self.shared = shared
self.config = config
self.up_to_date = False
- self.watched_addresses = []
+
+ self.watch_lock = threading.Lock()
+ self.watch_blocks = []
+ self.watch_headers = []
+ self.watched_addresses = {}
+
self.history_cache = {}
self.chunk_cache = {}
self.cache_lock = threading.Lock()
self.mempool_addresses = {}
self.mempool_hist = {}
- self.mempool_hashes = []
+ self.mempool_hashes = set([])
self.mempool_lock = threading.Lock()
self.address_queue = Queue()
self.dbpath = config.get('leveldb', 'path')
+ self.pruning_limit = config.getint('leveldb', 'pruning_limit')
+ self.db_version = 1 # increase this when database needs to be updated
self.dblock = threading.Lock()
try:
- self.db = leveldb.LevelDB(self.dbpath)
+ self.db = leveldb.LevelDB(self.dbpath, paranoid_checks=True)
except:
traceback.print_exc(file=sys.stdout)
self.shared.stop()
config.get('bitcoind', 'host'),
config.get('bitcoind', 'port'))
+ while True:
+ try:
+ self.bitcoind('getinfo')
+ break
+ except:
+ print_log('cannot contact bitcoind...')
+ time.sleep(5)
+ continue
+
self.height = 0
self.is_test = False
self.sent_height = 0
self.sent_header = None
try:
- hash_160 = bc_address_to_hash_160("1A1zP1eP5QGefi2DMPTfTL5SLmv7DivfNa")
- self.db.Get(hash_160)
- print_log("Your database '%s' is deprecated. Please create a new database"%self.dbpath)
- self.shared.stop()
- return
- except:
- pass
-
- try:
hist = self.deserialize(self.db.Get('height'))
- self.last_hash, self.height, _ = hist[0]
- print_log("hist", hist)
+ self.last_hash, self.height, db_version = hist[0]
+ print_log("Database version", self.db_version)
+ print_log("Blockchain height", self.height)
except:
- #traceback.print_exc(file=sys.stdout)
+ traceback.print_exc(file=sys.stdout)
print_log('initializing database')
self.height = 0
self.last_hash = '000000000019d6689c085ae165831e934ff763ae46a2a6c172b3f1b60a8ce26f'
+ db_version = self.db_version
+
+ # check version
+ if self.db_version != db_version:
+ print_log("Your database '%s' is deprecated. Please create a new database"%self.dbpath)
+ self.shared.stop()
+ return
# catch_up headers
self.init_headers(self.height)
shared.stop()
sys.exit(0)
- print_log("blockchain is up to date.")
+ print_log("Blockchain is up to date.")
+ self.memorypool_update()
+ print_log("Memory pool initialized.")
threading.Timer(10, self.main_iteration).start()
def serialize(self, h):
s = ''
for txid, txpos, height in h:
- s += txid + int_to_hex(txpos, 4) + int_to_hex(height, 4)
- return s.decode('hex')
+ s += self.serialize_item(txid, txpos, height)
+ return s
+
+ def serialize_item(self, txid, txpos, height, spent=chr(0)):
+ s = (txid + int_to_hex(txpos, 4) + int_to_hex(height, 3)).decode('hex') + spent
+ return s
+
+ def deserialize_item(self,s):
+ txid = s[0:32].encode('hex')
+ txpos = int(rev_hex(s[32:36].encode('hex')), 16)
+ height = int(rev_hex(s[36:39].encode('hex')), 16)
+ spent = s[39:40]
+ return (txid, txpos, height, spent)
def deserialize(self, s):
h = []
while s:
- txid = s[0:32].encode('hex')
- txpos = int(rev_hex(s[32:36].encode('hex')), 16)
- height = int(rev_hex(s[36:40].encode('hex')), 16)
+ txid, txpos, height, spent = self.deserialize_item(s[0:40])
h.append((txid, txpos, height))
- s = s[40:]
+ if spent == chr(1):
+ txid, txpos, height, spent = self.deserialize_item(s[40:80])
+ h.append((txid, txpos, height))
+ s = s[80:]
return h
def block2header(self, b):
def get_mempool_transaction(self, txid):
try:
- raw_tx = self.bitcoind('getrawtransaction', [txid, 0, -1])
+ raw_tx = self.bitcoind('getrawtransaction', [txid, 0])
except:
return None
vds = deserialize.BCDataStream()
vds.write(raw_tx.decode('hex'))
-
- return deserialize.parse_Transaction(vds, is_coinbase=False)
+ try:
+ return deserialize.parse_Transaction(vds, is_coinbase=False)
+ except:
+ print_log("ERROR: cannot parse", txid)
+ return None
def get_history(self, addr, cache_only=False):
with self.cache_lock:
hist = []
is_known = False
- # should not be necessary
+ # sort history, because redeeming transactions are next to the corresponding txout
hist.sort(key=lambda tup: tup[2])
- # check uniqueness too...
# add memory pool
with self.mempool_lock:
for txid in self.mempool_hist.get(addr, []):
hist.append((txid, 0, 0))
- hist = map(lambda x: {'tx_hash': x[0], 'height': x[2]}, hist)
+ # uniqueness
+ hist = set(map(lambda x: (x[0], x[2]), hist))
+
+ # convert to dict
+ hist = map(lambda x: {'tx_hash': x[0], 'height': x[1]}, hist)
+
# add something to distinguish between unused and empty addresses
if hist == [] and is_known:
hist = ['*']
return {"block_height": height, "merkle": s, "pos": tx_pos}
+
def add_to_history(self, addr, tx_hash, tx_pos, tx_height):
# keep it sorted
- s = (tx_hash + int_to_hex(tx_pos, 4) + int_to_hex(tx_height, 4)).decode('hex')
+ s = self.serialize_item(tx_hash, tx_pos, tx_height) + 40*chr(0)
+ assert len(s) == 80
serialized_hist = self.batch_list[addr]
- l = len(serialized_hist)/40
+ l = len(serialized_hist)/80
for i in range(l-1, -1, -1):
- item = serialized_hist[40*i:40*(i+1)]
- item_height = int(rev_hex(item[36:40].encode('hex')), 16)
- if item_height < tx_height:
- serialized_hist = serialized_hist[0:40*(i+1)] + s + serialized_hist[40*(i+1):]
+ item = serialized_hist[80*i:80*(i+1)]
+ item_height = int(rev_hex(item[36:39].encode('hex')), 16)
+ if item_height <= tx_height:
+ serialized_hist = serialized_hist[0:80*(i+1)] + s + serialized_hist[80*(i+1):]
break
else:
serialized_hist = s + serialized_hist
txo = (tx_hash + int_to_hex(tx_pos, 4)).decode('hex')
self.batch_txio[txo] = addr
- def remove_from_history(self, addr, tx_hash, tx_pos):
- txi = (tx_hash + int_to_hex(tx_pos, 4)).decode('hex')
- if addr is None:
- try:
- addr = self.batch_txio[txi]
- except:
- raise BaseException(tx_hash, tx_pos)
+
+ def revert_add_to_history(self, addr, tx_hash, tx_pos, tx_height):
serialized_hist = self.batch_list[addr]
+ s = self.serialize_item(tx_hash, tx_pos, tx_height) + 40*chr(0)
+ if serialized_hist.find(s) == -1: raise
+ serialized_hist = serialized_hist.replace(s, '')
+ self.batch_list[addr] = serialized_hist
+
+
- l = len(serialized_hist)/40
+ def prune_history(self, addr, undo):
+ # remove items that have bit set to one
+ if undo.get(addr) is None: undo[addr] = []
+
+ serialized_hist = self.batch_list[addr]
+ l = len(serialized_hist)/80
for i in range(l):
- item = serialized_hist[40*i:40*(i+1)]
+ if len(serialized_hist)/80 < self.pruning_limit: break
+ item = serialized_hist[80*i:80*(i+1)]
+ if item[39:40] == chr(1):
+ assert item[79:80] == chr(2)
+ serialized_hist = serialized_hist[0:80*i] + serialized_hist[80*(i+1):]
+ undo[addr].append(item) # items are ordered
+ self.batch_list[addr] = serialized_hist
+
+
+ def revert_prune_history(self, addr, undo):
+ # restore removed items
+ serialized_hist = self.batch_list[addr]
+
+ if undo.get(addr) is not None:
+ itemlist = undo.pop(addr)
+ else:
+ return
+
+ if not itemlist: return
+
+ l = len(serialized_hist)/80
+ tx_item = ''
+ for i in range(l-1, -1, -1):
+ if tx_item == '':
+ if not itemlist:
+ break
+ else:
+ tx_item = itemlist.pop(-1) # get the last element
+ tx_height = int(rev_hex(tx_item[36:39].encode('hex')), 16)
+
+ item = serialized_hist[80*i:80*(i+1)]
+ item_height = int(rev_hex(item[36:39].encode('hex')), 16)
+
+ if item_height < tx_height:
+ serialized_hist = serialized_hist[0:80*(i+1)] + tx_item + serialized_hist[80*(i+1):]
+ tx_item = ''
+
+ else:
+ serialized_hist = ''.join(itemlist) + tx_item + serialized_hist
+
+ self.batch_list[addr] = serialized_hist
+
+
+ def set_spent_bit(self, addr, txi, is_spent, txid=None, index=None, height=None):
+ serialized_hist = self.batch_list[addr]
+ l = len(serialized_hist)/80
+ for i in range(l):
+ item = serialized_hist[80*i:80*(i+1)]
if item[0:36] == txi:
- height = int(rev_hex(item[36:40].encode('hex')), 16)
- serialized_hist = serialized_hist[0:40*i] + serialized_hist[40*(i+1):]
+ if is_spent:
+ new_item = item[0:39] + chr(1) + self.serialize_item(txid, index, height, chr(2))
+ else:
+ new_item = item[0:39] + chr(0) + chr(0)*40
+ serialized_hist = serialized_hist[0:80*i] + new_item + serialized_hist[80*(i+1):]
break
else:
+ self.shared.stop()
hist = self.deserialize(serialized_hist)
- raise BaseException("prevout not found", addr, hist, tx_hash, tx_pos)
+ raise BaseException("prevout not found", addr, hist, txi.encode('hex'))
self.batch_list[addr] = serialized_hist
- return height, addr
+
+
+ def unset_spent_bit(self, addr, txi):
+ self.set_spent_bit(addr, txi, False)
+ self.batch_txio[txi] = addr
+
def deserialize_block(self, block):
txlist = block.get('tx')
is_coinbase = True
for raw_tx in txlist:
tx_hash = hash_encode(Hash(raw_tx.decode('hex')))
- tx_hashes.append(tx_hash)
vds = deserialize.BCDataStream()
vds.write(raw_tx.decode('hex'))
- tx = deserialize.parse_Transaction(vds, is_coinbase)
+ try:
+ tx = deserialize.parse_Transaction(vds, is_coinbase)
+ except:
+ print_log("ERROR: cannot parse", tx_hash)
+ continue
+ tx_hashes.append(tx_hash)
txdict[tx_hash] = tx
is_coinbase = False
return tx_hashes, txdict
t00 = time.time()
+ # undo info
+ if revert:
+ undo_info = self.get_undo_info(block_height)
+ else:
+ undo_info = {}
+
+
if not revert:
# read addresses of tx inputs
for tx in txdict.values():
for txi in block_inputs:
try:
addr = self.db.Get(txi)
- except:
+ except KeyError:
# the input could come from the same block
continue
+ except:
+ traceback.print_exc(file=sys.stdout)
+ self.shared.stop()
+ raise
+
self.batch_txio[txi] = addr
addr_to_read.append(addr)
for x in tx.get('outputs'):
txo = (txid + int_to_hex(x.get('index'), 4)).decode('hex')
block_outputs.append(txo)
+ addr_to_read.append( x.get('address') )
+
+ undo = undo_info.get(txid)
+ for i, x in enumerate(tx.get('inputs')):
+ addr = undo['prev_addr'][i]
+ addr_to_read.append(addr)
+
+
+
+
# read histories of addresses
for txid, tx in txdict.items():
for addr in addr_to_read:
try:
self.batch_list[addr] = self.db.Get(addr)
- except:
+ except KeyError:
self.batch_list[addr] = ''
+ except:
+ traceback.print_exc(file=sys.stdout)
+ self.shared.stop()
+ raise
- if revert:
- undo_info = self.get_undo_info(block_height)
- # print "undo", block_height, undo_info
- else:
- undo_info = {}
# process
t1 = time.time()
if revert:
tx_hashes = tx_hashes[::-1]
+
+
for txid in tx_hashes: # must be ordered
tx = txdict[txid]
if not revert:
- undo = []
- for x in tx.get('inputs'):
- prevout_height, prevout_addr = self.remove_from_history(None, x.get('prevout_hash'), x.get('prevout_n'))
- undo.append((prevout_height, prevout_addr))
- undo_info[txid] = undo
+ undo = { 'prev_addr':[] } # contains the list of pruned items for each address in the tx; also, 'prev_addr' is a list of prev addresses
+
+ prev_addr = []
+ for i, x in enumerate(tx.get('inputs')):
+ txi = (x.get('prevout_hash') + int_to_hex(x.get('prevout_n'), 4)).decode('hex')
+ addr = self.batch_txio[txi]
+
+ # add redeem item to the history.
+ # add it right next to the input txi? this will break history sorting, but it's ok if I neglect tx inputs during search
+ self.set_spent_bit(addr, txi, True, txid, i, block_height)
+ # when I prune, prune a pair
+ self.prune_history(addr, undo)
+ prev_addr.append(addr)
+
+ undo['prev_addr'] = prev_addr
+
+ # here I add only the outputs to history; maybe I want to add inputs too (that's in the other loop)
for x in tx.get('outputs'):
- self.add_to_history(x.get('address'), txid, x.get('index'), block_height)
+ addr = x.get('address')
+ self.add_to_history(addr, txid, x.get('index'), block_height)
+ self.prune_history(addr, undo) # prune here because we increased the length of the history
+
+ undo_info[txid] = undo
else:
+
+ undo = undo_info.pop(txid)
+
for x in tx.get('outputs'):
- self.remove_from_history(x.get('address'), txid, x.get('index'))
+ addr = x.get('address')
+ self.revert_prune_history(addr, undo)
+ self.revert_add_to_history(addr, txid, x.get('index'), block_height)
+
+ prev_addr = undo.pop('prev_addr')
+ for i, x in enumerate(tx.get('inputs')):
+ addr = prev_addr[i]
+ self.revert_prune_history(addr, undo)
+ txi = (x.get('prevout_hash') + int_to_hex(x.get('prevout_n'), 4)).decode('hex')
+ self.unset_spent_bit(addr, txi)
- i = 0
- for x in tx.get('inputs'):
- prevout_height, prevout_addr = undo_info.get(txid)[i]
- i += 1
+ assert undo == {}
- # read the history into batch list
- if self.batch_list.get(prevout_addr) is None:
- self.batch_list[prevout_addr] = self.db.Get(prevout_addr)
+ if revert:
+ assert undo_info == {}
- # re-add them to the history
- self.add_to_history(prevout_addr, x.get('prevout_hash'), x.get('prevout_n'), prevout_height)
- # print_log("new hist for", prevout_addr, self.deserialize(self.batch_list[prevout_addr]) )
# write
max_len = 0
batch = leveldb.WriteBatch()
for addr, serialized_hist in self.batch_list.items():
batch.Put(addr, serialized_hist)
- l = len(serialized_hist)
+ l = len(serialized_hist)/80
if l > max_len:
max_len = l
max_addr = addr
else:
# restore spent inputs
for txio, addr in self.batch_txio.items():
+ # print "restoring spent input", repr(txio)
batch.Put(txio, addr)
# delete spent outputs
for txo in block_outputs:
batch.Delete(txo)
# add the max
- batch.Put('height', self.serialize([(block_hash, block_height, 0)]))
+ batch.Put('height', self.serialize([(block_hash, block_height, self.db_version)]))
# actual write
self.db.Write(batch, sync=sync)
for addr in self.batch_list.keys():
self.invalidate_cache(addr)
- def add_request(self, request):
+ def add_request(self, session, request):
# see if we can get if from cache. if not, add to queue
- if self.process(request, cache_only=True) == -1:
- self.queue.put(request)
+ if self.process(session, request, cache_only=True) == -1:
+ self.queue.put((session, request))
- def process(self, request, cache_only=False):
- #print "abe process", request
+
+
+ def process(self, session, request, cache_only=False):
+
message_id = request['id']
method = request['method']
params = request.get('params', [])
error = None
if method == 'blockchain.numblocks.subscribe':
+ with self.watch_lock:
+ if session not in self.watch_blocks:
+ self.watch_blocks.append(session)
result = self.height
elif method == 'blockchain.headers.subscribe':
+ with self.watch_lock:
+ if session not in self.watch_headers:
+ self.watch_headers.append(session)
result = self.header
elif method == 'blockchain.address.subscribe':
try:
address = params[0]
result = self.get_status(address, cache_only)
- self.watch_address(address)
- except BaseException, e:
- error = str(e) + ': ' + address
- print_log("error:", error)
+ with self.watch_lock:
+ l = self.watched_addresses.get(address)
+ if l is None:
+ self.watched_addresses[address] = [session]
+ elif session not in l:
+ l.append(session)
- elif method == 'blockchain.address.unsubscribe':
- try:
- password = params[0]
- address = params[1]
- if password == self.config.get('server', 'password'):
- self.watched_addresses.remove(address)
- # print_log('unsubscribed', address)
- result = "ok"
- else:
- print_log('incorrect password')
- result = "authentication error"
except BaseException, e:
error = str(e) + ': ' + address
print_log("error:", error)
+
elif method == 'blockchain.address.get_history':
try:
address = params[0]
elif method == 'blockchain.transaction.get':
try:
tx_hash = params[0]
- height = params[1]
- result = self.bitcoind('getrawtransaction', [tx_hash, 0, height])
+ result = self.bitcoind('getrawtransaction', [tx_hash, 0])
except BaseException, e:
error = str(e) + ': ' + repr(params)
print_log("tx get error:", error)
return -1
if error:
- self.push_response({'id': message_id, 'error': error})
+ self.push_response(session, {'id': message_id, 'error': error})
elif result != '':
- self.push_response({'id': message_id, 'result': result})
+ self.push_response(session, {'id': message_id, 'result': result})
+
+
+ def getfullblock(self, block_hash):
+ block = self.bitcoind('getblock', [block_hash])
+
+ rawtxreq = []
+ i = 0
+ for txid in block['tx']:
+ rawtxreq.append({
+ "method": "getrawtransaction",
+ "params": [txid],
+ "id": i,
+ })
+ i += 1
- def watch_address(self, addr):
- if addr not in self.watched_addresses:
- self.watched_addresses.append(addr)
+ postdata = dumps(rawtxreq)
+ try:
+ respdata = urllib.urlopen(self.bitcoind_url, postdata).read()
+ except:
+ traceback.print_exc(file=sys.stdout)
+ self.shared.stop()
+
+ r = loads(respdata)
+ rawtxdata = []
+ for ir in r:
+ if ir['error'] is not None:
+ self.shared.stop()
+ print_log("Error: make sure you run bitcoind with txindex=1; use -reindex if needed.")
+ raise BaseException(ir['error'])
+ rawtxdata.append(ir['result'])
+ block['tx'] = rawtxdata
+ return block
def catch_up(self, sync=True):
t1 = time.time()
# not done..
self.up_to_date = False
next_block_hash = self.bitcoind('getblockhash', [self.height + 1])
- next_block = self.bitcoind('getblock', [next_block_hash, 1])
+ next_block = self.getfullblock(next_block_hash)
# fixme: this is unsafe, if we revert when the undo info is not yet written
revert = (random.randint(1, 100) == 1) if self.is_test else False
else:
# revert current block
- block = self.bitcoind('getblock', [self.last_hash, 1])
+ block = self.getfullblock(self.last_hash)
print_log("blockchain reorg", self.height, block.get('previousblockhash'), self.last_hash)
self.import_block(block, self.last_hash, self.height, sync, revert=True)
self.pop_header()
self.header = self.block2header(self.bitcoind('getblock', [self.last_hash]))
+
def memorypool_update(self):
- mempool_hashes = self.bitcoind('getrawmempool')
+ mempool_hashes = set(self.bitcoind('getrawmempool'))
+ touched_addresses = set([])
for tx_hash in mempool_hashes:
if tx_hash in self.mempool_hashes:
if not tx:
continue
+ mpa = self.mempool_addresses.get(tx_hash, [])
for x in tx.get('inputs'):
- txi = (x.get('prevout_hash') + int_to_hex(x.get('prevout_n'), 4)).decode('hex')
- try:
- addr = self.db.Get(txi)
- except:
- continue
- l = self.mempool_addresses.get(tx_hash, [])
- if addr not in l:
- l.append(addr)
- self.mempool_addresses[tx_hash] = l
+ # we assume that the input address can be parsed by deserialize(); this is true for Electrum transactions
+ addr = x.get('address')
+ if addr and addr not in mpa:
+ mpa.append(addr)
+ touched_addresses.add(addr)
for x in tx.get('outputs'):
addr = x.get('address')
- l = self.mempool_addresses.get(tx_hash, [])
- if addr not in l:
- l.append(addr)
- self.mempool_addresses[tx_hash] = l
+ if addr and addr not in mpa:
+ mpa.append(addr)
+ touched_addresses.add(addr)
- self.mempool_hashes.append(tx_hash)
+ self.mempool_addresses[tx_hash] = mpa
+ self.mempool_hashes.add(tx_hash)
# remove older entries from mempool_hashes
self.mempool_hashes = mempool_hashes
for tx_hash, addresses in self.mempool_addresses.items():
if tx_hash not in self.mempool_hashes:
self.mempool_addresses.pop(tx_hash)
+ for addr in addresses:
+ touched_addresses.add(addr)
# rebuild mempool histories
new_mempool_hist = {}
h.append(tx_hash)
new_mempool_hist[addr] = h
- # invalidate cache for mempool addresses whose mempool history has changed
- new_mempool_hist_keys = new_mempool_hist.keys()
- self_mempool_hist_keys = self.mempool_hist.keys()
-
- for addr in new_mempool_hist_keys:
- if addr in self_mempool_hist_keys:
- if self.mempool_hist[addr] != new_mempool_hist[addr]:
- self.invalidate_cache(addr)
- else:
- self.invalidate_cache(addr)
-
- # invalidate cache for addresses that are removed from mempool ?
- # this should not be necessary if they go into a block, but they might not
- for addr in self_mempool_hist_keys:
- if addr not in new_mempool_hist_keys:
- self.invalidate_cache(addr)
-
-
with self.mempool_lock:
self.mempool_hist = new_mempool_hist
+ # invalidate cache for touched addresses
+ for addr in touched_addresses:
+ self.invalidate_cache(addr)
+
+
def invalidate_cache(self, address):
with self.cache_lock:
if address in self.history_cache:
print_log("cache: invalidating", address)
self.history_cache.pop(address)
- if address in self.watched_addresses:
- self.address_queue.put(address)
+ with self.watch_lock:
+ sessions = self.watched_addresses.get(address)
+
+ if sessions:
+ # TODO: update cache here. if new value equals cached value, do not send notification
+ self.address_queue.put((address,sessions))
def main_iteration(self):
if self.shared.stopped():
t2 = time.time()
self.memorypool_update()
- t3 = time.time()
- # print "mempool:", len(self.mempool_addresses), len(self.mempool_hist), "%.3fs"%(t3 - t2)
if self.sent_height != self.height:
self.sent_height = self.height
- self.push_response({
- 'id': None,
- 'method': 'blockchain.numblocks.subscribe',
- 'params': [self.height],
- })
+ for session in self.watch_blocks:
+ self.push_response(session, {
+ 'id': None,
+ 'method': 'blockchain.numblocks.subscribe',
+ 'params': [self.height],
+ })
if self.sent_header != self.header:
print_log("blockchain: %d (%.3fs)" % (self.height, t2 - t1))
self.sent_header = self.header
- self.push_response({
- 'id': None,
- 'method': 'blockchain.headers.subscribe',
- 'params': [self.header],
- })
+ for session in self.watch_headers:
+ self.push_response(session, {
+ 'id': None,
+ 'method': 'blockchain.headers.subscribe',
+ 'params': [self.header],
+ })
while True:
try:
- addr = self.address_queue.get(False)
+ addr, sessions = self.address_queue.get(False)
except:
break
- if addr in self.watched_addresses:
- status = self.get_status(addr)
- self.push_response({
- 'id': None,
- 'method': 'blockchain.address.subscribe',
- 'params': [addr, status],
- })
+
+ status = self.get_status(addr)
+ for session in sessions:
+ self.push_response(session, {
+ 'id': None,
+ 'method': 'blockchain.address.subscribe',
+ 'params': [addr, status],
+ })
if not self.shared.stopped():
threading.Timer(10, self.main_iteration).start()
git://git.novaco.in / electrum-server.git / blobdiff