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     def __init__(self, node, my_pubkey_hash, donation_percentage, merged_urls, worker_fee):
  18         worker_interface.WorkerBridge.__init__(self)
  19         self.recent_shares_ts_work = []
  20
  21         self.node = node
  22         self.my_pubkey_hash = my_pubkey_hash
  23         self.donation_percentage = donation_percentage
  24         self.worker_fee = worker_fee
  25
  26         self.running = True
  27         self.pseudoshare_received = variable.Event()
  28         self.share_received = variable.Event()
  29         self.local_rate_monitor = math.RateMonitor(10*60)
  30
  31         self.removed_unstales_var = variable.Variable((0, 0, 0))
  32         self.removed_doa_unstales_var = variable.Variable(0)
  33
  34
  35         self.my_share_hashes = set()
  36         self.my_doa_share_hashes = set()
  37
  38         self.tracker_view = forest.TrackerView(self.node.tracker, forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
  39             my_count=lambda share: 1 if share.hash in self.my_share_hashes else 0,
  40             my_doa_count=lambda share: 1 if share.hash in self.my_doa_share_hashes else 0,
  41             my_orphan_announce_count=lambda share: 1 if share.hash in self.my_share_hashes and share.share_data['stale_info'] == 'orphan' else 0,
  42             my_dead_announce_count=lambda share: 1 if share.hash in self.my_share_hashes and share.share_data['stale_info'] == 'doa' else 0,
  43         )))
  44
  45         @self.node.tracker.verified.removed.watch
  46         def _(share):
  47             if share.hash in self.my_share_hashes and self.node.tracker.is_child_of(share.hash, self.node.best_share_var.value):
  48                 assert share.share_data['stale_info'] in [None, 'orphan', 'doa'] # we made these shares in this instance
  49                 self.removed_unstales_var.set((
  50                     self.removed_unstales_var.value[0] + 1,
  51                     self.removed_unstales_var.value[1] + (1 if share.share_data['stale_info'] == 'orphan' else 0),
  52                     self.removed_unstales_var.value[2] + (1 if share.share_data['stale_info'] == 'doa' else 0),
  53                 ))
  54             if share.hash in self.my_doa_share_hashes and self.node.tracker.is_child_of(share.hash, self.node.best_share_var.value):
  55                 self.removed_doa_unstales_var.set(self.removed_doa_unstales_var.value + 1)
  56
  57         # MERGED WORK
  58
  59         self.merged_work = variable.Variable({})
  60
  61         @defer.inlineCallbacks
  62         def set_merged_work(merged_url, merged_userpass):
  63             merged_proxy = jsonrpc.HTTPProxy(merged_url, dict(Authorization='Basic ' + base64.b64encode(merged_userpass)))
  64             while self.running:
  65                 auxblock = yield deferral.retry('Error while calling merged getauxblock:', 30)(merged_proxy.rpc_getauxblock)()
  66                 self.merged_work.set(dict(self.merged_work.value, **{auxblock['chainid']: dict(
  67                     hash=int(auxblock['hash'], 16),
  68                     target='p2pool' if auxblock['target'] == 'p2pool' else pack.IntType(256).unpack(auxblock['target'].decode('hex')),
  69                     merged_proxy=merged_proxy,
  70                 )}))
  71                 yield deferral.sleep(1)
  72         for merged_url, merged_userpass in merged_urls:
  73             set_merged_work(merged_url, merged_userpass)
  74
  75         @self.merged_work.changed.watch
  76         def _(new_merged_work):
  77             print 'Got new merged mining work!'
  78
  79         # COMBINE WORK
  80
  81         self.current_work = variable.Variable(None)
  82         def compute_work():
  83             t = self.node.bitcoind_work.value
  84             bb = self.node.best_block_header.value
  85             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:
  86                 print 'Skipping from block %x to block %x!' % (bb['previous_block'],
  87                     bitcoin_data.hash256(bitcoin_data.block_header_type.pack(bb)))
  88                 t = dict(
  89                     version=bb['version'],
  90                     previous_block=bitcoin_data.hash256(bitcoin_data.block_header_type.pack(bb)),
  91                     bits=bb['bits'], # not always true
  92                     coinbaseflags='',
  93                     height=t['height'] + 1,
  94                     time=bb['timestamp'] + 600, # better way?
  95                     transactions=[],
  96                     transaction_fees=[],
  97                     merkle_link=bitcoin_data.calculate_merkle_link([None], 0),
  98                     subsidy=self.node.net.PARENT.SUBSIDY_FUNC(self.node.bitcoind_work.value['height']),
  99                     last_update=self.node.bitcoind_work.value['last_update'],
 100                 )
 101
 102             self.current_work.set(t)
 103         self.node.bitcoind_work.changed.watch(lambda _: compute_work())
 104         self.node.best_block_header.changed.watch(lambda _: compute_work())
 105         compute_work()
 106
 107         self.new_work_event = variable.Event()
 108         @self.current_work.transitioned.watch
 109         def _(before, after):
 110             # trigger LP if version/previous_block/bits changed or transactions changed from nothing
 111             if any(before[x] != after[x] for x in ['version', 'previous_block', 'bits']) or (not before['transactions'] and after['transactions']):
 112                 self.new_work_event.happened()
 113         self.merged_work.changed.watch(lambda _: self.new_work_event.happened())
 114         self.node.best_share_var.changed.watch(lambda _: self.new_work_event.happened())
 115
 116     def stop(self):
 117         self.running = False
 118
 119     def get_stale_counts(self):
 120         '''Returns (orphans, doas), total, (orphans_recorded_in_chain, doas_recorded_in_chain)'''
 121         my_shares = len(self.my_share_hashes)
 122         my_doa_shares = len(self.my_doa_share_hashes)
 123         delta = self.tracker_view.get_delta_to_last(self.node.best_share_var.value)
 124         my_shares_in_chain = delta.my_count + self.removed_unstales_var.value[0]
 125         my_doa_shares_in_chain = delta.my_doa_count + self.removed_doa_unstales_var.value
 126         orphans_recorded_in_chain = delta.my_orphan_announce_count + self.removed_unstales_var.value[1]
 127         doas_recorded_in_chain = delta.my_dead_announce_count + self.removed_unstales_var.value[2]
 128
 129         my_shares_not_in_chain = my_shares - my_shares_in_chain
 130         my_doa_shares_not_in_chain = my_doa_shares - my_doa_shares_in_chain
 131
 132         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)
 133
 134     def get_user_details(self, user):
 135         desired_pseudoshare_target = None
 136         if '+' in user:
 137             user, desired_pseudoshare_difficulty_str = user.rsplit('+', 1)
 138             try:
 139                 desired_pseudoshare_target = bitcoin_data.difficulty_to_target(float(desired_pseudoshare_difficulty_str))
 140             except:
 141                 pass
 142
 143         desired_share_target = 2**256 - 1
 144         if '/' in user:
 145             user, min_diff_str = user.rsplit('/', 1)
 146             try:
 147                 desired_share_target = bitcoin_data.difficulty_to_target(float(min_diff_str))
 148             except:
 149                 pass
 150
 151         if random.uniform(0, 100) < self.worker_fee:
 152             pubkey_hash = self.my_pubkey_hash
 153         else:
 154             try:
 155                 pubkey_hash = bitcoin_data.address_to_pubkey_hash(user, self.node.net.PARENT)
 156             except: # XXX blah
 157                 pubkey_hash = self.my_pubkey_hash
 158
 159         return user, pubkey_hash, desired_share_target, desired_pseudoshare_target
 160
 161     def preprocess_request(self, user):
 162         user, pubkey_hash, desired_share_target, desired_pseudoshare_target = self.get_user_details(user)
 163         return pubkey_hash, desired_share_target, desired_pseudoshare_target
 164
 165     def get_work(self, pubkey_hash, 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             share_info, gentx, other_transaction_hashes, get_share = share_type.generate_transaction(
 210                 tracker=self.node.tracker,
 211                 share_data=dict(
 212                     previous_share_hash=self.node.best_share_var.value,
 213                     coinbase=(script.create_push_script([
 214                         self.current_work.value['height'],
 215                         ] + ([mm_data] if mm_data else []) + [
 216                     ]) + self.current_work.value['coinbaseflags'])[:100],
 217                     nonce=random.randrange(2**32),
 218                     pubkey_hash=pubkey_hash,
 219                     subsidy=self.current_work.value['subsidy'],
 220                     donation=math.perfect_round(65535*self.donation_percentage/100),
 221                     stale_info=(lambda (orphans, doas), total, (orphans_recorded_in_chain, doas_recorded_in_chain):
 222                         'orphan' if orphans > orphans_recorded_in_chain else
 223                         'doa' if doas > doas_recorded_in_chain else
 224                         None
 225                     )(*self.get_stale_counts()),
 226                     desired_version=10,
 227                 ),
 228                 block_target=self.current_work.value['bits'].target,
 229                 desired_timestamp=int(time.time() + 0.5),
 230                 desired_target=desired_share_target,
 231                 ref_merkle_link=dict(branch=[], index=0),
 232                 desired_other_transaction_hashes_and_fees=zip(tx_hashes, self.current_work.value['transaction_fees']),
 233                 net=self.node.net,
 234                 known_txs=tx_map,
 235                 base_subsidy=self.node.net.PARENT.SUBSIDY_FUNC(self.current_work.value['height']),
 236             )
 237
 238         packed_gentx = bitcoin_data.tx_type.pack(gentx)
 239         other_transactions = [tx_map[tx_hash] for tx_hash in other_transaction_hashes]
 240
 241         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]
 242
 243         if desired_pseudoshare_target is None:
 244             target = 2**256-1
 245             if len(self.recent_shares_ts_work) == 50:
 246                 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])
 247                 if hash_rate:
 248                     target = min(target, int(2**256/hash_rate))
 249         else:
 250             target = desired_pseudoshare_target
 251         target = max(target, share_info['bits'].target)
 252         for aux_work, index, hashes in mm_later:
 253             target = max(target, aux_work['target'])
 254         target = math.clip(target, self.node.net.PARENT.SANE_TARGET_RANGE)
 255
 256         getwork_time = time.time()
 257         lp_count = self.new_work_event.times
 258         merkle_link = bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0)
 259
 260         print 'New work for worker! Difficulty: %.06f Share difficulty: %.06f Total block value: %.6f %s including %i transactions' % (
 261             bitcoin_data.target_to_difficulty(target),
 262             bitcoin_data.target_to_difficulty(share_info['bits'].target),
 263             self.current_work.value['subsidy']*1e-8, self.node.net.PARENT.SYMBOL,
 264             len(self.current_work.value['transactions']),
 265         )
 266
 267         ba = dict(
 268             version=min(self.current_work.value['version'], 2),
 269             previous_block=self.current_work.value['previous_block'],
 270             merkle_link=merkle_link,
 271             coinb1=packed_gentx[:-4-4],
 272             coinb2=packed_gentx[-4:],
 273             timestamp=self.current_work.value['time'],
 274             bits=self.current_work.value['bits'],
 275             share_target=target,
 276         )
 277
 278         received_header_hashes = set()
 279
 280         def got_response(header, user, last_txout_nonce):
 281             new_packed_gentx = packed_gentx[:-4-4] + pack.IntType(32).pack(last_txout_nonce) + packed_gentx[-4:] if last_txout_nonce != 0 else packed_gentx
 282             new_gentx = bitcoin_data.tx_type.unpack(new_packed_gentx) if last_txout_nonce != 0 else gentx
 283
 284             header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(header))
 285             pow_hash = self.node.net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header))
 286             try:
 287                 if pow_hash <= header['bits'].target or p2pool.DEBUG:
 288                     helper.submit_block(dict(header=header, txs=[new_gentx] + other_transactions), False, self.node.factory, self.node.bitcoind, self.node.bitcoind_work, self.node.net)
 289                     if pow_hash <= header['bits'].target:
 290                         print
 291                         print 'GOT BLOCK FROM MINER! Passing to bitcoind! %s%064x' % (self.node.net.PARENT.BLOCK_EXPLORER_URL_PREFIX, header_hash)
 292                         print
 293             except:
 294                 log.err(None, 'Error while processing potential block:')
 295
 296             user, _, _, _ = self.get_user_details(user)
 297             assert header['previous_block'] == ba['previous_block']
 298             assert header['merkle_root'] == bitcoin_data.check_merkle_link(bitcoin_data.hash256(new_packed_gentx), merkle_link)
 299             assert header['bits'] == ba['bits']
 300
 301             on_time = self.new_work_event.times == lp_count
 302
 303             for aux_work, index, hashes in mm_later:
 304                 try:
 305                     if pow_hash <= aux_work['target'] or p2pool.DEBUG:
 306                         df = deferral.retry('Error submitting merged block: (will retry)', 10, 10)(aux_work['merged_proxy'].rpc_getauxblock)(
 307                             pack.IntType(256, 'big').pack(aux_work['hash']).encode('hex'),
 308                             bitcoin_data.aux_pow_type.pack(dict(
 309                                 merkle_tx=dict(
 310                                     tx=new_gentx,
 311                                     block_hash=header_hash,
 312                                     merkle_link=merkle_link,
 313                                 ),
 314                                 merkle_link=bitcoin_data.calculate_merkle_link(hashes, index),
 315                                 parent_block_header=header,
 316                             )).encode('hex'),
 317                         )
 318                         @df.addCallback
 319                         def _(result, aux_work=aux_work):
 320                             if result != (pow_hash <= aux_work['target']):
 321                                 print >>sys.stderr, 'Merged block submittal result: %s Expected: %s' % (result, pow_hash <= aux_work['target'])
 322                             else:
 323                                 print 'Merged block submittal result: %s' % (result,)
 324                         @df.addErrback
 325                         def _(err):
 326                             log.err(err, 'Error submitting merged block:')
 327                 except:
 328                     log.err(None, 'Error while processing merged mining POW:')
 329
 330             if pow_hash <= share_info['bits'].target and header_hash not in received_header_hashes:
 331                 share = get_share(header, last_txout_nonce)
 332
 333                 print 'GOT SHARE! %s %s prev %s age %.2fs%s' % (
 334                     user,
 335                     p2pool_data.format_hash(share.hash),
 336                     p2pool_data.format_hash(share.previous_hash),
 337                     time.time() - getwork_time,
 338                     ' DEAD ON ARRIVAL' if not on_time else '',
 339                 )
 340                 self.my_share_hashes.add(share.hash)
 341                 if not on_time:
 342                     self.my_doa_share_hashes.add(share.hash)
 343
 344                 self.node.tracker.add(share)
 345                 self.node.set_best_share()
 346
 347                 try:
 348                     if (pow_hash <= header['bits'].target or p2pool.DEBUG) and self.node.p2p_node is not None:
 349                         self.node.p2p_node.broadcast_share(share.hash)
 350                 except:
 351                     log.err(None, 'Error forwarding block solution:')
 352
 353                 self.share_received.happened(bitcoin_data.target_to_average_attempts(share.target), not on_time)
 354
 355             if pow_hash > target:
 356                 print 'Worker %s submitted share with hash > target:' % (user,)
 357                 print '    Hash:   %56x' % (pow_hash,)
 358                 print '    Target: %56x' % (target,)
 359             elif header_hash in received_header_hashes:
 360                 print >>sys.stderr, 'Worker %s submitted share more than once!' % (user,)
 361             else:
 362                 received_header_hashes.add(header_hash)
 363
 364                 self.pseudoshare_received.happened(bitcoin_data.target_to_average_attempts(target), not on_time, user)
 365                 self.recent_shares_ts_work.append((time.time(), bitcoin_data.target_to_average_attempts(target)))
 366                 while len(self.recent_shares_ts_work) > 50:
 367                     self.recent_shares_ts_work.pop(0)
 368                 self.local_rate_monitor.add_datum(dict(work=bitcoin_data.target_to_average_attempts(target), dead=not on_time, user=user))
 369
 370             return on_time
 371
 372         return ba, got_response