URI: 
       tseparate backend - electrum - Electrum Bitcoin wallet
  HTML git clone https://git.parazyd.org/electrum
   DIR Log
   DIR Files
   DIR Refs
   DIR Submodules
       ---
   DIR commit 40f0af178b6180b0f322acf8ae8e7710e1ba7f27
   DIR parent 804c66b6205ac3dd0ae2686f61e59a84b3f68c78
  HTML Author: ThomasV <thomasv@gitorious>
       Date:   Tue, 20 Mar 2012 08:28:37 +0300
       
       separate backend
       
       Diffstat:
         A server/db.py                        |     345 +++++++++++++++++++++++++++++++
         M server/server.py                    |     342 ++-----------------------------
       
       2 files changed, 358 insertions(+), 329 deletions(-)
       ---
   DIR diff --git a/server/db.py b/server/db.py
       t@@ -0,0 +1,345 @@
       +from Abe.abe import hash_to_address, decode_check_address
       +from Abe.DataStore import DataStore as Datastore_class
       +from Abe import DataStore, readconf, BCDataStream,  deserialize, util, base58
       +
       +import psycopg2, binascii
       +
       +import thread, traceback, sys, urllib, operator
       +from json import dumps, loads
       +
       +dblock = thread.allocate_lock()
       +
       +class MyStore(Datastore_class):
       +
       +    def __init__(self,config, address_queue):
       +        conf = DataStore.CONFIG_DEFAULTS
       +        args, argv = readconf.parse_argv( [], conf)
       +        args.dbtype = config.get('database','type')
       +        if args.dbtype == 'sqlite3':
       +            args.connect_args = { 'database' : config.get('database','database') }
       +        elif args.dbtype == 'MySQLdb':
       +            args.connect_args = { 'db' : config.get('database','database'), 'user' : config.get('database','username'), 'passwd' : config.get('database','password') }
       +        elif args.dbtype == 'psycopg2':
       +            args.connect_args = { 'database' : config.get('database','database') }
       +
       +        Datastore_class.__init__(self,args)
       +
       +        self.tx_cache = {}
       +        self.mempool_keys = {}
       +        self.bitcoind_url = 'http://%s:%s@%s:%s/' % ( config.get('bitcoind','user'), config.get('bitcoind','password'), config.get('bitcoind','host'), config.get('bitcoind','port'))
       +
       +        self.address_queue = address_queue
       +
       +
       +
       +    def import_block(self, b, chain_ids=frozenset()):
       +        block_id = super(MyStore, self).import_block(b, chain_ids)
       +        #print "block", block_id
       +        for pos in xrange(len(b['transactions'])):
       +            tx = b['transactions'][pos]
       +            if 'hash' not in tx:
       +                tx['hash'] = util.double_sha256(tx['tx'])
       +            tx_id = store.tx_find_id_and_value(tx)
       +            if tx_id:
       +                self.update_tx_cache(tx_id)
       +            else:
       +                print "error: import_block: no tx_id"
       +        return block_id
       +
       +
       +    def update_tx_cache(self, txid):
       +        inrows = self.get_tx_inputs(txid, False)
       +        for row in inrows:
       +            _hash = self.binout(row[6])
       +            address = hash_to_address(chr(0), _hash)
       +            if self.tx_cache.has_key(address):
       +                print "cache: invalidating", address
       +                self.tx_cache.pop(address)
       +            self.address_queue.put(address)
       +
       +        outrows = self.get_tx_outputs(txid, False)
       +        for row in outrows:
       +            _hash = self.binout(row[6])
       +            address = hash_to_address(chr(0), _hash)
       +            if self.tx_cache.has_key(address):
       +                print "cache: invalidating", address
       +                self.tx_cache.pop(address)
       +            self.address_queue.put(address)
       +
       +    def safe_sql(self,sql, params=(), lock=True):
       +        try:
       +            if lock: dblock.acquire()
       +            ret = self.selectall(sql,params)
       +            if lock: dblock.release()
       +            return ret
       +        except:
       +            print "sql error", sql
       +            return []
       +
       +    def get_tx_outputs(self, tx_id, lock=True):
       +        return self.safe_sql("""SELECT
       +                txout.txout_pos,
       +                txout.txout_scriptPubKey,
       +                txout.txout_value,
       +                nexttx.tx_hash,
       +                nexttx.tx_id,
       +                txin.txin_pos,
       +                pubkey.pubkey_hash
       +              FROM txout
       +              LEFT JOIN txin ON (txin.txout_id = txout.txout_id)
       +              LEFT JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       +              LEFT JOIN tx nexttx ON (txin.tx_id = nexttx.tx_id)
       +             WHERE txout.tx_id = %d 
       +             ORDER BY txout.txout_pos
       +        """%(tx_id), (), lock)
       +
       +    def get_tx_inputs(self, tx_id, lock=True):
       +        return self.safe_sql(""" SELECT
       +                txin.txin_pos,
       +                txin.txin_scriptSig,
       +                txout.txout_value,
       +                COALESCE(prevtx.tx_hash, u.txout_tx_hash),
       +                prevtx.tx_id,
       +                COALESCE(txout.txout_pos, u.txout_pos),
       +                pubkey.pubkey_hash
       +              FROM txin
       +              LEFT JOIN txout ON (txout.txout_id = txin.txout_id)
       +              LEFT JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       +              LEFT JOIN tx prevtx ON (txout.tx_id = prevtx.tx_id)
       +              LEFT JOIN unlinked_txin u ON (u.txin_id = txin.txin_id)
       +             WHERE txin.tx_id = %d
       +             ORDER BY txin.txin_pos
       +             """%(tx_id,), (), lock)
       +
       +    def get_address_out_rows(self, dbhash):
       +        return self.safe_sql(""" SELECT
       +                b.block_nTime,
       +                cc.chain_id,
       +                b.block_height,
       +                1,
       +                b.block_hash,
       +                tx.tx_hash,
       +                tx.tx_id,
       +                txin.txin_pos,
       +                -prevout.txout_value
       +              FROM chain_candidate cc
       +              JOIN block b ON (b.block_id = cc.block_id)
       +              JOIN block_tx ON (block_tx.block_id = b.block_id)
       +              JOIN tx ON (tx.tx_id = block_tx.tx_id)
       +              JOIN txin ON (txin.tx_id = tx.tx_id)
       +              JOIN txout prevout ON (txin.txout_id = prevout.txout_id)
       +              JOIN pubkey ON (pubkey.pubkey_id = prevout.pubkey_id)
       +             WHERE pubkey.pubkey_hash = ?
       +               AND cc.in_longest = 1""", (dbhash,))
       +
       +    def get_address_out_rows_memorypool(self, dbhash):
       +        return self.safe_sql(""" SELECT
       +                1,
       +                tx.tx_hash,
       +                tx.tx_id,
       +                txin.txin_pos,
       +                -prevout.txout_value
       +              FROM tx 
       +              JOIN txin ON (txin.tx_id = tx.tx_id)
       +              JOIN txout prevout ON (txin.txout_id = prevout.txout_id)
       +              JOIN pubkey ON (pubkey.pubkey_id = prevout.pubkey_id)
       +             WHERE pubkey.pubkey_hash = ? """, (dbhash,))
       +
       +    def get_address_in_rows(self, dbhash):
       +        return self.safe_sql(""" SELECT
       +                b.block_nTime,
       +                cc.chain_id,
       +                b.block_height,
       +                0,
       +                b.block_hash,
       +                tx.tx_hash,
       +                tx.tx_id,
       +                txout.txout_pos,
       +                txout.txout_value
       +              FROM chain_candidate cc
       +              JOIN block b ON (b.block_id = cc.block_id)
       +              JOIN block_tx ON (block_tx.block_id = b.block_id)
       +              JOIN tx ON (tx.tx_id = block_tx.tx_id)
       +              JOIN txout ON (txout.tx_id = tx.tx_id)
       +              JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       +             WHERE pubkey.pubkey_hash = ?
       +               AND cc.in_longest = 1""", (dbhash,))
       +
       +    def get_address_in_rows_memorypool(self, dbhash):
       +        return self.safe_sql( """ SELECT
       +                0,
       +                tx.tx_hash,
       +                tx.tx_id,
       +                txout.txout_pos,
       +                txout.txout_value
       +              FROM tx
       +              JOIN txout ON (txout.tx_id = tx.tx_id)
       +              JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       +             WHERE pubkey.pubkey_hash = ? """, (dbhash,))
       +
       +    def get_history(self, addr):
       +        
       +        cached_version = self.tx_cache.get( addr )
       +        if cached_version is not None:
       +            return cached_version
       +
       +        version, binaddr = decode_check_address(addr)
       +        if binaddr is None:
       +            return None
       +
       +        dbhash = self.binin(binaddr)
       +        rows = []
       +        rows += self.get_address_out_rows( dbhash )
       +        rows += self.get_address_in_rows( dbhash )
       +
       +        txpoints = []
       +        known_tx = []
       +
       +        for row in rows:
       +            try:
       +                nTime, chain_id, height, is_in, blk_hash, tx_hash, tx_id, pos, value = row
       +            except:
       +                print "cannot unpack row", row
       +                break
       +            tx_hash = self.hashout_hex(tx_hash)
       +            txpoint = {
       +                    "nTime":    int(nTime),
       +                    "height":   int(height),
       +                    "is_in":    int(is_in),
       +                    "blk_hash": self.hashout_hex(blk_hash),
       +                    "tx_hash":  tx_hash,
       +                    "tx_id":    int(tx_id),
       +                    "pos":      int(pos),
       +                    "value":    int(value),
       +                    }
       +
       +            txpoints.append(txpoint)
       +            known_tx.append(self.hashout_hex(tx_hash))
       +
       +
       +        # todo: sort them really...
       +        txpoints = sorted(txpoints, key=operator.itemgetter("nTime"))
       +
       +        # read memory pool
       +        rows = []
       +        rows += self.get_address_in_rows_memorypool( dbhash )
       +        rows += self.get_address_out_rows_memorypool( dbhash )
       +        address_has_mempool = False
       +
       +        for row in rows:
       +            is_in, tx_hash, tx_id, pos, value = row
       +            tx_hash = self.hashout_hex(tx_hash)
       +            if tx_hash in known_tx:
       +                continue
       +
       +            # this means that pending transactions were added to the db, even if they are not returned by getmemorypool
       +            address_has_mempool = True
       +
       +            # this means pending transactions are returned by getmemorypool
       +            if tx_hash not in self.mempool_keys:
       +                continue
       +
       +            #print "mempool", tx_hash
       +            txpoint = {
       +                    "nTime":    0,
       +                    "height":   0,
       +                    "is_in":    int(is_in),
       +                    "blk_hash": 'mempool', 
       +                    "tx_hash":  tx_hash,
       +                    "tx_id":    int(tx_id),
       +                    "pos":      int(pos),
       +                    "value":    int(value),
       +                    }
       +            txpoints.append(txpoint)
       +
       +
       +        for txpoint in txpoints:
       +            tx_id = txpoint['tx_id']
       +            
       +            txinputs = []
       +            inrows = self.get_tx_inputs(tx_id)
       +            for row in inrows:
       +                _hash = self.binout(row[6])
       +                address = hash_to_address(chr(0), _hash)
       +                txinputs.append(address)
       +            txpoint['inputs'] = txinputs
       +            txoutputs = []
       +            outrows = self.get_tx_outputs(tx_id)
       +            for row in outrows:
       +                _hash = self.binout(row[6])
       +                address = hash_to_address(chr(0), _hash)
       +                txoutputs.append(address)
       +            txpoint['outputs'] = txoutputs
       +
       +            # for all unspent inputs, I want their scriptpubkey. (actually I could deduce it from the address)
       +            if not txpoint['is_in']:
       +                # detect if already redeemed...
       +                for row in outrows:
       +                    if row[6] == dbhash: break
       +                else:
       +                    raise
       +                #row = self.get_tx_output(tx_id,dbhash)
       +                # pos, script, value, o_hash, o_id, o_pos, binaddr = row
       +                # if not redeemed, we add the script
       +                if row:
       +                    if not row[4]: txpoint['raw_scriptPubKey'] = row[1]
       +
       +        # cache result
       +        if not address_has_mempool:
       +            self.tx_cache[addr] = txpoints
       +        
       +        return txpoints
       +
       +
       +
       +    def memorypool_update(store):
       +
       +        ds = BCDataStream.BCDataStream()
       +        previous_transactions = store.mempool_keys
       +        store.mempool_keys = []
       +
       +        postdata = dumps({"method": 'getmemorypool', 'params': [], 'id':'jsonrpc'})
       +
       +        respdata = urllib.urlopen(store.bitcoind_url, postdata).read()
       +        r = loads(respdata)
       +        if r['error'] != None:
       +            return
       +
       +        v = r['result'].get('transactions')
       +        for hextx in v:
       +            ds.clear()
       +            ds.write(hextx.decode('hex'))
       +            tx = deserialize.parse_Transaction(ds)
       +            tx['hash'] = util.double_sha256(tx['tx'])
       +            tx_hash = store.hashin(tx['hash'])
       +
       +            store.mempool_keys.append(tx_hash)
       +            if store.tx_find_id_and_value(tx):
       +                pass
       +            else:
       +                tx_id = store.import_tx(tx, False)
       +                store.update_tx_cache(tx_id)
       +
       +        store.commit()
       +
       +
       +    def main_iteration(store):
       +        try:
       +            dblock.acquire()
       +            store.catch_up()
       +            store.memorypool_update()
       +
       +            block_number = store.get_block_number(1)
       +
       +        except IOError:
       +            print "IOError: cannot reach bitcoind"
       +            block_number = 0
       +        except:
       +            traceback.print_exc(file=sys.stdout)
       +            block_number = 0
       +        finally:
       +            dblock.release()
       +
       +        return block_number
       +
       +
   DIR diff --git a/server/server.py b/server/server.py
       t@@ -26,11 +26,7 @@ Todo:
        
        
        import time, json, socket, operator, thread, ast, sys,re
       -import psycopg2, binascii
        
       -from Abe.abe import hash_to_address, decode_check_address
       -from Abe.DataStore import DataStore as Datastore_class
       -from Abe import DataStore, readconf, BCDataStream,  deserialize, util, base58
        
        import ConfigParser
        from json import dumps, loads
       t@@ -47,7 +43,7 @@ config = ConfigParser.ConfigParser()
        config.add_section('server')
        config.set('server','banner', 'Welcome to Electrum!')
        config.set('server', 'host', 'localhost')
       -config.set('server', 'port', 50000)
       +config.set('server', 'port', '50000')
        config.set('server', 'password', '')
        config.set('server', 'irc', 'yes')
        config.set('server', 'ircname', 'Electrum server')
       t@@ -69,8 +65,8 @@ try:
        except:
            pass
        
       +
        password = config.get('server','password')
       -bitcoind_url = 'http://%s:%s@%s:%s/' % ( config.get('bitcoind','user'), config.get('bitcoind','password'), config.get('bitcoind','host'), config.get('bitcoind','port'))
        
        stopping = False
        block_number = -1
       t@@ -80,7 +76,6 @@ sessions_sub_numblocks = {} # sessions that have subscribed to the service
        
        m_sessions = [{}] # served by http
        
       -dblock = thread.allocate_lock()
        peer_list = {}
        
        wallets = {} # for ultra-light clients such as bccapi
       t@@ -92,266 +87,6 @@ address_queue = Queue()
        
        
        
       -class MyStore(Datastore_class):
       -
       -    def import_block(self, b, chain_ids=frozenset()):
       -        block_id = super(MyStore, self).import_block(b, chain_ids)
       -        #print "block", block_id
       -        for pos in xrange(len(b['transactions'])):
       -            tx = b['transactions'][pos]
       -            if 'hash' not in tx:
       -                tx['hash'] = util.double_sha256(tx['tx'])
       -            tx_id = store.tx_find_id_and_value(tx)
       -            if tx_id:
       -                self.update_tx_cache(tx_id)
       -            else:
       -                print "error: import_block: no tx_id"
       -        return block_id
       -
       -
       -    def update_tx_cache(self, txid):
       -        inrows = self.get_tx_inputs(txid, False)
       -        for row in inrows:
       -            _hash = store.binout(row[6])
       -            address = hash_to_address(chr(0), _hash)
       -            if self.tx_cache.has_key(address):
       -                print "cache: invalidating", address
       -                self.tx_cache.pop(address)
       -            address_queue.put(address)
       -
       -        outrows = self.get_tx_outputs(txid, False)
       -        for row in outrows:
       -            _hash = store.binout(row[6])
       -            address = hash_to_address(chr(0), _hash)
       -            if self.tx_cache.has_key(address):
       -                print "cache: invalidating", address
       -                self.tx_cache.pop(address)
       -            address_queue.put(address)
       -
       -    def safe_sql(self,sql, params=(), lock=True):
       -        try:
       -            if lock: dblock.acquire()
       -            ret = self.selectall(sql,params)
       -            if lock: dblock.release()
       -            return ret
       -        except:
       -            print "sql error", sql
       -            return []
       -
       -    def get_tx_outputs(self, tx_id, lock=True):
       -        return self.safe_sql("""SELECT
       -                txout.txout_pos,
       -                txout.txout_scriptPubKey,
       -                txout.txout_value,
       -                nexttx.tx_hash,
       -                nexttx.tx_id,
       -                txin.txin_pos,
       -                pubkey.pubkey_hash
       -              FROM txout
       -              LEFT JOIN txin ON (txin.txout_id = txout.txout_id)
       -              LEFT JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       -              LEFT JOIN tx nexttx ON (txin.tx_id = nexttx.tx_id)
       -             WHERE txout.tx_id = %d 
       -             ORDER BY txout.txout_pos
       -        """%(tx_id), (), lock)
       -
       -    def get_tx_inputs(self, tx_id, lock=True):
       -        return self.safe_sql(""" SELECT
       -                txin.txin_pos,
       -                txin.txin_scriptSig,
       -                txout.txout_value,
       -                COALESCE(prevtx.tx_hash, u.txout_tx_hash),
       -                prevtx.tx_id,
       -                COALESCE(txout.txout_pos, u.txout_pos),
       -                pubkey.pubkey_hash
       -              FROM txin
       -              LEFT JOIN txout ON (txout.txout_id = txin.txout_id)
       -              LEFT JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       -              LEFT JOIN tx prevtx ON (txout.tx_id = prevtx.tx_id)
       -              LEFT JOIN unlinked_txin u ON (u.txin_id = txin.txin_id)
       -             WHERE txin.tx_id = %d
       -             ORDER BY txin.txin_pos
       -             """%(tx_id,), (), lock)
       -
       -    def get_address_out_rows(self, dbhash):
       -        return self.safe_sql(""" SELECT
       -                b.block_nTime,
       -                cc.chain_id,
       -                b.block_height,
       -                1,
       -                b.block_hash,
       -                tx.tx_hash,
       -                tx.tx_id,
       -                txin.txin_pos,
       -                -prevout.txout_value
       -              FROM chain_candidate cc
       -              JOIN block b ON (b.block_id = cc.block_id)
       -              JOIN block_tx ON (block_tx.block_id = b.block_id)
       -              JOIN tx ON (tx.tx_id = block_tx.tx_id)
       -              JOIN txin ON (txin.tx_id = tx.tx_id)
       -              JOIN txout prevout ON (txin.txout_id = prevout.txout_id)
       -              JOIN pubkey ON (pubkey.pubkey_id = prevout.pubkey_id)
       -             WHERE pubkey.pubkey_hash = ?
       -               AND cc.in_longest = 1""", (dbhash,))
       -
       -    def get_address_out_rows_memorypool(self, dbhash):
       -        return self.safe_sql(""" SELECT
       -                1,
       -                tx.tx_hash,
       -                tx.tx_id,
       -                txin.txin_pos,
       -                -prevout.txout_value
       -              FROM tx 
       -              JOIN txin ON (txin.tx_id = tx.tx_id)
       -              JOIN txout prevout ON (txin.txout_id = prevout.txout_id)
       -              JOIN pubkey ON (pubkey.pubkey_id = prevout.pubkey_id)
       -             WHERE pubkey.pubkey_hash = ? """, (dbhash,))
       -
       -    def get_address_in_rows(self, dbhash):
       -        return self.safe_sql(""" SELECT
       -                b.block_nTime,
       -                cc.chain_id,
       -                b.block_height,
       -                0,
       -                b.block_hash,
       -                tx.tx_hash,
       -                tx.tx_id,
       -                txout.txout_pos,
       -                txout.txout_value
       -              FROM chain_candidate cc
       -              JOIN block b ON (b.block_id = cc.block_id)
       -              JOIN block_tx ON (block_tx.block_id = b.block_id)
       -              JOIN tx ON (tx.tx_id = block_tx.tx_id)
       -              JOIN txout ON (txout.tx_id = tx.tx_id)
       -              JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       -             WHERE pubkey.pubkey_hash = ?
       -               AND cc.in_longest = 1""", (dbhash,))
       -
       -    def get_address_in_rows_memorypool(self, dbhash):
       -        return self.safe_sql( """ SELECT
       -                0,
       -                tx.tx_hash,
       -                tx.tx_id,
       -                txout.txout_pos,
       -                txout.txout_value
       -              FROM tx
       -              JOIN txout ON (txout.tx_id = tx.tx_id)
       -              JOIN pubkey ON (pubkey.pubkey_id = txout.pubkey_id)
       -             WHERE pubkey.pubkey_hash = ? """, (dbhash,))
       -
       -    def get_history(self, addr):
       -        
       -        cached_version = self.tx_cache.get( addr )
       -        if cached_version is not None:
       -            return cached_version
       -
       -        version, binaddr = decode_check_address(addr)
       -        if binaddr is None:
       -            return None
       -
       -        dbhash = self.binin(binaddr)
       -        rows = []
       -        rows += self.get_address_out_rows( dbhash )
       -        rows += self.get_address_in_rows( dbhash )
       -
       -        txpoints = []
       -        known_tx = []
       -
       -        for row in rows:
       -            try:
       -                nTime, chain_id, height, is_in, blk_hash, tx_hash, tx_id, pos, value = row
       -            except:
       -                print "cannot unpack row", row
       -                break
       -            tx_hash = self.hashout_hex(tx_hash)
       -            txpoint = {
       -                    "nTime":    int(nTime),
       -                    "height":   int(height),
       -                    "is_in":    int(is_in),
       -                    "blk_hash": self.hashout_hex(blk_hash),
       -                    "tx_hash":  tx_hash,
       -                    "tx_id":    int(tx_id),
       -                    "pos":      int(pos),
       -                    "value":    int(value),
       -                    }
       -
       -            txpoints.append(txpoint)
       -            known_tx.append(self.hashout_hex(tx_hash))
       -
       -
       -        # todo: sort them really...
       -        txpoints = sorted(txpoints, key=operator.itemgetter("nTime"))
       -
       -        # read memory pool
       -        rows = []
       -        rows += self.get_address_in_rows_memorypool( dbhash )
       -        rows += self.get_address_out_rows_memorypool( dbhash )
       -        address_has_mempool = False
       -
       -        for row in rows:
       -            is_in, tx_hash, tx_id, pos, value = row
       -            tx_hash = self.hashout_hex(tx_hash)
       -            if tx_hash in known_tx:
       -                continue
       -
       -            # this means that pending transactions were added to the db, even if they are not returned by getmemorypool
       -            address_has_mempool = True
       -
       -            # this means pending transactions are returned by getmemorypool
       -            if tx_hash not in self.mempool_keys:
       -                continue
       -
       -            #print "mempool", tx_hash
       -            txpoint = {
       -                    "nTime":    0,
       -                    "height":   0,
       -                    "is_in":    int(is_in),
       -                    "blk_hash": 'mempool', 
       -                    "tx_hash":  tx_hash,
       -                    "tx_id":    int(tx_id),
       -                    "pos":      int(pos),
       -                    "value":    int(value),
       -                    }
       -            txpoints.append(txpoint)
       -
       -
       -        for txpoint in txpoints:
       -            tx_id = txpoint['tx_id']
       -            
       -            txinputs = []
       -            inrows = self.get_tx_inputs(tx_id)
       -            for row in inrows:
       -                _hash = self.binout(row[6])
       -                address = hash_to_address(chr(0), _hash)
       -                txinputs.append(address)
       -            txpoint['inputs'] = txinputs
       -            txoutputs = []
       -            outrows = self.get_tx_outputs(tx_id)
       -            for row in outrows:
       -                _hash = self.binout(row[6])
       -                address = hash_to_address(chr(0), _hash)
       -                txoutputs.append(address)
       -            txpoint['outputs'] = txoutputs
       -
       -            # for all unspent inputs, I want their scriptpubkey. (actually I could deduce it from the address)
       -            if not txpoint['is_in']:
       -                # detect if already redeemed...
       -                for row in outrows:
       -                    if row[6] == dbhash: break
       -                else:
       -                    raise
       -                #row = self.get_tx_output(tx_id,dbhash)
       -                # pos, script, value, o_hash, o_id, o_pos, binaddr = row
       -                # if not redeemed, we add the script
       -                if row:
       -                    if not row[4]: txpoint['raw_scriptPubKey'] = row[1]
       -
       -        # cache result
       -        if not address_has_mempool:
       -            self.tx_cache[addr] = txpoints
       -        
       -        return txpoints
       -
        
        
        class Direct_Interface(Interface):
       t@@ -874,34 +609,6 @@ def process_output_queue():
        ####################################################################
        
        
       -def memorypool_update(store):
       -
       -    ds = BCDataStream.BCDataStream()
       -    previous_transactions = store.mempool_keys
       -    store.mempool_keys = []
       -
       -    postdata = dumps({"method": 'getmemorypool', 'params': [], 'id':'jsonrpc'})
       -    respdata = urllib.urlopen(bitcoind_url, postdata).read()
       -    r = loads(respdata)
       -    if r['error'] != None:
       -        return
       -
       -    v = r['result'].get('transactions')
       -    for hextx in v:
       -        ds.clear()
       -        ds.write(hextx.decode('hex'))
       -        tx = deserialize.parse_Transaction(ds)
       -        tx['hash'] = util.double_sha256(tx['tx'])
       -        tx_hash = store.hashin(tx['hash'])
       -
       -        store.mempool_keys.append(tx_hash)
       -        if store.tx_find_id_and_value(tx):
       -            pass
       -        else:
       -            tx_id = store.import_tx(tx, False)
       -            store.update_tx_cache(tx_id)
       -
       -    store.commit()
        
        
        def clean_session_thread():
       t@@ -1014,52 +721,30 @@ if __name__ == '__main__':
                sys.exit(0)
        
        
       -    print "starting Electrum server"
       +    # backend
       +    import db
       +    store = db.MyStore(config,address_queue)
        
       -    conf = DataStore.CONFIG_DEFAULTS
       -    args, argv = readconf.parse_argv( [], conf)
       -    args.dbtype= config.get('database','type')
       -    if args.dbtype == 'sqlite3':
       -        args.connect_args = { 'database' : config.get('database','database') }
       -    elif args.dbtype == 'MySQLdb':
       -        args.connect_args = { 'db' : config.get('database','database'), 'user' : config.get('database','username'), 'passwd' : config.get('database','password') }
       -    elif args.dbtype == 'psycopg2':
       -        args.connect_args = { 'database' : config.get('database','database') }
       -    store = MyStore(args)
       -    store.tx_cache = {}
       -    store.mempool_keys = {}
        
            # supported protocols
            thread.start_new_thread(native_server_thread, ())
            thread.start_new_thread(tcp_server_thread, ())
            thread.start_new_thread(http_server_thread, (store,))
       -
            thread.start_new_thread(clean_session_thread, ())
        
            if (config.get('server','irc') == 'yes' ):
                thread.start_new_thread(irc_thread, ())
        
       +    print "starting Electrum server"
       +
       +
            while not stopping:
       -        try:
       -            dblock.acquire()
       -            store.catch_up()
       -            memorypool_update(store)
       -
       -            block_number = store.get_block_number(1)
       -            if block_number != old_block_number:
       -                old_block_number = block_number
       -                for session_id in sessions_sub_numblocks.keys():
       -                    send_numblocks(session_id)
       -
       -        except IOError:
       -            print "IOError: cannot reach bitcoind"
       -            block_number = 0
       -        except:
       -            traceback.print_exc(file=sys.stdout)
       -            block_number = 0
       -        finally:
       -            dblock.release()
       +        block_number = store.main_iteration()
        
       +        if block_number != old_block_number:
       +            old_block_number = block_number
       +            for session_id in sessions_sub_numblocks.keys():
       +                send_numblocks(session_id)
                # do addresses
                while True:
                    try:
       t@@ -1069,6 +754,5 @@ if __name__ == '__main__':
                    do_update_address(addr)
        
                time.sleep(10)
       -
            print "server stopped"