2 from processor import Processor
11 # Create 3 thread-pools each with 1 thread
12 self.network_service = bitcoin.async_service(1)
13 self.disk_service = bitcoin.async_service(1)
14 self.mempool_service = bitcoin.async_service(1)
16 self.hosts = bitcoin.hosts(self.network_service)
17 self.handshake = bitcoin.handshake(self.network_service)
18 self.network = bitcoin.network(self.network_service)
19 self.protocol = bitcoin.protocol(self.network_service, self.hosts,
20 self.handshake, self.network)
22 db_prefix = "/home/genjix/libbitcoin/database"
23 self.blockchain = bitcoin.bdb_blockchain(self.disk_service, db_prefix)
24 self.poller = bitcoin.poller(self.blockchain)
25 self.transaction_pool = \
26 bitcoin.transaction_pool(self.mempool_service, self.blockchain)
28 self.protocol.subscribe_channel(self.monitor_tx)
30 bitcoin.session(self.hosts, self.handshake, self.network,
31 self.protocol, self.blockchain, self.poller,
32 self.transaction_pool)
33 self.session.start(self.handle_start)
35 def handle_start(self, ec):
37 print "Error starting backend:", ec
40 self.session.stop(self.handle_stop)
42 def handle_stop(self, ec):
44 print "Error stopping backend:", ec
45 print "Stopped backend"
47 def monitor_tx(self, node):
48 # We will be notified here when connected to new bitcoin nodes
49 # Here we subscribe to new transactions from them which we
50 # add to the transaction_pool. That way we can track which
51 # transactions we are interested in.
52 node.subscribe_transaction(
53 bitcoin.bind(self.recv_tx, bitcoin._1, bitcoin._2, node))
54 # Re-subscribe to next new node
55 self.protocol.subscribe_channel(self.monitor_tx)
57 def recv_tx(self, ec, tx, node):
59 print "Error with new transaction:", ec
61 tx_hash = bitcoin.hash_transaction(tx)
62 # If we want to ignore this transaction, we can set
63 # the 2 handlers to be null handlers that do nothing.
64 self.transaction_pool.store(tx,
65 bitcoin.bind(self.tx_confirmed, bitcoin._1, tx_hash),
66 bitcoin.bind(self.handle_mempool_store, bitcoin._1, tx_hash))
67 # Re-subscribe to new transactions from node
68 node.subscribe_transaction(
69 bitcoin.bind(self.recv_tx, bitcoin._1, bitcoin._2, node))
71 def handle_mempool_store(self, ec, tx_hash):
73 print "Error storing memory pool transaction", tx_hash, ec
75 print "Accepted transaction", tx_hash
77 def tx_confirmed(self, ec, tx_hash):
79 print "Problem confirming transaction", tx_hash, ec
81 print "Confirmed", tx_hash
86 self.event = threading.Event()
97 class NumblocksSubscribe:
99 def __init__(self, backend, processor):
100 self.backend = backend
101 self.processor = processor
102 self.lock = threading.Lock()
103 self.backend.blockchain.subscribe_reorganize(self.reorganize)
104 self.backend.blockchain.fetch_last_depth(self.set_last_depth)
105 self.latest = GhostValue()
107 def set_last_depth(self, ec, last_depth):
109 print "Error retrieving last depth", ec
111 self.latest.set(last_depth)
113 def reorganize(self, ec, fork_point, arrivals, replaced):
114 latest = fork_point + len(arrivals)
115 self.latest.set(latest)
116 self.processor.push_response({"method":"numblocks.subscribe", "result": latest})
117 self.backend.blockchain.subscribe_reorganize(self.reorganize)
120 class AddressGetHistory:
122 def __init__(self, backend, processor):
123 self.backend = backend
124 self.processor = processor
126 def get(self, request):
127 address = str(request["params"])
128 composed.payment_history(self.backend.blockchain, address,
129 bitcoin.bind(self.respond, request, bitcoin._1))
131 def respond(self, request, result):
132 self.processor.push_response({"id": request["id"], "method":request["method"], "params":request["params"], "result": result})
135 class LibbitcoinProcessor(Processor):
137 def __init__(self, config):
138 Processor.__init__(self)
139 self.backend = Backend()
140 self.numblocks_subscribe = NumblocksSubscribe(self.backend, self)
141 self.address_get_history = AddressGetHistory(self.backend, self)
146 def process(self, request):
148 print "New request (lib)", request
149 if request["method"] == "numblocks.subscribe":
150 self.numblocks_subscribe.subscribe(session, request)
151 elif request["method"] == "address.get_history":
152 self.address_get_history.get(request)
153 elif request["method"] == "server.banner":
154 self.push_response({"id": request["id"], "method": request["method"], "params":request["params"],
155 "result": "libbitcoin using python-bitcoin bindings"})
156 elif request["method"] == "transaction.broadcast":
157 self.broadcast_transaction(request)
158 # Execute and when ready, you call
159 # self.push_response(response)
161 def broadcast_transaction(self, request):
162 raw_tx = bitcoin.data_chunk(str(request["params"]))
163 exporter = bitcoin.satoshi_exporter()
165 tx = exporter.load_transaction(raw_tx)
167 response = {"id": request["id"], "method": request["method"], "params":request["params"], "result": None,
169 "Exception while parsing the transaction data.",
172 self.backend.protocol.broadcast_transaction(tx)
173 tx_hash = str(bitcoin.hash_transaction(tx))
174 response = {"id": request["id"], "method": request["method"], "params":request["params"], "result": tx_hash}
175 self.push_response(response)
178 # this class is a thread. it does nothing in this example.
179 print "Warning: pre-alpha prototype. Full of bugs."
180 while not self.shared.stopped():