)
print("Client started...")
while True:
# str = input(f"[node{node.current_id_count}]>>")
str_in = input("[node" + str(node.current_id_count) + "]>>")
if str_in in {'balance', 'b'}:
print("Balance: ", node.wallet.balance(node.blockchain))
elif str_in.startswith('init'):
init_nodes_coins()
elif str_in.startswith('bl'):
# print(node.blockchain)
node.blockchain.print_transactions()
elif str_in in {'view', 'v'}:
print_view()
elif str_in in {'view_d', 'vv'}:
print_view_details()
elif str_in in {'help', 'h'}:
print_help()
elif str_in == 'test':
test_case_1()
elif str_in == 'test_v':
test_case_1_verify()
elif str_in.startswith('utxos'):
node.blockchain.print_utxos()
elif str_in.startswith('cutxos'):
node.blockchain.print_utxos(1)
elif str_in.startswith('tff'):
transactions_from_default_file(node)
elif str_in.startswith('tffs'):
transactions_from_default_file_time_delay(node)
# transactions_from_file(str, node)
elif str_in.startswith('results'):
write_results_to_file()
elif str_in.startswith('t'):
client_transaction(str_in, node)
elif str_in.startswith('un'):
print_unconfirmed()
elif str_in.startswith('id'):
print_my_id()
elif str_in in {'q', 'quit', 'e', 'exit'}:
print("Exiting...")
# exit()
return
elif str_in in {'\n', ''}:
continue
else:
print_invalid_command()
def print_my_id():
node = global_variable.node
peers = node.peers
wallet = node.wallet
node_id = [idx for idx, x in enumerate(peers) if x[0] == wallet.public_key][0]
print("Client's id is: " + str(node_id))
def print_view():
node = global_variable.node
print("\t\t\tAll transactions")
for idx, transaction in enumerate(node.blockchain.get_transactions()):
print(str(idx) + ": " + transaction.transaction_id)
print("\n")
def print_view_details():
node = global_variable.node
print("\t\t\tAll transactions in datails")
for transaction in node.blockchain.get_transactions():
print(transaction)
print("\n")
def print_unconfirmed():
node = global_variable.node
print("\t\tAll unconfirmed transactions")
for idx, transaction in enumerate(global_variable.node.blockchain.unconfirmed_transactions):
print(str(idx) + ": " + transaction.transaction_id)
def write_results_to_file():
node = global_variable.node
chain_len = len(node.blockchain.chain)
# Take the first block after the initial coins blocks
idx = int((len(node.peers) - 1) / node.blockchain.capacity) + 1 # plus one because there is the genesis block
first_block = node.blockchain.chain[idx]
# From these block take the first transaction's timestamp
first_transaction = first_block.transactions[0]
first_transaction_timestamp = first_transaction.timestamp
last_block = node.blockchain.last_block()
last_block_timestamp = last_block.timestamp
capacity = node.blockchain.capacity
difficulty = node.blockchain.difficulty
peers_len = len(node.peers)
filename = "nodes_" + str(peers_len) + "_capacity_" + str(capacity) + "_difficulty_" + str(difficulty) + ".json"
current_dir = os.getcwd()
path_file = current_dir + "/result/" + filename
if os.path.exists(path_file):
os.remove(path_file)
with open(path_file, 'w') as file:
json.dump({"capacity": capacity,
"difficulty": difficulty,
"first_transaction_timestamp": first_transaction_timestamp,
"last_block_timestamp": last_block_timestamp,
"chain_len": chain_len}, file)
def init_nodes_coins():
# Take the reference to global variance node
node = global_variable.node
# Send initial money to all other users
for idx, peer in enumerate(node.peers):
if not (global_variable.node.wallet.public_key == peer[0]):
str_in = "t " + str(idx) + " 100"
client_transaction(str_in, node)
def transactions_from_default_file(node):
file_path = str(global_variable.numOfClients) + "nodes/transactions" + str(node.current_id_count) + ".txt"
f = open(file_path, "r")
for line in f:
client_transaction("tff " + line, node)
time.sleep(1)
def transactions_from_default_file_time_delay(node):
file_path = str(global_variable.numOfClients) + "nodes/transactions" + str(node.current_id_count) + ".txt"
f = open(file_path, "r")
for line in f:
client_transaction("tff " + line, node)
time.sleep(3)
def transactions_from_file(str_in, node):
args = str_in.split(' ')
if len(args) != 2:
print('usage: tff <filename>')
else:
f = open(args[1], "r")
for line in f:
client_transaction("tff " + line, node)
# This function is called so node to be registered and synced with bootstrap node
def register_with_bootstrap(my_port):
"""
Internally calls the `register_node` endpoint to
register current node with the node specified in the
request, and sync the blockchain as well as peer data.
"""
# Use the global variables
# global node
wallet = Wallet()
# host_name = socket.gethostname()
# host_name = socket.getfqdn()
# ip = socket.gethostbyname(host_name)
# my_url = "http://" + ip + ":" + str(my_port)
#
# print("my url for register is: " + my_url)
# Init request's parameters
public_key_json = jsonpickle.encode(wallet.public_key)
data = {"public_key": public_key_json,
"node_port": str(my_port)}
headers = {'Content-Type': "application/json"}
url = "{}/register_node".format(global_variable.bootstrapIp)
# Make a request to register with remote node and obtain information
response = requests.post(url, data=json.dumps(data), headers=headers)
if response.status_code == 200:
# Decode json attributes
chain_list = jsonpickle.decode(response.json()['chain'])
peers = jsonpickle.decode(response.json()['peers'])
# Search index of node's ip address
node_id = [idx for idx, x in enumerate(peers) if x[0] == wallet.public_key][0]
global_variable.peers_ids = {peers[i][0]: i for i, x in enumerate(peers)}
try:
global_variable.node = Node(node_id, wallet)
node = global_variable.node
node.blockchain = Blockchain.create_chain_from_list(chain_list)
node.peers = peers
except Exception as e:
# if chain is tempered, then return False
print(str(e))
return False
# Return True if blockchain is created
return True
else:
# if something goes wrong, return wrong
return False
# Sunarthsh gia na kanei o client transaction
# mporei na xrisimopoihsei tin sunartisi tou node
def client_transaction(str_in, node):
args = str_in.split(" ")
if len(args) != 3:
print("Invalid transaction form. Should have exactly 2 arguments")
print_transaction_help()
return
if not valid_pkey(args[1]):
print("Invalid public key for transaction")
print_transaction_help()
return
elif not valid_ammount(args[2]):
print("Invalid amount of coins for transaction")
print_transaction_help()
return
recipient_ids = [int(i) for i in args[1] if i.isdigit()]
if len(recipient_ids) != 1:
print("Found more than num in", recipient_ids)
recipient_id = recipient_ids[0]
if recipient_id > len(node.peers) - 1:
print("Error: No node with this id: " + str(recipient_id))
return
amount = args[2]
recipient_pubkey = node.peers[recipient_id][0]
node.wallet.sendCoinsTo(recipient_pubkey, int(amount), node.blockchain, node.peers)
# edw gia kathe peer IP kanme broadcast sto /new_transaction
def test_case_1():
node = global_variable.node
my_id = node.current_id_count
infile = str(global_variable.numOfClients) + "nodes/transactions" + str(my_id) + ".txt"
inf = open(infile)
total_c = 0
for line in inf:
words = line.split(" ")
recipient_id = int(re.sub("[^0-9]", "", words[0]))
amount = int(words[1])
recipient_pubkey = node.peers[recipient_id][0]
node.wallet.sendCoinsTo(recipient_pubkey, int(amount), node.blockchain, node.peers)
time.sleep(2)
node.sent_transactions_test[(recipient_id, amount)] = False
total_c += 1
inf.close()
def test_case_1_verify():
node = global_variable.node
my_id = node.current_id_count
infile = '5nodes/transactions%d.txt' % my_id
inf = open(infile)
total_c = 0
for line in inf:
words = line.split(" ")
recipient_id = int(re.sub("[^0-9]", "", words[0]))
amount = int(words[1])
recipient_pubkey = node.peers[recipient_id][0]
node.sent_transactions_test[(recipient_id, amount)] = False
total_c += 1
inf.close()
my_sent_txs = node.sent_transactions_test
outfile = 'logs/test1/test1_node%d.log' % my_id
outf = open(outfile, 'w')
for block in node.blockchain.chain:
for transaction in block.transactions:
my_pkey = node.peers[my_id][0]
receiver = [idx for idx, peer in enumerate(node.peers) if peer[0] == transaction.recipient_address][0]
# sender = [idx for idx, peer in enumerate(node.peers) if peer[0] == transaction.sender_address][0]
if transaction.sender_address == my_pkey:
if (receiver, transaction.amount) not in my_sent_txs:
s = "Error(test1): i see transaction i did not send! (%d to node%d)\n" % (
transaction.amount, receiver)
print(s, end='')
outf.write(s)
else:
s = "Success(test1): i see transaction in block %d (%d to node%d)\n" % (
block.index, transaction.amount, receiver)
print(s, end='')
outf.write(s)
my_sent_txs[(receiver, transaction.amount)] = True
c = 0
for tx in my_sent_txs:
if my_sent_txs[tx] == False:
s = "Error(test1):I don't see in blockchain my transaction!(id%d %d)\n" % tx
print(s, end='')
outf.write(s)
c += 1
s = "test case 1 finish!! %d out of %d transactions sucessfull\n" % (total_c - c, total_c)
print(s)
outf.write(s)
outf.close()
def print_help():
print(
'''
Welcome to Noobcash!
commands:
t <recipient_address> <amount> Transfer coins to public key specified
tff Transfer money from default file fast but unsafe
tff Transfer money from default file safer, but with a delay
test Same as ttf but you can verify the results with test_v
test_v Verify which transaction from the send ones is in the blockchain
bl Print all the blockchain
results Rights the statistic results in the result folder (testing use)
init Send initial money to all registered nodes if you are the bootstrap node
view View previous transactions
vv View previous transactions in more details
balance View wallet balance
id Print client's id
help Print this help message
q Quit
'''
)
def print_invalid_command():
print("Invalid command. Use \"help\" to view available options.")
def print_transaction_help():
print("t <recipient_address> <amount> Transfer coins to public key specified")
# -------------------------------- Not used yet -------------------------------- #
def valid_pkey(str):
return True
def valid_ammount(str):
return True
def print_balance():
print("balance")
main()
def register_user_request(port):
global node
# kainourgio public & private key
wallet = Wallet()
public_key_json = jsonpickle.encode(wallet.public_key)
url = global_variable.bootstrapIp
headers = {'Content-Type': "application/json"}
print("Registering to bootstrap...")
# edw perimenoume apantisi apo bootstrap gia to id mas, peers, blockchain(me prwto block)
# stelnoume to public key mas
r = requests.post(url,
data=public_key_json,
headers=headers)
data = r.json()
peers = jsonpickle.decode(data['results'][0]['peers'])
blockchain = jsonpickle.decode(data['results'][0]['blockchain'])
node_id = data['results'][0]['node_id']
node = Node(node_id)
node.blockchain = blockchain
node.peers = peers
return