def is_mnemonic_checksum_valid(mnemonic,
language='english',
word_list_dir=None,
word_list=None):
if word_list is None:
word_list = load_word_list(language, word_list_dir)
elif not isinstance(word_list, list) or len(word_list) != 2048:
raise TypeError("invalid word list type")
mnemonic = mnemonic.split()
word_count = len(mnemonic)
if word_count not in [12, 15, 18, 21, 24]:
raise ValueError(
'Number of words must be one of the following: [12, 15, 18, 21, 24]'
)
codes = {w: c for c, w in enumerate(word_list)}
entropy_int = 0
bit_size = word_count * 11
chk_sum_bit_len = word_count * 11 % 32
for w in mnemonic:
entropy_int = (entropy_int << 11) | codes[w]
chk_sum = entropy_int & (2**chk_sum_bit_len - 1)
entropy_int = entropy_int >> chk_sum_bit_len
entropy = entropy_int.to_bytes((bit_size - chk_sum_bit_len) // 8,
byteorder="big")
if (sha256(entropy)[0] >> (8 - chk_sum_bit_len)) != chk_sum:
return False
return True
def entropy_to_mnemonic(entropy, language='english', word_list_dir=None, word_list=None):
"""
Convert entropy to mnemonic words string.
:param str,bytes entropy: random entropy HEX encoded or bytes string.
:param str language: (optional) uses word list language (chinese_simplified, chinese_traditional, english, french,
italian, japanese, korean, spanish), by default is english.
:param str word_list_dir: (optional) path to a directory containing a list of words,
by default None (use BIP39 standard list)
:param list word_list: (optional) already loaded word list, by default None
:return: mnemonic words string.
"""
if isinstance(entropy, str):
entropy = bytes.fromhex(entropy)
if not isinstance(entropy, bytes):
raise TypeError("entropy should be bytes or hex encoded string")
if len(entropy) not in [16, 20, 24, 28, 32]:
raise ValueError(
'entropy length should be one of the following: [16, 20, 24, 28, 32]')
if word_list is None:
word_list = load_word_list(language, word_list_dir)
elif not isinstance(word_list, list) or len(word_list) != 2048:
raise TypeError("invalid word list type")
i = int.from_bytes(entropy, byteorder="big")
# append checksum
b = len(entropy) * 8 // 32
i = (i << b) | (sha256(entropy)[0] >> (8 - b))
return " ".join([word_list[i.__rshift__(((d - 1) * 11)) & 2047]
for d in range(int((len(entropy) * 8 + 8) // 11), 0, -1)])
def script_to_hash(script, witness=False, hex=True):
"""
Encode script to hash HASH160 or SHA256 in dependency of the witness.
:param script: script in bytes or HEX encoded string.
:param witness: (optional) If set to True return SHA256 hash for P2WSH, by default is False.
:param hex: (optional) If set to True return key in HEX format, by default is True.
:param sub_script: sub_script which is necessary to remove from target script in bytes or HEX encoded string.
:return: script in bytes or HEX encoded string corresponding to the format of target script.
"""
script = get_bytes(script)
return sha256(script, hex) if witness else hash160(script, hex)
def __init__(self, script, testnet=False, witness_version=0):
self.witness_version = witness_version
self.testnet = testnet
if isinstance(script, str):
script = bytes.fromhex(script)
self.script = script
self.script_hex = self.script.hex()
if witness_version is None:
self.hash = hash160(self.script)
else:
self.hash = sha256(self.script)
self.script_opcodes = decode_script(self.script)
self.script_opcodes_asm = decode_script(self.script, 1)
self.address = hash_to_address(self.hash,
script_hash=True,
witness_version=self.witness_version,
testnet=self.testnet)
def mnemonic_to_entropy(mnemonic,
language='english',
word_list_dir=None,
word_list=None,
hex=True,
checksum=True):
"""
Converting mnemonic words to entropy.
:param str mnemonic: mnemonic words string (space separated)
:param str language: (optional) uses word list language (chinese_simplified, chinese_traditional, english, french,
italian, japanese, korean, spanish), by default is english.
:param str word_list_dir: (optional) path to a directory containing a list of words,
by default None (use BIP39 standard list)
:param list word_list: (optional) already loaded word list, by default None
:param boolean hex: return HEX encoded string result flag, by default True.
:return: bytes string.
"""
if word_list is None:
word_list = load_word_list(language, word_list_dir)
elif not isinstance(word_list, list) or len(word_list) != 2048:
raise TypeError("invalid word list type")
mnemonic = mnemonic.split()
word_count = len(mnemonic)
if word_count not in [12, 15, 18, 21, 24]:
raise ValueError(
'Number of words must be one of the following: [12, 15, 18, 21, 24]'
)
codes = {w: c for c, w in enumerate(word_list)}
entropy_int = 0
bit_size = word_count * 11
chk_sum_bit_len = word_count * 11 % 32
for w in mnemonic:
entropy_int = (entropy_int << 11) | codes[w]
chk_sum = entropy_int & (2**chk_sum_bit_len - 1)
entropy_int = entropy_int >> chk_sum_bit_len
entropy = entropy_int.to_bytes((bit_size - chk_sum_bit_len) // 8,
byteorder="big")
if checksum:
if (sha256(entropy)[0] >> (8 - chk_sum_bit_len)) != chk_sum:
raise ValueError("invalid mnemonic checksum")
return entropy if not hex else entropy.hex()
def __sign_p2sh_p2wsh_multisig(self, n, private_key, public_key,
redeem_script, sighash_type, amount):
self["segwit"] = True
script_code = int_to_var_int(len(redeem_script)) + redeem_script
sighash = self.sig_hash_segwit(n, amount, script_pub_key=script_code, sighash_type=sighash_type)
sighash = bytes.fromhex(sighash) if isinstance(sighash, str) else sighash
sig = [sign_message(sighash, p, 0) + bytes([sighash_type]) for p in private_key]
self["vIn"][n]['signatures'] = [s if self["format"] == "raw" else s.hex() for s in sig]
if "txInWitness" not in self["vIn"][n]:
self["vIn"][n]["txInWitness"] = []
witness = self.__get_multisig_script_sig__(self["vIn"][n]["txInWitness"],
public_key,
sig,
script_code,
redeem_script,
n,
amount)
if self["format"] == "raw":
self["vIn"][n]['txInWitness'] = list(witness)
else:
self["vIn"][n]["txInWitness"] = list([w.hex() for w in witness])
# calculate P2SH redeem script from P2WSH redeem script
return op_push_data(b"\x00" + op_push_data(sha256(redeem_script)))