def from_pubkey(self, pubkey):
'''Returns a P2PKH address from a public key. The public
key can be serialized as a bytes or a hex string.'''
if isinstance(pubkey, PublicKey):
return self.from_pubkey_hash(hash160(pubkey.to_ser()))
elif isinstance(pubkey, bytes):
return self.from_pubkey_hash(hash160(pubkey))
elif isinstance(pubkey, str):
return self.from_pubkey_hash(hash160(bytes.fromhex(pubkey)))
else:
raise AddressError("wrong type of public key")
def from_pubkey(self, pubkey, coin):
assert isinstance(pubkey, PublicKey)
self.coin = coin
if coin == "BCH":
return self( hash160( pubkey.to_ser() ), coin)
elif coin == "BTC":
return self( hash160( pubkey.to_ser() ), coin)
elif coin == "ETH":
if pubkey.is_compressed():
pubkey.uncompress()
return self( keccak256( pubkey.to_ser()[1:] )[-20:], coin )
else:
AddressError("wrong coin")
def p2sh_unlocking_script(addr,
redeem_script,
pubkeys,
signatures,
var_args=None):
assert isinstance(addr, Address)
assert addr.kind == Constants.CASH_P2SH
assert isinstance(pubkeys[0], PublicKey)
assert isinstance(signatures[0], (bytes, bytearray))
assert isinstance(redeem_script, (bytes, bytearray))
assert hash160(redeem_script) == addr.h
# TODO: parse script
if redeem_script[-1] == OP_CHECKMULTISIG:
dummy = var_args[0]
# Multisig output to unlock
assert redeem_script == multisig_locking_script(
pubkeys, len(signatures))
return (multisig_unlocking_script(signatures, dummy) +
push_data(redeem_script))
elif (len(redeem_script) in [75, 76, 77, 78, 79, 80]) & (
redeem_script[-38] == OP_CHECKLOCKTIMEVERIFY):
# Expiring tip
choice = 'refund'
print("expiring tip: {} !".format(choice))
return (expiring_tip_unlocking_script('refund', signatures[0]) +
push_data(redeem_script))
else:
raise ScriptError("cannot parse script")
def account_from_seed(secret): seed = seed_from_human(secret) public_key = crypto.get_public_key(seed) account = crypto.hash160(public_key) account = account_to_human(account) return account
def generate_keypair(): """ Generate an address and a secret key """ seed = os.urandom(32) public_key = crypto.get_public_key(seed) account = crypto.hash160(public_key) account = address.account_to_human(account) seed = address.seed_to_human(seed) return account, seed
def get_address(self):
"""Get the associated Bitcoin address."""
pubkey = self.get_public_key()
hash = hash160(sha256(pubkey))
return b58c_encode(hash)
def from_script(self, script):
'''Initializes from a redeem script.'''
return self.from_script_hash(hash160(script))
