def address_handlers(cls):
return ScriptPubKey.PayToHandlers(
address=cls.P2PKH_address_from_hash160,
script_hash=cls.P2SH_address_from_hash160,
pubkey=cls.P2PKH_address_from_pubkey,
unspendable=lambda: None,
strange=cls.claim_address_handler,
)
def hashX_from_script(cls, script):
'''Returns a hashX from a script, or None if the script is provably
unspendable so the output can be dropped.
'''
if script and script[0] == OpCodes.OP_RETURN:
return None
# Qtum: make p2pk and p2pkh the same hashX
if (len(script) == 35 and script[0] == 0x21 and script[1] in [2, 3]) \
or (len(script) == 67 and script[0] == 0x41 and script[1] in [4, 6, 7]) \
and script[-1] == OpCodes.OP_CHECKSIG:
pubkey = script[1:-1]
script = ScriptPubKey.P2PKH_script(hash160(pubkey))
return sha256(script).digest()[:HASHX_LEN]
def pay_to_address_script(cls, address):
'''Return a pubkey script that pays to a pubkey hash.
Pass the address (either P2PKH or P2SH) in base58 form.
'''
raw = cls.DECODE_CHECK(address)
# Require version byte(s) plus hash160.
verbyte = -1
verlen = len(raw) - 20
if verlen > 0:
verbyte, hash160 = raw[:verlen], raw[verlen:]
if verbyte == cls.P2PKH_VERBYTE:
return cls.hash160_to_P2PKH_script(hash160)
if verbyte in cls.P2SH_VERBYTES:
return ScriptPubKey.P2SH_script(hash160)
raise CoinError('invalid address: {}'.format(address))
def hash160_to_P2PKH_script(cls, hash160):
return ScriptPubKey.P2PKH_script(hash160)