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 script, worker_interface
  13 from util import jsonrpc, variable, deferral, math, pack
  14 import p2pool, p2pool.data as p2pool_data
  15
  16 class WorkerBridge(worker_interface.WorkerBridge):
  17     def __init__(self, my_pubkey_hash, net, donation_percentage, bitcoind_work, best_block_header, merged_urls, best_share_var, tracker, my_share_hashes, my_doa_share_hashes, worker_fee, p2p_node, submit_block, set_best_share, broadcast_share):
  18         worker_interface.WorkerBridge.__init__(self)
  19         self.recent_shares_ts_work = []
  20
  21         self.my_pubkey_hash = my_pubkey_hash
  22         self.net = net
  23         self.donation_percentage = donation_percentage
  24         self.bitcoind_work = bitcoind_work
  25         self.best_block_header = best_block_header
  26         self.best_share_var = best_share_var
  27         self.tracker = tracker
  28         self.my_share_hashes = my_share_hashes
  29         self.my_doa_share_hashes = my_doa_share_hashes
  30         self.worker_fee = worker_fee
  31         self.p2p_node = p2p_node
  32         self.submit_block = submit_block
  33         self.set_best_share = set_best_share
  34         self.broadcast_share = broadcast_share
  35
  36         self.pseudoshare_received = variable.Event()
  37         self.share_received = variable.Event()
  38         self.local_rate_monitor = math.RateMonitor(10*60)
  39
  40         self.removed_unstales_var = variable.Variable((0, 0, 0))
  41         self.removed_doa_unstales_var = variable.Variable(0)
  42
  43         @tracker.verified.removed.watch
  44         def _(share):
  45             if share.hash in self.my_share_hashes and tracker.is_child_of(share.hash, self.best_share_var.value):
  46                 assert share.share_data['stale_info'] in [None, 'orphan', 'doa'] # we made these shares in this instance
  47                 self.removed_unstales_var.set((
  48                     self.removed_unstales_var.value[0] + 1,
  49                     self.removed_unstales_var.value[1] + (1 if share.share_data['stale_info'] == 'orphan' else 0),
  50                     self.removed_unstales_var.value[2] + (1 if share.share_data['stale_info'] == 'doa' else 0),
  51                 ))
  52             if share.hash in self.my_doa_share_hashes and self.tracker.is_child_of(share.hash, self.best_share_var.value):
  53                 self.removed_doa_unstales_var.set(self.removed_doa_unstales_var.value + 1)
  54
  55         # MERGED WORK
  56
  57         self.merged_work = variable.Variable({})
  58
  59         @defer.inlineCallbacks
  60         def set_merged_work(merged_url, merged_userpass):
  61             merged_proxy = jsonrpc.Proxy(merged_url, dict(Authorization='Basic ' + base64.b64encode(merged_userpass)))
  62             while True:
  63                 auxblock = yield deferral.retry('Error while calling merged getauxblock:', 30)(merged_proxy.rpc_getauxblock)()
  64                 self.merged_work.set(dict(self.merged_work.value, **{auxblock['chainid']: dict(
  65                     hash=int(auxblock['hash'], 16),
  66                     target='p2pool' if auxblock['target'] == 'p2pool' else pack.IntType(256).unpack(auxblock['target'].decode('hex')),
  67                     merged_proxy=merged_proxy,
  68                 )}))
  69                 yield deferral.sleep(1)
  70         for merged_url, merged_userpass in merged_urls:
  71             set_merged_work(merged_url, merged_userpass)
  72
  73         @self.merged_work.changed.watch
  74         def _(new_merged_work):
  75             print 'Got new merged mining work!'
  76
  77         # COMBINE WORK
  78
  79         self.current_work = variable.Variable(None)
  80         def compute_work():
  81             t = self.bitcoind_work.value
  82             bb = self.best_block_header.value
  83             if bb is not None and bb['previous_block'] == t['previous_block'] and net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(bb)) <= t['bits'].target:
  84                 print 'Skipping from block %x to block %x!' % (bb['previous_block'],
  85                     bitcoin_data.hash256(bitcoin_data.block_header_type.pack(bb)))
  86                 t = dict(
  87                     version=bb['version'],
  88                     previous_block=bitcoin_data.hash256(bitcoin_data.block_header_type.pack(bb)),
  89                     bits=bb['bits'], # not always true
  90                     coinbaseflags='',
  91                     height=t['height'] + 1,
  92                     time=bb['timestamp'] + 600, # better way?
  93                     transactions=[],
  94                     merkle_link=bitcoin_data.calculate_merkle_link([None], 0),
  95                     subsidy=net.PARENT.SUBSIDY_FUNC(self.bitcoind_work.value['height']),
  96                     last_update=self.bitcoind_work.value['last_update'],
  97                 )
  98
  99             self.current_work.set(t)
 100         self.bitcoind_work.changed.watch(lambda _: compute_work())
 101         self.best_block_header.changed.watch(lambda _: compute_work())
 102         compute_work()
 103
 104         self.new_work_event = variable.Event()
 105         @self.current_work.transitioned.watch
 106         def _(before, after):
 107             # trigger LP if version/previous_block/bits changed or transactions changed from nothing
 108             if any(before[x] != after[x] for x in ['version', 'previous_block', 'bits']) or (not before['transactions'] and after['transactions']):
 109                 self.new_work_event.happened()
 110         self.merged_work.changed.watch(lambda _: self.new_work_event.happened())
 111         self.best_share_var.changed.watch(lambda _: self.new_work_event.happened())
 112
 113     def get_stale_counts(self):
 114         '''Returns (orphans, doas), total, (orphans_recorded_in_chain, doas_recorded_in_chain)'''
 115         my_shares = len(self.my_share_hashes)
 116         my_doa_shares = len(self.my_doa_share_hashes)
 117         delta = self.tracker.verified.get_delta_to_last(self.best_share_var.value)
 118         my_shares_in_chain = delta.my_count + self.removed_unstales_var.value[0]
 119         my_doa_shares_in_chain = delta.my_doa_count + self.removed_doa_unstales_var.value
 120         orphans_recorded_in_chain = delta.my_orphan_announce_count + self.removed_unstales_var.value[1]
 121         doas_recorded_in_chain = delta.my_dead_announce_count + self.removed_unstales_var.value[2]
 122
 123         my_shares_not_in_chain = my_shares - my_shares_in_chain
 124         my_doa_shares_not_in_chain = my_doa_shares - my_doa_shares_in_chain
 125
 126         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)
 127
 128     def get_user_details(self, request):
 129         user = request.getUser() if request.getUser() is not None else ''
 130
 131         desired_pseudoshare_target = None
 132         if '+' in user:
 133             user, desired_pseudoshare_difficulty_str = user.rsplit('+', 1)
 134             try:
 135                 desired_pseudoshare_target = bitcoin_data.difficulty_to_target(float(desired_pseudoshare_difficulty_str))
 136             except:
 137                 pass
 138
 139         desired_share_target = 2**256 - 1
 140         if '/' in user:
 141             user, min_diff_str = user.rsplit('/', 1)
 142             try:
 143                 desired_share_target = bitcoin_data.difficulty_to_target(float(min_diff_str))
 144             except:
 145                 pass
 146
 147         if random.uniform(0, 100) < self.worker_fee:
 148             pubkey_hash = self.my_pubkey_hash
 149         else:
 150             try:
 151                 pubkey_hash = bitcoin_data.address_to_pubkey_hash(user, self.net.PARENT)
 152             except: # XXX blah
 153                 pubkey_hash = self.my_pubkey_hash
 154
 155         return user, pubkey_hash, desired_share_target, desired_pseudoshare_target
 156
 157     def preprocess_request(self, request):
 158         user, pubkey_hash, desired_share_target, desired_pseudoshare_target = self.get_user_details(request)
 159         return pubkey_hash, desired_share_target, desired_pseudoshare_target
 160
 161     def get_work(self, pubkey_hash, desired_share_target, desired_pseudoshare_target):
 162         if len(self.p2p_node.peers) == 0 and self.net.PERSIST:
 163             raise jsonrpc.Error_for_code(-12345)(u'p2pool is not connected to any peers')
 164         if self.best_share_var.value is None and self.net.PERSIST:
 165             raise jsonrpc.Error_for_code(-12345)(u'p2pool is downloading shares')
 166         if time.time() > self.current_work.value['last_update'] + 60:
 167             raise jsonrpc.Error_for_code(-12345)(u'lost contact with bitcoind')
 168
 169         if self.merged_work.value:
 170             tree, size = bitcoin_data.make_auxpow_tree(self.merged_work.value)
 171             mm_hashes = [self.merged_work.value.get(tree.get(i), dict(hash=0))['hash'] for i in xrange(size)]
 172             mm_data = '\xfa\xbemm' + bitcoin_data.aux_pow_coinbase_type.pack(dict(
 173                 merkle_root=bitcoin_data.merkle_hash(mm_hashes),
 174                 size=size,
 175                 nonce=0,
 176             ))
 177             mm_later = [(aux_work, mm_hashes.index(aux_work['hash']), mm_hashes) for chain_id, aux_work in self.merged_work.value.iteritems()]
 178         else:
 179             mm_data = ''
 180             mm_later = []
 181
 182         tx_hashes = [bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx)) for tx in self.current_work.value['transactions']]
 183         tx_map = dict(zip(tx_hashes, self.current_work.value['transactions']))
 184
 185         share_type = p2pool_data.NewShare
 186         if self.best_share_var.value is not None:
 187             previous_share = self.tracker.items[self.best_share_var.value]
 188             if isinstance(previous_share, p2pool_data.Share):
 189                 # Share -> NewShare only valid if 85% of hashes in [net.CHAIN_LENGTH*9//10, net.CHAIN_LENGTH] for new version
 190                 if self.tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
 191                     share_type = p2pool_data.Share
 192                 elif time.time() < 1351383661 and self.net.NAME == 'bitcoin':
 193                     share_type = p2pool_data.Share
 194                 else:
 195                     counts = p2pool_data.get_desired_version_counts(self.tracker,
 196                         self.tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
 197                     if counts.get(p2pool_data.NewShare.VERSION, 0) < sum(counts.itervalues())*95//100:
 198                         share_type = p2pool_data.Share
 199
 200         if True:
 201             share_info, gentx, other_transaction_hashes, get_share = share_type.generate_transaction(
 202                 tracker=self.tracker,
 203                 share_data=dict(
 204                     previous_share_hash=self.best_share_var.value,
 205                     coinbase=(script.create_push_script([
 206                         self.current_work.value['height'],
 207                         ] + ([mm_data] if mm_data else []) + [
 208                     ]) + self.current_work.value['coinbaseflags'])[:100],
 209                     nonce=random.randrange(2**32),
 210                     pubkey_hash=pubkey_hash,
 211                     subsidy=self.current_work.value['subsidy'],
 212                     donation=math.perfect_round(65535*self.donation_percentage/100),
 213                     stale_info=(lambda (orphans, doas), total, (orphans_recorded_in_chain, doas_recorded_in_chain):
 214                         'orphan' if orphans > orphans_recorded_in_chain else
 215                         'doa' if doas > doas_recorded_in_chain else
 216                         None
 217                     )(*self.get_stale_counts()),
 218                     desired_version=p2pool_data.NewShare.VERSION,
 219                 ),
 220                 block_target=self.current_work.value['bits'].target,
 221                 desired_timestamp=int(time.time() + 0.5),
 222                 desired_target=desired_share_target,
 223                 ref_merkle_link=dict(branch=[], index=0),
 224                 desired_other_transaction_hashes=tx_hashes,
 225                 net=self.net,
 226                 known_txs=tx_map,
 227             )
 228
 229         transactions = [gentx] + [tx_map[tx_hash] for tx_hash in other_transaction_hashes]
 230
 231         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]
 232
 233         if desired_pseudoshare_target is None:
 234             target = 2**256-1
 235             if len(self.recent_shares_ts_work) == 50:
 236                 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])
 237                 if hash_rate:
 238                     target = min(target, int(2**256/hash_rate))
 239         else:
 240             target = desired_pseudoshare_target
 241         target = max(target, share_info['bits'].target)
 242         for aux_work, index, hashes in mm_later:
 243             target = max(target, aux_work['target'])
 244         target = math.clip(target, self.net.PARENT.SANE_TARGET_RANGE)
 245
 246         getwork_time = time.time()
 247         lp_count = self.new_work_event.times
 248         merkle_link = bitcoin_data.calculate_merkle_link([bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx)) for tx in transactions], 0)
 249
 250         print 'New work for worker! Difficulty: %.06f Share difficulty: %.06f Total block value: %.6f %s including %i transactions' % (
 251             bitcoin_data.target_to_difficulty(target),
 252             bitcoin_data.target_to_difficulty(share_info['bits'].target),
 253             self.current_work.value['subsidy']*1e-8, self.net.PARENT.SYMBOL,
 254             len(self.current_work.value['transactions']),
 255         )
 256
 257         ba = bitcoin_getwork.BlockAttempt(
 258             version=min(self.current_work.value['version'], 2),
 259             previous_block=self.current_work.value['previous_block'],
 260             merkle_root=bitcoin_data.check_merkle_link(bitcoin_data.hash256(bitcoin_data.tx_type.pack(transactions[0])), merkle_link),
 261             timestamp=self.current_work.value['time'],
 262             bits=self.current_work.value['bits'],
 263             share_target=target,
 264         )
 265
 266         received_header_hashes = set()
 267
 268         def got_response(header, request):
 269             header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(header))
 270             pow_hash = self.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header))
 271             try:
 272                 if pow_hash <= header['bits'].target or p2pool.DEBUG:
 273                     self.submit_block(dict(header=header, txs=transactions), ignore_failure=False)
 274                     if pow_hash <= header['bits'].target:
 275                         print
 276                         print 'GOT BLOCK FROM MINER! Passing to bitcoind! %s%064x' % (self.net.PARENT.BLOCK_EXPLORER_URL_PREFIX, header_hash)
 277                         print
 278             except:
 279                 log.err(None, 'Error while processing potential block:')
 280
 281             user, _, _, _ = self.get_user_details(request)
 282             assert header['previous_block'] == ba.previous_block
 283             assert header['merkle_root'] == ba.merkle_root
 284             assert header['bits'] == ba.bits
 285
 286             on_time = self.new_work_event.times == lp_count
 287
 288             for aux_work, index, hashes in mm_later:
 289                 try:
 290                     if pow_hash <= aux_work['target'] or p2pool.DEBUG:
 291                         df = deferral.retry('Error submitting merged block: (will retry)', 10, 10)(aux_work['merged_proxy'].rpc_getauxblock)(
 292                             pack.IntType(256, 'big').pack(aux_work['hash']).encode('hex'),
 293                             bitcoin_data.aux_pow_type.pack(dict(
 294                                 merkle_tx=dict(
 295                                     tx=transactions[0],
 296                                     block_hash=header_hash,
 297                                     merkle_link=merkle_link,
 298                                 ),
 299                                 merkle_link=bitcoin_data.calculate_merkle_link(hashes, index),
 300                                 parent_block_header=header,
 301                             )).encode('hex'),
 302                         )
 303                         @df.addCallback
 304                         def _(result, aux_work=aux_work):
 305                             if result != (pow_hash <= aux_work['target']):
 306                                 print >>sys.stderr, 'Merged block submittal result: %s Expected: %s' % (result, pow_hash <= aux_work['target'])
 307                             else:
 308                                 print 'Merged block submittal result: %s' % (result,)
 309                         @df.addErrback
 310                         def _(err):
 311                             log.err(err, 'Error submitting merged block:')
 312                 except:
 313                     log.err(None, 'Error while processing merged mining POW:')
 314
 315             if pow_hash <= share_info['bits'].target and header_hash not in received_header_hashes:
 316                 share = get_share(header, transactions)
 317
 318                 print 'GOT SHARE! %s %s prev %s age %.2fs%s' % (
 319                     request.getUser(),
 320                     p2pool_data.format_hash(share.hash),
 321                     p2pool_data.format_hash(share.previous_hash),
 322                     time.time() - getwork_time,
 323                     ' DEAD ON ARRIVAL' if not on_time else '',
 324                 )
 325                 self.my_share_hashes.add(share.hash)
 326                 if not on_time:
 327                     self.my_doa_share_hashes.add(share.hash)
 328
 329                 self.tracker.add(share)
 330                 if not p2pool.DEBUG:
 331                     self.tracker.verified.add(share)
 332                 self.set_best_share()
 333
 334                 try:
 335                     if pow_hash <= header['bits'].target or p2pool.DEBUG:
 336                         self.broadcast_share(share.hash)
 337                 except:
 338                     log.err(None, 'Error forwarding block solution:')
 339
 340                 self.share_received.happened(bitcoin_data.target_to_average_attempts(share.target), not on_time)
 341
 342             if pow_hash > target:
 343                 print 'Worker %s submitted share with hash > target:' % (request.getUser(),)
 344                 print '    Hash:   %56x' % (pow_hash,)
 345                 print '    Target: %56x' % (target,)
 346             elif header_hash in received_header_hashes:
 347                 print >>sys.stderr, 'Worker %s @ %s submitted share more than once!' % (request.getUser(), request.getClientIP())
 348             else:
 349                 received_header_hashes.add(header_hash)
 350
 351                 self.pseudoshare_received.happened(bitcoin_data.target_to_average_attempts(target), not on_time, user)
 352                 self.recent_shares_ts_work.append((time.time(), bitcoin_data.target_to_average_attempts(target)))
 353                 while len(self.recent_shares_ts_work) > 50:
 354                     self.recent_shares_ts_work.pop(0)
 355                 self.local_rate_monitor.add_datum(dict(work=bitcoin_data.target_to_average_attempts(target), dead=not on_time, user=user))
 356
 357             return on_time
 358
 359         return ba, got_response