1 from __future__ import division
8 from twisted.python import log
11 from p2pool.bitcoin import data as bitcoin_data, script, sha256
12 from p2pool.util import math, forest, pack
16 hash_link_type = pack.ComposedType([
17 ('state', pack.FixedStrType(32)),
18 ('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
19 ('length', pack.VarIntType()),
22 def prefix_to_hash_link(prefix, const_ending=''):
23 assert prefix.endswith(const_ending), (prefix, const_ending)
24 x = sha256.sha256(prefix)
25 return dict(state=x.state, extra_data=x.buf[:max(0, len(x.buf)-len(const_ending))], length=x.length//8)
27 def check_hash_link(hash_link, data, const_ending=''):
28 extra_length = hash_link['length'] % (512//8)
29 assert len(hash_link['extra_data']) == max(0, extra_length - len(const_ending))
30 extra = (hash_link['extra_data'] + const_ending)[len(hash_link['extra_data']) + len(const_ending) - extra_length:]
31 assert len(extra) == extra_length
32 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):
46 if share['type'] in [0, 1, 2, 3]:
47 from p2pool import p2p
48 raise p2p.PeerMisbehavingError('sent an obsolete share')
49 elif share['type'] == 4:
50 return Share(net, peer, other_txs=None, **Share.share1a_type.unpack(share['contents']))
51 elif share['type'] == 5:
52 share1b = Share.share1b_type.unpack(share['contents'])
53 return Share(net, peer, merkle_link=bitcoin_data.calculate_merkle_link([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in share1b['other_txs']], 0), **share1b)
55 raise ValueError('unknown share type: %r' % (share['type'],))
57 DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
60 small_block_header_type = pack.ComposedType([
61 ('version', pack.VarIntType()), # XXX must be constrained to 32 bits
62 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
63 ('timestamp', pack.IntType(32)),
64 ('bits', bitcoin_data.FloatingIntegerType()),
65 ('nonce', pack.IntType(32)),
68 share_data_type = pack.ComposedType([
69 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
70 ('coinbase', pack.VarStrType()),
71 ('nonce', pack.IntType(32)),
72 ('pubkey_hash', pack.IntType(160)),
73 ('subsidy', pack.IntType(64)),
74 ('donation', pack.IntType(16)),
75 ('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)))),
76 ('desired_version', pack.VarIntType()),
79 share_info_type = pack.ComposedType([
80 ('share_data', share_data_type),
81 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
82 ('max_bits', bitcoin_data.FloatingIntegerType()),
83 ('bits', bitcoin_data.FloatingIntegerType()),
84 ('timestamp', pack.IntType(32)),
87 share_common_type = pack.ComposedType([
88 ('min_header', small_block_header_type),
89 ('share_info', share_info_type),
90 ('ref_merkle_link', pack.ComposedType([
91 ('branch', pack.ListType(pack.IntType(256))),
92 ('index', pack.VarIntType()),
94 ('hash_link', hash_link_type),
96 share1a_type = pack.ComposedType([
97 ('common', share_common_type),
98 ('merkle_link', pack.ComposedType([
99 ('branch', pack.ListType(pack.IntType(256))),
100 ('index', pack.IntType(0)), # it will always be 0
103 share1b_type = pack.ComposedType([
104 ('common', share_common_type),
105 ('other_txs', pack.ListType(bitcoin_data.tx_type)),
108 ref_type = pack.ComposedType([
109 ('identifier', pack.FixedStrType(64//8)),
110 ('share_info', share_info_type),
113 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x20' + pack.IntType(256).pack(0))[:2]
116 def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, net):
117 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
119 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
120 assert height >= net.REAL_CHAIN_LENGTH or last is None
121 if height < net.TARGET_LOOKBEHIND:
122 pre_target3 = net.MAX_TARGET
124 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
125 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
126 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
127 pre_target3 = math.clip(pre_target2, (0, net.MAX_TARGET))
128 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
129 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
131 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
132 min(height, net.REAL_CHAIN_LENGTH),
133 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
135 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
137 amounts = dict((script, share_data['subsidy']*(199*weight)//(200*total_weight)) for script, weight in weights.iteritems()) # 99.5% goes according to weights prior to this share
138 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
139 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
140 amounts[DONATION_SCRIPT] = amounts.get(DONATION_SCRIPT, 0) + share_data['subsidy'] - sum(amounts.itervalues()) # all that's left over is the donation weight and some extra satoshis due to rounding
142 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
145 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
148 share_data=share_data,
149 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
152 timestamp=math.clip(desired_timestamp, (
153 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
154 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
155 )) if previous_share is not None else desired_timestamp,
158 return share_info, dict(
161 previous_output=None,
163 script=share_data['coinbase'].ljust(2, '\x00'),
165 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
167 script='\x20' + cls.get_ref_hash(net, share_info, ref_merkle_link),
173 def get_ref_hash(cls, net, share_info, ref_merkle_link):
174 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
175 identifier=net.IDENTIFIER,
176 share_info=share_info,
177 ))), ref_merkle_link))
179 __slots__ = 'net peer common min_header share_info hash_link merkle_link other_txs hash share_data max_target target timestamp previous_hash new_script desired_version gentx_hash header pow_hash header_hash time_seen'.split(' ')
181 def __init__(self, net, peer, common, merkle_link, other_txs):
185 self.min_header = common['min_header']
186 self.share_info = common['share_info']
187 self.hash_link = common['hash_link']
188 self.merkle_link = merkle_link
189 self.other_txs = other_txs
191 if len(self.share_info['share_data']['coinbase']) > 100:
192 raise ValueError('''coinbase too large! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
194 if len(merkle_link['branch']) > 16:
195 raise ValueError('merkle branch too long!')
197 if p2pool.DEBUG and other_txs is not None and bitcoin_data.calculate_merkle_link([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in other_txs], 0) != merkle_link:
198 raise ValueError('merkle_link and other_txs do not match')
200 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
202 self.share_data = self.share_info['share_data']
203 self.max_target = self.share_info['max_bits'].target
204 self.target = self.share_info['bits'].target
205 self.timestamp = self.share_info['timestamp']
206 self.previous_hash = self.share_data['previous_share_hash']
207 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
208 self.desired_version = self.share_data['desired_version']
210 self.gentx_hash = check_hash_link(
212 self.get_ref_hash(net, self.share_info, common['ref_merkle_link']) + pack.IntType(32).pack(0),
213 self.gentx_before_refhash,
215 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, merkle_link)
216 self.header = dict(self.min_header, merkle_root=merkle_root)
217 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
218 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
220 if self.pow_hash > self.target:
221 from p2pool import p2p
222 raise p2p.PeerMisbehavingError('share PoW invalid')
224 if other_txs is not None and not self.pow_hash <= self.header['bits'].target:
225 raise ValueError('other_txs provided when not a block solution')
226 if other_txs is None and self.pow_hash <= self.header['bits'].target:
227 raise ValueError('other_txs not provided when a block solution')
230 self.time_seen = time.time()
233 return '<Share %s>' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),)
236 if not self.pow_hash <= self.header['bits'].target: # share1a
237 return dict(type=4, contents=self.share1a_type.pack(dict(common=self.common, merkle_link=self.merkle_link)))
239 return dict(type=5, contents=self.share1b_type.pack(dict(common=self.common, other_txs=self.other_txs)))
241 def check(self, tracker):
242 share_info, gentx = self.generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.share_info['bits'].target, self.common['ref_merkle_link'], self.net)
243 if share_info != self.share_info:
244 raise ValueError('share_info invalid')
245 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
246 raise ValueError('''gentx doesn't match hash_link''')
247 return gentx # only used by as_block
249 def as_block(self, tracker):
250 if self.other_txs is None:
251 raise ValueError('share does not contain all txs')
252 return dict(header=self.header, txs=[self.check(tracker)] + self.other_txs)
254 class WeightsSkipList(forest.TrackerSkipList):
255 # share_count, weights, total_weight
257 def get_delta(self, element):
258 from p2pool.bitcoin import data as bitcoin_data
259 share = self.tracker.items[element]
260 att = bitcoin_data.target_to_average_attempts(share.target)
261 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
263 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
264 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
266 def initial_solution(self, start, (max_shares, desired_weight)):
267 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
270 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)):
271 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
272 assert (desired_weight - total_weight1) % 65535 == 0
273 script, = weights2.iterkeys()
274 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
275 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)
276 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
278 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
279 if share_count > max_shares or total_weight > desired_weight:
281 elif share_count == max_shares or total_weight == desired_weight:
286 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
287 assert share_count <= max_shares and total_weight <= desired_weight
288 assert share_count == max_shares or total_weight == desired_weight
289 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
291 class OkayTracker(forest.Tracker):
292 def __init__(self, net, my_share_hashes, my_doa_share_hashes):
293 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
294 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
295 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
298 self.verified = forest.Tracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
299 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
300 my_count=lambda share: 1 if share.hash in my_share_hashes else 0,
301 my_doa_count=lambda share: 1 if share.hash in my_doa_share_hashes else 0,
302 my_orphan_announce_count=lambda share: 1 if share.hash in my_share_hashes and share.share_data['stale_info'] == 'orphan' else 0,
303 my_dead_announce_count=lambda share: 1 if share.hash in my_share_hashes and share.share_data['stale_info'] == 'doa' else 0,
305 self.get_cumulative_weights = WeightsSkipList(self)
307 def attempt_verify(self, share):
308 if share.hash in self.verified.items:
310 height, last = self.get_height_and_last(share.hash)
311 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
312 raise AssertionError()
316 log.err(None, 'Share check failed:')
319 self.verified.add(share)
322 def think(self, block_rel_height_func, previous_block, bits):
326 # make 'unverified heads' set?
327 # for each overall head, attempt verification
328 # if it fails, attempt on parent, and repeat
329 # if no successful verification because of lack of parents, request parent
331 for head in set(self.heads) - set(self.verified.heads):
332 head_height, last = self.get_height_and_last(head)
334 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
335 if self.attempt_verify(share):
337 if share.hash in self.heads:
342 self.items[random.choice(list(self.reverse[last]))].peer,
344 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
345 min(x.target for x in self.get_chain(head, min(head_height, 5))),
348 assert bad not in self.verified.items
349 assert bad in self.heads
354 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
355 for head in list(self.verified.heads):
356 head_height, last_hash = self.verified.get_height_and_last(head)
357 last_height, last_last_hash = self.get_height_and_last(last_hash)
358 # XXX review boundary conditions
359 want = max(self.net.CHAIN_LENGTH - head_height, 0)
360 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
362 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
363 for share in self.get_chain(last_hash, get):
364 if not self.attempt_verify(share):
366 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
368 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer,
370 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
371 min(x.target for x in self.get_chain(head, min(head_height, 5))),
375 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)
377 print len(decorated_tails), 'tails:'
378 for score, tail_hash in decorated_tails:
379 print format_hash(tail_hash), score
380 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
382 # decide best verified head
383 decorated_heads = sorted(((
384 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
385 #self.items[h].peer is None,
386 self.items[h].pow_hash <= self.items[h].header['bits'].target, # is block solution
387 (self.items[h].header['previous_block'], self.items[h].header['bits']) == (previous_block, bits) or self.items[h].peer is None,
388 -self.items[h].time_seen,
389 ), h) for h in self.verified.tails.get(best_tail, []))
391 print len(decorated_heads), 'heads. Top 10:'
392 for score, head_hash in decorated_heads[-10:]:
393 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
394 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
398 for i in xrange(1000):
400 for share_hash, tail in self.heads.iteritems():
401 if share_hash in [head_hash for score, head_hash in decorated_heads[-5:]]:
404 if self.items[share_hash].time_seen > time.time() - 300:
407 if share_hash not in self.verified.items and max(self.items[after_tail_hash].time_seen for after_tail_hash in self.reverse.get(tail)) > time.time() - 120: # XXX stupid
410 to_remove.add(share_hash)
413 for share_hash in to_remove:
414 if share_hash in self.verified.items:
415 self.verified.remove(share_hash)
416 self.remove(share_hash)
417 #print "_________", to_remove
420 for i in xrange(1000):
422 for tail, heads in self.tails.iteritems():
423 if min(self.get_height(head) for head in heads) < 2*self.net.CHAIN_LENGTH + 10:
425 for aftertail in self.reverse.get(tail, set()):
426 if len(self.reverse[self.items[aftertail].previous_hash]) > 1: # XXX
429 to_remove.add(aftertail)
432 # if removed from this, it must be removed from verified
434 for aftertail in to_remove:
435 if self.items[aftertail].previous_hash not in self.tails:
436 print "erk", aftertail, self.items[aftertail].previous_hash
438 if aftertail in self.verified.items:
439 self.verified.remove(aftertail)
440 self.remove(aftertail)
442 #print "removed! %i %f" % (len(to_remove), (end - start)/len(to_remove))
445 best_share = self.items[best]
446 if (best_share.header['previous_block'], best_share.header['bits']) != (previous_block, bits) and best_share.header_hash != previous_block and best_share.peer is not None:
448 print 'Stale detected! %x < %x' % (best_share.header['previous_block'], previous_block)
449 best = best_share.previous_hash
451 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
452 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
454 timestamp_cutoff = int(time.time()) - 24*60*60
455 target_cutoff = 2**256-1
458 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))
459 for peer, hash, ts, targ in desired:
460 print ' ', '%s:%i' % peer.addr if peer is not None else None, format_hash(hash), math.format_dt(time.time() - ts), bitcoin_data.target_to_difficulty(targ), ts >= timestamp_cutoff, targ <= target_cutoff
462 return best, [(peer, hash) for peer, hash, ts, targ in desired if ts >= timestamp_cutoff]
464 def score(self, share_hash, block_rel_height_func):
465 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
467 head_height = self.verified.get_height(share_hash)
468 if head_height < self.net.CHAIN_LENGTH:
469 return head_height, None
471 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
473 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
474 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
476 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work//((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
478 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
480 near = tracker.items[previous_share_hash]
481 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
482 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
483 time = near.timestamp - far.timestamp
487 return attempts//time
490 def get_average_stale_prop(tracker, share_hash, lookbehind):
491 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
492 return stales/(lookbehind + stales)
494 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
496 for share in tracker.get_chain(share_hash, lookbehind - 1):
497 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
498 s = share.share_data['stale_info']
500 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
502 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
503 res = dict((k, v/dt) for k, v in res.iteritems())
506 def get_user_stale_props(tracker, share_hash, lookbehind):
508 for share in tracker.get_chain(share_hash, lookbehind - 1):
509 stale, total = res.get(share.share_data['pubkey_hash'], (0, 0))
511 if share.share_data['stale_info'] is not None:
514 res[share.share_data['pubkey_hash']] = stale, total
515 return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems())
517 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
518 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))
519 res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
520 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
523 def get_desired_version_counts(tracker, best_share_hash, dist):
525 for share in tracker.get_chain(best_share_hash, dist):
526 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
529 def get_warnings(tracker, best_share, net):
532 desired_version_counts = get_desired_version_counts(tracker, best_share,
533 min(60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
534 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
535 if majority_desired_version not in [0, 1, 2, 3] and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
536 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
537 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
538 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
545 return '%08x' % (x % 2**32)
547 class ShareStore(object):
548 def __init__(self, prefix, net):
549 self.filename = prefix
550 self.dirname = os.path.dirname(os.path.abspath(prefix))
551 self.filename = os.path.basename(os.path.abspath(prefix))
553 self.known = None # will be filename -> set of share hashes, set of verified hashes
554 self.known_desired = None
556 def get_shares(self):
557 if self.known is not None:
558 raise AssertionError()
560 filenames, next = self.get_filenames_and_next()
561 for filename in filenames:
562 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
563 with open(filename, 'rb') as f:
566 type_id_str, data_hex = line.strip().split(' ')
567 type_id = int(type_id_str)
573 verified_hash = int(data_hex, 16)
574 yield 'verified_hash', verified_hash
575 verified_hashes.add(verified_hash)
577 raw_share = share_type.unpack(data_hex.decode('hex'))
578 if raw_share['type'] in [0, 1, 2, 3, 6, 7]:
580 share = load_share(raw_share, self.net, None)
582 share_hashes.add(share.hash)
584 raise NotImplementedError("share type %i" % (type_id,))
586 log.err(None, "Error while reading saved shares, continuing where left off:")
588 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
590 def _add_line(self, line):
591 filenames, next = self.get_filenames_and_next()
592 if filenames and os.path.getsize(filenames[-1]) < 10e6:
593 filename = filenames[-1]
597 with open(filename, 'ab') as f:
602 def add_share(self, share):
603 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
604 if share.hash in share_hashes:
607 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
608 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
609 share_hashes.add(share.hash)
610 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
611 share_hashes.add(share.hash)
613 def add_verified_hash(self, share_hash):
614 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
615 if share_hash in verified_hashes:
618 filename = self._add_line("%i %x" % (2, share_hash))
619 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
620 verified_hashes.add(share_hash)
621 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
622 verified_hashes.add(share_hash)
624 def get_filenames_and_next(self):
625 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())
626 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)))
628 def forget_share(self, share_hash):
629 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
630 if share_hash in share_hashes:
631 share_hashes.remove(share_hash)
634 def forget_verified_share(self, share_hash):
635 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
636 if share_hash in verified_hashes:
637 verified_hashes.remove(share_hash)
640 def check_remove(self):
642 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
643 #print filename, len(share_hashes) + len(verified_hashes)
644 if not share_hashes and not verified_hashes:
645 to_remove.add(filename)
646 for filename in to_remove:
647 self.known.pop(filename)
648 self.known_desired.pop(filename)
650 print "REMOVED", filename