import hashlib
import os
import random
+import sys
import time
from twisted.python import log
# shares
-# type:
-# 2: share1a
-# 3: share1b
-
share_type = pack.ComposedType([
('type', pack.VarIntType()),
('contents', pack.VarStrType()),
])
-def load_share(share, net, peer):
- if share['type'] in [0, 1, 2, 3]:
+def load_share(share, net, peer_addr):
+ assert peer_addr is None or isinstance(peer_addr, tuple)
+ if share['type'] < Share.VERSION:
from p2pool import p2p
raise p2p.PeerMisbehavingError('sent an obsolete share')
- elif share['type'] == 4:
- return Share(net, peer, other_txs=None, **Share.share1a_type.unpack(share['contents']))
- 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']))
+ elif share['type'] == Share.VERSION:
+ return Share(net, peer_addr, Share.share_type.unpack(share['contents']))
+ elif share['type'] == NewShare.VERSION:
+ return NewShare(net, peer_addr, NewShare.share_type.unpack(share['contents']))
else:
raise ValueError('unknown share type: %r' % (share['type'],))
DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex')
-class Share(object):
+class NewShare(object):
+ VERSION = 13
+ VOTING_VERSION = 13
+ SUCCESSOR = None
+
small_block_header_type = pack.ComposedType([
- ('version', pack.VarIntType()), # XXX must be constrained to 32 bits
+ ('version', pack.VarIntType()),
('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
('timestamp', pack.IntType(32)),
('bits', bitcoin_data.FloatingIntegerType()),
('nonce', pack.IntType(32)),
])
- share_data_type = 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()),
- ])
-
share_info_type = pack.ComposedType([
- ('share_data', share_data_type),
+ ('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)),
+ ('absheight', pack.IntType(32)),
+ ('abswork', pack.IntType(128)),
])
- share_common_type = pack.ComposedType([
+ 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.VarIntType()),
+ ('index', pack.IntType(0)),
])),
+ ('last_txout_nonce', pack.IntType(64)),
('hash_link', hash_link_type),
- ])
- share1a_type = pack.ComposedType([
- ('common', share_common_type),
('merkle_link', pack.ComposedType([
('branch', pack.ListType(pack.IntType(256))),
('index', pack.IntType(0)), # it will always be 0
])),
])
- share1b_type = pack.ComposedType([
- ('common', share_common_type),
- ('other_txs', pack.ListType(bitcoin_data.tx_type)),
- ])
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]
+ gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(0) + pack.VarStrType().pack('\x6a\x28' + pack.IntType(256).pack(0) + pack.IntType(64).pack(0))[:3]
@classmethod
- def generate_transaction(cls, tracker, share_data, block_target, desired_timestamp, desired_target, ref_merkle_link, desired_other_transaction_hashes, net):
+ 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'])
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_target = 2**256//(net.NEW_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))
+ 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)))
- 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),
+ 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(previous_share.share_data['previous_share_hash'] if previous_share is not None else None,
+ min(height, net.REAL_CHAIN_LENGTH-1),
+ 65535*net.NEW_SPREAD*bitcoin_data.target_to_average_attempts(block_target),
)
assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
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),
+ (previous_share.timestamp + net.NEW_SHARE_PERIOD) - (net.NEW_SHARE_PERIOD - 1), # = previous_share.timestamp + 1
+ (previous_share.timestamp + net.NEW_SHARE_PERIOD) + (net.NEW_SHARE_PERIOD - 1),
)) if previous_share is not None else desired_timestamp,
+ new_transaction_hashes=new_transaction_hashes,
+ transaction_hash_refs=transaction_hash_refs,
+ absheight=((previous_share.absheight if previous_share is not None else 0) + 1) % 2**32,
+ abswork=((previous_share.abswork if previous_share is not None else 0) + bitcoin_data.target_to_average_attempts(bits.target)) % 2**128,
)
gentx = dict(
tx_ins=[dict(
previous_output=None,
sequence=None,
- script=share_data['coinbase'].ljust(2, '\x00'),
+ 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),
+ script='\x6a\x28' + cls.get_ref_hash(net, share_info, ref_merkle_link) + pack.IntType(64).pack(last_txout_nonce),
)],
lock_time=0,
)
- def get_share(header, transactions):
- assert transactions[0] == gentx and [bitcoin_data.hash256(bitcoin_data.tx_type.pack(tx)) for tx in transactions[1:]] == desired_other_transaction_hashes
- min_header = dict(header);del min_header['merkle_root']
- 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] + desired_other_transaction_hashes, 0)
- pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header))
- return cls(net, None, dict(
- min_header=min_header, share_info=share_info, hash_link=hash_link,
+ 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),
- ), merkle_link=merkle_link, other_txs=transactions[1:] if pow_hash <= header['bits'].target else None)
+ last_txout_nonce=last_txout_nonce*2**32,
+ hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-8-4], 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, desired_other_transaction_hashes, get_share
+ return share_info, gentx, other_transaction_hashes, get_share
@classmethod
def get_ref_hash(cls, net, share_info, ref_merkle_link):
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 new_transaction_hashes time_seen'.split(' ')
+ __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 absheight abswork'.split(' ')
- def __init__(self, net, peer, common, merkle_link, other_txs):
+ def __init__(self, net, peer_addr, contents):
self.net = net
- self.peer = peer
- self.common = common
- self.min_header = common['min_header']
- self.share_info = common['share_info']
- self.hash_link = common['hash_link']
- self.merkle_link = merkle_link
- self.other_txs = other_txs
-
- if len(self.share_info['share_data']['coinbase']) > 100:
- raise ValueError('''coinbase too large! %i bytes''' % (len(self.share_info['share_data']['coinbase']),))
-
- if len(merkle_link['branch']) > 16:
- raise ValueError('merkle branch too long!')
+ self.peer_addr = peer_addr
+ self.contents = contents
- 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:
- raise ValueError('merkle_link and other_txs do not match')
+ 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.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']
+ self.absheight = self.share_info['absheight']
+ self.abswork = self.share_info['abswork']
+
+ 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, common['ref_merkle_link']) + pack.IntType(32).pack(0),
+ self.get_ref_hash(net, self.share_info, contents['ref_merkle_link']) + pack.IntType(64).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, merkle_link)
+ 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')
- if other_txs is not None and not self.pow_hash <= self.header['bits'].target:
- raise ValueError('other_txs provided when not a block solution')
- 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 = []
+ self.new_transaction_hashes = self.share_info['new_transaction_hashes']
# XXX eww
self.time_seen = time.time()
def __repr__(self):
- return '<Share %s>' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),)
-
- def as_share1a(self):
- return dict(type=4, contents=self.share1a_type.pack(dict(common=self.common, merkle_link=self.merkle_link)))
-
- def as_share1b(self):
- return dict(type=5, contents=self.share1b_type.pack(dict(common=self.common, other_txs=self.other_txs)))
+ return 'Share' + repr((self.net, self.peer_addr, self.contents))
def as_share(self):
- if not self.pow_hash <= self.header['bits'].target: # share1a
- return self.as_share1a()
- else:
- return self.as_share1b()
+ 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):
- 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
+ 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 as_block(self, tracker):
- if self.other_txs is None:
- raise ValueError('share does not contain all txs')
- return dict(header=self.header, txs=[self.check(tracker)] + self.other_txs)
+ 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 NewShare(object):
+class Share(object):
+ VERSION = 9
+ VOTING_VERSION = 11
+ SUCCESSOR = NewShare
+
+ absheight = abswork = 0
+
small_block_header_type = pack.ComposedType([
('version', pack.VarIntType()),
('previous_block', pack.PossiblyNoneType(0, pack.IntType(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()),
- ]))),
+ ('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()),
('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))),
('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]
+ 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, net):
+ 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'])
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))
+ 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),
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),
)],
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),
+ 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, transactions):
- min_header=dict(header);del min_header['merkle_root']
- return cls(net, None, dict(
+ 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),
- hash_link=prefix_to_hash_link(bitcoin_data.tx_type.pack(gentx)[:-32-4], cls.gentx_before_refhash),
+ 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
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(' ')
+ __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, contents):
+ def __init__(self, net, peer_addr, contents):
self.net = net
- self.peer = peer
+ self.peer_addr = peer_addr
self.contents = contents
self.min_header = contents['min_header']
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
+ 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(0),
+ 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.time_seen = time.time()
def __repr__(self):
- return 'Share' + repr((self.net, self.peer, self.contents))
+ return 'Share' + repr((self.net, self.peer_addr, self.contents))
def as_share(self):
- return dict(type=8, contents=self.share_type.pack(self.contents))
+ 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):
- 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']]
+ 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__))
- 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)
+ 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.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
+ 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):
- assert False
- return dict(header=self.header, txs=self.check(tracker))
+ 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):
return math.add_dicts(*math.flatten_linked_list(weights_list)), total_weight, total_donation_weight
class OkayTracker(forest.Tracker):
- def __init__(self, net, my_share_hashes, my_doa_share_hashes):
+ def __init__(self, net):
forest.Tracker.__init__(self, delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
min_work=lambda share: bitcoin_data.target_to_average_attempts(share.max_target),
)))
self.net = net
- self.verified = forest.Tracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
+ self.verified = forest.SubsetTracker(delta_type=forest.get_attributedelta_type(dict(forest.AttributeDelta.attrs,
work=lambda share: bitcoin_data.target_to_average_attempts(share.target),
- my_count=lambda share: 1 if share.hash in my_share_hashes else 0,
- my_doa_count=lambda share: 1 if share.hash in my_doa_share_hashes else 0,
- my_orphan_announce_count=lambda share: 1 if share.hash in my_share_hashes and share.share_data['stale_info'] == 'orphan' else 0,
- my_dead_announce_count=lambda share: 1 if share.hash in my_share_hashes and share.share_data['stale_info'] == 'doa' else 0,
)), subset_of=self)
self.get_cumulative_weights = WeightsSkipList(self)
self.verified.add(share)
return True
- def think(self, block_rel_height_func, previous_block, bits):
+ def think(self, block_rel_height_func, previous_block, bits, known_txs):
desired = set()
# O(len(self.heads))
else:
if last is not None:
desired.add((
- self.items[random.choice(list(self.reverse[last]))].peer,
+ self.items[random.choice(list(self.reverse[last]))].peer_addr,
last,
max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
min(x.target for x in self.get_chain(head, min(head_height, 5))),
break
if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None:
desired.add((
- self.items[random.choice(list(self.verified.reverse[last_hash]))].peer,
+ self.items[random.choice(list(self.verified.reverse[last_hash]))].peer_addr,
last_last_hash,
max(x.timestamp for x in self.get_chain(head, min(head_height, 5))),
min(x.target for x in self.get_chain(head, min(head_height, 5))),
# decide best verified head
decorated_heads = sorted(((
self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
- #self.items[h].peer is None,
- self.items[h].pow_hash <= self.items[h].header['bits'].target, # is block solution
- (self.items[h].header['previous_block'], self.items[h].header['bits']) == (previous_block, bits) or self.items[h].peer is None,
+ #self.items[h].peer_addr is None,
+ -self.items[h].should_punish_reason(previous_block, bits, self, known_txs)[0],
-self.items[h].time_seen,
), h) for h in self.verified.tails.get(best_tail, []))
if p2pool.DEBUG:
print ' ', format_hash(head_hash), format_hash(self.items[head_hash].previous_hash), score
best_head_score, best = decorated_heads[-1] if decorated_heads else (None, None)
- # eat away at heads
- if decorated_heads:
- for i in xrange(1000):
- to_remove = set()
- for share_hash, tail in self.heads.iteritems():
- if share_hash in [head_hash for score, head_hash in decorated_heads[-5:]]:
- #print 1
- continue
- if self.items[share_hash].time_seen > time.time() - 300:
- #print 2
- continue
- 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
- #print 3
- continue
- to_remove.add(share_hash)
- if not to_remove:
- break
- for share_hash in to_remove:
- if share_hash in self.verified.items:
- self.verified.remove(share_hash)
- self.remove(share_hash)
- #print "_________", to_remove
-
- # drop tails
- for i in xrange(1000):
- to_remove = set()
- for tail, heads in self.tails.iteritems():
- if min(self.get_height(head) for head in heads) < 2*self.net.CHAIN_LENGTH + 10:
- continue
- for aftertail in self.reverse.get(tail, set()):
- if len(self.reverse[self.items[aftertail].previous_hash]) > 1: # XXX
- print "raw"
- continue
- to_remove.add(aftertail)
- if not to_remove:
- break
- # if removed from this, it must be removed from verified
- #start = time.time()
- for aftertail in to_remove:
- if self.items[aftertail].previous_hash not in self.tails:
- print "erk", aftertail, self.items[aftertail].previous_hash
- continue
- if aftertail in self.verified.items:
- self.verified.remove(aftertail)
- self.remove(aftertail)
- #end = time.time()
- #print "removed! %i %f" % (len(to_remove), (end - start)/len(to_remove))
-
if best is not None:
best_share = self.items[best]
- 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:
- if p2pool.DEBUG:
- print 'Stale detected! %x < %x' % (best_share.header['previous_block'], previous_block)
+ punish, punish_reason = best_share.should_punish_reason(previous_block, bits, self, known_txs)
+ if punish > 0:
+ print 'Punishing share for %r! Jumping from %s to %s!' % (punish_reason, format_hash(best), format_hash(best_share.previous_hash))
best = best_share.previous_hash
timestamp_cutoff = min(int(time.time()), best_share.timestamp) - 3600
- 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
+ target_cutoff = int(2**256//(self.net.SHARE_PERIOD*best_tail_score[1] + 1) * 2 + .5) if best_tail_score[1] is not None else 2**256-1
else:
timestamp_cutoff = int(time.time()) - 24*60*60
target_cutoff = 2**256-1
if p2pool.DEBUG:
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))
- for peer, hash, ts, targ in desired:
- 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
+ for peer_addr, hash, ts, targ in desired:
+ print ' ', None if peer_addr is None else '%s:%i' % peer_addr, format_hash(hash), math.format_dt(time.time() - ts), bitcoin_data.target_to_difficulty(targ), ts >= timestamp_cutoff, targ <= target_cutoff
- return best, [(peer, hash) for peer, hash, ts, targ in desired if ts >= timestamp_cutoff]
+ return best, [(peer_addr, hash) for peer_addr, hash, ts, targ in desired if ts >= timestamp_cutoff], decorated_heads
def score(self, share_hash, block_rel_height_func):
# returns approximate lower bound on chain's hashrate in the last self.net.CHAIN_LENGTH*15//16*self.net.SHARE_PERIOD time
block_height = max(block_rel_height_func(share.header['previous_block']) for share in
self.verified.get_chain(end_point, self.net.CHAIN_LENGTH//16))
- return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work//((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
+ return self.net.CHAIN_LENGTH, self.verified.get_delta(share_hash, end_point).work/((0 - block_height + 1)*self.net.PARENT.BLOCK_PERIOD)
def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False, integer=False):
assert dist >= 2
res = []
desired_version_counts = get_desired_version_counts(tracker, best_share,
- min(60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
+ min(net.CHAIN_LENGTH, 60*60//net.SHARE_PERIOD, tracker.get_height(best_share)))
majority_desired_version = max(desired_version_counts, key=lambda k: desired_version_counts[k])
- if majority_desired_version > 5 and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
+ if majority_desired_version > (Share.SUCCESSOR if Share.SUCCESSOR is not None else Share).VOTING_VERSION and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
res.append('A MAJORITY OF SHARES CONTAIN A VOTE FOR AN UNSUPPORTED SHARE IMPLEMENTATION! (v%i with %i%% support)\n'
'An upgrade is likely necessary. Check http://p2pool.forre.st/ for more information.' % (
majority_desired_version, 100*desired_version_counts[majority_desired_version]/sum(desired_version_counts.itervalues())))
if bitcoind_warning is not None:
- res.append('(from bitcoind) %s' % (bitcoind_warning,))
+ if 'This is a pre-release test build' not in bitcoind_warning:
+ res.append('(from bitcoind) %s' % (bitcoind_warning,))
if time.time() > bitcoind_work_value['last_update'] + 60:
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']),))
verified_hashes.add(verified_hash)
elif type_id == 5:
raw_share = share_type.unpack(data_hex.decode('hex'))
- if raw_share['type'] in [0, 1, 2, 3, 6, 7]:
+ if raw_share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
continue
share = load_share(raw_share, self.net, None)
yield 'share', share
git://git.novaco.in / p2pool.git / blobdiff