#!/usr/bin/env python
#
# Electrum - lightweight Bitcoin client
# Copyright (C) 2011 thomasv@gitorious
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# 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 sys
import base64
import os
import re
import hashlib
import copy
import operator
import ast
import threading
import random
import aes
import Queue
import time
from util import print_msg, print_error, user_dir, format_satoshis
from bitcoin import *
from account import *
# AES encryption
EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
DecodeAES = lambda secret, e: aes.decryptData(secret, base64.b64decode(e))
def pw_encode(s, password):
if password:
secret = Hash(password)
return EncodeAES(secret, s)
else:
return s
def pw_decode(s, password):
if password is not None:
secret = Hash(password)
try:
d = DecodeAES(secret, s)
except:
raise BaseException('Invalid password')
return d
else:
return s
from version import ELECTRUM_VERSION, SEED_VERSION
class WalletStorage:
def __init__(self, config):
self.data = {}
self.file_exists = False
self.init_path(config)
print_error( "wallet path", self.path )
if self.path:
self.read(self.path)
def init_path(self, config):
"""Set the path of the wallet."""
path = config.get('wallet_path')
if not path:
path = config.get('default_wallet_path')
if path is not None:
self.path = path
return
# Look for wallet file in the default data directory.
# Make wallet directory if it does not yet exist.
if not os.path.exists(self.user_dir):
os.mkdir(self.user_dir)
self.path = os.path.join(self.user_dir, "electrum.dat")
def read(self, path):
"""Read the contents of the wallet file."""
try:
with open(self.path, "r") as f:
data = f.read()
except IOError:
return
try:
d = ast.literal_eval( data ) #parse raw data from reading wallet file
except:
raise IOError("Cannot read wallet file.")
self.data = d
self.file_exists = True
def get(self, key, default=None):
return self.data.get(key, default)
def put(self, key, value, save = True):
if self.data.get(key) is not None:
self.data[key] = value
else:
# add key to wallet config
self.data[key] = value
if save:
self.write()
def write(self):
s = repr(self.data)
f = open(self.path,"w")
f.write( s )
f.close()
if self.get('gui') != 'android':
import stat
os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE)
class Wallet:
def __init__(self, storage):
self.storage = storage
self.electrum_version = ELECTRUM_VERSION
self.gap_limit_for_change = 3 # constant
# saved fields
self.seed_version = storage.get('seed_version', SEED_VERSION)
self.gap_limit = storage.get('gap_limit', 5)
self.use_change = storage.get('use_change',True)
self.use_encryption = storage.get('use_encryption', False)
self.seed = storage.get('seed', '') # encrypted
self.labels = storage.get('labels', {})
self.frozen_addresses = storage.get('frozen_addresses',[])
self.prioritized_addresses = storage.get('prioritized_addresses',[])
self.addressbook = storage.get('contacts', [])
self.imported_keys = storage.get('imported_keys',{})
self.history = storage.get('addr_history',{}) # address -> list(txid, height)
self.fee = int(storage.get('fee_per_kb',20000))
self.master_public_keys = storage.get('master_public_keys',{})
self.master_private_keys = storage.get('master_private_keys', {})
self.first_addresses = storage.get('first_addresses',{})
#if self.seed_version != SEED_VERSION:
# raise ValueError("This wallet seed is deprecated. Please restore from seed.")
self.load_accounts()
self.transactions = {}
tx = storage.get('transactions',{})
try:
for k,v in tx.items(): self.transactions[k] = Transaction(v)
except:
print_msg("Warning: Cannot deserialize transactions. skipping")
# not saved
self.prevout_values = {} # my own transaction outputs
self.spent_outputs = []
# spv
self.verifier = None
# there is a difference between wallet.up_to_date and interface.is_up_to_date()
# interface.is_up_to_date() returns true when all requests have been answered and processed
# wallet.up_to_date is true when the wallet is synchronized (stronger requirement)
self.up_to_date = False
self.lock = threading.Lock()
self.transaction_lock = threading.Lock()
self.tx_event = threading.Event()
for tx_hash, tx in self.transactions.items():
if self.check_new_tx(tx_hash, tx):
self.update_tx_outputs(tx_hash)
else:
print_error("unreferenced tx", tx_hash)
self.transactions.pop(tx_hash)
def set_up_to_date(self,b):
with self.lock: self.up_to_date = b
def is_up_to_date(self):
with self.lock: return self.up_to_date
def update(self):
self.up_to_date = False
self.interface.poke('synchronizer')
while not self.is_up_to_date(): time.sleep(0.1)
def import_key(self, sec, password):
# check password
seed = self.decode_seed(password)
try:
address = address_from_private_key(sec)
except:
raise BaseException('Invalid private key')
if self.is_mine(address):
raise BaseException('Address already in wallet')
# store the originally requested keypair into the imported keys table
self.imported_keys[address] = pw_encode(sec, password )
self.storage.put('imported_keys', self.imported_keys, True)
return address
def delete_imported_key(self, addr):
if addr in self.imported_keys:
self.imported_keys.pop(addr)
self.storage.put('imported_keys', self.imported_keys, True)
def init_seed(self, seed):
if self.seed: raise BaseException("a seed exists")
if not seed:
seed = random_seed(128)
self.seed = seed
def save_seed(self):
self.storage.put('seed', self.seed, True)
self.storage.put('seed_version', self.seed_version, True)
master_k, master_c, master_K, master_cK = bip32_init(self.seed)
# normal accounts
k0, c0, K0, cK0 = bip32_private_derivation(master_k, master_c, "m/", "m/0'/")
# p2sh 2of2
k1, c1, K1, cK1 = bip32_private_derivation(master_k, master_c, "m/", "m/1'/")
k2, c2, K2, cK2 = bip32_private_derivation(master_k, master_c, "m/", "m/2'/")
# p2sh 2of3
k3, c3, K3, cK3 = bip32_private_derivation(master_k, master_c, "m/", "m/3'/")
k4, c4, K4, cK4 = bip32_private_derivation(master_k, master_c, "m/", "m/4'/")
k5, c5, K5, cK5 = bip32_private_derivation(master_k, master_c, "m/", "m/5'/")
self.master_public_keys = {
"m/0'/": (c0, K0, cK0),
"m/1'/": (c1, K1, cK1),
"m/2'/": (c2, K2, cK2),
"m/3'/": (c3, K3, cK3),
"m/4'/": (c4, K4, cK4),
"m/5'/": (c5, K5, cK5)
}
self.master_private_keys = {
"m/0'/": k0,
"m/1'/": k1,
"m/2'/": k2,
"m/3'/": k3,
"m/4'/": k4,
"m/5'/": k5
}
self.storage.put('master_public_keys', self.master_public_keys, True)
self.storage.put('master_private_keys', self.master_private_keys, True)
# create default account
self.create_account('1','Main account')
def find_root_by_master_key(self, c, K):
for key, v in self.master_public_keys.items():
if key == "m/":continue
cc, KK, _ = v
if (c == cc) and (K == KK):
return key
def deseed_root(self, seed, password):
# for safety, we ask the user to enter their seed
assert seed == self.decode_seed(password)
self.seed = ''
self.storage.put('seed', '', True)
def deseed_branch(self, k):
# check that parent has no seed
assert self.seed == ''
self.master_private_keys.pop(k)
self.storage.put('master_private_keys', self.master_private_keys, True)
def account_id(self, account_type, i):
if account_type == '1':
return "m/0'/%d"%i
elif account_type == '2of2':
return "m/1'/%d & m/2'/%d"%(i,i)
elif account_type == '2of3':
return "m/3'/%d & m/4'/%d & m/5'/%d"%(i,i,i)
else:
raise BaseException('unknown account type')
def num_accounts(self, account_type):
keys = self.accounts.keys()
i = 0
while True:
account_id = self.account_id(account_type, i)
if account_id not in keys: break
i += 1
return i
def new_account_address(self, account_type = '1'):
i = self.num_accounts(account_type)
k = self.account_id(account_type,i)
addr = self.first_addresses.get(k)
if not addr:
account_id, account = self.next_account(account_type)
addr = account.first_address()
self.first_addresses[k] = addr
self.storage.put('first_addresses',self.first_addresses)
return addr
def next_account(self, account_type = '1'):
i = self.num_accounts(account_type)
account_id = self.account_id(account_type,i)
if account_type is '1':
master_c0, master_K0, _ = self.master_public_keys["m/0'/"]
c0, K0, cK0 = bip32_public_derivation(master_c0.decode('hex'), master_K0.decode('hex'), "m/0'/", "m/0'/%d"%i)
account = BIP32_Account({ 'c':c0, 'K':K0, 'cK':cK0 })
elif account_type == '2of2':
master_c1, master_K1, _ = self.master_public_keys["m/1'/"]
c1, K1, cK1 = bip32_public_derivation(master_c1.decode('hex'), master_K1.decode('hex'), "m/1'/", "m/1'/%d"%i)
master_c2, master_K2, _ = self.master_public_keys["m/2'/"]
c2, K2, cK2 = bip32_public_derivation(master_c2.decode('hex'), master_K2.decode('hex'), "m/2'/", "m/2'/%d"%i)
account = BIP32_Account_2of2({ 'c':c1, 'K':K1, 'cK':cK1, 'c2':c2, 'K2':K2, 'cK2':cK2 })
elif account_type == '2of3':
master_c3, master_K3, _ = self.master_public_keys["m/3'/"]
c3, K3, cK3 = bip32_public_derivation(master_c3.decode('hex'), master_K3.decode('hex'), "m/3'/", "m/3'/%d"%i)
master_c4, master_K4, _ = self.master_public_keys["m/4'/"]
c4, K4, cK4 = bip32_public_derivation(master_c4.decode('hex'), master_K4.decode('hex'), "m/4'/", "m/4'/%d"%i)
master_c5, master_K5, _ = self.master_public_keys["m/5'/"]
c5, K5, cK5 = bip32_public_derivation(master_c5.decode('hex'), master_K5.decode('hex'), "m/5'/", "m/5'/%d"%i)
account = BIP32_Account_2of3({ 'c':c3, 'K':K3, 'cK':cK3, 'c2':c4, 'K2':K4, 'cK2':cK4, 'c3':c5, 'K3':K5, 'cK3':cK5 })
return account_id, account
def create_account(self, account_type = '1', name = None):
account_id, account = self.next_account(account_type)
self.accounts[account_id] = account
self.save_accounts()
if name:
self.labels[account_id] = name
self.storage.put('labels', self.labels, True)
def create_old_account(self):
print self.seed
mpk = OldAccount.mpk_from_seed(self.seed)
self.storage.put('master_public_key', mpk, True)
self.accounts[0] = OldAccount({'mpk':mpk, 0:[], 1:[]})
self.save_accounts()
def save_accounts(self):
d = {}
for k, v in self.accounts.items():
d[k] = v.dump()
self.storage.put('accounts', d, True)
def load_accounts(self):
d = self.storage.get('accounts', {})
self.accounts = {}
for k, v in d.items():
if k == 0:
v['mpk'] = self.storage.get('master_public_key')
self.accounts[k] = OldAccount(v)
elif '&' in k:
self.accounts[k] = BIP32_Account_2of2(v)
else:
self.accounts[k] = BIP32_Account(v)
def addresses(self, include_change = True):
o = self.get_account_addresses(-1, include_change)
for a in self.accounts.keys():
o += self.get_account_addresses(a, include_change)
o += self.first_addresses.values()
return o
def is_mine(self, address):
return address in self.addresses(True)
def is_change(self, address):
if not self.is_mine(address): return False
if address in self.imported_keys.keys(): return False
acct, s = self.get_address_index(address)
return s[0] == 1
def get_master_public_key(self):
raise
return self.storage.get("master_public_key")
def get_master_private_key(self, account, password):
master_k = pw_decode( self.master_private_keys[account], password)
master_c, master_K, master_Kc = self.master_public_keys[account]
try:
K, Kc = get_pubkeys_from_secret(master_k.decode('hex'))
assert K.encode('hex') == master_K
except:
raise BaseException("Invalid password")
return master_k
def get_address_index(self, address):
if address in self.imported_keys.keys():
return -1, None
for account in self.accounts.keys():
for for_change in [0,1]:
addresses = self.accounts[account].get_addresses(for_change)
for addr in addresses:
if address == addr:
return account, (for_change, addresses.index(addr))
raise BaseException("not found")
def rebase_sequence(self, account, sequence):
c, i = sequence
dd = []
for a in account.split('&'):
s = a.strip()
m = re.match("(m/\d+'/)(\d+)", s)
root = m.group(1)
num = int(m.group(2))
dd.append( (root, [num,c,i] ) )
return dd
def get_keyID(self, account, sequence):
rs = self.rebase_sequence(account, sequence)
dd = []
for root, public_sequence in rs:
c, K, _ = self.master_public_keys[root]
s = '/' + '/'.join( map(lambda x:str(x), public_sequence) )
dd.append( 'bip32(%s,%s,%s)'%(c,K, s) )
return '&'.join(dd)
def get_public_key(self, address):
account, sequence = self.get_address_index(address)
return self.accounts[account].get_pubkey( *sequence )
def decode_seed(self, password):
seed = pw_decode(self.seed, password)
#todo: #self.sequences[0].check_seed(seed)
return seed
def get_private_key(self, address, password):
out = []
if address in self.imported_keys.keys():
out.append( pw_decode( self.imported_keys[address], password ) )
else:
account, sequence = self.get_address_index(address)
# assert address == self.accounts[account].get_address(*sequence)
rs = self.rebase_sequence( account, sequence)
for root, public_sequence in rs:
if root not in self.master_private_keys.keys(): continue
master_k = self.get_master_private_key(root, password)
master_c, _, _ = self.master_public_keys[root]
pk = bip32_private_key( public_sequence, master_k.decode('hex'), master_c.decode('hex'))
out.append(pk)
return out
def signrawtransaction(self, tx, input_info, private_keys, password):
import deserialize
unspent_coins = self.get_unspent_coins()
seed = self.decode_seed(password)
# build a list of public/private keys
keypairs = {}
for sec in private_keys:
pubkey = public_key_from_private_key(sec)
keypairs[ pubkey ] = sec
for txin in tx.inputs:
# convert to own format
txin['tx_hash'] = txin['prevout_hash']
txin['index'] = txin['prevout_n']
for item in input_info:
if item.get('txid') == txin['tx_hash'] and item.get('vout') == txin['index']:
txin['raw_output_script'] = item['scriptPubKey']
txin['redeemScript'] = item.get('redeemScript')
txin['KeyID'] = item.get('KeyID')
break
else:
for item in unspent_coins:
if txin['tx_hash'] == item['tx_hash'] and txin['index'] == item['index']:
print_error( "tx input is in unspent coins" )
txin['raw_output_script'] = item['raw_output_script']
account, sequence = self.get_address_index(item['address'])
if account != -1:
txin['redeemScript'] = self.accounts[account].redeem_script(sequence)
break
else:
raise BaseException("Unknown transaction input. Please provide the 'input_info' parameter, or synchronize this wallet")
# if available, derive private_keys from KeyID
keyid = txin.get('KeyID')
if keyid:
roots = []
for s in keyid.split('&'):
m = re.match("bip32\(([0-9a-f]+),([0-9a-f]+),(/\d+/\d+/\d+)", s)
if not m: continue
c = m.group(1)
K = m.group(2)
sequence = m.group(3)
root = self.find_root_by_master_key(c,K)
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
pk = self.get_private_key(addr, password)
for sec in pk:
pubkey = public_key_from_private_key(sec)
keypairs[pubkey] = sec
redeem_script = txin.get("redeemScript")
print_error( "p2sh:", "yes" if redeem_script else "no")
if redeem_script:
addr = hash_160_to_bc_address(hash_160(redeem_script.decode('hex')), 5)
else:
addr = deserialize.get_address_from_output_script(txin["raw_output_script"].decode('hex'))
txin['address'] = addr
# add private keys that are in the wallet
pk = self.get_private_key(addr, password)
for sec in pk:
pubkey = public_key_from_private_key(sec)
keypairs[pubkey] = sec
if not redeem_script:
txin['redeemPubkey'] = pubkey
print txin
tx.sign( keypairs )
def sign_message(self, address, message, password):
sec = self.get_private_key(address, password)
key = regenerate_key(sec)
compressed = is_compressed(sec)
return key.sign_message(message, compressed, address)
def verify_message(self, address, signature, message):
try:
EC_KEY.verify_message(address, signature, message)
return True
except BaseException as e:
print_error("Verification error: {0}".format(e))
return False
def change_gap_limit(self, value):
if value >= self.gap_limit:
self.gap_limit = value
self.storage.put('gap_limit', self.gap_limit, True)
self.interface.poke('synchronizer')
return True
elif value >= self.min_acceptable_gap():
for key, account in self.accounts.items():
addresses = account[0]
k = self.num_unused_trailing_addresses(addresses)
n = len(addresses) - k + value
addresses = addresses[0:n]
self.accounts[key][0] = addresses
self.gap_limit = value
self.storage.put('gap_limit', self.gap_limit, True)
self.save_accounts()
return True
else:
return False
def num_unused_trailing_addresses(self, addresses):
k = 0
for a in addresses[::-1]:
if self.history.get(a):break
k = k + 1
return k
def min_acceptable_gap(self):
# fixme: this assumes wallet is synchronized
n = 0
nmax = 0
for account in self.accounts.values():
addresses = account.get_addresses(0)
k = self.num_unused_trailing_addresses(addresses)
for a in addresses[0:-k]:
if self.history.get(a):
n = 0
else:
n += 1
if n > nmax: nmax = n
return nmax + 1
def address_is_old(self, address):
age = -1
h = self.history.get(address, [])
if h == ['*']:
return True
for tx_hash, tx_height in h:
if tx_height == 0:
tx_age = 0
else:
tx_age = self.verifier.height - tx_height + 1
if tx_age > age:
age = tx_age
return age > 2
def synchronize_sequence(self, account, for_change):
limit = self.gap_limit_for_change if for_change else self.gap_limit
new_addresses = []
while True:
addresses = account.get_addresses(for_change)
if len(addresses) < limit:
address = account.create_new_address(for_change)
self.history[address] = []
new_addresses.append( address )
continue
if map( lambda a: self.address_is_old(a), addresses[-limit:] ) == limit*[False]:
break
else:
address = account.create_new_address(for_change)
self.history[address] = []
new_addresses.append( address )
return new_addresses
def create_pending_accounts(self):
for account_type in ['1','2of2','2of3']:
a = self.new_account_address(account_type)
if self.address_is_old(a):
print "creating account", a
self.create_account(account_type)
def synchronize_account(self, account):
new = []
new += self.synchronize_sequence(account, 0)
new += self.synchronize_sequence(account, 1)
return new
def synchronize(self):
if self.master_public_keys:
self.create_pending_accounts()
new = []
for account in self.accounts.values():
new += self.synchronize_account(account)
if new:
self.save_accounts()
self.storage.put('addr_history', self.history, True)
return new
def is_found(self):
return self.history.values() != [[]] * len(self.history)
def add_contact(self, address, label=None):
self.addressbook.append(address)
self.storage.put('contacts', self.addressbook, True)
if label:
self.labels[address] = label
self.storage.put('labels', self.labels, True)
def delete_contact(self, addr):
if addr in self.addressbook:
self.addressbook.remove(addr)
self.storage.put('addressbook', self.addressbook, True)
def fill_addressbook(self):
for tx_hash, tx in self.transactions.items():
is_relevant, is_send, _, _ = self.get_tx_value(tx)
if is_send:
for addr, v in tx.outputs:
if not self.is_mine(addr) and addr not in self.addressbook:
self.addressbook.append(addr)
# redo labels
# self.update_tx_labels()
def get_num_tx(self, address):
n = 0
for tx in self.transactions.values():
if address in map(lambda x:x[0], tx.outputs): n += 1
return n
def get_address_flags(self, addr):
flags = "C" if self.is_change(addr) else "I" if addr in self.imported_keys.keys() else "-"
flags += "F" if addr in self.frozen_addresses else "P" if addr in self.prioritized_addresses else "-"
return flags
def get_tx_value(self, tx, account=None):
domain = self.get_account_addresses(account)
return tx.get_value(domain, self.prevout_values)
def update_tx_outputs(self, tx_hash):
tx = self.transactions.get(tx_hash)
for i, (addr, value) in enumerate(tx.outputs):
key = tx_hash+ ':%d'%i
self.prevout_values[key] = value
for item in tx.inputs:
if self.is_mine(item.get('address')):
key = item['prevout_hash'] + ':%d'%item['prevout_n']
self.spent_outputs.append(key)
def get_addr_balance(self, address):
assert self.is_mine(address)
h = self.history.get(address,[])
if h == ['*']: return 0,0
c = u = 0
received_coins = [] # list of coins received at address
for tx_hash, tx_height in h:
tx = self.transactions.get(tx_hash)
if not tx: continue
for i, (addr, value) in enumerate(tx.outputs):
if addr == address:
key = tx_hash + ':%d'%i
received_coins.append(key)
for tx_hash, tx_height in h:
tx = self.transactions.get(tx_hash)
if not tx: continue
v = 0
for item in tx.inputs:
addr = item.get('address')
if addr == address:
key = item['prevout_hash'] + ':%d'%item['prevout_n']
value = self.prevout_values.get( key )
if key in received_coins:
v -= value
for i, (addr, value) in enumerate(tx.outputs):
key = tx_hash + ':%d'%i
if addr == address:
v += value
if tx_height:
c += v
else:
u += v
return c, u
def get_accounts(self):
accounts = {}
for k, account in self.accounts.items():
accounts[k] = self.labels.get(k, 'unnamed')
if self.imported_keys:
accounts[-1] = 'Imported keys'
return accounts
def get_account_addresses(self, a, include_change=True):
if a is None:
o = self.addresses(True)
elif a == -1:
o = self.imported_keys.keys()
else:
ac = self.accounts[a]
o = ac.get_addresses(0)
if include_change: o += ac.get_addresses(1)
return o
def get_imported_balance(self):
cc = uu = 0
for addr in self.imported_keys.keys():
c, u = self.get_addr_balance(addr)
cc += c
uu += u
return cc, uu
def get_account_balance(self, account):
if account is None:
return self.get_balance()
elif account == -1:
return self.get_imported_balance()
conf = unconf = 0
for addr in self.get_account_addresses(account):
c, u = self.get_addr_balance(addr)
conf += c
unconf += u
return conf, unconf
def get_frozen_balance(self):
conf = unconf = 0
for addr in self.frozen_addresses:
c, u = self.get_addr_balance(addr)
conf += c
unconf += u
return conf, unconf
def get_balance(self):
cc = uu = 0
for a in self.accounts.keys():
c, u = self.get_account_balance(a)
cc += c
uu += u
c, u = self.get_imported_balance()
cc += c
uu += u
return cc, uu
def get_unspent_coins(self, domain=None):
coins = []
if domain is None: domain = self.addresses(True)
for addr in domain:
h = self.history.get(addr, [])
if h == ['*']: continue
for tx_hash, tx_height in h:
tx = self.transactions.get(tx_hash)
if tx is None: raise BaseException("Wallet not synchronized")
for output in tx.d.get('outputs'):
if output.get('address') != addr: continue
key = tx_hash + ":%d" % output.get('index')
if key in self.spent_outputs: continue
output['tx_hash'] = tx_hash
coins.append(output)
return coins
def choose_tx_inputs( self, amount, fixed_fee, account = None ):
""" todo: minimize tx size """
total = 0
fee = self.fee if fixed_fee is None else fixed_fee
domain = self.get_account_addresses(account)
coins = []
prioritized_coins = []
for i in self.frozen_addresses:
if i in domain: domain.remove(i)
for i in self.prioritized_addresses:
if i in domain: domain.remove(i)
coins = self.get_unspent_coins(domain)
prioritized_coins = self.get_unspent_coins(self.prioritized_addresses)
inputs = []
coins = prioritized_coins + coins
for item in coins:
addr = item.get('address')
v = item.get('value')
total += v
inputs.append( item )
fee = self.estimated_fee(inputs) if fixed_fee is None else fixed_fee
if total >= amount + fee: break
else:
inputs = []
return inputs, total, fee
def set_fee(self, fee):
if self.fee != fee:
self.fee = fee
self.storage.put('fee_per_kb', self.fee, True)
def estimated_fee(self, inputs):
estimated_size = len(inputs) * 180 + 80 # this assumes non-compressed keys
fee = self.fee * int(round(estimated_size/1024.))
if fee == 0: fee = self.fee
return fee
def add_tx_change( self, inputs, outputs, amount, fee, total, change_addr=None, account=0 ):
"add change to a transaction"
change_amount = total - ( amount + fee )
if change_amount != 0:
if not change_addr:
if account is None:
# send change to one of the accounts involved in the tx
address = inputs[0].get('address')
account, _ = self.get_address_index(address)
if not self.use_change or account == -1:
change_addr = inputs[-1]['address']
else:
change_addr = self.accounts[account].get_addresses(1)[-self.gap_limit_for_change]
# Insert the change output at a random position in the outputs
posn = random.randint(0, len(outputs))
outputs[posn:posn] = [( change_addr, change_amount)]
return outputs
def get_history(self, address):
with self.lock:
return self.history.get(address)
def get_status(self, h):
if not h: return None
if h == ['*']: return '*'
status = ''
for tx_hash, height in h:
status += tx_hash + ':%d:' % height
return hashlib.sha256( status ).digest().encode('hex')
def receive_tx_callback(self, tx_hash, tx, tx_height):
if not self.check_new_tx(tx_hash, tx):
# may happen due to pruning
print_error("received transaction that is no longer referenced in history", tx_hash)
return
with self.transaction_lock:
self.transactions[tx_hash] = tx
self.interface.pending_transactions_for_notifications.append(tx)
self.save_transactions()
if self.verifier and tx_height>0:
self.verifier.add(tx_hash, tx_height)
self.update_tx_outputs(tx_hash)
def save_transactions(self):
tx = {}
for k,v in self.transactions.items():
tx[k] = str(v)
self.storage.put('transactions', tx, True)
def receive_history_callback(self, addr, hist):
if not self.check_new_history(addr, hist):
raise BaseException("error: received history for %s is not consistent with known transactions"%addr)
with self.lock:
self.history[addr] = hist
self.storage.put('addr_history', self.history, True)
if hist != ['*']:
for tx_hash, tx_height in hist:
if tx_height>0:
# add it in case it was previously unconfirmed
if self.verifier: self.verifier.add(tx_hash, tx_height)
def get_tx_history(self, account=None):
with self.transaction_lock:
history = self.transactions.items()
history.sort(key = lambda x: self.verifier.get_txpos(x[0]))
result = []
balance = 0
for tx_hash, tx in history:
is_relevant, is_mine, v, fee = self.get_tx_value(tx, account)
if v is not None: balance += v
c, u = self.get_account_balance(account)
if balance != c+u:
result.append( ('', 1000, 0, c+u-balance, None, c+u-balance, None ) )
balance = c + u - balance
for tx_hash, tx in history:
is_relevant, is_mine, value, fee = self.get_tx_value(tx, account)
if not is_relevant:
continue
if value is not None:
balance += value
conf, timestamp = self.verifier.get_confirmations(tx_hash) if self.verifier else (None, None)
result.append( (tx_hash, conf, is_mine, value, fee, balance, timestamp) )
return result
def get_label(self, tx_hash):
label = self.labels.get(tx_hash)
is_default = (label == '') or (label is None)
if is_default: label = self.get_default_label(tx_hash)
return label, is_default
def get_default_label(self, tx_hash):
tx = self.transactions.get(tx_hash)
default_label = ''
if tx:
is_relevant, is_mine, _, _ = self.get_tx_value(tx)
if is_mine:
for o in tx.outputs:
o_addr, _ = o
if not self.is_mine(o_addr):
try:
default_label = self.labels[o_addr]
except KeyError:
default_label = o_addr
break
else:
default_label = '(internal)'
else:
for o in tx.outputs:
o_addr, _ = o
if self.is_mine(o_addr) and not self.is_change(o_addr):
break
else:
for o in tx.outputs:
o_addr, _ = o
if self.is_mine(o_addr):
break
else:
o_addr = None
if o_addr:
dest_label = self.labels.get(o_addr)
try:
default_label = self.labels[o_addr]
except KeyError:
default_label = o_addr
return default_label
def mktx(self, outputs, password, fee=None, change_addr=None, account=None ):
for address, x in outputs:
assert is_valid(address)
amount = sum( map(lambda x:x[1], outputs) )
inputs, total, fee = self.choose_tx_inputs( amount, fee, account )
if not inputs:
raise ValueError("Not enough funds")
outputs = self.add_tx_change(inputs, outputs, amount, fee, total, change_addr, account)
tx = Transaction.from_io(inputs, outputs)
keypairs = {}
for i, txin in enumerate(tx.inputs):
address = txin['address']
account, sequence = self.get_address_index(address)
txin['KeyID'] = self.get_keyID(account, sequence)
redeemScript = self.accounts[account].redeem_script(sequence)
if redeemScript:
txin['redeemScript'] = redeemScript
else:
txin['redeemPubkey'] = self.accounts[account].get_pubkey(*sequence)
private_keys = self.get_private_key(address, password)
for sec in private_keys:
pubkey = public_key_from_private_key(sec)
keypairs[ pubkey ] = sec
tx.sign(keypairs)
for address, x in outputs:
if address not in self.addressbook and not self.is_mine(address):
self.addressbook.append(address)
return tx
def sendtx(self, tx):
# synchronous
h = self.send_tx(tx)
self.tx_event.wait()
return self.receive_tx(h)
def send_tx(self, tx):
# asynchronous
self.tx_event.clear()
self.interface.send([('blockchain.transaction.broadcast', [str(tx)])], 'synchronizer')
return tx.hash()
def receive_tx(self,tx_hash):
out = self.tx_result
if out != tx_hash:
return False, "error: " + out
return True, out
def update_password(self, seed, old_password, new_password):
if new_password == '': new_password = None
# this will throw an exception if unicode cannot be converted
self.seed = pw_encode( seed, new_password)
self.storage.put('seed', self.seed, True)
self.use_encryption = (new_password != None)
self.storage.put('use_encryption', self.use_encryption,True)
for k in self.imported_keys.keys():
a = self.imported_keys[k]
b = pw_decode(a, old_password)
c = pw_encode(b, new_password)
self.imported_keys[k] = c
self.storage.put('imported_keys', self.imported_keys, True)
for k, v in self.master_private_keys.items():
b = pw_decode(v, old_password)
c = pw_encode(b, new_password)
self.master_private_keys[k] = c
self.storage.put('master_private_keys', self.master_private_keys, True)
def freeze(self,addr):
if self.is_mine(addr) and addr not in self.frozen_addresses:
self.unprioritize(addr)
self.frozen_addresses.append(addr)
self.storage.put('frozen_addresses', self.frozen_addresses, True)
return True
else:
return False
def unfreeze(self,addr):
if self.is_mine(addr) and addr in self.frozen_addresses:
self.frozen_addresses.remove(addr)
self.storage.put('frozen_addresses', self.frozen_addresses, True)
return True
else:
return False
def prioritize(self,addr):
if self.is_mine(addr) and addr not in self.prioritized_addresses:
self.unfreeze(addr)
self.prioritized_addresses.append(addr)
self.storage.put('prioritized_addresses', self.prioritized_addresses, True)
return True
else:
return False
def unprioritize(self,addr):
if self.is_mine(addr) and addr in self.prioritized_addresses:
self.prioritized_addresses.remove(addr)
self.storage.put('prioritized_addresses', self.prioritized_addresses, True)
return True
else:
return False
def set_verifier(self, verifier):
self.verifier = verifier
# review transactions that are in the history
for addr, hist in self.history.items():
if hist == ['*']: continue
for tx_hash, tx_height in hist:
if tx_height>0:
# add it in case it was previously unconfirmed
self.verifier.add(tx_hash, tx_height)
# if we are on a pruning server, remove unverified transactions
vr = self.verifier.transactions.keys() + self.verifier.verified_tx.keys()
for tx_hash in self.transactions.keys():
if tx_hash not in vr:
self.transactions.pop(tx_hash)
def check_new_history(self, addr, hist):
# check that all tx in hist are relevant
if hist != ['*']:
for tx_hash, height in hist:
tx = self.transactions.get(tx_hash)
if not tx: continue
if not tx.has_address(addr):
return False
# check that we are not "orphaning" a transaction
old_hist = self.history.get(addr,[])
if old_hist == ['*']: return True
for tx_hash, height in old_hist:
if tx_hash in map(lambda x:x[0], hist): continue
found = False
for _addr, _hist in self.history.items():
if _addr == addr: continue
if _hist == ['*']: continue
_tx_hist = map(lambda x:x[0], _hist)
if tx_hash in _tx_hist:
found = True
break
if not found:
tx = self.transactions.get(tx_hash)
# tx might not be there
if not tx: continue
# already verified?
if self.verifier.get_height(tx_hash):
continue
# unconfirmed tx
print_error("new history is orphaning transaction:", tx_hash)
# check that all outputs are not mine, request histories
ext_requests = []
for _addr, _v in tx.outputs:
# assert not self.is_mine(_addr)
ext_requests.append( ('blockchain.address.get_history', [_addr]) )
ext_h = self.interface.synchronous_get(ext_requests)
print_error("sync:", ext_requests, ext_h)
height = None
for h in ext_h:
if h == ['*']: continue
for item in h:
if item.get('tx_hash') == tx_hash:
height = item.get('height')
if height:
print_error("found height for", tx_hash, height)
self.verifier.add(tx_hash, height)
else:
print_error("removing orphaned tx from history", tx_hash)
self.transactions.pop(tx_hash)
return True
def check_new_tx(self, tx_hash, tx):
# 1 check that tx is referenced in addr_history.
addresses = []
for addr, hist in self.history.items():
if hist == ['*']:continue
for txh, height in hist:
if txh == tx_hash:
addresses.append(addr)
if not addresses:
return False
# 2 check that referencing addresses are in the tx
for addr in addresses:
if not tx.has_address(addr):
return False
return True
def start_threads(self, interface, blockchain):
from verifier import TxVerifier
self.interface = interface
self.verifier = TxVerifier(interface, blockchain, self.storage)
self.verifier.start()
self.set_verifier(self.verifier)
self.synchronizer = WalletSynchronizer(self)
self.synchronizer.start()
def stop_threads(self):
self.verifier.stop()
self.synchronizer.stop()
class WalletSynchronizer(threading.Thread):
def __init__(self, wallet):
threading.Thread.__init__(self)
self.daemon = True
self.wallet = wallet
wallet.synchronizer = self
self.interface = self.wallet.interface
self.interface.register_channel('synchronizer')
self.wallet.interface.register_callback('connected', lambda: self.wallet.set_up_to_date(False))
self.was_updated = True
self.running = False
self.lock = threading.Lock()
def stop(self):
with self.lock: self.running = False
self.interface.poke('synchronizer')
def is_running(self):
with self.lock: return self.running
def subscribe_to_addresses(self, addresses):
messages = []
for addr in addresses:
messages.append(('blockchain.address.subscribe', [addr]))
self.interface.send( messages, 'synchronizer')
def run(self):
with self.lock: self.running = True
requested_tx = []
missing_tx = []
requested_histories = {}
# request any missing transactions
for history in self.wallet.history.values():
if history == ['*']: continue
for tx_hash, tx_height in history:
if self.wallet.transactions.get(tx_hash) is None and (tx_hash, tx_height) not in missing_tx:
missing_tx.append( (tx_hash, tx_height) )
print_error("missing tx", missing_tx)
# wait until we are connected, in case the user is not connected
while not self.interface.is_connected:
time.sleep(1)
# subscriptions
self.subscribe_to_addresses(self.wallet.addresses(True))
while self.is_running():
# 1. create new addresses
new_addresses = self.wallet.synchronize()
# request missing addresses
if new_addresses:
self.subscribe_to_addresses(new_addresses)
# request missing transactions
for tx_hash, tx_height in missing_tx:
if (tx_hash, tx_height) not in requested_tx:
self.interface.send([ ('blockchain.transaction.get',[tx_hash, tx_height]) ], 'synchronizer')
requested_tx.append( (tx_hash, tx_height) )
missing_tx = []
# detect if situation has changed
if not self.interface.is_up_to_date('synchronizer'):
if self.wallet.is_up_to_date():
self.wallet.set_up_to_date(False)
self.was_updated = True
else:
if not self.wallet.is_up_to_date():
self.wallet.set_up_to_date(True)
self.was_updated = True
if self.was_updated:
self.interface.trigger_callback('updated')
self.was_updated = False
# 2. get a response
r = self.interface.get_response('synchronizer')
# poke sends None. (needed during stop)
if not r: continue
# 3. handle response
method = r['method']
params = r['params']
result = r.get('result')
error = r.get('error')
if error:
print "error", r
continue
if method == 'blockchain.address.subscribe':
addr = params[0]
if self.wallet.get_status(self.wallet.get_history(addr)) != result:
if requested_histories.get(addr) is None:
self.interface.send([('blockchain.address.get_history', [addr])], 'synchronizer')
requested_histories[addr] = result
elif method == 'blockchain.address.get_history':
addr = params[0]
print_error("receiving history", addr, result)
if result == ['*']:
assert requested_histories.pop(addr) == '*'
self.wallet.receive_history_callback(addr, result)
else:
hist = []
# check that txids are unique
txids = []
for item in result:
tx_hash = item['tx_hash']
if tx_hash not in txids:
txids.append(tx_hash)
hist.append( (tx_hash, item['height']) )
if len(hist) != len(result):
raise BaseException("error: server sent history with non-unique txid", result)
# check that the status corresponds to what was announced
rs = requested_histories.pop(addr)
if self.wallet.get_status(hist) != rs:
raise BaseException("error: status mismatch: %s"%addr)
# store received history
self.wallet.receive_history_callback(addr, hist)
# request transactions that we don't have
for tx_hash, tx_height in hist:
if self.wallet.transactions.get(tx_hash) is None:
if (tx_hash, tx_height) not in requested_tx and (tx_hash, tx_height) not in missing_tx:
missing_tx.append( (tx_hash, tx_height) )
elif method == 'blockchain.transaction.get':
tx_hash = params[0]
tx_height = params[1]
assert tx_hash == hash_encode(Hash(result.decode('hex')))
tx = Transaction(result)
self.wallet.receive_tx_callback(tx_hash, tx, tx_height)
self.was_updated = True
requested_tx.remove( (tx_hash, tx_height) )
print_error("received tx:", tx_hash, len(tx.raw))
elif method == 'blockchain.transaction.broadcast':
self.wallet.tx_result = result
self.wallet.tx_event.set()
else:
print_error("Error: Unknown message:" + method + ", " + repr(params) + ", " + repr(result) )
if self.was_updated and not requested_tx:
self.interface.trigger_callback('updated')
self.interface.trigger_callback("new_transaction") # Updated gets called too many times from other places as well; if we use that signal we get the notification three times
self.was_updated = False