wownero-python/monero/address.py
2018-01-28 21:00:24 +01:00

159 lines
5.4 KiB
Python

from binascii import hexlify, unhexlify
import re
import struct
from sha3 import keccak_256
from . import base58
from . import numbers
_ADDR_REGEX = re.compile(r'^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{95}$')
_IADDR_REGEX = re.compile(r'^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{106}$')
class Address(object):
"""Monero address.
Address of this class is the master address for a wallet.
:param address: a Monero address as string-like object
:param label: a label for the address (defaults to `None`)
"""
label = None
_valid_netbytes = (18, 53)
# NOTE: _valid_netbytes order is (real, testnet)
def __init__(self, address, label=None):
address = str(address)
if not _ADDR_REGEX.match(address):
raise ValueError("Address must be 95 characters long base58-encoded string, "
"is {addr} ({len} chars length)".format(addr=address, len=len(address)))
self._decode(address)
self.label = label or self.label
def _decode(self, address):
self._decoded = bytearray(unhexlify(base58.decode(address)))
checksum = self._decoded[-4:]
if checksum != keccak_256(self._decoded[:-4]).digest()[:4]:
raise ValueError("Invalid checksum")
if self._decoded[0] not in self._valid_netbytes:
raise ValueError("Invalid address netbyte {nb}. Allowed values are: {allowed}".format(
nb=self._decoded[0],
allowed=", ".join(map(lambda b: '%02x' % b, self._valid_netbytes))))
def is_testnet(self):
"""Returns `True` if the address belongs to testnet.
:rtype: bool
"""
return self._decoded[0] == self._valid_netbytes[1]
def view_key(self):
"""Returns public view key.
:rtype: str
"""
return hexlify(self._decoded[33:65]).decode()
def spend_key(self):
"""Returns public spend key.
:rtype: str
"""
return hexlify(self._decoded[1:33]).decode()
def with_payment_id(self, payment_id=0):
"""Integrates payment id into the address.
:param payment_id: int, hexadecimal string or PaymentID (max 64-bit long)
:rtype: IntegratedAddress
:raises: TypeError if the payment id is too long
"""
payment_id = numbers.PaymentID(payment_id)
if not payment_id.is_short():
raise TypeError("Payment ID {0} has more than 64 bits and cannot be integrated".format(payment_id))
prefix = 54 if self.is_testnet() else 19
data = bytearray([prefix]) + self._decoded[1:65] + struct.pack('>Q', int(payment_id))
checksum = bytearray(keccak_256(data).digest()[:4])
return IntegratedAddress(base58.encode(hexlify(data + checksum)))
def __repr__(self):
return base58.encode(hexlify(self._decoded))
def __eq__(self, other):
if isinstance(other, Address):
return str(self) == str(other)
if isinstance(other, str):
return str(self) == other
return super()
class SubAddress(Address):
"""Monero subaddress.
Any type of wallet address which is not the master one.
"""
_valid_netbytes = (42, 63)
def with_payment_id(self, _):
raise TypeError("SubAddress cannot be integrated with payment ID")
class IntegratedAddress(Address):
"""Monero integrated address.
A master address integrated with payment id (short one, max 64 bit).
"""
_valid_netbytes = (19, 54)
def __init__(self, address):
address = str(address)
if not _IADDR_REGEX.match(address):
raise ValueError("Integrated address must be 106 characters long base58-encoded string, "
"is {addr} ({len} chars length)".format(addr=address, len=len(address)))
self._decode(address)
def payment_id(self):
"""Returns the integrated payment id.
:rtype: PaymentID
"""
return numbers.PaymentID(hexlify(self._decoded[65:-4]).decode())
def base_address(self):
"""Returns the base address without payment id.
:rtype: Address
"""
prefix = 53 if self.is_testnet() else 18
data = bytearray([prefix]) + self._decoded[1:65]
checksum = keccak_256(data).digest()[:4]
return Address(base58.encode(hexlify(data + checksum)))
def address(addr, label=None):
"""Discover the proper class and return instance for a given Monero address.
:param addr: the address as a string-like object
:param label: a label for the address (defaults to `None`)
:rtype: Address, SubAddress or IntegratedAddress
"""
addr = str(addr)
if _ADDR_REGEX.match(addr):
netbyte = bytearray(unhexlify(base58.decode(addr)))[0]
if netbyte in Address._valid_netbytes:
return Address(addr, label=label)
elif netbyte in SubAddress._valid_netbytes:
return SubAddress(addr, label=label)
raise ValueError("Invalid address netbyte {nb}. Allowed values are: {allowed}".format(
nb=hexlify(chr(netbyte)),
allowed=", ".join(map(
lambda b: '%02x' % b,
sorted(Address._valid_netbytes + SubAddress._valid_netbytes)))))
elif _IADDR_REGEX.match(addr):
return IntegratedAddress(addr)
raise ValueError("Address must be either 95 or 106 characters long base58-encoded string, "
"is {addr} ({len} chars length)".format(addr=address, len=len(address)))