def expiring_tip_locking_script(locktime, claim_pubkey, refund_pubkey):
assert (locktime < 0x100000000)
assert isinstance(claim_pubkey, PublicKey)
assert isinstance(refund_pubkey, PublicKey)
assert (claim_pubkey.is_compressed()
& refund_pubkey.is_compressed()), "public keys must be compressed"
return (bytes([OP_IF]) + push_data(claim_pubkey.to_ser()) +
bytes([OP_ELSE]) + push_data(script_number(locktime)) +
bytes([OP_CHECKLOCKTIMEVERIFY, OP_DROP]) +
push_data(refund_pubkey.to_ser()) + bytes([OP_ENDIF, OP_CHECKSIG]))
def nulldata_script(data):
''' Data (temporary: int, bytes and str) '''
script = bytes([OP_RETURN])
for d in data:
if isinstance(d, int):
script += push_data(script_number(d))
elif isinstance(d, bytes):
script += push_data(d)
elif isinstance(d, str):
script += push_data(d.encode('utf-8'))
else:
NullDataError("cannot serialize nulldata script")
return script
def nulldata_script(data):
''' Data (temporary: int, bytes and str) '''
for i, d in enumerate(data):
if isinstance(d, Address):
data[i] = d.h
elif isinstance(d, PublicKey):
data[i] = d.to_ser(strtype=False)
script = bytes([OP_RETURN])
for d in data:
if isinstance(d, int):
script += push_data(script_number(d))
elif isinstance(d, bytes):
script += push_data(d)
elif isinstance(d, str):
script += push_data(d.encode('utf-8'))
else:
ScriptError("cannot serialize nulldata script")
return script
def simple_sequence_locking_script(sequence):
''' Simple anyone-can-spend CHECKSEQUENCEVERIFY locking script. '''
assert not (sequence & Constants.SEQUENCE_LOCKTIME_DISABLE_FLAG)
return (push_data(script_number(sequence)) +
bytes([OP_CHECKSEQUENCEVERIFY, OP_DROP]))
def simple_locktime_locking_script(locktime):
''' Simple anyone-can-spend CHECKLOCKTIMEVERIFY locking script. '''
return (push_data(script_number(locktime)) +
bytes([OP_CHECKLOCKTIMEVERIFY, OP_DROP]))