def test_nonzero_locks(orig_tx, node, relayfee, use_height_lock):
sequence_value = 1
if not use_height_lock:
sequence_value |= SEQUENCE_LOCKTIME_TYPE_FLAG
tx = CTransaction()
tx.nVersion = 2
tx.vin = [
CTxIn(COutPoint(orig_tx.sha256, 0), nSequence=sequence_value)
]
tx.vout = [
CTxOut(int(orig_tx.vout[0].nValue - relayfee * COIN),
CScript([b'a']))
]
bloat_tx(tx)
tx.calc_sha256()
try:
node.sendrawtransaction(ToHex(tx))
except JSONRPCException as exp:
assert_equal(exp.error["message"], NOT_FINAL_ERROR)
assert (orig_tx.hash in node.getrawmempool())
else:
# orig_tx must not be in mempool
assert (orig_tx.hash not in node.getrawmempool())
return tx
def create_transaction(prevtx, n, sig, value, scriptPubKey=CScript()):
tx = CTransaction()
assert (n < len(prevtx.vout))
tx.vin.append(CTxIn(COutPoint(prevtx.sha256, n), sig, 0xffffffff))
tx.vout.append(CTxOut(value, scriptPubKey))
tx.calc_sha256()
# make sure tx is at least MIN_TX_SIZE
bloat_tx(tx)
return tx
def test_bip68_not_consensus(self):
txid = self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 2)
tx1 = FromHex(CTransaction(), self.nodes[0].getrawtransaction(txid))
tx1.rehash()
# Make an anyone-can-spend transaction
tx2 = CTransaction()
tx2.nVersion = 1
tx2.vin = [CTxIn(COutPoint(tx1.sha256, 0), nSequence=0)]
tx2.vout = [
CTxOut(int(tx1.vout[0].nValue - self.relayfee * COIN),
CScript([b'a']))
]
# sign tx2
tx2_raw = self.nodes[0].signrawtransaction(ToHex(tx2))["hex"]
tx2 = FromHex(tx2, tx2_raw)
tx2.rehash()
self.nodes[0].sendrawtransaction(ToHex(tx2))
# Now make an invalid spend of tx2 according to BIP68
sequence_value = 100 # 100 block relative locktime
tx3 = CTransaction()
tx3.nVersion = 2
tx3.vin = [CTxIn(COutPoint(tx2.sha256, 0), nSequence=sequence_value)]
tx3.vout = [
CTxOut(int(tx2.vout[0].nValue - self.relayfee * COIN),
CScript([b'a']))
]
bloat_tx(tx3)
tx3.calc_sha256()
try:
self.nodes[0].sendrawtransaction(ToHex(tx3))
except JSONRPCException as exp:
assert_equal(exp.error["message"], NOT_FINAL_ERROR)
else:
assert (False)
# make a block that violates bip68; ensure that the tip updates
tip = int(self.nodes[0].getbestblockhash(), 16)
block = create_block(
tip,
create_coinbase(absoluteHeight=self.nodes[0].getblockcount() + 1))
block.nVersion = 4
block.vtx.extend([tx1, tx2, tx3])
ltor_sort_block(block)
block.hashMerkleRoot = block.calc_merkle_root()
block.rehash()
block.solve()
self.nodes[0].submitblock(ToHex(block))
assert_equal(self.nodes[0].getbestblockhash(), block.hash)
def get_base_transaction():
# Create the new transaction
tx = CTransaction()
# Spend from one of the spendable outputs
spend = spendable_outputs.popleft()
tx.vin.append(CTxIn(COutPoint(spend.tx.sha256, spend.n)))
# Add spendable outputs
for i in range(4):
tx.vout.append(CTxOut(0, CScript([OP_TRUE])))
spendable_outputs.append(PreviousSpendableOutput(tx, i))
bloat_tx(tx)
return tx
def test_disable_flag(self):
# Create some unconfirmed inputs
new_addr = self.nodes[0].getnewaddress()
self.nodes[0].sendtoaddress(new_addr, 2) # send 2 BTC
utxos = self.nodes[0].listunspent(0, 0)
assert (len(utxos) > 0)
utxo = utxos[0]
tx1 = CTransaction()
value = int(satoshi_round(utxo["amount"] - self.relayfee) * COIN)
# Check that the disable flag disables relative locktime.
# If sequence locks were used, this would require 1 block for the
# input to mature.
sequence_value = SEQUENCE_LOCKTIME_DISABLE_FLAG | 1
tx1.vin = [
CTxIn(COutPoint(int(utxo["txid"], 16), utxo["vout"]),
nSequence=sequence_value)
]
tx1.vout = [CTxOut(value, CScript([b'a']))]
tx1_signed = self.nodes[0].signrawtransaction(ToHex(tx1))["hex"]
tx1_id = self.nodes[0].sendrawtransaction(tx1_signed)
tx1_id = int(tx1_id, 16)
# This transaction will enable sequence-locks, so this transaction should
# fail
tx2 = CTransaction()
tx2.nVersion = 2
sequence_value = sequence_value & 0x7fffffff
tx2.vin = [CTxIn(COutPoint(tx1_id, 0), nSequence=sequence_value)]
tx2.vout = [CTxOut(int(value - self.relayfee * COIN), CScript([b'a']))]
bloat_tx(tx2)
tx2.rehash()
try:
self.nodes[0].sendrawtransaction(ToHex(tx2))
except JSONRPCException as exp:
assert_equal(exp.error["message"], NOT_FINAL_ERROR)
else:
assert (False)
# Setting the version back down to 1 should disable the sequence lock,
# so this should be accepted.
tx2.nVersion = 1
self.nodes[0].sendrawtransaction(ToHex(tx2))
def build_block_with_transactions(self, node, utxo, num_transactions):
block = self.build_block_on_tip(node)
for i in range(num_transactions):
tx = CTransaction()
tx.vin.append(CTxIn(COutPoint(utxo[0], utxo[1]), b''))
tx.vout.append(CTxOut(utxo[2] - 1000, CScript([OP_TRUE])))
bloat_tx(tx)
tx.calc_sha256()
utxo = [tx.sha256, 0, tx.vout[0].nValue]
block.vtx.append(tx)
ltor_sort_block(block)
block.hashMerkleRoot = block.calc_merkle_root()
block.solve()
return block
def create_coinbase(heightAdjust=0, absoluteHeight=None, pubkey=None):
global counter
height = absoluteHeight if absoluteHeight is not None else counter + heightAdjust
coinbase = CTransaction()
coinbase.vin.append(
CTxIn(COutPoint(0, 0xffffffff),
ser_string(serialize_script_num(height)), 0xffffffff))
counter += 1
coinbaseoutput = CTxOut()
coinbaseoutput.nValue = 50 * COIN
halvings = int(height / 150) # regtest
coinbaseoutput.nValue >>= halvings
if (pubkey != None):
coinbaseoutput.scriptPubKey = CScript([pubkey, OP_CHECKSIG])
else:
coinbaseoutput.scriptPubKey = CScript([OP_TRUE])
coinbase.vout = [coinbaseoutput]
# make sure tx is at least MIN_TX_SIZE
bloat_tx(coinbase)
coinbase.calc_sha256()
return coinbase