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electrum-bitcoinprivate
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separate bitcoin related functions from wallet.py

This commit is contained in:
thomasv 2012-10-19 14:55:01 +02:00
parent 728ae0d184
commit 5717b43661
6 changed files with 242 additions and 229 deletions
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1
lib/__init__.py
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@ -1,3 +1,4 @@
from wallet import Wallet, format_satoshis
from interface import WalletSynchronizer, Interface, pick_random_server, DEFAULT_SERVERS
from simple_config import SimpleConfig
import bitcoin

211
lib/bitcoin.py Normal file
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@ -0,0 +1,211 @@
#!/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 hashlib, base64, ecdsa, re
def rev_hex(s):
return s.decode('hex')[::-1].encode('hex')
def int_to_hex(i, length=1):
s = hex(i)[2:].rstrip('L')
s = "0"*(2*length - len(s)) + s
return rev_hex(s)
def Hash(data):
return hashlib.sha256(hashlib.sha256(data).digest()).digest()
############ 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 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 #######################
# 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

27
lib/util.py
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@ -1,6 +1,5 @@
import os
import os, sys
import platform
import sys
def print_error(*args):
# Stringify args
@ -8,6 +7,7 @@ def print_error(*args):
sys.stderr.write(" ".join(args) + "\n")
sys.stderr.flush()
def user_dir():
if "HOME" in os.environ:
return os.path.join(os.environ["HOME"], ".electrum")
@ -18,6 +18,7 @@ def user_dir():
else:
raise BaseException("No home directory found in environment variables.")
def appdata_dir():
"""Find the path to the application data directory; add an electrum folder and return path."""
if platform.system() == "Windows":
@ -30,9 +31,11 @@ def appdata_dir():
else:
raise Exception("Unknown system")
def get_resource_path(*args):
return os.path.join(".", *args)
def local_data_dir():
"""Return path to the data folder."""
assert sys.argv
@ -40,3 +43,23 @@ def local_data_dir():
local_data = os.path.join(prefix_path, "data")
return local_data
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

219
lib/wallet.py
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@ -30,233 +30,21 @@ import aes
import ecdsa
from ecdsa.util import string_to_number, number_to_string
from util import print_error
from util import user_dir
############ 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 #######################
from util import print_error, user_dir, format_satoshis
from bitcoin import *
# 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
# AES encryption
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
class Wallet:
def __init__(self, config={}):
@ -285,7 +73,6 @@ class Wallet:
self.addressbook = config.get('contacts', []) # outgoing addresses, for payments
self.imported_keys = config.get('imported_keys',{})
# not saved
self.receipt = None # next receipt
self.tx_history = {}

12
scripts/validate_tx
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@ -2,21 +2,11 @@
import sys, hashlib
from electrum import Interface
from electrum.bitcoin import Hash, rev_hex, int_to_hex
"""validate a transaction (SPV)"""
Hash = lambda x: hashlib.sha256(hashlib.sha256(x).digest()).digest()
def rev_hex(s):
return s.decode('hex')[::-1].encode('hex')
def int_to_hex(i, length=1):
s = hex(i)[2:].rstrip('L')
s = "0"*(2*length - len(s)) + s
return rev_hex(s)
i = Interface({'server':'ecdsa.org:50002:s'})
i.start()

1
setup.py
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@ -59,6 +59,7 @@ setup(name = "Electrum",
'electrum.bmp',
'electrum.msqr',
'electrum.util',
'electrum.bitcoin',
'electrum.i18n'],
description = "Lightweight Bitcoin Wallet",
author = "thomasv",