tseparate bitcoin related functions from wallet.py - electrum - Electrum Bitcoin wallet
HTML git clone https://git.parazyd.org/electrum
DIR Log
DIR Files
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DIR Submodules
---
DIR commit 5717b43661be2b0616528911b8919f1852139a57
DIR parent 728ae0d1848ee975c466ca939f9cdd0d39153114
HTML Author: thomasv <thomasv@gitorious>
Date: Fri, 19 Oct 2012 14:55:01 +0200
separate bitcoin related functions from wallet.py
Diffstat:
M lib/__init__.py | 1 +
A lib/bitcoin.py | 211 +++++++++++++++++++++++++++++++
M lib/util.py | 27 +++++++++++++++++++++++++--
M lib/wallet.py | 219 +------------------------------
M scripts/validate_tx | 12 +-----------
M setup.py | 1 +
6 files changed, 242 insertions(+), 229 deletions(-)
---
DIR diff --git a/lib/__init__.py b/lib/__init__.py
t@@ -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
DIR diff --git a/lib/bitcoin.py b/lib/bitcoin.py
t@@ -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
+
+
DIR diff --git a/lib/util.py b/lib/util.py
t@@ -1,6 +1,5 @@
-import os
+import os, sys
import platform
-import sys
def print_error(*args):
# Stringify args
t@@ -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")
t@@ -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":
t@@ -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
t@@ -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
DIR diff --git a/lib/wallet.py b/lib/wallet.py
t@@ -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={}):
t@@ -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 = {}
DIR diff --git a/scripts/validate_tx b/scripts/validate_tx
t@@ -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()
DIR diff --git a/setup.py b/setup.py
t@@ -59,6 +59,7 @@ setup(name = "Electrum",
'electrum.bmp',
'electrum.msqr',
'electrum.util',
+ 'electrum.bitcoin',
'electrum.i18n'],
description = "Lightweight Bitcoin Wallet",
author = "thomasv",