1 from __future__ import division
8 from math import ceil, floor
10 from twisted.python import log
13 from p2pool.bitcoin import data as bitcoin_data, script, sha256
14 from p2pool.util import math, forest, pack
16 minout = pow(10, 6) / 100;
20 hash_link_type = pack.ComposedType([
21 ('state', pack.FixedStrType(32)),
22 ('extra_data', pack.FixedStrType(0)), # bit of a hack, but since the donation script is at the end, const_ending is long enough to always make this empty
23 ('length', pack.VarIntType()),
26 def prefix_to_hash_link(prefix, const_ending=''):
27 assert prefix.endswith(const_ending), (prefix, const_ending)
28 x = sha256.sha256(prefix)
29 return dict(state=x.state, extra_data=x.buf[:max(0, len(x.buf)-len(const_ending))], length=x.length//8)
31 def check_hash_link(hash_link, data, const_ending=''):
32 extra_length = hash_link['length'] % (512//8)
33 assert len(hash_link['extra_data']) == max(0, extra_length - len(const_ending))
34 extra = (hash_link['extra_data'] + const_ending)[len(hash_link['extra_data']) + len(const_ending) - extra_length:]
35 assert len(extra) == extra_length
36 return pack.IntType(256).unpack(hashlib.sha256(sha256.sha256(data, (hash_link['state'], extra, 8*hash_link['length'])).digest()).digest())
40 share_type = pack.ComposedType([
41 ('type', pack.VarIntType()),
42 ('contents', pack.VarStrType()),
45 def load_share(share, net, peer_addr):
46 assert peer_addr is None or isinstance(peer_addr, tuple)
47 if share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
48 from p2pool import p2p
49 raise p2p.PeerMisbehavingError('sent an obsolete share')
50 elif share['type'] == Share.VERSION:
51 return Share(net, peer_addr, Share.share_type.unpack(share['contents']))
53 raise ValueError('unknown share type: %r' % (share['type'],))
55 DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
63 small_block_header_type = pack.ComposedType([
64 ('version', pack.VarIntType()),
65 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
66 ('timestamp', pack.IntType(32)),
67 ('bits', bitcoin_data.FloatingIntegerType()),
68 ('nonce', pack.IntType(32)),
71 share_info_type = pack.ComposedType([
72 ('share_data', pack.ComposedType([
73 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
74 ('coinbase', pack.VarStrType()),
75 ('nonce', pack.IntType(32)),
76 ('pubkey', pack.FixedStrType(33)),
77 ('subsidy', pack.IntType(64)),
78 ('donation', pack.IntType(16)),
79 ('stale_info', pack.EnumType(pack.IntType(8), dict((k, {0: None, 253: 'orphan', 254: 'doa'}.get(k, 'unk%i' % (k,))) for k in xrange(256)))),
80 ('desired_version', pack.VarIntType()),
82 ('new_transaction_hashes', pack.ListType(pack.IntType(256))),
83 ('transaction_hash_refs', pack.ListType(pack.VarIntType(), 2)), # pairs of share_count, tx_count
84 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
85 ('max_bits', bitcoin_data.FloatingIntegerType()),
86 ('bits', bitcoin_data.FloatingIntegerType()),
87 ('timestamp', pack.IntType(32)),
90 share_type = pack.ComposedType([
91 ('min_header', small_block_header_type),
92 ('share_info', share_info_type),
93 ('ref_merkle_link', pack.ComposedType([
94 ('branch', pack.ListType(pack.IntType(256))),
95 ('index', pack.IntType(0)),
97 ('last_txout_nonce', pack.IntType(32)),
98 ('hash_link', hash_link_type),
99 ('merkle_link', pack.ComposedType([
100 ('branch', pack.ListType(pack.IntType(256))),
101 ('index', pack.IntType(0)), # it will always be 0
105 ref_type = pack.ComposedType([
106 ('identifier', pack.FixedStrType(64//8)),
107 ('share_info', share_info_type),
111 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(minout) + pack.VarStrType().pack('\x24' + pack.IntType(256).pack(0) + pack.IntType(32).pack(0))[:2]
114 def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes_and_fees, net, known_txs=None, last_txout_nonce=0, base_subsidy=None):
115 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
117 def get_coinbase_fee(outpointsnum):
118 # calculate neccessary coinbase fee
119 coinbase_size = 59 + outpointsnum * 44 + 50
121 # if coinbase size is greater than 1000 bytes, it should pay fee (0.01 per 1000 bytes)
122 if coinbase_size > 1000:
123 return ceil(coinbase_size / 1000.0) * minout
127 if base_subsidy is None:
128 base_subsidy = net.PARENT.SUBSIDY_FUNC(block_target)
130 # current user payout script
131 this_script = bitcoin_data.pubkey_to_script2(share_data['pubkey'])
133 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
134 assert height >= net.REAL_CHAIN_LENGTH or last is None
135 if height < net.TARGET_LOOKBEHIND:
136 pre_target3 = net.MAX_TARGET
138 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
139 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
140 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
141 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
142 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
143 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
145 new_transaction_hashes = []
146 new_transaction_size = 0
147 transaction_hash_refs = []
148 other_transaction_hashes = []
150 past_shares = list(tracker.get_chain(share_data['previous_share_hash'], min(height, 100)))
152 for i, share in enumerate(past_shares):
153 for j, tx_hash in enumerate(share.new_transaction_hashes):
154 if tx_hash not in tx_hash_to_this:
155 tx_hash_to_this[tx_hash] = [1+i, j] # share_count, tx_count
156 for tx_hash, fee in desired_other_transaction_hashes_and_fees:
157 if tx_hash in tx_hash_to_this:
158 this = tx_hash_to_this[tx_hash]
160 if known_txs is not None:
161 this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
162 if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
164 new_transaction_size += this_size
165 new_transaction_hashes.append(tx_hash)
166 this = [0, len(new_transaction_hashes)-1]
167 transaction_hash_refs.extend(this)
168 other_transaction_hashes.append(tx_hash)
170 included_transactions = set(other_transaction_hashes)
172 share_data = dict(share_data, subsidy=base_subsidy)
174 raw_weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
175 min(height, net.REAL_CHAIN_LENGTH),
176 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
179 # calculate "raw" subsidy
180 raw_subsidy = share_data['subsidy'] - 3 * minout - get_coinbase_fee(len(raw_weights) + 1)
182 # calculate "raw" amounts
183 raw_amounts = dict((script, raw_subsidy*weight//total_weight) for script, weight in raw_weights.iteritems())
185 total_remowed_weight = 0
188 # iterate list and collect all weights, which produces less than 0.01 payout
189 # it's neccessary due to NVC/PPC protocol-level limitations for coinbase outpoint size
190 for x in raw_amounts.keys():
191 if raw_amounts[x] < minout and x not in [this_script, DONATION_SCRIPT]:
192 total_remowed_weight = total_remowed_weight + raw_weights[x]
194 weights[x] = raw_weights[x]
196 total_weight = total_weight - total_remowed_weight
197 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
200 # base subsidy value calculated as:
201 # [subsidy - (0.01 for donation + 0.01 for current user + 0.01 for p2pool outpoint) - netfee]
202 my_subsidy = share_data['subsidy'] - 3 * minout - get_coinbase_fee(len(weights) + 1)
204 # subsidy goes according to weights prior to this share
205 amounts = dict((script, my_subsidy*weight//total_weight) for script, weight in weights.iteritems())
207 # all that's left over is the donation weight and some extra satoshis due to rounding
208 amounts[DONATION_SCRIPT] = amounts.get(DONATION_SCRIPT, 0) + my_subsidy - sum(amounts.itervalues())
210 if sum(amounts.itervalues()) != my_subsidy or any(x < 0 for x in amounts.itervalues()):
213 # add 0.01 coin to donation, to satisfy the protocol
214 amounts[DONATION_SCRIPT] = amounts[DONATION_SCRIPT] + minout
216 # add 0.01 to current user output, to satisfy the protocol
217 amounts[this_script] = amounts.get(this_script, 0) + minout
221 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
226 share_data=share_data,
227 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
230 timestamp=math.clip(desired_timestamp, (
231 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
232 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
233 )) if previous_share is not None else desired_timestamp,
234 new_transaction_hashes=new_transaction_hashes,
235 transaction_hash_refs=transaction_hash_refs,
240 # coinbase timestamp must be older than share/block timestamp
241 # maybe there are more elegant solution, but this hack works quite well for now
242 timestamp=share_info['timestamp'],
244 previous_output=None,
246 script=share_data['coinbase'],
248 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
249 # add 0.01 coin to service output, to satisfy the protocol
251 script='\x24' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(32).pack(last_txout_nonce),
258 def get_share(header, last_txout_nonce=last_txout_nonce):
259 min_header = dict(header); del min_header['merkle_root']
260 share = cls(net, None, dict(
261 min_header=min_header,
262 share_info=share_info,
263 ref_merkle_link=dict(branch=[], index=0),
264 last_txout_nonce=last_txout_nonce,
265 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4-4], cls.gentx_before_refhash),
266 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
268 assert share.header == header # checks merkle_root
271 return share_info, gentx, other_transaction_hashes, get_share
274 def get_ref_hash(cls, net, share_info, ref_merkle_link):
275 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
276 identifier=net.IDENTIFIER,
277 share_info=share_info,
278 ))), ref_merkle_link))
280 __slots__ = 'net peer_addr contents min_header share_info hash_link merkle_link hash share_data max_target target timestamp previous_hash new_script desired_version gentx_hash header pow_hash header_hash new_transaction_hashes time_seen'.split(' ')
282 def __init__(self, net, peer_addr, contents):
284 self.peer_addr = peer_addr
285 self.contents = contents
287 self.min_header = contents['min_header']
288 self.share_info = contents['share_info']
289 self.hash_link = contents['hash_link']
290 self.merkle_link = contents['merkle_link']
292 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
293 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
295 if len(self.merkle_link['branch']) > 16:
296 raise ValueError('merkle branch too long!')
298 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
300 self.share_data = self.share_info['share_data']
301 self.max_target = self.share_info['max_bits'].target
302 self.target = self.share_info['bits'].target
303 self.timestamp = self.share_info['timestamp']
304 self.previous_hash = self.share_data['previous_share_hash']
305 self.new_script = bitcoin_data.pubkey_to_script2(self.share_data['pubkey'])
306 self.desired_version = self.share_data['desired_version']
309 for share_count, tx_count in self.iter_transaction_hash_refs():
310 assert share_count < 110
313 assert n == set(range(len(self.share_info['new_transaction_hashes'])))
315 self.gentx_hash = check_hash_link(
317 self.get_ref_hash(net, self.share_info, contents['ref_merkle_link']) + pack.IntType(32).pack(self.contents['last_txout_nonce']) + pack.IntType(32).pack(0),
318 self.gentx_before_refhash,
320 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
321 self.header = dict(self.min_header, merkle_root=merkle_root)
322 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
323 self.hash = self.header_hash = net.PARENT.BLOCKHASH_FUNC(bitcoin_data.block_header_type.pack(self.header))
325 if self.target > net.MAX_TARGET:
326 from p2pool import p2p
327 raise p2p.PeerMisbehavingError('share target invalid')
329 if self.pow_hash > self.target:
330 from p2pool import p2p
331 raise p2p.PeerMisbehavingError('share PoW invalid')
333 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
336 self.time_seen = time.time()
339 return 'Share' + repr((self.net, self.peer_addr, self.contents))
342 return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
344 def iter_transaction_hash_refs(self):
345 return zip(self.share_info['transaction_hash_refs'][::2], self.share_info['transaction_hash_refs'][1::2])
347 def check(self, tracker):
348 from p2pool import p2p
349 if self.share_data['previous_share_hash'] is not None:
350 previous_share = tracker.items[self.share_data['previous_share_hash']]
351 if type(self) is type(previous_share):
353 elif type(self) is type(previous_share).SUCCESSOR:
354 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
355 from p2pool import p2p
356 raise p2p.PeerMisbehavingError('switch without enough history')
358 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
359 counts = get_desired_version_counts(tracker,
360 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
361 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
362 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
364 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
366 other_tx_hashes = [tracker.items[tracker.get_nth_parent_hash(self.hash, share_count)].share_info['new_transaction_hashes'][tx_count] for share_count, tx_count in self.iter_transaction_hash_refs()]
369 share_info, gentx, other_tx_hashes2, get_share = self.generate_transaction(
371 self.share_info['share_data'],
372 self.header['bits'].target,
373 self.share_info['timestamp'],
374 self.share_info['bits'].target,
375 self.contents['ref_merkle_link'],
376 [(h, None) for h in other_tx_hashes],
378 last_txout_nonce=self.contents['last_txout_nonce'],
382 assert other_tx_hashes2 == other_tx_hashes
384 # fixme: commented out / workaround
386 #if share_info != self.share_info:
387 # print share_info, self.share_info
388 # raise ValueError('share_info invalid')
390 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
391 raise ValueError('''gentx doesn't match hash_link''')
393 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
394 raise ValueError('merkle_link and other_tx_hashes do not match')
396 return gentx # only used by as_block
398 def get_other_tx_hashes(self, tracker):
399 parents_needed = max(share_count for share_count, tx_count in self.iter_transaction_hash_refs()) if self.share_info['transaction_hash_refs'] else 0
400 parents = tracker.get_height(self.hash) - 1
401 if parents < parents_needed:
403 last_shares = list(tracker.get_chain(self.hash, parents_needed + 1))
404 return [last_shares[share_count].share_info['new_transaction_hashes'][tx_count] for share_count, tx_count in self.iter_transaction_hash_refs()]
406 def _get_other_txs(self, tracker, known_txs):
407 other_tx_hashes = self.get_other_tx_hashes(tracker)
408 if other_tx_hashes is None:
409 return None # not all parents present
411 if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
412 return None # not all txs present
414 return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
416 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
417 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer_addr is not None:
418 return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
420 if self.pow_hash <= self.header['bits'].target:
421 return -1, 'block solution'
423 other_txs = self._get_other_txs(tracker, known_txs)
424 if other_txs is None:
425 if self.time_seen != 0: # ignore if loaded from ShareStore
426 return True, 'not all txs present'
428 all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
429 if all_txs_size > 1000000:
430 return True, 'txs over block size limit'
432 new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
433 if new_txs_size > 50000:
434 return True, 'new txs over limit'
438 def as_block(self, tracker, known_txs):
439 other_txs = self._get_other_txs(tracker, known_txs)
440 if other_txs is None:
441 return None # not all txs present
442 return dict(header=self.header, txs=[self.check(tracker)] + other_txs, signature='')
445 class WeightsSkipList(forest.TrackerSkipList):
446 # share_count, weights, total_weight
448 def get_delta(self, element):
449 from p2pool.bitcoin import data as bitcoin_data
450 share = self.tracker.items[element]
451 att = bitcoin_data.target_to_average_attempts(share.target)
452 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
454 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
455 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
457 def initial_solution(self, start, (max_shares, desired_weight)):
458 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
461 def apply_delta(self, (share_count1, weights_list, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2), (max_shares, desired_weight)):
462 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
463 assert (desired_weight - total_weight1) % 65535 == 0
464 script, = weights2.iterkeys()
465 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
466 return share_count1 + share_count2, (weights_list, new_weights), desired_weight, total_donation_weight1 + (desired_weight - total_weight1)//65535*total_donation_weight2//(total_weight2//65535)
467 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
469 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
470 if share_count > max_shares or total_weight > desired_weight:
472 elif share_count == max_shares or total_weight == desired_weight:
477 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
478 assert share_count <= max_shares and total_weight <= desired_weight
479 assert share_count == max_shares or total_weight == desired_weight
480 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
482 class OkayTracker(forest.Tracker):
483 def __init__(self, net):
484 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
485 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
486 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
489 self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
490 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
492 self.get_cumulative_weights = WeightsSkipList(self)
494 def attempt_verify(self, share):
495 if share.hash in self.verified.items:
497 height, last = self.get_height_and_last(share.hash)
498 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
499 raise AssertionError()
503 log.err(None, 'Share check failed:')
506 self.verified.add(share)
509 def think(self, block_rel_height_func, previous_block, bits, known_txs):
513 # make 'unverified heads' set?
514 # for each overall head, attempt verification
515 # if it fails, attempt on parent, and repeat
516 # if no successful verification because of lack of parents, request parent
518 for head in set(self.heads) - set(self.verified.heads):
519 head_height, last = self.get_height_and_last(head)
521 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
522 if self.attempt_verify(share):
524 if share.hash in self.heads:
529 self.items[random.choice(list(self.reverse[last]))].peer_addr,
531 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
532 min(x.target for x in self.get_chain(head, min(head_height, 5))),
535 assert bad not in self.verified.items
536 assert bad in self.heads
541 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
542 for head in list(self.verified.heads):
543 head_height, last_hash = self.verified.get_height_and_last(head)
544 last_height, last_last_hash = self.get_height_and_last(last_hash)
545 # XXX review boundary conditions
546 want = max(self.net.CHAIN_LENGTH - head_height, 0)
547 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
549 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
550 for share in self.get_chain(last_hash, get):
551 if not self.attempt_verify(share):
553 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
555 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer_addr,
557 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
558 min(x.target for x in self.get_chain(head, min(head_height, 5))),
562 decorated_tails = sorted((self.score(max(self.verified.tails[tail_hash], key=self.verified.get_work), block_rel_height_func), tail_hash) for tail_hash in self.verified.tails)
564 print len(decorated_tails), 'tails:'
565 for score, tail_hash in decorated_tails:
566 print format_hash(tail_hash), score
567 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
569 # decide best verified head
570 decorated_heads = sorted(((
571 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
572 #self.items[h].peer_addr is None,
573 -self.items[h].should_punish_reason(previous_block, bits, self, known_txs)[0],
574 -self.items[h].time_seen,
575 ), h) for h in self.verified.tails.get(best_tail, []))
577 print len(decorated_heads), 'heads. Top 10:'
578 for score, head_hash in decorated_heads[-10:]:
579 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
580 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
583 best_share = self.items[best]
584 punish, punish_reason = best_share.should_punish_reason(previous_block, bits, self, known_txs)
586 print 'Punishing share for %r! Jumping from %s to %s!' % (punish_reason, format_hash(best), format_hash(best_share.previous_hash))
587 best = best_share.previous_hash
589 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
590 target_cutoff = 2**256//(self.net.SHARE_PERIOD*best_tail_score[1] + 1) * 2 if best_tail_score[1] is not None else 2**256-1
592 timestamp_cutoff = int(time.time()) - 24*60*60
593 target_cutoff = 2**256-1
596 print 'Desire %i shares. Cutoff: %s old diff>%.2f' % (len(desired), math.format_dt(time.time() - timestamp_cutoff), bitcoin_data.target_to_difficulty(target_cutoff))
597 for peer_addr, hash, ts, targ in desired:
598 print ' ', '%s:%i' % peer_addr, format_hash(hash), math.format_dt(time.time() - ts), bitcoin_data.target_to_difficulty(targ), ts >= timestamp_cutoff, targ <= target_cutoff
600 return best, [(peer_addr, hash) for peer_addr, hash, ts, targ in desired if ts >= timestamp_cutoff], decorated_heads
602 def score(self, share_hash, block_rel_height_func):
603 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
605 head_height = self.verified.get_height(share_hash)
606 if head_height < self.net.CHAIN_LENGTH:
607 return head_height, None
609 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
611 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
612 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
614 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work/((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
616 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
618 near = tracker.items[previous_share_hash]
619 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
620 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
621 time = near.timestamp - far.timestamp
625 return attempts//time
628 def get_average_stale_prop(tracker, share_hash, lookbehind):
629 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
630 return stales/(lookbehind + stales)
632 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
634 for share in tracker.get_chain(share_hash, lookbehind - 1):
635 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
636 s = share.share_data['stale_info']
638 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
640 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
641 res = dict((k, v/dt) for k, v in res.iteritems())
644 def get_user_stale_props(tracker, share_hash, lookbehind):
646 for share in tracker.get_chain(share_hash, lookbehind - 1):
647 stale, total = res.get(share.share_data['pubkey'], (0, 0))
649 if share.share_data['stale_info'] is not None:
652 res[share.share_data['pubkey']] = stale, total
653 return dict((pubkey, stale/total) for pubkey, (stale, total) in res.iteritems())
655 def calculate_payout(weight, total_weight, subsidy):
658 payout = (subsidy - 3*minout) * weight//total_weight
665 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
667 weights, total_weight, donation_weight = tracker.get_cumulative_weights(best_share_hash, min(tracker.get_height(best_share_hash), net.REAL_CHAIN_LENGTH), 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target))
669 #res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
671 res = dict((script, calculate_payout(weight, total_weight, subsidy)) for script, weight in weights.iteritems())
672 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
676 def get_desired_version_counts(tracker, best_share_hash, dist):
678 for share in tracker.get_chain(best_share_hash, dist):
679 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
682 def get_warnings(tracker, best_share, net, bitcoind_warning, bitcoind_work_value):
685 desired_version_counts = get_desired_version_counts(tracker, best_share,
686 min(net.CHAIN_LENGTH, 60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
687 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
688 if majority_desired_version > 11 and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
689 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
690 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
691 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
693 if bitcoind_warning is not None:
694 if 'This is a pre-release test build' not in bitcoind_warning:
695 res.append('(from bitcoind) %s' % (bitcoind_warning,))
697 if time.time() > bitcoind_work_value['last_update'] + 60:
698 res.append('''LOST CONTACT WITH BITCOIND for %s! Check that it isn't frozen or dead!''' % (math.format_dt(time.time() - bitcoind_work_value['last_update']),))
705 return '%08x' % (x % 2**32)
707 class ShareStore(object):
708 def __init__(self, prefix, net):
709 self.filename = prefix
710 self.dirname = os.path.dirname(os.path.abspath(prefix))
711 self.filename = os.path.basename(os.path.abspath(prefix))
713 self.known = None # will be filename -> set of share hashes, set of verified hashes
714 self.known_desired = None
716 def get_shares(self):
717 if self.known is not None:
718 raise AssertionError()
720 filenames, next = self.get_filenames_and_next()
721 for filename in filenames:
722 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
723 with open(filename, 'rb') as f:
726 type_id_str, data_hex = line.strip().split(' ')
727 type_id = int(type_id_str)
733 verified_hash = int(data_hex, 16)
734 yield 'verified_hash', verified_hash
735 verified_hashes.add(verified_hash)
737 raw_share = share_type.unpack(data_hex.decode('hex'))
738 if raw_share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
740 share = load_share(raw_share, self.net, None)
742 share_hashes.add(share.hash)
744 raise NotImplementedError("share type %i" % (type_id,))
746 log.err(None, "HARMLESS error while reading saved shares, continuing where left off:")
748 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
750 def _add_line(self, line):
751 filenames, next = self.get_filenames_and_next()
752 if filenames and os.path.getsize(filenames[-1]) < 10e6:
753 filename = filenames[-1]
757 with open(filename, 'ab') as f:
762 def add_share(self, share):
763 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
764 if share.hash in share_hashes:
767 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
768 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
769 share_hashes.add(share.hash)
770 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
771 share_hashes.add(share.hash)
773 def add_verified_hash(self, share_hash):
774 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
775 if share_hash in verified_hashes:
778 filename = self._add_line("%i %x" % (2, share_hash))
779 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
780 verified_hashes.add(share_hash)
781 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
782 verified_hashes.add(share_hash)
784 def get_filenames_and_next(self):
785 suffixes = sorted(int(x[len(self.filename):]) for x in os.listdir(self.dirname) if x.startswith(self.filename) and x[len(self.filename):].isdigit())
786 return [os.path.join(self.dirname, self.filename + str(suffix)) for suffix in suffixes], os.path.join(self.dirname, self.filename + (str(suffixes[-1] + 1) if suffixes else str(0)))
788 def forget_share(self, share_hash):
789 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
790 if share_hash in share_hashes:
791 share_hashes.remove(share_hash)
794 def forget_verified_share(self, share_hash):
795 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
796 if share_hash in verified_hashes:
797 verified_hashes.remove(share_hash)
800 def check_remove(self):
802 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
803 #print filename, len(share_hashes) + len(verified_hashes)
804 if not share_hashes and not verified_hashes:
805 to_remove.add(filename)
806 for filename in to_remove:
807 self.known.pop(filename)
808 self.known_desired.pop(filename)
810 print "REMOVED", filename