def items_for_client(initial_blocks=[]):
block_store = {}
block_chain = BlockChain()
blockfetcher = Blockfetcher()
inv_collector = InvCollector()
block_handler = BlockHandler(inv_collector, block_chain, block_store)
fast_forward_add_peer = fast_forwarder_add_peer_f(block_chain)
for block in initial_blocks:
inv_collector.advertise_item(InvItem(ITEM_TYPE_BLOCK, block.hash()))
block_store[block.hash()] = block
block_chain.add_headers(initial_blocks)
inv_q = inv_collector.new_inv_item_queue()
ap = make_add_peer(fast_forward_add_peer, blockfetcher, block_handler,
inv_collector, block_chain, block_store)
ap.block_getter_task = asyncio.Task(
block_getter(inv_q, inv_collector, block_handler, block_chain,
block_store))
return block_handler, block_chain, block_store, ap
def main():
parser = argparse.ArgumentParser(description="Watch Bitcoin network for new blocks.")
parser.add_argument('-c', "--config-dir", help='The directory where config files are stored.')
parser.add_argument(
'-f', "--fast-forward", type=int,
help="block index to fast-forward to (ie. don't download full blocks prior to this one)", default=0
)
parser.add_argument(
'-d', "--depth", type=int,
help="Minimum depth blocks must be buried before being dropped in blockdir", default=2
)
parser.add_argument( '-l', "--log-file", help="Path to log file", default=None)
parser.add_argument("blockdir", help='The directory where new blocks are dropped.')
asyncio.tasks._DEBUG = True
logging.basicConfig(level=logging.DEBUG, format=LOG_FORMAT)
logging.getLogger("asyncio").setLevel(logging.INFO)
if 1:
host_port_q = dns_bootstrap_host_port_q(MAINNET)
else:
host_port_q = asyncio.Queue()
host_port_q.put_nowait(("127.0.0.1", 8333))
args = parser.parse_args()
if args.log_file:
log_file(args.log_file)
block_chain_store = BlockChainStore(args.config_dir)
block_chain = BlockChain(did_lock_to_index_f=block_chain_store.did_lock_to_index)
locker_task = block_chain_locker(block_chain)
block_chain.add_nodes(block_chain_store.block_tuple_iterator())
blockfetcher = Blockfetcher()
inv_collector = InvCollector()
block_store = TwoLevelDict()
@asyncio.coroutine
def _rotate(block_store):
while True:
block_store.rotate()
yield from asyncio.sleep(1800)
rotate_task = asyncio.Task(_rotate(block_store))
blockhandler = BlockHandler(inv_collector, block_chain, block_store,
should_download_f=lambda block_hash, block_index: block_index >= args.fast_forward)
last_processed_block = max(get_last_processed_block(config_dir), args.fast_forward)
update_last_processed_block(config_dir, last_processed_block)
change_q = asyncio.Queue()
from pycoinnet.util.BlockChain import _update_q
block_chain.add_change_callback(lambda blockchain, ops: _update_q(change_q, ops))
block_processor_task = asyncio.Task(
block_processor(
change_q, blockfetcher, args.config_dir, args.blockdir, args.depth)))
fast_forward_add_peer = fast_forwarder_add_peer_f(block_chain)
fetcher_task = asyncio.Task(new_block_fetcher(inv_collector, block_chain))
def create_protocol_callback():
peer = BitcoinPeerProtocol(MAINNET["MAGIC_HEADER"])
install_pingpong_manager(peer)
fetcher = Fetcher(peer)
peer.add_task(run_peer(
peer, fetcher, fast_forward_add_peer,
blockfetcher, inv_collector, blockhandler))
return peer
connection_info_q = manage_connection_count(host_port_q, create_protocol_callback, 8)
show_task = asyncio.Task(show_connection_info(connection_info_q))
asyncio.get_event_loop().run_forever()
def __init__(self,
network,
host_port_q,
should_download_block_f,
block_chain_store,
blockchain_change_callback,
server_port=9999):
"""
network:
a value from pycoinnet.helpers.networks
host_port_q:
a Queue that is being fed potential places to connect
should_download_block_f:
a function that accepting(block_hash, block_index) and returning a boolean
indicating whether that block should be downloaded. Only used during fast-forward.
block_chain_store:
usually a BlockChainStore instance
blockchain_change_callback:
a callback that expects (blockchain, list_of_ops) that is invoked whenever the
block chain is updated; blockchain is a BlockChain object and list_of_ops is a pair
of tuples of the form (op, block_hash, block_index) where op is one of "add" or "remove",
block_hash is a binary block hash, and block_index is an integer index number.
"""
block_chain = BlockChain(
did_lock_to_index_f=block_chain_store.did_lock_to_index)
block_chain.preload_locked_blocks(block_chain_store.headers())
block_chain.add_change_callback(block_chain_locker_callback)
self.blockfetcher = Blockfetcher()
self.inv_collector = InvCollector()
self.block_store = TwoLevelDict()
@asyncio.coroutine
def _rotate(block_store):
while True:
block_store.rotate()
yield from asyncio.sleep(1800)
self.rotate_task = asyncio.Task(_rotate(self.block_store))
self.blockhandler = BlockHandler(
self.inv_collector,
block_chain,
self.block_store,
should_download_f=should_download_block_f)
block_chain.add_change_callback(blockchain_change_callback)
self.fast_forward_add_peer = fast_forwarder_add_peer_f(block_chain)
self.fetcher_task = asyncio.Task(
new_block_fetcher(self.inv_collector, block_chain))
self.nonce = int.from_bytes(os.urandom(8), byteorder="big")
self.subversion = "/Notoshi/".encode("utf8")
@asyncio.coroutine
def run_peer(peer, fetcher, fast_forward_add_peer, blockfetcher,
inv_collector, blockhandler):
yield from asyncio.wait_for(peer.connection_made_future,
timeout=None)
version_parameters = version_data_for_peer(
peer,
local_port=(server_port or 0),
last_block_index=block_chain.length(),
nonce=self.nonce,
subversion=self.subversion)
version_data = yield from initial_handshake(
peer, version_parameters)
last_block_index = version_data["last_block_index"]
fast_forward_add_peer(peer, last_block_index)
blockfetcher.add_peer(peer, fetcher, last_block_index)
inv_collector.add_peer(peer)
blockhandler.add_peer(peer)
def create_protocol_callback():
peer = BitcoinPeerProtocol(network["MAGIC_HEADER"])
install_pingpong_manager(peer)
fetcher = Fetcher(peer)
peer.add_task(
run_peer(peer, fetcher, self.fast_forward_add_peer,
self.blockfetcher, self.inv_collector,
self.blockhandler))
return peer
self.connection_info_q = manage_connection_count(
host_port_q, create_protocol_callback, 8)
self.show_task = asyncio.Task(
show_connection_info(self.connection_info_q))
# listener
@asyncio.coroutine
def run_listener():
abstract_server = None
future_peer = asyncio.Future()
try:
abstract_server = yield from asyncio.get_event_loop(
).create_server(protocol_factory=create_protocol_callback,
port=server_port)
return abstract_server
except OSError as ex:
logging.info("can't listen on port %d", server_port)
if server_port:
self.server_task = asyncio.Task(run_listener())
def __init__(self,
network,
initial_blockchain_view,
bloom_filter,
block_index_queue=None,
filter_f=lambda idx, h: True,
host_port_q=None):
"""
network:
a value from pycoinnet.helpers.networks
initial_blockchain_view:
BlockChainView instance which is update automatically
bloom_filter:
the filter sent to remotes
block_index_queue:
a Queue which is fed with (block, index) items which need to be processed
host_port_q:
a Queue that is being fed potential places to connect
"""
if host_port_q is None:
host_port_q = dns_bootstrap_host_port_q(network)
self.network = network
self.blockchain_view = initial_blockchain_view
self.bloom_filter = bloom_filter
self.block_futures = asyncio.Queue(maxsize=2000)
if block_index_queue is None:
block_index_queue = asyncio.Queue()
self._block_index_queue = block_index_queue
self.feed_task = asyncio.Task(self.feed_blocks())
self.blockfetcher = Blockfetcher()
self.inv_collector = InvCollector()
if bloom_filter:
self.get_future = self.blockfetcher.get_merkle_block_future
else:
self.get_future = self.blockfetcher.get_block_future
self.filter_f = filter_f
self.getheaders_add_peer = getheaders_add_peer_f(
self.blockchain_view, self.handle_reorg)
self.nonce = int.from_bytes(os.urandom(8), byteorder="big")
self.subversion = "/Notoshi/".encode("utf8")
@asyncio.coroutine
def run_peer(peer, fetcher, getheaders_add_peer, blockfetcher,
inv_collector):
yield from asyncio.wait_for(peer.connection_made_future,
timeout=None)
last_block_index = max(0, self.blockchain_view.last_block_index())
version_parameters = version_data_for_peer(
peer,
local_port=0,
last_block_index=last_block_index,
nonce=self.nonce,
subversion=self.subversion)
version_data = yield from initial_handshake(
peer, version_parameters)
if self.bloom_filter:
filter_bytes, hash_function_count, tweak = self.bloom_filter.filter_load_params(
)
# TODO: figure out flags
flags = 0
peer.send_msg("filterload",
filter=filter_bytes,
hash_function_count=hash_function_count,
tweak=tweak,
flags=flags)
last_block_index = version_data["last_block_index"]
getheaders_add_peer(peer, last_block_index)
blockfetcher.add_peer(peer, fetcher, last_block_index)
inv_collector.add_peer(peer)
def create_protocol_callback():
peer = BitcoinPeerProtocol(network["MAGIC_HEADER"])
install_pingpong_manager(peer)
fetcher = Fetcher(peer)
peer.add_task(
run_peer(peer, fetcher, self.getheaders_add_peer,
self.blockfetcher, self.inv_collector))
return peer
self.connection_info_q = manage_connection_count(
host_port_q, create_protocol_callback, 8)
self.show_task = asyncio.Task(
show_connection_info(self.connection_info_q))
def __init__(self, network, initial_blockchain_view, bloom_filter, merkle_block_index_queue,
filter_f=lambda idx, h: True, host_port_q=None):
"""
network:
a value from pycoinnet.helpers.networks
initial_blockchain_view:
BlockChainView instance which is update automatically
bloom_filter:
the filter sent to remotes
merkle_block_index_queue:
a Queue which is fed with (merkleblock, index) items which need to be processed
host_port_q:
a Queue that is being fed potential places to connect
"""
if host_port_q is None:
host_port_q = dns_bootstrap_host_port_q(network)
self.network = network
self.blockchain_view = initial_blockchain_view
self.bloom_filter = bloom_filter
self.merkle_block_futures = asyncio.Queue(maxsize=2000)
self.feed_task = asyncio.Task(self.feed_merkle_blocks(merkle_block_index_queue))
self.blockfetcher = Blockfetcher()
self.inv_collector = InvCollector()
self.filter_f = filter_f
self.getheaders_add_peer = getheaders_add_peer_f(self.blockchain_view, self.handle_reorg)
self.nonce = int.from_bytes(os.urandom(8), byteorder="big")
self.subversion = "/Notoshi/".encode("utf8")
@asyncio.coroutine
def run_peer(peer, fetcher, getheaders_add_peer, blockfetcher, inv_collector):
yield from asyncio.wait_for(peer.connection_made_future, timeout=None)
last_block_index = max(0, self.blockchain_view.last_block_index())
version_parameters = version_data_for_peer(
peer, local_port=0, last_block_index=last_block_index, nonce=self.nonce,
subversion=self.subversion)
version_data = yield from initial_handshake(peer, version_parameters)
filter_bytes, hash_function_count, tweak = self.bloom_filter.filter_load_params()
# TODO: figure out flags
flags = 0
peer.send_msg(
"filterload", filter=filter_bytes, hash_function_count=hash_function_count,
tweak=tweak, flags=flags)
last_block_index = version_data["last_block_index"]
getheaders_add_peer(peer, last_block_index)
blockfetcher.add_peer(peer, fetcher, last_block_index)
inv_collector.add_peer(peer)
def create_protocol_callback():
peer = BitcoinPeerProtocol(network["MAGIC_HEADER"])
install_pingpong_manager(peer)
fetcher = Fetcher(peer)
peer.add_task(run_peer(
peer, fetcher, self.getheaders_add_peer,
self.blockfetcher, self.inv_collector))
return peer
self.connection_info_q = manage_connection_count(host_port_q, create_protocol_callback, 8)
self.show_task = asyncio.Task(show_connection_info(self.connection_info_q))