import random
import time
-from twisted.internet import defer
from twisted.python import log
-from p2pool.bitcoin import data as bitcoin_data
-from p2pool.bitcoin import script
-from p2pool.util import memoize, expiring_dict, math, skiplist, deferral
import p2pool
+from p2pool import skiplists
+from p2pool.bitcoin import data as bitcoin_data, script
+from p2pool.util import memoize, expiring_dict, math
merkle_branch_type = bitcoin_data.ListType(bitcoin_data.ComposedType([
self.target = self.share_data['target']
self.nonce = self.share_data['nonce']
- if len(self.nonce) > 20:
+ if len(self.nonce) > 100:
raise ValueError('nonce too long!')
self.bitcoin_hash = bitcoin_data.block_header_type.hash256(header)
gentx = share_info_to_gentx(self.share_info, self.header['target'], tracker, net)
+ if len(gentx['tx_ins'][0]['script']) > 100:
+ raise ValueError('''coinbase too large!''')
+
if check_merkle_branch(gentx, self.merkle_branch) != self.header['merkle_root']:
raise ValueError('''gentx doesn't match header via merkle_branch''')
def __repr__(self):
return '<Share %s>' % (' '.join('%s=%r' % (k, v) for k, v in self.__dict__.iteritems()),)
-def get_pool_attempts_per_second(tracker, previous_share_hash, net):
- # XXX could be optimized to use nth_parent and cumulative_weights
- chain = list(itertools.islice(tracker.get_chain_to_root(previous_share_hash), net.TARGET_LOOKBEHIND))
- attempts = sum(bitcoin_data.target_to_average_attempts(share.target) for share in chain[:-1])
- time = chain[0].timestamp - chain[-1].timestamp
+def get_pool_attempts_per_second(tracker, previous_share_hash, net, dist=None):
+ if dist is None:
+ dist = net.TARGET_LOOKBEHIND
+ 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)
+ time = near.timestamp - far.timestamp
if time == 0:
time = 1
return attempts//time
attempts_to_block = bitcoin_data.target_to_average_attempts(block_target)
max_weight = net.SPREAD * attempts_to_block
- '''
- class fake_share(object):
- pass
- fake_share.new_script = new_script
- fake_share.target = target
-
- dest_weights = {}
- total_weight = 0
- for share in itertools.chain([fake_share], itertools.islice(tracker.get_chain_to_root(previous_share_hash), net.CHAIN_LENGTH)):
- weight = bitcoin_data.target_to_average_attempts(share.target)
- if weight > max_weight - total_weight:
- weight = max_weight - total_weight
-
- dest_weights[share.new_script] = dest_weights.get(share.new_script, 0) + weight
- total_weight += weight
-
- if total_weight == max_weight:
- break
- '''
-
this_weight = min(bitcoin_data.target_to_average_attempts(target), max_weight)
other_weights, other_weights_total = tracker.get_cumulative_weights(previous_share_hash, min(height, net.CHAIN_LENGTH), max(0, max_weight - this_weight))
dest_weights, total_weight = math.add_dicts([{new_script: this_weight}, other_weights]), this_weight + other_weights_total
- total_weight = sum(dest_weights.itervalues())
+ assert total_weight == sum(dest_weights.itervalues())
amounts = dict((script, subsidy*(396*weight)//(400*total_weight)) for (script, weight) in dest_weights.iteritems())
amounts[new_script] = amounts.get(new_script, 0) + subsidy*2//400
self.net = net
self.verified = bitcoin_data.Tracker()
- self.get_cumulative_weights = skiplist.WeightsSkipList(self)
+ self.get_cumulative_weights = skiplists.WeightsSkipList(self)
+
+ def add(self, share, known_verified=False):
+ bitcoin_data.Tracker.add(self, share)
+ if known_verified:
+ self.verified.add(share)
def attempt_verify(self, share, now):
if share.hash in self.verified.shares:
self.verified.add(share)
return True
- @defer.inlineCallbacks
def think(self, ht, previous_block, now):
desired = set()
for share in itertools.islice(self.get_chain_known(last_hash), get):
if not self.attempt_verify(share, now):
break
- if random.random() < .001:
- #print "YIELDING"
- yield deferral.sleep(.01)
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, last_last_hash))
# decide best tree
best_tail = max(self.verified.tails, key=lambda h: self.score(max(self.verified.tails[h], key=self.verified.get_height), ht)) if self.verified.tails else None
# decide best verified head
- scores = sorted(self.verified.tails.get(best_tail, []), key=lambda h: (self.verified.get_work(h), ht.get_min_height(self.verified.shares[h].previous_block), self.verified.shares[h].peer is None, -self.verified.shares[h].time_seen))
+ scores = sorted(self.verified.tails.get(best_tail, []), key=lambda h: (
+ self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
+ ht.get_min_height(self.verified.shares[h].previous_block),
+ self.verified.shares[h].peer is None,
+ -self.verified.shares[h].time_seen
+ ))
- #if __debug__:
- #print len(self.verified.tails.get(best_tail, []))
- #for a in scores:
- # print ' ', '%x'%a, self.score(a, ht)
+ if p2pool.DEBUG:
+ print len(self.verified.tails.get(best_tail, []))
+ for h in scores:
+ print ' ', format_hash(h), format_hash(self.verified.shares[h].previous_hash), (
+ self.verified.get_work(self.verified.get_nth_parent_hash(h, min(5, self.verified.get_height(h)))),
+ ht.get_min_height(self.verified.shares[h].previous_block),
+ self.verified.shares[h].peer is None,
+ -self.verified.shares[h].time_seen
+ )
- for share_hash in scores[:-5]:
- if self.shares[share_hash].time_seen > time.time() - 30:
- continue
- self.remove(share_hash)
- self.verified.remove(share_hash)
+ # eat away at heads
+ if scores:
+ while True:
+ to_remove = set()
+ for share_hash, tail in self.heads.iteritems():
+ if share_hash in scores[-5:]:
+ continue
+ if self.shares[share_hash].time_seen > time.time() - 30:
+ continue
+ if max(self.shares[before_tail_hash].time_seen for before_tail_hash in self.reverse_shares.get(tail)) > time.time() - 120:
+ continue
+ to_remove.add(share_hash)
+ for share_hash in to_remove:
+ self.remove(share_hash)
+ if share_hash in self.verified.shares:
+ self.verified.remove(share_hash)
+ if not to_remove:
+ break
- #for tail, heads in list(self.tails.iteritems()):
- # if min(self.get_height(head) for head in heads) > 2*net.CHAIN_LENGTH + 10:
- # self.remove(tail)
- # self.verified.remove(tail)
+ # drop tails
+ while True:
+ removed = False
+ # if removed from this, it must be removed from verified
+ for tail, heads in list(self.tails.iteritems()):
+ if min(self.get_height(head) for head in heads) < 2*self.net.CHAIN_LENGTH + 10:
+ continue
+ start = time.time()
+ for aftertail in list(self.reverse_shares.get(tail, set())):
+ self.remove(aftertail)
+ if aftertail in self.verified.shares:
+ self.verified.remove(aftertail)
+ removed = True
+ end = time.time()
+ print "removed! %x %f" % (tail, end - start)
+ if not removed:
+ break
best = scores[-1] if scores else None
best_share = self.verified.shares[best]
if ht.get_min_height(best_share.header['previous_block']) < ht.get_min_height(previous_block) and best_share.bitcoin_hash != previous_block and best_share.peer is not None:
if p2pool.DEBUG:
- print "Stale detected!"
+ print 'Stale detected!'
best = best_share.previous_hash
- defer.returnValue((best, desired))
+ return best, desired
@memoize.memoize_with_backing(expiring_dict.ExpiringDict(5, get_touches=False))
def score(self, share_hash, ht):
score2 = 0
attempts = 0
max_height = 0
- # XXX should only look past a certain share, not at recent ones
share2_hash = self.verified.get_nth_parent_hash(share_hash, min(self.net.CHAIN_LENGTH//2, head_height//2)) if last is not None else share_hash
- # XXX this must go in the opposite direction for max_height to make sense
for share in reversed(list(itertools.islice(self.verified.get_chain_known(share2_hash), self.net.CHAIN_LENGTH))):
max_height = max(max_height, ht.get_min_height(share.header['previous_block']))
attempts += bitcoin_data.target_to_average_attempts(share.target)
score2 = this_score
return min(head_height, self.net.CHAIN_LENGTH), score2
+def format_hash(x):
+ if x is None:
+ return 'xxxxxxxx'
+ return '%08x' % (x % 2**32)
class Mainnet(bitcoin_data.Mainnet):
SHARE_PERIOD = 5 # seconds
ADDRS_TABLE = 'addrs'
P2P_PORT = 9333
MAX_TARGET = 2**256//2**32 - 1
+ PERSIST = True
+ HEADERSTORE_FILENAME = 'headers.dat'
class Testnet(bitcoin_data.Testnet):
SHARE_PERIOD = 1 # seconds
ADDRS_TABLE = 'addrs_testnet'
P2P_PORT = 19333
MAX_TARGET = 2**256//2**20 - 1
+ PERSIST = False
+ HEADERSTORE_FILENAME = 'testnet_headers.dat'
git://git.novaco.in / p2pool.git / blobdiff