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():
39 # return random.choice( filter_protocol(DEFAULT_SERVERS,'s') )
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()
53 self.default_server = self.config.get('server')
56 self.protocol = self.config.get('protocol','s')
57 self.irc_servers = [] # returned by interface (list from irc)
58 self.disconnected_servers = []
59 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
63 self.proxy = self.config.get('proxy')
67 dir_path = os.path.join( self.config.path, 'certs')
68 if not os.path.exists(dir_path):
71 # default subscriptions
72 self.subscriptions = {}
73 self.subscriptions[self.on_banner] = [('server.banner',[])]
74 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
77 def is_connected(self):
78 return self.interface and self.interface.is_connected
81 def send_subscriptions(self):
82 for cb, sub in self.subscriptions.items():
83 self.interface.send(sub, cb)
86 def subscribe(self, messages, callback):
88 if self.subscriptions.get(callback) is None:
89 self.subscriptions[callback] = []
90 for message in messages:
91 if message not in self.subscriptions[callback]:
92 self.subscriptions[callback].append(message)
94 if self.interface and self.interface.is_connected:
95 self.interface.send( messages, callback )
98 def register_callback(self, event, callback):
100 if not self.callbacks.get(event):
101 self.callbacks[event] = []
102 self.callbacks[event].append(callback)
105 def trigger_callback(self, event):
107 callbacks = self.callbacks.get(event,[])[:]
109 [callback() for callback in callbacks]
112 def random_server(self):
114 l = filter_protocol(self.get_servers(), self.protocol)
116 if s in self.disconnected_servers or s in self.interfaces.keys():
119 choice_list.append(s)
122 if not self.interfaces:
123 # we are probably offline, retry later
124 self.disconnected_servers = []
127 server = random.choice( choice_list )
131 def get_servers(self):
132 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
133 for s in self.recent_servers:
134 host, port, protocol = s.split(':')
136 out[host] = { protocol:port }
139 def start_interface(self, server):
140 if server in self.interfaces.keys():
142 i = interface.Interface(server, self.config)
143 self.interfaces[server] = i
146 def start_random_interface(self):
147 server = self.random_server()
149 self.start_interface(server)
151 def start_interfaces(self):
152 if self.default_server:
153 self.start_interface(self.default_server)
154 self.interface = self.interfaces[self.default_server]
156 for i in range(NUM_SERVERS):
157 self.start_random_interface()
159 if not self.interface:
160 self.interface = self.interfaces.values()[0]
163 def start(self, wait=False):
164 self.start_interfaces()
165 threading.Thread.start(self)
167 self.interface.connect_event.wait()
168 return self.interface.is_connected
171 def wait_until_connected(self):
172 while not self.interface:
174 self.interface.connect_event.wait()
177 def set_parameters(self, host, port, protocol, proxy, auto_connect):
179 self.config.set_key('auto_cycle', auto_connect, True)
180 self.config.set_key("proxy", proxy, True)
181 self.config.set_key("protocol", protocol, True)
182 server = ':'.join([ host, port, protocol ])
183 self.config.set_key("server", server, True)
185 if self.proxy != proxy or self.protocol != protocol:
187 self.protocol = protocol
188 for i in self.interfaces.values(): i.stop()
190 self.interface = None
191 self.default_server = None
195 if not self.interface:
196 self.switch_to_random_interface()
198 if self.server_lag > 0:
199 self.interface.stop()
201 self.set_server(server)
204 def switch_to_random_interface(self):
206 self.switch_to_interface(random.choice(self.interfaces.values()))
208 def switch_to_interface(self, interface):
209 server = interface.server
210 print_error("switching to", server)
211 self.interface = interface
212 h = self.heights.get(server)
214 self.server_lag = self.blockchain.height - h
215 self.config.set_key('server', server, False)
216 self.default_server = server
217 self.send_subscriptions()
218 self.trigger_callback('connected')
221 def set_server(self, server):
222 if self.default_server == server and self.interface:
225 if self.protocol != server.split(':')[2]:
228 # stop the interface in order to terminate subscriptions
230 self.interface.stop()
233 self.trigger_callback('disconnecting')
235 self.default_server = server
236 self.config.set_key("server", server, True)
238 if server in self.interfaces.keys():
239 self.switch_to_interface( self.interfaces[server] )
241 self.start_interface(server)
242 self.interface = self.interfaces[server]
245 def add_recent_server(self, i):
248 if s in self.recent_servers:
249 self.recent_servers.remove(s)
250 self.recent_servers.insert(0,s)
251 self.recent_servers = self.recent_servers[0:20]
252 self.config.set_key('recent_servers', self.recent_servers)
255 def new_blockchain_height(self, blockchain_height, i):
256 if self.is_connected():
257 h = self.heights.get(self.interface.server)
259 self.server_lag = blockchain_height - h
260 if self.server_lag > 1:
261 print_error( "Server is lagging", blockchain_height, h)
262 if self.config.get('auto_cycle'):
263 self.set_server(i.server)
265 self.trigger_callback('updated')
269 self.blockchain.start()
274 while self.is_running():
276 i = self.queue.get(timeout = 30 if self.interfaces else 3)
278 if len(self.interfaces) < NUM_SERVERS:
279 self.start_random_interface()
283 self.add_recent_server(i)
284 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
285 if i == self.interface:
286 print_error('sending subscriptions to', self.interface.server)
287 self.send_subscriptions()
288 self.trigger_callback('connected')
290 self.disconnected_servers.append(i.server)
291 self.interfaces.pop(i.server)
292 if i.server in self.heights:
293 self.heights.pop(i.server)
294 if i == self.interface:
295 self.interface = None
296 self.trigger_callback('disconnected')
298 if self.interface is None and self.config.get('auto_cycle'):
299 self.switch_to_random_interface()
302 def on_header(self, i, r):
303 result = r.get('result')
304 if not result: return
305 self.heights[i.server] = result.get('block_height')
306 self.blockchain.queue.put((i,result))
308 if i == self.interface:
309 self.server_lag = self.blockchain.height - self.heights[i.server]
310 self.trigger_callback('updated')
313 def on_peers(self, i, r):
315 self.irc_servers = self.parse_servers(r.get('result'))
316 self.trigger_callback('peers')
318 def on_banner(self, i, r):
319 self.banner = r.get('result')
320 self.trigger_callback('banner')
323 with self.lock: self.running = False
325 def is_running(self):
326 with self.lock: return self.running
329 def synchronous_get(self, requests, timeout=100000000):
330 queue = Queue.Queue()
331 ids = self.interface.send(requests, lambda i,r: queue.put(r))
335 r = queue.get(True, timeout)
339 res[_id] = r.get('result')
346 def retrieve_transaction(self, tx_hash, tx_height=0):
348 r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
350 return transaction.Transaction(r)
353 def parse_servers(self, result):
354 """ parse servers list into dict format"""
355 from version import PROTOCOL_VERSION
364 if re.match("[stgh]\d*", v):
365 protocol, port = v[0], v[1:]
366 if port == '': port = DEFAULT_PORTS[protocol]
368 elif re.match("v(.?)+", v):
370 elif re.match("p\d*", v):
371 pruning_level = v[1:]
372 if pruning_level == '': pruning_level = '0'
374 is_recent = float(version)>=float(PROTOCOL_VERSION)
378 if out and is_recent:
379 out['pruning'] = pruning_level
387 if __name__ == "__main__":
389 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
390 network = Network(config)