def mine_block():
logger.debug('Checking for sync locks...')
if SyncLock.objects.count():
logger.debug("Looks like we're syncing, canceling mine_block call.")
return
logger.debug('Mining new block...')
broadcast = None
with transaction.atomic():
# Get the active block
active_block = Block.get_active_block()
logger.debug(f'{active_block.id} is the active block.')
# Collect the unconfirmed transactions
unconfirmed = UnconfirmedTransaction.objects.all()
logger.debug(f'{len(unconfirmed)} unconfirmed transactions found.')
# Prune invalid transactions
transactions = prune_invalid_transactions(active_block, unconfirmed)
logger.debug(f'{len(transactions)} transactions after pruning.')
# Convert the unconfirmed transactions and add the block reward
transactions = [u.to_transaction() for u in transactions]
transactions.insert(0, Transaction.create_block_reward())
# Set up the block
block = Block(
previous_block=active_block,
depth=active_block.depth + 1,
miner=settings.MINER_PUBLIC_KEY,
extra_data=settings.BLOCK_EXTRA_DATA,
time=now(),
)
block.set_merkle_root(transactions)
block.set_balances(
apply_transactions_to_balances(
transactions,
active_block.get_balances(),
))
block.set_hash()
block.sign()
# Validate the block and transactions
if validate_block(block, transactions):
# Save the block
block.save(transactions)
UnconfirmedTransaction.objects.all().delete()
broadcast = block
logger.info(f'Block {block.id} successfully mined.')
else:
logger.info('Failed to mine block - validation error!')
if broadcast:
from boocoin.p2p import broadcast_block
broadcast_block(broadcast)
def handle(self, *args, **options):
miners = options['miner_public_keys']
# Verify the user doesn't already have a genesis block
if Block.objects.count() > 0:
sys.stderr.write("You already have a genesis block!\n")
sys.exit(1)
# This block will be signed by the miner, so its key must be included
if settings.MINER_PUBLIC_KEY not in miners:
sys.stderr.write("Your public key must be included.\n")
sys.exit(1)
# Set up the first transaction
transaction = Transaction.create_block_reward()
transactions = [transaction]
# Set up the genesis block
block = Block(
depth=0,
miner=settings.MINER_PUBLIC_KEY,
extra_data=json.dumps(miners).encode('utf-8'),
time=now(),
)
block.set_merkle_root(transactions)
block.set_balances(apply_transaction_to_balances(transaction, {}))
block.set_hash()
block.sign()
block.save(transactions)
# Store the genesis block information in a file
call_command('dumpdata',
'boocoin.Block',
'boocoin.Transaction',
indent=4,
output='genesis.json')
self.stdout.write('Genesis block saved to db and genesis.json\n')