150 lines
5.1 KiB
Python
150 lines
5.1 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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"""Encode and decode BASE58, P2PKH and P2SH addresses."""
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import enum
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import unittest
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from .script import hash256, hash160, sha256, CScript, OP_0
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from .util import hex_str_to_bytes
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from . import segwit_addr
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from test_framework.util import assert_equal
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ADDRESS_BCRT1_UNSPENDABLE = 'bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj'
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ADDRESS_BCRT1_UNSPENDABLE_DESCRIPTOR = 'addr(bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj)#juyq9d97'
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# Coins sent to this address can be spent with a witness stack of just OP_TRUE
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ADDRESS_BCRT1_P2WSH_OP_TRUE = 'bcrt1qft5p2uhsdcdc3l2ua4ap5qqfg4pjaqlp250x7us7a8qqhrxrxfsqseac85'
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class AddressType(enum.Enum):
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bech32 = 'bech32'
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p2sh_segwit = 'p2sh-segwit'
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legacy = 'legacy' # P2PKH
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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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str = b.hex()
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str = chr(version).encode('latin-1').hex() + str
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checksum = hash256(hex_str_to_bytes(str)).hex()
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str += checksum[:8]
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value = int('0x'+str,0)
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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 (str[:2] == '00'):
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result = chars[0] + result
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str = str[2:]
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return result
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def base58_to_byte(s, verify_checksum=True):
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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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if verify_checksum:
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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 = 0 if main else 111
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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 = 5 if main else 196
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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 key_to_p2sh_p2wpkh(key, main = False):
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key = check_key(key)
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p2shscript = CScript([OP_0, hash160(key)])
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return script_to_p2sh(p2shscript, main)
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def program_to_witness(version, program, main = False):
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if (type(program) is str):
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program = hex_str_to_bytes(program)
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assert 0 <= version <= 16
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assert 2 <= len(program) <= 40
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assert version > 0 or len(program) in [20, 32]
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return segwit_addr.encode("bc" if main else "bcrt", version, program)
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def script_to_p2wsh(script, main = False):
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script = check_script(script)
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return program_to_witness(0, sha256(script), main)
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def key_to_p2wpkh(key, main = False):
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key = check_key(key)
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return program_to_witness(0, hash160(key), main)
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def script_to_p2sh_p2wsh(script, main = False):
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script = check_script(script)
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p2shscript = CScript([OP_0, sha256(script)])
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return script_to_p2sh(p2shscript, main)
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def check_key(key):
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if (type(key) is str):
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key = hex_str_to_bytes(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 = hex_str_to_bytes(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(b'\x1f\x8e\xa1p*{\xd4\x94\x1b\xca\tA\xb8R\xc4\xbb\xfe\xdb.\x05', 111)
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check_base58(b':\x0b\x05\xf4\xd7\xf6l;\xa7\x00\x9fE50)l\x84\\\xc9\xcf', 111)
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check_base58(b'A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 111)
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check_base58(b'\0A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 111)
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check_base58(b'\0\0A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 111)
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check_base58(b'\0\0\0A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 111)
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check_base58(b'\x1f\x8e\xa1p*{\xd4\x94\x1b\xca\tA\xb8R\xc4\xbb\xfe\xdb.\x05', 0)
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check_base58(b':\x0b\x05\xf4\xd7\xf6l;\xa7\x00\x9fE50)l\x84\\\xc9\xcf', 0)
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check_base58(b'A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 0)
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check_base58(b'\0A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 0)
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check_base58(b'\0\0A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 0)
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check_base58(b'\0\0\0A\xc1\xea\xf1\x11\x80%Y\xba\xd6\x1b`\xd6+\x1f\x89|c\x92\x8a', 0)
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