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_addr):
43 assert isinstance(peer_addr, tuple)
44 if share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
45 from p2pool import p2p
46 raise p2p.PeerMisbehavingError('sent an obsolete share')
47 elif share['type'] == Share.VERSION:
48 return Share(net, peer_addr, Share.share_type.unpack(share['contents']))
50 raise ValueError('unknown share type: %r' % (share['type'],))
52 DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
60 small_block_header_type = pack.ComposedType([
61 ('version', pack.VarIntType()),
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_info_type = pack.ComposedType([
69 ('share_data', pack.ComposedType([
70 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
71 ('coinbase', pack.VarStrType()),
72 ('nonce', pack.IntType(32)),
73 ('pubkey_hash', pack.IntType(160)),
74 ('subsidy', pack.IntType(64)),
75 ('donation', pack.IntType(16)),
76 ('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)))),
77 ('desired_version', pack.VarIntType()),
79 ('new_transaction_hashes', pack.ListType(pack.IntType(256))),
80 ('transaction_hash_refs', pack.ListType(pack.VarIntType(), 2)), # pairs of share_count, tx_count
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_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.IntType(0)),
94 ('last_txout_nonce', pack.IntType(32)),
95 ('hash_link', hash_link_type),
96 ('merkle_link', pack.ComposedType([
97 ('branch', pack.ListType(pack.IntType(256))),
98 ('index', pack.IntType(0)), # it will always be 0
102 ref_type = pack.ComposedType([
103 ('identifier', pack.FixedStrType(64//8)),
104 ('share_info', share_info_type),
107 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]
110 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):
111 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
113 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
114 assert height >= net.REAL_CHAIN_LENGTH or last is None
115 if height < net.TARGET_LOOKBEHIND:
116 pre_target3 = net.MAX_TARGET
118 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
119 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
120 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
121 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
122 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
123 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
125 new_transaction_hashes = []
126 new_transaction_size = 0
127 transaction_hash_refs = []
128 other_transaction_hashes = []
130 past_shares = list(tracker.get_chain(share_data['previous_share_hash'], min(height, 100)))
132 for i, share in enumerate(past_shares):
133 for j, tx_hash in enumerate(share.new_transaction_hashes):
134 if tx_hash not in tx_hash_to_this:
135 tx_hash_to_this[tx_hash] = [1+i, j] # share_count, tx_count
136 for tx_hash, fee in desired_other_transaction_hashes_and_fees:
137 if tx_hash in tx_hash_to_this:
138 this = tx_hash_to_this[tx_hash]
140 if known_txs is not None:
141 this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
142 if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
144 new_transaction_size += this_size
145 new_transaction_hashes.append(tx_hash)
146 this = [0, len(new_transaction_hashes)-1]
147 transaction_hash_refs.extend(this)
148 other_transaction_hashes.append(tx_hash)
150 included_transactions = set(other_transaction_hashes)
151 removed_fees = [fee for tx_hash, fee in desired_other_transaction_hashes_and_fees if tx_hash not in included_transactions]
152 definite_fees = sum(0 if fee is None else fee for tx_hash, fee in desired_other_transaction_hashes_and_fees if tx_hash in included_transactions)
153 if None not in removed_fees:
154 share_data = dict(share_data, subsidy=share_data['subsidy'] - sum(removed_fees))
156 assert base_subsidy is not None
157 share_data = dict(share_data, subsidy=base_subsidy + definite_fees)
159 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
160 min(height, net.REAL_CHAIN_LENGTH),
161 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
163 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
165 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
166 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
167 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
168 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
170 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
173 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
176 share_data=share_data,
177 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
180 timestamp=math.clip(desired_timestamp, (
181 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
182 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
183 )) if previous_share is not None else desired_timestamp,
184 new_transaction_hashes=new_transaction_hashes,
185 transaction_hash_refs=transaction_hash_refs,
191 previous_output=None,
193 script=share_data['coinbase'],
195 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
197 script='\x24' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(32).pack(last_txout_nonce),
202 def get_share(header, last_txout_nonce=last_txout_nonce):
203 min_header = dict(header); del min_header['merkle_root']
204 share = cls(net, None, dict(
205 min_header=min_header,
206 share_info=share_info,
207 ref_merkle_link=dict(branch=[], index=0),
208 last_txout_nonce=last_txout_nonce,
209 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4-4], cls.gentx_before_refhash),
210 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
212 assert share.header == header # checks merkle_root
215 return share_info, gentx, other_transaction_hashes, get_share
218 def get_ref_hash(cls, net, share_info, ref_merkle_link):
219 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
220 identifier=net.IDENTIFIER,
221 share_info=share_info,
222 ))), ref_merkle_link))
224 __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(' ')
226 def __init__(self, net, peer_addr, contents):
228 self.peer_addr = peer_addr
229 self.contents = contents
231 self.min_header = contents['min_header']
232 self.share_info = contents['share_info']
233 self.hash_link = contents['hash_link']
234 self.merkle_link = contents['merkle_link']
236 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
237 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
239 if len(self.merkle_link['branch']) > 16:
240 raise ValueError('merkle branch too long!')
242 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
244 self.share_data = self.share_info['share_data']
245 self.max_target = self.share_info['max_bits'].target
246 self.target = self.share_info['bits'].target
247 self.timestamp = self.share_info['timestamp']
248 self.previous_hash = self.share_data['previous_share_hash']
249 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
250 self.desired_version = self.share_data['desired_version']
253 for share_count, tx_count in self.iter_transaction_hash_refs():
254 assert share_count < 110
257 assert n == set(range(len(self.share_info['new_transaction_hashes'])))
259 self.gentx_hash = check_hash_link(
261 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),
262 self.gentx_before_refhash,
264 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
265 self.header = dict(self.min_header, merkle_root=merkle_root)
266 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
267 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
269 if self.target > net.MAX_TARGET:
270 from p2pool import p2p
271 raise p2p.PeerMisbehavingError('share target invalid')
273 if self.pow_hash > self.target:
274 from p2pool import p2p
275 raise p2p.PeerMisbehavingError('share PoW invalid')
277 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
280 self.time_seen = time.time()
283 return 'Share' + repr((self.net, self.peer_addr, self.contents))
286 return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
288 def iter_transaction_hash_refs(self):
289 return zip(self.share_info['transaction_hash_refs'][::2], self.share_info['transaction_hash_refs'][1::2])
291 def check(self, tracker):
292 from p2pool import p2p
293 if self.share_data['previous_share_hash'] is not None:
294 previous_share = tracker.items[self.share_data['previous_share_hash']]
295 if type(self) is type(previous_share):
297 elif type(self) is type(previous_share).SUCCESSOR:
298 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
299 from p2pool import p2p
300 raise p2p.PeerMisbehavingError('switch without enough history')
302 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
303 counts = get_desired_version_counts(tracker,
304 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
305 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
306 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
308 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
310 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()]
312 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'], [(h, None) for h in other_tx_hashes], self.net, last_txout_nonce=self.contents['last_txout_nonce'])
313 assert other_tx_hashes2 == other_tx_hashes
314 if share_info != self.share_info:
315 raise ValueError('share_info invalid')
316 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
317 raise ValueError('''gentx doesn't match hash_link''')
319 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
320 raise ValueError('merkle_link and other_tx_hashes do not match')
322 return gentx # only used by as_block
324 def get_other_tx_hashes(self, tracker):
325 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
326 parents = tracker.get_height(self.hash) - 1
327 if parents < parents_needed:
329 last_shares = list(tracker.get_chain(self.hash, parents_needed + 1))
330 return [last_shares[share_count].share_info['new_transaction_hashes'][tx_count] for share_count, tx_count in self.iter_transaction_hash_refs()]
332 def _get_other_txs(self, tracker, known_txs):
333 other_tx_hashes = self.get_other_tx_hashes(tracker)
334 if other_tx_hashes is None:
335 return None # not all parents present
337 if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
338 return None # not all txs present
340 return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
342 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
343 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer_addr is not None:
344 return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
346 if self.pow_hash <= self.header['bits'].target:
347 return -1, 'block solution'
349 other_txs = self._get_other_txs(tracker, known_txs)
350 if other_txs is None:
351 if self.time_seen != 0: # ignore if loaded from ShareStore
352 return True, 'not all txs present'
354 all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
355 if all_txs_size > 1000000:
356 return True, 'txs over block size limit'
358 new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
359 if new_txs_size > 50000:
360 return True, 'new txs over limit'
364 def as_block(self, tracker, known_txs):
365 other_txs = self._get_other_txs(tracker, known_txs)
366 if other_txs is None:
367 return None # not all txs present
368 return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
371 class WeightsSkipList(forest.TrackerSkipList):
372 # share_count, weights, total_weight
374 def get_delta(self, element):
375 from p2pool.bitcoin import data as bitcoin_data
376 share = self.tracker.items[element]
377 att = bitcoin_data.target_to_average_attempts(share.target)
378 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
380 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
381 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
383 def initial_solution(self, start, (max_shares, desired_weight)):
384 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
387 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)):
388 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
389 assert (desired_weight - total_weight1) % 65535 == 0
390 script, = weights2.iterkeys()
391 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
392 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)
393 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
395 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
396 if share_count > max_shares or total_weight > desired_weight:
398 elif share_count == max_shares or total_weight == desired_weight:
403 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
404 assert share_count <= max_shares and total_weight <= desired_weight
405 assert share_count == max_shares or total_weight == desired_weight
406 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
408 class OkayTracker(forest.Tracker):
409 def __init__(self, net):
410 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
411 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
412 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
415 self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
416 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
418 self.get_cumulative_weights = WeightsSkipList(self)
420 def attempt_verify(self, share):
421 if share.hash in self.verified.items:
423 height, last = self.get_height_and_last(share.hash)
424 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
425 raise AssertionError()
429 log.err(None, 'Share check failed:')
432 self.verified.add(share)
435 def think(self, block_rel_height_func, previous_block, bits, known_txs):
439 # make 'unverified heads' set?
440 # for each overall head, attempt verification
441 # if it fails, attempt on parent, and repeat
442 # if no successful verification because of lack of parents, request parent
444 for head in set(self.heads) - set(self.verified.heads):
445 head_height, last = self.get_height_and_last(head)
447 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
448 if self.attempt_verify(share):
450 if share.hash in self.heads:
455 self.items[random.choice(list(self.reverse[last]))].peer_addr,
457 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
458 min(x.target for x in self.get_chain(head, min(head_height, 5))),
461 assert bad not in self.verified.items
462 assert bad in self.heads
467 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
468 for head in list(self.verified.heads):
469 head_height, last_hash = self.verified.get_height_and_last(head)
470 last_height, last_last_hash = self.get_height_and_last(last_hash)
471 # XXX review boundary conditions
472 want = max(self.net.CHAIN_LENGTH - head_height, 0)
473 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
475 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
476 for share in self.get_chain(last_hash, get):
477 if not self.attempt_verify(share):
479 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
481 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer_addr,
483 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
484 min(x.target for x in self.get_chain(head, min(head_height, 5))),
488 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)
490 print len(decorated_tails), 'tails:'
491 for score, tail_hash in decorated_tails:
492 print format_hash(tail_hash), score
493 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
495 # decide best verified head
496 decorated_heads = sorted(((
497 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
498 #self.items[h].peer_addr is None,
499 -self.items[h].should_punish_reason(previous_block, bits, self, known_txs)[0],
500 -self.items[h].time_seen,
501 ), h) for h in self.verified.tails.get(best_tail, []))
503 print len(decorated_heads), 'heads. Top 10:'
504 for score, head_hash in decorated_heads[-10:]:
505 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
506 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
509 best_share = self.items[best]
510 punish, punish_reason = best_share.should_punish_reason(previous_block, bits, self, known_txs)
512 print 'Punishing share for %r! Jumping from %s to %s!' % (punish_reason, format_hash(best), format_hash(best_share.previous_hash))
513 best = best_share.previous_hash
515 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
516 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
518 timestamp_cutoff = int(time.time()) - 24*60*60
519 target_cutoff = 2**256-1
522 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))
523 for peer_addr, hash, ts, targ in desired:
524 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
526 return best, [(peer_addr, hash) for peer_addr, hash, ts, targ in desired if ts >= timestamp_cutoff], decorated_heads
528 def score(self, share_hash, block_rel_height_func):
529 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
531 head_height = self.verified.get_height(share_hash)
532 if head_height < self.net.CHAIN_LENGTH:
533 return head_height, None
535 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
537 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
538 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
540 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work/((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
542 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
544 near = tracker.items[previous_share_hash]
545 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
546 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
547 time = near.timestamp - far.timestamp
551 return attempts//time
554 def get_average_stale_prop(tracker, share_hash, lookbehind):
555 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
556 return stales/(lookbehind + stales)
558 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
560 for share in tracker.get_chain(share_hash, lookbehind - 1):
561 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
562 s = share.share_data['stale_info']
564 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
566 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
567 res = dict((k, v/dt) for k, v in res.iteritems())
570 def get_user_stale_props(tracker, share_hash, lookbehind):
572 for share in tracker.get_chain(share_hash, lookbehind - 1):
573 stale, total = res.get(share.share_data['pubkey_hash'], (0, 0))
575 if share.share_data['stale_info'] is not None:
578 res[share.share_data['pubkey_hash']] = stale, total
579 return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems())
581 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
582 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))
583 res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
584 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
587 def get_desired_version_counts(tracker, best_share_hash, dist):
589 for share in tracker.get_chain(best_share_hash, dist):
590 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
593 def get_warnings(tracker, best_share, net, bitcoind_warning, bitcoind_work_value):
596 desired_version_counts = get_desired_version_counts(tracker, best_share,
597 min(net.CHAIN_LENGTH, 60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
598 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
599 if majority_desired_version > 11 and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
600 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
601 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
602 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
604 if bitcoind_warning is not None:
605 if 'This is a pre-release test build' not in bitcoind_warning:
606 res.append('(from bitcoind) %s' % (bitcoind_warning,))
608 if time.time() > bitcoind_work_value['last_update'] + 60:
609 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']),))
616 return '%08x' % (x % 2**32)
618 class ShareStore(object):
619 def __init__(self, prefix, net):
620 self.filename = prefix
621 self.dirname = os.path.dirname(os.path.abspath(prefix))
622 self.filename = os.path.basename(os.path.abspath(prefix))
624 self.known = None # will be filename -> set of share hashes, set of verified hashes
625 self.known_desired = None
627 def get_shares(self):
628 if self.known is not None:
629 raise AssertionError()
631 filenames, next = self.get_filenames_and_next()
632 for filename in filenames:
633 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
634 with open(filename, 'rb') as f:
637 type_id_str, data_hex = line.strip().split(' ')
638 type_id = int(type_id_str)
644 verified_hash = int(data_hex, 16)
645 yield 'verified_hash', verified_hash
646 verified_hashes.add(verified_hash)
648 raw_share = share_type.unpack(data_hex.decode('hex'))
649 if raw_share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
651 share = load_share(raw_share, self.net, None)
653 share_hashes.add(share.hash)
655 raise NotImplementedError("share type %i" % (type_id,))
657 log.err(None, "HARMLESS error while reading saved shares, continuing where left off:")
659 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
661 def _add_line(self, line):
662 filenames, next = self.get_filenames_and_next()
663 if filenames and os.path.getsize(filenames[-1]) < 10e6:
664 filename = filenames[-1]
668 with open(filename, 'ab') as f:
673 def add_share(self, share):
674 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
675 if share.hash in share_hashes:
678 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
679 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
680 share_hashes.add(share.hash)
681 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
682 share_hashes.add(share.hash)
684 def add_verified_hash(self, share_hash):
685 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
686 if share_hash in verified_hashes:
689 filename = self._add_line("%i %x" % (2, share_hash))
690 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
691 verified_hashes.add(share_hash)
692 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
693 verified_hashes.add(share_hash)
695 def get_filenames_and_next(self):
696 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())
697 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)))
699 def forget_share(self, share_hash):
700 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
701 if share_hash in share_hashes:
702 share_hashes.remove(share_hash)
705 def forget_verified_share(self, share_hash):
706 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
707 if share_hash in verified_hashes:
708 verified_hashes.remove(share_hash)
711 def check_remove(self):
713 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
714 #print filename, len(share_hashes) + len(verified_hashes)
715 if not share_hashes and not verified_hashes:
716 to_remove.add(filename)
717 for filename in to_remove:
718 self.known.pop(filename)
719 self.known_desired.pop(filename)
721 print "REMOVED", filename