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120 lines
3.9 KiB
Python
120 lines
3.9 KiB
Python
#!/usr/bin/env python3
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# Copyright (c) 2016-2020 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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#
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# address.py
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#
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# This file encodes and decodes BASE58 P2PKH and P2SH addresses
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#
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import unittest
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from .script import hash160, hash256, CScript
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from .util import assert_equal
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# Note unlike in bitcoin, this address isn't bech32 since we don't (at this time) support bech32.
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ADDRESS_BCRT1_UNSPENDABLE = 'yVg3NBUHNEhgDceqwVUjsZHreC5PBHnUo9'
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ADDRESS_BCRT1_UNSPENDABLE_DESCRIPTOR = 'addr(yVg3NBUHNEhgDceqwVUjsZHreC5PBHnUo9)#e5kt0jtk'
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ADDRESS_BCRT1_P2SH_OP_TRUE = '8zJctvfrzGZ5s1zQ3kagwyW1DsPYSQ4V2P'
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chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz'
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def byte_to_base58(b, version):
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result = ''
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b = bytes([version]) + b # prepend version
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b += hash256(b)[:4] # append checksum
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value = int.from_bytes(b, 'big')
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while value > 0:
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result = chars[value % 58] + result
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value //= 58
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while b[0] == 0:
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result = chars[0] + result
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b = b[1:]
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return result
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def base58_to_byte(s):
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"""Converts a base58-encoded string to its data and version.
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Throws if the base58 checksum is invalid."""
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if not s:
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return b''
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n = 0
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for c in s:
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n *= 58
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assert c in chars
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digit = chars.index(c)
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n += digit
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h = '%x' % n
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if len(h) % 2:
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h = '0' + h
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res = n.to_bytes((n.bit_length() + 7) // 8, 'big')
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pad = 0
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for c in s:
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if c == chars[0]:
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pad += 1
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else:
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break
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res = b'\x00' * pad + res
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# Assert if the checksum is invalid
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assert_equal(hash256(res[:-4])[:4], res[-4:])
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return res[1:-4], int(res[0])
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def keyhash_to_p2pkh(hash, main=False):
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assert len(hash) == 20
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version = 76 if main else 140
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return byte_to_base58(hash, version)
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def scripthash_to_p2sh(hash, main=False):
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assert len(hash) == 20
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version = 16 if main else 19
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return byte_to_base58(hash, version)
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def key_to_p2pkh(key, main=False):
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key = check_key(key)
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return keyhash_to_p2pkh(hash160(key), main)
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def script_to_p2sh(script, main=False):
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script = check_script(script)
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return scripthash_to_p2sh(hash160(script), main)
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def check_key(key):
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if (type(key) is str):
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key = bytes.fromhex(key) # Assuming this is hex string
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if (type(key) is bytes and (len(key) == 33 or len(key) == 65)):
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return key
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assert False
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def check_script(script):
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if (type(script) is str):
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script = bytes.fromhex(script) # Assuming this is hex string
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if (type(script) is bytes or type(script) is CScript):
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return script
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assert False
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class TestFrameworkScript(unittest.TestCase):
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def test_base58encodedecode(self):
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def check_base58(data, version):
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self.assertEqual(base58_to_byte(byte_to_base58(data, version)), (data, version))
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check_base58(bytes.fromhex('1f8ea1702a7bd4941bca0941b852c4bbfedb2e05'), 111)
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check_base58(bytes.fromhex('3a0b05f4d7f66c3ba7009f453530296c845cc9cf'), 111)
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check_base58(bytes.fromhex('41c1eaf111802559bad61b60d62b1f897c63928a'), 111)
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check_base58(bytes.fromhex('0041c1eaf111802559bad61b60d62b1f897c63928a'), 111)
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check_base58(bytes.fromhex('000041c1eaf111802559bad61b60d62b1f897c63928a'), 111)
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check_base58(bytes.fromhex('00000041c1eaf111802559bad61b60d62b1f897c63928a'), 111)
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check_base58(bytes.fromhex('1f8ea1702a7bd4941bca0941b852c4bbfedb2e05'), 0)
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check_base58(bytes.fromhex('3a0b05f4d7f66c3ba7009f453530296c845cc9cf'), 0)
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check_base58(bytes.fromhex('41c1eaf111802559bad61b60d62b1f897c63928a'), 0)
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check_base58(bytes.fromhex('0041c1eaf111802559bad61b60d62b1f897c63928a'), 0)
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check_base58(bytes.fromhex('000041c1eaf111802559bad61b60d62b1f897c63928a'), 0)
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check_base58(bytes.fromhex('00000041c1eaf111802559bad61b60d62b1f897c63928a'), 0)
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