return None # not all txs present
return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
+class Share(object):
+ VERSION = 9
+ VOTING_VERSION = 11
+ SUCCESSOR = None
+
+ small_block_header_type = pack.ComposedType([
+ ('version', pack.VarIntType()),
+ ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
+ ('timestamp', pack.IntType(32)),
+ ('bits', bitcoin_data.FloatingIntegerType()),
+ ('nonce', pack.IntType(32)),
+ ])
+
+ share_info_type = pack.ComposedType([
+ ('share_data', pack.ComposedType([
+ ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
+ ('coinbase', pack.VarStrType()),
+ ('nonce', pack.IntType(32)),
+ ('pubkey_hash', pack.IntType(160)),
+ ('subsidy', pack.IntType(64)),
+ ('donation', pack.IntType(16)),
+ ('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)))),
+ ('desired_version', pack.VarIntType()),
+ ])),
+ ('new_transaction_hashes', pack.ListType(pack.IntType(256))),
+ ('transaction_hash_refs', pack.ListType(pack.VarIntType(), 2)), # pairs of share_count, tx_count
+ ('far_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
+ ('max_bits', bitcoin_data.FloatingIntegerType()),
+ ('bits', bitcoin_data.FloatingIntegerType()),
+ ('timestamp', pack.IntType(32)),
+ ])
+
+ share_type = pack.ComposedType([
+ ('min_header', small_block_header_type),
+ ('share_info', share_info_type),
+ ('ref_merkle_link', pack.ComposedType([
+ ('branch', pack.ListType(pack.IntType(256))),
+ ('index', pack.IntType(0)),
+ ])),
+ ('last_txout_nonce', pack.IntType(32)),
+ ('hash_link', hash_link_type),
+ ('merkle_link', pack.ComposedType([
+ ('branch', pack.ListType(pack.IntType(256))),
+ ('index', pack.IntType(0)), # it will always be 0
+ ])),
+ ])
+
+ ref_type = pack.ComposedType([
+ ('identifier', pack.FixedStrType(64//8)),
+ ('share_info', share_info_type),
+ ])
+
+ 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]
+
+ @classmethod
+ def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes_and_fees, net, known_txs=None, last_txout_nonce=0, base_subsidy=None):
+ previous_share = tracker.items[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None
+
+ height, last = tracker.get_height_and_last(share_data['previous_share_hash'])
+ assert height >= net.REAL_CHAIN_LENGTH or last is None
+ if height < net.TARGET_LOOKBEHIND:
+ pre_target3 = net.MAX_TARGET
+ else:
+ attempts_per_second = get_pool_attempts_per_second(tracker, share_data['previous_share_hash'], net.TARGET_LOOKBEHIND, min_work=True, integer=True)
+ pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 if attempts_per_second else 2**256-1
+ pre_target2 = math.clip(pre_target, (previous_share.max_target*9//10, previous_share.max_target*11//10))
+ pre_target3 = math.clip(pre_target2, (net.MIN_TARGET, net.MAX_TARGET))
+ max_bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
+ bits = bitcoin_data.FloatingInteger.from_target_upper_bound(math.clip(desired_target, (pre_target3//10, pre_target3)))
+
+ new_transaction_hashes = []
+ new_transaction_size = 0
+ transaction_hash_refs = []
+ other_transaction_hashes = []
+
+ past_shares = list(tracker.get_chain(share_data['previous_share_hash'], min(height, 100)))
+ tx_hash_to_this = {}
+ for i, share in enumerate(past_shares):
+ for j, tx_hash in enumerate(share.new_transaction_hashes):
+ if tx_hash not in tx_hash_to_this:
+ tx_hash_to_this[tx_hash] = [1+i, j] # share_count, tx_count
+ for tx_hash, fee in desired_other_transaction_hashes_and_fees:
+ if tx_hash in tx_hash_to_this:
+ this = tx_hash_to_this[tx_hash]
+ else:
+ if known_txs is not None:
+ this_size = bitcoin_data.tx_type.packed_size(known_txs[tx_hash])
+ if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
+ break
+ new_transaction_size += this_size
+ new_transaction_hashes.append(tx_hash)
+ this = [0, len(new_transaction_hashes)-1]
+ transaction_hash_refs.extend(this)
+ other_transaction_hashes.append(tx_hash)
+
+ included_transactions = set(other_transaction_hashes)
+ removed_fees = [fee for tx_hash, fee in desired_other_transaction_hashes_and_fees if tx_hash not in included_transactions]
+ definite_fees = sum(0 if fee is None else fee for tx_hash, fee in desired_other_transaction_hashes_and_fees if tx_hash in included_transactions)
+ if None not in removed_fees:
+ share_data = dict(share_data, subsidy=share_data['subsidy'] - sum(removed_fees))
+ else:
+ assert base_subsidy is not None
+ share_data = dict(share_data, subsidy=base_subsidy + definite_fees)
+
+ weights, total_weight, donation_weight = tracker.get_cumulative_weights(share_data['previous_share_hash'],
+ min(height, net.REAL_CHAIN_LENGTH),
+ 65535*net.SPREAD*bitcoin_data.target_to_average_attempts(block_target),
+ )
+ assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
+
+ 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
+ this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
+ amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
+ 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
+
+ if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
+ raise ValueError()
+
+ dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
+
+ share_info = dict(
+ share_data=share_data,
+ far_share_hash=None if last is None and height < 99 else tracker.get_nth_parent_hash(share_data['previous_share_hash'], 99),
+ max_bits=max_bits,
+ bits=bits,
+ timestamp=math.clip(desired_timestamp, (
+ (previous_share.timestamp + net.SHARE_PERIOD) - (net.SHARE_PERIOD - 1), # = previous_share.timestamp + 1
+ (previous_share.timestamp + net.SHARE_PERIOD) + (net.SHARE_PERIOD - 1),
+ )) if previous_share is not None else desired_timestamp,
+ new_transaction_hashes=new_transaction_hashes,
+ transaction_hash_refs=transaction_hash_refs,
+ )
+
+ gentx = dict(
+ version=1,
+ tx_ins=[dict(
+ previous_output=None,
+ sequence=None,
+ script=share_data['coinbase'],
+ )],
+ tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script] or script == DONATION_SCRIPT] + [dict(
+ value=0,
+ script='\x24' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(32).pack(last_txout_nonce),
+ )],
+ lock_time=0,
+ )
+
+ def get_share(header, last_txout_nonce=last_txout_nonce):
+ min_header = dict(header); del min_header['merkle_root']
+ share = cls(net, None, dict(
+ min_header=min_header,
+ share_info=share_info,
+ ref_merkle_link=dict(branch=[], index=0),
+ last_txout_nonce=last_txout_nonce,
+ hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4-4], cls.gentx_before_refhash),
+ merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
+ ))
+ assert share.header == header # checks merkle_root
+ return share
+
+ return share_info, gentx, other_transaction_hashes, get_share
+
+ @classmethod
+ def get_ref_hash(cls, net, share_info, ref_merkle_link):
+ return pack.IntType(256).pack(bitcoin_data.check_merkle_link(bitcoin_data.hash256(cls.ref_type.pack(dict(
+ identifier=net.IDENTIFIER,
+ share_info=share_info,
+ ))), ref_merkle_link))
+
+ __slots__ = 'net peer_addr contents min_header share_info hash_link merkle_link hash share_data max_target target timestamp previous_hash new_script desired_version gentx_hash header pow_hash header_hash new_transaction_hashes time_seen'.split(' ')
+
+ def __init__(self, net, peer_addr, contents):
+ self.net = net
+ self.peer_addr = peer_addr
+ self.contents = contents
+
+ self.min_header = contents['min_header']
+ self.share_info = contents['share_info']
+ self.hash_link = contents['hash_link']
+ self.merkle_link = contents['merkle_link']
+
+ if not (2 <= len(self.share_info['share_data']['coinbase']) <= 100):
+ raise ValueError('''bad coinbase size! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
+
+ if len(self.merkle_link['branch']) > 16:
+ raise ValueError('merkle branch too long!')
+
+ assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data'])
+
+ self.share_data = self.share_info['share_data']
+ self.max_target = self.share_info['max_bits'].target
+ self.target = self.share_info['bits'].target
+ self.timestamp = self.share_info['timestamp']
+ self.previous_hash = self.share_data['previous_share_hash']
+ self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
+ self.desired_version = self.share_data['desired_version']
+
+ n = set()
+ for share_count, tx_count in self.iter_transaction_hash_refs():
+ assert share_count < 110
+ if share_count == 0:
+ n.add(tx_count)
+ assert n == set(range(len(self.share_info['new_transaction_hashes'])))
+
+ self.gentx_hash = check_hash_link(
+ self.hash_link,
+ 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),
+ self.gentx_before_refhash,
+ )
+ merkle_root = bitcoin_data.check_merkle_link(self.gentx_hash, self.merkle_link)
+ self.header = dict(self.min_header, merkle_root=merkle_root)
+ self.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(self.header))
+ self.hash = self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(self.header))
+
+ if self.target > net.MAX_TARGET:
+ from p2pool import p2p
+ raise p2p.PeerMisbehavingError('share target invalid')
+
+ if self.pow_hash > self.target:
+ from p2pool import p2p
+ raise p2p.PeerMisbehavingError('share PoW invalid')
+
+ self.new_transaction_hashes = self.share_info['new_transaction_hashes']
+
+ # XXX eww
+ self.time_seen = time.time()
+
+ def __repr__(self):
+ return 'Share' + repr((self.net, self.peer_addr, self.contents))
+
+ def as_share(self):
+ return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
+
+ def iter_transaction_hash_refs(self):
+ return zip(self.share_info['transaction_hash_refs'][::2], self.share_info['transaction_hash_refs'][1::2])
+
+ def check(self, tracker):
+ from p2pool import p2p
+ if self.share_data['previous_share_hash'] is not None:
+ previous_share = tracker.items[self.share_data['previous_share_hash']]
+ if type(self) is type(previous_share):
+ pass
+ elif type(self) is type(previous_share).SUCCESSOR:
+ if tracker.get_height(previous_share.hash) < self.net.CHAIN_LENGTH:
+ from p2pool import p2p
+ raise p2p.PeerMisbehavingError('switch without enough history')
+
+ # switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
+ counts = get_desired_version_counts(tracker,
+ tracker.get_nth_parent_hash(previous_share.hash, self.net.CHAIN_LENGTH*9//10), self.net.CHAIN_LENGTH//10)
+ if counts.get(self.VERSION, 0) < sum(counts.itervalues())*85//100:
+ raise p2p.PeerMisbehavingError('switch without enough hash power upgraded')
+ else:
+ raise p2p.PeerMisbehavingError('''%s can't follow %s''' % (type(self).__name__, type(previous_share).__name__))
+
+ other_tx_hashes = [tracker.items[tracker.get_nth_parent_hash(self.hash, share_count)].share_info['new_transaction_hashes'][tx_count] for share_count, tx_count in self.iter_transaction_hash_refs()]
+
+ share_info, gentx, other_tx_hashes2, get_share = self.generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.share_info['bits'].target, self.contents['ref_merkle_link'], [(h, None) for h in other_tx_hashes], self.net, last_txout_nonce=self.contents['last_txout_nonce'])
+ assert other_tx_hashes2 == other_tx_hashes
+ if share_info != self.share_info:
+ raise ValueError('share_info invalid')
+ if bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)) != self.gentx_hash:
+ raise ValueError('''gentx doesn't match hash_link''')
+
+ if bitcoin_data.calculate_merkle_link([None] + other_tx_hashes, 0) != self.merkle_link:
+ raise ValueError('merkle_link and other_tx_hashes do not match')
+
+ return gentx # only used by as_block
+
+ def get_other_tx_hashes(self, tracker):
+ parents_needed = max(share_count for share_count, tx_count in self.iter_transaction_hash_refs()) if self.share_info['transaction_hash_refs'] else 0
+ parents = tracker.get_height(self.hash) - 1
+ if parents < parents_needed:
+ return None
+ last_shares = list(tracker.get_chain(self.hash, parents_needed + 1))
+ return [last_shares[share_count].share_info['new_transaction_hashes'][tx_count] for share_count, tx_count in self.iter_transaction_hash_refs()]
+
+ def _get_other_txs(self, tracker, known_txs):
+ other_tx_hashes = self.get_other_tx_hashes(tracker)
+ if other_tx_hashes is None:
+ return None # not all parents present
+
+ if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
+ return None # not all txs present
+
+ return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
+
+ def should_punish_reason(self, previous_block, bits, tracker, known_txs):
+ if (self.header['previous_block'], self.header['bits']) != (previous_block, bits) and self.header_hash != previous_block and self.peer_addr is not None:
+ return True, 'Block-stale detected! %x < %x' % (self.header['previous_block'], previous_block)
+
+ if self.pow_hash <= self.header['bits'].target:
+ return -1, 'block solution'
+
+ other_txs = self._get_other_txs(tracker, known_txs)
+ if other_txs is None:
+ if self.time_seen != 0: # ignore if loaded from ShareStore
+ return True, 'not all txs present'
+ else:
+ all_txs_size = sum(bitcoin_data.tx_type.packed_size(tx) for tx in other_txs)
+ if all_txs_size > 1000000:
+ return True, 'txs over block size limit'
+
+ new_txs_size = sum(bitcoin_data.tx_type.packed_size(known_txs[tx_hash]) for tx_hash in self.share_info['new_transaction_hashes'])
+ if new_txs_size > 50000:
+ return True, 'new txs over limit'
+
+ return False, None
+
+ def as_block(self, tracker, known_txs):
+ other_txs = self._get_other_txs(tracker, known_txs)
+ if other_txs is None:
+ return None # not all txs present
+ return dict(header=self.header, txs=[self.check(tracker)] + other_txs)
+
+
class WeightsSkipList(forest.TrackerSkipList):
# share_count, weights, total_weight
git://git.novaco.in / p2pool.git / commitdiff