p2pool/node.py

   1 import random
   2 import sys
   3 import time
   4
   5 from twisted.internet import defer, reactor, task
   6 from twisted.python import log
   7
   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
  11
  12
  13 class P2PNode(p2p.Node):
  14     def __init__(self, node, **kwargs):
  15         self.node = node
  16         p2p.Node.__init__(self,
  17             best_share_hash_func=lambda: node.best_share_var.value,
  18             net=node.net,
  19             known_txs_var=node.known_txs_var,
  20             mining_txs_var=node.mining_txs_var,
  21         **kwargs)
  22
  23     def handle_shares(self, shares, peer):
  24         if len(shares) > 5:
  25             print 'Processing %i shares from %s...' % (len(shares), '%s:%i' % peer.addr if peer is not None else None)
  26
  27         new_count = 0
  28         for share in shares:
  29             if share.hash in self.node.tracker.items:
  30                 #print 'Got duplicate share, ignoring. Hash: %s' % (p2pool_data.format_hash(share.hash),)
  31                 continue
  32
  33             new_count += 1
  34
  35             #print 'Received share %s from %r' % (p2pool_data.format_hash(share.hash), share.peer.addr if share.peer is not None else None)
  36
  37             self.node.tracker.add(share)
  38
  39         if new_count:
  40             self.node.set_best_share()
  41
  42         if len(shares) > 5:
  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)
  44
  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]
  48         if not new_hashes:
  49             return
  50         try:
  51             shares = yield peer.get_shares(
  52                 hashes=new_hashes,
  53                 parents=0,
  54                 stops=[],
  55             )
  56         except:
  57             log.err(None, 'in handle_share_hashes:')
  58         else:
  59             self.handle_shares(shares, peer)
  60
  61     def handle_get_shares(self, hashes, parents, stops, peer):
  62         parents = min(parents, 1000//len(hashes))
  63         stops = set(stops)
  64         shares = []
  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:
  68                     break
  69                 shares.append(share)
  70         print 'Sending %i shares to %s:%i' % (len(shares), peer.addr[0], peer.addr[1])
  71         return shares
  72
  73     def handle_bestblock(self, header, peer):
  74         if self.node.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header)) > header['bits'].target:
  75             raise p2p.PeerMisbehavingError('received block header fails PoW test')
  76         self.node.handle_header(header)
  77
  78     @defer.inlineCallbacks
  79     def broadcast_share(self, share_hash):
  80         shares = []
  81         for share in self.node.tracker.get_chain(share_hash, min(5, self.node.tracker.get_height(share_hash))):
  82             if share.hash in self.shared_share_hashes:
  83                 break
  84             self.shared_share_hashes.add(share.hash)
  85             shares.append(share)
  86
  87         for peer in list(self.peers.itervalues()):
  88             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])
  89
  90     def start(self):
  91         p2p.Node.start(self)
  92
  93         self.shared_share_hashes = set(self.node.tracker.items)
  94         self.node.tracker.removed.watch_weakref(self, lambda self, share: self.shared_share_hashes.discard(share.hash))
  95
  96         @apply
  97         @defer.inlineCallbacks
  98         def download_shares():
  99             while True:
 100                 desired = yield self.node.desired_var.get_when_satisfies(lambda val: len(val) != 0)
 101                 peer2, share_hash = random.choice(desired)
 102
 103                 if len(self.peers) == 0:
 104                     yield deferral.sleep(1)
 105                     continue
 106                 peer = random.choice(self.peers.values())
 107
 108                 print 'Requesting parent share %s from %s' % (p2pool_data.format_hash(share_hash), '%s:%i' % peer.addr)
 109                 try:
 110                     shares = yield peer.get_shares(
 111                         hashes=[share_hash],
 112                         parents=500,
 113                         stops=[],
 114                     )
 115                 except:
 116                     log.err(None, 'in download_shares:')
 117                     continue
 118
 119                 if not shares:
 120                     yield deferral.sleep(1) # sleep so we don't keep rerequesting the same share nobody has
 121                     continue
 122                 self.handle_shares(shares, peer)
 123
 124
 125         @self.node.best_block_header.changed.watch
 126         def _(header):
 127             for peer in self.peers.itervalues():
 128                 peer.send_bestblock(header=header)
 129
 130         # send share when the chain changes to their chain
 131         self.node.best_share_var.changed.watch(self.broadcast_share)
 132
 133         @self.node.tracker.verified.added.watch
 134         def _(share):
 135             if not (share.pow_hash <= share.header['bits'].target):
 136                 return
 137
 138             def spread():
 139                 if (self.node.get_height_rel_highest(share.header['previous_block']) > -5 or
 140                     self.node.bitcoind_work.value['previous_block'] in [share.header['previous_block'], share.header_hash]):
 141                     self.broadcast_share(share.hash)
 142             spread()
 143             reactor.callLater(5, spread) # so get_height_rel_highest can update
 144
 145
 146 class Node(object):
 147     def __init__(self, factory, bitcoind, shares, known_verified_share_hashes, net):
 148         self.factory = factory
 149         self.bitcoind = bitcoind
 150         self.net = net
 151
 152         self.tracker = p2pool_data.OkayTracker(self.net)
 153
 154         for share in shares:
 155             self.tracker.add(share)
 156
 157         for share_hash in known_verified_share_hashes:
 158             if share_hash in self.tracker.items:
 159                 self.tracker.verified.add(self.tracker.items[share_hash])
 160
 161         self.p2p_node = None # overwritten externally
 162
 163     @defer.inlineCallbacks
 164     def start(self):
 165         stop_signal = variable.Event()
 166         self.stop = stop_signal.happened
 167
 168         # BITCOIND WORK
 169
 170         self.bitcoind_work = variable.Variable((yield helper.getwork(self.bitcoind)))
 171         @defer.inlineCallbacks
 172         def work_poller():
 173             while stop_signal.times == 0:
 174                 flag = self.factory.new_block.get_deferred()
 175                 try:
 176                     self.bitcoind_work.set((yield helper.getwork(self.bitcoind, self.bitcoind_work.value['use_getblocktemplate'])))
 177                 except:
 178                     log.err()
 179                 yield defer.DeferredList([flag, deferral.sleep(15)], fireOnOneCallback=True)
 180         work_poller()
 181
 182         # PEER WORK
 183
 184         self.best_block_header = variable.Variable(None)
 185         def handle_header(new_header):
 186             # check that header matches current target
 187             if not (self.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(new_header)) <= self.bitcoind_work.value['bits'].target):
 188                 return
 189             bitcoind_best_block = self.bitcoind_work.value['previous_block']
 190             if (self.best_block_header.value is None
 191                 or (
 192                     new_header['previous_block'] == bitcoind_best_block and
 193                     bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.best_block_header.value)) == bitcoind_best_block
 194                 ) # new is child of current and previous is current
 195                 or (
 196                     bitcoin_data.hash256(bitcoin_data.block_header_type.pack(new_header)) == bitcoind_best_block and
 197                     self.best_block_header.value['previous_block'] != bitcoind_best_block
 198                 )): # new is current and previous is not a child of current
 199                 self.best_block_header.set(new_header)
 200         self.handle_header = handle_header
 201         @defer.inlineCallbacks
 202         def poll_header():
 203             if self.factory.conn.value is None:
 204                 return
 205             handle_header((yield self.factory.conn.value.get_block_header(self.bitcoind_work.value['previous_block'])))
 206         self.bitcoind_work.changed.watch(lambda _: poll_header())
 207         yield deferral.retry('Error while requesting best block header:')(poll_header)()
 208
 209         # BEST SHARE
 210
 211         self.known_txs_var = variable.Variable({}) # hash -> tx
 212         self.mining_txs_var = variable.Variable({}) # hash -> tx
 213         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)
 214
 215         self.best_share_var = variable.Variable(None)
 216         self.desired_var = variable.Variable(None)
 217         self.bitcoind_work.changed.watch(lambda _: self.set_best_share())
 218         self.set_best_share()
 219
 220         # setup p2p logic and join p2pool network
 221
 222         # update mining_txs according to getwork results
 223         @self.bitcoind_work.changed.run_and_watch
 224         def _(_=None):
 225             new_mining_txs = {}
 226             new_known_txs = dict(self.known_txs_var.value)
 227             for tx_hash, tx in zip(self.bitcoind_work.value['transaction_hashes'], self.bitcoind_work.value['transactions']):
 228                 new_mining_txs[tx_hash] = tx
 229                 new_known_txs[tx_hash] = tx
 230             self.mining_txs_var.set(new_mining_txs)
 231             self.known_txs_var.set(new_known_txs)
 232         # add p2p transactions from bitcoind to known_txs
 233         @self.factory.new_tx.watch
 234         def _(tx):
 235             new_known_txs = dict(self.known_txs_var.value)
 236             new_known_txs[bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx))] = tx
 237             self.known_txs_var.set(new_known_txs)
 238         # forward transactions seen to bitcoind
 239         @self.known_txs_var.transitioned.watch
 240         @defer.inlineCallbacks
 241         def _(before, after):
 242             yield deferral.sleep(random.expovariate(1/1))
 243             if self.factory.conn.value is None:
 244                 return
 245             for tx_hash in set(after) - set(before):
 246                 self.factory.conn.value.send_tx(tx=after[tx_hash])
 247
 248         @self.tracker.verified.added.watch
 249         def _(share):
 250             if not (share.pow_hash <= share.header['bits'].target):
 251                 return
 252
 253             block = share.as_block(self.tracker, self.known_txs_var.value)
 254             if block is None:
 255                 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)
 256                 return
 257             helper.submit_block(block, True, self.factory, self.bitcoind, self.bitcoind_work, self.net)
 258             print
 259             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)
 260             print
 261
 262         def forget_old_txs():
 263             new_known_txs = {}
 264             if self.p2p_node is not None:
 265                 for peer in self.p2p_node.peers.itervalues():
 266                     new_known_txs.update(peer.remembered_txs)
 267             new_known_txs.update(self.mining_txs_var.value)
 268             for share in self.tracker.get_chain(self.best_share_var.value, min(120, self.tracker.get_height(self.best_share_var.value))):
 269                 for tx_hash in share.new_transaction_hashes:
 270                     if tx_hash in self.known_txs_var.value:
 271                         new_known_txs[tx_hash] = self.known_txs_var.value[tx_hash]
 272             self.known_txs_var.set(new_known_txs)
 273         t = task.LoopingCall(forget_old_txs)
 274         t.start(10)
 275         stop_signal.watch(t.stop)
 276
 277         t = task.LoopingCall(self.clean_tracker)
 278         t.start(5)
 279         stop_signal.watch(t.stop)
 280
 281     def set_best_share(self):
 282         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)
 283
 284         self.best_share_var.set(best)
 285         self.desired_var.set(desired)
 286
 287     def get_current_txouts(self):
 288         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)
 289
 290     def clean_tracker(self):
 291         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)
 292
 293         # eat away at heads
 294         if decorated_heads:
 295             for i in xrange(1000):
 296                 to_remove = set()
 297                 for share_hash, tail in self.tracker.heads.iteritems():
 298                     if share_hash in [head_hash for score, head_hash in decorated_heads[-5:]]:
 299                         #print 1
 300                         continue
 301                     if self.tracker.items[share_hash].time_seen > time.time() - 300:
 302                         #print 2
 303                         continue
 304                     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
 305                         #print 3
 306                         continue
 307                     to_remove.add(share_hash)
 308                 if not to_remove:
 309                     break
 310                 for share_hash in to_remove:
 311                     if share_hash in self.tracker.verified.items:
 312                         self.tracker.verified.remove(share_hash)
 313                     self.tracker.remove(share_hash)
 314                 #print "_________", to_remove
 315
 316         # drop tails
 317         for i in xrange(1000):
 318             to_remove = set()
 319             for tail, heads in self.tracker.tails.iteritems():
 320                 if min(self.tracker.get_height(head) for head in heads) < 2*self.tracker.net.CHAIN_LENGTH + 10:
 321                     continue
 322                 to_remove.update(self.tracker.reverse.get(tail, set()))
 323             if not to_remove:
 324                 break
 325             # if removed from this, it must be removed from verified
 326             #start = time.time()
 327             for aftertail in to_remove:
 328                 if self.tracker.items[aftertail].previous_hash not in self.tracker.tails:
 329                     print "erk", aftertail, self.tracker.items[aftertail].previous_hash
 330                     continue
 331                 if aftertail in self.tracker.verified.items:
 332                     self.tracker.verified.remove(aftertail)
 333                 self.tracker.remove(aftertail)
 334             #end = time.time()
 335             #print "removed! %i %f" % (len(to_remove), (end - start)/len(to_remove))
 336
 337         self.set_best_share()