p2pool/work.py

   1 from __future__ import division
   2
   3 import base64
   4 import random
   5 import sys
   6 import time
   7
   8 from twisted.internet import defer
   9 from twisted.python import log
  10
  11 import bitcoin.getwork as bitcoin_getwork, bitcoin.data as bitcoin_data
  12 from bitcoin import helper, script, worker_interface
  13 from util import forest, jsonrpc, variable, deferral, math, pack
  14 import p2pool, p2pool.data as p2pool_data
  15
  16 class WorkerBridge(worker_interface.WorkerBridge):
  17     COINBASE_NONCE_LENGTH = 4
  18
  19     def __init__(self, node, my_pubkey, donation_percentage, merged_urls, worker_fee):
  20         worker_interface.WorkerBridge.__init__(self)
  21         self.recent_shares_ts_work = []
  22
  23         self.node = node
  24         self.my_pubkey = my_pubkey
  25         self.donation_percentage = donation_percentage
  26         self.worker_fee = worker_fee
  27
  28         self.running = True
  29         self.pseudoshare_received = variable.Event()
  30         self.share_received = variable.Event()
  31         self.local_rate_monitor = math.RateMonitor(10*60)
  32
  33         self.removed_unstales_var = variable.Variable((0, 0, 0))
  34         self.removed_doa_unstales_var = variable.Variable(0)
  35
  36
  37         self.my_share_hashes = set()
  38         self.my_doa_share_hashes = set()
  39
  40         self.tracker_view = forest.TrackerView(self.node.tracker, forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
  41             my_count=lambda share: 1 if share.hash in self.my_share_hashes else 0,
  42             my_doa_count=lambda share: 1 if share.hash in self.my_doa_share_hashes else 0,
  43             my_orphan_announce_count=lambda share: 1 if share.hash in self.my_share_hashes and share.share_data['stale_info'] == 'orphan' else 0,
  44             my_dead_announce_count=lambda share: 1 if share.hash in self.my_share_hashes and share.share_data['stale_info'] == 'doa' else 0,
  45         )))
  46
  47         @self.node.tracker.verified.removed.watch
  48         def _(share):
  49             if share.hash in self.my_share_hashes and self.node.tracker.is_child_of(share.hash, self.node.best_share_var.value):
  50                 assert share.share_data['stale_info'] in [None, 'orphan', 'doa'] # we made these shares in this instance
  51                 self.removed_unstales_var.set((
  52                     self.removed_unstales_var.value[0] + 1,
  53                     self.removed_unstales_var.value[1] + (1 if share.share_data['stale_info'] == 'orphan' else 0),
  54                     self.removed_unstales_var.value[2] + (1 if share.share_data['stale_info'] == 'doa' else 0),
  55                 ))
  56             if share.hash in self.my_doa_share_hashes and self.node.tracker.is_child_of(share.hash, self.node.best_share_var.value):
  57                 self.removed_doa_unstales_var.set(self.removed_doa_unstales_var.value + 1)
  58
  59         # MERGED WORK
  60
  61         self.merged_work = variable.Variable({})
  62
  63         @defer.inlineCallbacks
  64         def set_merged_work(merged_url, merged_userpass):
  65             merged_proxy = jsonrpc.HTTPProxy(merged_url, dict(Authorization='Basic ' + base64.b64encode(merged_userpass)))
  66             while self.running:
  67                 auxblock = yield deferral.retry('Error while calling merged getauxblock:', 30)(merged_proxy.rpc_getauxblock)()
  68                 self.merged_work.set(dict(self.merged_work.value, **{auxblock['chainid']: dict(
  69                     hash=int(auxblock['hash'], 16),
  70                     target='p2pool' if auxblock['target'] == 'p2pool' else pack.IntType(256).unpack(auxblock['target'].decode('hex')),
  71                     merged_proxy=merged_proxy,
  72                 )}))
  73                 yield deferral.sleep(1)
  74         for merged_url, merged_userpass in merged_urls:
  75             set_merged_work(merged_url, merged_userpass)
  76
  77         @self.merged_work.changed.watch
  78         def _(new_merged_work):
  79             print 'Got new merged mining work!'
  80
  81         # COMBINE WORK
  82
  83
  84         self.current_work = variable.Variable(None)
  85         def compute_work():
  86             t = self.node.bitcoind_work.value
  87             bb = self.node.best_block_header.value
  88
  89 #            subsidy = self.node.net.PARENT.SUBSIDY_FUNC(self.node.pow_bits.target)
  90
  91             if bb is not None and bb['previous_block'] == t['previous_block'] and self.node.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(bb)) <= t['bits'].target:
  92                 print 'Skipping from block %x to block %x!' % (bb['previous_block'],
  93                     self.node.net.PARENT.BLOCKHASH_FUNC(bitcoin_data.block_header_type.pack(bb)))
  94                 t = dict(
  95                     version=bb['version'],
  96                     previous_block=self.node.net.PARENT.BLOCKHASH_FUNC(bitcoin_data.block_header_type.pack(bb)),
  97                     bits=self.node.pow_bits, # not always true
  98                     coinbaseflags='',
  99                     height=t['height'] + 1,
 100                     time=t['time'] + 5, # better way?
 101                     transactions=[],
 102                     transaction_fees=[],
 103                     merkle_link=bitcoin_data.calculate_merkle_link([None], 0),
 104                     subsidy=self.node.pow_subsidy,
 105                     last_update=self.node.bitcoind_work.value['last_update'],
 106                 )
 107
 108             self.current_work.set(t)
 109         self.node.bitcoind_work.changed.watch(lambda _: compute_work())
 110         self.node.best_block_header.changed.watch(lambda _: compute_work())
 111         compute_work()
 112
 113         self.new_work_event = variable.Event()
 114         @self.current_work.transitioned.watch
 115         def _(before, after):
 116             # trigger LP if version/previous_block/bits changed or transactions changed from nothing
 117             if any(before[x] != after[x] for x in ['version', 'previous_block', 'bits']) or (not before['transactions'] and after['transactions']):
 118                 self.new_work_event.happened()
 119         self.merged_work.changed.watch(lambda _: self.new_work_event.happened())
 120         self.node.best_share_var.changed.watch(lambda _: self.new_work_event.happened())
 121
 122     def stop(self):
 123         self.running = False
 124
 125     def get_stale_counts(self):
 126         '''Returns (orphans, doas), total, (orphans_recorded_in_chain, doas_recorded_in_chain)'''
 127         my_shares = len(self.my_share_hashes)
 128         my_doa_shares = len(self.my_doa_share_hashes)
 129         delta = self.tracker_view.get_delta_to_last(self.node.best_share_var.value)
 130         my_shares_in_chain = delta.my_count + self.removed_unstales_var.value[0]
 131         my_doa_shares_in_chain = delta.my_doa_count + self.removed_doa_unstales_var.value
 132         orphans_recorded_in_chain = delta.my_orphan_announce_count + self.removed_unstales_var.value[1]
 133         doas_recorded_in_chain = delta.my_dead_announce_count + self.removed_unstales_var.value[2]
 134
 135         my_shares_not_in_chain = my_shares - my_shares_in_chain
 136         my_doa_shares_not_in_chain = my_doa_shares - my_doa_shares_in_chain
 137
 138         return (my_shares_not_in_chain - my_doa_shares_not_in_chain, my_doa_shares_not_in_chain), my_shares, (orphans_recorded_in_chain, doas_recorded_in_chain)
 139
 140     def get_user_details(self, user):
 141         desired_pseudoshare_target = None
 142         if '+' in user:
 143             user, desired_pseudoshare_difficulty_str = user.rsplit('+', 1)
 144             try:
 145                 desired_pseudoshare_target = bitcoin_data.difficulty_to_target(float(desired_pseudoshare_difficulty_str))
 146             except:
 147                 pass
 148
 149         desired_share_target = 2**256 - 1
 150         if '/' in user:
 151             user, min_diff_str = user.rsplit('/', 1)
 152             try:
 153                 desired_share_target = bitcoin_data.difficulty_to_target(float(min_diff_str))
 154             except:
 155                 pass
 156
 157         pubkey = self.my_pubkey
 158
 159         return user, pubkey, desired_share_target, desired_pseudoshare_target
 160
 161     def preprocess_request(self, user):
 162         user, pubkey, desired_share_target, desired_pseudoshare_target = self.get_user_details(user)
 163         return pubkey, desired_share_target, desired_pseudoshare_target
 164
 165     def get_work(self, pubkey, desired_share_target, desired_pseudoshare_target):
 166         if (self.node.p2p_node is None or len(self.node.p2p_node.peers) == 0) and self.node.net.PERSIST:
 167             raise jsonrpc.Error_for_code(-12345)(u'p2pool is not connected to any peers')
 168         if self.node.best_share_var.value is None and self.node.net.PERSIST:
 169             raise jsonrpc.Error_for_code(-12345)(u'p2pool is downloading shares')
 170         if time.time() > self.current_work.value['last_update'] + 60:
 171             raise jsonrpc.Error_for_code(-12345)(u'lost contact with bitcoind')
 172
 173         if self.merged_work.value:
 174             tree, size = bitcoin_data.make_auxpow_tree(self.merged_work.value)
 175             mm_hashes = [self.merged_work.value.get(tree.get(i), dict(hash=0))['hash'] for i in xrange(size)]
 176             mm_data = '\xfa\xbemm' + bitcoin_data.aux_pow_coinbase_type.pack(dict(
 177                 merkle_root=bitcoin_data.merkle_hash(mm_hashes),
 178                 size=size,
 179                 nonce=0,
 180             ))
 181             mm_later = [(aux_work, mm_hashes.index(aux_work['hash']), mm_hashes) for chain_id, aux_work in self.merged_work.value.iteritems()]
 182         else:
 183             mm_data = ''
 184             mm_later = []
 185
 186         tx_hashes = [bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx)) for tx in self.current_work.value['transactions']]
 187         tx_map = dict(zip(tx_hashes, self.current_work.value['transactions']))
 188
 189         if self.node.best_share_var.value is None:
 190             share_type = p2pool_data.Share
 191         else:
 192             previous_share = self.node.tracker.items[self.node.best_share_var.value]
 193             previous_share_type = type(previous_share)
 194
 195             if previous_share_type.SUCCESSOR is None or self.node.tracker.get_height(previous_share.hash) < self.node.net.CHAIN_LENGTH:
 196                 share_type = previous_share_type
 197             else:
 198                 successor_type = previous_share_type.SUCCESSOR
 199
 200                 counts = p2pool_data.get_desired_version_counts(self.node.tracker,
 201                     self.node.tracker.get_nth_parent_hash(previous_share.hash, self.node.net.CHAIN_LENGTH*9//10), self.node.net.CHAIN_LENGTH//10)
 202                 # Share -> NewShare only valid if 85% of hashes in [net.CHAIN_LENGTH*9//10, net.CHAIN_LENGTH] for new version
 203                 if counts.get(successor_type.VERSION, 0) > sum(counts.itervalues())*95//100:
 204                     share_type = successor_type
 205                 else:
 206                     share_type = previous_share_type
 207
 208         if True:
 209             subsidy = self.node.net.PARENT.SUBSIDY_FUNC(self.current_work.value['bits'].target)
 210
 211             share_info, gentx, other_transaction_hashes, get_share = share_type.generate_transaction(
 212                 tracker=self.node.tracker,
 213                 share_data=dict(
 214                     previous_share_hash=self.node.best_share_var.value,
 215                     coinbase=(script.create_push_script([
 216                         self.current_work.value['height'],
 217                         ] + ([mm_data] if mm_data else []) + [
 218                     ]) + self.current_work.value['coinbaseflags'])[:100],
 219                     nonce=random.randrange(2**32),
 220                     pubkey=pubkey,
 221                     subsidy=self.current_work.value['subsidy'],
 222                     donation=math.perfect_round(65535*self.donation_percentage/100),
 223                     stale_info=(lambda (orphans, doas), total, (orphans_recorded_in_chain, doas_recorded_in_chain):
 224                         'orphan' if orphans > orphans_recorded_in_chain else
 225                         'doa' if doas > doas_recorded_in_chain else
 226                         None
 227                     )(*self.get_stale_counts()),
 228                     desired_version=12,
 229                 ),
 230                 block_target=self.current_work.value['bits'].target,
 231                 desired_timestamp=int(time.time() + 0.5),
 232                 desired_target=desired_share_target,
 233                 ref_merkle_link=dict(branch=[], index=0),
 234                 desired_other_transaction_hashes_and_fees=zip(tx_hashes, self.current_work.value['transaction_fees']),
 235                 net=self.node.net,
 236                 known_txs=tx_map,
 237                 base_subsidy=subsidy
 238             )
 239
 240         packed_gentx = bitcoin_data.tx_type.pack(gentx)
 241         other_transactions = [tx_map[tx_hash] for tx_hash in other_transaction_hashes]
 242
 243         mm_later = [(dict(aux_work, target=aux_work['target'] if aux_work['target'] != 'p2pool' else share_info['bits'].target), index, hashes) for aux_work, index, hashes in mm_later]
 244
 245         if desired_pseudoshare_target is None:
 246             target = 2**256-1
 247             if len(self.recent_shares_ts_work) == 50:
 248                 hash_rate = sum(work for ts, work in self.recent_shares_ts_work[1:])//(self.recent_shares_ts_work[-1][0] - self.recent_shares_ts_work[0][0])
 249                 if hash_rate:
 250                     target = min(target, int(2**256/hash_rate))
 251         else:
 252             target = desired_pseudoshare_target
 253         target = max(target, share_info['bits'].target)
 254         for aux_work, index, hashes in mm_later:
 255             target = max(target, aux_work['target'])
 256         target = math.clip(target, self.node.net.PARENT.SANE_TARGET_RANGE)
 257
 258         getwork_time = time.time()
 259         lp_count = self.new_work_event.times
 260         merkle_link = bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0)
 261
 262         print 'New work for worker! Difficulty: %.06f Share difficulty: %.06f Total block value: %.6f %s including %i transactions' % (
 263             bitcoin_data.target_to_difficulty(target),
 264             bitcoin_data.target_to_difficulty(share_info['bits'].target),
 265             self.current_work.value['subsidy']*1e-6, self.node.net.PARENT.SYMBOL,
 266             len(self.current_work.value['transactions']),
 267         )
 268
 269         ba = dict(
 270             version=min(self.current_work.value['version'], 2),
 271             previous_block=self.current_work.value['previous_block'],
 272             merkle_link=merkle_link,
 273             coinb1=packed_gentx[:-4-4],
 274             coinb2=packed_gentx[-4:],
 275             timestamp=gentx['timestamp'],
 276             bits=self.current_work.value['bits'],
 277             share_target=target,
 278         )
 279
 280         received_header_hashes = set()
 281
 282         def got_response(header, user, coinbase_nonce):
 283             assert len(coinbase_nonce) == self.COINBASE_NONCE_LENGTH == 4
 284             new_packed_gentx = packed_gentx[:-4-4] + coinbase_nonce + packed_gentx[-4:] if coinbase_nonce != '\0'*self.COINBASE_NONCE_LENGTH else packed_gentx
 285             new_gentx = bitcoin_data.tx_type.unpack(new_packed_gentx) if coinbase_nonce != '\0'*self.COINBASE_NONCE_LENGTH else gentx
 286
 287             header_hash = self.node.net.PARENT.BLOCKHASH_FUNC(bitcoin_data.block_header_type.pack(header))
 288             pow_hash = self.node.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header))
 289             try:
 290                 if header['timestamp'] > new_gentx['timestamp'] + 3600:
 291                     print
 292                     print header['timestamp'], '>', new_gentx['timestamp'] + 3600
 293                     print 'Coinbase timestamp is too early!'
 294                     print
 295
 296                     return
 297
 298                 if header['timestamp'] < new_gentx['timestamp']:
 299                     print
 300                     print header['timestamp'], '<', new_gentx['timestamp']
 301                     print 'Block header timestamp is before coinbase timestamp!'
 302                     print
 303                     return
 304
 305                 if pow_hash <= header['bits'].target or p2pool.DEBUG:
 306                     helper.submit_block(dict(header=header, txs=[new_gentx] + other_transactions, signature=''), False, self.node.factory, self.node.bitcoind, self.node.bitcoind_work, self.node.net)
 307                     if pow_hash <= header['bits'].target:
 308                         print
 309                         print 'GOT BLOCK FROM MINER! Passing to bitcoind! %s%064x' % (self.node.net.PARENT.BLOCK_EXPLORER_URL_PREFIX, header_hash)
 310                         print
 311             except:
 312                 log.err(None, 'Error while processing potential block:')
 313
 314             user, _, _, _ = self.get_user_details(user)
 315             assert header['previous_block'] == ba['previous_block']
 316             assert header['merkle_root'] == bitcoin_data.check_merkle_link(bitcoin_data.hash256(new_packed_gentx), merkle_link)
 317             assert header['bits'] == ba['bits']
 318
 319             on_time = self.new_work_event.times == lp_count
 320
 321             for aux_work, index, hashes in mm_later:
 322                 try:
 323                     if pow_hash <= aux_work['target'] or p2pool.DEBUG:
 324                         df = deferral.retry('Error submitting merged block: (will retry)', 10, 10)(aux_work['merged_proxy'].rpc_getauxblock)(
 325                             pack.IntType(256, 'big').pack(aux_work['hash']).encode('hex'),
 326                             bitcoin_data.aux_pow_type.pack(dict(
 327                                 merkle_tx=dict(
 328                                     tx=new_gentx,
 329                                     block_hash=header_hash,
 330                                     merkle_link=merkle_link,
 331                                 ),
 332                                 merkle_link=bitcoin_data.calculate_merkle_link(hashes, index),
 333                                 parent_block_header=header,
 334                             )).encode('hex'),
 335                         )
 336                         @df.addCallback
 337                         def _(result, aux_work=aux_work):
 338                             if result != (pow_hash <= aux_work['target']):
 339                                 print >>sys.stderr, 'Merged block submittal result: %s Expected: %s' % (result, pow_hash <= aux_work['target'])
 340                             else:
 341                                 print 'Merged block submittal result: %s' % (result,)
 342                         @df.addErrback
 343                         def _(err):
 344                             log.err(err, 'Error submitting merged block:')
 345                 except:
 346                     log.err(None, 'Error while processing merged mining POW:')
 347
 348             if pow_hash <= share_info['bits'].target and header_hash not in received_header_hashes:
 349                 share = get_share(header, pack.IntType(32).unpack(coinbase_nonce))
 350
 351                 print 'GOT SHARE! %s %s prev %s age %.2fs%s' % (
 352                     user,
 353                     p2pool_data.format_hash(share.hash),
 354                     p2pool_data.format_hash(share.previous_hash),
 355                     time.time() - getwork_time,
 356                     ' DEAD ON ARRIVAL' if not on_time else '',
 357                 )
 358                 self.my_share_hashes.add(share.hash)
 359                 if not on_time:
 360                     self.my_doa_share_hashes.add(share.hash)
 361
 362                 self.node.tracker.add(share)
 363                 self.node.set_best_share()
 364
 365                 try:
 366                     if (pow_hash <= header['bits'].target or p2pool.DEBUG) and self.node.p2p_node is not None:
 367                         self.node.p2p_node.broadcast_share(share.hash)
 368                 except:
 369                     log.err(None, 'Error forwarding block solution:')
 370
 371                 self.share_received.happened(bitcoin_data.target_to_average_attempts(share.target), not on_time)
 372
 373             if pow_hash > target:
 374                 print 'Worker %s submitted share with hash > target:' % (user,)
 375                 print '    Hash:   %56x' % (pow_hash,)
 376                 print '    Target: %56x' % (target,)
 377             elif header_hash in received_header_hashes:
 378                 print >>sys.stderr, 'Worker %s submitted share more than once!' % (user,)
 379             else:
 380                 received_header_hashes.add(header_hash)
 381
 382                 self.pseudoshare_received.happened(bitcoin_data.target_to_average_attempts(target), not on_time, user)
 383                 self.recent_shares_ts_work.append((time.time(), bitcoin_data.target_to_average_attempts(target)))
 384                 while len(self.recent_shares_ts_work) > 50:
 385                     self.recent_shares_ts_work.pop(0)
 386                 self.local_rate_monitor.add_datum(dict(work=bitcoin_data.target_to_average_attempts(target), dead=not on_time, user=user))
 387
 388             return on_time
 389
 390         return ba, got_response