+import ast
+import hashlib
from json import dumps, loads
-import leveldb, urllib
-import deserialize
-import ast, time, threading, hashlib
+import leveldb
+import os
from Queue import Queue
-import traceback, sys, os
-
-
-
-Hash = lambda x: hashlib.sha256(hashlib.sha256(x).digest()).digest()
-hash_encode = lambda x: x[::-1].encode('hex')
-hash_decode = lambda x: x.decode('hex')[::-1]
-
-
-
-def rev_hex(s):
- return s.decode('hex')[::-1].encode('hex')
-
-
-def int_to_hex(i, length=1):
- s = hex(i)[2:].rstrip('L')
- s = "0"*(2*length - len(s)) + s
- return rev_hex(s)
-
-def header_to_string(res):
- pbh = res.get('prev_block_hash')
- if pbh is None: pbh = '0'*64
- s = int_to_hex(res.get('version'),4) \
- + rev_hex(pbh) \
- + rev_hex(res.get('merkle_root')) \
- + int_to_hex(int(res.get('timestamp')),4) \
- + int_to_hex(int(res.get('bits')),4) \
- + int_to_hex(int(res.get('nonce')),4)
- return s
-
-def header_from_string( s):
- hex_to_int = lambda s: eval('0x' + s[::-1].encode('hex'))
- h = {}
- h['version'] = hex_to_int(s[0:4])
- h['prev_block_hash'] = hash_encode(s[4:36])
- h['merkle_root'] = hash_encode(s[36:68])
- h['timestamp'] = hex_to_int(s[68:72])
- h['bits'] = hex_to_int(s[72:76])
- h['nonce'] = hex_to_int(s[76:80])
- return h
-
-
-
-
+import random
+import sys
+import time
+import threading
+import traceback
+import urllib
+
+from backends.bitcoind import deserialize
from processor import Processor, print_log
+from utils import *
+
class BlockchainProcessor(Processor):
Processor.__init__(self)
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()
self.bitcoind_url = 'http://%s:%s@%s:%s/' % (
- config.get('bitcoind','user'),
- config.get('bitcoind','password'),
- config.get('bitcoind','host'),
- config.get('bitcoind','port'))
+ config.get('bitcoind', 'user'),
+ config.get('bitcoind', 'password'),
+ 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:
- hist = self.deserialize(self.db.Get('0'))
- self.last_hash, self.height, _ = hist[0]
- print_log( "hist", hist )
+ hist = self.deserialize(self.db.Get('height'))
+ 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 bitcoind(self, method, params=[]):
- postdata = dumps({"method": method, 'params': params, 'id':'jsonrpc'})
- respdata = urllib.urlopen(self.bitcoind_url, postdata).read()
+ postdata = dumps({"method": method, 'params': params, 'id': 'jsonrpc'})
+ try:
+ respdata = urllib.urlopen(self.bitcoind_url, postdata).read()
+ except:
+ traceback.print_exc(file=sys.stdout)
+ self.shared.stop()
+
r = loads(respdata)
- if r['error'] != None:
+ if r['error'] is not None:
raise BaseException(r['error'])
return r.get('result')
-
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 )
- h.append( ( txid, txpos, height ) )
- s = s[40:]
+ txid, txpos, height, spent = self.deserialize_item(s[0:40])
+ h.append((txid, txpos, height))
+ 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):
- return {"block_height":b.get('height'), "version":b.get('version'), "prev_block_hash":b.get('previousblockhash'),
- "merkle_root":b.get('merkleroot'), "timestamp":b.get('time'), "bits":int(b.get('bits'),16), "nonce":b.get('nonce')}
-
+ return {
+ "block_height": b.get('height'),
+ "version": b.get('version'),
+ "prev_block_hash": b.get('previousblockhash'),
+ "merkle_root": b.get('merkleroot'),
+ "timestamp": b.get('time'),
+ "bits": int(b.get('bits'), 16),
+ "nonce": b.get('nonce'),
+ }
def get_header(self, height):
block_hash = self.bitcoind('getblockhash', [height])
b = self.bitcoind('getblock', [block_hash])
return self.block2header(b)
-
def init_headers(self, db_height):
self.chunk_cache = {}
- self.headers_filename = os.path.join( self.dbpath, 'blockchain_headers')
+ self.headers_filename = os.path.join(self.dbpath, 'blockchain_headers')
if os.path.exists(self.headers_filename):
height = os.path.getsize(self.headers_filename)/80 - 1 # the current height
else:
prev_hash = None
else:
- open(self.headers_filename,'wb').close()
+ open(self.headers_filename, 'wb').close()
prev_hash = None
height = -1
if height < db_height:
- print_log( "catching up missing headers:", height, db_height)
+ print_log("catching up missing headers:", height, db_height)
try:
- while height != db_height:
+ while height < db_height:
height = height + 1
header = self.get_header(height)
- if height>1:
+ if height > 1:
assert prev_hash == header.get('prev_block_hash')
self.write_header(header, sync=False)
prev_hash = self.hash_header(header)
- if height%1000==0: print_log("headers file:",height)
+ if (height % 1000) == 0:
+ print_log("headers file:", height)
except KeyboardInterrupt:
self.flush_headers()
sys.exit()
self.flush_headers()
-
def hash_header(self, header):
return rev_hex(Hash(header_to_string(header).decode('hex')).encode('hex'))
-
def read_header(self, block_height):
if os.path.exists(self.headers_filename):
- f = open(self.headers_filename,'rb')
- f.seek(block_height*80)
- h = f.read(80)
- f.close()
+ with open(self.headers_filename, 'rb') as f:
+ f.seek(block_height * 80)
+ h = f.read(80)
if len(h) == 80:
h = header_from_string(h)
return h
-
def read_chunk(self, index):
- f = open(self.headers_filename,'rb')
- f.seek(index*2016*80)
- chunk = f.read(2016*80)
- f.close()
+ with open(self.headers_filename, 'rb') as f:
+ f.seek(index*2016*80)
+ chunk = f.read(2016*80)
return chunk.encode('hex')
-
def write_header(self, header, sync=True):
if not self.headers_data:
self.headers_offset = header.get('block_height')
if sync or len(self.headers_data) > 40*100:
self.flush_headers()
+ with self.cache_lock:
+ chunk_index = header.get('block_height')/2016
+ if self.chunk_cache.get(chunk_index):
+ self.chunk_cache.pop(chunk_index)
+
def pop_header(self):
# we need to do this only if we have not flushed
if self.headers_data:
self.headers_data = self.headers_data[:-40]
def flush_headers(self):
- if not self.headers_data: return
- f = open(self.headers_filename,'rb+')
- f.seek(self.headers_offset*80)
- f.write(self.headers_data)
- f.close()
+ if not self.headers_data:
+ return
+ with open(self.headers_filename, 'rb+') as f:
+ f.seek(self.headers_offset*80)
+ f.write(self.headers_data)
self.headers_data = ''
-
def get_chunk(self, i):
# store them on disk; store the current chunk in memory
- chunk = self.chunk_cache.get(i)
- if not chunk:
- chunk = self.read_chunk(i)
- self.chunk_cache[i] = chunk
+ with self.cache_lock:
+ chunk = self.chunk_cache.get(i)
+ if not chunk:
+ chunk = self.read_chunk(i)
+ self.chunk_cache[i] = chunk
+
return chunk
+ def get_mempool_transaction(self, txid):
+ try:
+ raw_tx = self.bitcoind('getrawtransaction', [txid, 0])
+ except:
+ return None
- def get_transaction(self, txid, block_height=-1, is_coinbase = False):
- raw_tx = self.bitcoind('getrawtransaction', [txid, 0, block_height])
vds = deserialize.BCDataStream()
vds.write(raw_tx.decode('hex'))
- out = deserialize.parse_Transaction(vds, is_coinbase)
- return out
-
+ 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 = self.history_cache.get( addr )
- if hist is not None: return hist
- if cache_only: return -1
+ with self.cache_lock:
+ hist = self.history_cache.get(addr)
+ if hist is not None:
+ return hist
+ if cache_only:
+ return -1
with self.dblock:
try:
hist = self.deserialize(self.db.Get(addr))
is_known = True
- except:
+ except:
hist = []
is_known = False
- # should not be necessary
- hist.sort( key=lambda tup: tup[1])
- # check uniqueness too...
+ # sort history, because redeeming transactions are next to the corresponding txout
+ hist.sort(key=lambda tup: tup[2])
# add memory pool
with self.mempool_lock:
- for txid in self.mempool_hist.get(addr,[]):
+ 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 = ['*']
+ if hist == [] and is_known:
+ hist = ['*']
- with self.cache_lock: self.history_cache[addr] = hist
+ with self.cache_lock:
+ self.history_cache[addr] = hist
return hist
-
def get_status(self, addr, cache_only=False):
tx_points = self.get_history(addr, cache_only)
- if cache_only and tx_points == -1: return -1
+ if cache_only and tx_points == -1:
+ return -1
- if not tx_points: return None
- if tx_points == ['*']: return '*'
+ if not tx_points:
+ return None
+ if tx_points == ['*']:
+ return '*'
status = ''
for tx in tx_points:
status += tx.get('tx_hash') + ':%d:' % tx.get('height')
- return hashlib.sha256( status ).digest().encode('hex')
-
+ return hashlib.sha256(status).digest().encode('hex')
def get_merkle(self, tx_hash, height):
b = self.bitcoind('getblock', [block_hash])
tx_list = b.get('tx')
tx_pos = tx_list.index(tx_hash)
-
+
merkle = map(hash_decode, tx_list)
target_hash = hash_decode(tx_hash)
s = []
while len(merkle) != 1:
- if len(merkle)%2: merkle.append( merkle[-1] )
+ if len(merkle) % 2:
+ merkle.append(merkle[-1])
n = []
while merkle:
- new_hash = Hash( merkle[0] + merkle[1] )
+ new_hash = Hash(merkle[0] + merkle[1])
if merkle[0] == target_hash:
- s.append( hash_encode( merkle[1]))
+ s.append(hash_encode(merkle[1]))
target_hash = new_hash
elif merkle[1] == target_hash:
- s.append( hash_encode( merkle[0]))
+ s.append(hash_encode(merkle[0]))
target_hash = new_hash
- n.append( new_hash )
+ n.append(new_hash)
merkle = merkle[2:]
merkle = n
- return {"block_height":height, "merkle":s, "pos":tx_pos}
+ return {"block_height": height, "merkle": s, "pos": tx_pos}
-
- def add_to_batch(self, addr, tx_hash, tx_pos, tx_height):
- # we do it chronologically, so nothing wrong can happen...
- s = (tx_hash + int_to_hex(tx_pos, 4) + int_to_hex(tx_height, 4)).decode('hex')
- self.batch_list[addr] += s
+ def add_to_history(self, addr, tx_hash, tx_pos, tx_height):
+ # keep it sorted
+ 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)/80
+ for i in range(l-1, -1, -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
+
+ self.batch_list[addr] = serialized_hist
# backlink
txo = (tx_hash + int_to_hex(tx_pos, 4)).decode('hex')
self.batch_txio[txo] = addr
- def remove_from_batch(self, tx_hash, tx_pos):
-
- txi = (tx_hash + int_to_hex(tx_pos, 4)).decode('hex')
- try:
- addr = self.batch_txio[txi]
- except:
- #raise BaseException(tx_hash, tx_pos)
- print "WARNING: cannot find address for", (tx_hash, tx_pos)
- return
+ 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
+
+
+
+ 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):
+ 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]
- l = len(serialized_hist)/40
+ 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):
- if serialized_hist[40*i:40*i+36] == txi:
- serialized_hist = serialized_hist[0:40*i] + serialized_hist[40*(i+1):]
+ item = serialized_hist[80*i:80*(i+1)]
+ if item[0:36] == txi:
+ 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:
- raise BaseException("prevout not found", addr, hist, tx_hash, tx_pos)
+ self.shared.stop()
+ hist = self.deserialize(serialized_hist)
+ raise BaseException("prevout not found", addr, hist, txi.encode('hex'))
+
self.batch_list[addr] = serialized_hist
+ 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')
tx_hashes = [] # ordered txids
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
+ def get_undo_info(self, height):
+ s = self.db.Get("undo%d" % (height % 100))
+ return eval(s)
+
+ def write_undo_info(self, batch, height, undo_info):
+ if self.is_test or height > self.bitcoind_height - 100:
+ batch.Put("undo%d" % (height % 100), repr(undo_info))
def import_block(self, block, block_hash, block_height, sync, revert=False):
self.batch_list = {} # address -> history
self.batch_txio = {} # transaction i/o -> address
- inputs_to_read = []
+ block_inputs = []
+ block_outputs = []
addr_to_read = []
# deserialize transactions
t0 = time.time()
tx_hashes, txdict = self.deserialize_block(block)
- # read addresses of tx inputs
t00 = time.time()
- for tx in txdict.values():
- for x in tx.get('inputs'):
- txi = (x.get('prevout_hash') + int_to_hex(x.get('prevout_n'), 4)).decode('hex')
- inputs_to_read.append(txi)
- inputs_to_read.sort()
- for txi in inputs_to_read:
- try:
- addr = self.db.Get(txi)
- except:
- # the input could come from the same block
- continue
- self.batch_txio[txi] = addr
- addr_to_read.append(addr)
+ # 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 x in tx.get('inputs'):
+ txi = (x.get('prevout_hash') + int_to_hex(x.get('prevout_n'), 4)).decode('hex')
+ block_inputs.append(txi)
+
+ block_inputs.sort()
+ for txi in block_inputs:
+ try:
+ addr = self.db.Get(txi)
+ 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)
+
+ else:
+ for txid, tx in txdict.items():
+ 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
+
+
# process
t1 = time.time()
- for txid in tx_hashes: # must be ordered
+ if revert:
+ tx_hashes = tx_hashes[::-1]
+
+
+ for txid in tx_hashes: # must be ordered
tx = txdict[txid]
if not revert:
- for x in tx.get('inputs'):
- self.remove_from_batch( x.get('prevout_hash'), x.get('prevout_n'))
+
+ 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_batch( 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_batch( x.get('prevout_hash'), x.get('prevout_n'))
- for x in tx.get('inputs'):
- self.add_to_batch( x.get('address'), txid, x.get('index'), block_height)
+ 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)
+
+ assert undo == {}
+
+ if revert:
+ assert undo_info == {}
+
# 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
- for txio, addr in self.batch_txio.items():
- batch.Put(txio, addr)
- # delete spent inputs
- for txi in inputs_to_read:
- batch.Delete(txi)
- batch.Put('0', self.serialize( [(block_hash, block_height, 0)] ) )
+ if not revert:
+ # add new created outputs
+ for txio, addr in self.batch_txio.items():
+ batch.Put(txio, addr)
+ # delete spent inputs
+ for txi in block_inputs:
+ batch.Delete(txi)
+ # add undo info
+ self.write_undo_info(batch, block_height, undo_info)
+ 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, self.db_version)]))
# actual write
- self.db.Write(batch, sync = sync)
+ self.db.Write(batch, sync=sync)
t3 = time.time()
- if t3 - t0 > 10 and not sync:
- print_log("block", block_height,
- "parse:%0.2f "%(t00 - t0),
- "read:%0.2f "%(t1 - t00),
- "proc:%.2f "%(t2-t1),
- "write:%.2f "%(t3-t2),
+ if t3 - t0 > 10 and not sync:
+ print_log("block", block_height,
+ "parse:%0.2f " % (t00 - t0),
+ "read:%0.2f " % (t1 - t00),
+ "proc:%.2f " % (t2-t1),
+ "write:%.2f " % (t3-t2),
"max:", max_len, max_addr)
- for addr in self.batch_list.keys(): self.invalidate_cache(addr)
-
-
+ 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',[])
+ params = request.get('params', [])
result = None
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.subscribe2':
- 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 )
+ print_log("error:", error)
- elif method == 'blockchain.address.get_history2':
+
+ elif method == 'blockchain.address.get_history':
try:
address = params[0]
- result = self.get_history( address, cache_only )
+ result = self.get_history(address, cache_only)
except BaseException, e:
error = str(e) + ': ' + address
- print_log( "error:", error )
+ print_log("error:", error)
elif method == 'blockchain.block.get_header':
- if cache_only:
+ if cache_only:
result = -1
else:
try:
height = params[0]
- result = self.get_header( height )
+ result = self.get_header(height)
except BaseException, e:
- error = str(e) + ': %d'% height
- print_log( "error:", error )
-
+ error = str(e) + ': %d' % height
+ print_log("error:", error)
+
elif method == 'blockchain.block.get_chunk':
if cache_only:
result = -1
else:
try:
index = params[0]
- result = self.get_chunk( index )
+ result = self.get_chunk(index)
except BaseException, e:
- error = str(e) + ': %d'% index
- print_log( "error:", error)
+ error = str(e) + ': %d' % index
+ print_log("error:", error)
elif method == 'blockchain.transaction.broadcast':
- txo = self.bitcoind('sendrawtransaction', params)
- print_log( "sent tx:", txo )
- result = txo
+ try:
+ txo = self.bitcoind('sendrawtransaction', params)
+ print_log("sent tx:", txo)
+ result = txo
+ except BaseException, e:
+ result = str(e) # do not send an error
+ print_log("error:", result, params)
elif method == 'blockchain.transaction.get_merkle':
if cache_only:
try:
tx_hash = params[0]
tx_height = params[1]
- result = self.get_merkle(tx_hash, tx_height)
+ result = self.get_merkle(tx_hash, tx_height)
except BaseException, e:
- error = str(e) + ': ' + tx_hash
- print_log( "error:", error )
-
+ error = str(e) + ': ' + repr(params)
+ print_log("get_merkle error:", error)
+
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) + ': ' + tx_hash
- print_log( "error:", error )
+ error = str(e) + ': ' + repr(params)
+ print_log("tx get error:", error)
else:
- error = "unknown method:%s"%method
+ error = "unknown method:%s" % method
- if cache_only and result == -1: return -1
+ if cache_only and result == -1:
+ return -1
if error:
- response = { 'id':message_id, 'error':error }
- self.push_response(response)
+ self.push_response(session, {'id': message_id, 'error': error})
elif result != '':
- response = { 'id':message_id, 'result':result }
- self.push_response(response)
+ self.push_response(session, {'id': message_id, 'result': result})
- def watch_address(self, addr):
- if addr not in self.watched_addresses:
- self.watched_addresses.append(addr)
+ 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
+ postdata = dumps(rawtxreq)
+ try:
+ respdata = urllib.urlopen(self.bitcoind_url, postdata).read()
+ except:
+ traceback.print_exc(file=sys.stdout)
+ self.shared.stop()
- def catch_up(self, sync = True):
- #
- # -------> F ------> G -------> H
- # /
- # /
- # A ------> B --------> C ------> E
- #
- # we always compare the hash in the headers file to the hash returned by bitcoind
-
-
+ 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()
while not self.shared.stopped():
-
# are we done yet?
info = self.bitcoind('getinfo')
- bitcoind_height = info.get('blocks')
- bitcoind_block_hash = self.bitcoind('getblockhash', [bitcoind_height])
- if self.last_hash == bitcoind_block_hash:
+ self.bitcoind_height = info.get('blocks')
+ bitcoind_block_hash = self.bitcoind('getblockhash', [self.bitcoind_height])
+ if self.last_hash == bitcoind_block_hash:
self.up_to_date = True
break
# 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_hash = self.bitcoind('getblockhash', [self.height + 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
- if next_block.get('previousblockhash') == self.last_hash:
+ if (next_block.get('previousblockhash') == self.last_hash) and not revert:
self.import_block(next_block, next_block_hash, self.height+1, sync)
self.height = self.height + 1
self.write_header(self.block2header(next_block), sync)
self.last_hash = next_block_hash
- if (self.height+1)%100 == 0 and not sync:
+ if self.height % 100 == 0 and not sync:
t2 = time.time()
- print_log( "catch_up: block %d (%.3fs)"%( self.height, t2 - t1 ) )
+ print_log("catch_up: block %d (%.3fs)" % (self.height, t2 - t1))
t1 = t2
-
+
else:
# revert current block
- block = self.bitcoind('getblock', [self.last_hash, 1])
- print_log( "bc2: reorg", self.height, block.get('previousblockhash'), self.last_hash )
- self.import_block(block, self.last_hash, self.height, revert=True)
+ 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.flush_headers()
- self.height = self.height -1
+ self.height -= 1
# read previous header from disk
- self.header = self.read_header(self.height)
+ self.header = self.read_header(self.height)
self.last_hash = self.hash_header(self.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: continue
+ if tx_hash in self.mempool_hashes:
+ continue
- tx = self.get_transaction(tx_hash)
- if not tx: continue
+ tx = self.get_mempool_transaction(tx_hash)
+ 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 histories
+ # rebuild mempool histories
new_mempool_hist = {}
for tx_hash, addresses in self.mempool_addresses.items():
for addr in addresses:
h = new_mempool_hist.get(addr, [])
- if tx_hash not in h:
- h.append( tx_hash )
+ if tx_hash not in h:
+ h.append(tx_hash)
new_mempool_hist[addr] = h
- 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)
-
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 self.history_cache.has_key(address):
- print_log( "cache: invalidating", address )
+ 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():
- print_log( "blockchain processor terminating" )
+ if self.shared.stopped():
+ print_log("blockchain processor terminating")
return
with self.dblock:
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 ) )
+ 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] })
- self.push_response({ 'id': None, 'method':'blockchain.address.subscribe2', '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():
+ if not self.shared.stopped():
threading.Timer(10, self.main_iteration).start()
else:
- print_log( "blockchain processor terminating" )
-
-
-
-
+ print_log("blockchain processor terminating")
git://git.novaco.in / electrum-server.git / blobdiff