107 lines
4.0 KiB
Python
107 lines
4.0 KiB
Python
from binascii import hexlify, unhexlify
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import re
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import struct
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from sha3 import keccak_256
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from . import base58
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from . import numbers
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_ADDR_REGEX = re.compile(r'^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{95}$')
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_IADDR_REGEX = re.compile(r'^[123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz]{106}$')
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class Address(object):
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_valid_netbytes = (18, 53)
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# NOTE: _valid_netbytes order is (real, testnet)
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def __init__(self, address):
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address = str(address)
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if not _ADDR_REGEX.match(address):
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raise ValueError("Address must be 95 characters long base58-encoded string, "
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"is {addr} ({len} chars length)".format(addr=address, len=len(address)))
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self._decode(address)
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def _decode(self, address):
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self._decoded = bytearray(unhexlify(base58.decode(address)))
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checksum = self._decoded[-4:]
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if checksum != keccak_256(self._decoded[:-4]).digest()[:4]:
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raise ValueError("Invalid checksum")
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if self._decoded[0] not in self._valid_netbytes:
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raise ValueError("Invalid address netbyte {nb}. Allowed values are: {allowed}".format(
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nb=self._decoded[0],
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allowed=", ".join(map(lambda b: '%02x' % b, self._valid_netbytes))))
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def is_testnet(self):
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return self._decoded[0] == self._valid_netbytes[1]
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def get_view_key(self):
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return hexlify(self._decoded[33:65]).decode()
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def get_spend_key(self):
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return hexlify(self._decoded[1:33]).decode()
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def with_payment_id(self, payment_id=0):
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payment_id = numbers.PaymentID(payment_id)
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if not payment_id.is_short():
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raise TypeError("Integrated payment ID {0} has more than 64 bits".format(payment_id))
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prefix = 54 if self.is_testnet() else 19
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data = bytearray([prefix]) + self._decoded[1:65] + struct.pack('>Q', int(payment_id))
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checksum = bytearray(keccak_256(data).digest()[:4])
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return IntegratedAddress(base58.encode(hexlify(data + checksum)))
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def __repr__(self):
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return base58.encode(hexlify(self._decoded))
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def __eq__(self, other):
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if isinstance(other, Address):
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return str(self) == str(other)
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if isinstance(other, str):
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return str(self) == other
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return super()
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class SubAddress(Address):
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_valid_netbytes = (42, 63)
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def with_payment_id(self):
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raise TypeError("SubAddress cannot be integrated with payment ID")
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class IntegratedAddress(Address):
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_valid_netbytes = (19, 54)
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def __init__(self, address):
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address = str(address)
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if not _IADDR_REGEX.match(address):
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raise ValueError("Integrated address must be 106 characters long base58-encoded string, "
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"is {addr} ({len} chars length)".format(addr=address, len=len(address)))
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self._decode(address)
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def get_payment_id(self):
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return numbers.PaymentID(hexlify(self._decoded[65:-4]).decode())
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def get_base_address(self):
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prefix = 53 if self.is_testnet() else 18
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data = bytearray([prefix]) + self._decoded[1:65]
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checksum = keccak_256(data).digest()[:4]
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return Address(base58.encode(hexlify(data + checksum)))
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def address(addr):
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addr = str(addr)
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if _ADDR_REGEX.match(addr):
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netbyte = bytearray(unhexlify(base58.decode(addr)))[0]
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if netbyte in Address._valid_netbytes:
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return Address(addr)
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elif netbyte in SubAddress._valid_netbytes:
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return SubAddress(addr)
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raise ValueError("Invalid address netbyte {nb}. Allowed values are: {allowed}".format(
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nb=hexlify(chr(netbyte)),
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allowed=", ".join(map(
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lambda b: '%02x' % b,
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sorted(Address._valid_netbytes + SubAddress._valid_netbytes)))))
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elif _IADDR_REGEX.match(addr):
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return IntegratedAddress(addr)
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raise ValueError("Address must be either 95 or 106 characters long base58-encoded string, "
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"is {addr} ({len} chars length)".format(addr=address, len=len(address)))
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