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 'electrum.random.re': {'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')
55 # Server for addresses and transactions
56 self.default_server = self.config.get('server')
57 if not self.default_server:
58 self.default_server = pick_random_server(self.protocol)
60 self.irc_servers = [] # returned by interface (list from irc)
61 self.pending_servers = set([])
62 self.disconnected_servers = set([])
63 self.recent_servers = self.config.get('recent_servers',[]) # successful connections
67 self.proxy = self.config.get('proxy')
69 self.merkle_roots = {}
73 dir_path = os.path.join( self.config.path, 'certs')
74 if not os.path.exists(dir_path):
77 # default subscriptions
78 self.subscriptions = {}
79 self.subscriptions[self.on_banner] = [('server.banner',[])]
80 self.subscriptions[self.on_peers] = [('server.peers.subscribe',[])]
83 def is_connected(self):
84 return self.interface and self.interface.is_connected
87 def is_up_to_date(self):
88 return self.interface.is_up_to_date()
91 def main_server(self):
92 return self.interface.server
95 def send_subscriptions(self):
96 for cb, sub in self.subscriptions.items():
97 self.interface.send(sub, cb)
100 def subscribe(self, messages, callback):
102 if self.subscriptions.get(callback) is None:
103 self.subscriptions[callback] = []
104 for message in messages:
105 if message not in self.subscriptions[callback]:
106 self.subscriptions[callback].append(message)
108 if self.is_connected():
109 self.interface.send( messages, callback )
112 def send(self, messages, callback):
113 if self.is_connected():
114 self.interface.send( messages, callback )
120 def register_callback(self, event, callback):
122 if not self.callbacks.get(event):
123 self.callbacks[event] = []
124 self.callbacks[event].append(callback)
127 def trigger_callback(self, event):
129 callbacks = self.callbacks.get(event,[])[:]
131 [callback() for callback in callbacks]
134 def random_server(self):
136 l = filter_protocol(self.get_servers(), self.protocol)
138 if s in self.pending_servers or s in self.disconnected_servers or s in self.interfaces.keys():
141 choice_list.append(s)
144 if not self.interfaces:
145 # we are probably offline, retry later
146 self.disconnected_servers = set([])
149 server = random.choice( choice_list )
153 def get_servers(self):
154 out = self.irc_servers if self.irc_servers else DEFAULT_SERVERS
155 for s in self.recent_servers:
156 host, port, protocol = s.split(':')
158 out[host] = { protocol:port }
161 def start_interface(self, server):
162 if server in self.interfaces.keys():
164 i = interface.Interface(server, self.config)
165 self.pending_servers.add(server)
169 def start_random_interface(self):
170 server = self.random_server()
172 self.start_interface(server)
174 def start_interfaces(self):
175 self.interface = self.start_interface(self.default_server)
177 for i in range(self.num_server):
178 self.start_random_interface()
181 def start(self, wait=False):
182 self.start_interfaces()
183 threading.Thread.start(self)
185 return self.wait_until_connected()
187 def wait_until_connected(self):
188 "wait until connection status is known"
189 if self.config.get('auto_cycle'):
190 # self.random_server() returns None if all servers have been tried
191 while not self.is_connected() and self.random_server():
194 self.interface.connect_event.wait()
196 return self.interface.is_connected
199 def set_parameters(self, host, port, protocol, proxy, auto_connect):
201 self.config.set_key('auto_cycle', auto_connect, True)
202 self.config.set_key("proxy", proxy, True)
203 self.config.set_key("protocol", protocol, True)
204 server = ':'.join([ host, port, protocol ])
205 self.config.set_key("server", server, True)
207 if self.proxy != proxy or self.protocol != protocol:
209 self.protocol = protocol
210 for i in self.interfaces.values(): i.stop()
212 #self.interface = None
216 if not self.interface.is_connected:
217 self.switch_to_random_interface()
219 if self.server_lag > 0:
220 self.stop_interface()
222 self.set_server(server)
225 def switch_to_random_interface(self):
227 self.switch_to_interface(random.choice(self.interfaces.values()))
229 def switch_to_interface(self, interface):
230 assert not self.interface.is_connected
231 server = interface.server
232 print_error("switching to", server)
233 self.interface = interface
234 h = self.heights.get(server)
236 self.server_lag = self.blockchain.height() - h
237 self.config.set_key('server', server, False)
238 self.default_server = server
239 self.send_subscriptions()
240 self.trigger_callback('connected')
243 def stop_interface(self):
244 self.interface.stop()
247 def set_server(self, server):
248 if self.default_server == server and self.interface.is_connected:
251 if self.protocol != server.split(':')[2]:
254 # stop the interface in order to terminate subscriptions
255 if self.interface.is_connected:
256 self.stop_interface()
259 self.trigger_callback('disconnecting')
261 self.default_server = server
262 self.config.set_key("server", server, True)
264 if server in self.interfaces.keys():
265 self.switch_to_interface( self.interfaces[server] )
267 self.interface = self.start_interface(server)
270 def add_recent_server(self, i):
273 if s in self.recent_servers:
274 self.recent_servers.remove(s)
275 self.recent_servers.insert(0,s)
276 self.recent_servers = self.recent_servers[0:20]
277 self.config.set_key('recent_servers', self.recent_servers)
280 def new_blockchain_height(self, blockchain_height, i):
281 if self.is_connected():
282 h = self.heights.get(self.interface.server)
284 self.server_lag = blockchain_height - h
285 if self.server_lag > 1:
286 print_error( "Server is lagging", blockchain_height, h)
287 if self.config.get('auto_cycle'):
288 self.set_server(i.server)
290 print_error('no height for main interface')
292 self.trigger_callback('updated')
296 self.blockchain.start()
301 while self.is_running():
303 i = self.queue.get(timeout = 30 if self.interfaces else 3)
305 if len(self.interfaces) < self.num_server:
306 self.start_random_interface()
309 if i.server in self.pending_servers:
310 self.pending_servers.remove(i.server)
313 #if i.server in self.interfaces: raise
314 self.interfaces[i.server] = i
315 self.add_recent_server(i)
316 i.send([ ('blockchain.headers.subscribe',[])], self.on_header)
317 if i == self.interface:
318 print_error('sending subscriptions to', self.interface.server)
319 self.send_subscriptions()
320 self.trigger_callback('connected')
322 self.disconnected_servers.add(i.server)
323 if i.server in self.interfaces:
324 self.interfaces.pop(i.server)
325 if i.server in self.heights:
326 self.heights.pop(i.server)
327 if i == self.interface:
328 #self.interface = None
329 self.trigger_callback('disconnected')
331 if not self.interface.is_connected and self.config.get('auto_cycle'):
332 self.switch_to_random_interface()
335 def on_header(self, i, r):
336 result = r.get('result')
337 if not result: return
338 height = result.get('block_height')
339 self.heights[i.server] = height
340 self.merkle_roots[i.server] = result.get('merkle_root')
341 self.utxo_roots[i.server] = result.get('utxo_root')
342 # notify blockchain about the new height
343 self.blockchain.queue.put((i,result))
345 if i == self.interface:
346 self.server_lag = self.blockchain.height() - height
347 if self.server_lag > 1 and self.config.get('auto_cycle'):
348 print_error( "Server lagging, stopping interface")
349 self.stop_interface()
351 self.trigger_callback('updated')
354 def on_peers(self, i, r):
356 self.irc_servers = self.parse_servers(r.get('result'))
357 self.trigger_callback('peers')
359 def on_banner(self, i, r):
360 self.banner = r.get('result')
361 self.trigger_callback('banner')
364 with self.lock: self.running = False
366 def is_running(self):
367 with self.lock: return self.running
370 def synchronous_get(self, requests, timeout=100000000):
371 return self.interface.synchronous_get(requests)
375 #def retrieve_transaction(self, tx_hash, tx_height=0):
377 # r = self.synchronous_get([ ('blockchain.transaction.get',[tx_hash, tx_height]) ])[0]
379 # return transaction.Transaction(r)
382 def parse_servers(self, result):
383 """ parse servers list into dict format"""
384 from version import PROTOCOL_VERSION
393 if re.match("[stgh]\d*", v):
394 protocol, port = v[0], v[1:]
395 if port == '': port = DEFAULT_PORTS[protocol]
397 elif re.match("v(.?)+", v):
399 elif re.match("p\d*", v):
400 pruning_level = v[1:]
401 if pruning_level == '': pruning_level = '0'
403 is_recent = float(version)>=float(PROTOCOL_VERSION)
407 if out and is_recent:
408 out['pruning'] = pruning_level
417 # interface to the network object.
418 # handle subscriptions and callbacks
419 # the network object can be jsonrpc server
420 def __init__(self, network):
421 self.network = network
426 if __name__ == "__main__":
428 config = simple_config.SimpleConfig({'verbose':True, 'server':'ecdsa.org:50002:s'})
429 network = Network(config)