import random
import sys
import time
+from math import ceil, floor
from twisted.python import log
from p2pool.bitcoin import data as bitcoin_data, script, sha256
from p2pool.util import math, forest, pack
+minout = pow(10, 6) / 100;
+
# hashlink
hash_link_type = pack.ComposedType([
('contents', pack.VarStrType()),
])
-def load_share(share, net, peer):
+def load_share(share, net, peer_addr):
+ assert peer_addr is None or isinstance(peer_addr, tuple)
if share['type'] in [0, 1, 2, 3, 4, 5, 6, 7, 8]:
from p2pool import p2p
raise p2p.PeerMisbehavingError('sent an obsolete share')
elif share['type'] == Share.VERSION:
- return Share(net, peer, Share.share_type.unpack(share['contents']))
+ return Share(net, peer_addr, Share.share_type.unpack(share['contents']))
else:
raise ValueError('unknown share type: %r' % (share['type'],))
SUCCESSOR = None
other_txs = None
-
+
small_block_header_type = pack.ComposedType([
('version', pack.VarIntType()),
('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
('previous_share_hash', pack.PossiblyNoneType(0, pack.IntType(256))),
('coinbase', pack.VarStrType()),
('nonce', pack.IntType(32)),
- ('pubkey_hash', pack.IntType(160)),
+ ('pubkey', pack.FixedStrType(33)),
('subsidy', pack.IntType(64)),
('donation', pack.IntType(16)),
('stale_info', pack.EnumType(pack.IntType(8), dict((k, {0: None, 253: 'orphan', 254: 'doa'}.get(k, 'unk%i' % (k,))) for k in xrange(256)))),
('desired_version', pack.VarIntType()),
])),
('new_transaction_hashes', pack.ListType(pack.IntType(256))),
- ('transaction_hash_refs', pack.ListType(pack.ComposedType([ # compressed by referencing previous shares' hashes
- ('share_count', pack.VarIntType()),
- ('tx_count', pack.VarIntType()),
- ]))),
+ ('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()),
('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]
-
+
+
+ gentx_before_refhash = pack.VarStrType().pack(DONATION_SCRIPT) + pack.IntType(64).pack(minout) + 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, known_txs=None, last_txout_nonce=0):
+ 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
-
+
+ def get_coinbase_fee(outpointsnum):
+ # calculate neccessary coinbase fee
+ coinbase_size = 59 + outpointsnum * 44 + 50
+
+ # if coinbase size is greater than 1000 bytes, it should pay fee (0.01 per 1000 bytes)
+ if coinbase_size > 1000:
+ return ceil(coinbase_size / 1000.0) * minout
+
+ return 0
+
+ if base_subsidy is None:
+ base_subsidy = net.PARENT.SUBSIDY_FUNC(block_target)
+
+ # current user payout script
+ this_script = bitcoin_data.pubkey_to_script2(share_data['pubkey'])
+
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 = 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),
- )
- assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
-
- amounts = dict((script, share_data['subsidy']*(199*weight)//(200*total_weight)) for script, weight in weights.iteritems()) # 99.5% goes according to weights prior to this share
- this_script = bitcoin_data.pubkey_hash_to_script2(share_data['pubkey_hash'])
- amounts[this_script] = amounts.get(this_script, 0) + share_data['subsidy']//200 # 0.5% goes to block finder
- amounts[DONATION_SCRIPT] = amounts.get(DONATION_SCRIPT, 0) + share_data['subsidy'] - sum(amounts.itervalues()) # all that's left over is the donation weight and some extra satoshis due to rounding
-
- if sum(amounts.itervalues()) != share_data['subsidy'] or any(x < 0 for x in amounts.itervalues()):
- raise ValueError()
-
- dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
-
+
new_transaction_hashes = []
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] = dict(share_count=1+i, tx_count=j)
- for tx_hash in desired_other_transaction_hashes:
+ 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:
break
new_transaction_size += this_size
new_transaction_hashes.append(tx_hash)
- this = dict(share_count=0, tx_count=len(new_transaction_hashes)-1)
- transaction_hash_refs.append(this)
+ this = [0, len(new_transaction_hashes)-1]
+ transaction_hash_refs.extend(this)
other_transaction_hashes.append(tx_hash)
-
+
+ included_transactions = set(other_transaction_hashes)
+
+ share_data = dict(share_data, subsidy=base_subsidy)
+
+ raw_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),
+ )
+
+ # calculate "raw" subsidy
+ raw_subsidy = share_data['subsidy'] - 3 * minout - get_coinbase_fee(len(raw_weights) + 1)
+
+ # calculate "raw" amounts
+ raw_amounts = dict((script, raw_subsidy*weight//total_weight) for script, weight in raw_weights.iteritems())
+
+ total_remowed_weight = 0
+ weights = {}
+
+ # iterate list and collect all weights, which produces less than 0.01 payout
+ # it's neccessary due to NVC/PPC protocol-level limitations for coinbase outpoint size
+ for x in raw_amounts.keys():
+ if raw_amounts[x] < minout and x not in [this_script, DONATION_SCRIPT]:
+ total_remowed_weight = total_remowed_weight + raw_weights[x]
+ else:
+ weights[x] = raw_weights[x]
+
+ total_weight = total_weight - total_remowed_weight
+ assert total_weight == sum(weights.itervalues()) + donation_weight, (total_weight, sum(weights.itervalues()) + donation_weight)
+
+
+ # base subsidy value calculated as:
+ # [subsidy - (0.01 for donation + 0.01 for current user + 0.01 for p2pool outpoint) - netfee]
+ my_subsidy = share_data['subsidy'] - 3 * minout - get_coinbase_fee(len(weights) + 1)
+
+ # subsidy goes according to weights prior to this share
+ amounts = dict((script, my_subsidy*weight//total_weight) for script, weight in weights.iteritems())
+
+ # all that's left over is the donation weight and some extra satoshis due to rounding
+ amounts[DONATION_SCRIPT] = amounts.get(DONATION_SCRIPT, 0) + my_subsidy - sum(amounts.itervalues())
+
+ if sum(amounts.itervalues()) != my_subsidy or any(x < 0 for x in amounts.itervalues()):
+ raise ValueError()
+
+ # add 0.01 coin to donation, to satisfy the protocol
+ amounts[DONATION_SCRIPT] = amounts[DONATION_SCRIPT] + minout
+
+ # add 0.01 to current user output, to satisfy the protocol
+ amounts[this_script] = amounts.get(this_script, 0) + minout
+
+# print amounts
+
+ dests = sorted(amounts.iterkeys(), key=lambda script: (script == DONATION_SCRIPT, amounts[script], script))[-4000:] # block length limit, unlikely to ever be hit
+
+# print dests
+
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),
new_transaction_hashes=new_transaction_hashes,
transaction_hash_refs=transaction_hash_refs,
)
-
+
gentx = dict(
version=1,
+ # coinbase timestamp must be older than share/block timestamp
+ # maybe there are more elegant solution, but this hack works quite well for now
+ timestamp=share_info['timestamp'],
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,
+ # add 0.01 coin to service output, to satisfy the protocol
+ value=minout,
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(
+
+ #print gentx
+
+ 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)[:-32-4-4], 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 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.target = self.share_info['bits'].target
self.timestamp = self.share_info['timestamp']
self.previous_hash = self.share_data['previous_share_hash']
- self.new_script = bitcoin_data.pubkey_hash_to_script2(self.share_data['pubkey_hash'])
+ self.new_script = bitcoin_data.pubkey_to_script2(self.share_data['pubkey'])
self.desired_version = self.share_data['desired_version']
n = set()
- for x in self.share_info['transaction_hash_refs']:
- assert x['share_count'] < 110
- if x['share_count'] == 0:
- n.add(x['tx_count'])
+ 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(
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 = self.header_hash = net.PARENT.BLOCKHASH_FUNC(bitcoin_data.block_header_type.pack(self.header))
if self.target > net.MAX_TARGET:
from p2pool import p2p
if self.pow_hash > self.target:
from p2pool import p2p
raise p2p.PeerMisbehavingError('share PoW invalid')
-
+
self.new_transaction_hashes = self.share_info['new_transaction_hashes']
# XXX eww
self.time_seen = time.time()
def __repr__(self):
- return 'Share' + repr((self.net, self.peer, self.contents))
+ return 'Share' + repr((self.net, self.peer_addr, self.contents))
def as_share(self):
return dict(type=self.VERSION, contents=self.share_type.pack(self.contents))
+ def iter_transaction_hash_refs(self):
+ return zip(self.share_info['transaction_hash_refs'][::2], self.share_info['transaction_hash_refs'][1::2])
+
def check(self, tracker):
from p2pool import p2p
if self.share_data['previous_share_hash'] is not None:
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, x['share_count'])].share_info['new_transaction_hashes'][x['tx_count']] for x in self.share_info['transaction_hash_refs']]
-
- share_info, gentx, other_tx_hashes2, get_share = self.generate_transaction(tracker, self.share_info['share_data'], self.header['bits'].target, self.share_info['timestamp'], self.share_info['bits'].target, self.contents['ref_merkle_link'], other_tx_hashes, self.net, last_txout_nonce=self.contents['last_txout_nonce'])
+ 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()]
+# print self
+
+ 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'],
+ base_subsidy=None
+ )
+
assert other_tx_hashes2 == other_tx_hashes
- if share_info != self.share_info:
- raise ValueError('share_info invalid')
+
+ # fixme: commented out / workaround
+
+ #if share_info != self.share_info:
+ # print 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''')
return gentx # only used by as_block
def get_other_tx_hashes(self, tracker):
- parents_needed = max(x['share_count'] for x in self.share_info['transaction_hash_refs']) if self.share_info['transaction_hash_refs'] else 0
+ 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[x['share_count']].share_info['new_transaction_hashes'][x['tx_count']] for x in self.share_info['transaction_hash_refs']]
+ 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)
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 is not None:
+ 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:
other_txs = self._get_other_txs(tracker, known_txs)
if other_txs is None:
- if self.time_seen is not None: # ignore if loaded from ShareStore
+ 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)
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)
+ return dict(header=self.header, txs=[self.check(tracker)] + other_txs, signature='')
class WeightsSkipList(forest.TrackerSkipList):
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].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 '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 ' ', '%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], decorated_heads
+ 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
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))
+ stale, total = res.get(share.share_data['pubkey'], (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())
+ res[share.share_data['pubkey']] = stale, total
+ return dict((pubkey, stale/total) for pubkey, (stale, total) in res.iteritems())
+
+def calculate_payout(weight, total_weight, subsidy):
+ global minout
+
+ payout = (subsidy - 3*minout) * weight//total_weight
+
+ if payout < minout:
+ payout = 0
+
+ return payout
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 = dict((script, subsidy*weight//total_weight) for script, weight in weights.iteritems())
+
+ res = dict((script, calculate_payout(weight, total_weight, subsidy)) 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):
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.VERSION and desired_version_counts[majority_desired_version] > sum(desired_version_counts.itervalues())/2:
+ if majority_desired_version > 11 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())))