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]:
44 from p2pool import p2p
45 raise p2p.PeerMisbehavingError('sent an obsolete share')
46 elif share['type'] == 4:
47 return Share(net, peer, other_txs=None, **Share.share1a_type.unpack(share['contents']))
48 elif share['type'] == 5:
49 share1b = Share.share1b_type.unpack(share['contents'])
50 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)
51 elif share['type'] == NewShare.VERSION:
52 return NewShare(net, peer, NewShare.share_type.unpack(share['contents']))
53 elif share['type'] == NewNewShare.VERSION:
54 return NewNewShare(net, peer, NewNewShare.share_type.unpack(share['contents']))
56 raise ValueError('unknown share type: %r' % (share['type'],))
58 DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
60 class NewNewShare(object):
66 small_block_header_type = pack.ComposedType([
67 ('version', pack.VarIntType()),
68 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
69 ('timestamp', pack.IntType(32)),
70 ('bits', bitcoin_data.FloatingIntegerType()),
71 ('nonce', pack.IntType(32)),
74 share_info_type = pack.ComposedType([
75 ('share_data', pack.ComposedType([
76 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
77 ('coinbase', pack.VarStrType()),
78 ('nonce', pack.IntType(32)),
79 ('pubkey_hash', pack.IntType(160)),
80 ('subsidy', pack.IntType(64)),
81 ('donation', pack.IntType(16)),
82 ('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)))),
83 ('desired_version', pack.VarIntType()),
85 ('new_transaction_hashes', pack.ListType(pack.IntType(256))),
86 ('transaction_hash_refs', pack.ListType(pack.ComposedType([ # compressed by referencing previous shares' hashes
87 ('share_count', pack.VarIntType()),
88 ('tx_count', pack.VarIntType()),
90 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
91 ('max_bits', bitcoin_data.FloatingIntegerType()),
92 ('bits', bitcoin_data.FloatingIntegerType()),
93 ('timestamp', pack.IntType(32)),
96 share_type = pack.ComposedType([
97 ('min_header', small_block_header_type),
98 ('share_info', share_info_type),
99 ('ref_merkle_link', pack.ComposedType([
100 ('branch', pack.ListType(pack.IntType(256))),
101 ('index', pack.IntType(0)),
103 ('last_txout_nonce', pack.IntType(32)),
104 ('hash_link', hash_link_type),
105 ('merkle_link', pack.ComposedType([
106 ('branch', pack.ListType(pack.IntType(256))),
107 ('index', pack.IntType(0)), # it will always be 0
111 ref_type = pack.ComposedType([
112 ('identifier', pack.FixedStrType(64//8)),
113 ('share_info', share_info_type),
116 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]
119 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):
120 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
122 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
123 assert height >= net.REAL_CHAIN_LENGTH or last is None
124 if height < net.TARGET_LOOKBEHIND:
125 pre_target3 = net.MAX_TARGET
127 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
128 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
129 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
130 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
131 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
132 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
134 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
135 min(height, net.REAL_CHAIN_LENGTH),
136 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
138 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
140 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
141 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
142 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
143 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
145 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
148 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
150 new_transaction_hashes = []
151 new_transaction_size = 0
152 transaction_hash_refs = []
153 other_transaction_hashes = []
155 for tx_hash in desired_other_transaction_hashes:
156 for i, share in enumerate(tracker.get_chain(share_data['previous_share_hash'], min(height, 100))):
157 if tx_hash in share.new_transaction_hashes:
158 this = dict(share_count=i+1, tx_count=share.new_transaction_hashes.index(tx_hash))
161 if known_txs is not None:
162 this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
163 if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
165 new_transaction_size += this_size
166 new_transaction_hashes.append(tx_hash)
167 this = dict(share_count=0, tx_count=len(new_transaction_hashes)-1)
168 transaction_hash_refs.append(this)
169 other_transaction_hashes.append(tx_hash)
172 share_data=share_data,
173 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
176 timestamp=math.clip(desired_timestamp, (
177 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
178 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
179 )) if previous_share is not None else desired_timestamp,
180 new_transaction_hashes=new_transaction_hashes,
181 transaction_hash_refs=transaction_hash_refs,
187 previous_output=None,
189 script=share_data['coinbase'],
191 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
193 script='\x24' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(32).pack(last_txout_nonce),
198 def get_share(header, transactions):
199 min_header=dict(header);del min_header['merkle_root']
200 return cls(net, None, dict(
201 min_header=min_header,
202 share_info=share_info,
203 ref_merkle_link=dict(branch=[], index=0),
204 last_txout_nonce=last_txout_nonce,
205 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4-4], cls.gentx_before_refhash),
206 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
209 return share_info, gentx, other_transaction_hashes, get_share
212 def get_ref_hash(cls, net, share_info, ref_merkle_link):
213 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
214 identifier=net.IDENTIFIER,
215 share_info=share_info,
216 ))), ref_merkle_link))
218 __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(' ')
220 def __init__(self, net, peer, contents):
223 self.contents = contents
225 self.min_header = contents['min_header']
226 self.share_info = contents['share_info']
227 self.hash_link = contents['hash_link']
228 self.merkle_link = contents['merkle_link']
230 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
231 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
233 if len(self.merkle_link['branch']) > 16:
234 raise ValueError('merkle branch too long!')
236 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
238 self.share_data = self.share_info['share_data']
239 self.max_target = self.share_info['max_bits'].target
240 self.target = self.share_info['bits'].target
241 self.timestamp = self.share_info['timestamp']
242 self.previous_hash = self.share_data['previous_share_hash']
243 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
244 self.desired_version = self.share_data['desired_version']
246 for x in self.share_info['transaction_hash_refs']:
247 assert x['share_count'] < 110
248 for i, x in enumerate(self.share_info['new_transaction_hashes']):
249 assert dict(share_count=0, tx_count=i) in self.share_info['transaction_hash_refs']
251 self.gentx_hash = check_hash_link(
253 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),
254 self.gentx_before_refhash,
256 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
257 self.header = dict(self.min_header, merkle_root=merkle_root)
258 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
259 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
261 if self.target > net.MAX_TARGET:
262 from p2pool import p2p
263 raise p2p.PeerMisbehavingError('share target invalid')
265 if self.pow_hash > self.target:
266 from p2pool import p2p
267 raise p2p.PeerMisbehavingError('share PoW invalid')
269 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
272 self.time_seen = time.time()
275 return 'Share' + repr((self.net, self.peer, self.contents))
278 return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
280 def check(self, tracker):
281 from p2pool import p2p
282 if self.share_data['previous_share_hash'] is not None:
283 previous_share = tracker.items[self.share_data['previous_share_hash']]
284 if type(self) is type(previous_share):
286 elif type(self) is type(previous_share).SUCCESSOR:
287 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
288 from p2pool import p2p
289 raise p2p.PeerMisbehavingError('switch without enough history')
291 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
292 counts = get_desired_version_counts(tracker,
293 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
294 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
295 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
297 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
299 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']]
301 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'])
302 assert other_tx_hashes2 == other_tx_hashes
303 if share_info != self.share_info:
304 raise ValueError('share_info invalid')
305 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
306 raise ValueError('''gentx doesn't match hash_link''')
308 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
309 raise ValueError('merkle_link and other_tx_hashes do not match')
311 return gentx # only used by as_block
313 def get_other_tx_hashes(self, tracker):
314 parents = tracker.get_height(self.hash) - 1
315 if not all(x['share_count'] <= parents for x in self.share_info['transaction_hash_refs']):
317 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']]
319 def _get_other_txs(self, tracker, known_txs):
320 other_tx_hashes = self.get_other_tx_hashes(tracker)
321 if other_tx_hashes is None:
322 return None # not all parents present
324 if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
325 return None # not all txs present
327 return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
329 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
330 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer is not None:
331 return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
333 if self.pow_hash <= self.header['bits'].target:
334 return -1, 'block solution'
336 other_txs = self._get_other_txs(tracker, known_txs)
337 if other_txs is None:
338 return True, 'not all txs present'
340 all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
341 if all_txs_size > 1000000:
342 return True, 'txs over block size limit'
344 new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
345 if new_txs_size > 50000:
346 return True, 'new txs over limit'
350 def as_block(self, tracker, known_txs):
351 other_txs = self._get_other_txs(tracker, known_txs)
352 if other_txs is None:
353 return None # not all txs present
354 return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
358 SUCCESSOR = NewNewShare
360 small_block_header_type = pack.ComposedType([
361 ('version', pack.VarIntType()), # XXX must be constrained to 32 bits
362 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
363 ('timestamp', pack.IntType(32)),
364 ('bits', bitcoin_data.FloatingIntegerType()),
365 ('nonce', pack.IntType(32)),
368 share_data_type = pack.ComposedType([
369 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
370 ('coinbase', pack.VarStrType()),
371 ('nonce', pack.IntType(32)),
372 ('pubkey_hash', pack.IntType(160)),
373 ('subsidy', pack.IntType(64)),
374 ('donation', pack.IntType(16)),
375 ('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)))),
376 ('desired_version', pack.VarIntType()),
379 share_info_type = pack.ComposedType([
380 ('share_data', share_data_type),
381 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
382 ('max_bits', bitcoin_data.FloatingIntegerType()),
383 ('bits', bitcoin_data.FloatingIntegerType()),
384 ('timestamp', pack.IntType(32)),
387 share_common_type = pack.ComposedType([
388 ('min_header', small_block_header_type),
389 ('share_info', share_info_type),
390 ('ref_merkle_link', pack.ComposedType([
391 ('branch', pack.ListType(pack.IntType(256))),
392 ('index', pack.VarIntType()),
394 ('hash_link', hash_link_type),
396 share1a_type = pack.ComposedType([
397 ('common', share_common_type),
398 ('merkle_link', pack.ComposedType([
399 ('branch', pack.ListType(pack.IntType(256))),
400 ('index', pack.IntType(0)), # it will always be 0
403 share1b_type = pack.ComposedType([
404 ('common', share_common_type),
405 ('other_txs', pack.ListType(bitcoin_data.tx_type)),
408 ref_type = pack.ComposedType([
409 ('identifier', pack.FixedStrType(64//8)),
410 ('share_info', share_info_type),
413 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x20' + pack.IntType(256).pack(0))[:2]
416 def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes, net, known_txs=None):
417 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
419 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
420 assert height >= net.REAL_CHAIN_LENGTH or last is None
421 if height < net.TARGET_LOOKBEHIND:
422 pre_target3 = net.MAX_TARGET
424 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
425 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
426 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
427 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
428 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
429 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
431 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
432 min(height, net.REAL_CHAIN_LENGTH),
433 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
435 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
437 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
438 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
439 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
440 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
442 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
445 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
448 share_data=share_data,
449 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
452 timestamp=math.clip(desired_timestamp, (
453 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
454 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
455 )) if previous_share is not None else desired_timestamp,
461 previous_output=None,
463 script=share_data['coinbase'].ljust(2, '\x00'),
465 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
467 script='\x20' + cls.get_ref_hash(net, share_info, ref_merkle_link),
472 def get_share(header, transactions):
473 assert transactions[0] == gentx and [bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx)) for tx in transactions[1:]] == desired_other_transaction_hashes
474 min_header = dict(header);del min_header['merkle_root']
475 hash_link = prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4], cls.gentx_before_refhash)
476 merkle_link = bitcoin_data.calculate_merkle_link([None] + desired_other_transaction_hashes, 0)
477 pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header))
478 return cls(net, None, dict(
479 min_header=min_header, share_info=share_info, hash_link=hash_link,
480 ref_merkle_link=dict(branch=[], index=0),
481 ), merkle_link=merkle_link, other_txs=transactions[1:] if pow_hash <= header['bits'].target else None)
483 return share_info, gentx, desired_other_transaction_hashes, get_share
486 def get_ref_hash(cls, net, share_info, ref_merkle_link):
487 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
488 identifier=net.IDENTIFIER,
489 share_info=share_info,
490 ))), ref_merkle_link))
492 __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(' ')
494 def __init__(self, net, peer, common, merkle_link, other_txs):
498 self.min_header = common['min_header']
499 self.share_info = common['share_info']
500 self.hash_link = common['hash_link']
501 self.merkle_link = merkle_link
502 self.other_txs = other_txs
504 if len(self.share_info['share_data']['coinbase']) > 100:
505 raise ValueError('''coinbase too large! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
507 if len(merkle_link['branch']) > 16:
508 raise ValueError('merkle branch too long!')
510 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:
511 raise ValueError('merkle_link and other_txs do not match')
513 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
515 self.share_data = self.share_info['share_data']
516 self.max_target = self.share_info['max_bits'].target
517 self.target = self.share_info['bits'].target
518 self.timestamp = self.share_info['timestamp']
519 self.previous_hash = self.share_data['previous_share_hash']
520 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
521 self.desired_version = self.share_data['desired_version']
523 self.gentx_hash = check_hash_link(
525 self.get_ref_hash(net, self.share_info, common['ref_merkle_link']) + pack.IntType(32).pack(0),
526 self.gentx_before_refhash,
528 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, merkle_link)
529 self.header = dict(self.min_header, merkle_root=merkle_root)
530 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
531 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
533 if self.pow_hash > self.target:
534 from p2pool import p2p
535 raise p2p.PeerMisbehavingError('share PoW invalid')
537 if other_txs is not None and not self.pow_hash <= self.header['bits'].target:
538 raise ValueError('other_txs provided when not a block solution')
539 if other_txs is None and self.pow_hash <= self.header['bits'].target:
540 raise ValueError('other_txs not provided when a block solution')
542 self.new_transaction_hashes = []
545 self.time_seen = time.time()
548 return '<Share %s>' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),)
550 def as_share1a(self):
551 return dict(type=4, contents=self.share1a_type.pack(dict(common=self.common, merkle_link=self.merkle_link)))
553 def as_share1b(self):
554 return dict(type=5, contents=self.share1b_type.pack(dict(common=self.common, other_txs=self.other_txs)))
557 if not self.pow_hash <= self.header['bits'].target: # share1a
558 return self.as_share1a()
560 return self.as_share1b()
562 def check(self, tracker):
563 from p2pool import p2p
564 if self.share_data['previous_share_hash'] is not None:
565 previous_share = tracker.items[self.share_data['previous_share_hash']]
566 if type(self) is type(previous_share):
568 elif type(self) is type(previous_share).SUCCESSOR:
569 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
570 from p2pool import p2p
571 raise p2p.PeerMisbehavingError('switch without enough history')
573 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
574 counts = get_desired_version_counts(tracker,
575 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
576 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
577 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
579 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
581 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
582 if share_info != self.share_info:
583 raise ValueError('share_info invalid')
584 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
585 raise ValueError('''gentx doesn't match hash_link''')
586 return gentx # only used by as_block
588 def get_other_tx_hashes(self, tracker):
591 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
592 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer is not None:
593 return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
595 if self.pow_hash <= self.header['bits'].target:
596 return -1, 'block solution'
600 def as_block(self, tracker, known_txs):
601 if self.other_txs is None:
602 raise ValueError('share does not contain all txs')
603 return dict(header=self.header, txs=[self.check(tracker)] + self.other_txs)
605 class NewShare(object):
607 SUCCESSOR = NewNewShare
611 small_block_header_type = pack.ComposedType([
612 ('version', pack.VarIntType()),
613 ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
614 ('timestamp', pack.IntType(32)),
615 ('bits', bitcoin_data.FloatingIntegerType()),
616 ('nonce', pack.IntType(32)),
619 share_info_type = pack.ComposedType([
620 ('share_data', pack.ComposedType([
621 ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
622 ('coinbase', pack.VarStrType()),
623 ('nonce', pack.IntType(32)),
624 ('pubkey_hash', pack.IntType(160)),
625 ('subsidy', pack.IntType(64)),
626 ('donation', pack.IntType(16)),
627 ('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)))),
628 ('desired_version', pack.VarIntType()),
630 ('new_transaction_hashes', pack.ListType(pack.IntType(256))),
631 ('transaction_hash_refs', pack.ListType(pack.ComposedType([ # compressed by referencing previous shares' hashes
632 ('share_count', pack.VarIntType()),
633 ('tx_count', pack.VarIntType()),
635 ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
636 ('max_bits', bitcoin_data.FloatingIntegerType()),
637 ('bits', bitcoin_data.FloatingIntegerType()),
638 ('timestamp', pack.IntType(32)),
641 share_type = pack.ComposedType([
642 ('min_header', small_block_header_type),
643 ('share_info', share_info_type),
644 ('ref_merkle_link', pack.ComposedType([
645 ('branch', pack.ListType(pack.IntType(256))),
646 ('index', pack.IntType(0)),
648 ('hash_link', hash_link_type),
649 ('merkle_link', pack.ComposedType([
650 ('branch', pack.ListType(pack.IntType(256))),
651 ('index', pack.IntType(0)), # it will always be 0
655 ref_type = pack.ComposedType([
656 ('identifier', pack.FixedStrType(64//8)),
657 ('share_info', share_info_type),
660 gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x20' + pack.IntType(256).pack(0))[:2]
663 def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes, net, known_txs=None):
664 previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
666 height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
667 assert height >= net.REAL_CHAIN_LENGTH or last is None
668 if height < net.TARGET_LOOKBEHIND:
669 pre_target3 = net.MAX_TARGET
671 attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
672 pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
673 pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
674 pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
675 max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
676 bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
678 weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
679 min(height, net.REAL_CHAIN_LENGTH),
680 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
682 assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
684 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
685 this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
686 amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
687 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
689 if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
692 dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
694 new_transaction_hashes = []
695 new_transaction_size = 0
696 transaction_hash_refs = []
697 other_transaction_hashes = []
699 for tx_hash in desired_other_transaction_hashes:
700 for i, share in enumerate(tracker.get_chain(share_data['previous_share_hash'], min(height, 100))):
701 if tx_hash in share.new_transaction_hashes:
702 this = dict(share_count=i+1, tx_count=share.new_transaction_hashes.index(tx_hash))
705 if known_txs is not None:
706 this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
707 if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
709 new_transaction_size += this_size
710 new_transaction_hashes.append(tx_hash)
711 this = dict(share_count=0, tx_count=len(new_transaction_hashes)-1)
712 transaction_hash_refs.append(this)
713 other_transaction_hashes.append(tx_hash)
716 share_data=share_data,
717 far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
720 timestamp=math.clip(desired_timestamp, (
721 (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
722 (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
723 )) if previous_share is not None else desired_timestamp,
724 new_transaction_hashes=new_transaction_hashes,
725 transaction_hash_refs=transaction_hash_refs,
731 previous_output=None,
733 script=share_data['coinbase'],
735 tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
737 script='\x20' + cls.get_ref_hash(net, share_info, ref_merkle_link),
742 def get_share(header, transactions):
743 min_header=dict(header);del min_header['merkle_root']
744 return cls(net, None, dict(
745 min_header=min_header,
746 share_info=share_info,
747 ref_merkle_link=dict(branch=[], index=0),
748 hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4], cls.gentx_before_refhash),
749 merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
752 return share_info, gentx, other_transaction_hashes, get_share
755 def get_ref_hash(cls, net, share_info, ref_merkle_link):
756 return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
757 identifier=net.IDENTIFIER,
758 share_info=share_info,
759 ))), ref_merkle_link))
761 __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(' ')
763 def __init__(self, net, peer, contents):
766 self.contents = contents
768 self.min_header = contents['min_header']
769 self.share_info = contents['share_info']
770 self.hash_link = contents['hash_link']
771 self.merkle_link = contents['merkle_link']
773 if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
774 raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
776 if len(self.merkle_link['branch']) > 16:
777 raise ValueError('merkle branch too long!')
779 assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
781 self.share_data = self.share_info['share_data']
782 self.max_target = self.share_info['max_bits'].target
783 self.target = self.share_info['bits'].target
784 self.timestamp = self.share_info['timestamp']
785 self.previous_hash = self.share_data['previous_share_hash']
786 self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
787 self.desired_version = self.share_data['desired_version']
789 for x in self.share_info['transaction_hash_refs']:
790 assert x['share_count'] < 110
791 for i, x in enumerate(self.share_info['new_transaction_hashes']):
792 assert dict(share_count=0, tx_count=i) in self.share_info['transaction_hash_refs']
794 self.gentx_hash = check_hash_link(
796 self.get_ref_hash(net, self.share_info, contents['ref_merkle_link']) + pack.IntType(32).pack(0),
797 self.gentx_before_refhash,
799 merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
800 self.header = dict(self.min_header, merkle_root=merkle_root)
801 self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
802 self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
804 if self.target > net.MAX_TARGET:
805 from p2pool import p2p
806 raise p2p.PeerMisbehavingError('share target invalid')
808 if self.pow_hash > self.target:
809 from p2pool import p2p
810 raise p2p.PeerMisbehavingError('share PoW invalid')
812 self.new_transaction_hashes = self.share_info['new_transaction_hashes']
815 self.time_seen = time.time()
818 return 'Share' + repr((self.net, self.peer, self.contents))
821 return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
823 def check(self, tracker):
824 from p2pool import p2p
825 if self.share_data['previous_share_hash'] is not None:
826 previous_share = tracker.items[self.share_data['previous_share_hash']]
827 if type(self) is type(previous_share):
829 elif type(self) is type(previous_share).SUCCESSOR:
830 if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
831 from p2pool import p2p
832 raise p2p.PeerMisbehavingError('switch without enough history')
834 # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
835 counts = get_desired_version_counts(tracker,
836 tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
837 if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
838 raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
840 raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
842 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']]
844 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)
845 assert other_tx_hashes2 == other_tx_hashes
846 if share_info != self.share_info:
847 raise ValueError('share_info invalid')
848 if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
849 raise ValueError('''gentx doesn't match hash_link''')
851 if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
852 raise ValueError('merkle_link and other_tx_hashes do not match')
854 return gentx # only used by as_block
856 def get_other_tx_hashes(self, tracker):
857 parents = tracker.get_height(self.hash) - 1
858 if not all(x['share_count'] <= parents for x in self.share_info['transaction_hash_refs']):
860 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']]
862 def _get_other_txs(self, tracker, known_txs):
863 other_tx_hashes = self.get_other_tx_hashes(tracker)
864 if other_tx_hashes is None:
865 return None # not all parents present
867 if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
868 return None # not all txs present
870 return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
872 def should_punish_reason(self, previous_block, bits, tracker, known_txs):
873 if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer is not None:
874 return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
876 if self.pow_hash <= self.header['bits'].target:
877 return -1, 'block solution'
879 other_txs = self._get_other_txs(tracker, known_txs)
880 if other_txs is None:
881 return True, 'not all txs present'
883 all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
884 if all_txs_size > 1000000:
885 return True, 'txs over block size limit'
887 new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
888 if new_txs_size > 50000:
889 return True, 'new txs over limit'
893 def as_block(self, tracker, known_txs):
894 other_txs = self._get_other_txs(tracker, known_txs)
895 if other_txs is None:
896 return None # not all txs present
897 return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
900 class WeightsSkipList(forest.TrackerSkipList):
901 # share_count, weights, total_weight
903 def get_delta(self, element):
904 from p2pool.bitcoin import data as bitcoin_data
905 share = self.tracker.items[element]
906 att = bitcoin_data.target_to_average_attempts(share.target)
907 return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation']
909 def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)):
910 return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
912 def initial_solution(self, start, (max_shares, desired_weight)):
913 assert desired_weight % 65535 == 0, divmod(desired_weight, 65535)
916 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)):
917 if total_weight1 + total_weight2 > desired_weight and share_count2 == 1:
918 assert (desired_weight - total_weight1) % 65535 == 0
919 script, = weights2.iterkeys()
920 new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)}
921 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)
922 return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2
924 def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
925 if share_count > max_shares or total_weight > desired_weight:
927 elif share_count == max_shares or total_weight == desired_weight:
932 def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)):
933 assert share_count <= max_shares and total_weight <= desired_weight
934 assert share_count == max_shares or total_weight == desired_weight
935 return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
937 class OkayTracker(forest.Tracker):
938 def __init__(self, net):
939 forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
940 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
941 min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
944 self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
945 work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
947 self.get_cumulative_weights = WeightsSkipList(self)
949 def attempt_verify(self, share):
950 if share.hash in self.verified.items:
952 height, last = self.get_height_and_last(share.hash)
953 if height < self.net.CHAIN_LENGTH + 1 and last is not None:
954 raise AssertionError()
958 log.err(None, 'Share check failed:')
961 self.verified.add(share)
964 def think(self, block_rel_height_func, previous_block, bits, known_txs):
968 # make 'unverified heads' set?
969 # for each overall head, attempt verification
970 # if it fails, attempt on parent, and repeat
971 # if no successful verification because of lack of parents, request parent
973 for head in set(self.heads) - set(self.verified.heads):
974 head_height, last = self.get_height_and_last(head)
976 for share in self.get_chain(head, head_height if last is None else min(5, max(0, head_height - self.net.CHAIN_LENGTH))):
977 if self.attempt_verify(share):
979 if share.hash in self.heads:
984 self.items[random.choice(list(self.reverse[last]))].peer,
986 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
987 min(x.target for x in self.get_chain(head, min(head_height, 5))),
990 assert bad not in self.verified.items
991 assert bad in self.heads
996 # try to get at least CHAIN_LENGTH height for each verified head, requesting parents if needed
997 for head in list(self.verified.heads):
998 head_height, last_hash = self.verified.get_height_and_last(head)
999 last_height, last_last_hash = self.get_height_and_last(last_hash)
1000 # XXX review boundary conditions
1001 want = max(self.net.CHAIN_LENGTH - head_height, 0)
1002 can = max(last_height - 1 - self.net.CHAIN_LENGTH, 0) if last_last_hash is not None else last_height
1003 get = min(want, can)
1004 #print 'Z', head_height, last_hash is None, last_height, last_last_hash is None, want, can, get
1005 for share in self.get_chain(last_hash, get):
1006 if not self.attempt_verify(share):
1008 if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
1010 self.items[random.choice(list(self.verified.reverse[last_hash]))].peer,
1012 max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
1013 min(x.target for x in self.get_chain(head, min(head_height, 5))),
1017 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)
1019 print len(decorated_tails), 'tails:'
1020 for score, tail_hash in decorated_tails:
1021 print format_hash(tail_hash), score
1022 best_tail_score, best_tail = decorated_tails[-1] if decorated_tails else (None, None)
1024 # decide best verified head
1025 decorated_heads = sorted(((
1026 self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
1027 #self.items[h].peer is None,
1028 -self.items[h].should_punish_reason(previous_block, bits, self, known_txs)[0],
1029 -self.items[h].time_seen,
1030 ), h) for h in self.verified.tails.get(best_tail, []))
1032 print len(decorated_heads), 'heads. Top 10:'
1033 for score, head_hash in decorated_heads[-10:]:
1034 print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
1035 best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
1037 if best is not None:
1038 best_share = self.items[best]
1039 punish, punish_reason = best_share.should_punish_reason(previous_block, bits, self, known_txs)
1041 print 'Punishing share for %r! Jumping from %s to %s!' % (punish_reason, format_hash(best), format_hash(best_share.previous_hash))
1042 best = best_share.previous_hash
1044 timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
1045 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
1047 timestamp_cutoff = int(time.time()) - 24*60*60
1048 target_cutoff = 2**256-1
1051 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))
1052 for peer, hash, ts, targ in desired:
1053 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
1055 return best, [(peer, hash) for peer, hash, ts, targ in desired if ts >= timestamp_cutoff], decorated_heads
1057 def score(self, share_hash, block_rel_height_func):
1058 # returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
1060 head_height = self.verified.get_height(share_hash)
1061 if head_height < self.net.CHAIN_LENGTH:
1062 return head_height, None
1064 end_point = self.verified.get_nth_parent_hash(share_hash, self.net.CHAIN_LENGTH*15//16)
1066 block_height = max(block_rel_height_func(share.header['previous_block']) for share in
1067 self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
1069 return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work//((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
1071 def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
1073 near = tracker.items[previous_share_hash]
1074 far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)]
1075 attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work
1076 time = near.timestamp - far.timestamp
1080 return attempts//time
1081 return attempts/time
1083 def get_average_stale_prop(tracker, share_hash, lookbehind):
1084 stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None)
1085 return stales/(lookbehind + stales)
1087 def get_stale_counts(tracker, share_hash, lookbehind, rates=False):
1089 for share in tracker.get_chain(share_hash, lookbehind - 1):
1090 res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target)
1091 s = share.share_data['stale_info']
1093 res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target)
1095 dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp
1096 res = dict((k, v/dt) for k, v in res.iteritems())
1099 def get_user_stale_props(tracker, share_hash, lookbehind):
1101 for share in tracker.get_chain(share_hash, lookbehind - 1):
1102 stale, total = res.get(share.share_data['pubkey_hash'], (0, 0))
1104 if share.share_data['stale_info'] is not None:
1107 res[share.share_data['pubkey_hash']] = stale, total
1108 return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems())
1110 def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net):
1111 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))
1112 res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
1113 res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues())
1116 def get_desired_version_counts(tracker, best_share_hash, dist):
1118 for share in tracker.get_chain(best_share_hash, dist):
1119 res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target)
1122 def get_warnings(tracker, best_share, net, bitcoind_warning, bitcoind_work_value):
1125 desired_version_counts = get_desired_version_counts(tracker, best_share,
1126 min(net.CHAIN_LENGTH, 60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
1127 majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
1128 if majority_desired_version > NewNewShare.VERSION and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
1129 res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
1130 'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
1131 majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
1133 if bitcoind_warning is not None:
1134 if 'This is a pre-release test build' not in bitcoind_warning:
1135 res.append('(from bitcoind) %s' % (bitcoind_warning,))
1137 if time.time() > bitcoind_work_value['last_update'] + 60:
1138 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']),))
1145 return '%08x' % (x % 2**32)
1147 class ShareStore(object):
1148 def __init__(self, prefix, net):
1149 self.filename = prefix
1150 self.dirname = os.path.dirname(os.path.abspath(prefix))
1151 self.filename = os.path.basename(os.path.abspath(prefix))
1153 self.known = None # will be filename -> set of share hashes, set of verified hashes
1154 self.known_desired = None
1156 def get_shares(self):
1157 if self.known is not None:
1158 raise AssertionError()
1160 filenames, next = self.get_filenames_and_next()
1161 for filename in filenames:
1162 share_hashes, verified_hashes = known.setdefault(filename, (set(), set()))
1163 with open(filename, 'rb') as f:
1166 type_id_str, data_hex = line.strip().split(' ')
1167 type_id = int(type_id_str)
1173 verified_hash = int(data_hex, 16)
1174 yield 'verified_hash', verified_hash
1175 verified_hashes.add(verified_hash)
1177 raw_share = share_type.unpack(data_hex.decode('hex'))
1178 if raw_share['type'] in [0, 1, 2, 3, 6, 7]:
1180 share = load_share(raw_share, self.net, None)
1181 yield 'share', share
1182 share_hashes.add(share.hash)
1184 raise NotImplementedError("share type %i" % (type_id,))
1186 log.err(None, "HARMLESS error while reading saved shares, continuing where left off:")
1188 self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())
1190 def _add_line(self, line):
1191 filenames, next = self.get_filenames_and_next()
1192 if filenames and os.path.getsize(filenames[-1]) < 10e6:
1193 filename = filenames[-1]
1197 with open(filename, 'ab') as f:
1198 f.write(line + '\n')
1202 def add_share(self, share):
1203 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
1204 if share.hash in share_hashes:
1207 filename = self._add_line("%i %s" % (5, share_type.pack(share.as_share()).encode('hex')))
1208 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
1209 share_hashes.add(share.hash)
1210 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
1211 share_hashes.add(share.hash)
1213 def add_verified_hash(self, share_hash):
1214 for filename, (share_hashes, verified_hashes) in self.known.iteritems():
1215 if share_hash in verified_hashes:
1218 filename = self._add_line("%i %x" % (2, share_hash))
1219 share_hashes, verified_hashes = self.known.setdefault(filename, (set(), set()))
1220 verified_hashes.add(share_hash)
1221 share_hashes, verified_hashes = self.known_desired.setdefault(filename, (set(), set()))
1222 verified_hashes.add(share_hash)
1224 def get_filenames_and_next(self):
1225 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())
1226 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)))
1228 def forget_share(self, share_hash):
1229 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
1230 if share_hash in share_hashes:
1231 share_hashes.remove(share_hash)
1234 def forget_verified_share(self, share_hash):
1235 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
1236 if share_hash in verified_hashes:
1237 verified_hashes.remove(share_hash)
1240 def check_remove(self):
1242 for filename, (share_hashes, verified_hashes) in self.known_desired.iteritems():
1243 #print filename, len(share_hashes) + len(verified_hashes)
1244 if not share_hashes and not verified_hashes:
1245 to_remove.add(filename)
1246 for filename in to_remove:
1247 self.known.pop(filename)
1248 self.known_desired.pop(filename)
1250 print "REMOVED", filename