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move transaction code and fix issue #280

283
thomasv 11 years ago
parent
d2099d94e5
commit
afac84e231
8 changed files with 747 additions and 701 deletions
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  1. 2
      gui/gui_classic.py
  2. 3
      lib/__init__.py
  3. 294
      lib/bitcoin.py
  4. 392
      lib/deserialize.py
  5. 715
      lib/transaction.py
  6. 35
      lib/wallet.py
  7. 3
      plugins/qrscanner.py
  8. 2
      setup.py

2
gui/gui_classic.py
View File

@ -41,7 +41,7 @@ except:
sys.exit("Error: Could not import icons_rc.py, please generate it with: 'pyrcc4 icons.qrc -o gui/icons_rc.py'")
from electrum.wallet import format_satoshis
from electrum.bitcoin import Transaction, is_valid
from electrum import Transaction
from electrum import mnemonic
from electrum import util, bitcoin, commands, Interface, Wallet
from electrum import SimpleConfig, Wallet, WalletStorage

3
lib/__init__.py
View File

@ -8,7 +8,8 @@ from interface import Interface, pick_random_server, DEFAULT_SERVERS
from simple_config import SimpleConfig
import bitcoin
import account
from bitcoin import Transaction, EC_KEY, is_valid
from transaction import Transaction
from mnemonic import mn_encode as mnemonic_encode
from mnemonic import mn_decode as mnemonic_decode
from commands import protected_commands, known_commands, offline_commands, Commands

294
lib/bitcoin.py
View File

@ -460,300 +460,6 @@ def bip32_private_key(sequence, k, chain):
MIN_RELAY_TX_FEE = 10000
class Transaction:
def __init__(self, raw):
self.raw = raw
self.deserialize()
self.inputs = self.d['inputs']
self.outputs = self.d['outputs']
self.outputs = map(lambda x: (x['address'],x['value']), self.outputs)
self.input_info = None
self.is_complete = True
@classmethod
def from_io(klass, inputs, outputs):
raw = klass.serialize(inputs, outputs, for_sig = -1) # for_sig=-1 means do not sign
self = klass(raw)
self.is_complete = False
self.inputs = inputs
self.outputs = outputs
extras = []
for i in self.inputs:
e = { 'txid':i['tx_hash'], 'vout':i['index'], 'scriptPubKey':i.get('raw_output_script') }
extras.append(e)
self.input_info = extras
return self
def __str__(self):
return self.raw
@classmethod
def multisig_script(klass, public_keys, num=None):
n = len(public_keys)
if num is None: num = n
# supports only "2 of 2", and "2 of 3" transactions
assert num <= n and n in [2,3]
if num==2:
s = '52'
elif num == 3:
s = '53'
else:
raise
for k in public_keys:
s += var_int(len(k)/2)
s += k
if n==2:
s += '52'
elif n==3:
s += '53'
else:
raise
s += 'ae'
return s
@classmethod
def serialize( klass, inputs, outputs, for_sig = None ):
s = int_to_hex(1,4) # version
s += var_int( len(inputs) ) # number of inputs
for i in range(len(inputs)):
txin = inputs[i]
s += txin['tx_hash'].decode('hex')[::-1].encode('hex') # prev hash
s += int_to_hex(txin['index'],4) # prev index
if for_sig is None:
signatures = txin['signatures']
pubkeys = txin['pubkeys']
if not txin.get('redeemScript'):
pubkey = pubkeys[0]
sig = signatures[0]
sig = sig + '01' # hashtype
script = op_push(len(sig)/2)
script += sig
script += op_push(len(pubkey)/2)
script += pubkey
else:
script = '00' # op_0
for sig in signatures:
sig = sig + '01'
script += op_push(len(sig)/2)
script += sig
redeem_script = klass.multisig_script(pubkeys,2)
script += op_push(len(redeem_script)/2)
script += redeem_script
elif for_sig==i:
if txin.get('redeemScript'):
script = txin['redeemScript'] # p2sh uses the inner script
else:
script = txin['raw_output_script'] # scriptsig
else:
script=''
s += var_int( len(script)/2 ) # script length
s += script
s += "ffffffff" # sequence
s += var_int( len(outputs) ) # number of outputs
for output in outputs:
addr, amount = output
s += int_to_hex( amount, 8) # amount
addrtype, hash_160 = bc_address_to_hash_160(addr)
if addrtype == 0:
script = '76a9' # op_dup, op_hash_160
script += '14' # push 0x14 bytes
script += hash_160.encode('hex')
script += '88ac' # op_equalverify, op_checksig
elif addrtype == 5:
script = 'a9' # op_hash_160
script += '14' # push 0x14 bytes
script += hash_160.encode('hex')
script += '87' # op_equal
else:
raise
s += var_int( len(script)/2 ) # script length
s += script # script
s += int_to_hex(0,4) # lock time
if for_sig is not None and for_sig != -1:
s += int_to_hex(1, 4) # hash type
return s
def for_sig(self,i):
return self.serialize(self.inputs, self.outputs, for_sig = i)
def hash(self):
return Hash(self.raw.decode('hex') )[::-1].encode('hex')
def sign(self, keypairs):
import deserialize
is_complete = True
print_error("tx.sign(), keypairs:", keypairs)
for i, txin in enumerate(self.inputs):
# if the input is multisig, parse redeem script
redeem_script = txin.get('redeemScript')
num, redeem_pubkeys = deserialize.parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
# add pubkeys
txin["pubkeys"] = redeem_pubkeys
# get list of already existing signatures
signatures = txin.get("signatures",[])
# continue if this txin is complete
if len(signatures) == num:
continue
tx_for_sig = self.serialize( self.inputs, self.outputs, for_sig = i )
for pubkey in redeem_pubkeys:
# check if we have the corresponding private key
if pubkey in keypairs.keys():
# add signature
sec = keypairs[pubkey]
compressed = is_compressed(sec)
pkey = regenerate_key(sec)
secexp = pkey.secret
private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
public_key = private_key.get_verifying_key()
sig = private_key.sign_digest( Hash( tx_for_sig.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
signatures.append( sig.encode('hex') )
print_error("adding signature for", pubkey)
txin["signatures"] = signatures
is_complete = is_complete and len(signatures) == num
self.is_complete = is_complete
self.raw = self.serialize( self.inputs, self.outputs )
def deserialize(self):
import deserialize
vds = deserialize.BCDataStream()
vds.write(self.raw.decode('hex'))
self.d = deserialize.parse_Transaction(vds)
return self.d
def has_address(self, addr):
found = False
for txin in self.inputs:
if addr == txin.get('address'):
found = True
break
for txout in self.outputs:
if addr == txout[0]:
found = True
break
return found
def get_value(self, addresses, prevout_values):
# return the balance for that tx
is_relevant = False
is_send = False
is_pruned = False
is_partial = False
v_in = v_out = v_out_mine = 0
for item in self.inputs:
addr = item.get('address')
if addr in addresses:
is_send = True
is_relevant = True
key = item['prevout_hash'] + ':%d'%item['prevout_n']
value = prevout_values.get( key )
if value is None:
is_pruned = True
else:
v_in += value
else:
is_partial = True
if not is_send: is_partial = False
for item in self.outputs:
addr, value = item
v_out += value
if addr in addresses:
v_out_mine += value
is_relevant = True
if is_pruned:
# some inputs are mine:
fee = None
if is_send:
v = v_out_mine - v_out
else:
# no input is mine
v = v_out_mine
else:
v = v_out_mine - v_in
if is_partial:
# some inputs are mine, but not all
fee = None
is_send = v < 0
else:
# all inputs are mine
fee = v_out - v_in
return is_relevant, is_send, v, fee
def as_dict(self):
import json
out = {
"hex":self.raw,
"complete":self.is_complete
}
if not self.is_complete:
extras = []
for i in self.inputs:
e = { 'txid':i['tx_hash'], 'vout':i['index'],
'scriptPubKey':i.get('raw_output_script'),
'KeyID':i.get('KeyID'),
'redeemScript':i.get('redeemScript'),
'signatures':i.get('signatures'),
'pubkeys':i.get('pubkeys'),
}
extras.append(e)
self.input_info = extras
if self.input_info:
out['input_info'] = json.dumps(self.input_info).replace(' ','')
return out
def requires_fee(self, verifier):
# see https://en.bitcoin.it/wiki/Transaction_fees
threshold = 57600000
size = len(self.raw)/2
if size >= 10000:
return True
for o in self.outputs:
value = o[1]
if value < 1000000:
return True
sum = 0
for i in self.inputs:
age = verifier.get_confirmations(i["tx_hash"])[0]
sum += i["value"] * age
priority = sum / size
print_error(priority, threshold)
return priority < threshold
def test_bip32(seed, sequence):

392
lib/deserialize.py
View File

@ -1,392 +0,0 @@
# this code comes from ABE. it can probably be simplified
#
#
from bitcoin import public_key_to_bc_address, hash_160_to_bc_address, hash_encode, hash_160
from util import print_error
#import socket
import time
import struct
#
# Workalike python implementation of Bitcoin's CDataStream class.
#
import struct
import StringIO
import mmap
class SerializationError(Exception):
""" Thrown when there's a problem deserializing or serializing """
class BCDataStream(object):
def __init__(self):
self.input = None
self.read_cursor = 0
def clear(self):
self.input = None
self.read_cursor = 0
def write(self, bytes): # Initialize with string of bytes
if self.input is None:
self.input = bytes
else:
self.input += bytes
def map_file(self, file, start): # Initialize with bytes from file
self.input = mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ)
self.read_cursor = start
def seek_file(self, position):
self.read_cursor = position
def close_file(self):
self.input.close()
def read_string(self):
# Strings are encoded depending on length:
# 0 to 252 : 1-byte-length followed by bytes (if any)
# 253 to 65,535 : byte'253' 2-byte-length followed by bytes
# 65,536 to 4,294,967,295 : byte '254' 4-byte-length followed by bytes
# ... and the Bitcoin client is coded to understand:
# greater than 4,294,967,295 : byte '255' 8-byte-length followed by bytes of string
# ... but I don't think it actually handles any strings that big.
if self.input is None:
raise SerializationError("call write(bytes) before trying to deserialize")
try:
length = self.read_compact_size()
except IndexError:
raise SerializationError("attempt to read past end of buffer")
return self.read_bytes(length)
def write_string(self, string):
# Length-encoded as with read-string
self.write_compact_size(len(string))
self.write(string)
def read_bytes(self, length):
try:
result = self.input[self.read_cursor:self.read_cursor+length]
self.read_cursor += length
return result
except IndexError:
raise SerializationError("attempt to read past end of buffer")
return ''
def read_boolean(self): return self.read_bytes(1)[0] != chr(0)
def read_int16(self): return self._read_num('<h')
def read_uint16(self): return self._read_num('<H')
def read_int32(self): return self._read_num('<i')
def read_uint32(self): return self._read_num('<I')
def read_int64(self): return self._read_num('<q')
def read_uint64(self): return self._read_num('<Q')
def write_boolean(self, val): return self.write(chr(1) if val else chr(0))
def write_int16(self, val): return self._write_num('<h', val)
def write_uint16(self, val): return self._write_num('<H', val)
def write_int32(self, val): return self._write_num('<i', val)
def write_uint32(self, val): return self._write_num('<I', val)
def write_int64(self, val): return self._write_num('<q', val)
def write_uint64(self, val): return self._write_num('<Q', val)
def read_compact_size(self):
size = ord(self.input[self.read_cursor])
self.read_cursor += 1
if size == 253:
size = self._read_num('<H')
elif size == 254:
size = self._read_num('<I')
elif size == 255:
size = self._read_num('<Q')
return size
def write_compact_size(self, size):
if size < 0:
raise SerializationError("attempt to write size < 0")
elif size < 253:
self.write(chr(size))
elif size < 2**16:
self.write('\xfd')
self._write_num('<H', size)
elif size < 2**32:
self.write('\xfe')
self._write_num('<I', size)
elif size < 2**64:
self.write('\xff')
self._write_num('<Q', size)
def _read_num(self, format):
(i,) = struct.unpack_from(format, self.input, self.read_cursor)
self.read_cursor += struct.calcsize(format)
return i
def _write_num(self, format, num):
s = struct.pack(format, num)
self.write(s)
#
# enum-like type
# From the Python Cookbook, downloaded from http://code.activestate.com/recipes/67107/
#
import types, string, exceptions
class EnumException(exceptions.Exception):
pass
class Enumeration:
def __init__(self, name, enumList):
self.__doc__ = name
lookup = { }
reverseLookup = { }
i = 0
uniqueNames = [ ]
uniqueValues = [ ]
for x in enumList:
if type(x) == types.TupleType:
x, i = x
if type(x) != types.StringType:
raise EnumException, "enum name is not a string: " + x
if type(i) != types.IntType:
raise EnumException, "enum value is not an integer: " + i
if x in uniqueNames:
raise EnumException, "enum name is not unique: " + x
if i in uniqueValues:
raise EnumException, "enum value is not unique for " + x
uniqueNames.append(x)
uniqueValues.append(i)
lookup[x] = i
reverseLookup[i] = x
i = i + 1
self.lookup = lookup
self.reverseLookup = reverseLookup
def __getattr__(self, attr):
if not self.lookup.has_key(attr):
raise AttributeError
return self.lookup[attr]
def whatis(self, value):
return self.reverseLookup[value]
# This function comes from bitcointools, bct-LICENSE.txt.
def long_hex(bytes):
return bytes.encode('hex_codec')
# This function comes from bitcointools, bct-LICENSE.txt.
def short_hex(bytes):
t = bytes.encode('hex_codec')
if len(t) < 11:
return t
return t[0:4]+"..."+t[-4:]
def parse_TxIn(vds):
d = {}
d['prevout_hash'] = hash_encode(vds.read_bytes(32))
d['prevout_n'] = vds.read_uint32()
scriptSig = vds.read_bytes(vds.read_compact_size())
d['sequence'] = vds.read_uint32()
if scriptSig:
pubkeys, signatures, address = get_address_from_input_script(scriptSig)
else:
pubkeys = []
signatures = []
address = None
d['address'] = address
d['signatures'] = signatures
return d
def parse_TxOut(vds, i):
d = {}
d['value'] = vds.read_int64()
scriptPubKey = vds.read_bytes(vds.read_compact_size())
d['address'] = get_address_from_output_script(scriptPubKey)
d['raw_output_script'] = scriptPubKey.encode('hex')
d['index'] = i
return d
def parse_Transaction(vds):
d = {}
start = vds.read_cursor
d['version'] = vds.read_int32()
n_vin = vds.read_compact_size()
d['inputs'] = []
for i in xrange(n_vin):
d['inputs'].append(parse_TxIn(vds))
n_vout = vds.read_compact_size()
d['outputs'] = []
for i in xrange(n_vout):
d['outputs'].append(parse_TxOut(vds, i))
d['lockTime'] = vds.read_uint32()
return d
def parse_redeemScript(bytes):
dec = [ x for x in script_GetOp(bytes.decode('hex')) ]
# 2 of 2
match = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec, match):
pubkeys = [ dec[1][1].encode('hex'), dec[2][1].encode('hex') ]
return 2, pubkeys
# 2 of 3
match = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec, match):
pubkeys = [ dec[1][1].encode('hex'), dec[2][1].encode('hex'), dec[3][1].encode('hex') ]
return 2, pubkeys
opcodes = Enumeration("Opcodes", [
("OP_0", 0), ("OP_PUSHDATA1",76), "OP_PUSHDATA2", "OP_PUSHDATA4", "OP_1NEGATE", "OP_RESERVED",
"OP_1", "OP_2", "OP_3", "OP_4", "OP_5", "OP_6", "OP_7",
"OP_8", "OP_9", "OP_10", "OP_11", "OP_12", "OP_13", "OP_14", "OP_15", "OP_16",
"OP_NOP", "OP_VER", "OP_IF", "OP_NOTIF", "OP_VERIF", "OP_VERNOTIF", "OP_ELSE", "OP_ENDIF", "OP_VERIFY",
"OP_RETURN", "OP_TOALTSTACK", "OP_FROMALTSTACK", "OP_2DROP", "OP_2DUP", "OP_3DUP", "OP_2OVER", "OP_2ROT", "OP_2SWAP",
"OP_IFDUP", "OP_DEPTH", "OP_DROP", "OP_DUP", "OP_NIP", "OP_OVER", "OP_PICK", "OP_ROLL", "OP_ROT",
"OP_SWAP", "OP_TUCK", "OP_CAT", "OP_SUBSTR", "OP_LEFT", "OP_RIGHT", "OP_SIZE", "OP_INVERT", "OP_AND",
"OP_OR", "OP_XOR", "OP_EQUAL", "OP_EQUALVERIFY", "OP_RESERVED1", "OP_RESERVED2", "OP_1ADD", "OP_1SUB", "OP_2MUL",
"OP_2DIV", "OP_NEGATE", "OP_ABS", "OP_NOT", "OP_0NOTEQUAL", "OP_ADD", "OP_SUB", "OP_MUL", "OP_DIV",
"OP_MOD", "OP_LSHIFT", "OP_RSHIFT", "OP_BOOLAND", "OP_BOOLOR",
"OP_NUMEQUAL", "OP_NUMEQUALVERIFY", "OP_NUMNOTEQUAL", "OP_LESSTHAN",
"OP_GREATERTHAN", "OP_LESSTHANOREQUAL", "OP_GREATERTHANOREQUAL", "OP_MIN", "OP_MAX",
"OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
"OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
"OP_CHECKMULTISIGVERIFY",
("OP_SINGLEBYTE_END", 0xF0),
("OP_DOUBLEBYTE_BEGIN", 0xF000),
"OP_PUBKEY", "OP_PUBKEYHASH",
("OP_INVALIDOPCODE", 0xFFFF),
])
def script_GetOp(bytes):
i = 0
while i < len(bytes):
vch = None
opcode = ord(bytes[i])
i += 1
if opcode >= opcodes.OP_SINGLEBYTE_END:
opcode <<= 8
opcode |= ord(bytes[i])
i += 1
if opcode <= opcodes.OP_PUSHDATA4:
nSize = opcode
if opcode == opcodes.OP_PUSHDATA1:
nSize = ord(bytes[i])
i += 1
elif opcode == opcodes.OP_PUSHDATA2:
(nSize,) = struct.unpack_from('<H', bytes, i)
i += 2
elif opcode == opcodes.OP_PUSHDATA4:
(nSize,) = struct.unpack_from('<I', bytes, i)
i += 4
vch = bytes[i:i+nSize]
i += nSize
yield (opcode, vch, i)
def script_GetOpName(opcode):
return (opcodes.whatis(opcode)).replace("OP_", "")
def decode_script(bytes):
result = ''
for (opcode, vch, i) in script_GetOp(bytes):
if len(result) > 0: result += " "
if opcode <= opcodes.OP_PUSHDATA4:
result += "%d:"%(opcode,)
result += short_hex(vch)
else:
result += script_GetOpName(opcode)
return result
def match_decoded(decoded, to_match):
if len(decoded) != len(to_match):
return False;
for i in range(len(decoded)):
if to_match[i] == opcodes.OP_PUSHDATA4 and decoded[i][0] <= opcodes.OP_PUSHDATA4 and decoded[i][0]>0:
continue # Opcodes below OP_PUSHDATA4 all just push data onto stack, and are equivalent.
if to_match[i] != decoded[i][0]:
return False
return True
def get_address_from_input_script(bytes):
try:
decoded = [ x for x in script_GetOp(bytes) ]
except:
# coinbase transactions raise an exception
print_error("cannot find address in input script", bytes.encode('hex'))
return [], [], "(None)"
# non-generated TxIn transactions push a signature
# (seventy-something bytes) and then their public key
# (65 bytes) onto the stack:
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
if match_decoded(decoded, match):
return None, None, public_key_to_bc_address(decoded[1][1])
# p2sh transaction, 2 of n
match = [ opcodes.OP_0 ]
while len(match) < len(decoded):
match.append(opcodes.OP_PUSHDATA4)
if match_decoded(decoded, match):
redeemScript = decoded[-1][1]
num = len(match) - 2
signatures = map(lambda x:x[1][:-1].encode('hex'), decoded[1:-1])
dec2 = [ x for x in script_GetOp(redeemScript) ]
# 2 of 2
match2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec2, match2):
pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex') ]
return pubkeys, signatures, hash_160_to_bc_address(hash_160(redeemScript), 5)
# 2 of 3
match2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec2, match2):
pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex'), dec2[3][1].encode('hex') ]
return pubkeys, signatures, hash_160_to_bc_address(hash_160(redeemScript), 5)
print_error("cannot find address in input script", bytes.encode('hex'))
return [], [], "(None)"
def get_address_from_output_script(bytes):
decoded = [ x for x in script_GetOp(bytes) ]
# The Genesis Block, self-payments, and pay-by-IP-address payments look like:
# 65 BYTES:... CHECKSIG
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_CHECKSIG ]
if match_decoded(decoded, match):
return public_key_to_bc_address(decoded[0][1])
# Pay-by-Bitcoin-address TxOuts look like:
# DUP HASH160 20 BYTES:... EQUALVERIFY CHECKSIG
match = [ opcodes.OP_DUP, opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUALVERIFY, opcodes.OP_CHECKSIG ]
if match_decoded(decoded, match):
return hash_160_to_bc_address(decoded[2][1])
# p2sh
match = [ opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUAL ]
if match_decoded(decoded, match):
return hash_160_to_bc_address(decoded[1][1],5)
return "(None)"

715
lib/transaction.py
View File

@ -0,0 +1,715 @@
#!/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/>.
# Note: The deserialization code originally comes from ABE.
from bitcoin import *
from util import print_error
import time
import struct
#
# Workalike python implementation of Bitcoin's CDataStream class.
#
import struct
import StringIO
import mmap
class SerializationError(Exception):
""" Thrown when there's a problem deserializing or serializing """
class BCDataStream(object):
def __init__(self):
self.input = None
self.read_cursor = 0
def clear(self):
self.input = None
self.read_cursor = 0
def write(self, bytes): # Initialize with string of bytes
if self.input is None:
self.input = bytes
else:
self.input += bytes
def map_file(self, file, start): # Initialize with bytes from file
self.input = mmap.mmap(file.fileno(), 0, access=mmap.ACCESS_READ)
self.read_cursor = start
def seek_file(self, position):
self.read_cursor = position
def close_file(self):
self.input.close()
def read_string(self):
# Strings are encoded depending on length:
# 0 to 252 : 1-byte-length followed by bytes (if any)
# 253 to 65,535 : byte'253' 2-byte-length followed by bytes
# 65,536 to 4,294,967,295 : byte '254' 4-byte-length followed by bytes
# ... and the Bitcoin client is coded to understand:
# greater than 4,294,967,295 : byte '255' 8-byte-length followed by bytes of string
# ... but I don't think it actually handles any strings that big.
if self.input is None:
raise SerializationError("call write(bytes) before trying to deserialize")
try:
length = self.read_compact_size()
except IndexError:
raise SerializationError("attempt to read past end of buffer")
return self.read_bytes(length)
def write_string(self, string):
# Length-encoded as with read-string
self.write_compact_size(len(string))
self.write(string)
def read_bytes(self, length):
try:
result = self.input[self.read_cursor:self.read_cursor+length]
self.read_cursor += length
return result
except IndexError:
raise SerializationError("attempt to read past end of buffer")
return ''
def read_boolean(self): return self.read_bytes(1)[0] != chr(0)
def read_int16(self): return self._read_num('<h')
def read_uint16(self): return self._read_num('<H')
def read_int32(self): return self._read_num('<i')
def read_uint32(self): return self._read_num('<I')
def read_int64(self): return self._read_num('<q')
def read_uint64(self): return self._read_num('<Q')
def write_boolean(self, val): return self.write(chr(1) if val else chr(0))
def write_int16(self, val): return self._write_num('<h', val)
def write_uint16(self, val): return self._write_num('<H', val)
def write_int32(self, val): return self._write_num('<i', val)
def write_uint32(self, val): return self._write_num('<I', val)
def write_int64(self, val): return self._write_num('<q', val)
def write_uint64(self, val): return self._write_num('<Q', val)
def read_compact_size(self):
size = ord(self.input[self.read_cursor])
self.read_cursor += 1
if size == 253:
size = self._read_num('<H')
elif size == 254:
size = self._read_num('<I')
elif size == 255:
size = self._read_num('<Q')
return size
def write_compact_size(self, size):
if size < 0:
raise SerializationError("attempt to write size < 0")
elif size < 253:
self.write(chr(size))
elif size < 2**16:
self.write('\xfd')
self._write_num('<H', size)
elif size < 2**32:
self.write('\xfe')
self._write_num('<I', size)
elif size < 2**64:
self.write('\xff')
self._write_num('<Q', size)
def _read_num(self, format):
(i,) = struct.unpack_from(format, self.input, self.read_cursor)
self.read_cursor += struct.calcsize(format)
return i
def _write_num(self, format, num):
s = struct.pack(format, num)
self.write(s)
#
# enum-like type
# From the Python Cookbook, downloaded from http://code.activestate.com/recipes/67107/
#
import types, string, exceptions
class EnumException(exceptions.Exception):
pass
class Enumeration:
def __init__(self, name, enumList):
self.__doc__ = name
lookup = { }
reverseLookup = { }
i = 0
uniqueNames = [ ]
uniqueValues = [ ]
for x in enumList:
if type(x) == types.TupleType:
x, i = x
if type(x) != types.StringType:
raise EnumException, "enum name is not a string: " + x
if type(i) != types.IntType:
raise EnumException, "enum value is not an integer: " + i
if x in uniqueNames:
raise EnumException, "enum name is not unique: " + x
if i in uniqueValues:
raise EnumException, "enum value is not unique for " + x
uniqueNames.append(x)
uniqueValues.append(i)
lookup[x] = i
reverseLookup[i] = x
i = i + 1
self.lookup = lookup
self.reverseLookup = reverseLookup
def __getattr__(self, attr):
if not self.lookup.has_key(attr):
raise AttributeError
return self.lookup[attr]
def whatis(self, value):
return self.reverseLookup[value]
# This function comes from bitcointools, bct-LICENSE.txt.
def long_hex(bytes):
return bytes.encode('hex_codec')
# This function comes from bitcointools, bct-LICENSE.txt.
def short_hex(bytes):
t = bytes.encode('hex_codec')
if len(t) < 11:
return t
return t[0:4]+"..."+t[-4:]
def parse_redeemScript(bytes):
dec = [ x for x in script_GetOp(bytes.decode('hex')) ]
# 2 of 2
match = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec, match):
pubkeys = [ dec[1][1].encode('hex'), dec[2][1].encode('hex') ]
return 2, pubkeys
# 2 of 3
match = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec, match):
pubkeys = [ dec[1][1].encode('hex'), dec[2][1].encode('hex'), dec[3][1].encode('hex') ]
return 2, pubkeys
opcodes = Enumeration("Opcodes", [
("OP_0", 0), ("OP_PUSHDATA1",76), "OP_PUSHDATA2", "OP_PUSHDATA4", "OP_1NEGATE", "OP_RESERVED",
"OP_1", "OP_2", "OP_3", "OP_4", "OP_5", "OP_6", "OP_7",
"OP_8", "OP_9", "OP_10", "OP_11", "OP_12", "OP_13", "OP_14", "OP_15", "OP_16",
"OP_NOP", "OP_VER", "OP_IF", "OP_NOTIF", "OP_VERIF", "OP_VERNOTIF", "OP_ELSE", "OP_ENDIF", "OP_VERIFY",
"OP_RETURN", "OP_TOALTSTACK", "OP_FROMALTSTACK", "OP_2DROP", "OP_2DUP", "OP_3DUP", "OP_2OVER", "OP_2ROT", "OP_2SWAP",
"OP_IFDUP", "OP_DEPTH", "OP_DROP", "OP_DUP", "OP_NIP", "OP_OVER", "OP_PICK", "OP_ROLL", "OP_ROT",
"OP_SWAP", "OP_TUCK", "OP_CAT", "OP_SUBSTR", "OP_LEFT", "OP_RIGHT", "OP_SIZE", "OP_INVERT", "OP_AND",
"OP_OR", "OP_XOR", "OP_EQUAL", "OP_EQUALVERIFY", "OP_RESERVED1", "OP_RESERVED2", "OP_1ADD", "OP_1SUB", "OP_2MUL",
"OP_2DIV", "OP_NEGATE", "OP_ABS", "OP_NOT", "OP_0NOTEQUAL", "OP_ADD", "OP_SUB", "OP_MUL", "OP_DIV",
"OP_MOD", "OP_LSHIFT", "OP_RSHIFT", "OP_BOOLAND", "OP_BOOLOR",
"OP_NUMEQUAL", "OP_NUMEQUALVERIFY", "OP_NUMNOTEQUAL", "OP_LESSTHAN",
"OP_GREATERTHAN", "OP_LESSTHANOREQUAL", "OP_GREATERTHANOREQUAL", "OP_MIN", "OP_MAX",
"OP_WITHIN", "OP_RIPEMD160", "OP_SHA1", "OP_SHA256", "OP_HASH160",
"OP_HASH256", "OP_CODESEPARATOR", "OP_CHECKSIG", "OP_CHECKSIGVERIFY", "OP_CHECKMULTISIG",
"OP_CHECKMULTISIGVERIFY",
("OP_SINGLEBYTE_END", 0xF0),
("OP_DOUBLEBYTE_BEGIN", 0xF000),
"OP_PUBKEY", "OP_PUBKEYHASH",
("OP_INVALIDOPCODE", 0xFFFF),
])
def script_GetOp(bytes):
i = 0
while i < len(bytes):
vch = None
opcode = ord(bytes[i])
i += 1
if opcode >= opcodes.OP_SINGLEBYTE_END:
opcode <<= 8
opcode |= ord(bytes[i])
i += 1
if opcode <= opcodes.OP_PUSHDATA4:
nSize = opcode
if opcode == opcodes.OP_PUSHDATA1:
nSize = ord(bytes[i])
i += 1
elif opcode == opcodes.OP_PUSHDATA2:
(nSize,) = struct.unpack_from('<H', bytes, i)
i += 2
elif opcode == opcodes.OP_PUSHDATA4:
(nSize,) = struct.unpack_from('<I', bytes, i)
i += 4
vch = bytes[i:i+nSize]
i += nSize
yield (opcode, vch, i)
def script_GetOpName(opcode):
return (opcodes.whatis(opcode)).replace("OP_", "")
def decode_script(bytes):
result = ''
for (opcode, vch, i) in script_GetOp(bytes):
if len(result) > 0: result += " "
if opcode <= opcodes.OP_PUSHDATA4:
result += "%d:"%(opcode,)
result += short_hex(vch)
else:
result += script_GetOpName(opcode)
return result
def match_decoded(decoded, to_match):
if len(decoded) != len(to_match):
return False;
for i in range(len(decoded)):
if to_match[i] == opcodes.OP_PUSHDATA4 and decoded[i][0] <= opcodes.OP_PUSHDATA4 and decoded[i][0]>0:
continue # Opcodes below OP_PUSHDATA4 all just push data onto stack, and are equivalent.
if to_match[i] != decoded[i][0]:
return False
return True
def get_address_from_input_script(bytes):
try:
decoded = [ x for x in script_GetOp(bytes) ]
except:
# coinbase transactions raise an exception
print_error("cannot find address in input script", bytes.encode('hex'))
return [], [], "(None)"
# payto_pubkey
match = [ opcodes.OP_PUSHDATA4 ]
if match_decoded(decoded, match):
return None, None, "(pubkey)"
# non-generated TxIn transactions push a signature
# (seventy-something bytes) and then their public key
# (65 bytes) onto the stack:
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4 ]
if match_decoded(decoded, match):
return None, None, public_key_to_bc_address(decoded[1][1])
# p2sh transaction, 2 of n
match = [ opcodes.OP_0 ]
while len(match) < len(decoded):
match.append(opcodes.OP_PUSHDATA4)
if match_decoded(decoded, match):
redeemScript = decoded[-1][1]
num = len(match) - 2
signatures = map(lambda x:x[1][:-1].encode('hex'), decoded[1:-1])
dec2 = [ x for x in script_GetOp(redeemScript) ]
# 2 of 2
match2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_2, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec2, match2):
pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex') ]
return pubkeys, signatures, hash_160_to_bc_address(hash_160(redeemScript), 5)
# 2 of 3
match2 = [ opcodes.OP_2, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_PUSHDATA4, opcodes.OP_3, opcodes.OP_CHECKMULTISIG ]
if match_decoded(dec2, match2):
pubkeys = [ dec2[1][1].encode('hex'), dec2[2][1].encode('hex'), dec2[3][1].encode('hex') ]
return pubkeys, signatures, hash_160_to_bc_address(hash_160(redeemScript), 5)
print_error("cannot find address in input script", bytes.encode('hex'))
return [], [], "(None)"
def get_address_from_output_script(bytes):
decoded = [ x for x in script_GetOp(bytes) ]
# The Genesis Block, self-payments, and pay-by-IP-address payments look like:
# 65 BYTES:... CHECKSIG
match = [ opcodes.OP_PUSHDATA4, opcodes.OP_CHECKSIG ]
if match_decoded(decoded, match):
return True, public_key_to_bc_address(decoded[0][1])
# Pay-by-Bitcoin-address TxOuts look like:
# DUP HASH160 20 BYTES:... EQUALVERIFY CHECKSIG
match = [ opcodes.OP_DUP, opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUALVERIFY, opcodes.OP_CHECKSIG ]
if match_decoded(decoded, match):
return False, hash_160_to_bc_address(decoded[2][1])
# p2sh
match = [ opcodes.OP_HASH160, opcodes.OP_PUSHDATA4, opcodes.OP_EQUAL ]
if match_decoded(decoded, match):
return False, hash_160_to_bc_address(decoded[1][1],5)
return False, "(None)"
class Transaction:
def __init__(self, raw):
self.raw = raw
self.deserialize()
self.inputs = self.d['inputs']
self.outputs = self.d['outputs']
self.outputs = map(lambda x: (x['address'],x['value']), self.outputs)
self.input_info = None
self.is_complete = True
@classmethod
def from_io(klass, inputs, outputs):
raw = klass.serialize(inputs, outputs, for_sig = -1) # for_sig=-1 means do not sign
self = klass(raw)
self.is_complete = False
self.inputs = inputs
self.outputs = outputs
extras = []
for i in self.inputs:
e = { 'txid':i['tx_hash'], 'vout':i['index'], 'scriptPubKey':i.get('raw_output_script') }
extras.append(e)
self.input_info = extras
return self
def __str__(self):
return self.raw
@classmethod
def multisig_script(klass, public_keys, num=None):
n = len(public_keys)
if num is None: num = n
# supports only "2 of 2", and "2 of 3" transactions
assert num <= n and n in [2,3]
if num==2:
s = '52'
elif num == 3:
s = '53'
else:
raise
for k in public_keys:
s += var_int(len(k)/2)
s += k
if n==2:
s += '52'
elif n==3:
s += '53'
else:
raise
s += 'ae'
return s
@classmethod
def serialize( klass, inputs, outputs, for_sig = None ):
s = int_to_hex(1,4) # version
s += var_int( len(inputs) ) # number of inputs
for i in range(len(inputs)):
txin = inputs[i]
s += txin['tx_hash'].decode('hex')[::-1].encode('hex') # prev hash
s += int_to_hex(txin['index'],4) # prev index
if for_sig is None:
signatures = txin['signatures']
pubkeys = txin['pubkeys']
if not txin.get('redeemScript'):
pubkey = pubkeys[0]
sig = signatures[0]
sig = sig + '01' # hashtype
script = op_push(len(sig)/2)
script += sig
script += op_push(len(pubkey)/2)
script += pubkey
else:
script = '00' # op_0
for sig in signatures:
sig = sig + '01'
script += op_push(len(sig)/2)
script += sig
redeem_script = klass.multisig_script(pubkeys,2)
script += op_push(len(redeem_script)/2)
script += redeem_script
elif for_sig==i:
if txin.get('redeemScript'):
script = txin['redeemScript'] # p2sh uses the inner script
else:
script = txin['raw_output_script'] # scriptsig
else:
script=''
s += var_int( len(script)/2 ) # script length
s += script
s += "ffffffff" # sequence
s += var_int( len(outputs) ) # number of outputs
for output in outputs:
addr, amount = output
s += int_to_hex( amount, 8) # amount
addrtype, hash_160 = bc_address_to_hash_160(addr)
if addrtype == 0:
script = '76a9' # op_dup, op_hash_160
script += '14' # push 0x14 bytes
script += hash_160.encode('hex')
script += '88ac' # op_equalverify, op_checksig
elif addrtype == 5:
script = 'a9' # op_hash_160
script += '14' # push 0x14 bytes
script += hash_160.encode('hex')
script += '87' # op_equal
else:
raise
s += var_int( len(script)/2 ) # script length
s += script # script
s += int_to_hex(0,4) # lock time
if for_sig is not None and for_sig != -1:
s += int_to_hex(1, 4) # hash type
return s
def for_sig(self,i):
return self.serialize(self.inputs, self.outputs, for_sig = i)
def hash(self):
return Hash(self.raw.decode('hex') )[::-1].encode('hex')
def sign(self, keypairs):
is_complete = True
print_error("tx.sign(), keypairs:", keypairs)
for i, txin in enumerate(self.inputs):
# if the input is multisig, parse redeem script
redeem_script = txin.get('redeemScript')
num, redeem_pubkeys = parse_redeemScript(redeem_script) if redeem_script else (1, [txin.get('redeemPubkey')])
# add pubkeys
txin["pubkeys"] = redeem_pubkeys
# get list of already existing signatures
signatures = txin.get("signatures",[])
# continue if this txin is complete
if len(signatures) == num:
continue
tx_for_sig = self.serialize( self.inputs, self.outputs, for_sig = i )
for pubkey in redeem_pubkeys:
# check if we have the corresponding private key
if pubkey in keypairs.keys():
# add signature
sec = keypairs[pubkey]
compressed = is_compressed(sec)
pkey = regenerate_key(sec)
secexp = pkey.secret
private_key = ecdsa.SigningKey.from_secret_exponent( secexp, curve = SECP256k1 )
public_key = private_key.get_verifying_key()
sig = private_key.sign_digest( Hash( tx_for_sig.decode('hex') ), sigencode = ecdsa.util.sigencode_der )
assert public_key.verify_digest( sig, Hash( tx_for_sig.decode('hex') ), sigdecode = ecdsa.util.sigdecode_der)
signatures.append( sig.encode('hex') )
print_error("adding signature for", pubkey)
txin["signatures"] = signatures
is_complete = is_complete and len(signatures) == num
self.is_complete = is_complete
self.raw = self.serialize( self.inputs, self.outputs )
def deserialize(self):
vds = BCDataStream()
vds.write(self.raw.decode('hex'))
d = {}
start = vds.read_cursor
d['version'] = vds.read_int32()
n_vin = vds.read_compact_size()
d['inputs'] = []
for i in xrange(n_vin):
d['inputs'].append(self.parse_input(vds))
n_vout = vds.read_compact_size()
d['outputs'] = []
for i in xrange(n_vout):
d['outputs'].append(self.parse_output(vds, i))
d['lockTime'] = vds.read_uint32()
self.d = d
return self.d
def parse_input(self, vds):
d = {}
d['prevout_hash'] = hash_encode(vds.read_bytes(32))
d['prevout_n'] = vds.read_uint32()
scriptSig = vds.read_bytes(vds.read_compact_size())
d['sequence'] = vds.read_uint32()
if scriptSig:
pubkeys, signatures, address = get_address_from_input_script(scriptSig)
else:
pubkeys = []
signatures = []
address = None
d['address'] = address
d['signatures'] = signatures
return d
def parse_output(self, vds, i):
d = {}
d['value'] = vds.read_int64()
scriptPubKey = vds.read_bytes(vds.read_compact_size())
is_pubkey, address = get_address_from_output_script(scriptPubKey)
d['is_pubkey'] = is_pubkey
d['address'] = address
d['raw_output_script'] = scriptPubKey.encode('hex')
d['index'] = i
return d
def add_extra_addresses(self, txlist):
for i in self.inputs:
if i.get("address") == "(pubkey)":
prev_tx = txlist.get(i.get('prevout_hash'))
if prev_tx:
address, value = prev_tx.outputs[i.get('prevout_n')]
print_error("found pay-to-pubkey address:", address)
i["address"] = address
def has_address(self, addr):
found = False
for txin in self.inputs:
if addr == txin.get('address'):
found = True
break
for txout in self.outputs:
if addr == txout[0]:
found = True
break
return found
def get_value(self, addresses, prevout_values):
# return the balance for that tx
is_relevant = False
is_send = False
is_pruned = False
is_partial = False
v_in = v_out = v_out_mine = 0
for item in self.inputs:
addr = item.get('address')
if addr in addresses:
is_send = True
is_relevant = True
key = item['prevout_hash'] + ':%d'%item['prevout_n']
value = prevout_values.get( key )
if value is None:
is_pruned = True
else:
v_in += value
else:
is_partial = True
if not is_send: is_partial = False
for item in self.outputs:
addr, value = item
v_out += value
if addr in addresses:
v_out_mine += value
is_relevant = True
if is_pruned:
# some inputs are mine:
fee = None
if is_send:
v = v_out_mine - v_out
else:
# no input is mine
v = v_out_mine
else:
v = v_out_mine - v_in
if is_partial:
# some inputs are mine, but not all
fee = None
is_send = v < 0
else:
# all inputs are mine
fee = v_out - v_in
return is_relevant, is_send, v, fee
def as_dict(self):
import json
out = {
"hex":self.raw,
"complete":self.is_complete
}
if not self.is_complete:
extras = []
for i in self.inputs:
e = { 'txid':i['tx_hash'], 'vout':i['index'],
'scriptPubKey':i.get('raw_output_script'),
'KeyID':i.get('KeyID'),
'redeemScript':i.get('redeemScript'),
'signatures':i.get('signatures'),
'pubkeys':i.get('pubkeys'),
}
extras.append(e)
self.input_info = extras
if self.input_info:
out['input_info'] = json.dumps(self.input_info).replace(' ','')
return out
def requires_fee(self, verifier):
# see https://en.bitcoin.it/wiki/Transaction_fees
threshold = 57600000
size = len(self.raw)/2
if size >= 10000:
return True
for o in self.outputs:
value = o[1]
if value < 1000000:
return True
sum = 0
for i in self.inputs:
age = verifier.get_confirmations(i["tx_hash"])[0]
sum += i["value"] * age
priority = sum / size
print_error(priority, threshold)
return priority < threshold

35
lib/wallet.py
View File

@ -33,6 +33,7 @@ import time
from util import print_msg, print_error, format_satoshis
from bitcoin import *
from account import *
from transaction import Transaction
# AES encryption
EncodeAES = lambda secret, s: base64.b64encode(aes.encryptData(secret,s))
@ -164,11 +165,16 @@ class Wallet:
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")
tx_list = self.storage.get('transactions',{})
for k,v in tx_list.items():
tx = Transaction(v)
try:
tx = Transaction(v)
except:
print_msg("Warning: Cannot deserialize transactions. skipping")
continue
self.add_transaction(tx)
# not saved
self.prevout_values = {} # my own transaction outputs
@ -194,6 +200,17 @@ class Wallet:
self.transactions.pop(tx_hash)
def add_transaction(self, tx):
h = tx.hash()
self.transactions[h] = tx
# find the address corresponding to pay-to-pubkey inputs
tx.add_extra_addresses(self.transactions)
for o in tx.d.get('outputs'):
if o.get('is_pubkey'):
for tx2 in self.transactions.values():
tx2.add_extra_addresses({h:tx})
def set_up_to_date(self,b):
with self.lock: self.up_to_date = b
@ -521,7 +538,7 @@ class Wallet:
def signrawtransaction(self, tx, input_info, private_keys, password):
import deserialize
unspent_coins = self.get_unspent_coins()
seed = self.decode_seed(password)
@ -587,7 +604,7 @@ class Wallet:
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'))
addr = transaction.get_address_from_output_script(txin["raw_output_script"].decode('hex'))
txin['address'] = addr
# add private keys that are in the wallet
@ -1002,10 +1019,8 @@ class Wallet:
return
with self.transaction_lock:
self.transactions[tx_hash] = tx
self.add_transaction(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)

3
plugins/qrscanner.py
View File

@ -5,7 +5,8 @@ from PyQt4.QtCore import Qt
from electrum_gui.i18n import _
import re
from electrum.bitcoin import MIN_RELAY_TX_FEE, Transaction, is_valid
from electrum import Transaction
from electrum.bitcoin import MIN_RELAY_TX_FEE, is_valid
from electrum_gui.qrcodewidget import QRCodeWidget
import electrum_gui.bmp
import json

2
setup.py
View File

@ -67,7 +67,7 @@ setup(name = "Electrum",
'electrum.util',
'electrum.account',
'electrum.bitcoin',
'electrum.deserialize',
'electrum.transaction',
'electrum.verifier',
'electrum_gui.gui_gtk',
'electrum_gui.qt_console',

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