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, p2pool_port, p2pool_conns, addrs, connect_addrs):
  15         self.node = node
  16         p2p.Node.__init__(self,
  17             best_share_hash_func=lambda: node.best_share_var.value,
  18             port=p2pool_port,
  19             net=node.net,
  20             addr_store=addrs,
  21             connect_addrs=connect_addrs,
  22             max_incoming_conns=p2pool_conns,
  23             known_txs_var=node.known_txs_var,
  24             mining_txs_var=node.mining_txs_var,
  25         )
  26
  27     def handle_shares(self, shares, peer):
  28         if len(shares) > 5:
  29             print 'Processing %i shares from %s...' % (len(shares), '%s:%i' % peer.addr if peer is not None else None)
  30
  31         new_count = 0
  32         for share in shares:
  33             if share.hash in self.node.tracker.items:
  34                 #print 'Got duplicate share, ignoring. Hash: %s' % (p2pool_data.format_hash(share.hash),)
  35                 continue
  36
  37             new_count += 1
  38
  39             #print 'Received share %s from %r' % (p2pool_data.format_hash(share.hash), share.peer.addr if share.peer is not None else None)
  40
  41             self.node.tracker.add(share)
  42
  43         if new_count:
  44             self.node.set_best_share()
  45
  46         if len(shares) > 5:
  47             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)
  48
  49     @defer.inlineCallbacks
  50     def handle_share_hashes(self, hashes, peer):
  51         new_hashes = [x for x in hashes if x not in self.node.tracker.items]
  52         if not new_hashes:
  53             return
  54         try:
  55             shares = yield peer.get_shares(
  56                 hashes=new_hashes,
  57                 parents=0,
  58                 stops=[],
  59             )
  60         except:
  61             log.err(None, 'in handle_share_hashes:')
  62         else:
  63             self.handle_shares(shares, peer)
  64
  65     def handle_get_shares(self, hashes, parents, stops, peer):
  66         parents = min(parents, 1000//len(hashes))
  67         stops = set(stops)
  68         shares = []
  69         for share_hash in hashes:
  70             for share in self.node.tracker.get_chain(share_hash, min(parents + 1, self.node.tracker.get_height(share_hash))):
  71                 if share.hash in stops:
  72                     break
  73                 shares.append(share)
  74         print 'Sending %i shares to %s:%i' % (len(shares), peer.addr[0], peer.addr[1])
  75         return shares
  76
  77     def handle_bestblock(self, header, peer):
  78         if self.node.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header)) > header['bits'].target:
  79             raise p2p.PeerMisbehavingError('received block header fails PoW test')
  80         self.node.handle_header(header)
  81
  82     @defer.inlineCallbacks
  83     def broadcast_share(self, share_hash):
  84         shares = []
  85         for share in self.node.tracker.get_chain(share_hash, min(5, self.node.tracker.get_height(share_hash))):
  86             if share.hash in self.shared_share_hashes:
  87                 break
  88             self.shared_share_hashes.add(share.hash)
  89             shares.append(share)
  90
  91         for peer in list(self.peers.itervalues()):
  92             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])
  93
  94     def start(self):
  95         p2p.Node.start(self)
  96
  97         self.shared_share_hashes = set(self.node.tracker.items)
  98         self.node.tracker.removed.watch_weakref(self, lambda self, share: self.shared_share_hashes.discard(share.hash))
  99
 100         @apply
 101         @defer.inlineCallbacks
 102         def download_shares():
 103             while True:
 104                 desired = yield self.node.desired_var.get_when_satisfies(lambda val: len(val) != 0)
 105                 peer2, share_hash = random.choice(desired)
 106
 107                 if len(self.peers) == 0:
 108                     yield deferral.sleep(1)
 109                     continue
 110                 peer = random.choice(self.peers.values())
 111
 112                 print 'Requesting parent share %s from %s' % (p2pool_data.format_hash(share_hash), '%s:%i' % peer.addr)
 113                 try:
 114                     shares = yield peer.get_shares(
 115                         hashes=[share_hash],
 116                         parents=500,
 117                         stops=[],
 118                     )
 119                 except:
 120                     log.err(None, 'in download_shares:')
 121                     continue
 122
 123                 if not shares:
 124                     yield deferral.sleep(1) # sleep so we don't keep rerequesting the same share nobody has
 125                     continue
 126                 self.handle_shares(shares, peer)
 127
 128
 129         @self.node.best_block_header.changed.watch
 130         def _(header):
 131             for peer in self.peers.itervalues():
 132                 peer.send_bestblock(header=header)
 133
 134         # send share when the chain changes to their chain
 135         self.node.best_share_var.changed.watch(self.broadcast_share)
 136
 137         @self.node.tracker.verified.added.watch
 138         def _(share):
 139             if not (share.pow_hash <= share.header['bits'].target):
 140                 return
 141
 142             def spread():
 143                 if (self.node.get_height_rel_highest(share.header['previous_block']) > -5 or
 144                     self.node.bitcoind_work.value['previous_block'] in [share.header['previous_block'], share.header_hash]):
 145                     self.broadcast_share(share.hash)
 146             spread()
 147             reactor.callLater(5, spread) # so get_height_rel_highest can update
 148
 149
 150 class Node(object):
 151     def __init__(self, factory, bitcoind, shares, known_verified_share_hashes, net):
 152         self.factory = factory
 153         self.bitcoind = bitcoind
 154         self.net = net
 155
 156         self.tracker = p2pool_data.OkayTracker(self.net)
 157
 158         for share in shares:
 159             self.tracker.add(share)
 160
 161         for share_hash in known_verified_share_hashes:
 162             if share_hash in self.tracker.items:
 163                 self.tracker.verified.add(self.tracker.items[share_hash])
 164
 165         self.p2p_node = None # overwritten externally
 166
 167     @defer.inlineCallbacks
 168     def start(self):
 169         stop_signal = variable.Event()
 170         self.stop = stop_signal.happened
 171
 172         # BITCOIND WORK
 173
 174         self.bitcoind_work = variable.Variable((yield helper.getwork(self.bitcoind)))
 175         @defer.inlineCallbacks
 176         def work_poller():
 177             while stop_signal.times == 0:
 178                 flag = self.factory.new_block.get_deferred()
 179                 try:
 180                     self.bitcoind_work.set((yield helper.getwork(self.bitcoind, self.bitcoind_work.value['use_getblocktemplate'])))
 181                 except:
 182                     log.err()
 183                 yield defer.DeferredList([flag, deferral.sleep(15)], fireOnOneCallback=True)
 184         work_poller()
 185
 186         # PEER WORK
 187
 188         self.best_block_header = variable.Variable(None)
 189         def handle_header(new_header):
 190             # check that header matches current target
 191             if not (self.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(new_header)) <= self.bitcoind_work.value['bits'].target):
 192                 return
 193             bitcoind_best_block = self.bitcoind_work.value['previous_block']
 194             if (self.best_block_header.value is None
 195                 or (
 196                     new_header['previous_block'] == bitcoind_best_block and
 197                     bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.best_block_header.value)) == bitcoind_best_block
 198                 ) # new is child of current and previous is current
 199                 or (
 200                     bitcoin_data.hash256(bitcoin_data.block_header_type.pack(new_header)) == bitcoind_best_block and
 201                     self.best_block_header.value['previous_block'] != bitcoind_best_block
 202                 )): # new is current and previous is not a child of current
 203                 self.best_block_header.set(new_header)
 204         self.handle_header = handle_header
 205         @defer.inlineCallbacks
 206         def poll_header():
 207             if self.factory.conn.value is None:
 208                 return
 209             handle_header((yield self.factory.conn.value.get_block_header(self.bitcoind_work.value['previous_block'])))
 210         self.bitcoind_work.changed.watch(lambda _: poll_header())
 211         yield deferral.retry('Error while requesting best block header:')(poll_header)()
 212
 213         # BEST SHARE
 214
 215         self.known_txs_var = variable.Variable({}) # hash -> tx
 216         self.mining_txs_var = variable.Variable({}) # hash -> tx
 217         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)
 218
 219         self.best_share_var = variable.Variable(None)
 220         self.desired_var = variable.Variable(None)
 221         self.bitcoind_work.changed.watch(lambda _: self.set_best_share())
 222         self.set_best_share()
 223
 224         # setup p2p logic and join p2pool network
 225
 226         # update mining_txs according to getwork results
 227         @self.bitcoind_work.changed.run_and_watch
 228         def _(_=None):
 229             new_mining_txs = {}
 230             new_known_txs = dict(self.known_txs_var.value)
 231             for tx_hash, tx in zip(self.bitcoind_work.value['transaction_hashes'], self.bitcoind_work.value['transactions']):
 232                 new_mining_txs[tx_hash] = tx
 233                 new_known_txs[tx_hash] = tx
 234             self.mining_txs_var.set(new_mining_txs)
 235             self.known_txs_var.set(new_known_txs)
 236         # add p2p transactions from bitcoind to known_txs
 237         @self.factory.new_tx.watch
 238         def _(tx):
 239             new_known_txs = dict(self.known_txs_var.value)
 240             new_known_txs[bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx))] = tx
 241             self.known_txs_var.set(new_known_txs)
 242         # forward transactions seen to bitcoind
 243         @self.known_txs_var.transitioned.watch
 244         @defer.inlineCallbacks
 245         def _(before, after):
 246             yield deferral.sleep(random.expovariate(1/1))
 247             if self.factory.conn.value is None:
 248                 return
 249             for tx_hash in set(after) - set(before):
 250                 self.factory.conn.value.send_tx(tx=after[tx_hash])
 251
 252         @self.tracker.verified.added.watch
 253         def _(share):
 254             if not (share.pow_hash <= share.header['bits'].target):
 255                 return
 256
 257             block = share.as_block(self.tracker, self.known_txs_var.value)
 258             if block is None:
 259                 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)
 260                 return
 261             helper.submit_block(block, True, self.factory, self.bitcoind, self.bitcoind_work, self.net)
 262             print
 263             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)
 264             print
 265
 266         def forget_old_txs():
 267             new_known_txs = {}
 268             if self.p2p_node is not None:
 269                 for peer in self.p2p_node.peers.itervalues():
 270                     new_known_txs.update(peer.remembered_txs)
 271             new_known_txs.update(self.mining_txs_var.value)
 272             for share in self.tracker.get_chain(self.best_share_var.value, min(120, self.tracker.get_height(self.best_share_var.value))):
 273                 for tx_hash in share.new_transaction_hashes:
 274                     if tx_hash in self.known_txs_var.value:
 275                         new_known_txs[tx_hash] = self.known_txs_var.value[tx_hash]
 276             self.known_txs_var.set(new_known_txs)
 277         t = task.LoopingCall(forget_old_txs)
 278         t.start(10)
 279         stop_signal.watch(t.stop)
 280
 281         t = task.LoopingCall(self.clean_tracker)
 282         t.start(5)
 283         stop_signal.watch(t.stop)
 284
 285     def set_best_share(self):
 286         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)
 287
 288         self.best_share_var.set(best)
 289         self.desired_var.set(desired)
 290
 291     def get_current_txouts(self):
 292         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)
 293
 294     def clean_tracker(self):
 295         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)
 296
 297         # eat away at heads
 298         if decorated_heads:
 299             for i in xrange(1000):
 300                 to_remove = set()
 301                 for share_hash, tail in self.tracker.heads.iteritems():
 302                     if share_hash in [head_hash for score, head_hash in decorated_heads[-5:]]:
 303                         #print 1
 304                         continue
 305                     if self.tracker.items[share_hash].time_seen > time.time() - 300:
 306                         #print 2
 307                         continue
 308                     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
 309                         #print 3
 310                         continue
 311                     to_remove.add(share_hash)
 312                 if not to_remove:
 313                     break
 314                 for share_hash in to_remove:
 315                     if share_hash in self.tracker.verified.items:
 316                         self.tracker.verified.remove(share_hash)
 317                     self.tracker.remove(share_hash)
 318                 #print "_________", to_remove
 319
 320         # drop tails
 321         for i in xrange(1000):
 322             to_remove = set()
 323             for tail, heads in self.tracker.tails.iteritems():
 324                 if min(self.tracker.get_height(head) for head in heads) < 2*self.tracker.net.CHAIN_LENGTH + 10:
 325                     continue
 326                 to_remove.update(self.tracker.reverse.get(tail, set()))
 327             if not to_remove:
 328                 break
 329             # if removed from this, it must be removed from verified
 330             #start = time.time()
 331             for aftertail in to_remove:
 332                 if self.tracker.items[aftertail].previous_hash not in self.tracker.tails:
 333                     print "erk", aftertail, self.tracker.items[aftertail].previous_hash
 334                     continue
 335                 if aftertail in self.tracker.verified.items:
 336                     self.tracker.verified.remove(aftertail)
 337                 self.tracker.remove(aftertail)
 338             #end = time.time()
 339             #print "removed! %i %f" % (len(to_remove), (end - start)/len(to_remove))
 340
 341         self.set_best_share()