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.ComposedType([ # compressed by referencing previous shares' hashes
80 ('share_count', pack.VarIntType()),
81 ('tx_count', pack.VarIntType()),
83 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
84 ('max_bits', bitcoin_data.FloatingIntegerType()),
85 ('bits', bitcoin_data.FloatingIntegerType()),
86 ('timestamp', pack.IntType(32)),
89 share_type = pack.ComposedType([
90 ('min_header', small_block_header_type),
91 ('share_info', share_info_type),
92 ('ref_merkle_link', pack.ComposedType([
93 ('branch', pack.ListType(pack.IntType(256))),
94 ('index', pack.IntType(0)),
96 ('last_txout_nonce', pack.IntType(32)),
97 ('hash_link', hash_link_type),
98 ('merkle_link', pack.ComposedType([
99 ('branch', pack.ListType(pack.IntType(256))),
100 ('index', pack.IntType(0)), # it will always be 0
104 ref_type = pack.ComposedType([
105 ('identifier', pack.FixedStrType(64//8)),
106 ('share_info', share_info_type),
109 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]
112 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):
113 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
115 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
116 assert height >= net.REAL_CHAIN_LENGTH or last is None
117 if height < net.TARGET_LOOKBEHIND:
118 pre_target3 = net.MAX_TARGET
120 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
121 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
122 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
123 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
124 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
125 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
127 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
128 min(height, net.REAL_CHAIN_LENGTH),
129 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
131 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
133 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
134 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
135 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
136 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
138 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
141 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
143 new_transaction_hashes = []
144 new_transaction_size = 0
145 transaction_hash_refs = []
146 other_transaction_hashes = []
148 for tx_hash in desired_other_transaction_hashes:
149 for i, share in enumerate(tracker.get_chain(share_data['previous_share_hash'], min(height, 100))):
150 if tx_hash in share.new_transaction_hashes:
151 this = dict(share_count=i+1, tx_count=share.new_transaction_hashes.index(tx_hash))
154 if known_txs is not None:
155 this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
156 if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
158 new_transaction_size += this_size
159 new_transaction_hashes.append(tx_hash)
160 this = dict(share_count=0, tx_count=len(new_transaction_hashes)-1)
161 transaction_hash_refs.append(this)
162 other_transaction_hashes.append(tx_hash)
165 share_data=share_data,
166 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
169 timestamp=math.clip(desired_timestamp, (
170 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
171 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
172 )) if previous_share is not None else desired_timestamp,
173 new_transaction_hashes=new_transaction_hashes,
174 transaction_hash_refs=transaction_hash_refs,
180 previous_output=None,
182 script=share_data['coinbase'],
184 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
186 script='\x24' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(32).pack(last_txout_nonce),
191 def get_share(header, transactions):
192 min_header=dict(header);del min_header['merkle_root']
193 return cls(net, None, dict(
194 min_header=min_header,
195 share_info=share_info,
196 ref_merkle_link=dict(branch=[], index=0),
197 last_txout_nonce=last_txout_nonce,
198 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4-4], cls.gentx_before_refhash),
199 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
202 return share_info, gentx, other_transaction_hashes, get_share
205 def get_ref_hash(cls, net, share_info, ref_merkle_link):
206 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
207 identifier=net.IDENTIFIER,
208 share_info=share_info,
209 ))), ref_merkle_link))
211 __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(' ')
213 def __init__(self, net, peer, contents):
216 self.contents = contents
218 self.min_header = contents['min_header']
219 self.share_info = contents['share_info']
220 self.hash_link = contents['hash_link']
221 self.merkle_link = contents['merkle_link']
223 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
224 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
226 if len(self.merkle_link['branch']) > 16:
227 raise ValueError('merkle branch too long!')
229 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
231 self.share_data = self.share_info['share_data']
232 self.max_target = self.share_info['max_bits'].target
233 self.target = self.share_info['bits'].target
234 self.timestamp = self.share_info['timestamp']
235 self.previous_hash = self.share_data['previous_share_hash']
236 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
237 self.desired_version = self.share_data['desired_version']
239 for x in self.share_info['transaction_hash_refs']:
240 assert x['share_count'] < 110
241 for i, x in enumerate(self.share_info['new_transaction_hashes']):
242 assert dict(share_count=0, tx_count=i) in self.share_info['transaction_hash_refs']
244 self.gentx_hash = check_hash_link(
246 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),
247 self.gentx_before_refhash,
249 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
250 self.header = dict(self.min_header, merkle_root=merkle_root)
251 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
252 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
254 if self.target > net.MAX_TARGET:
255 from p2pool import p2p
256 raise p2p.PeerMisbehavingError('share target invalid')
258 if self.pow_hash > self.target:
259 from p2pool import p2p
260 raise p2p.PeerMisbehavingError('share PoW invalid')
262 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
265 self.time_seen = time.time()
268 return 'Share' + repr((self.net, self.peer, self.contents))
271 return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
273 def check(self, tracker):
274 from p2pool import p2p
275 if self.share_data['previous_share_hash'] is not None:
276 previous_share = tracker.items[self.share_data['previous_share_hash']]
277 if type(self) is type(previous_share):
279 elif type(self) is type(previous_share).SUCCESSOR:
280 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
281 from p2pool import p2p
282 raise p2p.PeerMisbehavingError('switch without enough history')
284 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
285 counts = get_desired_version_counts(tracker,
286 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
287 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
288 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
290 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
292 other_tx_hashes = [tracker.items[tracker.get_nth_parent_hash(self.hash, x['share_count'])].share_info['new_transaction_hashes'][x['tx_count']] for x in self.share_info['transaction_hash_refs']]
294 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'])
295 assert other_tx_hashes2 == other_tx_hashes
296 if share_info != self.share_info:
297 raise ValueError('share_info invalid')
298 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
299 raise ValueError('''gentx doesn't match hash_link''')
301 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
302 raise ValueError('merkle_link and other_tx_hashes do not match')
304 return gentx # only used by as_block
306 def get_other_tx_hashes(self, tracker):
307 parents = tracker.get_height(self.hash) - 1
308 if not all(x['share_count'] <= parents for x in self.share_info['transaction_hash_refs']):
310 return [tracker.items[tracker.get_nth_parent_hash(self.hash, x['share_count'])].share_info['new_transaction_hashes'][x['tx_count']] for x in self.share_info['transaction_hash_refs']]
312 def _get_other_txs(self, tracker, known_txs):
313 other_tx_hashes = self.get_other_tx_hashes(tracker)
314 if other_tx_hashes is None:
315 return None # not all parents present
317 if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
318 return None # not all txs present
320 return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
322 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
323 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer is not None:
324 return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
326 if self.pow_hash <= self.header['bits'].target:
327 return -1, 'block solution'
329 other_txs = self._get_other_txs(tracker, known_txs)
330 if other_txs is None:
331 if self.time_seen is not None: # ignore if loaded from ShareStore
332 return True, 'not all txs present'
334 all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
335 if all_txs_size > 1000000:
336 return True, 'txs over block size limit'
338 new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
339 if new_txs_size > 50000:
340 return True, 'new txs over limit'
344 def as_block(self, tracker, known_txs):
345 other_txs = self._get_other_txs(tracker, known_txs)
346 if other_txs is None:
347 return None # not all txs present
348 return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
351 class WeightsSkipList(forest.TrackerSkipList):
352 # share_count, weights, total_weight
354 def get_delta(self, element):
355 from p2pool.bitcoin import data as bitcoin_data
356 share = self.tracker.items[element]
357 att = bitcoin_data.target_to_average_attempts(share.target)
358 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
360 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
361 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
363 def initial_solution(self, start, (max_shares, desired_weight)):
364 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
367 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)):
368 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
369 assert (desired_weight - total_weight1) % 65535 == 0
370 script, = weights2.iterkeys()
371 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
372 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)
373 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
375 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
376 if share_count > max_shares or total_weight > desired_weight:
378 elif share_count == max_shares or total_weight == desired_weight:
383 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
384 assert share_count <= max_shares and total_weight <= desired_weight
385 assert share_count == max_shares or total_weight == desired_weight
386 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
388 class OkayTracker(forest.Tracker):
389 def __init__(self, net):
390 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
391 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
392 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
395 self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
396 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
398 self.get_cumulative_weights = WeightsSkipList(self)
400 def attempt_verify(self, share):
401 if share.hash in self.verified.items:
403 height, last = self.get_height_and_last(share.hash)
404 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
405 raise AssertionError()
409 log.err(None, 'Share check failed:')
412 self.verified.add(share)
415 def think(self, block_rel_height_func, previous_block, bits, known_txs):
419 # make 'unverified heads' set?
420 # for each overall head, attempt verification
421 # if it fails, attempt on parent, and repeat
422 # if no successful verification because of lack of parents, request parent
424 for head in set(self.heads) - set(self.verified.heads):
425 head_height, last = self.get_height_and_last(head)
427 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
428 if self.attempt_verify(share):
430 if share.hash in self.heads:
435 self.items[random.choice(list(self.reverse[last]))].peer,
437 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
438 min(x.target for x in self.get_chain(head, min(head_height, 5))),
441 assert bad not in self.verified.items
442 assert bad in self.heads
447 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
448 for head in list(self.verified.heads):
449 head_height, last_hash = self.verified.get_height_and_last(head)
450 last_height, last_last_hash = self.get_height_and_last(last_hash)
451 # XXX review boundary conditions
452 want = max(self.net.CHAIN_LENGTH - head_height, 0)
453 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
455 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
456 for share in self.get_chain(last_hash, get):
457 if not self.attempt_verify(share):
459 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
461 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer,
463 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
464 min(x.target for x in self.get_chain(head, min(head_height, 5))),
468 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)
470 print len(decorated_tails), 'tails:'
471 for score, tail_hash in decorated_tails:
472 print format_hash(tail_hash), score
473 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
475 # decide best verified head
476 decorated_heads = sorted(((
477 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
478 #self.items[h].peer is None,
479 -self.items[h].should_punish_reason(previous_block, bits, self, known_txs)[0],
480 -self.items[h].time_seen,
481 ), h) for h in self.verified.tails.get(best_tail, []))
483 print len(decorated_heads), 'heads. Top 10:'
484 for score, head_hash in decorated_heads[-10:]:
485 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
486 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
489 best_share = self.items[best]
490 punish, punish_reason = best_share.should_punish_reason(previous_block, bits, self, known_txs)
492 print 'Punishing share for %r! Jumping from %s to %s!' % (punish_reason, format_hash(best), format_hash(best_share.previous_hash))
493 best = best_share.previous_hash
495 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
496 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
498 timestamp_cutoff = int(time.time()) - 24*60*60
499 target_cutoff = 2**256-1
502 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))
503 for peer, hash, ts, targ in desired:
504 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
506 return best, [(peer, hash) for peer, hash, ts, targ in desired if ts >= timestamp_cutoff], decorated_heads
508 def score(self, share_hash, block_rel_height_func):
509 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
511 head_height = self.verified.get_height(share_hash)
512 if head_height < self.net.CHAIN_LENGTH:
513 return head_height, None
515 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
517 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
518 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
520 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work//((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
522 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
524 near = tracker.items[previous_share_hash]
525 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
526 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
527 time = near.timestamp - far.timestamp
531 return attempts//time
534 def get_average_stale_prop(tracker, share_hash, lookbehind):
535 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
536 return stales/(lookbehind + stales)
538 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
540 for share in tracker.get_chain(share_hash, lookbehind - 1):
541 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
542 s = share.share_data['stale_info']
544 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
546 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
547 res = dict((k, v/dt) for k, v in res.iteritems())
550 def get_user_stale_props(tracker, share_hash, lookbehind):
552 for share in tracker.get_chain(share_hash, lookbehind - 1):
553 stale, total = res.get(share.share_data['pubkey_hash'], (0, 0))
555 if share.share_data['stale_info'] is not None:
558 res[share.share_data['pubkey_hash']] = stale, total
559 return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems())
561 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
562 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))
563 res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
564 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
567 def get_desired_version_counts(tracker, best_share_hash, dist):
569 for share in tracker.get_chain(best_share_hash, dist):
570 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
573 def get_warnings(tracker, best_share, net, bitcoind_warning, bitcoind_work_value):
576 desired_version_counts = get_desired_version_counts(tracker, best_share,
577 min(net.CHAIN_LENGTH, 60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
578 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
579 if majority_desired_version > Share.VERSION and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
580 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
581 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
582 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
584 if bitcoind_warning is not None:
585 if 'This is a pre-release test build' not in bitcoind_warning:
586 res.append('(from bitcoind) %s' % (bitcoind_warning,))
588 if time.time() > bitcoind_work_value['last_update'] + 60:
589 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']),))
596 return '%08x' % (x % 2**32)
598 class ShareStore(object):
599 def __init__(self, prefix, net):
600 self.filename = prefix
601 self.dirname = os.path.dirname(os.path.abspath(prefix))
602 self.filename = os.path.basename(os.path.abspath(prefix))
604 self.known = None # will be filename -> set of share hashes, set of verified hashes
605 self.known_desired = None
607 def get_shares(self):
608 if self.known is not None:
609 raise AssertionError()
611 filenames, next = self.get_filenames_and_next()
612 for filename in filenames:
613 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
614 with open(filename, 'rb') as f:
617 type_id_str, data_hex = line.strip().split(' ')
618 type_id = int(type_id_str)
624 verified_hash = int(data_hex, 16)
625 yield 'verified_hash', verified_hash
626 verified_hashes.add(verified_hash)
628 raw_share = share_type.unpack(data_hex.decode('hex'))
629 if raw_share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
631 share = load_share(raw_share, self.net, None)
633 share_hashes.add(share.hash)
635 raise NotImplementedError("share type %i" % (type_id,))
637 log.err(None, "HARMLESS error while reading saved shares, continuing where left off:")
639 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
641 def _add_line(self, line):
642 filenames, next = self.get_filenames_and_next()
643 if filenames and os.path.getsize(filenames[-1]) < 10e6:
644 filename = filenames[-1]
648 with open(filename, 'ab') as f:
653 def add_share(self, share):
654 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
655 if share.hash in share_hashes:
658 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
659 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
660 share_hashes.add(share.hash)
661 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
662 share_hashes.add(share.hash)
664 def add_verified_hash(self, share_hash):
665 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
666 if share_hash in verified_hashes:
669 filename = self._add_line("%i %x" % (2, share_hash))
670 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
671 verified_hashes.add(share_hash)
672 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
673 verified_hashes.add(share_hash)
675 def get_filenames_and_next(self):
676 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())
677 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)))
679 def forget_share(self, share_hash):
680 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
681 if share_hash in share_hashes:
682 share_hashes.remove(share_hash)
685 def forget_verified_share(self, share_hash):
686 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
687 if share_hash in verified_hashes:
688 verified_hashes.remove(share_hash)
691 def check_remove(self):
693 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
694 #print filename, len(share_hashes) + len(verified_hashes)
695 if not share_hashes and not verified_hashes:
696 to_remove.add(filename)
697 for filename in to_remove:
698 self.known.pop(filename)
699 self.known_desired.pop(filename)
701 print "REMOVED", filename