def mining():
print("Into the mining process")
# Initializing Election Class
elec = Election()
# Do not make a block if mempool is empty
# if elec.redis_client.llen("mempool") == 0:
# print("No block made! Mempool is empty!")
# return
# Transaction verification
# Initializing Block Class
blk = Block()
# Create Coinbase Transaction
blk.create_coinbase_transaction()
# Connect to Previous Block
blk.add_previous_block()
# Scan Mempool
vd = True
for i in range(0, elec.redis_client.llen("mempool")):
# Get Transaction
tx = elec.redis_client.lindex('mempool', i).decode('utf-8')
if tx == None:
# Exit if tx is None
break
# Get tx verification verdict
# verify_verdict = elec.verification.verify_tx(tx)
# if verify_verdict == "verified":
# # Sending data to block
# blk.add_transaction(tx)
# else:
# vd = False
# print("Some Transaction Verification Failed! Aborting Mining ...")
# break
# If Tx Verification Fails
if vd == False:
print("Mining Aborted!")
return
# create block
blk.compute_hash()
blk.calculate_merkle_root()
block = blk
# add block
blkChain = BlockChain()
blkChain.add_block(block)
print("Block added to this Node's blockchain!")
# check
# full Blockchain verify
# full_verify_message = elec.verification.full_chain_verify()
# if msg != "verified":
# return sync.chainsync()
# if full_verify_message == "verified":
# braodcast the block you made
print("Broadcasting block made by this node ...")
udphandler = UDPHandler()
udphandler.sendblock(block.to_json())
def final_addr_balance(self, addr):
""" This function scans the complete blockchain and returns
the total balance of an Address """
chain_length = self.redis_client.llen('chain')
total = 0
used_transactions = set()
while chain_length > 0:
block = Block.from_json(
json.loads(
self.redis_client.lindex('chain', chain_length -
1).decode('utf-8')))
for tx in block.transactions:
for inp in tx.inputs:
if inp.address == addr:
used_transactions.add((inp.previous_tx, inp.index))
for out_index, out in enumerate(tx.outputs):
if tx.hash not in used_transactions:
if out.address == addr:
total = total + out.value
else:
if out.address == addr and (
tx.hash, out_index) not in used_transactions:
total = total + out.value
chain_length -= 1
return total
def test_merkle_root(self):
block = Block()
tx = Transaction()
input = TransactionInput()
input.address = "test_address"
tx.add_input(input)
tx.generate_hash()
block.add_transaction(tx)
block.calculate_merkle_root()
initial_merkle_root = block.merkle_root
tx1 = Transaction()
input1 = TransactionInput()
input1.address = "another_test_address"
tx1.add_input(input1)
tx1.generate_hash()
block.add_transaction(tx1)
block.calculate_merkle_root()
final_merkle_root = block.merkle_root
self.assertNotEqual(initial_merkle_root, final_merkle_root)
def get_block_by_hash(self, hash: str) -> Block:
chain_length = self.redis_client.llen('chain')
while chain_length > 0:
block = Block.from_json(
json.loads(
self.redis_client.lindex('chain', chain_length -
1).decode('utf-8')))
if block.hash == hash:
return block
chain_length -= 1
return
def test_txs_by_address(self):
blockchain = BlockChain()
blockchain.flush_chain()
block = Block()
tx = Transaction()
input1 = TransactionInput()
input1.address = "test_address"
tx.add_input(input1)
tx.generate_hash()
block.add_transaction(tx)
tx1 = Transaction()
output = TransactionOutput()
output.address = "fake_address"
output1 = TransactionOutput()
output1.address = "test_address"
tx1.add_output(output)
tx1.add_output(output1)
tx1.generate_hash()
block.add_transaction(tx1)
tx2 = Transaction()
output2 = TransactionOutput()
output2.address = "fake_address"
tx2.add_output(output2)
tx2.generate_hash()
block.add_transaction(tx2)
block.compute_hash()
blockchain.add_block(block)
txs = blockchain.get_txs_by_addr("test_address")
getb = blockchain.get_block(-1)
print(getb.to_json())
for tx in txs:
print(tx.hash, end='\n')
# self.assertEqual(len(txs), 2)
print(len(txs))
blockchain.close()
def get_tx_by_hash(self, hash: str):
chain_length = self.redis_client.llen('chain')
while chain_length > 0:
block = Block.from_json(
json.loads(
self.redis_client.lindex('chain', chain_length -
1).decode('utf-8')))
for tx in block.transactions:
if tx.hash == hash:
return tx
chain_length -= 1
return
def full_chain_verify(self):
verify_message = "unverified"
if self.chain_length == 0:
return "Empty Chain! Verification failed!"
for i in range(0, self.chain_length):
raw = json.loads(self.redis_client.lindex('chain', i).decode('utf-8'))
block = Block.from_json(raw)
block.calculate_merkle_root()
v_merkl_root = block.merkle_root
if v_merkl_root != raw["merkle_root"]:
verify_message = "failed"
self.del_from_faultblock(i)
return verify_message
verify_message = "verified"
return verify_message
def sendblock(self, request=None, response=None):
""" Send block """
if request is None and response is None:
# If no data is being passed on by command handler
pass
if request is not None:
# Processing requests
UDPHandler.broadcastmessage(
json.dumps({
"prev_command": "sendblock",
"body": request
}))
if response is not None:
# Processing reaponse
blkc = BlockChain()
blkc.add_block(Block.from_json(response["body"]))
blkc.close()
def get_txs_by_addr(self, addr) -> List[Transaction]:
txs = []
chain_length = self.redis_client.llen('chain')
while chain_length > 0:
block = Block.from_json(
json.loads(
self.redis_client.lindex('chain', chain_length -
1).decode('utf-8')))
print(len(block.transactions))
for tx in block.transactions:
inp_adresses = [inp.address for inp in tx.inputs]
if addr in inp_adresses:
txs.append(tx)
continue
out_adresses = [out.address for out in tx.outputs]
if addr in out_adresses:
txs.append(tx)
continue
chain_length -= 1
return txs
def get_utxos_by_addr(self, addr) -> List[Tuple[str, int, float]]:
utxos = []
chain_length = self.redis_client.llen('chain')
used_transactions = set()
while chain_length > 0:
block = Block.from_json(
json.loads(
self.redis_client.lindex('chain', chain_length -
1).decode('utf-8')))
for tx in block.transactions:
for inp in tx.inputs:
if inp.address == addr:
used_transactions.add((inp.previous_tx, inp.index))
for out_index, out in enumerate(tx.outputs):
if tx.hash not in used_transactions:
if out.address == addr:
utxos.append((tx.hash, out_index, out.value))
else:
if out.address == addr and (
tx.hash, out_index) not in used_transactions:
utxos.append((tx.hash, out_index, out.value))
chain_length -= 1
return utxos
from trucoin.Block import Block
from trucoin.Transaction import Transaction
from trucoin.TransactionInput import TransactionInput
from trucoin.TransactionOutput import TransactionOutput
import time
import sys
from utils import getsize, getbytes
output = TransactionOutput()
output.address = "1d3f347aada53547142da8edea5e0019e6ef31bb15"
output.n = 0
output.value = 50
transaction = Transaction()
transaction.add_output(output)
transaction.is_coinbase = True
transaction.hash = "eef9fda50a6bf6c11c5078d8772d94jk"
block = Block()
block.add_transaction(transaction)
block.calculate_merkle_root()
block.compute_hash()
block.miner = "1d3f347aada53547142da8edea5e0019e6ef31bb15jk"
block.size = getbytes(block)
print(block.__dict__)
message = {
"hash": block.hash,
"timestamp": block.timestamp,
"transaction": block.transactions[0].broadcast_transaction(),
"previous_block_hash": block.previous_block_hash,
"merkle_root": block.merkle_root,
"height": block.height,
"miner": block.miner,
"version": block.version,
def __init__(self):
blockchain = BlockChain()
self.block = Block()
self.redis_client = redis.Redis(host='localhost', port=6379, db=0)
self.chain_length = self.redis_client.llen('chain')
# "outputs": [
# {
# "value": 50,
# "n": 0,
# "address": addr
# }
# ],
# "hash": "eef9fda50a6bf6c11c5078d8772d94df4f60ce54573c009f145eb047426ad0fb",
# "block": "16e8dab3a9185d5329fac9cfdc0a81c7817826f701e747cb3751878061e4dc8c"
# }],
# "previous_block_hash": "",
# "merkle_root": "78bc90dcc3fe2ae1eca8b9d4e09b63653cd18f0b583e002b2b4d43cc09fca9cd",
# "height": 0,
# "version": "0.0.1",
# "size": 1949
# }))
for i in range(1):
block = Block()
block.add_previous_block()
block.add_transaction(create_fake_transaction(
global_addresses[random.randint(0, 9)]))
block.create_coinbase_transaction()
block.calculate_merkle_root()
block.compute_hash()
block.calcalute_block_size()
redis_client.rpush("chain", json.dumps(block.to_json()))
# print(block.to_json())
udphandler = UDPHandler()
udphandler.sendblock(block.to_json())
def create_block(self):
block = Block()
block.create_coinbase_transaction()
mempool = Mempool()
blkc = BlockChain()
mempool_size = mempool.get_len()
if mempool_size == 0:
return
while mempool_size > 0:
tx = mempool.get_transaction()
block.add_transaction(tx)
mempool_size -= 1
block.calcalute_block_size()
block.calculate_merkle_root()
block.compute_hash()
blkc.add_block(block)
return block
def get_block(self, index: int) -> Block:
raw = self.redis_client.lindex("chain", index)
if raw is not None:
return Block.from_json(json.loads(raw.decode("utf-8")))
else:
return
def add_block(self, blk: Block):
self.redis_client.rpush('chain', json.dumps(blk.to_json()))
