X-Git-Url: https://git.novaco.in/?a=blobdiff_plain;f=backends%2Fbitcoind%2Fblockchain_processor.py;h=7891f68262726c0b7a0af151be15bbca4a2a9d73;hb=fdc576873627546b8677b7acb560918fac9cafd0;hp=7a6194a5dae148b8ac2705acdcb0716a93e4867c;hpb=24b47d820680f235aef808d18daa873dae411b09;p=electrum-server.git diff --git a/backends/bitcoind/blockchain_processor.py b/backends/bitcoind/blockchain_processor.py index 7a6194a..7891f68 100644 --- a/backends/bitcoind/blockchain_processor.py +++ b/backends/bitcoind/blockchain_processor.py @@ -6,47 +6,8 @@ from Queue import Queue import traceback, sys, os, random - -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 - - - - +from util import Hash, hash_encode, hash_decode, rev_hex, int_to_hex +from util import bc_address_to_hash_160, hash_160_to_bc_address, header_to_string, header_from_string from processor import Processor, print_log class BlockchainProcessor(Processor): @@ -174,7 +135,7 @@ class BlockchainProcessor(Processor): 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: @@ -258,7 +219,8 @@ class BlockchainProcessor(Processor): with self.dblock: try: - hist = self.deserialize(self.db.Get(addr)) + hash_160 = bc_address_to_hash_160(addr) + hist = self.deserialize(self.db.Get(hash_160)) is_known = True except: hist = [] @@ -347,16 +309,16 @@ class BlockchainProcessor(Processor): self.batch_txio[txo] = addr - def remove_from_history(self, tx_hash, tx_pos): + def remove_from_history(self, addr, 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 + if addr is None: + try: + addr = self.batch_txio[txi] + except: + raise BaseException(tx_hash, tx_pos) + serialized_hist = self.batch_list[addr] l = len(serialized_hist)/40 @@ -367,6 +329,7 @@ class BlockchainProcessor(Processor): serialized_hist = serialized_hist[0:40*i] + serialized_hist[40*(i+1):] break else: + hist = self.deserialize(serialized_hist) raise BaseException("prevout not found", addr, hist, tx_hash, tx_pos) self.batch_list[addr] = serialized_hist @@ -393,7 +356,8 @@ class BlockchainProcessor(Processor): return eval(s) def write_undo_info(self, batch, height, undo_info): - batch.Put("undo%d"%(height%100), repr(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): @@ -401,7 +365,8 @@ class BlockchainProcessor(Processor): self.batch_list = {} # address -> history self.batch_txio = {} # transaction i/o -> address - inputs_to_read = [] + block_inputs = [] + block_outputs = [] addr_to_read = [] # deserialize transactions @@ -410,21 +375,16 @@ class BlockchainProcessor(Processor): t00 = time.time() - if revert: - # read addresses of tx outputs - for tx_hash, tx in txdict.items(): - for x in tx.get('outputs'): - txo = (tx_hash + int_to_hex(x.get('index'), 4)).decode('hex') - self.batch_txio[txo] = x.get('address') - else: + + 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') - inputs_to_read.append(txi) + block_inputs.append(txi) - inputs_to_read.sort() - for txi in inputs_to_read: + block_inputs.sort() + for txi in block_inputs: try: addr = self.db.Get(txi) except: @@ -433,11 +393,17 @@ class BlockchainProcessor(Processor): 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) + # read histories of addresses for txid, tx in txdict.items(): for x in tx.get('outputs'): - addr_to_read.append(x.get('address')) + hash_160 = bc_address_to_hash_160(x.get('address')) + addr_to_read.append(hash_160) addr_to_read.sort() for addr in addr_to_read: @@ -449,28 +415,31 @@ class BlockchainProcessor(Processor): if revert: undo_info = self.get_undo_info(block_height) - print "undo", block_height, undo_info + # 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( x.get('prevout_hash'), x.get('prevout_n')) + 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 for x in tx.get('outputs'): - self.add_to_history( x.get('address'), txid, x.get('index'), block_height) + hash_160 = bc_address_to_hash_160(x.get('address')) + self.add_to_history( hash_160, txid, x.get('index'), block_height) else: for x in tx.get('outputs'): - self.remove_from_history( txid, x.get('index')) + hash_160 = bc_address_to_hash_160(x.get('address')) + self.remove_from_history( hash_160, txid, x.get('index')) i = 0 for x in tx.get('inputs'): @@ -478,10 +447,12 @@ class BlockchainProcessor(Processor): i += 1 # read the history into batch list - self.batch_list[prevout_addr] = self.db.Get(prevout_addr) + if self.batch_list.get(prevout_addr) is None: + self.batch_list[prevout_addr] = self.db.Get(prevout_addr) + # re-add them to the history self.add_to_history( prevout_addr, x.get('prevout_hash'), x.get('prevout_n'), prevout_height) - print "new hist", self.deserialize(self.batch_list[prevout_addr]) + print_log( "new hist for", hash_160_to_bc_address(prevout_addr), self.deserialize(self.batch_list[prevout_addr]) ) # write max_len = 0 @@ -496,14 +467,23 @@ class BlockchainProcessor(Processor): 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) + 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(): + batch.Put(txio, addr) + # delete spent outputs + for txo in block_outputs: + batch.Delete(txo) - # add undo info - if not revert: self.write_undo_info(batch, block_height, undo_info) # add the max batch.Put('height', self.serialize( [(block_hash, block_height, 0)] ) ) @@ -647,8 +627,8 @@ class BlockchainProcessor(Processor): # are we done yet? info = self.bitcoind('getinfo') - bitcoind_height = info.get('blocks') - bitcoind_block_hash = self.bitcoind('getblockhash', [bitcoind_height]) + 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 @@ -658,7 +638,9 @@ class BlockchainProcessor(Processor): next_block_hash = self.bitcoind('getblockhash', [self.height+1]) next_block = self.bitcoind('getblock', [next_block_hash, 1]) - revert = (random.randint(1, 1000)!=1) if self.is_test else False + # 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) and not revert: self.import_block(next_block, next_block_hash, self.height+1, sync)