1 import threading, time, Queue, os, sys, shutil, random
2 from util import user_dir, appdata_dir, print_error, print_msg
5 from blockchain import Blockchain
7 DEFAULT_PORTS = {'t':'50001', 's':'50002', 'h':'8081', 'g':'8082'}
10 'ecdsa.org': DEFAULT_PORTS,
11 'ecdsa.net': DEFAULT_PORTS,
12 'electrum.hachre.de': DEFAULT_PORTS,
13 'electrum.novit.ro': DEFAULT_PORTS,
14 'electrum.coinwallet.me': DEFAULT_PORTS,
15 'cube.l0g.in': DEFAULT_PORTS,
16 'bitcoin.epicinet.net': DEFAULT_PORTS,
17 'h.1209k.com': DEFAULT_PORTS,
18 'electrum.electricnewyear.net': DEFAULT_PORTS,
19 'erbium.sytes.net': DEFAULT_PORTS,
20 'e2.pdmc.net':DEFAULT_PORTS,
21 'electrum.no-ip.org':{'h': '80', 's': '50002', 't': '50001', 'g': '443'},
22 'electrum.thwg.org':DEFAULT_PORTS,
23 'electrum.stepkrav.pw':DEFAULT_PORTS,
27 def parse_servers(result):
28 """ parse servers list into dict format"""
29 from version import PROTOCOL_VERSION
38 if re.match("[stgh]\d*", v):
39 protocol, port = v[0], v[1:]
40 if port == '': port = DEFAULT_PORTS[protocol]
42 elif re.match("v(.?)+", v):
44 elif re.match("p\d*", v):
46 if pruning_level == '': pruning_level = '0'
48 is_recent = float(version)>=float(PROTOCOL_VERSION)
53 out['pruning'] = pruning_level
60 def filter_protocol(servers, p):
62 for k, protocols in servers.items():
64 l.append( ':'.join([k, protocols[p], p]) )
68 def pick_random_server(p='s'):
69 return random.choice( filter_protocol(DEFAULT_SERVERS,p) )
71 from simple_config import SimpleConfig
73 class Network(threading.Thread):
75 def __init__(self, config = {}):
76 threading.Thread.__init__(self)
78 self.config = SimpleConfig(config) if type(config) == type({}) else config
79 self.lock = threading.Lock()
80 self.num_server = 8 if not self.config.get('oneserver') else 0
81 self.blockchain = Blockchain(self.config, self)
83 self.queue = Queue.Queue()
85 self.protocol = self.config.get('protocol','s')
88 # Server for addresses and transactions
89 self.default_server = self.config.get('server')
90 if not self.default_server:
91 self.default_server = pick_random_server(self.protocol)
93 self.irc_servers = [] # returned by interface (list from irc)
94 self.pending_servers = set([])
95 self.disconnected_servers = set([])
96 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
100 self.proxy = self.config.get('proxy')
102 self.merkle_roots = {}
106 dir_path = os.path.join( self.config.path, 'certs')
107 if not os.path.exists(dir_path):
110 # default subscriptions
111 self.subscriptions = {}
112 self.subscriptions[self.on_banner] = [('server.banner',[])]
113 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
114 self.pending_transactions_for_notifications = []
117 def is_connected(self):
118 return self.interface and self.interface.is_connected
121 def is_up_to_date(self):
122 return self.interface.is_up_to_date()
125 def main_server(self):
126 return self.interface.server
129 def send_subscriptions(self):
130 for cb, sub in self.subscriptions.items():
131 self.interface.send(sub, cb)
134 def subscribe(self, messages, callback):
136 if self.subscriptions.get(callback) is None:
137 self.subscriptions[callback] = []
138 for message in messages:
139 if message not in self.subscriptions[callback]:
140 self.subscriptions[callback].append(message)
142 if self.is_connected():
143 self.interface.send( messages, callback )
146 def send(self, messages, callback):
147 if self.is_connected():
148 self.interface.send( messages, callback )
154 def register_callback(self, event, callback):
156 if not self.callbacks.get(event):
157 self.callbacks[event] = []
158 self.callbacks[event].append(callback)
161 def trigger_callback(self, event):
163 callbacks = self.callbacks.get(event,[])[:]
165 [callback() for callback in callbacks]
168 def random_server(self):
170 l = filter_protocol(self.get_servers(), self.protocol)
172 if s in self.pending_servers or s in self.disconnected_servers or s in self.interfaces.keys():
175 choice_list.append(s)
178 if not self.interfaces:
179 # we are probably offline, retry later
180 self.disconnected_servers = set([])
183 server = random.choice( choice_list )
187 def get_servers(self):
189 out = self.irc_servers
191 out = DEFAULT_SERVERS
192 for s in self.recent_servers:
193 host, port, protocol = s.split(':')
195 out[host] = { protocol:port }
198 def start_interface(self, server):
199 if server in self.interfaces.keys():
201 i = interface.Interface(server, self.config)
202 self.pending_servers.add(server)
206 def start_random_interface(self):
207 server = self.random_server()
209 self.start_interface(server)
211 def start_interfaces(self):
212 self.interface = self.start_interface(self.default_server)
214 for i in range(self.num_server):
215 self.start_random_interface()
218 def start(self, wait=False):
219 self.start_interfaces()
220 threading.Thread.start(self)
222 return self.wait_until_connected()
224 def wait_until_connected(self):
225 "wait until connection status is known"
226 if self.config.get('auto_cycle'):
227 # self.random_server() returns None if all servers have been tried
228 while not self.is_connected() and self.random_server():
231 self.interface.connect_event.wait()
233 return self.interface.is_connected
236 def set_parameters(self, host, port, protocol, proxy, auto_connect):
238 self.config.set_key('auto_cycle', auto_connect, True)
239 self.config.set_key("proxy", proxy, True)
240 self.config.set_key("protocol", protocol, True)
241 server = ':'.join([ host, port, protocol ])
242 self.config.set_key("server", server, True)
244 if self.proxy != proxy or self.protocol != protocol:
246 self.protocol = protocol
247 for i in self.interfaces.values(): i.stop()
249 #self.interface = None
253 if not self.interface.is_connected:
254 self.switch_to_random_interface()
256 if self.server_lag > 0:
257 self.stop_interface()
259 self.set_server(server)
262 def switch_to_random_interface(self):
264 self.switch_to_interface(random.choice(self.interfaces.values()))
266 def switch_to_interface(self, interface):
267 assert not self.interface.is_connected
268 server = interface.server
269 print_error("switching to", server)
270 self.interface = interface
271 h = self.heights.get(server)
273 self.server_lag = self.blockchain.height() - h
274 self.config.set_key('server', server, False)
275 self.default_server = server
276 self.send_subscriptions()
277 self.trigger_callback('connected')
280 def stop_interface(self):
281 self.interface.stop()
284 def set_server(self, server):
285 if self.default_server == server and self.interface.is_connected:
288 if self.protocol != server.split(':')[2]:
291 # stop the interface in order to terminate subscriptions
292 if self.interface.is_connected:
293 self.stop_interface()
296 self.trigger_callback('disconnecting')
298 self.default_server = server
299 self.config.set_key("server", server, True)
301 if server in self.interfaces.keys():
302 self.switch_to_interface( self.interfaces[server] )
304 self.interface = self.start_interface(server)
307 def add_recent_server(self, i):
310 if s in self.recent_servers:
311 self.recent_servers.remove(s)
312 self.recent_servers.insert(0,s)
313 self.recent_servers = self.recent_servers[0:20]
314 self.config.set_key('recent_servers', self.recent_servers)
317 def new_blockchain_height(self, blockchain_height, i):
318 if self.is_connected():
319 h = self.heights.get(self.interface.server)
321 self.server_lag = blockchain_height - h
322 if self.server_lag > 1:
323 print_error( "Server is lagging", blockchain_height, h)
324 if self.config.get('auto_cycle'):
325 self.set_server(i.server)
327 print_error('no height for main interface')
329 self.trigger_callback('updated')
333 self.blockchain.start()
338 while self.is_running():
340 i = self.queue.get(timeout = 30 if self.interfaces else 3)
342 if len(self.interfaces) < self.num_server:
343 self.start_random_interface()
346 if i.server in self.pending_servers:
347 self.pending_servers.remove(i.server)
350 #if i.server in self.interfaces: raise
351 self.interfaces[i.server] = i
352 self.add_recent_server(i)
353 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
354 if i == self.interface:
355 print_error('sending subscriptions to', self.interface.server)
356 self.send_subscriptions()
357 self.trigger_callback('connected')
359 self.disconnected_servers.add(i.server)
360 if i.server in self.interfaces:
361 self.interfaces.pop(i.server)
362 if i.server in self.heights:
363 self.heights.pop(i.server)
364 if i == self.interface:
365 #self.interface = None
366 self.trigger_callback('disconnected')
368 if not self.interface.is_connected and self.config.get('auto_cycle'):
369 self.switch_to_random_interface()
372 def on_header(self, i, r):
373 result = r.get('result')
376 height = result.get('block_height')
379 self.heights[i.server] = height
380 self.merkle_roots[i.server] = result.get('merkle_root')
381 self.utxo_roots[i.server] = result.get('utxo_root')
382 # notify blockchain about the new height
383 self.blockchain.queue.put((i,result))
385 if i == self.interface:
386 self.server_lag = self.blockchain.height() - height
387 if self.server_lag > 1 and self.config.get('auto_cycle'):
388 print_error( "Server lagging, stopping interface")
389 self.stop_interface()
391 self.trigger_callback('updated')
394 def on_peers(self, i, r):
396 self.irc_servers = parse_servers(r.get('result'))
397 self.trigger_callback('peers')
399 def on_banner(self, i, r):
400 self.banner = r.get('result')
401 self.trigger_callback('banner')
404 with self.lock: self.running = False
406 def is_running(self):
407 with self.lock: return self.running
410 def synchronous_get(self, requests, timeout=100000000):
411 return self.interface.synchronous_get(requests)
414 def get_header(self, tx_height):
415 return self.blockchain.read_header(tx_height)
417 def get_local_height(self):
418 return self.blockchain.height()
422 #def retrieve_transaction(self, tx_hash, tx_height=0):
424 # r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
426 # return transaction.Transaction(r)
432 if __name__ == "__main__":
433 network = NetworkProxy({})
435 print network.get_servers()
438 network.send([('blockchain.headers.subscribe',[])], q.put)
440 r = q.get(timeout=10000)