def getwork(dashd, net, use_getblocktemplate=False):
def go():
if use_getblocktemplate:
return dashd.rpc_getblocktemplate(dict(mode='template'))
else:
return dashd.rpc_getmemorypool()
try:
start = time.time()
work = yield go()
end = time.time()
except jsonrpc.Error_for_code(-32601): # Method not found
use_getblocktemplate = not use_getblocktemplate
try:
start = time.time()
work = yield go()
end = time.time()
except jsonrpc.Error_for_code(-32601): # Method not found
print >> sys.stderr, 'Error: Dash version too old! Upgrade to v0.11.0.11 or newer!'
raise deferral.RetrySilentlyException()
packed_transactions = [
(x['data'] if isinstance(x, dict) else x).decode('hex')
for x in work['transactions']
]
packed_votes = [(x['data'] if isinstance(x, dict) else x).decode('hex')
for x in work['votes']]
if 'height' not in work:
work['height'] = (yield dashd.rpc_getblock(
work['previousblockhash']))['height'] + 1
elif p2pool.DEBUG:
assert work['height'] == (yield dashd.rpc_getblock(
work['previousblockhash']))['height'] + 1
defer.returnValue(
dict(
version=work['version'],
previous_block=int(work['previousblockhash'], 16),
transactions=map(dash_data.tx_type.unpack, packed_transactions),
transaction_hashes=map(dash_data.hash256, packed_transactions),
transaction_fees=[
x.get('fee', None) if isinstance(x, dict) else None
for x in work['transactions']
],
subsidy=work['coinbasevalue'],
time=work['time'] if 'time' in work else work['curtime'],
bits=dash_data.FloatingIntegerType().unpack(
work['bits'].decode('hex')[::-1]) if isinstance(
work['bits'],
(str,
unicode)) else dash_data.FloatingInteger(work['bits']),
coinbaseflags=work['coinbaseflags'].decode('hex')
if 'coinbaseflags' in work else ''.join(
x.decode('hex') for x in work['coinbaseaux'].itervalues())
if 'coinbaseaux' in work else '',
height=work['height'],
last_update=time.time(),
use_getblocktemplate=use_getblocktemplate,
latency=end - start,
votes=map(dash_data.vote_type.unpack, packed_votes),
payee=dash_data.address_to_pubkey_hash(work['payee'], net.PARENT)
if (work['payee'] != '') else None,
masternode_payments=work['masternode_payments'],
payee_amount=work['payee_amount'] if
(work['payee_amount'] != '') else work['coinbasevalue'] / 5,
))
def getwork(dashd, net, use_getblocktemplate=True):
def go():
if use_getblocktemplate:
return dashd.rpc_getblocktemplate(dict(mode='template'))
else:
return dashd.rpc_getmemorypool()
try:
start = time.time()
work = yield go()
end = time.time()
except jsonrpc.Error_for_code(-32601): # Method not found
use_getblocktemplate = not use_getblocktemplate
try:
start = time.time()
work = yield go()
end = time.time()
except jsonrpc.Error_for_code(-32601): # Method not found
print >> sys.stderr, 'Error: dash version too old! Upgrade to v0.11.2.17 or newer!'
raise deferral.RetrySilentlyException()
if work['transactions']:
packed_transactions = [
(x['data'] if isinstance(x, dict) else x).decode('hex')
for x in work['transactions']
]
else:
packed_transactions = []
if 'height' not in work:
work['height'] = (yield dashd.rpc_getblock(
work['previousblockhash']))['height'] + 1
elif p2pool.DEBUG:
assert work['height'] == (yield dashd.rpc_getblock(
work['previousblockhash']))['height'] + 1
# Dash Payments
packed_payments = []
payment_amount = 0
payment_objects = []
if 'masternode' in work:
if isinstance(work['masternode'], list):
payment_objects += work['masternode']
else:
payment_objects += [work['masternode']]
if 'superblock' in work:
payment_objects += work['superblock']
for obj in payment_objects:
g = {}
if 'payee' in obj:
g['payee'] = str(obj['payee'])
g['amount'] = obj['amount']
if g['amount'] > 0:
payment_amount += g['amount']
packed_payments.append(g)
coinbase_payload = None
if 'coinbase_payload' in work and len(work['coinbase_payload']) != 0:
coinbase_payload = work['coinbase_payload'].decode('hex')
defer.returnValue(
dict(
version=work['version'],
previous_block=int(work['previousblockhash'], 16),
transactions=map(dash_data.tx_type.unpack, packed_transactions),
transaction_hashes=map(dash_data.hash256, packed_transactions),
transaction_fees=[
x.get('fee', None) if isinstance(x, dict) else None
for x in work['transactions']
],
subsidy=work['coinbasevalue'],
time=work['time'] if 'time' in work else work['curtime'],
bits=dash_data.FloatingIntegerType().unpack(
work['bits'].decode('hex')[::-1]) if isinstance(
work['bits'],
(str,
unicode)) else dash_data.FloatingInteger(work['bits']),
coinbaseflags=work['coinbaseflags'].decode('hex')
if 'coinbaseflags' in work else ''.join(
x.decode('hex') for x in work['coinbaseaux'].itervalues())
if 'coinbaseaux' in work else '',
height=work['height'],
last_update=time.time(),
use_getblocktemplate=use_getblocktemplate,
latency=end - start,
payment_amount=payment_amount,
packed_payments=packed_payments,
coinbase_payload=coinbase_payload,
))
class Share(object):
VERSION = 15
VOTING_VERSION = 15
SUCCESSOR = None
small_block_header_type = pack.ComposedType([
('version', pack.VarIntType()),
('previous_block', pack.PossiblyNoneType(0, pack.IntType(256))),
('timestamp', pack.IntType(32)),
('bits', dash_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()),
('payment_amount', pack.IntType(64)),
('packed_payments',
pack.ListType(
pack.ComposedType([
('payee', pack.PossiblyNoneType('', pack.VarStrType())),
('amount', pack.PossiblyNoneType(0, pack.IntType(64))),
]))),
])),
('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', dash_data.FloatingIntegerType()),
('bits', dash_data.FloatingIntegerType()),
('timestamp', pack.IntType(32)),
('absheight', pack.IntType(32)),
('abswork', pack.IntType(128)),
])
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(64)),
('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(
'\x6a\x28' + pack.IntType(256).pack(0) +
pack.IntType(64).pack(0))[:3]
@classmethod
def generate_transaction(cls,
tracker,
share_data,
block_target,
desired_timestamp,
desired_target,
ref_merkle_link,
desired_other_transaction_hashes_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 = dash_data.FloatingInteger.from_target_upper_bound(
pre_target3)
bits = dash_data.FloatingInteger.from_target_upper_bound(
math.clip(desired_target, (pre_target3 // 30, 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 = dash_data.tx_type.packed_size(
known_txs[tx_hash])
#if new_transaction_size + this_size > 50000: # only allow 50 kB of new txns/share
# break
new_transaction_size += this_size
new_transaction_hashes.append(tx_hash)
this = [0, len(new_transaction_hashes) - 1]
transaction_hash_refs.extend(this)
other_transaction_hashes.append(tx_hash)
included_transactions = set(other_transaction_hashes)
removed_fees = [
fee for tx_hash, fee in desired_other_transaction_hashes_and_fees
if tx_hash not in included_transactions
]
definite_fees = sum(
0 if fee is None else fee
for tx_hash, fee in desired_other_transaction_hashes_and_fees
if tx_hash in included_transactions)
if None not in removed_fees:
share_data = dict(share_data,
subsidy=share_data['subsidy'] -
sum(removed_fees))
else:
assert base_subsidy is not None
share_data = dict(share_data, subsidy=base_subsidy + definite_fees)
weights, total_weight, donation_weight = tracker.get_cumulative_weights(
previous_share.share_data['previous_share_hash']
if previous_share is not None else None,
max(0,
min(height, net.REAL_CHAIN_LENGTH) - 1),
65535 * net.SPREAD *
dash_data.target_to_average_attempts(block_target),
)
assert total_weight == sum(weights.itervalues()) + donation_weight, (
total_weight, sum(weights.itervalues()) + donation_weight)
worker_payout = share_data['subsidy']
payments = share_data['packed_payments']
payments_tx = []
if payments is not None:
for obj in payments:
pm_script = dash_data.address_to_script2(
obj['payee'], net.PARENT)
pm_payout = obj['amount']
if pm_payout > 0:
payments_tx += [dict(value=pm_payout, script=pm_script)]
worker_payout -= pm_payout
amounts = dict(
(script, worker_payout * (49 * weight) // (50 * total_weight))
for script, weight in weights.iteritems(
)) # 98% goes according to weights prior to this share
this_script = dash_data.pubkey_hash_to_script2(
share_data['pubkey_hash'])
amounts[this_script] = amounts.get(
this_script, 0) + worker_payout // 50 # 2% goes to block finder
amounts[DONATION_SCRIPT] = amounts.get(
DONATION_SCRIPT, 0
) + worker_payout - sum(
amounts.itervalues()
) # all that's left over is the donation weight and some extra satoshis due to rounding
if sum(amounts.itervalues()) != worker_payout or any(
x < 0 for x in amounts.itervalues()):
raise ValueError()
worker_scripts = sorted(
[k for k in amounts.iterkeys() if k != DONATION_SCRIPT])
worker_tx = [
dict(value=amounts[script], script=script)
for script in worker_scripts if amounts[script]
]
donation_tx = [
dict(value=amounts[DONATION_SCRIPT], script=DONATION_SCRIPT)
]
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,
absheight=((previous_share.absheight
if previous_share is not None else 0) + 1) % 2**32,
abswork=(
(previous_share.abswork if previous_share is not None else 0) +
dash_data.target_to_average_attempts(bits.target)) % 2**128,
)
gentx = dict(
version=1,
tx_ins=[
dict(
previous_output=None,
sequence=None,
script=share_data['coinbase'],
)
],
tx_outs=worker_tx + payments_tx + donation_tx + [
dict(
value=0,
script='\x6a\x28' +
cls.get_ref_hash(net, share_info, ref_merkle_link) +
pack.IntType(64).pack(last_txout_nonce),
)
],
lock_time=0,
)
def get_share(header, 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(
dash_data.tx_type.pack(gentx)[:-32 - 8 - 4],
cls.gentx_before_refhash),
merkle_link=dash_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(
dash_data.check_merkle_link(
dash_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 absheight abswork'.split(
' ')
def __init__(self, net, peer_addr, contents):
self.net = net
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 = dash_data.pubkey_hash_to_script2(
self.share_data['pubkey_hash'])
self.desired_version = self.share_data['desired_version']
self.absheight = self.share_info['absheight']
self.abswork = self.share_info['abswork']
n = set()
for share_count, tx_count in self.iter_transaction_hash_refs():
assert share_count < 110
if share_count == 0:
n.add(tx_count)
assert n == set(xrange(len(self.share_info['new_transaction_hashes'])))
self.gentx_hash = check_hash_link(
self.hash_link,
self.get_ref_hash(net, self.share_info,
contents['ref_merkle_link']) +
pack.IntType(64).pack(self.contents['last_txout_nonce']) +
pack.IntType(32).pack(0),
self.gentx_before_refhash,
)
merkle_root = dash_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(
dash_data.block_header_type.pack(self.header))
self.hash = self.header_hash = net.PARENT.BLOCKHASH_FUNC(
dash_data.block_header_type.pack(self.header))
if self.target > net.MAX_TARGET:
from p2pool import p2p
raise p2p.PeerMisbehavingError('share target invalid')
if self.pow_hash > self.target:
from p2pool import p2p
raise p2p.PeerMisbehavingError('share PoW invalid')
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_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:
previous_share = tracker.items[
self.share_data['previous_share_hash']]
if type(self) is type(previous_share):
pass
elif type(self) is type(previous_share).SUCCESSOR:
if tracker.get_height(
previous_share.hash) < self.net.CHAIN_LENGTH:
from p2pool import p2p
raise p2p.PeerMisbehavingError(
'switch without enough history')
# switch only valid if 85% of hashes in [self.net.CHAIN_LENGTH*9//10, self.net.CHAIN_LENGTH] for new version
counts = get_desired_version_counts(
tracker,
tracker.get_nth_parent_hash(
previous_share.hash, self.net.CHAIN_LENGTH * 9 // 10),
self.net.CHAIN_LENGTH // 10)
if counts.get(self.VERSION,
0) < sum(counts.itervalues()) * 85 // 100:
raise p2p.PeerMisbehavingError(
'switch without enough hash power upgraded')
else:
raise p2p.PeerMisbehavingError(
'''%s can't follow %s''' %
(type(self).__name__, type(previous_share).__name__))
other_tx_hashes = [
tracker.items[tracker.get_nth_parent_hash(
self.hash,
share_count)].share_info['new_transaction_hashes'][tx_count]
for share_count, tx_count in self.iter_transaction_hash_refs()
]
share_info, gentx, other_tx_hashes2, get_share = self.generate_transaction(
tracker,
self.share_info['share_data'],
self.header['bits'].target,
self.share_info['timestamp'],
self.share_info['bits'].target,
self.contents['ref_merkle_link'],
[(h, None) for h in other_tx_hashes],
self.net,
last_txout_nonce=self.contents['last_txout_nonce'])
assert other_tx_hashes2 == other_tx_hashes
if share_info != self.share_info:
raise ValueError('share_info invalid')
if dash_data.hash256(dash_data.tx_type.pack(gentx)) != self.gentx_hash:
raise ValueError('''gentx doesn't match hash_link''')
if dash_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 get_other_tx_hashes(self, tracker):
parents_needed = max(
share_count
for share_count, tx_count in self.iter_transaction_hash_refs(
)) if self.share_info['transaction_hash_refs'] else 0
parents = tracker.get_height(self.hash) - 1
if parents < parents_needed:
return None
last_shares = list(tracker.get_chain(self.hash, parents_needed + 1))
return [
last_shares[share_count].share_info['new_transaction_hashes']
[tx_count]
for share_count, tx_count in self.iter_transaction_hash_refs()
]
def _get_other_txs(self, tracker, known_txs):
other_tx_hashes = self.get_other_tx_hashes(tracker)
if other_tx_hashes is None:
return None # not all parents present
if not all(tx_hash in known_txs for tx_hash in other_tx_hashes):
return None # not all txs present
return [known_txs[tx_hash] for tx_hash in other_tx_hashes]
def should_punish_reason(self, previous_block, bits, tracker, known_txs):
if (self.header['previous_block'], self.header['bits']) != (
previous_block, bits
) and self.header_hash != previous_block and self.peer_addr is not None:
return True, 'Block-stale detected! height(%x) < height(%x) or %08x != %08x' % (
self.header['previous_block'], previous_block,
self.header['bits'].bits, bits.bits)
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:
pass
else:
all_txs_size = sum(
dash_data.tx_type.packed_size(tx) for tx in other_txs)
if all_txs_size > 2000000:
return True, 'txs over block size limit'
'''
new_txs_size = sum(dash_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)