elif share['type'] == 5:
share1b = Share.share1b_type.unpack(share['contents'])
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)
+ elif share['type'] == 8:
+ return NewShare(net, peer, NewShare.share_type.unpack(share['contents']))
else:
raise ValueError('unknown share type: %r' % (share['type'],))
share_info=share_info,
))), ref_merkle_link))
- __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 time_seen'.split(' ')
+ __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(' ')
def __init__(self, net, peer, common, merkle_link, other_txs):
self.net = net
if other_txs is None and self.pow_hash <= self.header['bits'].target:
raise ValueError('other_txs not provided when a block solution')
+ self.new_transaction_hashes = []
+
# XXX eww
self.time_seen = time.time()
raise ValueError('share does not contain all txs')
return dict(header=self.header, txs=[self.check(tracker)] + self.other_txs)
+class NewShare(object):
+ 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.ComposedType([ # compressed by referencing previous shares' hashes
+ ('share_count', pack.VarIntType()),
+ ('tx_count', pack.VarIntType()),
+ ]))),
+ ('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)),
+ ])),
+ ('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('\x20' + pack.IntType(256).pack(0))[:2]
+
+ @classmethod
+ def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes, net):
+ 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, (0, 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)))
+
+ 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
+
+ new_transaction_hashes = []
+ transaction_hash_refs = []
+ other_transaction_hashes = []
+
+ for tx_hash in desired_other_transaction_hashes:
+ for i, share in enumerate(tracker.get_chain(share_data['previous_share_hash'], min(height, 100))):
+ if tx_hash in share.new_transaction_hashes:
+ this = dict(share_count=i+1, tx_count=share.new_transaction_hashes.index(tx_hash))
+ break
+ else:
+ if len(new_transaction_hashes) == 10: # only allow 10 new txns/share
+ break
+ new_transaction_hashes.append(tx_hash)
+ this = dict(share_count=0, tx_count=len(new_transaction_hashes)-1)
+ transaction_hash_refs.append(this)
+ other_transaction_hashes.append(tx_hash)
+
+ 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='\x20' + cls.get_ref_hash(net, share_info, ref_merkle_link),
+ )],
+ lock_time=0,
+ )
+
+ def get_share(header, transactions):
+ min_header=dict(header);del min_header['merkle_root']
+ return cls(net, None, dict(
+ min_header=min_header,
+ share_info=share_info,
+ ref_merkle_link=dict(branch=[], index=0),
+ hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4], cls.gentx_before_refhash),
+ merkle_link=bitcoin_data.calculate_merkle_link([None] + other_transaction_hashes, 0),
+ ))
+
+ 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 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(' ')
+
+ def __init__(self, net, peer, contents):
+ self.net = net
+ self.peer = peer
+ 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']
+
+ for x in self.share_info['transaction_hash_refs']:
+ assert x['share_count'] < net.CHAIN_LENGTH
+
+ 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(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, self.contents))
+
+ def as_share(self):
+ return dict(type=8, contents=self.share_type.pack(self.contents))
+
+ def check(self, tracker):
+ 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']]
+
+ 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)
+ 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] + other_txs # only used by as_block
+
+ def as_block(self, tracker):
+ assert False
+ return dict(header=self.header, txs=self.check(tracker))
+
+
class WeightsSkipList(forest.TrackerSkipList):
# share_count, weights, total_weight
git://git.novaco.in / p2pool.git / commitdiff