def getTxStateLockScript(T: int, delta: int, pubkey_pay_right: PublicKey,
pubkey_mulsig_left: PublicKey, pubkey_mulsig_right: PublicKey) -> Script:
"""
tx_state lock script encodes possibilities to either refund locked coins to left or pay to right
:param T: locked funds can pe paid after this time wherever right user wants
:param delta: upper bound on time for transaction to be confirmed by the network
:param pubkey_pay_right: public key owned by right user for payment after time T
:param pubkey_mulsig_left: public key owned by left user for refund if enable-refund tx is published
:param pubkey_mulsig_right: public key owned by right user for refund if enable-refund tx is published
:return: tx_state lock script
"""
# signature script:
# - for refund (with enable-refund tx + ∆): "OP_0 <left_signature> <right_signature>"
# - for payment (time() >= T): "<signature_right> <pubkey_right> OP_0 OP_0 OP_0 OP_0 OP_0 OP_0"
lock_script = Script([
'OP_2', pubkey_mulsig_left.to_hex(), pubkey_mulsig_right.to_hex(), 'OP_2', 'OP_CHECKMULTISIG',
'OP_IF',
delta, 'OP_CHECKSEQUENCEVERIFY', 'OP_DROP', 'OP_TRUE', # check if refund and lock for ∆
'OP_ELSE',
T, 'OP_CHECKLOCKTIMEVERIFY', 'OP_DROP', 'OP_DUP', 'OP_HASH160', pubkey_pay_right.to_hash160(), 'OP_EQUALVERIFY', 'OP_CHECKSIG', # check if payment
'OP_ENDIF'
])
return lock_script
def test_pubkey_uncompressed(self):
pub = PublicKey(self.public_key_hex)
self.assertEqual(pub.to_hex(compressed=False), self.public_key_hex)