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miner.py
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miner.py
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import hashlib
import time
import binascii
import requests
import os
import json
import time
import random
from src.utilities import Generate
from Crypto.PublicKey import RSA
import random
from Crypto.Signature import pkcs1_15
from Crypto.Hash import SHA256
from multiprocessing import Process
#from tqdm import tqdm
from src.utilities import Hash, Write
class Miner:
def __init__(self):
self.thread_number = 1
self.node = '192.168.0.250:5000'
if not os.path.isfile('data/wallet.json'):
Generate.generate_wallet()
wallet_file = json.load(open('data/wallet.json', 'r'))
self.private_key = RSA.import_key(wallet_file['private key'])
self.public_key = RSA.import_key(wallet_file['public key'])
self.public_key_hex = wallet_file['public key hex']
self.public_key_hash = wallet_file['public key hash']
def get_mempool(self):
response = requests.get(f'http://{self.node}/mempool')
if response.status_code == 200:
return response.json()
@staticmethod
def valid_proof(target_nonce, block):
encoded_block = f'{block}'.encode()
value = int.from_bytes(hashlib.sha256(encoded_block).digest(), 'little')
if value <= target_nonce:
return True
if value >= target_nonce:
return False
def get_fees(self):
value = requests.get(f'http://{self.node}/fees')
if value.status_code == 200:
return value.json()
def get_difficulty(self):
value = requests.get(f'http://{self.node}/difficulty')
if value.status_code == 200:
return value.json()
def get_last_block(self):
response = requests.get(f'http://{self.node}/lastblock')
if response.status_code == 200:
return response.json()
def get_coinbase(self):
value = requests.get(f'http://{self.node}/coinbase')
if value.status_code == 200:
return value.json()
def get_last_nonce(self):
response = requests.get(f'http://{self.node}/nonce')
if response.status_code == 200:
return response.json()
else:
print("couldn't obtain proof")
def get_last_hash(self):
last_block = self.get_last_block()
last_block_hash = last_block['block_hash']
return last_block_hash
def sign_transaction_data(self, data):
transaction_bytes = json.dumps(data, sort_keys=True).encode('utf-8')
hash_object = SHA256.new(transaction_bytes)
signature = pkcs1_15.new(self.private_key).sign(hash_object)
return binascii.hexlify(signature).decode("utf-8")
def sign(self, data):
signature_hex = binascii.hexlify(self.sign_transaction_data(data)).decode("utf-8")
return signature_hex
def coinbase_transaction(self, coinbase_amount, unix_millis, previous_hash):
transaction = {
'sender': "Coinbase Reward",
'recipient': self.public_key_hash,
'amount': coinbase_amount,
'fee': 0,
'time_submitted': unix_millis,
'previous_hash': previous_hash,
'public_key_hex': self.public_key_hex
}
transaction_hash = Hash.hash(transaction)
transaction_with_hash = {
'sender': "Coinbase Reward",
'recipient': self.public_key_hash,
'amount': coinbase_amount,
'fee': 0,
'time_submitted': unix_millis,
'previous_hash': previous_hash,
'public_key_hex': self.public_key_hex,
'transaction_hash': transaction_hash
}
trans_sig = self.sign_transaction_data(data=transaction_with_hash)
transaction_with_sig = {
'sender': "Coinbase Reward",
'recipient': self.public_key_hash,
'amount': coinbase_amount,
'fee': 0,
'time_submitted': unix_millis,
'previous_hash': previous_hash,
'public_key_hex': self.public_key_hex,
'transaction_hash': transaction_hash,
'signature': trans_sig
}
return transaction_with_sig
def fee_reward_transaction(self, fee_amount, unix_millis, previous_hash):
transaction = {
'sender': "Fee Reward",
'recipient': self.public_key_hash,
'amount': fee_amount,
'fee': 0,
'time_submitted': unix_millis,
'previous_hash': previous_hash,
'public_key_hex': self.public_key_hex
}
transaction_hash = Hash.hash(transaction)
transaction_with_hash = {
'sender': "Fee Reward",
'recipient': self.public_key_hash,
'amount': fee_amount,
'fee': 0,
'time_submitted': unix_millis,
'previous_hash': previous_hash,
'public_key_hex': self.public_key_hex,
'transaction_hash': transaction_hash
}
trans_sig = self.sign_transaction_data(data=transaction_with_hash)
transaction_with_sig = {
'sender': "Fee Reward",
'recipient': self.public_key_hash,
'amount': fee_amount,
'fee': 0,
'time_submitted': unix_millis,
'previous_hash': previous_hash,
'public_key_hex': self.public_key_hex,
'transaction_hash': transaction_hash,
'signature': trans_sig
}
return transaction_with_sig
@staticmethod
def hash(block):
"""
Creates a SHA-256 hash of a Block
:param block: Block
"""
# We must make sure that the Dictionary is Ordered, or we'll have inconsistent hashes
block_string = json.dumps(block, sort_keys=True).encode()
return hashlib.sha256(block_string).hexdigest()
def mine(self):
while True:
difficulty = self.get_difficulty()
last_block = self.get_last_block()
target = self.get_last_nonce()
target_hex = hex(target)
transactions = []
unix_time = time.time()
pending_fees = self.get_fees()
coinbase = self.get_coinbase()
coinbase_reward_transaction = self.coinbase_transaction(coinbase_amount=coinbase, unix_millis=unix_time, previous_hash=last_block['block_hash'])
mempool = self.get_mempool()
transactions.append(coinbase_reward_transaction)
round_end = time.time() + 30
if pending_fees > 0:
fee_reward_transaction = self.fee_reward_transaction(fee_amount=pending_fees, unix_millis=unix_time,
previous_hash=last_block['block_hash'])
transactions.append(fee_reward_transaction)
if len(mempool) > 0:
for transaction in mempool:
transactions.append(transaction)
print("Round Start!")
while time.time() < round_end:
unix_time = time.time()
nonce = random.randint(1, 100000000000000000000000000000000000000000000)
unforged_block = {
'index': last_block['index'] + 1,
'difficulty': difficulty,
'previous_hash': last_block['block_hash'],
'nonce': nonce,
'target_nonce_hex': target_hex,
'timestamp': unix_time,
'transactions': transactions
}
if self.valid_proof(target, unforged_block):
block_hash = Hash.hash(unforged_block)
block_with_hash = {
'index': unforged_block['index'],
'difficulty': unforged_block['difficulty'],
'previous_hash': unforged_block['previous_hash'],
'block_hash': block_hash,
'nonce': unforged_block['nonce'],
'target_nonce_hex': unforged_block['target_nonce_hex'],
'timestamp': unforged_block['timestamp'],
'transactions': unforged_block['transactions'],
'public_key': self.public_key_hex
}
block_sig = self.sign_transaction_data(data=block_with_hash)
forged_block = {
'index': unforged_block['index'],
'difficulty': unforged_block['difficulty'],
'previous_hash': unforged_block['previous_hash'],
'block_hash': block_hash,
'nonce': unforged_block['nonce'],
'target_nonce_hex': unforged_block['target_nonce_hex'],
'timestamp': unforged_block['timestamp'],
'transactions': unforged_block['transactions'],
'public_key': self.public_key_hex,
'signature': block_sig
}
headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
response = requests.post(f'http://{self.node}/block', json=forged_block,
headers=headers)
if response.status_code == 200:
print("new block forged!")
break
else:
print("error")
break
Miner = Miner()
Miner.mine()