X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=p2pool%2Fdata.py;h=83c1cdc42f2a6fb8b280390f4a18563629330bc8;hb=76b297b6;hp=18ac522e3b3ba9dfb393d1c02ba07a14deb8865b;hpb=035ff356ebf3bc3d8b59a32eae253897fb7327a2;p=p2pool.git diff --git a/p2pool/data.py b/p2pool/data.py index 18ac522..83c1cdc 100644 --- a/p2pool/data.py +++ b/p2pool/data.py @@ -3,12 +3,12 @@ from __future__ import division import hashlib import os import random +import sys import time from twisted.python import log import p2pool -from p2pool import skiplists from p2pool.bitcoin import data as bitcoin_data, script, sha256 from p2pool.util import math, forest, pack @@ -34,464 +34,708 @@ def check_hash_link(hash_link, data, const_ending=''): # shares -share_data_type = pack.ComposedType([ - ('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))), - ('coinbase', pack.VarStrType()), - ('nonce', pack.VarStrType()), - ('new_script', pack.VarStrType()), - ('subsidy', pack.IntType(64)), - ('donation', pack.IntType(16)), - ('stale_info', pack.IntType(8)), # 0 nothing, 253 orphan, 254 doa -]) - -share_info_type = pack.ComposedType([ - ('share_data', share_data_type), - ('bits', bitcoin_data.FloatingIntegerType()), - ('timestamp', pack.IntType(32)), -]) - -share1a_type = pack.ComposedType([ - ('header', bitcoin_data.block_header_type), - ('share_info', share_info_type), - ('merkle_branch', bitcoin_data.merkle_branch_type), -]) - -share1b_type = pack.ComposedType([ - ('header', bitcoin_data.block_header_type), - ('share_info', share_info_type), - ('other_txs', pack.ListType(bitcoin_data.tx_type)), -]) - -# new - -small_block_header_type = pack.ComposedType([ - ('version', pack.VarIntType()), # XXX must be constrained to 32 bits - ('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))), - ('timestamp', pack.IntType(32)), - ('bits', bitcoin_data.FloatingIntegerType()), - ('nonce', pack.IntType(32)), -]) - -new_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.IntType(8)), # 0 nothing, 253 orphan, 254 doa -]) - -new_share_info_type = pack.ComposedType([ - ('share_data', new_share_data_type), - ('max_bits', bitcoin_data.FloatingIntegerType()), - ('bits', bitcoin_data.FloatingIntegerType()), - ('timestamp', pack.IntType(32)), -]) - -new_share1a_type = pack.ComposedType([ - ('min_header', small_block_header_type), - ('share_info', new_share_info_type), - ('hash_link', hash_link_type), - ('merkle_branch', bitcoin_data.merkle_branch_type), -]) - -new_share1b_type = pack.ComposedType([ - ('min_header', small_block_header_type), - ('share_info', new_share_info_type), - ('hash_link', hash_link_type), - ('other_txs', pack.ListType(bitcoin_data.tx_type)), -]) - - -# type: -# 0: share1a -# 1: share1b -# 2: new_share1a -# 3: new_share1b - share_type = pack.ComposedType([ ('type', pack.VarIntType()), ('contents', pack.VarStrType()), ]) -class Share(object): - __slots__ = 'header share_info merkle_branch other_txs timestamp share_data previous_hash target pow_hash header_hash hash time_seen peer net new_script max_target'.split(' ') +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'] == 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 NewShare(object): + VERSION = 13 + VOTING_VERSION = 13 + 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 from_share(cls, share, net, peer): - if share['type'] == 0: - res = cls(net, peer, **share1a_type.unpack(share['contents'])) - if not (res.pow_hash > res.header['bits'].target): - raise ValueError('invalid share type') - return res - elif share['type'] == 1: - share1b = share1b_type.unpack(share['contents']) - res = cls(net, peer, merkle_branch=bitcoin_data.calculate_merkle_branch([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in share1b['other_txs']], 0), **share1b) - if not (res.pow_hash <= res.header['bits'].target): - raise ValueError('invalid share type') - return res - elif share['type'] == 2: - res = NewShare(net, peer, **new_share1a_type.unpack(share['contents'])) - if not (res.pow_hash > res.header['bits'].target): - raise ValueError('invalid share type') - return res - elif share['type'] == 3: - share1b = new_share1b_type.unpack(share['contents']) - res = NewShare(net, peer, merkle_branch=bitcoin_data.calculate_merkle_branch([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in share1b['other_txs']], 0), **share1b) - if not (res.pow_hash <= res.header['bits'].target): - raise ValueError('invalid share type') - return res + 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: - raise ValueError('unknown share type: %r' % (share['type'],)) + 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.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, header, share_info, merkle_branch, other_txs=None): + 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.share_info = contents['share_info'] + self.hash_link = contents['hash_link'] + self.merkle_link = contents['merkle_link'] - if p2pool.DEBUG and other_txs is not None and bitcoin_data.calculate_merkle_branch([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in other_txs], 0) != merkle_branch: - raise ValueError('merkle_branch and other_txs do not match') + 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(merkle_branch) > 16: - raise ValueError('merkle_branch too long!') + if len(self.merkle_link['branch']) > 16: + raise ValueError('merkle branch too long!') - self.header = header - self.share_info = share_info - self.merkle_branch = merkle_branch + assert not self.hash_link['extra_data'], repr(self.hash_link['extra_data']) self.share_data = self.share_info['share_data'] - self.target = self.max_target = self.share_info['bits'].target + self.max_target = self.share_info['max_bits'].target + self.target = self.share_info['bits'].target self.timestamp = self.share_info['timestamp'] - if self.timestamp > net.SWITCH_TIME + 60*60: - raise ValueError('old share an hour after switch time') - - if len(self.share_data['new_script']) > 100: - raise ValueError('new_script too long!') - if script.get_sigop_count(self.share_data['new_script']) > 1: - raise ValueError('too many sigops!') - self.new_script = self.share_data['new_script'] - 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'] - if len(self.share_data['nonce']) > 100: - raise ValueError('nonce too long!') - - if len(self.share_data['coinbase']) > 100: - raise ValueError('''coinbase too large! %i bytes''' % (len(self.share_data['coinbase']),)) + 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.pow_hash = net.PARENT.POW_FUNC(bitcoin_data.block_header_type.pack(header)) - self.header_hash = bitcoin_data.hash256(bitcoin_data.block_header_type.pack(header)) + 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)) - self.hash = bitcoin_data.hash256(share1a_type.pack(self.as_share1a())) + if self.target > net.MAX_TARGET: + from p2pool import p2p + raise p2p.PeerMisbehavingError('share target invalid') if self.pow_hash > self.target: - print 'hash %x' % self.pow_hash - print 'targ %x' % self.target - raise ValueError('not enough work!') + 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.other_txs = other_txs + self.new_transaction_hashes = self.share_info['new_transaction_hashes'] # XXX eww self.time_seen = time.time() def __repr__(self): - return '' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),) + 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): - share_info, gentx = generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.net) + 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 difficulty invalid') + 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.check_merkle_branch(bitcoin_data.hash256(bitcoin_data.tx_type.pack(gentx)), 0, self.merkle_branch) != self.header['merkle_root']: - raise ValueError('''gentx doesn't match header via merkle_branch''') + 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_share(self): - if self.pow_hash > self.header['bits'].target: # share1a - return dict(type=0, contents=share1a_type.pack(self.as_share1a())) - elif self.pow_hash <= self.header['bits'].target: # share1b - if self.other_txs is None: - raise ValueError('share does not contain all txs') - return dict(type=1, contents=share1b_type.pack(dict(header=self.header, share_info=self.share_info, other_txs=self.other_txs))) - else: - raise AssertionError() + 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 as_share1a(self): - return dict(header=self.header, share_info=self.share_info, merkle_branch=self.merkle_branch) + 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 as_block(self, tracker): - if self.other_txs is None: - raise ValueError('share does not contain all txs') + 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) - share_info, gentx = generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.net) - assert share_info == self.share_info + if self.pow_hash <= self.header['bits'].target: + return -1, 'block solution' - return dict(header=self.header, txs=[gentx] + self.other_txs) - -def get_pool_attempts_per_second(tracker, previous_share_hash, dist, min_work=False): - assert dist >= 2 - near = tracker.shares[previous_share_hash] - far = tracker.shares[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)] - attempts = tracker.get_work(near.hash) - tracker.get_work(far.hash) if not min_work else tracker.get_delta(near.hash).min_work - tracker.get_delta(far.hash).min_work - time = near.timestamp - far.timestamp - if time <= 0: - time = 1 - return attempts//time - -def get_average_stale_prop(tracker, share_hash, lookbehind): - stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] in [253, 254]) - return stales/(lookbehind + stales) - -DONATION_SCRIPT = '4104ffd03de44a6e11b9917f3a29f9443283d9871c9d743ef30d5eddcd37094b64d1b3d8090496b53256786bf5c82932ec23c3b74d9f05a6f95a8b5529352656664bac'.decode('hex') + 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) -def generate_transaction(tracker, share_data, block_target, desired_timestamp, net): - previous_share_hash = share_data['previous_share_hash'] - new_script = share_data['new_script'] - subsidy = share_data['subsidy'] - donation = share_data['donation'] - assert 0 <= donation <= 65535 +class Share(object): + VERSION = 9 + VOTING_VERSION = 11 + SUCCESSOR = NewShare - if len(share_data['coinbase']) > 100: - raise ValueError('coinbase too long!') + 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)), + ]) - previous_share = tracker.shares[previous_share_hash] if previous_share_hash is not None else None + 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)), + ]) - chain_length = getattr(net, 'REAL_CHAIN_LENGTH_FUNC', lambda _: net.REAL_CHAIN_LENGTH)(previous_share.timestamp if previous_share is not None else None) + 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 + ])), + ]) - height, last = tracker.get_height_and_last(previous_share_hash) - assert height >= chain_length or last is None - if height < net.TARGET_LOOKBEHIND: - bits = bitcoin_data.FloatingInteger.from_target_upper_bound(net.MAX_TARGET) - else: - attempts_per_second = get_pool_attempts_per_second(tracker, previous_share_hash, net.TARGET_LOOKBEHIND) - pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 1 - pre_target2 = math.clip(pre_target, (previous_share.target*9//10, previous_share.target*11//10)) - pre_target3 = math.clip(pre_target2, (0, net.MAX_TARGET)) - bits = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3) - - attempts_to_block = bitcoin_data.target_to_average_attempts(block_target) - max_att = net.SPREAD * attempts_to_block - - this_att = min(bitcoin_data.target_to_average_attempts(bits.target), max_att) - other_weights, other_total_weight, other_donation_weight = tracker.get_cumulative_weights(previous_share_hash, min(height, chain_length), 65535*max(0, max_att - this_att)) - assert other_total_weight == sum(other_weights.itervalues()) + other_donation_weight, (other_total_weight, sum(other_weights.itervalues()) + other_donation_weight) - weights, total_weight, donation_weight = math.add_dicts({new_script: this_att*(65535-donation)}, other_weights), this_att*65535 + other_total_weight, this_att*donation + other_donation_weight - assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight) - - # 1 satoshi is always donated so that a list of p2pool generated blocks can be easily found by looking at the donation address - amounts = dict((script, (subsidy-1)*(199*weight)//(200*total_weight)) for (script, weight) in weights.iteritems()) - amounts[new_script] = amounts.get(new_script, 0) + (subsidy-1)//200 - amounts[DONATION_SCRIPT] = amounts.get(DONATION_SCRIPT, 0) + (subsidy-1)*(199*donation_weight)//(200*total_weight) - amounts[DONATION_SCRIPT] = amounts.get(DONATION_SCRIPT, 0) + subsidy - sum(amounts.itervalues()) # collect any extra satoshis :P - - if sum(amounts.itervalues()) != subsidy: - raise ValueError() - if any(x < 0 for x in amounts.itervalues()): - raise ValueError() - - dests = sorted(amounts.iterkeys(), key=lambda script: (amounts[script], script)) - dests = dests[-4000:] # block length limit, unlikely to ever be hit - - share_info = dict( - share_data=share_data, - bits=bits, - timestamp=math.clip(desired_timestamp, (previous_share.timestamp - 60, previous_share.timestamp + 60)) if previous_share is not None else desired_timestamp, - ) - - return share_info, dict( - version=1, - tx_ins=[dict( - previous_output=None, - sequence=None, - script=share_data['coinbase'].ljust(2, '\x00'), - )], - tx_outs=[dict(value=0, script='\x20' + pack.IntType(256).pack(bitcoin_data.hash256(share_info_type.pack(share_info))))] + [dict(value=amounts[script], script=script) for script in dests if amounts[script]], - lock_time=0, - ) - -ref_type = pack.ComposedType([ - ('identifier', pack.FixedStrType(64//8)), - ('share_info', new_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] - -def new_generate_transaction(tracker, share_data, block_target, desired_timestamp, desired_target, net): - previous_share = tracker.shares[share_data['previous_share_hash']] if share_data['previous_share_hash'] is not None else None + ref_type = pack.ComposedType([ + ('identifier', pack.FixedStrType(64//8)), + ('share_info', share_info_type), + ]) - 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) - pre_target = 2**256//(net.SHARE_PERIOD*attempts_per_second) - 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 - - share_info = dict( - share_data=share_data, - 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, - ) - - return share_info, dict( - version=1, - tx_ins=[dict( - previous_output=None, - sequence=None, - script=share_data['coinbase'].ljust(2, '\x00'), - )], - tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script]] + [dict( - value=0, - script='\x20' + pack.IntType(256).pack(bitcoin_data.hash256(ref_type.pack(dict( - identifier=net.IDENTIFIER, - share_info=share_info, - )))), - )], - lock_time=0, - ) - -def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net): - 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)) - res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems()) - res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues()) - return res - -class NewShare(object): - __slots__ = 'net min_header share_info hash_link merkle_branch other_txs hash share_data max_target target timestamp previous_hash new_script gentx_hash header pow_hash header_hash time_seen peer'.split(' ') + 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] - def __init__(self, net, peer, min_header, share_info, hash_link, merkle_branch, other_txs=None): - if len(share_info['share_data']['coinbase']) > 100: - raise ValueError('''coinbase too large! %i bytes''' % (len(self.share_data['coinbase']),)) + @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() - if len(merkle_branch) > 16: - raise ValueError('merkle_branch too long!') + dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit - if p2pool.DEBUG and other_txs is not None and bitcoin_data.calculate_merkle_branch([0] + [bitcoin_data.hash256(bitcoin_data.tx_type.pack(x)) for x in other_txs], 0) != merkle_branch: - raise ValueError('merkle_branch and other_txs do not match') + 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, + ) - assert not hash_link['extra_data'], repr(hash_link['extra_data']) + 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 = peer - self.min_header = min_header - self.share_info = share_info - self.hash_link = hash_link - self.merkle_branch = merkle_branch - self.other_txs = other_txs - - self.hash = bitcoin_data.hash256(share_type.pack(self.as_share(block_hint=other_txs is not None))) + 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']) - if self.timestamp < net.SWITCH_TIME - 60*60: - raise ValueError('new share an hour before switch time') + 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( - hash_link, - pack.IntType(256).pack(bitcoin_data.hash256(ref_type.pack(dict( - identifier=net.IDENTIFIER, - share_info=share_info, - )))) + pack.IntType(32).pack(0), - gentx_before_refhash, + 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_branch(self.gentx_hash, 0, merkle_branch) - self.header = dict(min_header, merkle_root=merkle_root) + 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.header_hash = bitcoin_data.hash256(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: - print 'hash %x' % self.pow_hash - print 'targ %x' % self.target - raise ValueError('not enough work!') + 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.share_info['new_transaction_hashes'] # XXX eww self.time_seen = time.time() def __repr__(self): - return '' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),) + 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): - share_info, gentx = new_generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.share_info['bits'].target, self.net) + 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 difficulty invalid') + 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_share(self, block_hint=None): - if block_hint is None: - block_hint = self.pow_hash <= self.header['bits'].target - if not block_hint: # share1a - return dict(type=2, contents=new_share1a_type.pack(dict(min_header=self.min_header, share_info=self.share_info, hash_link=self.hash_link, merkle_branch=self.merkle_branch))) - else: # share1b - if self.other_txs is None: - raise ValueError('share does not contain all txs') - return dict(type=3, contents=new_share1b_type.pack(dict(min_header=self.min_header, share_info=self.share_info, hash_link=self.hash_link, other_txs=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 as_block(self, tracker): - if self.other_txs is None: - raise ValueError('share does not contain all txs') + 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 - share_info, gentx = new_generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.share_info['bits'].target, self.net) - assert share_info == self.share_info + if not all(tx_hash in known_txs for tx_hash in other_tx_hashes): + return None # not all txs present - return dict(header=self.header, txs=[gentx] + self.other_txs) + 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 + + def get_delta(self, element): + from p2pool.bitcoin import data as bitcoin_data + share = self.tracker.items[element] + att = bitcoin_data.target_to_average_attempts(share.target) + return 1, {share.new_script: att*(65535-share.share_data['donation'])}, att*65535, att*share.share_data['donation'] + + def combine_deltas(self, (share_count1, weights1, total_weight1, total_donation_weight1), (share_count2, weights2, total_weight2, total_donation_weight2)): + return share_count1 + share_count2, math.add_dicts(weights1, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2 + + def initial_solution(self, start, (max_shares, desired_weight)): + assert desired_weight % 65535 == 0, divmod(desired_weight, 65535) + return 0, None, 0, 0 + + 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)): + if total_weight1 + total_weight2 > desired_weight and share_count2 == 1: + assert (desired_weight - total_weight1) % 65535 == 0 + script, = weights2.iterkeys() + new_weights = {script: (desired_weight - total_weight1)//65535*weights2[script]//(total_weight2//65535)} + 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) + return share_count1 + share_count2, (weights_list, weights2), total_weight1 + total_weight2, total_donation_weight1 + total_donation_weight2 + + def judge(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)): + if share_count > max_shares or total_weight > desired_weight: + return 1 + elif share_count == max_shares or total_weight == desired_weight: + return 0 + else: + return -1 + + def finalize(self, (share_count, weights_list, total_weight, total_donation_weight), (max_shares, desired_weight)): + assert share_count <= max_shares and total_weight <= desired_weight + assert share_count == max_shares or total_weight == desired_weight + 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'] == 253 else 0, - my_dead_announce_count=lambda share: 1 if share.hash in my_share_hashes and share.share_data['stale_info'] == 254 else 0, - ))) - self.verified.get_nth_parent_hash = self.get_nth_parent_hash # self is a superset of self.verified - - self.get_cumulative_weights = skiplists.WeightsSkipList(self) + )), subset_of=self) + self.get_cumulative_weights = WeightsSkipList(self) def attempt_verify(self, share): - if share.hash in self.verified.shares: + if share.hash in self.verified.items: return True height, last = self.get_height_and_last(share.hash) if height < self.net.CHAIN_LENGTH + 1 and last is not None: @@ -505,7 +749,7 @@ class OkayTracker(forest.Tracker): 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)) @@ -525,13 +769,13 @@ class OkayTracker(forest.Tracker): else: if last is not None: desired.add(( - self.shares[random.choice(list(self.reverse_shares[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))), )) for bad in bads: - assert bad not in self.verified.shares + assert bad not in self.verified.items assert bad in self.heads if p2pool.DEBUG: print "BAD", bad @@ -551,14 +795,14 @@ class OkayTracker(forest.Tracker): break if head_height < self.net.CHAIN_LENGTH and last_last_hash is not None: desired.add(( - self.verified.shares[random.choice(list(self.verified.reverse_shares[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 tree - decorated_tails = sorted((self.score(max(self.verified.tails[tail_hash], key=self.verified.get_height), block_rel_height_func), tail_hash) for tail_hash in self.verified.tails) # XXX using get_height here is quite possibly incorrect and vulnerable + 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) if p2pool.DEBUG: print len(decorated_tails), 'tails:' for score, tail_hash in decorated_tails: @@ -568,84 +812,35 @@ class OkayTracker(forest.Tracker): # 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.verified.shares[h].peer is None, - self.shares[h].pow_hash < self.shares[h].header['bits'].target, # is block solution - (self.verified.shares[h].header['previous_block'], self.verified.shares[h].header['bits']) == (previous_block, bits) or self.verified.shares[h].peer is None, - -self.verified.shares[h].time_seen, + #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 len(decorated_heads), 'heads. Top 10:' for score, head_hash in decorated_heads[-10:]: - print ' ', format_hash(head_hash), format_hash(self.verified.shares[head_hash].previous_hash), score + 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.shares[share_hash].time_seen > time.time() - 300: - #print 2 - continue - if share_hash not in self.verified.shares and max(self.shares[after_tail_hash].time_seen for after_tail_hash in self.reverse_shares.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: - self.remove(share_hash) - if share_hash in self.verified.shares: - self.verified.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_shares.get(tail, set()): - if len(self.reverse_shares[self.shares[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.shares[aftertail].previous_hash not in self.tails: - print "erk", aftertail, self.shares[aftertail].previous_hash - continue - self.remove(aftertail) - if aftertail in self.verified.shares: - self.verified.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.verified.shares[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) + best_share = self.items[best] + 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 and targ <= target_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 @@ -659,7 +854,78 @@ class OkayTracker(forest.Tracker): 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_work(share_hash) - self.verified.get_work(end_point))//((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 + near = tracker.items[previous_share_hash] + far = tracker.items[tracker.get_nth_parent_hash(previous_share_hash, dist - 1)] + attempts = tracker.get_delta(near.hash, far.hash).work if not min_work else tracker.get_delta(near.hash, far.hash).min_work + time = near.timestamp - far.timestamp + if time <= 0: + time = 1 + if integer: + return attempts//time + return attempts/time + +def get_average_stale_prop(tracker, share_hash, lookbehind): + stales = sum(1 for share in tracker.get_chain(share_hash, lookbehind) if share.share_data['stale_info'] is not None) + return stales/(lookbehind + stales) + +def get_stale_counts(tracker, share_hash, lookbehind, rates=False): + res = {} + for share in tracker.get_chain(share_hash, lookbehind - 1): + res['good'] = res.get('good', 0) + bitcoin_data.target_to_average_attempts(share.target) + s = share.share_data['stale_info'] + if s is not None: + res[s] = res.get(s, 0) + bitcoin_data.target_to_average_attempts(share.target) + if rates: + dt = tracker.items[share_hash].timestamp - tracker.items[tracker.get_nth_parent_hash(share_hash, lookbehind - 1)].timestamp + res = dict((k, v/dt) for k, v in res.iteritems()) + return res + +def get_user_stale_props(tracker, share_hash, lookbehind): + res = {} + for share in tracker.get_chain(share_hash, lookbehind - 1): + stale, total = res.get(share.share_data['pubkey_hash'], (0, 0)) + total += 1 + if share.share_data['stale_info'] is not None: + stale += 1 + total += 1 + res[share.share_data['pubkey_hash']] = stale, total + return dict((pubkey_hash, stale/total) for pubkey_hash, (stale, total) in res.iteritems()) + +def get_expected_payouts(tracker, best_share_hash, block_target, subsidy, net): + 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)) + res = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems()) + res[DONATION_SCRIPT] = res.get(DONATION_SCRIPT, 0) + subsidy - sum(res.itervalues()) + return res + +def get_desired_version_counts(tracker, best_share_hash, dist): + res = {} + for share in tracker.get_chain(best_share_hash, dist): + res[share.desired_version] = res.get(share.desired_version, 0) + bitcoin_data.target_to_average_attempts(share.target) + return res + +def get_warnings(tracker, best_share, net, bitcoind_warning, bitcoind_work_value): + res = [] + + desired_version_counts = get_desired_version_counts(tracker, 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 > (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: + 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']),)) + + return res def format_hash(x): if x is None: @@ -696,13 +962,16 @@ class ShareStore(object): yield 'verified_hash', verified_hash verified_hashes.add(verified_hash) elif type_id == 5: - share = Share.from_share(share_type.unpack(data_hex.decode('hex')), self.net, None) + raw_share = share_type.unpack(data_hex.decode('hex')) + 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 share_hashes.add(share.hash) else: raise NotImplementedError("share type %i" % (type_id,)) except Exception: - log.err(None, "Error while reading saved shares, continuing where left off:") + log.err(None, "HARMLESS error while reading saved shares, continuing where left off:") self.known = known self.known_desired = dict((k, (set(a), set(b))) for k, (a, b) in known.iteritems())