('other_txs', bitcoin_data.ListType(bitcoin_data.tx_type)),
])
+new_share_data_type = bitcoin_data.ComposedType([
+ ('previous_share_hash', bitcoin_data.PossiblyNoneType(0, bitcoin_data.HashType())),
+ ('coinbase', bitcoin_data.VarStrType()),
+ ('nonce', bitcoin_data.VarStrType()),
+ ('new_script', bitcoin_data.VarStrType()),
+ ('subsidy', bitcoin_data.StructType('<Q')),
+ ('donation', bitcoin_data.StructType('<H')),
+])
+
+new_share_info_type = bitcoin_data.ComposedType([
+ ('new_share_data', new_share_data_type),
+ ('target', bitcoin_data.FloatingIntegerType()),
+])
+
+new_share1a_type = bitcoin_data.ComposedType([
+ ('header', bitcoin_data.block_header_type),
+ ('share_info', new_share_info_type),
+ ('merkle_branch', bitcoin_data.merkle_branch_type),
+])
+
+new_share1b_type = bitcoin_data.ComposedType([
+ ('header', bitcoin_data.block_header_type),
+ ('share_info', new_share_info_type),
+ ('other_txs', bitcoin_data.ListType(bitcoin_data.tx_type)),
+])
+
def calculate_merkle_branch(txs, index):
hash_list = [(bitcoin_data.tx_type.hash256(tx), i == index, []) for i, tx in enumerate(txs)]
hash_ = bitcoin_data.merkle_record_type.hash256(dict(left=hash_, right=step['hash']))
return hash_
-def gentx_to_share_info(gentx):
- return dict(
- share_data=coinbase_type.unpack(gentx['tx_ins'][0]['script'])['share_data'],
- subsidy=sum(tx_out['value'] for tx_out in gentx['tx_outs']),
- new_script=gentx['tx_outs'][-1]['script'],
- )
-
def share_info_to_gentx(share_info, block_target, tracker, net):
return generate_transaction(
tracker=tracker,
nonce=share_info['share_data']['nonce'],
block_target=block_target,
net=net,
- )
+ )[1]
class Share(object):
+ donation = 0
+
@classmethod
def from_block(cls, block, net):
return cls(net, block['header'], gentx_to_share_info(block['txs'][0]), other_txs=block['txs'][1:])
return dict(header=self.header, share_info=self.share_info, merkle_branch=self.merkle_branch)
def as_share1b(self):
+ if self.other_txs is None:
+ raise ValueError('share does not contain all txs')
+
return dict(header=self.header, share_info=self.share_info, other_txs=self.other_txs)
def check(self, tracker, now, net):
def __repr__(self):
return '<Share %s>' % (' '.join('%s=%r' % (k, getattr(self, k)) for k in self.__slots__),)
+class NewShare(Share):
+ def __init__(self, net, header, new_share_info, merkle_branch=None, other_txs=None):
+ if merkle_branch is None and other_txs is None:
+ raise ValueError('need either merkle_branch or other_txs')
+ if other_txs is not None:
+ new_merkle_branch = bitcoin_data.calculate_merkle_branch([dict(version=0, tx_ins=[], tx_outs=[], lock_time=0)] + other_txs, 0)
+ if merkle_branch is not None:
+ if merke_branch != new_merkle_branch:
+ raise ValueError('invalid merkle_branch and other_txs')
+ merkle_branch = new_merkle_branch
+
+ if len(merkle_branch) > 16:
+ raise ValueError('merkle_branch too long!')
+
+ self.header = header
+ self.previous_block = header['previous_block']
+ self.share_info = new_share_info
+ self.merkle_branch = merkle_branch
+ self.other_txs = other_txs
+
+ self.timestamp = self.header['timestamp']
+
+ self.share_data = self.share_info['new_share_data']
+ self.new_script = self.share_data['new_script']
+ self.subsidy = self.share_data['subsidy']
+
+ if len(self.new_script) > 100:
+ raise ValueError('new_script too long!')
+
+ self.previous_hash = self.previous_share_hash = self.share_data['previous_share_hash']
+ self.target = self.share_info['target']
+ self.nonce = self.share_data['nonce']
+
+ if len(self.nonce) > 100:
+ raise ValueError('nonce too long!')
+
+ if getattr(net, 'BITCOIN_POW_SCRYPT', False):
+ self.bitcoin_hash = bitcoin_data.block_header_type.scrypt(header)
+ else:
+ self.bitcoin_hash = bitcoin_data.block_header_type.hash256(header)
+
+ self.hash = new_share1a_type.hash256(self.as_share1a())
+
+ if self.bitcoin_hash > self.target:
+ print 'hash %x' % self.bitcoin_hash
+ print 'targ %x' % self.target
+ raise ValueError('not enough work!')
+
+ if script.get_sigop_count(self.new_script) > 1:
+ raise ValueError('too many sigops!')
+
+ # XXX eww
+ self.time_seen = time.time()
+ self.shared = False
+ self.stored = False
+ self.peer = None
+
+ def check(self, tracker, now, net):
+ import time
+ if self.previous_share_hash is not None:
+ if self.header['timestamp'] <= math.median((s.timestamp for s in itertools.islice(tracker.get_chain_to_root(self.previous_share_hash), 11)), use_float=False):
+ raise ValueError('share from too far in the past!')
+
+ if self.header['timestamp'] > now + 2*60*60:
+ raise ValueError('share from too far in the future!')
+
+ new_share_info, gentx = new_generate_transaction(tracker, self.share_info['new_share_data'], self.header['target'], net)
+ if new_share_info != self.share_info:
+ raise ValueError()
+
+ if len(gentx['tx_ins'][0]['script']) > 100:
+ raise ValueError('''coinbase too large! %i bytes''' % (len(gentx['tx_ins'][0]['script']),))
+
+ if bitcoin_data.check_merkle_branch(gentx, 0, self.merkle_branch) != self.header['merkle_root']:
+ raise ValueError('''gentx doesn't match header via merkle_branch''')
+
+ if self.other_txs is not None:
+ if bitcoin_data.merkle_hash([gentx] + self.other_txs) != self.header['merkle_root']:
+ raise ValueError('''gentx doesn't match header via other_txs''')
+
+ if len(bitcoin_data.block_type.pack(dict(header=self.header, txs=[gentx] + self.other_txs))) > 1000000 - 1000:
+ raise ValueError('''block size too large''')
+
def get_pool_attempts_per_second(tracker, previous_share_hash, net, dist=None):
if dist is None:
dist = net.TARGET_LOOKBEHIND
target = bitcoin_data.FloatingInteger.from_target_upper_bound(pre_target3)
attempts_to_block = bitcoin_data.target_to_average_attempts(block_target)
- max_weight = net.SPREAD * attempts_to_block
+ max_weight = 65535 * net.SPREAD * attempts_to_block
+
+ this_weight = 65535 * min(bitcoin_data.target_to_average_attempts(target), max_weight)
+ other_weights, other_weights_total, other_donation_weight_total = tracker.get_cumulative_weights(previous_share_hash, min(height, net.CHAIN_LENGTH), max(0, max_weight - this_weight))
+ dest_weights, total_weight, donation_weight_total = math.add_dicts([{new_script: this_weight}, other_weights]), this_weight + other_weights_total, other_donation_weight_total
+ assert total_weight == sum(dest_weights.itervalues()) + donation_weight_total
- 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
- assert total_weight == sum(dest_weights.itervalues())
-
if net.SCRIPT:
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
amounts = dict((script, subsidy*(398*weight)//(400*total_weight)) for (script, weight) in dest_weights.iteritems())
amounts[new_script] = amounts.get(new_script, 0) + subsidy*2//400
amounts[new_script] = amounts.get(new_script, 0) + subsidy - sum(amounts.itervalues()) # collect any extra
-
+
if sum(amounts.itervalues()) != subsidy:
raise ValueError()
if any(x < 0 for x in amounts.itervalues()):
dests = sorted(pre_dests, key=lambda script: (script == new_script, script))
assert dests[-1] == new_script
- return dict(
+ share_data = dict(
+ previous_share_hash=previous_share_hash,
+ nonce=nonce,
+ target=target,
+ )
+
+ share_info = dict(
+ share_data=share_data,
+ new_script=new_script,
+ subsidy=subsidy,
+ )
+
+ return share_info, dict(
version=1,
tx_ins=[dict(
previous_output=None,
sequence=None,
script=coinbase_type.pack(dict(
identifier=net.IDENTIFIER,
- share_data=dict(
- previous_share_hash=previous_share_hash,
- nonce=nonce,
- target=target,
- ),
+ share_data=share_data,
)),
)],
tx_outs=[dict(value=amounts[script], script=script) for script in dests if amounts[script]],
lock_time=0,
)
+def new_generate_transaction(tracker, new_share_data, block_target, net):
+ previous_share_hash = new_share_data['previous_share_hash']
+ new_script = new_share_data['new_script']
+ subsidy = new_share_data['subsidy']
+ donation = new_share_data['donation']
+ assert 0 <= donation <= 65535
+
+ height, last = tracker.get_height_and_last(previous_share_hash)
+ assert height >= net.CHAIN_LENGTH or last is None
+ if height < net.TARGET_LOOKBEHIND:
+ target = bitcoin_data.FloatingInteger.from_target_upper_bound(net.MAX_TARGET)
+ else:
+ attempts_per_second = get_pool_attempts_per_second(tracker, previous_share_hash, net)
+ previous_share = tracker.shares[previous_share_hash] if previous_share_hash is not None else None
+ 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))
+ target = 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(target), max_att)
+ other_weights, other_total_weight, other_donation_weight = tracker.get_cumulative_weights(previous_share_hash, min(height, net.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)
+
+ amounts = dict((script, subsidy*(199*weight)//(200*total_weight)) for (script, weight) in weights.iteritems())
+ amounts[new_script] = amounts.get(new_script, 0) + subsidy//200
+ amounts[net.SCRIPT] = amounts.get(net.SCRIPT, 0) + subsidy*(199*donation_weight)//(200*total_weight)
+ amounts[net.SCRIPT] = amounts.get(net.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()):
+ print amounts
+ import code
+ d = globals()
+ d.update(locals())
+ code.interact(local=d)
+ raise ValueError()
+
+ pre_dests = sorted(amounts.iterkeys(), key=lambda script: (amounts[script], script))
+ pre_dests = pre_dests[-4000:] # block length limit, unlikely to ever be hit
+
+ dests = sorted(pre_dests, key=lambda script: (script == new_script, script))
+ assert dests[-1] == new_script
+
+ new_share_info = dict(
+ new_share_data=new_share_data,
+ target=target,
+ )
+
+ return new_share_info, dict(
+ version=1,
+ tx_ins=[dict(
+ previous_output=None,
+ sequence=None,
+ script=new_share_data['coinbase'],
+ )],
+ tx_outs=[dict(value=0, script=bitcoin_data.HashType().pack(new_share_info_type.hash256(new_share_info)))] + [dict(value=amounts[script], script=script) for script in dests if amounts[script]],
+ lock_time=0,
+ )
class OkayTracker(bitcoin_data.Tracker):
verified_hash = int(data_hex, 16)
yield 'verified_hash', verified_hash
verified_hashes.add(verified_hash)
+ elif type_id == 3:
+ share = NewShare.from_share1a(new_share1a_type.unpack(data_hex.decode('hex')), self.net)
+ yield 'share', share
+ share_hashes.add(share.hash)
+ elif type_id == 4:
+ share = NewShare.from_share1b(new_share1b_type.unpack(data_hex.decode('hex')), self.net)
+ yield 'share', share
+ share_hashes.add(share.hash)
else:
raise NotImplementedError("share type %i" % (type_id,))
except Exception:
return filename
def add_share(self, share):
- if share.bitcoin_hash <= share.header['target']:
+ if isinstance(share, NewShare) and share.bitcoin_hash <= share.header['target']:
+ type_id, data = 4, new_share1b_type.pack(share.as_share1b())
+ elif isinstance(share, NewShare):
+ type_id, data = 3, new_share1a_type.pack(share.as_share1a())
+ elif share.bitcoin_hash <= share.header['target']:
type_id, data = 1, share1b_type.pack(share.as_share1b())
else:
type_id, data = 0, share1a_type.pack(share.as_share1a())
NAME = 'bitcoin'
P2P_PORT = 9333
MAX_TARGET = 2**256//2**32 - 1
- PERSIST = True
+ PERSIST = False
WORKER_PORT = 9332
class BitcoinTestnet(networks.BitcoinTestnet):
git://git.novaco.in / p2pool.git / blobdiff