mirror of
https://github.com/bitcoin/bitcoin.git
synced 2024-11-20 10:38:42 +01:00
215 lines
8.8 KiB
Python
Executable File
215 lines
8.8 KiB
Python
Executable File
#!/usr/bin/env python3
|
|
# Copyright (c) 2015-2020 The Bitcoin Core developers
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
"""Test BIP65 (CHECKLOCKTIMEVERIFY).
|
|
|
|
Test that the CHECKLOCKTIMEVERIFY soft-fork activates at (regtest) block height
|
|
1351.
|
|
"""
|
|
|
|
from test_framework.blocktools import (
|
|
create_block,
|
|
create_coinbase,
|
|
create_transaction,
|
|
)
|
|
from test_framework.messages import (
|
|
CTransaction,
|
|
ToHex,
|
|
msg_block,
|
|
)
|
|
from test_framework.p2p import P2PInterface
|
|
from test_framework.script import (
|
|
CScript,
|
|
CScriptNum,
|
|
OP_1NEGATE,
|
|
OP_CHECKLOCKTIMEVERIFY,
|
|
OP_DROP,
|
|
)
|
|
from test_framework.test_framework import BitcoinTestFramework
|
|
from test_framework.util import (
|
|
assert_equal,
|
|
hex_str_to_bytes,
|
|
)
|
|
|
|
from io import BytesIO
|
|
|
|
CLTV_HEIGHT = 1351
|
|
|
|
|
|
# Helper function to modify a transaction by
|
|
# 1) prepending a given script to the scriptSig of vin 0 and
|
|
# 2) (optionally) modify the nSequence of vin 0 and the tx's nLockTime
|
|
def cltv_modify_tx(node, tx, prepend_scriptsig, nsequence=None, nlocktime=None):
|
|
if nsequence is not None:
|
|
tx.vin[0].nSequence = nsequence
|
|
tx.nLockTime = nlocktime
|
|
|
|
# Need to re-sign, since nSequence and nLockTime changed
|
|
signed_result = node.signrawtransactionwithwallet(ToHex(tx))
|
|
new_tx = CTransaction()
|
|
new_tx.deserialize(BytesIO(hex_str_to_bytes(signed_result['hex'])))
|
|
else:
|
|
new_tx = tx
|
|
|
|
new_tx.vin[0].scriptSig = CScript(prepend_scriptsig + list(CScript(new_tx.vin[0].scriptSig)))
|
|
return new_tx
|
|
|
|
|
|
def cltv_invalidate(node, tx, failure_reason):
|
|
# Modify the signature in vin 0 and nSequence/nLockTime of the tx to fail CLTV
|
|
#
|
|
# According to BIP65, OP_CHECKLOCKTIMEVERIFY can fail due the following reasons:
|
|
# 1) the stack is empty
|
|
# 2) the top item on the stack is less than 0
|
|
# 3) the lock-time type (height vs. timestamp) of the top stack item and the
|
|
# nLockTime field are not the same
|
|
# 4) the top stack item is greater than the transaction's nLockTime field
|
|
# 5) the nSequence field of the txin is 0xffffffff
|
|
assert failure_reason in range(5)
|
|
scheme = [
|
|
# | Script to prepend to scriptSig | nSequence | nLockTime |
|
|
# +-------------------------------------------------+------------+--------------+
|
|
[[OP_CHECKLOCKTIMEVERIFY], None, None],
|
|
[[OP_1NEGATE, OP_CHECKLOCKTIMEVERIFY, OP_DROP], None, None],
|
|
[[CScriptNum(1000), OP_CHECKLOCKTIMEVERIFY, OP_DROP], 0, 1296688602], # timestamp of genesis block
|
|
[[CScriptNum(1000), OP_CHECKLOCKTIMEVERIFY, OP_DROP], 0, 500],
|
|
[[CScriptNum(500), OP_CHECKLOCKTIMEVERIFY, OP_DROP], 0xffffffff, 500],
|
|
][failure_reason]
|
|
|
|
return cltv_modify_tx(node, tx, prepend_scriptsig=scheme[0], nsequence=scheme[1], nlocktime=scheme[2])
|
|
|
|
|
|
def cltv_validate(node, tx, height):
|
|
# Modify the signature in vin 0 and nSequence/nLockTime of the tx to pass CLTV
|
|
scheme = [[CScriptNum(height), OP_CHECKLOCKTIMEVERIFY, OP_DROP], 0, height]
|
|
|
|
return cltv_modify_tx(node, tx, prepend_scriptsig=scheme[0], nsequence=scheme[1], nlocktime=scheme[2])
|
|
|
|
|
|
class BIP65Test(BitcoinTestFramework):
|
|
def set_test_params(self):
|
|
self.num_nodes = 1
|
|
self.extra_args = [[
|
|
'-whitelist=noban@127.0.0.1',
|
|
'-par=1', # Use only one script thread to get the exact reject reason for testing
|
|
'-acceptnonstdtxn=1', # cltv_invalidate is nonstandard
|
|
]]
|
|
self.setup_clean_chain = True
|
|
self.rpc_timeout = 480
|
|
|
|
def skip_test_if_missing_module(self):
|
|
self.skip_if_no_wallet()
|
|
|
|
def test_cltv_info(self, *, is_active):
|
|
assert_equal(self.nodes[0].getblockchaininfo()['softforks']['bip65'], {
|
|
"active": is_active,
|
|
"height": CLTV_HEIGHT,
|
|
"type": "buried",
|
|
},
|
|
)
|
|
|
|
def run_test(self):
|
|
peer = self.nodes[0].add_p2p_connection(P2PInterface())
|
|
|
|
self.test_cltv_info(is_active=False)
|
|
|
|
self.log.info("Mining %d blocks", CLTV_HEIGHT - 2)
|
|
self.coinbase_txids = [self.nodes[0].getblock(b)['tx'][0] for b in self.nodes[0].generate(CLTV_HEIGHT - 2)]
|
|
self.nodeaddress = self.nodes[0].getnewaddress()
|
|
|
|
self.log.info("Test that invalid-according-to-CLTV transactions can still appear in a block")
|
|
|
|
# create one invalid tx per CLTV failure reason (5 in total) and collect them
|
|
invalid_ctlv_txs = []
|
|
for i in range(5):
|
|
spendtx = create_transaction(self.nodes[0], self.coinbase_txids[i],
|
|
self.nodeaddress, amount=1.0)
|
|
spendtx = cltv_invalidate(self.nodes[0], spendtx, i)
|
|
spendtx.rehash()
|
|
invalid_ctlv_txs.append(spendtx)
|
|
|
|
tip = self.nodes[0].getbestblockhash()
|
|
block_time = self.nodes[0].getblockheader(tip)['mediantime'] + 1
|
|
block = create_block(int(tip, 16), create_coinbase(CLTV_HEIGHT - 1), block_time)
|
|
block.nVersion = 3
|
|
block.vtx.extend(invalid_ctlv_txs)
|
|
block.hashMerkleRoot = block.calc_merkle_root()
|
|
block.solve()
|
|
|
|
self.test_cltv_info(is_active=False) # Not active as of current tip and next block does not need to obey rules
|
|
peer.send_and_ping(msg_block(block))
|
|
self.test_cltv_info(is_active=True) # Not active as of current tip, but next block must obey rules
|
|
assert_equal(self.nodes[0].getbestblockhash(), block.hash)
|
|
|
|
self.log.info("Test that blocks must now be at least version 4")
|
|
tip = block.sha256
|
|
block_time += 1
|
|
block = create_block(tip, create_coinbase(CLTV_HEIGHT), block_time)
|
|
block.nVersion = 3
|
|
block.solve()
|
|
|
|
with self.nodes[0].assert_debug_log(expected_msgs=['{}, bad-version(0x00000003)'.format(block.hash)]):
|
|
peer.send_and_ping(msg_block(block))
|
|
assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
|
|
peer.sync_with_ping()
|
|
|
|
self.log.info("Test that invalid-according-to-CLTV transactions cannot appear in a block")
|
|
block.nVersion = 4
|
|
block.vtx.append(CTransaction()) # dummy tx after coinbase that will be replaced later
|
|
|
|
# create and test one invalid tx per CLTV failure reason (5 in total)
|
|
for i in range(5):
|
|
spendtx = create_transaction(self.nodes[0], self.coinbase_txids[10+i],
|
|
self.nodeaddress, amount=1.0)
|
|
spendtx = cltv_invalidate(self.nodes[0], spendtx, i)
|
|
spendtx.rehash()
|
|
|
|
expected_cltv_reject_reason = [
|
|
"non-mandatory-script-verify-flag (Operation not valid with the current stack size)",
|
|
"non-mandatory-script-verify-flag (Negative locktime)",
|
|
"non-mandatory-script-verify-flag (Locktime requirement not satisfied)",
|
|
"non-mandatory-script-verify-flag (Locktime requirement not satisfied)",
|
|
"non-mandatory-script-verify-flag (Locktime requirement not satisfied)",
|
|
][i]
|
|
# First we show that this tx is valid except for CLTV by getting it
|
|
# rejected from the mempool for exactly that reason.
|
|
assert_equal(
|
|
[{
|
|
'txid': spendtx.hash,
|
|
'wtxid': spendtx.getwtxid(),
|
|
'allowed': False,
|
|
'reject-reason': expected_cltv_reject_reason,
|
|
}],
|
|
self.nodes[0].testmempoolaccept(rawtxs=[spendtx.serialize().hex()], maxfeerate=0),
|
|
)
|
|
|
|
# Now we verify that a block with this transaction is also invalid.
|
|
block.vtx[1] = spendtx
|
|
block.hashMerkleRoot = block.calc_merkle_root()
|
|
block.solve()
|
|
|
|
with self.nodes[0].assert_debug_log(expected_msgs=['CheckInputScripts on {} failed with {}'.format(
|
|
block.vtx[-1].hash, expected_cltv_reject_reason)]):
|
|
peer.send_and_ping(msg_block(block))
|
|
assert_equal(int(self.nodes[0].getbestblockhash(), 16), tip)
|
|
peer.sync_with_ping()
|
|
|
|
self.log.info("Test that a version 4 block with a valid-according-to-CLTV transaction is accepted")
|
|
spendtx = cltv_validate(self.nodes[0], spendtx, CLTV_HEIGHT - 1)
|
|
spendtx.rehash()
|
|
|
|
block.vtx.pop(1)
|
|
block.vtx.append(spendtx)
|
|
block.hashMerkleRoot = block.calc_merkle_root()
|
|
block.solve()
|
|
|
|
self.test_cltv_info(is_active=True) # Not active as of current tip, but next block must obey rules
|
|
peer.send_and_ping(msg_block(block))
|
|
self.test_cltv_info(is_active=True) # Active as of current tip
|
|
assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256)
|
|
|
|
|
|
if __name__ == '__main__':
|
|
BIP65Test().main()
|