URI: 
       tcompact serialized format for unsigned and partially signed transactions. - electrum - Electrum Bitcoin wallet
  HTML git clone https://git.parazyd.org/electrum
   DIR Log
   DIR Files
   DIR Refs
   DIR Submodules
       ---
   DIR commit 0636ef8b329505cfb04ef767d5e97d8637d996f9
   DIR parent 378633e6fa9a67c74462c697e20a7799106f308c
  HTML Author: ThomasV <thomasv@gitorious>
       Date:   Sat, 21 Jun 2014 21:06:09 +0200
       
       compact serialized format for unsigned and partially signed transactions.
       
       Diffstat:
         M electrum                            |       2 +-
         M gui/qt/main_window.py               |      33 ++++++++++++++++++-------------
         M gui/qt/transaction_dialog.py        |       8 +++-----
         M lib/account.py                      |      73 ++++++++++++++++++++++++++-----
         M lib/commands.py                     |       4 ++--
         M lib/transaction.py                  |     191 ++++++++++++++++++-------------
         M lib/wallet.py                       |     109 +++++++++++++------------------
         M plugins/qrscanner.py                |      10 +++++++++-
       
       8 files changed, 252 insertions(+), 178 deletions(-)
       ---
   DIR diff --git a/electrum b/electrum
       t@@ -336,7 +336,7 @@ if __name__ == '__main__':
                    args.append(prompt_password('Enter PrivateKey (will not echo):', False))
        
            elif cmd.name == 'signrawtransaction':
       -        args = [cmd, args[1], json.loads(args[2]) if len(args) > 2 else [], json.loads(args[3]) if len(args) > 3 else []]
       +        args = [cmd, args[1], json.loads(args[2]) if len(args) > 2 else [] ]
        
            elif cmd.name == 'createmultisig':
                args = [cmd, int(args[1]), json.loads(args[2])]
   DIR diff --git a/gui/qt/main_window.py b/gui/qt/main_window.py
       t@@ -1024,7 +1024,7 @@ class ElectrumWindow(QMainWindow):
                def sign_thread():
                    time.sleep(0.1)
                    keypairs = {}
       -            self.wallet.add_keypairs_from_wallet(tx, keypairs, password)
       +            self.wallet.add_keypairs(tx, keypairs, password)
                    self.wallet.sign_transaction(tx, keypairs, password)
                    return tx, fee, label
        
       t@@ -1814,7 +1814,6 @@ class ElectrumWindow(QMainWindow):
            def show_qrcode(self, data, title = _("QR code")):
                if not data: 
                    return
       -        print_error("qrcode:", data)
                d = QRDialog(data, self, title)
                d.exec_()
        
       t@@ -2046,24 +2045,29 @@ class ElectrumWindow(QMainWindow):
                "json or raw hexadecimal"
                try:
                    txt.decode('hex')
       -            tx = Transaction(txt)
       -            return tx
       -        except Exception:
       -            pass
       +            is_hex = True
       +        except:
       +            is_hex = False
       +
       +        if is_hex:
       +            try:
       +                return Transaction(txt)
       +            except:
       +                traceback.print_exc(file=sys.stdout)
       +                QMessageBox.critical(None, _("Unable to parse transaction"), _("Electrum was unable to parse your transaction"))
       +                return
        
                try:
                    tx_dict = json.loads(str(txt))
                    assert "hex" in tx_dict.keys()
                    tx = Transaction(tx_dict["hex"])
       -            if tx_dict.has_key("input_info"):
       -                input_info = json.loads(tx_dict['input_info'])
       -                tx.add_input_info(input_info)
       +            #if tx_dict.has_key("input_info"):
       +            #    input_info = json.loads(tx_dict['input_info'])
       +            #    tx.add_input_info(input_info)
                    return tx
                except Exception:
                    traceback.print_exc(file=sys.stdout)
       -            pass
       -
       -        QMessageBox.critical(None, _("Unable to parse transaction"), _("Electrum was unable to parse your transaction"))
       +            QMessageBox.critical(None, _("Unable to parse transaction"), _("Electrum was unable to parse your transaction"))
        
        
        
       t@@ -2081,10 +2085,11 @@ class ElectrumWindow(QMainWindow):
        
        
            @protected
       -    def sign_raw_transaction(self, tx, input_info, password):
       +    def sign_raw_transaction(self, tx, password):
                try:
       -            self.wallet.signrawtransaction(tx, input_info, [], password)
       +            self.wallet.signrawtransaction(tx, [], password)
                except Exception as e:
       +            traceback.print_exc(file=sys.stdout)
                    QMessageBox.warning(self, _("Error"), str(e))
        
            def do_process_from_text(self):
   DIR diff --git a/gui/qt/transaction_dialog.py b/gui/qt/transaction_dialog.py
       t@@ -105,17 +105,15 @@ class TxDialog(QDialog):
        
        
            def show_qr(self):
       +        text = self.tx.raw.decode('hex')
                try:
       -            json_text = json.dumps(self.tx.as_dict()).replace(' ', '')
       -            self.parent.show_qrcode(json_text, 'Transaction')
       +            self.parent.show_qrcode(text, 'Transaction')
                except Exception as e:
                    self.show_message(str(e))
        
        
            def sign(self):
       -        tx_dict = self.tx.as_dict()
       -        input_info = json.loads(tx_dict["input_info"])
       -        self.parent.sign_raw_transaction(self.tx, input_info)
       +        self.parent.sign_raw_transaction(self.tx)
                self.update()
        
        
   DIR diff --git a/lib/account.py b/lib/account.py
       t@@ -16,10 +16,11 @@
        # You should have received a copy of the GNU General Public License
        # along with this program. If not, see <http://www.gnu.org/licenses/>.
        
       +import bitcoin
        from bitcoin import *
        from i18n import _
       -from transaction import Transaction
       -
       +from transaction import Transaction, is_extended_pubkey
       +from util import print_msg
        
        
        class Account(object):
       t@@ -38,7 +39,7 @@ class Account(object):
                n = len(addresses)
                address = self.get_address( for_change, n)
                addresses.append(address)
       -        print address
       +        print_msg(address)
                return address
        
            def get_address(self, for_change, n):
       t@@ -149,26 +150,30 @@ class OldAccount(Account):
                    seed = hashlib.sha256(seed + oldseed).digest()
                return string_to_number( seed )
        
       -    def get_sequence(self, for_change, n):
       -        return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.mpk ) )
       +    @classmethod
       +    def get_sequence(self, mpk, for_change, n):
       +        return string_to_number( Hash( "%d:%d:"%(n,for_change) + mpk ) )
        
            def get_address(self, for_change, n):
                pubkey = self.get_pubkey(for_change, n)
                address = public_key_to_bc_address( pubkey.decode('hex') )
                return address
        
       -    def get_pubkey(self, for_change, n):
       +    @classmethod
       +    def get_pubkey_from_mpk(self, mpk, for_change, n):
                curve = SECP256k1
       -        mpk = self.mpk
       -        z = self.get_sequence(for_change, n)
       +        z = self.get_sequence(mpk, for_change, n)
                master_public_key = ecdsa.VerifyingKey.from_string( mpk, curve = SECP256k1 )
                pubkey_point = master_public_key.pubkey.point + z*curve.generator
                public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 )
                return '04' + public_key2.to_string().encode('hex')
        
       +    def get_pubkey(self, for_change, n):
       +        return self.get_pubkey_from_mpk(self.mpk, for_change, n)
       +
            def get_private_key_from_stretched_exponent(self, for_change, n, secexp):
                order = generator_secp256k1.order()
       -        secexp = ( secexp + self.get_sequence(for_change, n) ) % order
       +        secexp = ( secexp + self.get_sequence(self.mpk, for_change, n) ) % order
                pk = number_to_string( secexp, generator_secp256k1.order() )
                compressed = False
                return SecretToASecret( pk, compressed )
       t@@ -206,6 +211,25 @@ class OldAccount(Account):
                a, b = sequence
                return 'old(%s,%d,%d)'%(self.mpk.encode('hex'),a,b)
        
       +    def get_xpubkeys(self, sequence):
       +        s = ''.join(map(lambda x: bitcoin.int_to_hex(x,2), sequence))
       +        mpk = self.mpk.encode('hex')
       +        x_pubkey = 'fe' + mpk + s
       +        return [ x_pubkey ]
       +
       +    @classmethod
       +    def parse_xpubkey(self, x_pubkey):
       +        assert is_extended_pubkey(x_pubkey)
       +        pk = x_pubkey[2:]
       +        mpk = pk[0:128]
       +        dd = pk[128:]
       +        s = []
       +        while dd:
       +            n = int(bitcoin.rev_hex(dd[0:4]), 16)
       +            dd = dd[4:]
       +            s.append(n)
       +        assert len(s) == 2
       +        return mpk, s
        
        
        class BIP32_Account(Account):
       t@@ -230,6 +254,7 @@ class BIP32_Account(Account):
            def get_master_pubkeys(self):
                return [self.xpub]
        
       +    @classmethod
            def get_pubkey_from_x(self, xpub, for_change, n):
                _, _, _, c, cK = deserialize_xkey(xpub)
                for i in [for_change, n]:
       t@@ -264,9 +289,33 @@ class BIP32_Account(Account):
            def get_type(self):
                return _('Standard 1 of 1')
        
       -    def get_keyID(self, sequence):
       -        s = '/' + '/'.join( map(lambda x:str(x), sequence) )
       -        return '&'.join( map(lambda x: 'bip32(%s,%s)'%(x, s), self.get_master_pubkeys() ) )
       +    def get_xpubkeys(self, sequence):
       +        s = ''.join(map(lambda x: bitcoin.int_to_hex(x,2), sequence))
       +        mpks = self.get_master_pubkeys()
       +        out = []
       +        for xpub in mpks:
       +            pubkey = self.get_pubkey_from_x(xpub, *sequence)
       +            x_pubkey = 'ff' + bitcoin.DecodeBase58Check(xpub).encode('hex') + s
       +            out.append( (pubkey, x_pubkey ) )
       +        # sort it, so that x_pubkeys are in the same order as pubkeys
       +        out.sort()
       +        return map(lambda x:x[1], out )
       +
       +    @classmethod
       +    def parse_xpubkey(self, pubkey):
       +        assert is_extended_pubkey(pubkey)
       +        pk = pubkey.decode('hex')
       +        pk = pk[1:]
       +        xkey = bitcoin.EncodeBase58Check(pk[0:78])
       +        dd = pk[78:]
       +        s = []
       +        while dd:
       +            n = int( bitcoin.rev_hex(dd[0:2].encode('hex')), 16)
       +            dd = dd[2:]
       +            s.append(n)
       +        assert len(s) == 2
       +        return xkey, s
       +
        
            def get_name(self, k):
                name = "Unnamed account"
   DIR diff --git a/lib/commands.py b/lib/commands.py
       t@@ -170,9 +170,9 @@ class Commands:
                return tx
        
        
       -    def signrawtransaction(self, raw_tx, input_info, private_keys):
       +    def signrawtransaction(self, raw_tx, private_keys):
                tx = Transaction(raw_tx)
       -        self.wallet.signrawtransaction(tx, input_info, private_keys, self.password)
       +        self.wallet.signrawtransaction(tx, private_keys, self.password)
                return tx
        
            def decoderawtransaction(self, raw):
   DIR diff --git a/lib/transaction.py b/lib/transaction.py
       t@@ -20,6 +20,7 @@
        # Note: The deserialization code originally comes from ABE.
        
        
       +import bitcoin
        from bitcoin import *
        from util import print_error
        import time
       t@@ -295,6 +296,33 @@ def match_decoded(decoded, to_match):
                    return False
            return True
        
       +
       +def parse_sig(x_sig):
       +    s = []
       +    for sig in x_sig:
       +        if sig[-2:] == '01':
       +            s.append(sig[:-2])
       +        else:
       +            assert sig == 'ff'
       +    return s
       +
       +def is_extended_pubkey(x_pubkey):
       +    return x_pubkey[0:2] in ['fe', 'ff']
       +
       +def parse_xpub(x_pubkey):
       +    if x_pubkey[0:2] == 'ff':
       +        from account import BIP32_Account
       +        xpub, s = BIP32_Account.parse_xpubkey(x_pubkey)
       +        pubkey = BIP32_Account.get_pubkey_from_x(xpub, s[0], s[1])
       +    elif x_pubkey[0:2] == 'fe':
       +        from account import OldAccount
       +        mpk, s = OldAccount.parse_xpubkey(x_pubkey)
       +        pubkey = OldAccount.get_pubkey_from_mpk(mpk.decode('hex'), s[0], s[1])
       +    else:
       +        pubkey = x_pubkey
       +    return pubkey
       +
       +
        def parse_scriptSig(d, bytes):
            try:
                decoded = [ x for x in script_GetOp(bytes) ]
       t@@ -314,41 +342,52 @@ def parse_scriptSig(d, bytes):
            match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
            if match_decoded(decoded, match):
                sig = decoded[0][1].encode('hex')
       -        pubkey = decoded[1][1].encode('hex')
       -        if sig[-2:] == '01':
       -            sig = sig[:-2]
       -            d['pubkeys'] = [pubkey]
       -            d['signatures'] = {pubkey:sig}
       -            d['address'] = public_key_to_bc_address(pubkey.decode('hex'))
       -            return 
       -        else:
       +        x_pubkey = decoded[1][1].encode('hex')
       +        try:
       +            signatures = parse_sig([sig])
       +            pubkey = parse_xpub(x_pubkey)
       +        except:
       +            import traceback
       +            traceback.print_exc(file=sys.stdout)
                    print_error("cannot find address in input script", bytes.encode('hex'))
                    return
       +        d['signatures'] = signatures
       +        d['x_pubkeys'] = [x_pubkey]
       +        d['num_sig'] = 1
       +        d['pubkeys'] = [pubkey]
       +        d['address'] = public_key_to_bc_address(pubkey.decode('hex'))
       +        return
        
            # p2sh transaction, 2 of n
            match = [ opcodes.OP_0 ]
            while len(match) < len(decoded):
                match.append(opcodes.OP_PUSHDATA4)
        
       -    if match_decoded(decoded, match):
       -        redeemScript = decoded[-1][1]
       -        num = len(match) - 2
       -        d['signatures'] = map(lambda x:x[1][:-1].encode('hex'), decoded[1:-1])
       -        d['address'] = hash_160_to_bc_address(hash_160(redeemScript), 5)
       -        d['redeemScript'] = redeemScript.encode('hex')
       -        dec2 = [ x for x in script_GetOp(redeemScript) ]
       -        match_2of2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
       -        match_2of3 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
       -        if match_decoded(dec2, match_2of2):
       -            pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex') ]
       -        elif match_decoded(dec2, match_2of3):
       -            pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex'), dec2[3][1].encode('hex') ]
       -        else:
       -            return
       -        d['pubkeys'] = pubkeys
       +    if not match_decoded(decoded, match):
       +        print_error("cannot find address in input script", bytes.encode('hex'))
                return
        
       -    print_error("cannot find address in input script", bytes.encode('hex'))
       +    x_sig = map(lambda x:x[1].encode('hex'), decoded[1:-1])
       +    d['signatures'] = parse_sig(x_sig)
       +    d['num_sig'] = 2
       +
       +    dec2 = [ x for x in script_GetOp(decoded[-1][1]) ]
       +    match_2of2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
       +    match_2of3 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
       +    if match_decoded(dec2, match_2of2):
       +        x_pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex') ]
       +    elif match_decoded(dec2, match_2of3):
       +        x_pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex'), dec2[3][1].encode('hex') ]
       +    else:
       +        print_error("cannot find address in input script", bytes.encode('hex'))
       +        return
       +
       +    d['x_pubkeys'] = x_pubkeys
       +    pubkeys = map(parse_xpub, x_pubkeys)
       +    d['pubkeys'] = pubkeys
       +    redeemScript = Transaction.multisig_script(pubkeys,2)
       +    d['redeemScript'] = redeemScript
       +    d['address'] = hash_160_to_bc_address(hash_160(redeemScript.decode('hex')), 5)
        
        
        
       t@@ -437,7 +476,7 @@ class Transaction:
                    raise
            
                for k in public_keys:
       -            s += var_int(len(k)/2)
       +            s += op_push(len(k)/2)
                    s += k
                if n==2:
                    s += '52'
       t@@ -471,43 +510,50 @@ class Transaction:
            @classmethod
            def serialize( klass, inputs, outputs, for_sig = None ):
        
       +        NO_SIGNATURE = 'ff'
       +
                push_script = lambda x: op_push(len(x)/2) + x
                s  = int_to_hex(1,4)                                         # version
                s += var_int( len(inputs) )                                  # number of inputs
                for i in range(len(inputs)):
                    txin = inputs[i]
       +
                    s += txin['prevout_hash'].decode('hex')[::-1].encode('hex')   # prev hash
                    s += int_to_hex(txin['prevout_n'],4)                          # prev index
        
       -            signatures = txin.get('signatures', {})
       -            if for_sig is None and not signatures:
       -                script = ''
       +            p2sh = txin.get('redeemScript') is not None
       +            n_sig = 2 if p2sh else 1
       +
       +            pubkeys = txin['pubkeys'] # pubkeys should always be known
       +            address = txin['address']
       +
       +            if for_sig is None:
        
       -            elif for_sig is None:
       -                pubkeys = txin['pubkeys']
       -                sig_list = ''
       -                for pubkey in pubkeys:
       -                    sig = signatures.get(pubkey)
       -                    if not sig: 
       -                        continue
       -                    sig = sig + '01'
       -                    sig_list += push_script(sig)
       -
       -                if not txin.get('redeemScript'):
       +                # list of signatures
       +                signatures = txin.get('signatures',[])
       +                sig_list = []
       +                for signature in signatures:
       +                    sig_list.append(signature + '01')
       +                if len(sig_list) > n_sig:
       +                    sig_list = sig_list[:n_sig]
       +                while len(sig_list) < n_sig:
       +                    sig_list.append(NO_SIGNATURE)
       +                sig_list = ''.join( map( lambda x: push_script(x), sig_list))
       +
       +                # extended pubkeys (with bip32 derivation)
       +                x_pubkeys = txin['x_pubkeys']
       +
       +                if not p2sh:
                            script = sig_list
       -                    script += push_script(pubkeys[0])
       +                    script += push_script(x_pubkeys[0])
                        else:
                            script = '00'                                    # op_0
                            script += sig_list
       -                    redeem_script = klass.multisig_script(pubkeys,2)
       -                    assert redeem_script == txin.get('redeemScript')
       +                    redeem_script = klass.multisig_script(x_pubkeys,2)
                            script += push_script(redeem_script)
        
                    elif for_sig==i:
       -                if txin.get('redeemScript'):
       -                    script = txin['redeemScript']                    # p2sh uses the inner script
       -                else:
       -                    script = txin['scriptPubKey']                    # scriptsig
       +                script = txin['redeemScript'] if p2sh else klass.pay_script(address)
                    else:
                        script = ''
                    s += var_int( len(script)/2 )                            # script length
       t@@ -536,20 +582,26 @@ class Transaction:
        
            def add_signature(self, i, pubkey, sig):
                txin = self.inputs[i]
       -        signatures = txin.get("signatures",{})
       -        signatures[pubkey] = sig
       +        signatures = txin.get("signatures",[])
       +        if sig not in signatures:
       +            signatures.append(sig)
                txin["signatures"] = signatures
                self.inputs[i] = txin
                print_error("adding signature for", pubkey)
       +        # replace x_pubkey
       +        i = txin['pubkeys'].index(pubkey)
       +        txin['x_pubkeys'][i] = pubkey
       +
                self.raw = self.serialize( self.inputs, self.outputs )
        
        
            def is_complete(self):
                for i, txin in enumerate(self.inputs):
       -            redeem_script = txin.get('redeemScript')
       -            num, redeem_pubkeys = parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
       +            #redeem_script = txin.get('redeemScript')
       +            #num, redeem_pubkeys = parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
       +            pubkeys = txin['pubkeys']
                    signatures = txin.get("signatures",{})
       -            if len(signatures) == num:
       +            if len(signatures) == txin['num_sig']:
                        continue
                    else:
                        return False
       t@@ -563,11 +615,14 @@ class Transaction:
                for i, txin in enumerate(self.inputs):
        
                    # if the input is multisig, parse redeem script
       -            redeem_script = txin.get('redeemScript')
       -            num, redeem_pubkeys = parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
       +            #redeem_script = txin.get('redeemScript')
       +            #num, redeem_pubkeys = parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
       +            redeem_pubkeys = txin['pubkeys']
       +            num = len(redeem_pubkeys)
        
                    # add pubkeys
       -            txin["pubkeys"] = redeem_pubkeys
       +            ### txin["pubkeys"] = redeem_pubkeys
       +
                    # get list of already existing signatures
                    signatures = txin.get("signatures",{})
                    # continue if this txin is complete
       t@@ -724,30 +779,12 @@ class Transaction:
                return is_relevant, is_send, v, fee
        
        
       -    def get_input_info(self):
       -        keys = ['prevout_hash', 'prevout_n', 'address', 'KeyID', 'scriptPubKey', 'redeemScript', 'redeemPubkey', 'pubkeys', 'signatures', 'is_coinbase']
       -        info = []
       -        for i in self.inputs:
       -            item = {}
       -            for k in keys:
       -                v = i.get(k)
       -                if v is not None:
       -                    item[k] = v
       -            info.append(item)
       -        return info
       -
       -
            def as_dict(self):
                import json
                out = {
                    "hex":self.raw,
                    "complete":self.is_complete()
                    }
       -
       -        if not self.is_complete():
       -            input_info = self.get_input_info()
       -            out['input_info'] = json.dumps(input_info).replace(' ','')
       -
                return out
        
        
       t@@ -772,11 +809,3 @@ class Transaction:
        
        
        
       -    def add_input_info(self, input_info):
       -        for i, txin in enumerate(self.inputs):
       -            item = input_info[i]
       -            txin['scriptPubKey'] = item['scriptPubKey']
       -            txin['redeemScript'] = item.get('redeemScript')
       -            txin['redeemPubkey'] = item.get('redeemPubkey')
       -            txin['KeyID'] = item.get('KeyID')
       -            txin['signatures'] = item.get('signatures',{})
   DIR diff --git a/lib/wallet.py b/lib/wallet.py
       t@@ -34,7 +34,7 @@ import math
        from util import print_msg, print_error, format_satoshis
        from bitcoin import *
        from account import *
       -from transaction import Transaction
       +from transaction import Transaction, is_extended_pubkey
        from plugins import run_hook
        import bitcoin
        from synchronizer import WalletSynchronizer
       t@@ -392,73 +392,56 @@ class Abstract_Wallet:
                return self.accounts[account_id].get_pubkeys(sequence)
        
        
       -    def add_keypairs_from_wallet(self, tx, keypairs, password):
       +    def add_keypairs(self, tx, keypairs, password):
       +        # first check the provided password
       +        seed = self.get_seed(password)
       +
                for txin in tx.inputs:
       +            x_pubkeys = txin['x_pubkeys']
                    address = txin['address']
       -            if not self.is_mine(address):
       -                continue
       -            private_keys = self.get_private_key(address, password)
       -            for sec in private_keys:
       -                pubkey = public_key_from_private_key(sec)
       -                keypairs[ pubkey ] = sec
        
       +            if self.is_mine(address):
        
       +                private_keys = self.get_private_key(address, password)
       +                for sec in private_keys:
       +                    pubkey = public_key_from_private_key(sec)
       +                    keypairs[ pubkey ] = sec
        
       -    def add_keypairs_from_KeyID(self, tx, keypairs, password):
       -        # first check the provided password
       -        seed = self.get_seed(password)
       +            else:
        
       -        for txin in tx.inputs:
       -            keyid = txin.get('KeyID')
       -            if keyid:
       -                roots = []
       -                for s in keyid.split('&'):
       -                    m = re.match("bip32\((.*),(/\d+/\d+)\)", s)
       -                    if not m: continue
       -                    xpub = m.group(1)
       -                    sequence = m.group(2)
       -                    root = self.find_root_by_master_key(xpub)
       -                    if not root: continue
       -                    sequence = map(lambda x:int(x), sequence.strip('/').split('/'))
       -                    root = root + '%d'%sequence[0]
       -                    sequence = sequence[1:]
       -                    roots.append((root,sequence)) 
       -
       -                account_id = " & ".join( map(lambda x:x[0], roots) )
       -                account = self.accounts.get(account_id)
       -                if not account: continue
       -                addr = account.get_address(*sequence)
       -                txin['address'] = addr # fixme: side effect
       -                pk = self.get_private_key(addr, password)
       -                for sec in pk:
       -                    pubkey = public_key_from_private_key(sec)
       -                    keypairs[pubkey] = sec
       +                from account import BIP32_Account
       +                print "scanning", x_pubkeys
        
       +                for x_pubkey in x_pubkeys:
       +                    if not is_extended_pubkey(x_pubkey):
       +                        continue
        
       +                    xpub, sequence = BIP32_Account.parse_xpubkey(x_pubkey)
       +                    print "xpub", xpub
        
       -    def signrawtransaction(self, tx, input_info, private_keys, password):
       +                    # look for account that can sign
       +                    for k, account in self.accounts.items():
       +                        if xpub in account.get_master_pubkeys():
       +                            break
       +                    else:
       +                        continue
       +                    print "found xpub", xpub, sequence
       +
       +                    addr = account.get_address(*sequence)
       +                    print addr, txin['address']
       +                    assert txin['address'] == addr
       +                    pk = self.get_private_key(addr, password)
       +                    for sec in pk:
       +                        pubkey = public_key_from_private_key(sec)
       +                        keypairs[pubkey] = sec
        
       -        # check that the password is correct
       -        seed = self.get_seed(password)
        
       -        # if input_info is not known, build it using wallet UTXOs
       -        if not input_info:
       -            input_info = []
       -            unspent_coins = self.get_unspent_coins()
       -            for txin in tx.inputs:
       -                for item in unspent_coins:
       -                    if txin['prevout_hash'] == item['prevout_hash'] and txin['prevout_n'] == item['prevout_n']:
       -                        info = { 'address':item['address'], 'scriptPubKey':item['scriptPubKey'] }
       -                        self.add_input_info(info)
       -                        input_info.append(info)
       -                        break
       -                else:
       -                    print_error( "input not in UTXOs" )
       -                    input_info.append(None)
        
       -        # add input_info to the transaction
       -        print_error("input_info", input_info)
       -        tx.add_input_info(input_info)
       +
       +    def signrawtransaction(self, tx, private_keys, password):
       +
       +        # check that the password is correct
       +        seed = self.get_seed(password)
        
                # build a list of public/private keys
                keypairs = {}
       t@@ -468,10 +451,9 @@ class Abstract_Wallet:
                    pubkey = public_key_from_private_key(sec)
                    keypairs[ pubkey ] = sec
        
       -        # add private_keys from KeyID
       -        self.add_keypairs_from_KeyID(tx, keypairs, password)
       -        # add private keys from wallet
       -        self.add_keypairs_from_wallet(tx, keypairs, password)
       +        # add private_keys
       +        self.add_keypairs(tx, keypairs, password)
       +
                # sign the transaction
                self.sign_transaction(tx, keypairs, password)
        
       t@@ -869,7 +851,7 @@ class Abstract_Wallet:
            def mktx(self, outputs, password, fee=None, change_addr=None, domain= None, coins = None ):
                tx = self.make_unsigned_transaction(outputs, fee, change_addr, domain, coins)
                keypairs = {}
       -        self.add_keypairs_from_wallet(tx, keypairs, password)
       +        self.add_keypairs(tx, keypairs, password)
                if keypairs:
                    self.sign_transaction(tx, keypairs, password)
                return tx
       t@@ -879,12 +861,15 @@ class Abstract_Wallet:
                address = txin['address']
                account_id, sequence = self.get_address_index(address)
                account = self.accounts[account_id]
       -        txin['KeyID'] = account.get_keyID(sequence)
                redeemScript = account.redeem_script(sequence)
       +        txin['x_pubkeys'] = account.get_xpubkeys(sequence)
       +        txin['pubkeys'] = account.get_pubkeys(sequence) 
                if redeemScript: 
                    txin['redeemScript'] = redeemScript
       +            txin['num_sig'] = 2
                else:
                    txin['redeemPubkey'] = account.get_pubkey(*sequence)
       +            txin['num_sig'] = 1
        
        
            def sign_transaction(self, tx, keypairs, password):
   DIR diff --git a/plugins/qrscanner.py b/plugins/qrscanner.py
       t@@ -82,7 +82,15 @@ class Plugin(BasePlugin):
                qrcode = self.scan_qr()
                if not qrcode:
                    return
       -        tx = self.win.tx_from_text(qrcode)
       +        data = qrcode
       +
       +        # transactions are binary, but qrcode seems to return utf8...
       +        z = data.decode('utf8')
       +        s = ''
       +        for b in z:
       +            s += chr(ord(b))
       +        data = s.encode('hex')
       +        tx = self.win.tx_from_text(data)
                if not tx:
                    return
                self.win.show_transaction(tx)