#!/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 . import sys import base64 import os import re import hashlib import copy import operator import ast import threading import random import getpass import aes import ecdsa from ecdsa.util import string_to_number, number_to_string from util import print_error ############ functions from pywallet ##################### addrtype = 0 def hash_160(public_key): try: md = hashlib.new('ripemd160') md.update(hashlib.sha256(public_key).digest()) return md.digest() except: import ripemd md = ripemd.new(hashlib.sha256(public_key).digest()) return md.digest() def public_key_to_bc_address(public_key): h160 = hash_160(public_key) return hash_160_to_bc_address(h160) def hash_160_to_bc_address(h160): vh160 = chr(addrtype) + h160 h = Hash(vh160) addr = vh160 + h[0:4] return b58encode(addr) def bc_address_to_hash_160(addr): bytes = b58decode(addr, 25) return bytes[1:21] def encode_point(pubkey, compressed=False): order = generator_secp256k1.order() p = pubkey.pubkey.point x_str = ecdsa.util.number_to_string(p.x(), order) y_str = ecdsa.util.number_to_string(p.y(), order) if compressed: return chr(2 + (p.y() & 1)) + x_str else: return chr(4) + pubkey.to_string() #x_str + y_str __b58chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz' __b58base = len(__b58chars) def b58encode(v): """ encode v, which is a string of bytes, to base58.""" long_value = 0L for (i, c) in enumerate(v[::-1]): long_value += (256**i) * ord(c) result = '' while long_value >= __b58base: div, mod = divmod(long_value, __b58base) result = __b58chars[mod] + result long_value = div result = __b58chars[long_value] + result # Bitcoin does a little leading-zero-compression: # leading 0-bytes in the input become leading-1s nPad = 0 for c in v: if c == '\0': nPad += 1 else: break return (__b58chars[0]*nPad) + result def b58decode(v, length): """ decode v into a string of len bytes.""" long_value = 0L for (i, c) in enumerate(v[::-1]): long_value += __b58chars.find(c) * (__b58base**i) result = '' while long_value >= 256: div, mod = divmod(long_value, 256) result = chr(mod) + result long_value = div result = chr(long_value) + result nPad = 0 for c in v: if c == __b58chars[0]: nPad += 1 else: break result = chr(0)*nPad + result if length is not None and len(result) != length: return None return result def Hash(data): return hashlib.sha256(hashlib.sha256(data).digest()).digest() def EncodeBase58Check(vchIn): hash = Hash(vchIn) return b58encode(vchIn + hash[0:4]) def DecodeBase58Check(psz): vchRet = b58decode(psz, None) key = vchRet[0:-4] csum = vchRet[-4:] hash = Hash(key) cs32 = hash[0:4] if cs32 != csum: return None else: return key def PrivKeyToSecret(privkey): return privkey[9:9+32] def SecretToASecret(secret): vchIn = chr(addrtype+128) + secret return EncodeBase58Check(vchIn) def ASecretToSecret(key): vch = DecodeBase58Check(key) if vch and vch[0] == chr(addrtype+128): return vch[1:] else: return False ########### end pywallet functions ####################### # get password routine def prompt_password(prompt, confirm=True): if sys.stdin.isatty(): password = getpass.getpass(prompt) if password and confirm: password2 = getpass.getpass("Confirm: ") if password != password2: sys.exit("Error: Passwords do not match.") else: password = raw_input(prompt) if not password: password = None return password # URL decode _ud = re.compile('%([0-9a-hA-H]{2})', re.MULTILINE) urldecode = lambda x: _ud.sub(lambda m: chr(int(m.group(1), 16)), x) def int_to_hex(i, length=1): s = hex(i)[2:].rstrip('L') s = "0"*(2*length - len(s)) + s return s.decode('hex')[::-1].encode('hex') # AES EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s)) DecodeAES = lambda secret, e: aes.decryptData(secret, base64.b64decode(e)) # secp256k1, http://www.oid-info.com/get/1.3.132.0.10 _p = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEFFFFFC2FL _r = 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141L _b = 0x0000000000000000000000000000000000000000000000000000000000000007L _a = 0x0000000000000000000000000000000000000000000000000000000000000000L _Gx = 0x79BE667EF9DCBBAC55A06295CE870B07029BFCDB2DCE28D959F2815B16F81798L _Gy = 0x483ada7726a3c4655da4fbfc0e1108a8fd17b448a68554199c47d08ffb10d4b8L curve_secp256k1 = ecdsa.ellipticcurve.CurveFp( _p, _a, _b ) generator_secp256k1 = ecdsa.ellipticcurve.Point( curve_secp256k1, _Gx, _Gy, _r ) oid_secp256k1 = (1,3,132,0,10) SECP256k1 = ecdsa.curves.Curve("SECP256k1", curve_secp256k1, generator_secp256k1, oid_secp256k1 ) def filter(s): out = re.sub('( [^\n]*|)\n','',s) out = out.replace(' ','') out = out.replace('\n','') return out def raw_tx( inputs, outputs, for_sig = None ): s = int_to_hex(1,4) + ' version\n' s += int_to_hex( len(inputs) ) + ' number of inputs\n' for i in range(len(inputs)): _, _, p_hash, p_index, p_script, pubkey, sig = inputs[i] s += p_hash.decode('hex')[::-1].encode('hex') + ' prev hash\n' s += int_to_hex(p_index,4) + ' prev index\n' if for_sig is None: sig = sig + chr(1) # hashtype script = int_to_hex( len(sig)) + ' push %d bytes\n'%len(sig) script += sig.encode('hex') + ' sig\n' pubkey = chr(4) + pubkey script += int_to_hex( len(pubkey)) + ' push %d bytes\n'%len(pubkey) script += pubkey.encode('hex') + ' pubkey\n' elif for_sig==i: script = p_script + ' scriptsig \n' else: script='' s += int_to_hex( len(filter(script))/2 ) + ' script length \n' s += script s += "ffffffff" + ' sequence\n' s += int_to_hex( len(outputs) ) + ' number of outputs\n' for output in outputs: addr, amount = output s += int_to_hex( amount, 8) + ' amount: %d\n'%amount script = '76a9' # op_dup, op_hash_160 script += '14' # push 0x14 bytes script += bc_address_to_hash_160(addr).encode('hex') script += '88ac' # op_equalverify, op_checksig s += int_to_hex( len(filter(script))/2 ) + ' script length \n' s += script + ' script \n' s += int_to_hex(0,4) # lock time if for_sig is not None: s += int_to_hex(1, 4) # hash type return s def format_satoshis(x, is_diff=False, num_zeros = 0): from decimal import Decimal s = Decimal(x) sign, digits, exp = s.as_tuple() digits = map(str, digits) while len(digits) < 9: digits.insert(0,'0') digits.insert(-8,'.') s = ''.join(digits).rstrip('0') if sign: s = '-' + s elif is_diff: s = "+" + s p = s.find('.') s += "0"*( 1 + num_zeros - ( len(s) - p )) s += " "*( 9 - ( len(s) - p )) s = " "*( 5 - ( p )) + s return s from version import ELECTRUM_VERSION, SEED_VERSION from interface import DEFAULT_SERVERS class Wallet: def __init__(self): self.electrum_version = ELECTRUM_VERSION self.seed_version = SEED_VERSION self.update_callbacks = [] self.gap_limit = 5 # configuration self.use_change = True self.fee = 100000 self.num_zeros = 0 self.master_public_key = '' self.conversion_currency = None self.theme = None # saved fields self.use_encryption = False self.addresses = [] # receiving addresses visible for user self.change_addresses = [] # addresses used as change self.seed = '' # encrypted self.history = {} self.labels = {} # labels for addresses and transactions self.aliases = {} # aliases for addresses self.authorities = {} # trusted addresses self.frozen_addresses = [] self.prioritized_addresses = [] self.expert_mode = False self.receipts = {} # signed URIs self.receipt = None # next receipt self.addressbook = [] # outgoing addresses, for payments self.debug_server = False # write server communication debug info to stdout # not saved self.tx_history = {} self.imported_keys = {} self.remote_url = None self.was_updated = True self.blocks = -1 self.banner = '' # there is a difference between self.up_to_date and self.is_up_to_date() # self.is_up_to_date() returns true when all requests have been answered and processed # self.up_to_date is true when the wallet is synchronized (stronger requirement) self.up_to_date_event = threading.Event() self.up_to_date_event.clear() self.up_to_date = False self.lock = threading.Lock() self.tx_event = threading.Event() self.pick_random_server() def register_callback(self, update_callback): with self.lock: self.update_callbacks.append(update_callback) def trigger_callbacks(self): with self.lock: callbacks = self.update_callbacks[:] [update() for update in callbacks] def pick_random_server(self): self.server = random.choice( DEFAULT_SERVERS ) # random choice when the wallet is created def is_up_to_date(self): return self.interface.responses.empty() and not self.interface.unanswered_requests def set_server(self, server): # raise an error if the format isnt correct a,b,c = server.split(':') b = int(b) assert c in ['t','h','n'] # set the server if server != self.server: self.server = server self.save() self.interface.is_connected = False # this exits the polling loop self.interface.poke() def set_path(self, wallet_path): """Set the path of the wallet.""" if wallet_path is not None: self.path = wallet_path else: # backward compatibility: look for wallet file in the default data directory if "HOME" in os.environ: wallet_dir = os.path.join( os.environ["HOME"], '.electrum') elif "LOCALAPPDATA" in os.environ: wallet_dir = os.path.join( os.environ["LOCALAPPDATA"], 'Electrum' ) elif "APPDATA" in os.environ: wallet_dir = os.path.join( os.environ["APPDATA"], 'Electrum' ) else: raise BaseException("No home directory found in environment variables.") if not os.path.exists( wallet_dir ): os.mkdir( wallet_dir ) self.path = os.path.join( wallet_dir, 'electrum.dat' ) def import_key(self, keypair, password): address, key = keypair.split(':') if not self.is_valid(address): raise BaseException('Invalid Bitcoin address') if address in self.all_addresses(): raise BaseException('Address already in wallet') b = ASecretToSecret( key ) if not b: raise BaseException('Unsupported key format') secexp = int( b.encode('hex'), 16) private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve=SECP256k1 ) # sanity check public_key = private_key.get_verifying_key() if not address == public_key_to_bc_address( '04'.decode('hex') + public_key.to_string() ): raise BaseException('Address does not match private key') self.imported_keys[address] = self.pw_encode( key, password ) def new_seed(self, password): seed = "%032x"%ecdsa.util.randrange( pow(2,128) ) #self.init_mpk(seed) # encrypt self.seed = self.pw_encode( seed, password ) def init_mpk(self,seed): # public key curve = SECP256k1 secexp = self.stretch_key(seed) master_private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 ) self.master_public_key = master_private_key.get_verifying_key().to_string() def all_addresses(self): return self.addresses + self.change_addresses + self.imported_keys.keys() def is_mine(self, address): return address in self.all_addresses() def is_change(self, address): return address in self.change_addresses def is_valid(self,addr): ADDRESS_RE = re.compile('[1-9A-HJ-NP-Za-km-z]{26,}\\Z') if not ADDRESS_RE.match(addr): return False try: h = bc_address_to_hash_160(addr) except: return False return addr == hash_160_to_bc_address(h) def stretch_key(self,seed): oldseed = seed for i in range(100000): seed = hashlib.sha256(seed + oldseed).digest() return string_to_number( seed ) def get_sequence(self,n,for_change): return string_to_number( Hash( "%d:%d:"%(n,for_change) + self.master_public_key ) ) def get_private_key_base58(self, address, password): pk = self.get_private_key(address, password) if pk is None: return None return SecretToASecret( pk ) def get_private_key(self, address, password): """ Privatekey(type,n) = Master_private_key + H(n|S|type) """ order = generator_secp256k1.order() if address in self.imported_keys.keys(): b = self.pw_decode( self.imported_keys[address], password ) if not b: return None b = ASecretToSecret( b ) secexp = int( b.encode('hex'), 16) else: if address in self.addresses: n = self.addresses.index(address) for_change = False elif address in self.change_addresses: n = self.change_addresses.index(address) for_change = True else: raise BaseException("unknown address") try: seed = self.pw_decode( self.seed, password) except: raise BaseException("Invalid password") if not seed: return None secexp = self.stretch_key(seed) secexp = ( secexp + self.get_sequence(n,for_change) ) % order pk = number_to_string(secexp,order) return pk def msg_magic(self, message): return "\x18Bitcoin Signed Message:\n" + chr( len(message) ) + message def sign_message(self, address, message, password): private_key = ecdsa.SigningKey.from_string( self.get_private_key(address, password), curve = SECP256k1 ) public_key = private_key.get_verifying_key() signature = private_key.sign_digest( Hash( self.msg_magic( message ) ), sigencode = ecdsa.util.sigencode_string ) assert public_key.verify_digest( signature, Hash( self.msg_magic( message ) ), sigdecode = ecdsa.util.sigdecode_string) for i in range(4): sig = base64.b64encode( chr(27+i) + signature ) try: self.verify_message( address, sig, message) return sig except: continue else: raise BaseException("error: cannot sign message") def verify_message(self, address, signature, message): """ See http://www.secg.org/download/aid-780/sec1-v2.pdf for the math """ from ecdsa import numbertheory, ellipticcurve, util import msqr curve = curve_secp256k1 G = generator_secp256k1 order = G.order() # extract r,s from signature sig = base64.b64decode(signature) if len(sig) != 65: raise BaseException("Wrong encoding") r,s = util.sigdecode_string(sig[1:], order) nV = ord(sig[0]) if nV < 27 or nV >= 35: raise BaseException("Bad encoding") if nV >= 31: compressed = True nV -= 4 else: compressed = False recid = nV - 27 # 1.1 x = r + (recid/2) * order # 1.3 alpha = ( x * x * x + curve.a() * x + curve.b() ) % curve.p() beta = msqr.modular_sqrt(alpha, curve.p()) y = beta if (beta - recid) % 2 == 0 else curve.p() - beta # 1.4 the constructor checks that nR is at infinity R = ellipticcurve.Point(curve, x, y, order) # 1.5 compute e from message: h = Hash( self.msg_magic( message ) ) e = string_to_number(h) minus_e = -e % order # 1.6 compute Q = r^-1 (sR - eG) inv_r = numbertheory.inverse_mod(r,order) Q = inv_r * ( s * R + minus_e * G ) public_key = ecdsa.VerifyingKey.from_public_point( Q, curve = SECP256k1 ) # check that Q is the public key public_key.verify_digest( sig[1:], h, sigdecode = ecdsa.util.sigdecode_string) # check that we get the original signing address addr = public_key_to_bc_address( encode_point(public_key, compressed) ) if address != addr: raise BaseException("Bad signature") def create_new_address(self, for_change): """ Publickey(type,n) = Master_public_key + H(n|S|type)*point """ curve = SECP256k1 n = len(self.change_addresses) if for_change else len(self.addresses) z = self.get_sequence(n,for_change) master_public_key = ecdsa.VerifyingKey.from_string( self.master_public_key, curve = SECP256k1 ) pubkey_point = master_public_key.pubkey.point + z*curve.generator public_key2 = ecdsa.VerifyingKey.from_public_point( pubkey_point, curve = SECP256k1 ) address = public_key_to_bc_address( '04'.decode('hex') + public_key2.to_string() ) if for_change: self.change_addresses.append(address) else: self.addresses.append(address) self.history[address] = [] print address return address def change_gap_limit(self, value): if value >= self.gap_limit: self.gap_limit = value self.save() self.interface.poke() return True elif value >= self.min_acceptable_gap(): k = self.num_unused_trailing_addresses() n = len(self.addresses) - k + value self.addresses = self.addresses[0:n] self.gap_limit = value self.save() return True else: return False def num_unused_trailing_addresses(self): k = 0 for a in self.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 k = self.num_unused_trailing_addresses() for a in self.addresses[0:-k]: if self.history.get(a): n = 0 else: n += 1 if n > nmax: nmax = n return nmax + 1 def synchronize(self): if not self.master_public_key: return [] new_addresses = [] while True: if self.change_addresses == []: new_addresses.append( self.create_new_address(True) ) continue a = self.change_addresses[-1] if self.history.get(a): new_addresses.append( self.create_new_address(True) ) else: break n = self.gap_limit while True: if len(self.addresses) < n: new_addresses.append( self.create_new_address(False) ) continue if map( lambda a: self.history.get(a), self.addresses[-n:] ) == n*[[]]: break else: new_addresses.append( self.create_new_address(False) ) if self.remote_url: num = self.get_remote_number() while len(self.addresses) 1 ) or ( len(self.addresses) > self.gap_limit ) def fill_addressbook(self): for tx in self.tx_history.values(): if tx['value']<0: for i in tx['outputs']: if not self.is_mine(i) and i not in self.addressbook: self.addressbook.append(i) # redo labels self.update_tx_labels() def save(self): # TODO: Need special config storage class. Should not be mixed # up with the wallet. # Settings should maybe be stored in a flat ini file. s = { 'seed_version': self.seed_version, 'use_encryption': self.use_encryption, 'use_change': self.use_change, 'master_public_key': self.master_public_key.encode('hex'), 'fee': self.fee, 'server': self.server, 'seed': self.seed, 'addresses': self.addresses, 'change_addresses': self.change_addresses, 'history': self.history, 'labels': self.labels, 'contacts': self.addressbook, 'imported_keys': self.imported_keys, 'aliases': self.aliases, 'authorities': self.authorities, 'receipts': self.receipts, 'num_zeros': self.num_zeros, 'frozen_addresses': self.frozen_addresses, 'prioritized_addresses': self.prioritized_addresses, 'expert_mode': self.expert_mode, 'gap_limit': self.gap_limit, 'debug_server': self.debug_server, 'conversion_currency': self.conversion_currency, 'theme': self.theme } f = open(self.path,"w") f.write( repr(s) ) f.close() import stat os.chmod(self.path,stat.S_IREAD | stat.S_IWRITE) def read(self): """Read the contents of the wallet file.""" import interface self.file_exists = False try: f = open(self.path,"r") data = f.read() f.close() d = ast.literal_eval( data ) #parse raw data from reading wallet file interface.old_to_new(d) self.seed_version = d.get('seed_version') self.master_public_key = d.get('master_public_key').decode('hex') self.use_encryption = d.get('use_encryption') self.use_change = bool(d.get('use_change', True)) self.fee = int(d.get('fee')) self.seed = d.get('seed') self.server = d.get('server') self.addresses = d.get('addresses') self.change_addresses = d.get('change_addresses') self.history = d.get('history') self.labels = d.get('labels') self.addressbook = d.get('contacts') self.imported_keys = d.get('imported_keys', {}) self.aliases = d.get('aliases', {}) self.authorities = d.get('authorities', {}) self.receipts = d.get('receipts', {}) self.num_zeros = d.get('num_zeros', 0) self.frozen_addresses = d.get('frozen_addresses', []) self.prioritized_addresses = d.get('prioritized_addresses', []) self.expert_mode = d.get('expert_mode', False) self.gap_limit = d.get('gap_limit', 5) self.debug_server = d.get('debug_server', False) self.conversion_currency = d.get('conversion_currency', 'USD') self.theme = d.get('theme', 'Cleanlook') except: raise IOError("Cannot read wallet file.") self.update_tx_history() if self.seed_version != SEED_VERSION: raise ValueError("This wallet seed is deprecated. Please run upgrade.py for a diagnostic.") if self.remote_url: assert self.master_public_key.encode('hex') == self.get_remote_mpk() self.file_exists = True 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_addr_balance(self, addr): assert self.is_mine(addr) h = self.history.get(addr,[]) c = u = 0 for item in h: v = item['value'] if item['height']: c += v else: u += v return c, u def get_balance(self): conf = unconf = 0 for addr in self.all_addresses(): c, u = self.get_addr_balance(addr) conf += c unconf += u return conf, unconf def choose_tx_inputs( self, amount, fixed_fee, from_addr = None ): """ todo: minimize tx size """ total = 0 fee = self.fee if fixed_fee is None else fixed_fee coins = [] prioritized_coins = [] domain = [from_addr] if from_addr else self.all_addresses() 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) for addr in domain: h = self.history.get(addr) if h is None: continue for item in h: if item.get('raw_output_script'): coins.append( (addr,item)) coins = sorted( coins, key = lambda x: x[1]['timestamp'] ) for addr in self.prioritized_addresses: h = self.history.get(addr) if h is None: continue for item in h: if item.get('raw_output_script'): prioritized_coins.append( (addr,item)) prioritized_coins = sorted( prioritized_coins, key = lambda x: x[1]['timestamp'] ) inputs = [] coins = prioritized_coins + coins for c in coins: addr, item = c v = item.get('value') total += v inputs.append((addr, v, item['tx_hash'], item['index'], item['raw_output_script'], None, None) ) fee = self.fee*len(inputs) if fixed_fee is None else fixed_fee if total >= amount + fee: break else: #print "not enough funds: %s %s"%(format_satoshis(total), format_satoshis(fee)) inputs = [] return inputs, total, fee def choose_tx_outputs( self, to_addr, amount, fee, total, change_addr=None ): outputs = [ (to_addr, amount) ] change_amount = total - ( amount + fee ) if change_amount != 0: # normally, the update thread should ensure that the last change address is unused if not change_addr: change_addr = self.change_addresses[-1] outputs.append( ( change_addr, change_amount) ) return outputs def sign_inputs( self, inputs, outputs, password ): s_inputs = [] for i in range(len(inputs)): addr, v, p_hash, p_pos, p_scriptPubKey, _, _ = inputs[i] private_key = ecdsa.SigningKey.from_string( self.get_private_key(addr, password), curve = SECP256k1 ) public_key = private_key.get_verifying_key() pubkey = public_key.to_string() tx = filter( raw_tx( inputs, outputs, for_sig = i ) ) sig = private_key.sign_digest( Hash( tx.decode('hex') ), sigencode = ecdsa.util.sigencode_der ) assert public_key.verify_digest( sig, Hash( tx.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der) s_inputs.append( (addr, v, p_hash, p_pos, p_scriptPubKey, pubkey, sig) ) return s_inputs def pw_encode(self, s, password): if password: secret = Hash(password) return EncodeAES(secret, s) else: return s def pw_decode(self, s, password): if password is not None: secret = Hash(password) d = DecodeAES(secret, s) if s == self.seed: try: d.decode('hex') except: raise ValueError("Invalid password") return d else: return s def get_status(self, address): h = self.history.get(address) if not h: status = None else: lastpoint = h[-1] status = lastpoint['block_hash'] if status == 'mempool': status = status + ':%d'% len(h) return status def receive_status_callback(self, addr, status): with self.lock: if self.get_status(addr) != status: #print "updating status for", addr, status self.interface.get_history(addr) def receive_history_callback(self, addr, data): #print "updating history for", addr with self.lock: self.history[addr] = data self.update_tx_history() self.save() def get_tx_history(self): lines = self.tx_history.values() lines = sorted(lines, key=operator.itemgetter("timestamp")) return lines def update_tx_history(self): self.tx_history= {} for addr in self.all_addresses(): h = self.history.get(addr) if h is None: continue for tx in h: tx_hash = tx['tx_hash'] line = self.tx_history.get(tx_hash) if not line: self.tx_history[tx_hash] = copy.copy(tx) line = self.tx_history.get(tx_hash) else: line['value'] += tx['value'] if line['height'] == 0: line['timestamp'] = 1e12 self.update_tx_labels() def update_tx_labels(self): for tx in self.tx_history.values(): default_label = '' if tx['value']<0: for o_addr in tx['outputs']: if not self.is_mine(o_addr): try: default_label = self.labels[o_addr] except KeyError: default_label = o_addr else: for o_addr in tx['outputs']: if self.is_mine(o_addr) and not self.is_change(o_addr): break else: for o_addr in tx['outputs']: 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 tx['default_label'] = default_label def mktx(self, to_address, amount, label, password, fee=None, change_addr=None, from_addr= None): if not self.is_valid(to_address): raise ValueError("Invalid address") inputs, total, fee = self.choose_tx_inputs( amount, fee, from_addr ) if not inputs: raise ValueError("Not enough funds") if not self.use_change and not change_addr: change_addr = inputs[0][0] print "Sending change to", change_addr outputs = self.choose_tx_outputs( to_address, amount, fee, total, change_addr ) s_inputs = self.sign_inputs( inputs, outputs, password ) tx = filter( raw_tx( s_inputs, outputs ) ) if to_address not in self.addressbook: self.addressbook.append(to_address) if label: tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex') self.labels[tx_hash] = label return tx def sendtx(self, tx): tx_hash = Hash(tx.decode('hex') )[::-1].encode('hex') self.tx_event.clear() self.interface.send([('blockchain.transaction.broadcast', [tx])]) self.tx_event.wait() out = self.tx_result if out != tx_hash: return False, "error: " + out if self.receipt: self.receipts[tx_hash] = self.receipt self.receipt = None return True, out def read_alias(self, alias): # this might not be the right place for this function. import urllib m1 = re.match('([\w\-\.]+)@((\w[\w\-]+\.)+[\w\-]+)', alias) m2 = re.match('((\w[\w\-]+\.)+[\w\-]+)', alias) if m1: url = 'http://' + m1.group(2) + '/bitcoin.id/' + m1.group(1) elif m2: url = 'http://' + alias + '/bitcoin.id' else: return '' try: lines = urllib.urlopen(url).readlines() except: return '' # line 0 line = lines[0].strip().split(':') if len(line) == 1: auth_name = None target = signing_addr = line[0] else: target, auth_name, signing_addr, signature = line msg = "alias:%s:%s:%s"%(alias,target,auth_name) print msg, signature self.verify_message(signing_addr, signature, msg) # other lines are signed updates for line in lines[1:]: line = line.strip() if not line: continue line = line.split(':') previous = target print repr(line) target, signature = line self.verify_message(previous, signature, "alias:%s:%s"%(alias,target)) if not self.is_valid(target): raise ValueError("Invalid bitcoin address") return target, signing_addr, auth_name def update_password(self, seed, old_password, new_password): if new_password == '': new_password = None self.use_encryption = (new_password != None) self.seed = self.pw_encode( seed, new_password) for k in self.imported_keys.keys(): a = self.imported_keys[k] b = self.pw_decode(a, old_password) c = self.pw_encode(b, new_password) self.imported_keys[k] = c self.save() def get_alias(self, alias, interactive = False, show_message=None, question = None): try: target, signing_address, auth_name = self.read_alias(alias) except BaseException, e: # raise exception if verify fails (verify the chain) if interactive: show_message("Alias error: " + str(e)) return print target, signing_address, auth_name if auth_name is None: a = self.aliases.get(alias) if not a: msg = "Warning: the alias '%s' is self-signed.\nThe signing address is %s.\n\nDo you want to add this alias to your list of contacts?"%(alias,signing_address) if interactive and question( msg ): self.aliases[alias] = (signing_address, target) else: target = None else: if signing_address != a[0]: msg = "Warning: the key of alias '%s' has changed since your last visit! It is possible that someone is trying to do something nasty!!!\nDo you accept to change your trusted key?"%alias if interactive and question( msg ): self.aliases[alias] = (signing_address, target) else: target = None else: if signing_address not in self.authorities.keys(): msg = "The alias: '%s' links to %s\n\nWarning: this alias was signed by an unknown key.\nSigning authority: %s\nSigning address: %s\n\nDo you want to add this key to your list of trusted keys?"%(alias,target,auth_name,signing_address) if interactive and question( msg ): self.authorities[signing_address] = auth_name else: target = None if target: self.aliases[alias] = (signing_address, target) return target def parse_url(self, url, show_message, question): o = url[8:].split('?') address = o[0] if len(o)>1: params = o[1].split('&') else: params = [] amount = label = message = signature = identity = '' for p in params: k,v = p.split('=') uv = urldecode(v) if k == 'amount': amount = uv elif k == 'message': message = uv elif k == 'label': label = uv elif k == 'signature': identity, signature = uv.split(':') url = url.replace('&%s=%s'%(k,v),'') else: print k,v if label and self.labels.get(address) != label: if question('Give label "%s" to address %s ?'%(label,address)): if address not in self.addressbook and address not in self.all_addresses(): self.addressbook.append(address) self.labels[address] = label if signature: if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', identity): signing_address = self.get_alias(identity, True, show_message, question) elif self.is_valid(identity): signing_address = identity else: signing_address = None if not signing_address: return try: self.verify_message(signing_address, signature, url ) self.receipt = (signing_address, signature, url) except: show_message('Warning: the URI contains a bad signature.\nThe identity of the recipient cannot be verified.') address = amount = label = identity = message = '' if re.match('^(|([\w\-\.]+)@)((\w[\w\-]+\.)+[\w\-]+)$', address): payto_address = self.get_alias(address, True, show_message, question) if payto_address: address = address + ' <' + payto_address + '>' return address, amount, label, message, signature, identity, url def update(self): self.interface.poke() self.up_to_date_event.wait(10000000000) def start_session(self, interface): self.interface = interface self.interface.send([('server.banner',[]), ('blockchain.numblocks.subscribe',[]), ('server.peers.subscribe',[])]) self.interface.subscribe(self.all_addresses()) def freeze(self,addr): if addr in self.all_addresses() and addr not in self.frozen_addresses: self.unprioritize(addr) self.frozen_addresses.append(addr) self.save() return True else: return False def unfreeze(self,addr): if addr in self.all_addresses() and addr in self.frozen_addresses: self.frozen_addresses.remove(addr) self.save() return True else: return False def prioritize(self,addr): if addr in self.all_addresses() and addr not in self.prioritized_addresses: self.unfreeze(addr) self.prioritized_addresses.append(addr) self.save() return True else: return False def unprioritize(self,addr): if addr in self.all_addresses() and addr in self.prioritized_addresses: self.prioritized_addresses.remove(addr) self.save() return True else: return False