1 from __future__ import division
9 from twisted.python import log
12 from p2pool.bitcoin import data as bitcoin_data, script, sha256
13 from p2pool.util import math, forest, pack
17 hash_link_type = pack.ComposedType([
18 ('state', pack.FixedStrType(32)),
19 ('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
20 ('length', pack.VarIntType()),
23 def prefix_to_hash_link(prefix, const_ending=''):
24 assert prefix.endswith(const_ending), (prefix, const_ending)
25 x = sha256.sha256(prefix)
26 return dict(state=x.state, extra_data=x.buf[:max(0, len(x.buf)-len(const_ending))], length=x.length//8)
28 def check_hash_link(hash_link, data, const_ending=''):
29 extra_length = hash_link['length'] % (512//8)
30 assert len(hash_link['extra_data']) == max(0, extra_length - len(const_ending))
31 extra = (hash_link['extra_data'] + const_ending)[len(hash_link['extra_data']) + len(const_ending) - extra_length:]
32 assert len(extra) == extra_length
33 return pack.IntType(256).unpack(hashlib.sha256(sha256.sha256(data, (hash_link['state'], extra, 8*hash_link['length'])).digest()).digest())
37 share_type = pack.ComposedType([
38 ('type', pack.VarIntType()),
39 ('contents', pack.VarStrType()),
42 def load_share(share, net, peer):
43 if share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
44 from p2pool import p2p
45 raise p2p.PeerMisbehavingError('sent an obsolete share')
46 elif share['type'] == Share.VERSION:
47 return Share(net, peer, Share.share_type.unpack(share['contents']))
49 raise ValueError('unknown share type: %r' % (share['type'],))
51 DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
59 small_block_header_type = pack.ComposedType([
60 ('version', pack.VarIntType()),
61 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
62 ('timestamp', pack.IntType(32)),
63 ('bits', bitcoin_data.FloatingIntegerType()),
64 ('nonce', pack.IntType(32)),
67 share_info_type = pack.ComposedType([
68 ('share_data', 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()),
78 ('new_transaction_hashes', pack.ListType(pack.IntType(256))),
79 ('transaction_hash_refs', pack.ListType(pack.VarIntType(), 2)), # pairs of share_count, tx_count
80 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
81 ('max_bits', bitcoin_data.FloatingIntegerType()),
82 ('bits', bitcoin_data.FloatingIntegerType()),
83 ('timestamp', pack.IntType(32)),
86 share_type = pack.ComposedType([
87 ('min_header', small_block_header_type),
88 ('share_info', share_info_type),
89 ('ref_merkle_link', pack.ComposedType([
90 ('branch', pack.ListType(pack.IntType(256))),
91 ('index', pack.IntType(0)),
93 ('last_txout_nonce', pack.IntType(32)),
94 ('hash_link', hash_link_type),
95 ('merkle_link', pack.ComposedType([
96 ('branch', pack.ListType(pack.IntType(256))),
97 ('index', pack.IntType(0)), # it will always be 0
101 ref_type = pack.ComposedType([
102 ('identifier', pack.FixedStrType(64//8)),
103 ('share_info', share_info_type),
106 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x24' + pack.IntType(256).pack(0) + pack.IntType(32).pack(0))[:2]
109 def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes, net, known_txs=None, last_txout_nonce=0):
110 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
112 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
113 assert height >= net.REAL_CHAIN_LENGTH or last is None
114 if height < net.TARGET_LOOKBEHIND:
115 pre_target3 = net.MAX_TARGET
117 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
118 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
119 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
120 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
121 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
122 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
124 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
125 min(height, net.REAL_CHAIN_LENGTH),
126 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
128 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
130 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
131 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
132 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
133 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
135 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
138 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
140 new_transaction_hashes = []
141 new_transaction_size = 0
142 transaction_hash_refs = []
143 other_transaction_hashes = []
145 past_shares = list(tracker.get_chain(share_data['previous_share_hash'], min(height, 100)))
147 for i, share in enumerate(past_shares):
148 for j, tx_hash in enumerate(share.new_transaction_hashes):
149 if tx_hash not in tx_hash_to_this:
150 tx_hash_to_this[tx_hash] = [1+i, j] # share_count, tx_count
151 for tx_hash in desired_other_transaction_hashes:
152 if tx_hash in tx_hash_to_this:
153 this = tx_hash_to_this[tx_hash]
155 if known_txs is not None:
156 this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
157 if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
159 new_transaction_size += this_size
160 new_transaction_hashes.append(tx_hash)
161 this = [0, len(new_transaction_hashes)-1]
162 transaction_hash_refs.extend(this)
163 other_transaction_hashes.append(tx_hash)
166 share_data=share_data,
167 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
170 timestamp=math.clip(desired_timestamp, (
171 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
172 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
173 )) if previous_share is not None else desired_timestamp,
174 new_transaction_hashes=new_transaction_hashes,
175 transaction_hash_refs=transaction_hash_refs,
181 previous_output=None,
183 script=share_data['coinbase'],
185 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
187 script='\x24' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(32).pack(last_txout_nonce),
192 def get_share(header, transactions):
193 min_header=dict(header);del min_header['merkle_root']
194 return cls(net, None, dict(
195 min_header=min_header,
196 share_info=share_info,
197 ref_merkle_link=dict(branch=[], index=0),
198 last_txout_nonce=last_txout_nonce,
199 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4-4], cls.gentx_before_refhash),
200 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
203 return share_info, gentx, other_transaction_hashes, get_share
206 def get_ref_hash(cls, net, share_info, ref_merkle_link):
207 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
208 identifier=net.IDENTIFIER,
209 share_info=share_info,
210 ))), ref_merkle_link))
212 __slots__ = 'net peer 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(' ')
214 def __init__(self, net, peer, contents):
217 self.contents = contents
219 self.min_header = contents['min_header']
220 self.share_info = contents['share_info']
221 self.hash_link = contents['hash_link']
222 self.merkle_link = contents['merkle_link']
224 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
225 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
227 if len(self.merkle_link['branch']) > 16:
228 raise ValueError('merkle branch too long!')
230 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
232 self.share_data = self.share_info['share_data']
233 self.max_target = self.share_info['max_bits'].target
234 self.target = self.share_info['bits'].target
235 self.timestamp = self.share_info['timestamp']
236 self.previous_hash = self.share_data['previous_share_hash']
237 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
238 self.desired_version = self.share_data['desired_version']
241 for share_count, tx_count in self.iter_transaction_hash_refs():
242 assert share_count < 110
245 assert n == set(range(len(self.share_info['new_transaction_hashes'])))
247 self.gentx_hash = check_hash_link(
249 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),
250 self.gentx_before_refhash,
252 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
253 self.header = dict(self.min_header, merkle_root=merkle_root)
254 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
255 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
257 if self.target > net.MAX_TARGET:
258 from p2pool import p2p
259 raise p2p.PeerMisbehavingError('share target invalid')
261 if self.pow_hash > self.target:
262 from p2pool import p2p
263 raise p2p.PeerMisbehavingError('share PoW invalid')
265 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
268 self.time_seen = time.time()
271 return 'Share' + repr((self.net, self.peer, self.contents))
274 return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
276 def iter_transaction_hash_refs(self):
277 return zip(self.share_info['transaction_hash_refs'][::2], self.share_info['transaction_hash_refs'][1::2])
279 def check(self, tracker):
280 from p2pool import p2p
281 if self.share_data['previous_share_hash'] is not None:
282 previous_share = tracker.items[self.share_data['previous_share_hash']]
283 if type(self) is type(previous_share):
285 elif type(self) is type(previous_share).SUCCESSOR:
286 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
287 from p2pool import p2p
288 raise p2p.PeerMisbehavingError('switch without enough history')
290 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
291 counts = get_desired_version_counts(tracker,
292 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
293 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
294 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
296 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
298 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()]
300 share_info, gentx, other_tx_hashes2, get_share = self.generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.share_info['bits'].target, self.contents['ref_merkle_link'], other_tx_hashes, self.net, last_txout_nonce=self.contents['last_txout_nonce'])
301 assert other_tx_hashes2 == other_tx_hashes
302 if share_info != self.share_info:
303 raise ValueError('share_info invalid')
304 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
305 raise ValueError('''gentx doesn't match hash_link''')
307 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
308 raise ValueError('merkle_link and other_tx_hashes do not match')
310 return gentx # only used by as_block
312 def get_other_tx_hashes(self, tracker):
313 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
314 parents = tracker.get_height(self.hash) - 1
315 if parents < parents_needed:
317 last_shares = list(tracker.get_chain(self.hash, parents_needed + 1))
318 return [last_shares[share_count].share_info['new_transaction_hashes'][tx_count] for share_count, tx_count in self.iter_transaction_hash_refs()]
320 def _get_other_txs(self, tracker, known_txs):
321 other_tx_hashes = self.get_other_tx_hashes(tracker)
322 if other_tx_hashes is None:
323 return None # not all parents present
325 if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
326 return None # not all txs present
328 return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
330 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
331 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer is not None:
332 return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
334 if self.pow_hash <= self.header['bits'].target:
335 return -1, 'block solution'
337 other_txs = self._get_other_txs(tracker, known_txs)
338 if other_txs is None:
339 if self.time_seen == 0: # ignore if loaded from ShareStore
340 return True, 'not all txs present'
342 all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
343 if all_txs_size > 1000000:
344 return True, 'txs over block size limit'
346 new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
347 if new_txs_size > 50000:
348 return True, 'new txs over limit'
352 def as_block(self, tracker, known_txs):
353 other_txs = self._get_other_txs(tracker, known_txs)
354 if other_txs is None:
355 return None # not all txs present
356 return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
359 class WeightsSkipList(forest.TrackerSkipList):
360 # share_count, weights, total_weight
362 def get_delta(self, element):
363 from p2pool.bitcoin import data as bitcoin_data
364 share = self.tracker.items[element]
365 att = bitcoin_data.target_to_average_attempts(share.target)
366 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
368 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
369 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
371 def initial_solution(self, start, (max_shares, desired_weight)):
372 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
375 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)):
376 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
377 assert (desired_weight - total_weight1) % 65535 == 0
378 script, = weights2.iterkeys()
379 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
380 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)
381 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
383 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
384 if share_count > max_shares or total_weight > desired_weight:
386 elif share_count == max_shares or total_weight == desired_weight:
391 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
392 assert share_count <= max_shares and total_weight <= desired_weight
393 assert share_count == max_shares or total_weight == desired_weight
394 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
396 class OkayTracker(forest.Tracker):
397 def __init__(self, net):
398 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
399 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
400 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
403 self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
404 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
406 self.get_cumulative_weights = WeightsSkipList(self)
408 def attempt_verify(self, share):
409 if share.hash in self.verified.items:
411 height, last = self.get_height_and_last(share.hash)
412 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
413 raise AssertionError()
417 log.err(None, 'Share check failed:')
420 self.verified.add(share)
423 def think(self, block_rel_height_func, previous_block, bits, known_txs):
427 # make 'unverified heads' set?
428 # for each overall head, attempt verification
429 # if it fails, attempt on parent, and repeat
430 # if no successful verification because of lack of parents, request parent
432 for head in set(self.heads) - set(self.verified.heads):
433 head_height, last = self.get_height_and_last(head)
435 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
436 if self.attempt_verify(share):
438 if share.hash in self.heads:
443 self.items[random.choice(list(self.reverse[last]))].peer,
445 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
446 min(x.target for x in self.get_chain(head, min(head_height, 5))),
449 assert bad not in self.verified.items
450 assert bad in self.heads
455 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
456 for head in list(self.verified.heads):
457 head_height, last_hash = self.verified.get_height_and_last(head)
458 last_height, last_last_hash = self.get_height_and_last(last_hash)
459 # XXX review boundary conditions
460 want = max(self.net.CHAIN_LENGTH - head_height, 0)
461 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
463 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
464 for share in self.get_chain(last_hash, get):
465 if not self.attempt_verify(share):
467 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
469 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer,
471 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
472 min(x.target for x in self.get_chain(head, min(head_height, 5))),
476 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)
478 print len(decorated_tails), 'tails:'
479 for score, tail_hash in decorated_tails:
480 print format_hash(tail_hash), score
481 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
483 # decide best verified head
484 decorated_heads = sorted(((
485 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
486 #self.items[h].peer is None,
487 -self.items[h].should_punish_reason(previous_block, bits, self, known_txs)[0],
488 -self.items[h].time_seen,
489 ), h) for h in self.verified.tails.get(best_tail, []))
491 print len(decorated_heads), 'heads. Top 10:'
492 for score, head_hash in decorated_heads[-10:]:
493 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
494 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
497 best_share = self.items[best]
498 punish, punish_reason = best_share.should_punish_reason(previous_block, bits, self, known_txs)
500 print 'Punishing share for %r! Jumping from %s to %s!' % (punish_reason, format_hash(best), format_hash(best_share.previous_hash))
501 best = best_share.previous_hash
503 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
504 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
506 timestamp_cutoff = int(time.time()) - 24*60*60
507 target_cutoff = 2**256-1
510 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))
511 for peer, hash, ts, targ in desired:
512 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
514 return best, [(peer, hash) for peer, hash, ts, targ in desired if ts >= timestamp_cutoff], decorated_heads
516 def score(self, share_hash, block_rel_height_func):
517 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
519 head_height = self.verified.get_height(share_hash)
520 if head_height < self.net.CHAIN_LENGTH:
521 return head_height, None
523 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
525 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
526 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
528 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work//((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
530 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
532 near = tracker.items[previous_share_hash]
533 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
534 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
535 time = near.timestamp - far.timestamp
539 return attempts//time
542 def get_average_stale_prop(tracker, share_hash, lookbehind):
543 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
544 return stales/(lookbehind + stales)
546 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
548 for share in tracker.get_chain(share_hash, lookbehind - 1):
549 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
550 s = share.share_data['stale_info']
552 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
554 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
555 res = dict((k, v/dt) for k, v in res.iteritems())
558 def get_user_stale_props(tracker, share_hash, lookbehind):
560 for share in tracker.get_chain(share_hash, lookbehind - 1):
561 stale, total = res.get(share.share_data['pubkey_hash'], (0, 0))
563 if share.share_data['stale_info'] is not None:
566 res[share.share_data['pubkey_hash']] = stale, total
567 return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems())
569 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
570 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))
571 res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
572 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
575 def get_desired_version_counts(tracker, best_share_hash, dist):
577 for share in tracker.get_chain(best_share_hash, dist):
578 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
581 def get_warnings(tracker, best_share, net, bitcoind_warning, bitcoind_work_value):
584 desired_version_counts = get_desired_version_counts(tracker, best_share,
585 min(net.CHAIN_LENGTH, 60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
586 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
587 if majority_desired_version > Share.VERSION and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
588 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
589 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
590 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
592 if bitcoind_warning is not None:
593 if 'This is a pre-release test build' not in bitcoind_warning:
594 res.append('(from bitcoind) %s' % (bitcoind_warning,))
596 if time.time() > bitcoind_work_value['last_update'] + 60:
597 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']),))
604 return '%08x' % (x % 2**32)
606 class ShareStore(object):
607 def __init__(self, prefix, net):
608 self.filename = prefix
609 self.dirname = os.path.dirname(os.path.abspath(prefix))
610 self.filename = os.path.basename(os.path.abspath(prefix))
612 self.known = None # will be filename -> set of share hashes, set of verified hashes
613 self.known_desired = None
615 def get_shares(self):
616 if self.known is not None:
617 raise AssertionError()
619 filenames, next = self.get_filenames_and_next()
620 for filename in filenames:
621 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
622 with open(filename, 'rb') as f:
625 type_id_str, data_hex = line.strip().split(' ')
626 type_id = int(type_id_str)
632 verified_hash = int(data_hex, 16)
633 yield 'verified_hash', verified_hash
634 verified_hashes.add(verified_hash)
636 raw_share = share_type.unpack(data_hex.decode('hex'))
637 if raw_share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
639 share = load_share(raw_share, self.net, None)
641 share_hashes.add(share.hash)
643 raise NotImplementedError("share type %i" % (type_id,))
645 log.err(None, "HARMLESS error while reading saved shares, continuing where left off:")
647 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
649 def _add_line(self, line):
650 filenames, next = self.get_filenames_and_next()
651 if filenames and os.path.getsize(filenames[-1]) < 10e6:
652 filename = filenames[-1]
656 with open(filename, 'ab') as f:
661 def add_share(self, share):
662 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
663 if share.hash in share_hashes:
666 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
667 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
668 share_hashes.add(share.hash)
669 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
670 share_hashes.add(share.hash)
672 def add_verified_hash(self, share_hash):
673 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
674 if share_hash in verified_hashes:
677 filename = self._add_line("%i %x" % (2, share_hash))
678 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
679 verified_hashes.add(share_hash)
680 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
681 verified_hashes.add(share_hash)
683 def get_filenames_and_next(self):
684 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())
685 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)))
687 def forget_share(self, share_hash):
688 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
689 if share_hash in share_hashes:
690 share_hashes.remove(share_hash)
693 def forget_verified_share(self, share_hash):
694 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
695 if share_hash in verified_hashes:
696 verified_hashes.remove(share_hash)
699 def check_remove(self):
701 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
702 #print filename, len(share_hashes) + len(verified_hashes)
703 if not share_hashes and not verified_hashes:
704 to_remove.add(filename)
705 for filename in to_remove:
706 self.known.pop(filename)
707 self.known_desired.pop(filename)
709 print "REMOVED", filename