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 #'the9ull.homelinux.org': {'h': '8082', 't': '50001'},
11 'electrum.coinwallet.me': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
12 'electrum.hachre.de': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
13 #'electrum.koh.ms': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
14 'electrum.novit.ro': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
15 'electrum.stepkrav.pw': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
16 #'ecdsa.org': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
17 #'electrum.mooo.com': {'h': '8081', 't': '50001'},
18 #'electrum.bitcoins.sk': {'h': '8081', 's': '50002', 't': '50001', 'g': '8'},
19 'electrum.no-ip.org': {'h': '80', 's': '50002', 't': '50001', 'g': '443'},
20 'electrum.drollette.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
21 'btc.it-zone.org': {'h': '80', 's': '110', 't': '50001', 'g': '443'},
22 #'electrum.yacoin.com': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'},
23 'electrum.be': {'h': '8081', 's': '50002', 't': '50001', 'g': '8082'}
30 def filter_protocol(servers, p):
32 for k, protocols in servers.items():
34 l.append( ':'.join([k, protocols[p], p]) )
38 def pick_random_server(p='s'):
39 return random.choice( filter_protocol(DEFAULT_SERVERS,p) )
41 from simple_config import SimpleConfig
43 class Network(threading.Thread):
45 def __init__(self, config = {}):
46 threading.Thread.__init__(self)
48 self.config = SimpleConfig(config) if type(config) == type({}) else config
49 self.lock = threading.Lock()
50 self.blockchain = Blockchain(self.config, self)
52 self.queue = Queue.Queue()
54 self.protocol = self.config.get('protocol','s')
56 # Server for addresses and transactions
57 self.default_server = self.config.get('server')
58 if not self.default_server:
59 self.default_server = pick_random_server(self.protocol)
61 self.irc_servers = [] # returned by interface (list from irc)
62 self.disconnected_servers = []
63 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
67 self.proxy = self.config.get('proxy')
71 dir_path = os.path.join( self.config.path, 'certs')
72 if not os.path.exists(dir_path):
75 # default subscriptions
76 self.subscriptions = {}
77 self.subscriptions[self.on_banner] = [('server.banner',[])]
78 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
81 def is_connected(self):
82 return self.interface and self.interface.is_connected
85 def send_subscriptions(self):
86 for cb, sub in self.subscriptions.items():
87 self.interface.send(sub, cb)
90 def subscribe(self, messages, callback):
92 if self.subscriptions.get(callback) is None:
93 self.subscriptions[callback] = []
94 for message in messages:
95 if message not in self.subscriptions[callback]:
96 self.subscriptions[callback].append(message)
98 if self.interface and self.interface.is_connected:
99 self.interface.send( messages, callback )
102 def register_callback(self, event, callback):
104 if not self.callbacks.get(event):
105 self.callbacks[event] = []
106 self.callbacks[event].append(callback)
109 def trigger_callback(self, event):
111 callbacks = self.callbacks.get(event,[])[:]
113 [callback() for callback in callbacks]
116 def random_server(self):
118 l = filter_protocol(self.get_servers(), self.protocol)
120 if s in self.disconnected_servers or s in self.interfaces.keys():
123 choice_list.append(s)
126 if not self.interfaces:
127 # we are probably offline, retry later
128 self.disconnected_servers = []
131 server = random.choice( choice_list )
135 def get_servers(self):
136 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
137 for s in self.recent_servers:
138 host, port, protocol = s.split(':')
140 out[host] = { protocol:port }
143 def start_interface(self, server):
144 if server in self.interfaces.keys():
146 i = interface.Interface(server, self.config)
147 self.interfaces[server] = i
150 def start_random_interface(self):
151 server = self.random_server()
153 self.start_interface(server)
155 def start_interfaces(self):
156 self.start_interface(self.default_server)
157 self.interface = self.interfaces[self.default_server]
159 for i in range(NUM_SERVERS):
160 self.start_random_interface()
162 if not self.interface:
163 self.interface = self.interfaces.values()[0]
166 def start(self, wait=False):
167 self.start_interfaces()
168 threading.Thread.start(self)
170 self.interface.connect_event.wait()
171 return self.interface.is_connected
174 def wait_until_connected(self):
175 while not self.interface:
177 self.interface.connect_event.wait()
180 def set_parameters(self, host, port, protocol, proxy, auto_connect):
182 self.config.set_key('auto_cycle', auto_connect, True)
183 self.config.set_key("proxy", proxy, True)
184 self.config.set_key("protocol", protocol, True)
185 server = ':'.join([ host, port, protocol ])
186 self.config.set_key("server", server, True)
188 if self.proxy != proxy or self.protocol != protocol:
190 self.protocol = protocol
191 for i in self.interfaces.values(): i.stop()
193 self.interface = None
197 if not self.interface:
198 self.switch_to_random_interface()
200 if self.server_lag > 0:
201 self.stop_interface()
203 self.set_server(server)
206 def switch_to_random_interface(self):
208 self.switch_to_interface(random.choice(self.interfaces.values()))
210 def switch_to_interface(self, interface):
211 assert self.interface is None
212 server = interface.server
213 print_error("switching to", server)
214 self.interface = interface
215 h = self.heights.get(server)
217 self.server_lag = self.blockchain.height() - h
218 self.config.set_key('server', server, False)
219 self.default_server = server
220 self.send_subscriptions()
221 self.trigger_callback('connected')
224 def stop_interface(self):
225 self.interface.stop()
226 self.interface = None
228 def set_server(self, server):
229 if self.default_server == server and self.interface:
232 if self.protocol != server.split(':')[2]:
235 # stop the interface in order to terminate subscriptions
237 self.stop_interface()
240 self.trigger_callback('disconnecting')
242 self.default_server = server
243 self.config.set_key("server", server, True)
245 if server in self.interfaces.keys():
246 self.switch_to_interface( self.interfaces[server] )
248 self.start_interface(server)
249 self.interface = self.interfaces[server]
252 def add_recent_server(self, i):
255 if s in self.recent_servers:
256 self.recent_servers.remove(s)
257 self.recent_servers.insert(0,s)
258 self.recent_servers = self.recent_servers[0:20]
259 self.config.set_key('recent_servers', self.recent_servers)
262 def new_blockchain_height(self, blockchain_height, i):
263 print_error('new_blockchain_height')
264 if self.is_connected():
265 h = self.heights.get(self.interface.server)
267 self.server_lag = blockchain_height - h
268 if self.server_lag > 1:
269 print_error( "Server is lagging", blockchain_height, h)
270 if self.config.get('auto_cycle'):
271 self.set_server(i.server)
273 print_error('no height for main interface')
275 self.trigger_callback('updated')
279 self.blockchain.start()
284 while self.is_running():
286 i = self.queue.get(timeout = 30 if self.interfaces else 3)
288 if len(self.interfaces) < NUM_SERVERS:
289 self.start_random_interface()
293 self.add_recent_server(i)
294 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
295 if i == self.interface:
296 print_error('sending subscriptions to', self.interface.server)
297 self.send_subscriptions()
298 self.trigger_callback('connected')
300 self.disconnected_servers.append(i.server)
301 self.interfaces.pop(i.server)
302 if i.server in self.heights:
303 self.heights.pop(i.server)
304 if i == self.interface:
305 self.interface = None
306 self.trigger_callback('disconnected')
308 if self.interface is None and self.config.get('auto_cycle'):
309 self.switch_to_random_interface()
312 def on_header(self, i, r):
313 result = r.get('result')
314 if not result: return
315 height = result.get('block_height')
316 self.heights[i.server] = height
317 # notify blockchain about the new height
318 self.blockchain.queue.put((i,result))
320 if i == self.interface:
321 self.server_lag = self.blockchain.height() - height
322 if self.server_lag > 1 and self.config.get('auto_cycle'):
323 print_error( "Server lagging, stopping interface")
324 self.stop_interface()
326 self.trigger_callback('updated')
329 def on_peers(self, i, r):
331 self.irc_servers = self.parse_servers(r.get('result'))
332 self.trigger_callback('peers')
334 def on_banner(self, i, r):
335 self.banner = r.get('result')
336 self.trigger_callback('banner')
339 with self.lock: self.running = False
341 def is_running(self):
342 with self.lock: return self.running
345 def synchronous_get(self, requests, timeout=100000000):
346 queue = Queue.Queue()
347 ids = self.interface.send(requests, lambda i,r: queue.put(r))
351 r = queue.get(True, timeout)
355 res[_id] = r.get('result')
362 def retrieve_transaction(self, tx_hash, tx_height=0):
364 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
366 return transaction.Transaction(r)
369 def parse_servers(self, result):
370 """ parse servers list into dict format"""
371 from version import PROTOCOL_VERSION
380 if re.match("[stgh]\d*", v):
381 protocol, port = v[0], v[1:]
382 if port == '': port = DEFAULT_PORTS[protocol]
384 elif re.match("v(.?)+", v):
386 elif re.match("p\d*", v):
387 pruning_level = v[1:]
388 if pruning_level == '': pruning_level = '0'
390 is_recent = float(version)>=float(PROTOCOL_VERSION)
394 if out and is_recent:
395 out['pruning'] = pruning_level
403 if __name__ == "__main__":
405 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
406 network = Network(config)