1 from __future__ import division
8 from twisted.python import log
11 from p2pool import skiplists
12 from p2pool.bitcoin import data as bitcoin_data, script, namecoin, ixcoin, i0coin, solidcoin, litecoin
13 from p2pool.util import memoize, expiring_dict, math
16 merkle_branch_type = bitcoin_data.ListType(bitcoin_data.ComposedType([
17 ('side', bitcoin_data.StructType('<B')), # enum?
18 ('hash', bitcoin_data.HashType()),
22 share_data_type = bitcoin_data.ComposedType([
23 ('previous_share_hash', bitcoin_data.PossiblyNoneType(0, bitcoin_data.HashType())),
24 ('target', bitcoin_data.FloatingIntegerType()),
25 ('nonce', bitcoin_data.VarStrType()),
29 coinbase_type = bitcoin_data.ComposedType([
30 ('identifier', bitcoin_data.FixedStrType(8)),
31 ('share_data', share_data_type),
34 share_info_type = bitcoin_data.ComposedType([
35 ('share_data', share_data_type),
36 ('new_script', bitcoin_data.VarStrType()),
37 ('subsidy', bitcoin_data.StructType('<Q')),
41 share1a_type = bitcoin_data.ComposedType([
42 ('header', bitcoin_data.block_header_type),
43 ('share_info', share_info_type),
44 ('merkle_branch', merkle_branch_type),
47 share1b_type = bitcoin_data.ComposedType([
48 ('header', bitcoin_data.block_header_type),
49 ('share_info', share_info_type),
50 ('other_txs', bitcoin_data.ListType(bitcoin_data.tx_type)),
53 new_share_data_type = bitcoin_data.ComposedType([
54 ('previous_share_hash', bitcoin_data.PossiblyNoneType(0, bitcoin_data.HashType())),
55 ('coinbase', bitcoin_data.VarStrType()),
56 ('nonce', bitcoin_data.VarStrType()),
57 ('new_script', bitcoin_data.VarStrType()),
58 ('subsidy', bitcoin_data.StructType('<Q')),
59 ('donation', bitcoin_data.StructType('<H')),
62 new_share_info_type = bitcoin_data.ComposedType([
63 ('new_share_data', new_share_data_type),
64 ('target', bitcoin_data.FloatingIntegerType()),
67 new_share1a_type = bitcoin_data.ComposedType([
68 ('header', bitcoin_data.block_header_type),
69 ('share_info', new_share_info_type),
70 ('merkle_branch', merkle_branch_type),
73 new_share1b_type = bitcoin_data.ComposedType([
74 ('header', bitcoin_data.block_header_type),
75 ('share_info', new_share_info_type),
76 ('other_txs', bitcoin_data.ListType(bitcoin_data.tx_type)),
79 def calculate_merkle_branch(txs, index):
80 hash_list = [(bitcoin_data.tx_type.hash256(tx), i == index, []) for i, tx in enumerate(txs)]
82 while len(hash_list) > 1:
85 bitcoin_data.merkle_record_type.hash256(dict(left=left, right=right)),
87 (left_l if left_f else right_l) + [dict(side=1, hash=right) if left_f else dict(side=0, hash=left)],
89 for (left, left_f, left_l), (right, right_f, right_l) in
90 zip(hash_list[::2], hash_list[1::2] + [hash_list[::2][-1]])
93 assert hash_list[0][1]
94 assert check_merkle_branch(txs[index], hash_list[0][2]) == hash_list[0][0]
96 return hash_list[0][2]
98 def check_merkle_branch(tx, branch):
99 hash_ = bitcoin_data.tx_type.hash256(tx)
102 hash_ = bitcoin_data.merkle_record_type.hash256(dict(left=step['hash'], right=hash_))
104 hash_ = bitcoin_data.merkle_record_type.hash256(dict(left=hash_, right=step['hash']))
107 def share_info_to_gentx(share_info, block_target, tracker, net):
108 return generate_transaction(
110 previous_share_hash=share_info['share_data']['previous_share_hash'],
111 new_script=share_info['new_script'],
112 subsidy=share_info['subsidy'],
113 nonce=share_info['share_data']['nonce'],
114 block_target=block_target,
122 def from_block(cls, block, net):
123 return cls(net, block['header'], gentx_to_share_info(block['txs'][0]), other_txs=block['txs'][1:])
126 def from_share1a(cls, share1a, net):
127 return cls(net, **share1a)
130 def from_share1b(cls, share1b, net):
131 return cls(net, **share1b)
133 __slots__ = 'header previous_block share_info merkle_branch other_txs timestamp share_data new_script subsidy previous_hash previous_share_hash target nonce bitcoin_hash hash time_seen shared stored peer'.split(' ')
135 def __init__(self, net, header, share_info, merkle_branch=None, other_txs=None):
136 if merkle_branch is None and other_txs is None:
137 raise ValueError('need either merkle_branch or other_txs')
138 if other_txs is not None:
139 new_merkle_branch = calculate_merkle_branch([dict(version=0, tx_ins=[], tx_outs=[], lock_time=0)] + other_txs, 0)
140 if merkle_branch is not None:
141 if merke_branch != new_merkle_branch:
142 raise ValueError('invalid merkle_branch and other_txs')
143 merkle_branch = new_merkle_branch
145 if len(merkle_branch) > 16:
146 raise ValueError('merkle_branch too long!')
149 self.previous_block = header['previous_block']
150 self.share_info = share_info
151 self.merkle_branch = merkle_branch
152 self.other_txs = other_txs
154 self.timestamp = self.header['timestamp']
156 self.share_data = self.share_info['share_data']
157 self.new_script = self.share_info['new_script']
158 self.subsidy = self.share_info['subsidy']
160 if len(self.new_script) > 100:
161 raise ValueError('new_script too long!')
163 self.previous_hash = self.previous_share_hash = self.share_data['previous_share_hash']
164 self.target = self.share_data['target']
165 self.nonce = self.share_data['nonce']
167 if len(self.nonce) > 100:
168 raise ValueError('nonce too long!')
170 # use scrypt for Litecoin
171 if (getattr(net, 'BITCOIN_POW_SCRYPT', False)):
172 self.bitcoin_hash = bitcoin_data.block_header_type.scrypt(header)
173 self.hash = share1a_type.scrypt(self.as_share1a())
175 self.bitcoin_hash = bitcoin_data.block_header_type.hash256(header)
176 self.hash = share1a_type.hash256(self.as_share1a())
178 if self.bitcoin_hash > self.target:
179 print 'hash %x' % self.bitcoin_hash
180 print 'targ %x' % self.target
181 raise ValueError('not enough work!')
183 if script.get_sigop_count(self.new_script) > 1:
184 raise ValueError('too many sigops!')
187 self.time_seen = time.time()
192 def as_block(self, tracker, net):
193 if self.other_txs is None:
194 raise ValueError('share does not contain all txs')
196 gentx = share_info_to_gentx(self.share_info, self.header['target'], tracker, net)
198 return dict(header=self.header, txs=[gentx] + self.other_txs)
200 def as_share1a(self):
201 return dict(header=self.header, share_info=self.share_info, merkle_branch=self.merkle_branch)
203 def as_share1b(self):
204 if self.other_txs is None:
205 raise ValueError('share does not contain all txs')
207 return dict(header=self.header, share_info=self.share_info, other_txs=self.other_txs)
209 def check(self, tracker, now, net):
211 if self.previous_share_hash is not None:
212 if self.header['timestamp'] <= math.median((s.timestamp for s in itertools.islice(tracker.get_chain_to_root(self.previous_share_hash), 11)), use_float=False):
213 raise ValueError('share from too far in the past!')
215 if self.header['timestamp'] > now + 2*60*60:
216 raise ValueError('share from too far in the future!')
218 gentx = share_info_to_gentx(self.share_info, self.header['target'], tracker, net)
220 if len(gentx['tx_ins'][0]['script']) > 100:
221 raise ValueError('''coinbase too large! %i bytes''' % (len(gentx['tx_ins'][0]['script']),))
223 if check_merkle_branch(gentx, self.merkle_branch) != self.header['merkle_root']:
224 raise ValueError('''gentx doesn't match header via merkle_branch''')
226 if self.other_txs is not None:
227 if bitcoin_data.merkle_hash([gentx] + self.other_txs) != self.header['merkle_root']:
228 raise ValueError('''gentx doesn't match header via other_txs''')
230 if len(bitcoin_data.block_type.pack(dict(header=self.header, txs=[gentx] + self.other_txs))) > 1000000 - 1000:
231 raise ValueError('''block size too large''')
233 def flag_shared(self):
237 return '<Share %s>' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),)
239 class NewShare(Share):
240 def __init__(self, net, header, new_share_info, merkle_branch=None, other_txs=None):
241 if merkle_branch is None and other_txs is None:
242 raise ValueError('need either merkle_branch or other_txs')
243 if other_txs is not None:
244 new_merkle_branch = calculate_merkle_branch([dict(version=0, tx_ins=[], tx_outs=[], lock_time=0)] + other_txs, 0)
245 if merkle_branch is not None:
246 if merke_branch != new_merkle_branch:
247 raise ValueError('invalid merkle_branch and other_txs')
248 merkle_branch = new_merkle_branch
250 if len(merkle_branch) > 16:
251 raise ValueError('merkle_branch too long!')
254 self.previous_block = header['previous_block']
255 self.share_info = new_share_info
256 self.merkle_branch = merkle_branch
257 self.other_txs = other_txs
259 self.timestamp = self.header['timestamp']
261 self.share_data = self.share_info['new_share_data']
262 self.new_script = self.share_data['new_script']
263 self.subsidy = self.share_data['subsidy']
265 if len(self.new_script) > 100:
266 raise ValueError('new_script too long!')
268 self.previous_hash = self.previous_share_hash = self.share_data['previous_share_hash']
269 self.target = self.share_info['target']
270 self.nonce = self.share_data['nonce']
272 if len(self.nonce) > 100:
273 raise ValueError('nonce too long!')
275 if getattr(net, 'BITCOIN_POW_SCRYPT', False):
276 self.bitcoin_hash = bitcoin_data.block_header_type.scrypt(header)
278 self.bitcoin_hash = bitcoin_data.block_header_type.hash256(header)
280 self.hash = new_share1a_type.hash256(self.as_share1a())
282 if self.bitcoin_hash > self.target:
283 print 'hash %x' % self.bitcoin_hash
284 print 'targ %x' % self.target
285 raise ValueError('not enough work!')
287 if script.get_sigop_count(self.new_script) > 1:
288 raise ValueError('too many sigops!')
291 self.time_seen = time.time()
296 def check(self, tracker, now, net):
298 if self.previous_share_hash is not None:
299 if self.header['timestamp'] <= math.median((s.timestamp for s in itertools.islice(tracker.get_chain_to_root(self.previous_share_hash), 11)), use_float=False):
300 raise ValueError('share from too far in the past!')
302 if self.header['timestamp'] > now + 2*60*60:
303 raise ValueError('share from too far in the future!')
305 new_share_info, gentx = new_generate_transaction(tracker, self.share_info['new_share_data'], self.header['target'], net)
306 if new_share_info != self.share_info:
309 if len(gentx['tx_ins'][0]['script']) > 100:
310 raise ValueError('''coinbase too large! %i bytes''' % (len(gentx['tx_ins'][0]['script']),))
312 if check_merkle_branch(gentx, self.merkle_branch) != self.header['merkle_root']:
313 raise ValueError('''gentx doesn't match header via merkle_branch''')
315 if self.other_txs is not None:
316 if bitcoin_data.merkle_hash([gentx] + self.other_txs) != self.header['merkle_root']:
317 raise ValueError('''gentx doesn't match header via other_txs''')
319 if len(bitcoin_data.block_type.pack(dict(header=self.header, txs=[gentx] + self.other_txs))) > 1000000 - 1000:
320 raise ValueError('''block size too large''')
322 def get_pool_attempts_per_second(tracker, previous_share_hash, net, dist=None):
324 dist = net.TARGET_LOOKBEHIND
325 near = tracker.shares[previous_share_hash]
326 far = tracker.shares[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
327 attempts = tracker.get_work(near.hash) - tracker.get_work(far.hash)
328 time = near.timestamp - far.timestamp
331 return attempts//time
333 def generate_transaction(tracker, previous_share_hash, new_script, subsidy, nonce, block_target, net):
334 height, last = tracker.get_height_and_last(previous_share_hash)
335 assert height >= net.CHAIN_LENGTH or last is None
336 if height < net.TARGET_LOOKBEHIND:
337 target = bitcoin_data.FloatingInteger.from_target_upper_bound(net.MAX_TARGET)
339 attempts_per_second = get_pool_attempts_per_second(tracker, previous_share_hash, net)
340 previous_share = tracker.shares[previous_share_hash] if previous_share_hash is not None else None
341 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1
342 pre_target2 = math.clip(pre_target, (previous_share.target*9//10, previous_share.target*11//10))
343 pre_target3 = math.clip(pre_target2, (0, net.MAX_TARGET))
344 target = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
346 attempts_to_block = bitcoin_data.target_to_average_attempts(block_target)
347 max_weight = 65535 * net.SPREAD * attempts_to_block
349 this_weight = 65535 * min(bitcoin_data.target_to_average_attempts(target), max_weight)
350 other_weights, other_weights_total, other_donation_weight_total = tracker.get_cumulative_weights(previous_share_hash, min(height, net.CHAIN_LENGTH), max(0, max_weight - this_weight))
351 dest_weights, total_weight, donation_weight_total = math.add_dicts([{new_script: this_weight}, other_weights]), this_weight + other_weights_total, other_donation_weight_total
352 assert total_weight == sum(dest_weights.itervalues()) + donation_weight_total
355 amounts = dict((script, subsidy*(396*weight)//(400*total_weight)) for (script, weight) in dest_weights.iteritems())
356 amounts[new_script] = amounts.get(new_script, 0) + subsidy*2//400
357 amounts[net.SCRIPT] = amounts.get(net.SCRIPT, 0) + subsidy*2//400
358 amounts[net.SCRIPT] = amounts.get(net.SCRIPT, 0) + subsidy - sum(amounts.itervalues()) # collect any extra
360 amounts = dict((script, subsidy*(398*weight)//(400*total_weight)) for (script, weight) in dest_weights.iteritems())
361 amounts[new_script] = amounts.get(new_script, 0) + subsidy*2//400
362 amounts[new_script] = amounts.get(new_script, 0) + subsidy - sum(amounts.itervalues()) # collect any extra
364 if sum(amounts.itervalues()) != subsidy:
366 if any(x < 0 for x in amounts.itervalues()):
369 pre_dests = sorted(amounts.iterkeys(), key=lambda script: (amounts[script], script))
370 pre_dests = pre_dests[-4000:] # block length limit, unlikely to ever be hit
372 dests = sorted(pre_dests, key=lambda script: (script == new_script, script))
373 assert dests[-1] == new_script
376 previous_share_hash=previous_share_hash,
382 share_data=share_data,
383 new_script=new_script,
387 return share_info, dict(
390 previous_output=None,
392 script=coinbase_type.pack(dict(
393 identifier=net.IDENTIFIER,
394 share_data=share_data,
397 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script]],
401 def new_generate_transaction(tracker, new_share_data, block_target, net):
402 previous_share_hash = new_share_data['previous_share_hash']
403 new_script = new_share_data['new_script']
404 subsidy = new_share_data['subsidy']
405 donation = new_share_data['donation']
406 assert 0 <= donation <= 65535
408 height, last = tracker.get_height_and_last(previous_share_hash)
409 assert height >= net.CHAIN_LENGTH or last is None
410 if height < net.TARGET_LOOKBEHIND:
411 target = bitcoin_data.FloatingInteger.from_target_upper_bound(net.MAX_TARGET)
413 attempts_per_second = get_pool_attempts_per_second(tracker, previous_share_hash, net)
414 previous_share = tracker.shares[previous_share_hash] if previous_share_hash is not None else None
415 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1
416 pre_target2 = math.clip(pre_target, (previous_share.target*9//10, previous_share.target*11//10))
417 pre_target3 = math.clip(pre_target2, (0, net.MAX_TARGET))
418 target = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
420 attempts_to_block = bitcoin_data.target_to_average_attempts(block_target)
421 max_att = net.SPREAD * attempts_to_block
423 this_att = min(bitcoin_data.target_to_average_attempts(target), max_att)
424 other_weights, other_total_weight, other_donation_weight = tracker.get_cumulative_weights(previous_share_hash, min(height, net.CHAIN_LENGTH), 65535*max(0, max_att - this_att))
425 assert other_total_weight == sum(other_weights.itervalues()) + other_donation_weight, (other_total_weight, sum(other_weights.itervalues()) + other_donation_weight)
426 weights, total_weight, donation_weight = math.add_dicts([{new_script: this_att*(65535-donation)}, other_weights]), this_att*65535 + other_total_weight, this_att*donation + other_donation_weight
427 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
429 amounts = dict((script, subsidy*(199*weight)//(200*total_weight)) for (script, weight) in weights.iteritems())
430 amounts[new_script] = amounts.get(new_script, 0) + subsidy//200
431 amounts[net.SCRIPT] = amounts.get(net.SCRIPT, 0) + subsidy*(199*donation_weight)//(200*total_weight)
432 amounts[net.SCRIPT] = amounts.get(net.SCRIPT, 0) + subsidy - sum(amounts.itervalues()) # collect any extra satoshis :P
434 if sum(amounts.itervalues()) != subsidy:
436 if any(x < 0 for x in amounts.itervalues()):
441 code.interact(local=d)
444 pre_dests = sorted(amounts.iterkeys(), key=lambda script: (amounts[script], script))
445 pre_dests = pre_dests[-4000:] # block length limit, unlikely to ever be hit
447 dests = sorted(pre_dests, key=lambda script: (script == new_script, script))
448 assert dests[-1] == new_script
450 new_share_info = dict(
451 new_share_data=new_share_data,
455 return new_share_info, dict(
458 previous_output=None,
460 script=new_share_data['coinbase'],
462 tx_outs=[dict(value=0, script=bitcoin_data.HashType().pack(new_share_info_type.hash256(new_share_info)))] + [dict(value=amounts[script], script=script) for script in dests if amounts[script]],
467 class OkayTracker(bitcoin_data.Tracker):
468 def __init__(self, net):
469 bitcoin_data.Tracker.__init__(self)
471 self.verified = bitcoin_data.Tracker()
472 self.verified.get_nth_parent_hash = self.get_nth_parent_hash # self is a superset of self.verified
474 self.get_cumulative_weights = skiplists.WeightsSkipList(self)
476 def add(self, share, known_verified=False):
477 bitcoin_data.Tracker.add(self, share)
479 self.verified.add(share)
481 def attempt_verify(self, share, now):
482 if share.hash in self.verified.shares:
484 height, last = self.get_height_and_last(share.hash)
485 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
486 raise AssertionError()
488 share.check(self, now, self.net)
490 log.err(None, 'Share check failed:')
493 self.verified.add(share)
496 def think(self, ht, previous_block, now):
500 # make 'unverified heads' set?
501 # for each overall head, attempt verification
502 # if it fails, attempt on parent, and repeat
503 # if no successful verification because of lack of parents, request parent
505 for head in set(self.heads) - set(self.verified.heads):
506 head_height, last = self.get_height_and_last(head)
508 for share in itertools.islice(self.get_chain_known(head), None if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
509 if self.attempt_verify(share, now):
511 if share.hash in self.heads:
515 desired.add((self.shares[random.choice(list(self.reverse_shares[last]))].peer, last))
517 assert bad not in self.verified.shares
518 assert bad in self.heads
523 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
524 for head in list(self.verified.heads):
525 head_height, last_hash = self.verified.get_height_and_last(head)
526 last_height, last_last_hash = self.get_height_and_last(last_hash)
527 # XXX review boundary conditions
528 want = max(self.net.CHAIN_LENGTH - head_height, 0)
529 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
531 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
532 for share in itertools.islice(self.get_chain_known(last_hash), get):
533 if not self.attempt_verify(share, now):
535 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
536 desired.add((self.verified.shares[random.choice(list(self.verified.reverse_shares[last_hash]))].peer, last_last_hash))
539 best_tail = max(self.verified.tails, key=lambda h: self.score(max(self.verified.tails[h], key=self.verified.get_height), ht)) if self.verified.tails else None
540 # decide best verified head
541 scores = sorted(self.verified.tails.get(best_tail, []), key=lambda h: (
542 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
543 #self.verified.shares[h].peer is None,
544 ht.get_min_height(self.verified.shares[h].previous_block),
545 -self.verified.shares[h].time_seen
550 print len(self.verified.tails), "chain tails and", len(self.verified.tails.get(best_tail, [])), 'chain heads. Top 10 tails:'
553 for h in scores[-10:]:
554 print ' ', format_hash(h), format_hash(self.verified.shares[h].previous_hash), (
555 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
556 self.verified.shares[h].peer is None,
557 ht.get_min_height(self.verified.shares[h].previous_block),
558 -self.verified.shares[h].time_seen
563 for i in xrange(1000):
565 for share_hash, tail in self.heads.iteritems():
566 if share_hash in scores[-5:]:
569 if self.shares[share_hash].time_seen > time.time() - 300:
572 if share_hash not in self.verified.shares and max(self.shares[after_tail_hash].time_seen for after_tail_hash in self.reverse_shares.get(tail)) > time.time() - 120: # XXX stupid
575 to_remove.add(share_hash)
578 for share_hash in to_remove:
579 self.remove(share_hash)
580 if share_hash in self.verified.shares:
581 self.verified.remove(share_hash)
582 #print "_________", to_remove
585 for i in xrange(1000):
587 for tail, heads in self.tails.iteritems():
588 if min(self.get_height(head) for head in heads) < 2*self.net.CHAIN_LENGTH + 10:
590 for aftertail in self.reverse_shares.get(tail, set()):
591 if len(self.reverse_shares[self.shares[aftertail].previous_hash]) > 1: # XXX
594 to_remove.add(aftertail)
597 # if removed from this, it must be removed from verified
599 for aftertail in to_remove:
600 if self.shares[aftertail].previous_hash not in self.tails:
601 print "erk", aftertail, self.shares[aftertail].previous_hash
603 self.remove(aftertail)
604 if aftertail in self.verified.shares:
605 self.verified.remove(aftertail)
607 #print "removed! %i %f" % (len(to_remove), (end - start)/len(to_remove))
609 best = scores[-1] if scores else None
612 best_share = self.verified.shares[best]
613 if ht.get_min_height(best_share.header['previous_block']) < ht.get_min_height(previous_block) and best_share.bitcoin_hash != previous_block and best_share.peer is not None:
615 print 'Stale detected! %x < %x' % (best_share.header['previous_block'], previous_block)
616 best = best_share.previous_hash
620 @memoize.memoize_with_backing(expiring_dict.ExpiringDict(5, get_touches=False))
621 def score(self, share_hash, ht):
622 head_height, last = self.verified.get_height_and_last(share_hash)
626 share2_hash = self.verified.get_nth_parent_hash(share_hash, min(self.net.CHAIN_LENGTH//2, head_height//2)) if last is not None else share_hash
627 for share in reversed(list(itertools.islice(self.verified.get_chain_known(share2_hash), self.net.CHAIN_LENGTH))):
628 max_height = max(max_height, ht.get_min_height(share.header['previous_block']))
629 attempts += bitcoin_data.target_to_average_attempts(share.target)
630 this_score = attempts//(ht.get_highest_height() - max_height + 1)
631 if this_score > score2:
633 return min(head_height, self.net.CHAIN_LENGTH), score2
638 return '%08x' % (x % 2**32)
640 class ShareStore(object):
641 def __init__(self, prefix, net):
642 self.filename = prefix
644 self.known = None # will be filename -> set of share hashes, set of verified hashes
646 def get_shares(self):
647 if self.known is not None:
648 raise AssertionError()
650 filenames, next = self.get_filenames_and_next()
651 for filename in filenames:
652 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
653 with open(filename, 'rb') as f:
656 type_id_str, data_hex = line.strip().split(' ')
657 type_id = int(type_id_str)
659 share = Share.from_share1a(share1a_type.unpack(data_hex.decode('hex')), self.net)
661 share_hashes.add(share.hash)
663 share = Share.from_share1b(share1b_type.unpack(data_hex.decode('hex')), self.net)
665 share_hashes.add(share.hash)
667 verified_hash = int(data_hex, 16)
668 yield 'verified_hash', verified_hash
669 verified_hashes.add(verified_hash)
671 share = NewShare.from_share1a(new_share1a_type.unpack(data_hex.decode('hex')), self.net)
673 share_hashes.add(share.hash)
675 share = NewShare.from_share1b(new_share1b_type.unpack(data_hex.decode('hex')), self.net)
677 share_hashes.add(share.hash)
679 raise NotImplementedError("share type %i" % (type_id,))
681 log.err(None, "Error while reading saved shares, continuing where left off:")
684 def _add_line(self, line):
685 filenames, next = self.get_filenames_and_next()
686 if filenames and os.path.getsize(filenames[-1]) < 10e6:
687 filename = filenames[-1]
691 with open(filename, 'ab') as f:
696 def add_share(self, share):
697 if isinstance(share, NewShare) and share.bitcoin_hash <= share.header['target']:
698 type_id, data = 4, new_share1b_type.pack(share.as_share1b())
699 elif isinstance(share, NewShare):
700 type_id, data = 3, new_share1a_type.pack(share.as_share1a())
701 elif share.bitcoin_hash <= share.header['target']:
702 type_id, data = 1, share1b_type.pack(share.as_share1b())
704 type_id, data = 0, share1a_type.pack(share.as_share1a())
705 filename = self._add_line("%i %s" % (type_id, data.encode('hex')))
706 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
707 share_hashes.add(share.hash)
709 def add_verified_hash(self, share_hash):
710 filename = self._add_line("%i %x" % (2, share_hash))
711 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
712 verified_hashes.add(share_hash)
714 def get_filenames_and_next(self):
715 suffixes = sorted(int(x[len(self.filename):]) for x in os.listdir('.') if x.startswith(self.filename) and x[len(self.filename):].isdigit())
716 return [self.filename + str(suffix) for suffix in suffixes], self.filename + str(suffixes[-1] + 1) if suffixes else self.filename + str(0)
718 def forget_share(self, share_hash):
719 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
720 if share_hash in share_hashes:
721 share_hashes.remove(share_hash)
724 def forget_verified_share(self, share_hash):
725 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
726 if share_hash in verified_hashes:
727 verified_hashes.remove(share_hash)
730 def check_remove(self):
732 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
733 #print filename, len(share_hashes) + len(verified_hashes)
734 if not share_hashes and not verified_hashes:
735 to_remove.add(filename)
736 for filename in to_remove:
737 self.known.pop(filename)
739 print "REMOVED", filename
741 class BitcoinMainnet(bitcoin_data.Mainnet):
742 SHARE_PERIOD = 10 # seconds
743 CHAIN_LENGTH = 24*60*60//5 # shares
744 TARGET_LOOKBEHIND = 200 # shares
746 SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
747 IDENTIFIER = 'fc70035c7a81bc6f'.decode('hex')
748 PREFIX = '2472ef181efcd37b'.decode('hex')
751 MAX_TARGET = 2**256//2**32 - 1
755 class BitcoinTestnet(bitcoin_data.Testnet):
756 SHARE_PERIOD = 1 # seconds
757 CHAIN_LENGTH = 24*60*60//5 # shares
758 TARGET_LOOKBEHIND = 200 # shares
760 SCRIPT = '410403ad3dee8ab3d8a9ce5dd2abfbe7364ccd9413df1d279bf1a207849310465b0956e5904b1155ecd17574778f9949589ebfd4fb33ce837c241474a225cf08d85dac'.decode('hex')
761 IDENTIFIER = '5fc2be2d4f0d6bfb'.decode('hex')
762 PREFIX = '3f6057a15036f441'.decode('hex')
763 NAME = 'bitcoin_testnet'
765 MAX_TARGET = 2**256//2**32 - 1
769 class NamecoinMainnet(namecoin.Mainnet):
770 SHARE_PERIOD = 10 # seconds
771 CHAIN_LENGTH = 24*60*60//10 # shares
772 TARGET_LOOKBEHIND = 3600//10 # shares
774 SCRIPT = '41043da5beb73f8f18cede1a41b0ed953123f1342b8e0216ab5bf71ed3e024201b4017f472bddb6041f17978d89ed8f8ed84f9e726b0bca80cacf96347c7153e8df0ac'.decode('hex')
775 IDENTIFIER = 'd5b1192062c4c454'.decode('hex')
776 PREFIX = 'b56f3d0fb24fc982'.decode('hex')
779 MAX_TARGET = 2**256//2**32 - 1
783 class NamecoinTestnet(namecoin.Testnet):
784 SHARE_PERIOD = 1 # seconds
785 CHAIN_LENGTH = 24*60*60//5 # shares
786 TARGET_LOOKBEHIND = 200 # shares
788 SCRIPT = '410403ad3dee8ab3d8a9ce5dd2abfbe7364ccd9413df1d279bf1a207849310465b0956e5904b1155ecd17574778f9949589ebfd4fb33ce837c241474a225cf08d85dac'.decode('hex')
789 IDENTIFIER = '8dd303d014a01a60'.decode('hex')
790 PREFIX = '4d6581d24f51acbf'.decode('hex')
791 NAME = 'namecoin_testnet'
793 MAX_TARGET = 2**256//2**20 - 1
797 class IxcoinMainnet(ixcoin.Mainnet):
798 SHARE_PERIOD = 10 # seconds
799 CHAIN_LENGTH = 24*60*60//10 # shares
800 TARGET_LOOKBEHIND = 3600//10 # shares
802 SCRIPT = '41043da5beb73f8f18cede1a41b0ed953123f1342b8e0216ab5bf71ed3e024201b4017f472bddb6041f17978d89ed8f8ed84f9e726b0bca80cacf96347c7153e8df0ac'.decode('hex')
803 IDENTIFIER = '27b564116e2a2666'.decode('hex')
804 PREFIX = '9dd6c4a619401f2f'.decode('hex')
807 MAX_TARGET = 2**256//2**32 - 1
811 class IxcoinTestnet(ixcoin.Testnet):
812 SHARE_PERIOD = 1 # seconds
813 CHAIN_LENGTH = 24*60*60//5 # shares
814 TARGET_LOOKBEHIND = 200 # shares
816 SCRIPT = '410403ad3dee8ab3d8a9ce5dd2abfbe7364ccd9413df1d279bf1a207849310465b0956e5904b1155ecd17574778f9949589ebfd4fb33ce837c241474a225cf08d85dac'.decode('hex')
817 IDENTIFIER = '7430cbeb01249e44'.decode('hex')
818 PREFIX = '7cfffda946709c1f'.decode('hex')
819 NAME = 'ixcoin_testnet'
821 MAX_TARGET = 2**256//2**20 - 1
825 class I0coinMainnet(i0coin.Mainnet):
826 SHARE_PERIOD = 10 # seconds
827 CHAIN_LENGTH = 24*60*60//10 # shares
828 TARGET_LOOKBEHIND = 3600//10 # shares
830 SCRIPT = '410403ad3dee8ab3d8a9ce5dd2abfbe7364ccd9413df1d279bf1a207849310465b0956e5904b1155ecd17574778f9949589ebfd4fb33ce837c241474a225cf08d85dac'.decode('hex')
831 IDENTIFIER = 'b32e3f10c2ff221b'.decode('hex')
832 PREFIX = '6155537ed977a3b5'.decode('hex')
835 MAX_TARGET = 2**256//2**32 - 1
839 class I0coinTestnet(i0coin.Testnet):
840 SHARE_PERIOD = 1 # seconds
841 CHAIN_LENGTH = 24*60*60//5 # shares
842 TARGET_LOOKBEHIND = 200 # shares
844 SCRIPT = '410403ad3dee8ab3d8a9ce5dd2abfbe7364ccd9413df1d279bf1a207849310465b0956e5904b1155ecd17574778f9949589ebfd4fb33ce837c241474a225cf08d85dac'.decode('hex')
845 IDENTIFIER = '7712c1a8181b5f2e'.decode('hex')
846 PREFIX = '792d2e7d770fbe68'.decode('hex')
847 NAME = 'i0coin_testnet'
849 MAX_TARGET = 2**256//2**20 - 1
853 class SolidcoinMainnet(solidcoin.Mainnet):
855 CHAIN_LENGTH = 24*60*60//10 # shares
856 TARGET_LOOKBEHIND = 3600//10 # shares
858 SCRIPT = bitcoin_data.pubkey_hash_to_script2(bitcoin_data.address_to_pubkey_hash('sMKZ1yxHETxPYKh4Z2anWnwZDJZU7ztroy', solidcoin.Mainnet))
859 IDENTIFIER = '9cc9c421cca258cd'.decode('hex')
860 PREFIX = 'c059125b8070f00a'.decode('hex')
863 MAX_TARGET = 2**256//2**32 - 1
867 class LitecoinMainnet(litecoin.Mainnet):
868 SHARE_PERIOD = 10 # seconds
869 CHAIN_LENGTH = 24*60*60//5 # shares
870 TARGET_LOOKBEHIND = 200 # shares
872 SCRIPT = None # no fee
873 IDENTIFIER = 'e037d5b8c6923410'.decode('hex')
874 PREFIX = '7208c1a53ef629b0'.decode('hex')
877 MAX_TARGET = 2**256//2**20 - 1
881 class LitecoinTestnet(litecoin.Testnet):
882 SHARE_PERIOD = 1 # seconds
883 CHAIN_LENGTH = 24*60*60//5 # shares
884 TARGET_LOOKBEHIND = 200 # shares
886 SCRIPT = None # no fee
887 IDENTIFIER = 'cca5e24ec6408b1e'.decode('hex')
888 PREFIX = 'ad9614f6466a39cf'.decode('hex')
889 NAME = 'litecoin_testnet'
891 MAX_TARGET = 2**256//2**17 - 1
895 nets = dict((net.NAME, net) for net in set([BitcoinMainnet, BitcoinTestnet, NamecoinMainnet, NamecoinTestnet, IxcoinMainnet, IxcoinTestnet, I0coinMainnet, I0coinTestnet, SolidcoinMainnet, LitecoinMainnet, LitecoinTestnet]))