5 from twisted.internet import defer, reactor, task
6 from twisted.python import log
8 from p2pool import data as p2pool_data, p2p
9 from p2pool.bitcoin import data as bitcoin_data, helper, height_tracker
10 from p2pool.util import deferral, variable
13 class P2PNode(p2p.Node):
14 def __init__(self, node, **kwargs):
16 p2p.Node.__init__(self,
17 best_share_hash_func=lambda: node.best_share_var.value,
19 known_txs_var=node.known_txs_var,
20 mining_txs_var=node.mining_txs_var,
23 def handle_shares(self, shares, peer):
25 print 'Processing %i shares from %s...' % (len(shares), '%s:%i' % peer.addr if peer is not None else None)
29 if share.hash in self.node.tracker.items:
30 #print 'Got duplicate share, ignoring. Hash: %s' % (p2pool_data.format_hash(share.hash),)
35 #print 'Received share %s from %r' % (p2pool_data.format_hash(share.hash), share.peer.addr if share.peer is not None else None)
37 self.node.tracker.add(share)
40 self.node.set_best_share()
43 print '... done processing %i shares. New: %i Have: %i/~%i' % (len(shares), new_count, len(self.node.tracker.items), 2*self.node.net.CHAIN_LENGTH)
45 @defer.inlineCallbacks
46 def handle_share_hashes(self, hashes, peer):
47 new_hashes = [x for x in hashes if x not in self.node.tracker.items]
51 shares = yield peer.get_shares(
57 log.err(None, 'in handle_share_hashes:')
59 self.handle_shares(shares, peer)
61 def handle_get_shares(self, hashes, parents, stops, peer):
62 parents = min(parents, 1000//len(hashes))
65 for share_hash in hashes:
66 for share in self.node.tracker.get_chain(share_hash, min(parents + 1, self.node.tracker.get_height(share_hash))):
67 if share.hash in stops:
71 print 'Sending %i shares to %s:%i' % (len(shares), peer.addr[0], peer.addr[1])
74 def handle_bestblock(self, header, peer):
75 if self.node.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header)) > header['bits'].target:
76 raise p2p.PeerMisbehavingError('received block header fails PoW test')
77 self.node.handle_header(header)
79 @defer.inlineCallbacks
80 def broadcast_share(self, share_hash):
82 for share in self.node.tracker.get_chain(share_hash, min(5, self.node.tracker.get_height(share_hash))):
83 if share.hash in self.shared_share_hashes:
85 self.shared_share_hashes.add(share.hash)
88 for peer in list(self.peers.itervalues()):
89 yield peer.sendShares([share for share in shares if share.peer is not peer], self.node.tracker, self.node.known_txs_var.value, include_txs_with=[share_hash])
94 self.shared_share_hashes = set(self.node.tracker.items)
95 self.node.tracker.removed.watch_weakref(self, lambda self, share: self.shared_share_hashes.discard(share.hash))
98 @defer.inlineCallbacks
99 def download_shares():
101 desired = yield self.node.desired_var.get_when_satisfies(lambda val: len(val) != 0)
102 peer2, share_hash = random.choice(desired)
104 if len(self.peers) == 0:
105 yield deferral.sleep(1)
107 peer = random.choice(self.peers.values())
109 print 'Requesting parent share %s from %s' % (p2pool_data.format_hash(share_hash), '%s:%i' % peer.addr)
111 shares = yield peer.get_shares(
113 parents=random.randrange(500), # randomize parents so that we eventually get past a too large block of shares
114 stops=list(set(self.node.tracker.heads) | set(
115 self.node.tracker.get_nth_parent_hash(head, min(max(0, self.node.tracker.get_height_and_last(head)[0] - 1), 10)) for head in self.node.tracker.heads
118 except defer.TimeoutError:
119 print 'Share request timed out!'
122 log.err(None, 'in download_shares:')
126 yield deferral.sleep(1) # sleep so we don't keep rerequesting the same share nobody has
128 self.handle_shares(shares, peer)
131 @self.node.best_block_header.changed.watch
133 for peer in self.peers.itervalues():
134 peer.send_bestblock(header=header)
136 # send share when the chain changes to their chain
137 self.node.best_share_var.changed.watch(self.broadcast_share)
139 @self.node.tracker.verified.added.watch
141 if not (share.pow_hash <= share.header['bits'].target):
145 if (self.node.get_height_rel_highest(share.header['previous_block']) > -5 or
146 self.node.bitcoind_work.value['previous_block'] in [share.header['previous_block'], share.header_hash]):
147 self.broadcast_share(share.hash)
149 reactor.callLater(5, spread) # so get_height_rel_highest can update
153 def __init__(self, factory, bitcoind, shares, known_verified_share_hashes, net):
154 self.factory = factory
155 self.bitcoind = bitcoind
158 self.tracker = p2pool_data.OkayTracker(self.net)
161 self.tracker.add(share)
163 for share_hash in known_verified_share_hashes:
164 if share_hash in self.tracker.items:
165 self.tracker.verified.add(self.tracker.items[share_hash])
167 self.p2p_node = None # overwritten externally
169 @defer.inlineCallbacks
171 stop_signal = variable.Event()
172 self.stop = stop_signal.happened
176 self.bitcoind_work = variable.Variable((yield helper.getwork(self.bitcoind)))
177 @defer.inlineCallbacks
179 while stop_signal.times == 0:
180 flag = self.factory.new_block.get_deferred()
182 self.bitcoind_work.set((yield helper.getwork(self.bitcoind, self.bitcoind_work.value['use_getblocktemplate'])))
185 yield defer.DeferredList([flag, deferral.sleep(15)], fireOnOneCallback=True)
190 self.best_block_header = variable.Variable(None)
191 def handle_header(new_header):
192 # check that header matches current target
193 if not (self.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(new_header)) <= self.bitcoind_work.value['bits'].target):
195 bitcoind_best_block = self.bitcoind_work.value['previous_block']
196 if (self.best_block_header.value is None
198 new_header['previous_block'] == bitcoind_best_block and
199 bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.best_block_header.value)) == bitcoind_best_block
200 ) # new is child of current and previous is current
202 bitcoin_data.hash256(bitcoin_data.block_header_type.pack(new_header)) == bitcoind_best_block and
203 self.best_block_header.value['previous_block'] != bitcoind_best_block
204 )): # new is current and previous is not a child of current
205 self.best_block_header.set(new_header)
206 self.handle_header = handle_header
207 @defer.inlineCallbacks
209 if self.factory.conn.value is None:
211 handle_header((yield self.factory.conn.value.get_block_header(self.bitcoind_work.value['previous_block'])))
212 self.bitcoind_work.changed.watch(lambda _: poll_header())
213 yield deferral.retry('Error while requesting best block header:')(poll_header)()
217 self.known_txs_var = variable.Variable({}) # hash -> tx
218 self.mining_txs_var = variable.Variable({}) # hash -> tx
219 self.get_height_rel_highest = yield height_tracker.get_height_rel_highest_func(self.bitcoind, self.factory, lambda: self.bitcoind_work.value['previous_block'], self.net)
221 self.best_share_var = variable.Variable(None)
222 self.desired_var = variable.Variable(None)
223 self.bitcoind_work.changed.watch(lambda _: self.set_best_share())
224 self.set_best_share()
226 # setup p2p logic and join p2pool network
228 # update mining_txs according to getwork results
229 @self.bitcoind_work.changed.run_and_watch
232 new_known_txs = dict(self.known_txs_var.value)
233 for tx_hash, tx in zip(self.bitcoind_work.value['transaction_hashes'], self.bitcoind_work.value['transactions']):
234 new_mining_txs[tx_hash] = tx
235 new_known_txs[tx_hash] = tx
236 self.mining_txs_var.set(new_mining_txs)
237 self.known_txs_var.set(new_known_txs)
238 # add p2p transactions from bitcoind to known_txs
239 @self.factory.new_tx.watch
241 new_known_txs = dict(self.known_txs_var.value)
242 new_known_txs[bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx))] = tx
243 self.known_txs_var.set(new_known_txs)
244 # forward transactions seen to bitcoind
245 @self.known_txs_var.transitioned.watch
246 @defer.inlineCallbacks
247 def _(before, after):
248 yield deferral.sleep(random.expovariate(1/1))
249 if self.factory.conn.value is None:
251 for tx_hash in set(after) - set(before):
252 self.factory.conn.value.send_tx(tx=after[tx_hash])
254 @self.tracker.verified.added.watch
256 if not (share.pow_hash <= share.header['bits'].target):
259 block = share.as_block(self.tracker, self.known_txs_var.value)
261 print >>sys.stderr, 'GOT INCOMPLETE BLOCK FROM PEER! %s bitcoin: %s%064x' % (p2pool_data.format_hash(share.hash), self.net.PARENT.BLOCK_EXPLORER_URL_PREFIX, share.header_hash)
263 helper.submit_block(block, True, self.factory, self.bitcoind, self.bitcoind_work, self.net)
265 print 'GOT BLOCK FROM PEER! Passing to bitcoind! %s bitcoin: %s%064x' % (p2pool_data.format_hash(share.hash), self.net.PARENT.BLOCK_EXPLORER_URL_PREFIX, share.header_hash)
268 def forget_old_txs():
270 if self.p2p_node is not None:
271 for peer in self.p2p_node.peers.itervalues():
272 new_known_txs.update(peer.remembered_txs)
273 new_known_txs.update(self.mining_txs_var.value)
274 for share in self.tracker.get_chain(self.best_share_var.value, min(120, self.tracker.get_height(self.best_share_var.value))):
275 for tx_hash in share.new_transaction_hashes:
276 if tx_hash in self.known_txs_var.value:
277 new_known_txs[tx_hash] = self.known_txs_var.value[tx_hash]
278 self.known_txs_var.set(new_known_txs)
279 t = task.LoopingCall(forget_old_txs)
281 stop_signal.watch(t.stop)
283 t = task.LoopingCall(self.clean_tracker)
285 stop_signal.watch(t.stop)
287 def set_best_share(self):
288 best, desired, decorated_heads = self.tracker.think(self.get_height_rel_highest, self.bitcoind_work.value['previous_block'], self.bitcoind_work.value['bits'], self.known_txs_var.value)
290 self.best_share_var.set(best)
291 self.desired_var.set(desired)
293 def get_current_txouts(self):
294 return p2pool_data.get_expected_payouts(self.tracker, self.best_share_var.value, self.bitcoind_work.value['bits'].target, self.bitcoind_work.value['subsidy'], self.net)
296 def clean_tracker(self):
297 best, desired, decorated_heads = self.tracker.think(self.get_height_rel_highest, self.bitcoind_work.value['previous_block'], self.bitcoind_work.value['bits'], self.known_txs_var.value)
301 for i in xrange(1000):
303 for share_hash, tail in self.tracker.heads.iteritems():
304 if share_hash in [head_hash for score, head_hash in decorated_heads[-5:]]:
307 if self.tracker.items[share_hash].time_seen > time.time() - 300:
310 if share_hash not in self.tracker.verified.items and max(self.tracker.items[after_tail_hash].time_seen for after_tail_hash in self.tracker.reverse.get(tail)) > time.time() - 120: # XXX stupid
313 to_remove.add(share_hash)
316 for share_hash in to_remove:
317 if share_hash in self.tracker.verified.items:
318 self.tracker.verified.remove(share_hash)
319 self.tracker.remove(share_hash)
320 #print "_________", to_remove
323 for i in xrange(1000):
325 for tail, heads in self.tracker.tails.iteritems():
326 if min(self.tracker.get_height(head) for head in heads) < 2*self.tracker.net.CHAIN_LENGTH + 10:
328 to_remove.update(self.tracker.reverse.get(tail, set()))
331 # if removed from this, it must be removed from verified
333 for aftertail in to_remove:
334 if self.tracker.items[aftertail].previous_hash not in self.tracker.tails:
335 print "erk", aftertail, self.tracker.items[aftertail].previous_hash
337 if aftertail in self.tracker.verified.items:
338 self.tracker.verified.remove(aftertail)
339 self.tracker.remove(aftertail)
341 #print "removed! %i %f" % (len(to_remove), (end - start)/len(to_remove))
343 self.set_best_share()