def __init__(self,ip,port,key=None):
self.p2p=None
self.ip=ip
self.port=port
self.transitionPool=TransactionPool()
self.wallet=Wallet()
self.blockChain=BlockChain()
if key is not None:
self.wallet.formKey(key)
def __init__(self, recipient):
# initialise blockchain
blockchain = BlockChain()
print("***Mining phoenixChain coin about to start***")
# print the blockchain data
print(blockchain.chain)
# obtain last block
last_block = blockchain.last_block
# latest hashed block
last_proof_no = last_block.production_no
# construct a blockchain
production_no = blockchain.construct_proof_of_work(last_proof_no)
# send
blockchain.new_data(
sender="0", # it implies that this node has created a new block
recipient=str(recipient), # send coins!
quantity=
1, # creating a new block (or identifying the proof number) is awarded with 1
)
# stores the latest blocks created
last_hash = last_block.production_no
# stores the the amount produced and the latest hashed block in the new block
block = blockchain.construct_block(production_no, last_hash)
print("***Mining phoenixChain coin has been successful***")
print(blockchain.chain);
def mine():
# Forge the new Block
block = blockchain.new_block()
response = {
'message': "New Block Forged",
'index': block['index'],
'transaction': block['transactions'],
'proof': block['proof'],
'previous_hash': block['previous_hash'],
'block_hash': BlockChain.hash(block)
}
for node in blockchain.nodes:
if node == blockchain.host:
continue
try:
requests.get(f"http://{node}/nodes/resolve", timeout=0.5)
except requests.exceptions.Timeout:
continue
return jsonify(response), 200
import hashlib
import random
import time
import math
import json
import KeyGen
from Miner import Miner
from Users import user_db
from Blockchain import BlockChain
from Transaction import Transaction
if __name__ == "__main__":
sutdcoin = BlockChain()
users = list(user_db.keys())
t1 = Transaction(users[0], users[2], 80, "user0 -(80)-> user2")
t2 = Transaction(users[0], users[1], 30, "user0 -(30)-> user1")
sutdcoin.add_transaction_to_pool([t1, t2])
user3 = Miner(users[3], sutdcoin)
user3.mine()
print("\nsutdcoin blockchain graph:", sutdcoin.graph)
print("\nsutdcoin user_db:", user_db)
class Node():
def __init__(self,ip,port,key=None):
self.p2p=None
self.ip=ip
self.port=port
self.transitionPool=TransactionPool()
self.wallet=Wallet()
self.blockChain=BlockChain()
if key is not None:
self.wallet.formKey(key)
def startP2P(self):
self.p2p=SocketCommunication(self.ip,self.port)
self.p2p.startSocketCommunication(self)
def startAPI(self,apiPort):
self.api=NodeAPI()
self.api.injectNode(self)
self.api.start(apiPort)
def handleTransaction(self,transaction):
data=transaction.payload()
signature=transaction.signature
signerPublicKey=transaction.senderPublicKey
signatureValid=Wallet.signatureValid(data,signature,signerPublicKey)
transactionExists=self.transitionPool.transactionExists(transaction)
transactionInBlockExists=self.blockChain.transactionExists(transaction)
if not transactionExists and not transactionInBlockExists and signatureValid:
self.transitionPool.addTransaction(transaction)
message=Message(self.p2p.socketConnector,'TRANSACTION',transaction)
encodedMessage=BlockchainUtils.encode(message)
self.p2p.broadcast(encodedMessage)
forginRequired=self.transitionPool.forgerRequired()
if forginRequired:
self.forge()
def handleBlock(self,block):
forger=block.forger
blockHash=block.payload()
signature=block.signature
blockCountValid= self.blockChain.blockCountValid(block)
lastBlockHashValid=self.blockChain.lastBlockHashValid(block)
def forge(self):
forger=self.blockChain.nextForger()
print(forger)
print(self.wallet.publicKeyString())
if forger == self.wallet.publicKeyString():
print("i am the next forger")
block=self.blockChain.createBlock(self.transitionPool.transactions,self.wallet)
self.transitionPool.removeFromPool(block.transactions)
message=Message(self.p2p.socketConnector,'BLOCK',block)
encodedMessage=BlockchainUtils.encode(message)
self.p2p.broadcast(encodedMessage)
else:
print("i am not the next forger")
import curses from curses import KEY_RIGHT, KEY_LEFT, KEY_DOWN, KEY_UP import csv import time import datetime import hashlib import json import socket import select import sys import threading from Blockchain import NodoBlock, BlockChain from ArbolAVL import NodoAVL,ArbolAVL bloque=BlockChain() index=0 clase="" timestamp="" cadenajson="" salida="" prevhash="" Hash="" codificar=hashlib.sha256() flag_send=False username="" selectblock=0 inorden="" postorden="" preorden="" server = socket.socket(socket.AF_INET, socket.SOCK_STREAM)
# -*- coding: utf-8 -*-
# @Time : 2021/3/30 15:11
# @Author : LTstrange
import requests
from Blockchain import BlockChain
from flask import Flask, jsonify, request, render_template, redirect
# Instantiate our Node
app = Flask(__name__)
# Instantiate the Blockchain
blockchain = BlockChain()
# GUI part
@app.route('/', methods=['POST', 'GET'])
def index():
blockchain.host = request.host
blockchain.register_node(blockchain.host)
if request.method == 'GET':
return render_template('index.html',
host=blockchain.host,
identifier=blockchain.Account)
@app.route('/login/Page', methods=['GET'])
def login():
return render_template('login.html'), 200
@app.route('/login_account', methods=['POST'])
from Blockchain import BlockChain
# Creating a new block chain
block_chain = BlockChain()
# test case, operations on an empty block chain
print("\nChecking TEST_CASE_1: Empty block chain\n")
# size of block chain
print("The size of block chain is: "+str(block_chain.get_size()))
# block chain head block
print("The head of block chain is: "+str(block_chain.get_head()))
# searching for a block which doesn't exist
print("Is there a block with data '1' in the block chain ? "+str(block_chain.find_block('1')))
# printing the list of all blocks in the block chain
print("The list of blocks in the block chain are: "+str(block_chain.get_blocks()))
# adding a block
block_chain.add_block("1")
print("Added a block with data '1' to the empty block chain...")
'''
Checking TEST_CASE_1: Empty block chain
The size of block chain is: 0
The head of block chain is: None
Is there a block with data '1' in the block chain ? -1
The list of blocks in the block chain are: []
Added a block with data '1' to the empty block chain...
'''
# test case, operations on a block chain which includes 1 block
print("\nChecking TEST_CASE_2: block chain with a single block\n")
# size of block chain