Esempio n. 1
0
 def blockchain(self):
     """Returns the current Blockchain object."""
     if self.client:
         return self.client.blockhandler.block_chain
     else:
         blockchain = BlockChain(
             did_lock_to_index_f=self.bcs.did_lock_to_index)
         blockchain.preload_locked_blocks(self.bcs.headers())
         return blockchain
Esempio n. 2
0
    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())
Esempio n. 3
0
    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
            try:
                abstract_server = yield from asyncio.get_event_loop().create_server(
                    protocol_factory=create_protocol_callback, port=server_port)
                return abstract_server
            except OSError:
                logging.info("can't listen on port %d", server_port)

        if server_port:
            self.server_task = asyncio.Task(run_listener())