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=None):
77 config = {} # Do not use mutables as default values!
78 threading.Thread.__init__(self)
80 self.config = SimpleConfig(config) if type(config) == type({}) else config
81 self.lock = threading.Lock()
82 self.num_server = 8 if not self.config.get('oneserver') else 0
83 self.blockchain = Blockchain(self.config, self)
85 self.queue = Queue.Queue()
87 self.protocol = self.config.get('protocol','s')
90 # Server for addresses and transactions
91 self.default_server = self.config.get('server')
92 if not self.default_server:
93 self.default_server = pick_random_server(self.protocol)
95 self.irc_servers = [] # returned by interface (list from irc)
96 self.pending_servers = set([])
97 self.disconnected_servers = set([])
98 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
101 self.interface = None
102 self.proxy = self.config.get('proxy')
104 self.merkle_roots = {}
108 dir_path = os.path.join( self.config.path, 'certs')
109 if not os.path.exists(dir_path):
112 # default subscriptions
113 self.subscriptions = {}
114 self.subscriptions[self.on_banner] = [('server.banner',[])]
115 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
116 self.pending_transactions_for_notifications = []
119 def is_connected(self):
120 return self.interface and self.interface.is_connected
123 def is_up_to_date(self):
124 return self.interface.is_up_to_date()
127 def main_server(self):
128 return self.interface.server
131 def send_subscriptions(self):
132 for cb, sub in self.subscriptions.items():
133 self.interface.send(sub, cb)
136 def subscribe(self, messages, callback):
138 if self.subscriptions.get(callback) is None:
139 self.subscriptions[callback] = []
140 for message in messages:
141 if message not in self.subscriptions[callback]:
142 self.subscriptions[callback].append(message)
144 if self.is_connected():
145 self.interface.send( messages, callback )
148 def send(self, messages, callback):
149 if self.is_connected():
150 self.interface.send( messages, callback )
156 def register_callback(self, event, callback):
158 if not self.callbacks.get(event):
159 self.callbacks[event] = []
160 self.callbacks[event].append(callback)
163 def trigger_callback(self, event):
165 callbacks = self.callbacks.get(event,[])[:]
167 [callback() for callback in callbacks]
170 def random_server(self):
172 l = filter_protocol(self.get_servers(), self.protocol)
174 if s in self.pending_servers or s in self.disconnected_servers or s in self.interfaces.keys():
177 choice_list.append(s)
180 if not self.interfaces:
181 # we are probably offline, retry later
182 self.disconnected_servers = set([])
185 server = random.choice( choice_list )
189 def get_servers(self):
191 out = self.irc_servers
193 out = DEFAULT_SERVERS
194 for s in self.recent_servers:
195 host, port, protocol = s.split(':')
197 out[host] = { protocol:port }
200 def start_interface(self, server):
201 if server in self.interfaces.keys():
203 i = interface.Interface(server, self.config)
204 self.pending_servers.add(server)
208 def start_random_interface(self):
209 server = self.random_server()
211 self.start_interface(server)
213 def start_interfaces(self):
214 self.interface = self.start_interface(self.default_server)
216 for i in range(self.num_server):
217 self.start_random_interface()
220 def start(self, wait=False):
221 self.start_interfaces()
222 threading.Thread.start(self)
224 return self.wait_until_connected()
226 def wait_until_connected(self):
227 "wait until connection status is known"
228 if self.config.get('auto_cycle'):
229 # self.random_server() returns None if all servers have been tried
230 while not self.is_connected() and self.random_server():
233 self.interface.connect_event.wait()
235 return self.interface.is_connected
238 def set_parameters(self, host, port, protocol, proxy, auto_connect):
240 self.config.set_key('auto_cycle', auto_connect, True)
241 self.config.set_key("proxy", proxy, True)
242 self.config.set_key("protocol", protocol, True)
243 server = ':'.join([ host, port, protocol ])
244 self.config.set_key("server", server, True)
246 if self.proxy != proxy or self.protocol != protocol:
248 self.protocol = protocol
249 for i in self.interfaces.values(): i.stop()
251 #self.interface = None
255 if not self.interface.is_connected:
256 self.switch_to_random_interface()
258 if self.server_lag > 0:
259 self.stop_interface()
261 self.set_server(server)
264 def switch_to_random_interface(self):
266 self.switch_to_interface(random.choice(self.interfaces.values()))
268 def switch_to_interface(self, interface):
269 assert not self.interface.is_connected
270 server = interface.server
271 print_error("switching to", server)
272 self.interface = interface
273 h = self.heights.get(server)
275 self.server_lag = self.blockchain.height() - h
276 self.config.set_key('server', server, False)
277 self.default_server = server
278 self.send_subscriptions()
279 self.trigger_callback('connected')
282 def stop_interface(self):
283 self.interface.stop()
286 def set_server(self, server):
287 if self.default_server == server and self.interface.is_connected:
290 if self.protocol != server.split(':')[2]:
293 # stop the interface in order to terminate subscriptions
294 if self.interface.is_connected:
295 self.stop_interface()
298 self.trigger_callback('disconnecting')
300 self.default_server = server
301 self.config.set_key("server", server, True)
303 if server in self.interfaces.keys():
304 self.switch_to_interface( self.interfaces[server] )
306 self.interface = self.start_interface(server)
309 def add_recent_server(self, i):
312 if s in self.recent_servers:
313 self.recent_servers.remove(s)
314 self.recent_servers.insert(0,s)
315 self.recent_servers = self.recent_servers[0:20]
316 self.config.set_key('recent_servers', self.recent_servers)
319 def new_blockchain_height(self, blockchain_height, i):
320 if self.is_connected():
321 h = self.heights.get(self.interface.server)
323 self.server_lag = blockchain_height - h
324 if self.server_lag > 1:
325 print_error( "Server is lagging", blockchain_height, h)
326 if self.config.get('auto_cycle'):
327 self.set_server(i.server)
329 print_error('no height for main interface')
331 self.trigger_callback('updated')
335 self.blockchain.start()
340 while self.is_running():
342 i = self.queue.get(timeout = 30 if self.interfaces else 3)
344 if len(self.interfaces) < self.num_server:
345 self.start_random_interface()
348 if i.server in self.pending_servers:
349 self.pending_servers.remove(i.server)
352 #if i.server in self.interfaces: raise
353 self.interfaces[i.server] = i
354 self.add_recent_server(i)
355 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
356 if i == self.interface:
357 print_error('sending subscriptions to', self.interface.server)
358 self.send_subscriptions()
359 self.trigger_callback('connected')
361 self.disconnected_servers.add(i.server)
362 if i.server in self.interfaces:
363 self.interfaces.pop(i.server)
364 if i.server in self.heights:
365 self.heights.pop(i.server)
366 if i == self.interface:
367 #self.interface = None
368 self.trigger_callback('disconnected')
370 if not self.interface.is_connected and self.config.get('auto_cycle'):
371 self.switch_to_random_interface()
374 def on_header(self, i, r):
375 result = r.get('result')
378 height = result.get('block_height')
381 self.heights[i.server] = height
382 self.merkle_roots[i.server] = result.get('merkle_root')
383 self.utxo_roots[i.server] = result.get('utxo_root')
384 # notify blockchain about the new height
385 self.blockchain.queue.put((i,result))
387 if i == self.interface:
388 self.server_lag = self.blockchain.height() - height
389 if self.server_lag > 1 and self.config.get('auto_cycle'):
390 print_error( "Server lagging, stopping interface")
391 self.stop_interface()
393 self.trigger_callback('updated')
396 def on_peers(self, i, r):
398 self.irc_servers = parse_servers(r.get('result'))
399 self.trigger_callback('peers')
401 def on_banner(self, i, r):
402 self.banner = r.get('result')
403 self.trigger_callback('banner')
406 with self.lock: self.running = False
408 def is_running(self):
409 with self.lock: return self.running
412 def synchronous_get(self, requests, timeout=100000000):
413 return self.interface.synchronous_get(requests)
416 def get_header(self, tx_height):
417 return self.blockchain.read_header(tx_height)
419 def get_local_height(self):
420 return self.blockchain.height()
424 #def retrieve_transaction(self, tx_hash, tx_height=0):
426 # r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
428 # return transaction.Transaction(r)
434 if __name__ == "__main__":
435 network = NetworkProxy({})
437 print network.get_servers()
440 network.send([('blockchain.headers.subscribe',[])], q.put)
442 r = q.get(timeout=10000)