def load_metadata(self, fileob):
from coro.asn1.data_file import DataFileReader
LOG('loading metadata', 'start')
t0 = timer()
max_block = 0
max_pos = 0
df = DataFileReader(fileob)
try:
info = df.read_object()
version = info[0]
assert (version == 1)
version, nblocks = info
for i in xrange(nblocks):
name, pos, num, prev = df.read_object()
name = Name(name)
prev = Name(prev)
self.blocks[name] = pos
max_pos = max(pos, max_pos)
self.prev[name] = prev
self.num_block.setdefault(num, set()).add(name)
self.block_num[name] = num
max_block = max(max_block, num)
self.last_block = max_block
except coro.asn1.ber.DecodeError:
LOG('error decoding metadata')
LOG('loading metadata', 'stop', t0.end(), self.last_block)
return max_pos
def load_state(self, path=None):
from coro.asn1.data_file import DataFileReader
from __main__ import G
if path is None:
path = os.path.join(G.args.base, self.save_path)
LOG('cache', 'start')
t0 = timer()
try:
f = open(path, 'rb')
df = DataFileReader(f)
info = df.read_object()
if info[0] < self.cache_version:
LOG('old cache version, ignoring')
return
assert (info[0] == self.cache_version) # version
[
_, self.height, self.block_name, self.total, self.lost,
self.fees, size
] = info
LOG('cache', self.height, size)
self.block_name = Name(self.block_name)
n = [0]
df.next = df.read_object
self.outpoints.build(df, size)
f.close()
LOG('cache', 'stop', len(self.outpoints), n[0])
LOG('cache', self.height, repr(self.block_name))
except IOError:
pass
LOG('cache', 'stop', t0.end())
def load_state(self, path=None):
from coro.asn1.data_file import DataFileReader
from __main__ import G
if path is None:
path = os.path.join(G.args.base, self.save_path)
W('loading outpoints cache...')
t0 = timer()
try:
f = open(path, 'rb')
df = DataFileReader(f)
info = df.read_object()
if info[0] < self.cache_version:
W('old cache version, ignoring...\n')
return
assert (info[0] == self.cache_version) # version
[
_, self.height, self.block_name, self.total, self.lost,
self.fees, size
] = info
W(' height = %d size = %d ...' % (self.height, size))
self.block_name = Name(self.block_name)
n = [0]
df.next = df.read_object
self.outpoints.build(df, size)
f.close()
W('[loaded outpoints %d/%d entries]' % (len(self.outpoints), n[0]))
W('\nlast block: %d %064x\n' % (self.height, self.block_name))
except IOError:
pass
W('...done (%.2fs)\n' % (t0.end(), ))
def gen_utxo(path='/usr/local/caesure/utxo.bin'):
f = open(path, 'rb')
df = DataFileReader(f)
info = df.read_object()
# note: first object is some metadata
[version, height, block_name, total, lost, fees, size] = info
try:
while 1:
# this is followed by (txname[:16], index, amt, script), ...
yield df.read_object()
except EOFError:
f.close()