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100 lines
2.9 KiB
100 lines
2.9 KiB
#!/usr/bin/env python3
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# Copyright (c) 2016-2019 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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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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ADDRESS_BCRT1_UNSPENDABLE = 'bcrt1qqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqqq3xueyj'
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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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# TODO: def base58_decode
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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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