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 #'electrum.coinwallet.me': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
11 'electrum.hachre.de': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
12 'electrum.novit.ro': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
13 'electrum.stepkrav.pw': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
14 #'ecdsa.org': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
15 'electrum.no-ip.org': {'h': '80', 's': '50002', 't': '50001', 'g': '443'},
16 'electrum.drollette.com': {'h': '5000', 's': '50002', 't': '50001', 'g': '8082'},
17 'btc.it-zone.org': {'h': '80', 's': '110', 't': '50001', 'g': '443'},
18 'btc.medoix.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
19 'electrum.stupidfoot.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
20 #'electrum.pdmc.net': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
21 'electrum.be': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'}
27 def filter_protocol(servers, p):
29 for k, protocols in servers.items():
31 l.append( ':'.join([k, protocols[p], p]) )
35 def pick_random_server(p='s'):
36 return random.choice( filter_protocol(DEFAULT_SERVERS,p) )
38 from simple_config import SimpleConfig
40 class Network(threading.Thread):
42 def __init__(self, config = {}):
43 threading.Thread.__init__(self)
45 self.config = SimpleConfig(config) if type(config) == type({}) else config
46 self.lock = threading.Lock()
47 self.num_server = 8 if not self.config.get('oneserver') else 0
48 self.blockchain = Blockchain(self.config, self)
50 self.queue = Queue.Queue()
52 self.protocol = self.config.get('protocol','s')
54 # Server for addresses and transactions
55 self.default_server = self.config.get('server')
56 if not self.default_server:
57 self.default_server = pick_random_server(self.protocol)
59 self.irc_servers = [] # returned by interface (list from irc)
60 self.disconnected_servers = []
61 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
65 self.proxy = self.config.get('proxy')
69 dir_path = os.path.join( self.config.path, 'certs')
70 if not os.path.exists(dir_path):
73 # default subscriptions
74 self.subscriptions = {}
75 self.subscriptions[self.on_banner] = [('server.banner',[])]
76 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
79 def is_connected(self):
80 return self.interface and self.interface.is_connected
83 def send_subscriptions(self):
84 for cb, sub in self.subscriptions.items():
85 self.interface.send(sub, cb)
88 def subscribe(self, messages, callback):
90 if self.subscriptions.get(callback) is None:
91 self.subscriptions[callback] = []
92 for message in messages:
93 if message not in self.subscriptions[callback]:
94 self.subscriptions[callback].append(message)
96 if self.interface and self.interface.is_connected:
97 self.interface.send( messages, callback )
100 def send(self, messages, callback):
101 if self.interface and self.interface.is_connected:
102 self.interface.send( messages, callback )
108 def register_callback(self, event, callback):
110 if not self.callbacks.get(event):
111 self.callbacks[event] = []
112 self.callbacks[event].append(callback)
115 def trigger_callback(self, event):
117 callbacks = self.callbacks.get(event,[])[:]
119 [callback() for callback in callbacks]
122 def random_server(self):
124 l = filter_protocol(self.get_servers(), self.protocol)
126 if s in self.disconnected_servers or s in self.interfaces.keys():
129 choice_list.append(s)
132 if not self.interfaces:
133 # we are probably offline, retry later
134 self.disconnected_servers = []
137 server = random.choice( choice_list )
141 def get_servers(self):
142 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
143 for s in self.recent_servers:
144 host, port, protocol = s.split(':')
146 out[host] = { protocol:port }
149 def start_interface(self, server):
150 if server in self.interfaces.keys():
152 i = interface.Interface(server, self.config)
153 self.interfaces[server] = i
156 def start_random_interface(self):
157 server = self.random_server()
159 self.start_interface(server)
161 def start_interfaces(self):
162 self.start_interface(self.default_server)
163 self.interface = self.interfaces[self.default_server]
165 for i in range(self.num_server):
166 self.start_random_interface()
168 if not self.interface:
169 self.interface = self.interfaces.values()[0]
172 def start(self, wait=False):
173 self.start_interfaces()
174 threading.Thread.start(self)
176 self.interface.connect_event.wait()
177 return self.interface.is_connected
180 def wait_until_connected(self):
181 while not self.interface:
183 self.interface.connect_event.wait()
186 def set_parameters(self, host, port, protocol, proxy, auto_connect):
188 self.config.set_key('auto_cycle', auto_connect, True)
189 self.config.set_key("proxy", proxy, True)
190 self.config.set_key("protocol", protocol, True)
191 server = ':'.join([ host, port, protocol ])
192 self.config.set_key("server", server, True)
194 if self.proxy != proxy or self.protocol != protocol:
196 self.protocol = protocol
197 for i in self.interfaces.values(): i.stop()
199 self.interface = None
203 if not self.interface:
204 self.switch_to_random_interface()
206 if self.server_lag > 0:
207 self.stop_interface()
209 self.set_server(server)
212 def switch_to_random_interface(self):
214 self.switch_to_interface(random.choice(self.interfaces.values()))
216 def switch_to_interface(self, interface):
217 assert self.interface is None
218 server = interface.server
219 print_error("switching to", server)
220 self.interface = interface
221 h = self.heights.get(server)
223 self.server_lag = self.blockchain.height() - h
224 self.config.set_key('server', server, False)
225 self.default_server = server
226 self.send_subscriptions()
227 self.trigger_callback('connected')
230 def stop_interface(self):
231 self.interface.stop()
232 self.interface = None
234 def set_server(self, server):
235 if self.default_server == server and self.interface:
238 if self.protocol != server.split(':')[2]:
241 # stop the interface in order to terminate subscriptions
243 self.stop_interface()
246 self.trigger_callback('disconnecting')
248 self.default_server = server
249 self.config.set_key("server", server, True)
251 if server in self.interfaces.keys():
252 self.switch_to_interface( self.interfaces[server] )
254 self.start_interface(server)
255 self.interface = self.interfaces[server]
258 def add_recent_server(self, i):
261 if s in self.recent_servers:
262 self.recent_servers.remove(s)
263 self.recent_servers.insert(0,s)
264 self.recent_servers = self.recent_servers[0:20]
265 self.config.set_key('recent_servers', self.recent_servers)
268 def new_blockchain_height(self, blockchain_height, i):
269 if self.is_connected():
270 h = self.heights.get(self.interface.server)
272 self.server_lag = blockchain_height - h
273 if self.server_lag > 1:
274 print_error( "Server is lagging", blockchain_height, h)
275 if self.config.get('auto_cycle'):
276 self.set_server(i.server)
278 print_error('no height for main interface')
280 self.trigger_callback('updated')
284 self.blockchain.start()
289 while self.is_running():
291 i = self.queue.get(timeout = 30 if self.interfaces else 3)
293 if len(self.interfaces) < self.num_server:
294 self.start_random_interface()
298 self.add_recent_server(i)
299 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
300 if i == self.interface:
301 print_error('sending subscriptions to', self.interface.server)
302 self.send_subscriptions()
303 self.trigger_callback('connected')
305 self.disconnected_servers.append(i.server)
306 self.interfaces.pop(i.server)
307 if i.server in self.heights:
308 self.heights.pop(i.server)
309 if i == self.interface:
310 self.interface = None
311 self.trigger_callback('disconnected')
313 if self.interface is None and self.config.get('auto_cycle'):
314 self.switch_to_random_interface()
317 def on_header(self, i, r):
318 result = r.get('result')
319 if not result: return
320 height = result.get('block_height')
321 self.heights[i.server] = height
322 # notify blockchain about the new height
323 self.blockchain.queue.put((i,result))
325 if i == self.interface:
326 self.server_lag = self.blockchain.height() - height
327 if self.server_lag > 1 and self.config.get('auto_cycle'):
328 print_error( "Server lagging, stopping interface")
329 self.stop_interface()
331 self.trigger_callback('updated')
334 def on_peers(self, i, r):
336 self.irc_servers = self.parse_servers(r.get('result'))
337 self.trigger_callback('peers')
339 def on_banner(self, i, r):
340 self.banner = r.get('result')
341 self.trigger_callback('banner')
344 with self.lock: self.running = False
346 def is_running(self):
347 with self.lock: return self.running
350 def synchronous_get(self, requests, timeout=100000000):
351 queue = Queue.Queue()
352 ids = self.interface.send(requests, lambda i,r: queue.put(r))
356 r = queue.get(True, timeout)
360 res[_id] = r.get('result')
367 def retrieve_transaction(self, tx_hash, tx_height=0):
369 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
371 return transaction.Transaction(r)
374 def parse_servers(self, result):
375 """ parse servers list into dict format"""
376 from version import PROTOCOL_VERSION
385 if re.match("[stgh]\d*", v):
386 protocol, port = v[0], v[1:]
387 if port == '': port = DEFAULT_PORTS[protocol]
389 elif re.match("v(.?)+", v):
391 elif re.match("p\d*", v):
392 pruning_level = v[1:]
393 if pruning_level == '': pruning_level = '0'
395 is_recent = float(version)>=float(PROTOCOL_VERSION)
399 if out and is_recent:
400 out['pruning'] = pruning_level
408 if __name__ == "__main__":
410 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
411 network = Network(config)