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 peer_addr is None or isinstance(peer_addr, tuple)
44 if share['type'] < Share.VERSION:
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')
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)),
84 ('absheight', pack.IntType(32)),
85 ('abswork', pack.IntType(128)),
88 share_type = pack.ComposedType([
89 ('min_header', small_block_header_type),
90 ('share_info', share_info_type),
91 ('ref_merkle_link', pack.ComposedType([
92 ('branch', pack.ListType(pack.IntType(256))),
93 ('index', pack.IntType(0)),
95 ('last_txout_nonce', pack.IntType(64)),
96 ('hash_link', hash_link_type),
97 ('merkle_link', pack.ComposedType([
98 ('branch', pack.ListType(pack.IntType(256))),
99 ('index', pack.IntType(0)), # it will always be 0
103 ref_type = pack.ComposedType([
104 ('identifier', pack.FixedStrType(64//8)),
105 ('share_info', share_info_type),
108 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x6a\x28' + pack.IntType(256).pack(0) + pack.IntType(64).pack(0))[:3]
111 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):
112 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
114 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
115 assert height >= net.REAL_CHAIN_LENGTH or last is None
116 if height < net.TARGET_LOOKBEHIND:
117 pre_target3 = net.MAX_TARGET
119 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
120 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
121 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
122 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
123 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
124 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//30, pre_target3)))
126 new_transaction_hashes = []
127 new_transaction_size = 0
128 transaction_hash_refs = []
129 other_transaction_hashes = []
131 past_shares = list(tracker.get_chain(share_data['previous_share_hash'], min(height, 100)))
133 for i, share in enumerate(past_shares):
134 for j, tx_hash in enumerate(share.new_transaction_hashes):
135 if tx_hash not in tx_hash_to_this:
136 tx_hash_to_this[tx_hash] = [1+i, j] # share_count, tx_count
137 for tx_hash, fee in desired_other_transaction_hashes_and_fees:
138 if tx_hash in tx_hash_to_this:
139 this = tx_hash_to_this[tx_hash]
141 if known_txs is not None:
142 this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
143 if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
145 new_transaction_size += this_size
146 new_transaction_hashes.append(tx_hash)
147 this = [0, len(new_transaction_hashes)-1]
148 transaction_hash_refs.extend(this)
149 other_transaction_hashes.append(tx_hash)
151 included_transactions = set(other_transaction_hashes)
152 removed_fees = [fee for tx_hash, fee in desired_other_transaction_hashes_and_fees if tx_hash not in included_transactions]
153 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)
154 if None not in removed_fees:
155 share_data = dict(share_data, subsidy=share_data['subsidy'] - sum(removed_fees))
157 assert base_subsidy is not None
158 share_data = dict(share_data, subsidy=base_subsidy + definite_fees)
160 weights, total_weight, donation_weight = tracker.get_cumulative_weights(previous_share.share_data['previous_share_hash'] if previous_share is not None else None,
161 max(0, min(height, net.REAL_CHAIN_LENGTH) - 1),
162 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
164 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
166 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
167 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
168 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
169 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
171 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
174 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
177 share_data=share_data,
178 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
181 timestamp=math.clip(desired_timestamp, (
182 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
183 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
184 )) if previous_share is not None else desired_timestamp,
185 new_transaction_hashes=new_transaction_hashes,
186 transaction_hash_refs=transaction_hash_refs,
187 absheight=((previous_share.absheight if previous_share is not None else 0) + 1) % 2**32,
188 abswork=((previous_share.abswork if previous_share is not None else 0) + bitcoin_data.target_to_average_attempts(bits.target)) % 2**128,
194 previous_output=None,
196 script=share_data['coinbase'],
198 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
200 script='\x6a\x28' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(64).pack(last_txout_nonce),
205 def get_share(header, last_txout_nonce=last_txout_nonce):
206 min_header = dict(header); del min_header['merkle_root']
207 share = cls(net, None, dict(
208 min_header=min_header,
209 share_info=share_info,
210 ref_merkle_link=dict(branch=[], index=0),
211 last_txout_nonce=last_txout_nonce,
212 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-8-4], cls.gentx_before_refhash),
213 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
215 assert share.header == header # checks merkle_root
218 return share_info, gentx, other_transaction_hashes, get_share
221 def get_ref_hash(cls, net, share_info, ref_merkle_link):
222 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
223 identifier=net.IDENTIFIER,
224 share_info=share_info,
225 ))), ref_merkle_link))
227 __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 absheight abswork'.split(' ')
229 def __init__(self, net, peer_addr, contents):
231 self.peer_addr = peer_addr
232 self.contents = contents
234 self.min_header = contents['min_header']
235 self.share_info = contents['share_info']
236 self.hash_link = contents['hash_link']
237 self.merkle_link = contents['merkle_link']
239 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
240 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
242 if len(self.merkle_link['branch']) > 16:
243 raise ValueError('merkle branch too long!')
245 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
247 self.share_data = self.share_info['share_data']
248 self.max_target = self.share_info['max_bits'].target
249 self.target = self.share_info['bits'].target
250 self.timestamp = self.share_info['timestamp']
251 self.previous_hash = self.share_data['previous_share_hash']
252 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
253 self.desired_version = self.share_data['desired_version']
254 self.absheight = self.share_info['absheight']
255 self.abswork = self.share_info['abswork']
258 for share_count, tx_count in self.iter_transaction_hash_refs():
259 assert share_count < 110
262 assert n == set(range(len(self.share_info['new_transaction_hashes'])))
264 self.gentx_hash = check_hash_link(
266 self.get_ref_hash(net, self.share_info, contents['ref_merkle_link']) + pack.IntType(64).pack(self.contents['last_txout_nonce']) + pack.IntType(32).pack(0),
267 self.gentx_before_refhash,
269 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
270 self.header = dict(self.min_header, merkle_root=merkle_root)
271 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
272 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
274 if self.target > net.MAX_TARGET:
275 from p2pool import p2p
276 raise p2p.PeerMisbehavingError('share target invalid')
278 if self.pow_hash > self.target:
279 from p2pool import p2p
280 raise p2p.PeerMisbehavingError('share PoW invalid')
282 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
285 self.time_seen = time.time()
288 return 'Share' + repr((self.net, self.peer_addr, self.contents))
291 return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
293 def iter_transaction_hash_refs(self):
294 return zip(self.share_info['transaction_hash_refs'][::2], self.share_info['transaction_hash_refs'][1::2])
296 def check(self, tracker):
297 from p2pool import p2p
298 if self.share_data['previous_share_hash'] is not None:
299 previous_share = tracker.items[self.share_data['previous_share_hash']]
300 if type(self) is type(previous_share):
302 elif type(self) is type(previous_share).SUCCESSOR:
303 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
304 from p2pool import p2p
305 raise p2p.PeerMisbehavingError('switch without enough history')
307 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
308 counts = get_desired_version_counts(tracker,
309 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
310 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
311 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
313 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
315 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()]
317 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'])
318 assert other_tx_hashes2 == other_tx_hashes
319 if share_info != self.share_info:
320 raise ValueError('share_info invalid')
321 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
322 raise ValueError('''gentx doesn't match hash_link''')
324 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
325 raise ValueError('merkle_link and other_tx_hashes do not match')
327 return gentx # only used by as_block
329 def get_other_tx_hashes(self, tracker):
330 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
331 parents = tracker.get_height(self.hash) - 1
332 if parents < parents_needed:
334 last_shares = list(tracker.get_chain(self.hash, parents_needed + 1))
335 return [last_shares[share_count].share_info['new_transaction_hashes'][tx_count] for share_count, tx_count in self.iter_transaction_hash_refs()]
337 def _get_other_txs(self, tracker, known_txs):
338 other_tx_hashes = self.get_other_tx_hashes(tracker)
339 if other_tx_hashes is None:
340 return None # not all parents present
342 if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
343 return None # not all txs present
345 return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
347 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
348 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer_addr is not None:
349 return True, 'Block-stale detected! height(%x) < height(%x) or %08x != %08x' % (self.header['previous_block'], previous_block, self.header['bits'].bits, bits.bits)
351 if self.pow_hash <= self.header['bits'].target:
352 return -1, 'block solution'
354 other_txs = self._get_other_txs(tracker, known_txs)
355 if other_txs is None:
358 all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
359 if all_txs_size > 1000000:
360 return True, 'txs over block size limit'
362 new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
363 if new_txs_size > 50000:
364 return True, 'new txs over limit'
368 def as_block(self, tracker, known_txs):
369 other_txs = self._get_other_txs(tracker, known_txs)
370 if other_txs is None:
371 return None # not all txs present
372 return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
375 class WeightsSkipList(forest.TrackerSkipList):
376 # share_count, weights, total_weight
378 def get_delta(self, element):
379 from p2pool.bitcoin import data as bitcoin_data
380 share = self.tracker.items[element]
381 att = bitcoin_data.target_to_average_attempts(share.target)
382 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
384 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
385 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
387 def initial_solution(self, start, (max_shares, desired_weight)):
388 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
391 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)):
392 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
393 assert (desired_weight - total_weight1) % 65535 == 0
394 script, = weights2.iterkeys()
395 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
396 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)
397 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
399 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
400 if share_count > max_shares or total_weight > desired_weight:
402 elif share_count == max_shares or total_weight == desired_weight:
407 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
408 assert share_count <= max_shares and total_weight <= desired_weight
409 assert share_count == max_shares or total_weight == desired_weight
410 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
412 class OkayTracker(forest.Tracker):
413 def __init__(self, net):
414 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
415 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
416 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
419 self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
420 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
422 self.get_cumulative_weights = WeightsSkipList(self)
424 def attempt_verify(self, share):
425 if share.hash in self.verified.items:
427 height, last = self.get_height_and_last(share.hash)
428 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
429 raise AssertionError()
433 log.err(None, 'Share check failed:')
436 self.verified.add(share)
439 def think(self, block_rel_height_func, previous_block, bits, known_txs):
443 # make 'unverified heads' set?
444 # for each overall head, attempt verification
445 # if it fails, attempt on parent, and repeat
446 # if no successful verification because of lack of parents, request parent
448 for head in set(self.heads) - set(self.verified.heads):
449 head_height, last = self.get_height_and_last(head)
451 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
452 if self.attempt_verify(share):
454 if share.hash in self.heads:
459 self.items[random.choice(list(self.reverse[last]))].peer_addr,
461 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
462 min(x.target for x in self.get_chain(head, min(head_height, 5))),
465 assert bad not in self.verified.items
466 assert bad in self.heads
471 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
472 for head in list(self.verified.heads):
473 head_height, last_hash = self.verified.get_height_and_last(head)
474 last_height, last_last_hash = self.get_height_and_last(last_hash)
475 # XXX review boundary conditions
476 want = max(self.net.CHAIN_LENGTH - head_height, 0)
477 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
479 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
480 for share in self.get_chain(last_hash, get):
481 if not self.attempt_verify(share):
483 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
485 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer_addr,
487 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
488 min(x.target for x in self.get_chain(head, min(head_height, 5))),
492 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)
494 print len(decorated_tails), 'tails:'
495 for score, tail_hash in decorated_tails:
496 print format_hash(tail_hash), score
497 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
499 # decide best verified head
500 decorated_heads = sorted(((
501 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
502 #self.items[h].peer_addr is None,
503 -self.items[h].should_punish_reason(previous_block, bits, self, known_txs)[0],
504 -self.items[h].time_seen,
505 ), h) for h in self.verified.tails.get(best_tail, []))
507 print len(decorated_heads), 'heads. Top 10:'
508 for score, head_hash in decorated_heads[-10:]:
509 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
510 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
513 best_share = self.items[best]
514 punish, punish_reason = best_share.should_punish_reason(previous_block, bits, self, known_txs)
516 print 'Punishing share for %r! Jumping from %s to %s!' % (punish_reason, format_hash(best), format_hash(best_share.previous_hash))
517 best = best_share.previous_hash
519 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
520 target_cutoff = int(2**256//(self.net.SHARE_PERIOD*best_tail_score[1] + 1) * 2 + .5) if best_tail_score[1] is not None else 2**256-1
522 timestamp_cutoff = int(time.time()) - 24*60*60
523 target_cutoff = 2**256-1
526 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))
527 for peer_addr, hash, ts, targ in desired:
528 print ' ', None if peer_addr is None else '%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
530 return best, [(peer_addr, hash) for peer_addr, hash, ts, targ in desired if ts >= timestamp_cutoff], decorated_heads
532 def score(self, share_hash, block_rel_height_func):
533 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
535 head_height = self.verified.get_height(share_hash)
536 if head_height < self.net.CHAIN_LENGTH:
537 return head_height, None
539 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
541 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
542 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
544 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work/((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
546 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
548 near = tracker.items[previous_share_hash]
549 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
550 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
551 time = near.timestamp - far.timestamp
555 return attempts//time
558 def get_average_stale_prop(tracker, share_hash, lookbehind):
559 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
560 return stales/(lookbehind + stales)
562 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
564 for share in tracker.get_chain(share_hash, lookbehind - 1):
565 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
566 s = share.share_data['stale_info']
568 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
570 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
571 res = dict((k, v/dt) for k, v in res.iteritems())
574 def get_user_stale_props(tracker, share_hash, lookbehind):
576 for share in tracker.get_chain(share_hash, lookbehind - 1):
577 stale, total = res.get(share.share_data['pubkey_hash'], (0, 0))
579 if share.share_data['stale_info'] is not None:
582 res[share.share_data['pubkey_hash']] = stale, total
583 return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems())
585 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
586 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))
587 res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
588 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
591 def get_desired_version_counts(tracker, best_share_hash, dist):
593 for share in tracker.get_chain(best_share_hash, dist):
594 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
597 def get_warnings(tracker, best_share, net, bitcoind_getinfo, bitcoind_work_value):
600 desired_version_counts = get_desired_version_counts(tracker, best_share,
601 min(net.CHAIN_LENGTH, 60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
602 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
603 if majority_desired_version > (Share.SUCCESSOR if Share.SUCCESSOR is not None else Share).VOTING_VERSION and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
604 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
605 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
606 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
608 if bitcoind_getinfo['errors'] != '':
609 if 'This is a pre-release test build' not in bitcoind_getinfo['errors']:
610 res.append('(from bitcoind) %s' % (bitcoind_getinfo['errors'],))
612 version_warning = getattr(net, 'VERSION_WARNING', lambda v: None)(bitcoind_getinfo['version'])
613 if version_warning is not None:
614 res.append(version_warning)
616 if time.time() > bitcoind_work_value['last_update'] + 60:
617 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']),))
624 return '%08x' % (x % 2**32)
626 class ShareStore(object):
627 def __init__(self, prefix, net, share_cb, verified_hash_cb):
628 self.dirname = os.path.dirname(os.path.abspath(prefix))
629 self.filename = os.path.basename(os.path.abspath(prefix))
633 filenames, next = self.get_filenames_and_next()
634 for filename in filenames:
635 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
636 with open(filename, 'rb') as f:
639 type_id_str, data_hex = line.strip().split(' ')
640 type_id = int(type_id_str)
646 verified_hash = int(data_hex, 16)
647 verified_hash_cb(verified_hash)
648 verified_hashes.add(verified_hash)
650 raw_share = share_type.unpack(data_hex.decode('hex'))
651 if raw_share['type'] < Share.VERSION:
653 share = load_share(raw_share, self.net, None)
655 share_hashes.add(share.hash)
657 raise NotImplementedError("share type %i" % (type_id,))
659 log.err(None, "HARMLESS error while reading saved shares, continuing where left off:")
661 self.known = known # filename -> (set of share hashes, set of verified hashes)
662 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
664 def _add_line(self, line):
665 filenames, next = self.get_filenames_and_next()
666 if filenames and os.path.getsize(filenames[-1]) < 10e6:
667 filename = filenames[-1]
671 with open(filename, 'ab') as f:
676 def add_share(self, share):
677 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
678 if share.hash in share_hashes:
681 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
682 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
683 share_hashes.add(share.hash)
684 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
685 share_hashes.add(share.hash)
687 def add_verified_hash(self, share_hash):
688 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
689 if share_hash in verified_hashes:
692 filename = self._add_line("%i %x" % (2, share_hash))
693 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
694 verified_hashes.add(share_hash)
695 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
696 verified_hashes.add(share_hash)
698 def get_filenames_and_next(self):
699 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())
700 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)))
702 def forget_share(self, share_hash):
703 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
704 if share_hash in share_hashes:
705 share_hashes.remove(share_hash)
708 def forget_verified_share(self, share_hash):
709 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
710 if share_hash in verified_hashes:
711 verified_hashes.remove(share_hash)
714 def check_remove(self):
716 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
717 #print filename, len(share_hashes) + len(verified_hashes)
718 if not share_hashes and not verified_hashes:
719 to_remove.add(filename)
720 for filename in to_remove:
721 self.known.pop(filename)
722 self.known_desired.pop(filename)
724 print "REMOVED", filename