1 from __future__ import division
8 from twisted.python import log
11 from p2pool.bitcoin import data as bitcoin_data, script, sha256
12 from p2pool.util import math, forest, pack
16 hash_link_type = pack.ComposedType([
17 ('state', pack.FixedStrType(32)),
18 ('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
19 ('length', pack.VarIntType()),
22 def prefix_to_hash_link(prefix, const_ending=''):
23 assert prefix.endswith(const_ending), (prefix, const_ending)
24 x = sha256.sha256(prefix)
25 return dict(state=x.state, extra_data=x.buf[:max(0, len(x.buf)-len(const_ending))], length=x.length//8)
27 def check_hash_link(hash_link, data, const_ending=''):
28 extra_length = hash_link['length'] % (512//8)
29 assert len(hash_link['extra_data']) == max(0, extra_length - len(const_ending))
30 extra = (hash_link['extra_data'] + const_ending)[len(hash_link['extra_data']) + len(const_ending) - extra_length:]
31 assert len(extra) == extra_length
32 return pack.IntType(256).unpack(hashlib.sha256(sha256.sha256(data, (hash_link['state'], extra, 8*hash_link['length'])).digest()).digest())
40 share_type = pack.ComposedType([
41 ('type', pack.VarIntType()),
42 ('contents', pack.VarStrType()),
45 def load_share(share, net, peer):
46 if share['type'] in [0, 1, 2, 3]:
47 from p2pool import p2p
48 raise p2p.PeerMisbehavingError('sent an obsolete share')
49 elif share['type'] == 4:
50 return Share(net, peer, other_txs=None, **Share.share1a_type.unpack(share['contents']))
51 elif share['type'] == 5:
52 share1b = Share.share1b_type.unpack(share['contents'])
53 return Share(net, peer, merkle_link=bitcoin_data.calculate_merkle_link([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in share1b['other_txs']], 0), **share1b)
54 elif share['type'] == 8:
55 return NewShare(net, peer, NewShare.share_type.unpack(share['contents']))
57 raise ValueError('unknown share type: %r' % (share['type'],))
59 DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
62 small_block_header_type = pack.ComposedType([
63 ('version', pack.VarIntType()), # XXX must be constrained to 32 bits
64 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
65 ('timestamp', pack.IntType(32)),
66 ('bits', bitcoin_data.FloatingIntegerType()),
67 ('nonce', pack.IntType(32)),
70 share_data_type = pack.ComposedType([
71 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
72 ('coinbase', pack.VarStrType()),
73 ('nonce', pack.IntType(32)),
74 ('pubkey_hash', pack.IntType(160)),
75 ('subsidy', pack.IntType(64)),
76 ('donation', pack.IntType(16)),
77 ('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)))),
78 ('desired_version', pack.VarIntType()),
81 share_info_type = pack.ComposedType([
82 ('share_data', share_data_type),
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_common_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.VarIntType()),
96 ('hash_link', hash_link_type),
98 share1a_type = pack.ComposedType([
99 ('common', share_common_type),
100 ('merkle_link', pack.ComposedType([
101 ('branch', pack.ListType(pack.IntType(256))),
102 ('index', pack.IntType(0)), # it will always be 0
105 share1b_type = pack.ComposedType([
106 ('common', share_common_type),
107 ('other_txs', pack.ListType(bitcoin_data.tx_type)),
110 ref_type = pack.ComposedType([
111 ('identifier', pack.FixedStrType(64//8)),
112 ('share_info', share_info_type),
115 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x20' + pack.IntType(256).pack(0))[:2]
118 def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes, net):
119 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
121 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
122 assert height >= net.REAL_CHAIN_LENGTH or last is None
123 if height < net.TARGET_LOOKBEHIND:
124 pre_target3 = net.MAX_TARGET
126 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
127 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
128 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
129 pre_target3 = math.clip(pre_target2, (0, net.MAX_TARGET))
130 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
131 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
133 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
134 min(height, net.REAL_CHAIN_LENGTH),
135 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
137 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
139 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
140 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
141 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
142 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
144 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
147 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
150 share_data=share_data,
151 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
154 timestamp=math.clip(desired_timestamp, (
155 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
156 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
157 )) if previous_share is not None else desired_timestamp,
163 previous_output=None,
165 script=share_data['coinbase'].ljust(2, '\x00'),
167 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
169 script='\x20' + cls.get_ref_hash(net, share_info, ref_merkle_link),
174 def get_share(header, transactions):
175 assert transactions[0] == gentx and [bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx)) for tx in transactions[1:]] == desired_other_transaction_hashes
176 min_header = dict(header);del min_header['merkle_root']
177 hash_link = prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4], cls.gentx_before_refhash)
178 merkle_link = bitcoin_data.calculate_merkle_link([None] + desired_other_transaction_hashes, 0)
179 pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header))
180 return cls(net, None, dict(
181 min_header=min_header, share_info=share_info, hash_link=hash_link,
182 ref_merkle_link=dict(branch=[], index=0),
183 ), merkle_link=merkle_link, other_txs=transactions[1:] if pow_hash <= header['bits'].target else None)
185 return share_info, gentx, desired_other_transaction_hashes, get_share
188 def get_ref_hash(cls, net, share_info, ref_merkle_link):
189 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
190 identifier=net.IDENTIFIER,
191 share_info=share_info,
192 ))), ref_merkle_link))
194 __slots__ = 'net peer common min_header share_info hash_link merkle_link other_txs 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(' ')
196 def __init__(self, net, peer, common, merkle_link, other_txs):
200 self.min_header = common['min_header']
201 self.share_info = common['share_info']
202 self.hash_link = common['hash_link']
203 self.merkle_link = merkle_link
204 self.other_txs = other_txs
206 if len(self.share_info['share_data']['coinbase']) > 100:
207 raise ValueError('''coinbase too large! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
209 if len(merkle_link['branch']) > 16:
210 raise ValueError('merkle branch too long!')
212 if p2pool.DEBUG and other_txs is not None and bitcoin_data.calculate_merkle_link([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in other_txs], 0) != merkle_link:
213 raise ValueError('merkle_link and other_txs do not match')
215 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
217 self.share_data = self.share_info['share_data']
218 self.max_target = self.share_info['max_bits'].target
219 self.target = self.share_info['bits'].target
220 self.timestamp = self.share_info['timestamp']
221 self.previous_hash = self.share_data['previous_share_hash']
222 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
223 self.desired_version = self.share_data['desired_version']
225 self.gentx_hash = check_hash_link(
227 self.get_ref_hash(net, self.share_info, common['ref_merkle_link']) + pack.IntType(32).pack(0),
228 self.gentx_before_refhash,
230 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, merkle_link)
231 self.header = dict(self.min_header, merkle_root=merkle_root)
232 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
233 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
235 if self.pow_hash > self.target:
236 from p2pool import p2p
237 raise p2p.PeerMisbehavingError('share PoW invalid')
239 if other_txs is not None and not self.pow_hash <= self.header['bits'].target:
240 raise ValueError('other_txs provided when not a block solution')
241 if other_txs is None and self.pow_hash <= self.header['bits'].target:
242 raise ValueError('other_txs not provided when a block solution')
244 self.new_transaction_hashes = []
247 self.time_seen = time.time()
250 return '<Share %s>' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),)
252 def as_share1a(self):
253 return dict(type=4, contents=self.share1a_type.pack(dict(common=self.common, merkle_link=self.merkle_link)))
255 def as_share1b(self):
256 return dict(type=5, contents=self.share1b_type.pack(dict(common=self.common, other_txs=self.other_txs)))
259 if not self.pow_hash <= self.header['bits'].target: # share1a
260 return self.as_share1a()
262 return self.as_share1b()
264 def check(self, tracker):
265 share_info, gentx, other_transaction_hashes, 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.common['ref_merkle_link'], [], self.net) # ok because desired_other_transaction_hashes is only used in get_share
266 if share_info != self.share_info:
267 raise ValueError('share_info invalid')
268 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
269 raise ValueError('''gentx doesn't match hash_link''')
270 return gentx # only used by as_block
272 def as_block(self, tracker):
273 if self.other_txs is None:
274 raise ValueError('share does not contain all txs')
275 return dict(header=self.header, txs=[self.check(tracker)] + self.other_txs)
277 class NewShare(object):
278 small_block_header_type = pack.ComposedType([
279 ('version', pack.VarIntType()),
280 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
281 ('timestamp', pack.IntType(32)),
282 ('bits', bitcoin_data.FloatingIntegerType()),
283 ('nonce', pack.IntType(32)),
286 share_info_type = pack.ComposedType([
287 ('share_data', pack.ComposedType([
288 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
289 ('coinbase', pack.VarStrType()),
290 ('nonce', pack.IntType(32)),
291 ('pubkey_hash', pack.IntType(160)),
292 ('subsidy', pack.IntType(64)),
293 ('donation', pack.IntType(16)),
294 ('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)))),
295 ('desired_version', pack.VarIntType()),
297 ('new_transaction_hashes', pack.ListType(pack.IntType(256))),
298 ('transaction_hash_refs', pack.ListType(pack.ComposedType([ # compressed by referencing previous shares' hashes
299 ('share_count', pack.VarIntType()),
300 ('tx_count', pack.VarIntType()),
302 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
303 ('max_bits', bitcoin_data.FloatingIntegerType()),
304 ('bits', bitcoin_data.FloatingIntegerType()),
305 ('timestamp', pack.IntType(32)),
308 share_type = pack.ComposedType([
309 ('min_header', small_block_header_type),
310 ('share_info', share_info_type),
311 ('ref_merkle_link', pack.ComposedType([
312 ('branch', pack.ListType(pack.IntType(256))),
313 ('index', pack.IntType(0)),
315 ('hash_link', hash_link_type),
316 ('merkle_link', pack.ComposedType([
317 ('branch', pack.ListType(pack.IntType(256))),
318 ('index', pack.IntType(0)), # it will always be 0
322 ref_type = pack.ComposedType([
323 ('identifier', pack.FixedStrType(64//8)),
324 ('share_info', share_info_type),
327 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x20' + pack.IntType(256).pack(0))[:2]
330 def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes, net):
331 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
333 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
334 assert height >= net.REAL_CHAIN_LENGTH or last is None
335 if height < net.TARGET_LOOKBEHIND:
336 pre_target3 = net.MAX_TARGET
338 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
339 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
340 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
341 pre_target3 = math.clip(pre_target2, (0, net.MAX_TARGET))
342 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
343 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
345 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
346 min(height, net.REAL_CHAIN_LENGTH),
347 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
349 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
351 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
352 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
353 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
354 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
356 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
359 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
361 new_transaction_hashes = []
362 transaction_hash_refs = []
363 other_transaction_hashes = []
365 for tx_hash in desired_other_transaction_hashes:
366 for i, share in enumerate(tracker.get_chain(share_data['previous_share_hash'], min(height, 100))):
367 if tx_hash in share.new_transaction_hashes:
368 this = dict(share_count=i+1, tx_count=share.new_transaction_hashes.index(tx_hash))
371 if len(new_transaction_hashes) == 10: # only allow 10 new txns/share
373 new_transaction_hashes.append(tx_hash)
374 this = dict(share_count=0, tx_count=len(new_transaction_hashes)-1)
375 transaction_hash_refs.append(this)
376 other_transaction_hashes.append(tx_hash)
379 share_data=share_data,
380 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
383 timestamp=math.clip(desired_timestamp, (
384 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
385 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
386 )) if previous_share is not None else desired_timestamp,
387 new_transaction_hashes=new_transaction_hashes,
388 transaction_hash_refs=transaction_hash_refs,
394 previous_output=None,
396 script=share_data['coinbase'],
398 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
400 script='\x20' + cls.get_ref_hash(net, share_info, ref_merkle_link),
405 def get_share(header, transactions):
406 min_header=dict(header);del min_header['merkle_root']
407 return cls(net, None, dict(
408 min_header=min_header,
409 share_info=share_info,
410 ref_merkle_link=dict(branch=[], index=0),
411 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4], cls.gentx_before_refhash),
412 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
415 return share_info, gentx, other_transaction_hashes, get_share
418 def get_ref_hash(cls, net, share_info, ref_merkle_link):
419 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
420 identifier=net.IDENTIFIER,
421 share_info=share_info,
422 ))), ref_merkle_link))
424 __slots__ = 'net peer contents min_header share_info hash_link merkle_link other_txs 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(' ')
426 def __init__(self, net, peer, contents):
429 self.contents = contents
431 self.min_header = contents['min_header']
432 self.share_info = contents['share_info']
433 self.hash_link = contents['hash_link']
434 self.merkle_link = contents['merkle_link']
436 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
437 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
439 if len(self.merkle_link['branch']) > 16:
440 raise ValueError('merkle branch too long!')
442 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
444 self.share_data = self.share_info['share_data']
445 self.max_target = self.share_info['max_bits'].target
446 self.target = self.share_info['bits'].target
447 self.timestamp = self.share_info['timestamp']
448 self.previous_hash = self.share_data['previous_share_hash']
449 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
450 self.desired_version = self.share_data['desired_version']
452 for x in self.share_info['transaction_hash_refs']:
453 assert x['share_count'] < net.CHAIN_LENGTH
455 self.gentx_hash = check_hash_link(
457 self.get_ref_hash(net, self.share_info, contents['ref_merkle_link']) + pack.IntType(32).pack(0),
458 self.gentx_before_refhash,
460 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
461 self.header = dict(self.min_header, merkle_root=merkle_root)
462 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
463 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
465 if self.target > net.MAX_TARGET:
466 from p2pool import p2p
467 raise p2p.PeerMisbehavingError('share target invalid')
469 if self.pow_hash > self.target:
470 from p2pool import p2p
471 raise p2p.PeerMisbehavingError('share PoW invalid')
473 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
476 self.time_seen = time.time()
479 return 'Share' + repr((self.net, self.peer, self.contents))
482 return dict(type=8, contents=self.share_type.pack(self.contents))
484 def check(self, tracker):
485 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']]
487 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)
488 assert other_tx_hashes2 == other_tx_hashes
489 if share_info != self.share_info:
490 raise ValueError('share_info invalid')
491 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
492 raise ValueError('''gentx doesn't match hash_link''')
494 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
495 raise ValueError('merkle_link and other_tx_hashes do not match')
497 #return [gentx] + other_txs # only used by as_block
499 def as_block(self, tracker):
501 return dict(header=self.header, txs=self.check(tracker))
504 class WeightsSkipList(forest.TrackerSkipList):
505 # share_count, weights, total_weight
507 def get_delta(self, element):
508 from p2pool.bitcoin import data as bitcoin_data
509 share = self.tracker.items[element]
510 att = bitcoin_data.target_to_average_attempts(share.target)
511 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
513 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
514 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
516 def initial_solution(self, start, (max_shares, desired_weight)):
517 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
520 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)):
521 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
522 assert (desired_weight - total_weight1) % 65535 == 0
523 script, = weights2.iterkeys()
524 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
525 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)
526 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
528 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
529 if share_count > max_shares or total_weight > desired_weight:
531 elif share_count == max_shares or total_weight == desired_weight:
536 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
537 assert share_count <= max_shares and total_weight <= desired_weight
538 assert share_count == max_shares or total_weight == desired_weight
539 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
541 class OkayTracker(forest.Tracker):
542 def __init__(self, net, my_share_hashes, my_doa_share_hashes):
543 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
544 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
545 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
548 self.verified = forest.Tracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
549 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
550 my_count=lambda share: 1 if share.hash in my_share_hashes else 0,
551 my_doa_count=lambda share: 1 if share.hash in my_doa_share_hashes else 0,
552 my_orphan_announce_count=lambda share: 1 if share.hash in my_share_hashes and share.share_data['stale_info'] == 'orphan' else 0,
553 my_dead_announce_count=lambda share: 1 if share.hash in my_share_hashes and share.share_data['stale_info'] == 'doa' else 0,
555 self.get_cumulative_weights = WeightsSkipList(self)
557 def attempt_verify(self, share):
558 if share.hash in self.verified.items:
560 height, last = self.get_height_and_last(share.hash)
561 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
562 raise AssertionError()
566 log.err(None, 'Share check failed:')
569 self.verified.add(share)
572 def think(self, block_rel_height_func, previous_block, bits):
576 # make 'unverified heads' set?
577 # for each overall head, attempt verification
578 # if it fails, attempt on parent, and repeat
579 # if no successful verification because of lack of parents, request parent
581 for head in set(self.heads) - set(self.verified.heads):
582 head_height, last = self.get_height_and_last(head)
584 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
585 if self.attempt_verify(share):
587 if share.hash in self.heads:
592 self.items[random.choice(list(self.reverse[last]))].peer,
594 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
595 min(x.target for x in self.get_chain(head, min(head_height, 5))),
598 assert bad not in self.verified.items
599 assert bad in self.heads
604 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
605 for head in list(self.verified.heads):
606 head_height, last_hash = self.verified.get_height_and_last(head)
607 last_height, last_last_hash = self.get_height_and_last(last_hash)
608 # XXX review boundary conditions
609 want = max(self.net.CHAIN_LENGTH - head_height, 0)
610 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
612 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
613 for share in self.get_chain(last_hash, get):
614 if not self.attempt_verify(share):
616 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
618 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer,
620 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
621 min(x.target for x in self.get_chain(head, min(head_height, 5))),
625 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)
627 print len(decorated_tails), 'tails:'
628 for score, tail_hash in decorated_tails:
629 print format_hash(tail_hash), score
630 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
632 # decide best verified head
633 decorated_heads = sorted(((
634 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
635 #self.items[h].peer is None,
636 self.items[h].pow_hash <= self.items[h].header['bits'].target, # is block solution
637 (self.items[h].header['previous_block'], self.items[h].header['bits']) == (previous_block, bits) or self.items[h].peer is None,
638 -self.items[h].time_seen,
639 ), h) for h in self.verified.tails.get(best_tail, []))
641 print len(decorated_heads), 'heads. Top 10:'
642 for score, head_hash in decorated_heads[-10:]:
643 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
644 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
648 for i in xrange(1000):
650 for share_hash, tail in self.heads.iteritems():
651 if share_hash in [head_hash for score, head_hash in decorated_heads[-5:]]:
654 if self.items[share_hash].time_seen > time.time() - 300:
657 if share_hash not in self.verified.items and max(self.items[after_tail_hash].time_seen for after_tail_hash in self.reverse.get(tail)) > time.time() - 120: # XXX stupid
660 to_remove.add(share_hash)
663 for share_hash in to_remove:
664 if share_hash in self.verified.items:
665 self.verified.remove(share_hash)
666 self.remove(share_hash)
667 #print "_________", to_remove
670 for i in xrange(1000):
672 for tail, heads in self.tails.iteritems():
673 if min(self.get_height(head) for head in heads) < 2*self.net.CHAIN_LENGTH + 10:
675 for aftertail in self.reverse.get(tail, set()):
676 if len(self.reverse[self.items[aftertail].previous_hash]) > 1: # XXX
679 to_remove.add(aftertail)
682 # if removed from this, it must be removed from verified
684 for aftertail in to_remove:
685 if self.items[aftertail].previous_hash not in self.tails:
686 print "erk", aftertail, self.items[aftertail].previous_hash
688 if aftertail in self.verified.items:
689 self.verified.remove(aftertail)
690 self.remove(aftertail)
692 #print "removed! %i %f" % (len(to_remove), (end - start)/len(to_remove))
695 best_share = self.items[best]
696 if (best_share.header['previous_block'], best_share.header['bits']) != (previous_block, bits) and best_share.header_hash != previous_block and best_share.peer is not None:
698 print 'Stale detected! %x < %x' % (best_share.header['previous_block'], previous_block)
699 best = best_share.previous_hash
701 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
702 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
704 timestamp_cutoff = int(time.time()) - 24*60*60
705 target_cutoff = 2**256-1
708 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))
709 for peer, hash, ts, targ in desired:
710 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
712 return best, [(peer, hash) for peer, hash, ts, targ in desired if ts >= timestamp_cutoff]
714 def score(self, share_hash, block_rel_height_func):
715 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
717 head_height = self.verified.get_height(share_hash)
718 if head_height < self.net.CHAIN_LENGTH:
719 return head_height, None
721 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
723 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
724 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
726 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work//((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
728 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
730 near = tracker.items[previous_share_hash]
731 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
732 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
733 time = near.timestamp - far.timestamp
737 return attempts//time
740 def get_average_stale_prop(tracker, share_hash, lookbehind):
741 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
742 return stales/(lookbehind + stales)
744 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
746 for share in tracker.get_chain(share_hash, lookbehind - 1):
747 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
748 s = share.share_data['stale_info']
750 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
752 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
753 res = dict((k, v/dt) for k, v in res.iteritems())
756 def get_user_stale_props(tracker, share_hash, lookbehind):
758 for share in tracker.get_chain(share_hash, lookbehind - 1):
759 stale, total = res.get(share.share_data['pubkey_hash'], (0, 0))
761 if share.share_data['stale_info'] is not None:
764 res[share.share_data['pubkey_hash']] = stale, total
765 return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems())
767 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
768 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))
769 res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
770 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
773 def get_desired_version_counts(tracker, best_share_hash, dist):
775 for share in tracker.get_chain(best_share_hash, dist):
776 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
779 def get_warnings(tracker, best_share, net, bitcoind_warning, bitcoind_work_value):
782 desired_version_counts = get_desired_version_counts(tracker, best_share,
783 min(60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
784 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
785 if majority_desired_version > 5 and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
786 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
787 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
788 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
790 if bitcoind_warning is not None:
791 res.append('(from bitcoind) %s' % (bitcoind_warning,))
793 if time.time() > bitcoind_work_value['last_update'] + 60:
794 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']),))
801 return '%08x' % (x % 2**32)
803 class ShareStore(object):
804 def __init__(self, prefix, net):
805 self.filename = prefix
806 self.dirname = os.path.dirname(os.path.abspath(prefix))
807 self.filename = os.path.basename(os.path.abspath(prefix))
809 self.known = None # will be filename -> set of share hashes, set of verified hashes
810 self.known_desired = None
812 def get_shares(self):
813 if self.known is not None:
814 raise AssertionError()
816 filenames, next = self.get_filenames_and_next()
817 for filename in filenames:
818 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
819 with open(filename, 'rb') as f:
822 type_id_str, data_hex = line.strip().split(' ')
823 type_id = int(type_id_str)
829 verified_hash = int(data_hex, 16)
830 yield 'verified_hash', verified_hash
831 verified_hashes.add(verified_hash)
833 raw_share = share_type.unpack(data_hex.decode('hex'))
834 if raw_share['type'] in [0, 1, 2, 3, 6, 7]:
836 share = load_share(raw_share, self.net, None)
838 share_hashes.add(share.hash)
840 raise NotImplementedError("share type %i" % (type_id,))
842 log.err(None, "HARMLESS error while reading saved shares, continuing where left off:")
844 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
846 def _add_line(self, line):
847 filenames, next = self.get_filenames_and_next()
848 if filenames and os.path.getsize(filenames[-1]) < 10e6:
849 filename = filenames[-1]
853 with open(filename, 'ab') as f:
858 def add_share(self, share):
859 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
860 if share.hash in share_hashes:
863 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
864 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
865 share_hashes.add(share.hash)
866 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
867 share_hashes.add(share.hash)
869 def add_verified_hash(self, share_hash):
870 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
871 if share_hash in verified_hashes:
874 filename = self._add_line("%i %x" % (2, share_hash))
875 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
876 verified_hashes.add(share_hash)
877 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
878 verified_hashes.add(share_hash)
880 def get_filenames_and_next(self):
881 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())
882 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)))
884 def forget_share(self, share_hash):
885 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
886 if share_hash in share_hashes:
887 share_hashes.remove(share_hash)
890 def forget_verified_share(self, share_hash):
891 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
892 if share_hash in verified_hashes:
893 verified_hashes.remove(share_hash)
896 def check_remove(self):
898 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
899 #print filename, len(share_hashes) + len(verified_hashes)
900 if not share_hashes and not verified_hashes:
901 to_remove.add(filename)
902 for filename in to_remove:
903 self.known.pop(filename)
904 self.known_desired.pop(filename)
906 print "REMOVED", filename