You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
87 lines
2.8 KiB
87 lines
2.8 KiB
#!/usr/bin/env python3 |
|
# Copyright (c) 2016 The Bitcoin Core developers |
|
# Distributed under the MIT software license, see the accompanying |
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
|
"""Encode and decode BASE58, P2PKH and P2SH addresses.""" |
|
|
|
from .script import hash256, hash160, sha256, CScript, OP_0 |
|
from .util import bytes_to_hex_str, hex_str_to_bytes |
|
|
|
from . import segwit_addr |
|
|
|
chars = '123456789ABCDEFGHJKLMNPQRSTUVWXYZabcdefghijkmnopqrstuvwxyz' |
|
|
|
def byte_to_base58(b, version): |
|
result = '' |
|
str = bytes_to_hex_str(b) |
|
str = bytes_to_hex_str(chr(version).encode('latin-1')) + str |
|
checksum = bytes_to_hex_str(hash256(hex_str_to_bytes(str))) |
|
str += checksum[:8] |
|
value = int('0x'+str,0) |
|
while value > 0: |
|
result = chars[value % 58] + result |
|
value //= 58 |
|
while (str[:2] == '00'): |
|
result = chars[0] + result |
|
str = str[2:] |
|
return result |
|
|
|
# TODO: def base58_decode |
|
|
|
def keyhash_to_p2pkh(hash, main = False): |
|
assert (len(hash) == 20) |
|
version = 0 if main else 111 |
|
return byte_to_base58(hash, version) |
|
|
|
def scripthash_to_p2sh(hash, main = False): |
|
assert (len(hash) == 20) |
|
version = 5 if main else 196 |
|
return byte_to_base58(hash, version) |
|
|
|
def key_to_p2pkh(key, main = False): |
|
key = check_key(key) |
|
return keyhash_to_p2pkh(hash160(key), main) |
|
|
|
def script_to_p2sh(script, main = False): |
|
script = check_script(script) |
|
return scripthash_to_p2sh(hash160(script), main) |
|
|
|
def key_to_p2sh_p2wpkh(key, main = False): |
|
key = check_key(key) |
|
p2shscript = CScript([OP_0, hash160(key)]) |
|
return script_to_p2sh(p2shscript, main) |
|
|
|
def program_to_witness(version, program, main = False): |
|
if (type(program) is str): |
|
program = hex_str_to_bytes(program) |
|
assert 0 <= version <= 16 |
|
assert 2 <= len(program) <= 40 |
|
assert version > 0 or len(program) in [20, 32] |
|
return segwit_addr.encode("bc" if main else "bcrt", version, program) |
|
|
|
def script_to_p2wsh(script, main = False): |
|
script = check_script(script) |
|
return program_to_witness(0, sha256(script), main) |
|
|
|
def key_to_p2wpkh(key, main = False): |
|
key = check_key(key) |
|
return program_to_witness(0, hash160(key), main) |
|
|
|
def script_to_p2sh_p2wsh(script, main = False): |
|
script = check_script(script) |
|
p2shscript = CScript([OP_0, sha256(script)]) |
|
return script_to_p2sh(p2shscript, main) |
|
|
|
def check_key(key): |
|
if (type(key) is str): |
|
key = hex_str_to_bytes(key) # Assuming this is hex string |
|
if (type(key) is bytes and (len(key) == 33 or len(key) == 65)): |
|
return key |
|
assert(False) |
|
|
|
def check_script(script): |
|
if (type(script) is str): |
|
script = hex_str_to_bytes(script) # Assuming this is hex string |
|
if (type(script) is bytes or type(script) is CScript): |
|
return script |
|
assert(False)
|
|
|