1791 lines
78 KiB
Python
Executable file
1791 lines
78 KiB
Python
Executable file
#!/usr/bin/env python3
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# Copyright (c) 2016 The Bitcoin Core developers
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# Distributed under the MIT software license, see the accompanying
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# file COPYING or http://www.opensource.org/licenses/mit-license.php.
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from test_framework.mininode import *
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from test_framework.test_framework import BitcoinTestFramework
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from test_framework.util import *
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from test_framework.script import *
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from test_framework.blocktools import create_block, create_coinbase, add_witness_commitment, WITNESS_COMMITMENT_HEADER
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from test_framework.key import CECKey, CPubKey
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import time
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import random
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from binascii import hexlify
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# The versionbit bit used to signal activation of SegWit
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VB_WITNESS_BIT = 1
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VB_PERIOD = 144
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VB_ACTIVATION_THRESHOLD = 108
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VB_TOP_BITS = 0x20000000
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MAX_SIGOP_COST = 80000
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'''
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SegWit p2p test.
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'''
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# Calculate the virtual size of a witness block:
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# (base + witness/4)
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def get_virtual_size(witness_block):
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base_size = len(witness_block.serialize())
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total_size = len(witness_block.serialize(with_witness=True))
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# the "+3" is so we round up
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vsize = int((3*base_size + total_size + 3)/4)
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return vsize
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# Note: we can reduce code by using SingleNodeConnCB (in master, not 0.12)
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class TestNode(NodeConnCB):
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def __init__(self):
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NodeConnCB.__init__(self)
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self.connection = None
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self.ping_counter = 1
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self.last_pong = msg_pong(0)
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self.sleep_time = 0.05
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self.getdataset = set()
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self.last_reject = None
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def add_connection(self, conn):
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self.connection = conn
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# Wrapper for the NodeConn's send_message function
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def send_message(self, message):
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self.connection.send_message(message)
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def on_inv(self, conn, message):
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self.last_inv = message
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def on_block(self, conn, message):
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self.last_block = message.block
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self.last_block.calc_sha256()
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def on_getdata(self, conn, message):
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for inv in message.inv:
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self.getdataset.add(inv.hash)
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self.last_getdata = message
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def on_pong(self, conn, message):
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self.last_pong = message
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def on_reject(self, conn, message):
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self.last_reject = message
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#print (message)
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# Syncing helpers
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def sync(self, test_function, timeout=60):
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while timeout > 0:
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with mininode_lock:
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if test_function():
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return
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time.sleep(self.sleep_time)
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timeout -= self.sleep_time
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raise AssertionError("Sync failed to complete")
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def sync_with_ping(self, timeout=60):
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self.send_message(msg_ping(nonce=self.ping_counter))
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test_function = lambda: self.last_pong.nonce == self.ping_counter
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self.sync(test_function, timeout)
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self.ping_counter += 1
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return
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def wait_for_block(self, blockhash, timeout=60):
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test_function = lambda: self.last_block != None and self.last_block.sha256 == blockhash
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self.sync(test_function, timeout)
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return
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def wait_for_getdata(self, timeout=60):
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test_function = lambda: self.last_getdata != None
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self.sync(test_function, timeout)
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def wait_for_inv(self, expected_inv, timeout=60):
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test_function = lambda: self.last_inv != expected_inv
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self.sync(test_function, timeout)
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def announce_tx_and_wait_for_getdata(self, tx, timeout=60):
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with mininode_lock:
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self.last_getdata = None
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self.send_message(msg_inv(inv=[CInv(1, tx.sha256)]))
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self.wait_for_getdata(timeout)
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return
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def announce_block_and_wait_for_getdata(self, block, use_header, timeout=60):
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with mininode_lock:
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self.last_getdata = None
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if use_header:
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msg = msg_headers()
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msg.headers = [ CBlockHeader(block) ]
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self.send_message(msg)
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else:
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self.send_message(msg_inv(inv=[CInv(2, block.sha256)]))
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self.wait_for_getdata()
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return
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def announce_block(self, block, use_header):
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with mininode_lock:
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self.last_getdata = None
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if use_header:
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msg = msg_headers()
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msg.headers = [ CBlockHeader(block) ]
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self.send_message(msg)
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else:
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self.send_message(msg_inv(inv=[CInv(2, block.sha256)]))
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def request_block(self, blockhash, inv_type, timeout=60):
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with mininode_lock:
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self.last_block = None
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self.send_message(msg_getdata(inv=[CInv(inv_type, blockhash)]))
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self.wait_for_block(blockhash, timeout)
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return self.last_block
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def test_transaction_acceptance(self, tx, with_witness, accepted, reason=None):
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tx_message = msg_tx(tx)
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if with_witness:
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tx_message = msg_witness_tx(tx)
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self.send_message(tx_message)
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self.sync_with_ping()
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assert_equal(tx.hash in self.connection.rpc.getrawmempool(), accepted)
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if (reason != None and not accepted):
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# Check the rejection reason as well.
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with mininode_lock:
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assert_equal(self.last_reject.reason, reason)
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# Test whether a witness block had the correct effect on the tip
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def test_witness_block(self, block, accepted, with_witness=True):
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if with_witness:
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self.send_message(msg_witness_block(block))
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else:
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self.send_message(msg_block(block))
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self.sync_with_ping()
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assert_equal(self.connection.rpc.getbestblockhash() == block.hash, accepted)
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# Used to keep track of anyone-can-spend outputs that we can use in the tests
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class UTXO(object):
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def __init__(self, sha256, n, nValue):
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self.sha256 = sha256
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self.n = n
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self.nValue = nValue
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class SegWitTest(BitcoinTestFramework):
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def __init__(self):
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super().__init__()
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self.setup_clean_chain = True
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self.num_nodes = 3
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def add_options(self, parser):
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parser.add_option("--oldbinary", dest="oldbinary",
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default=None,
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help="pre-segwit bitcoind binary for upgrade testing")
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def setup_network(self):
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self.nodes = []
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self.nodes.append(start_node(0, self.options.tmpdir, ["-debug", "-logtimemicros=1", "-whitelist=127.0.0.1"]))
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# Start a node for testing IsStandard rules.
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self.nodes.append(start_node(1, self.options.tmpdir, ["-debug", "-logtimemicros=1", "-whitelist=127.0.0.1", "-acceptnonstdtxn=0"]))
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connect_nodes(self.nodes[0], 1)
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# If an old bitcoind is given, do the upgrade-after-activation test.
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self.test_upgrade = False
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if (self.options.oldbinary != None):
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self.nodes.append(start_node(2, self.options.tmpdir, ["-debug", "-whitelist=127.0.0.1"], binary=self.options.oldbinary))
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connect_nodes(self.nodes[0], 2)
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self.test_upgrade = True
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''' Helpers '''
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# Build a block on top of node0's tip.
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def build_next_block(self, nVersion=4):
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tip = self.nodes[0].getbestblockhash()
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height = self.nodes[0].getblockcount() + 1
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block_time = self.nodes[0].getblockheader(tip)["mediantime"] + 1
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block = create_block(int(tip, 16), create_coinbase(height), block_time)
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block.nVersion = nVersion
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block.rehash()
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return block
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# Adds list of transactions to block, adds witness commitment, then solves.
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def update_witness_block_with_transactions(self, block, tx_list, nonce=0):
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block.vtx.extend(tx_list)
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add_witness_commitment(block, nonce)
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block.solve()
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return
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''' Individual tests '''
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def test_witness_services(self):
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print("\tVerifying NODE_WITNESS service bit")
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assert((self.test_node.connection.nServices & NODE_WITNESS) != 0)
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# See if sending a regular transaction works, and create a utxo
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# to use in later tests.
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def test_non_witness_transaction(self):
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# Mine a block with an anyone-can-spend coinbase,
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# let it mature, then try to spend it.
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print("\tTesting non-witness transaction")
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block = self.build_next_block(nVersion=1)
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block.solve()
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self.test_node.send_message(msg_block(block))
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self.test_node.sync_with_ping() # make sure the block was processed
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txid = block.vtx[0].sha256
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self.nodes[0].generate(99) # let the block mature
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# Create a transaction that spends the coinbase
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tx = CTransaction()
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tx.vin.append(CTxIn(COutPoint(txid, 0), b""))
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tx.vout.append(CTxOut(49*100000000, CScript([OP_TRUE])))
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tx.calc_sha256()
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# Check that serializing it with or without witness is the same
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# This is a sanity check of our testing framework.
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assert_equal(msg_tx(tx).serialize(), msg_witness_tx(tx).serialize())
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self.test_node.send_message(msg_witness_tx(tx))
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self.test_node.sync_with_ping() # make sure the tx was processed
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assert(tx.hash in self.nodes[0].getrawmempool())
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# Save this transaction for later
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self.utxo.append(UTXO(tx.sha256, 0, 49*100000000))
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self.nodes[0].generate(1)
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# Verify that blocks with witnesses are rejected before activation.
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def test_unnecessary_witness_before_segwit_activation(self):
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print("\tTesting behavior of unnecessary witnesses")
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# For now, rely on earlier tests to have created at least one utxo for
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# us to use
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assert(len(self.utxo) > 0)
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assert(get_bip9_status(self.nodes[0], 'segwit')['status'] != 'active')
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tx = CTransaction()
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tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
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tx.vout.append(CTxOut(self.utxo[0].nValue-1000, CScript([OP_TRUE])))
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tx.wit.vtxinwit.append(CTxInWitness())
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tx.wit.vtxinwit[0].scriptWitness.stack = [CScript([CScriptNum(1)])]
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# Verify the hash with witness differs from the txid
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# (otherwise our testing framework must be broken!)
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tx.rehash()
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assert(tx.sha256 != tx.calc_sha256(with_witness=True))
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# Construct a segwit-signaling block that includes the transaction.
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block = self.build_next_block(nVersion=(VB_TOP_BITS|(1 << VB_WITNESS_BIT)))
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self.update_witness_block_with_transactions(block, [tx])
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# Sending witness data before activation is not allowed (anti-spam
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# rule).
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self.test_node.test_witness_block(block, accepted=False)
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# TODO: fix synchronization so we can test reject reason
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# Right now, bitcoind delays sending reject messages for blocks
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# until the future, making synchronization here difficult.
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#assert_equal(self.test_node.last_reject.reason, "unexpected-witness")
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# But it should not be permanently marked bad...
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# Resend without witness information.
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self.test_node.send_message(msg_block(block))
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self.test_node.sync_with_ping()
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assert_equal(self.nodes[0].getbestblockhash(), block.hash)
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sync_blocks(self.nodes)
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# Create a p2sh output -- this is so we can pass the standardness
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# rules (an anyone-can-spend OP_TRUE would be rejected, if not wrapped
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# in P2SH).
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p2sh_program = CScript([OP_TRUE])
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p2sh_pubkey = hash160(p2sh_program)
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scriptPubKey = CScript([OP_HASH160, p2sh_pubkey, OP_EQUAL])
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# Now check that unnecessary witnesses can't be used to blind a node
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# to a transaction, eg by violating standardness checks.
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tx2 = CTransaction()
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tx2.vin.append(CTxIn(COutPoint(tx.sha256, 0), b""))
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tx2.vout.append(CTxOut(tx.vout[0].nValue-1000, scriptPubKey))
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tx2.rehash()
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self.test_node.test_transaction_acceptance(tx2, False, True)
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self.nodes[0].generate(1)
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sync_blocks(self.nodes)
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# We'll add an unnecessary witness to this transaction that would cause
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# it to be too large according to IsStandard.
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tx3 = CTransaction()
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tx3.vin.append(CTxIn(COutPoint(tx2.sha256, 0), CScript([p2sh_program])))
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tx3.vout.append(CTxOut(tx2.vout[0].nValue-1000, scriptPubKey))
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tx3.wit.vtxinwit.append(CTxInWitness())
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tx3.wit.vtxinwit[0].scriptWitness.stack = [b'a'*400000]
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tx3.rehash()
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self.std_node.test_transaction_acceptance(tx3, True, False, b'no-witness-yet')
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# If we send without witness, it should be accepted.
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self.std_node.test_transaction_acceptance(tx3, False, True)
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# Now create a new anyone-can-spend utxo for the next test.
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tx4 = CTransaction()
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tx4.vin.append(CTxIn(COutPoint(tx3.sha256, 0), CScript([p2sh_program])))
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tx4.vout.append(CTxOut(tx3.vout[0].nValue-1000, CScript([OP_TRUE])))
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tx4.rehash()
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self.test_node.test_transaction_acceptance(tx3, False, True)
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self.test_node.test_transaction_acceptance(tx4, False, True)
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self.nodes[0].generate(1)
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sync_blocks(self.nodes)
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# Update our utxo list; we spent the first entry.
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self.utxo.pop(0)
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self.utxo.append(UTXO(tx4.sha256, 0, tx4.vout[0].nValue))
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# Mine enough blocks for segwit's vb state to be 'started'.
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def advance_to_segwit_started(self):
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height = self.nodes[0].getblockcount()
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# Will need to rewrite the tests here if we are past the first period
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assert(height < VB_PERIOD - 1)
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# Genesis block is 'defined'.
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'defined')
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# Advance to end of period, status should now be 'started'
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self.nodes[0].generate(VB_PERIOD-height-1)
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'started')
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# Mine enough blocks to lock in segwit, but don't activate.
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# TODO: we could verify that lockin only happens at the right threshold of
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# signalling blocks, rather than just at the right period boundary.
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def advance_to_segwit_lockin(self):
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height = self.nodes[0].getblockcount()
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'started')
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# Advance to end of period, and verify lock-in happens at the end
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self.nodes[0].generate(VB_PERIOD-1)
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height = self.nodes[0].getblockcount()
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assert((height % VB_PERIOD) == VB_PERIOD - 2)
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'started')
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self.nodes[0].generate(1)
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'locked_in')
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# Mine enough blocks to activate segwit.
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# TODO: we could verify that activation only happens at the right threshold
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# of signalling blocks, rather than just at the right period boundary.
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def advance_to_segwit_active(self):
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'locked_in')
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height = self.nodes[0].getblockcount()
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self.nodes[0].generate(VB_PERIOD - (height%VB_PERIOD) - 2)
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'locked_in')
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self.nodes[0].generate(1)
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assert_equal(get_bip9_status(self.nodes[0], 'segwit')['status'], 'active')
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# This test can only be run after segwit has activated
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def test_witness_commitments(self):
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print("\tTesting witness commitments")
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# First try a correct witness commitment.
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block = self.build_next_block()
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add_witness_commitment(block)
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block.solve()
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# Test the test -- witness serialization should be different
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assert(msg_witness_block(block).serialize() != msg_block(block).serialize())
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# This empty block should be valid.
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self.test_node.test_witness_block(block, accepted=True)
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# Try to tweak the nonce
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block_2 = self.build_next_block()
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add_witness_commitment(block_2, nonce=28)
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block_2.solve()
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# The commitment should have changed!
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assert(block_2.vtx[0].vout[-1] != block.vtx[0].vout[-1])
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# This should also be valid.
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self.test_node.test_witness_block(block_2, accepted=True)
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# Now test commitments with actual transactions
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assert (len(self.utxo) > 0)
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tx = CTransaction()
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tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
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# Let's construct a witness program
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witness_program = CScript([OP_TRUE])
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witness_hash = sha256(witness_program)
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scriptPubKey = CScript([OP_0, witness_hash])
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tx.vout.append(CTxOut(self.utxo[0].nValue-1000, scriptPubKey))
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tx.rehash()
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# tx2 will spend tx1, and send back to a regular anyone-can-spend address
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tx2 = CTransaction()
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tx2.vin.append(CTxIn(COutPoint(tx.sha256, 0), b""))
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tx2.vout.append(CTxOut(tx.vout[0].nValue-1000, witness_program))
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tx2.wit.vtxinwit.append(CTxInWitness())
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tx2.wit.vtxinwit[0].scriptWitness.stack = [witness_program]
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tx2.rehash()
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block_3 = self.build_next_block()
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self.update_witness_block_with_transactions(block_3, [tx, tx2], nonce=1)
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# Add an extra OP_RETURN output that matches the witness commitment template,
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# even though it has extra data after the incorrect commitment.
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# This block should fail.
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block_3.vtx[0].vout.append(CTxOut(0, CScript([OP_RETURN, WITNESS_COMMITMENT_HEADER + ser_uint256(2), 10])))
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block_3.vtx[0].rehash()
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block_3.hashMerkleRoot = block_3.calc_merkle_root()
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block_3.rehash()
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block_3.solve()
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self.test_node.test_witness_block(block_3, accepted=False)
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# Add a different commitment with different nonce, but in the
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# right location, and with some funds burned(!).
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# This should succeed (nValue shouldn't affect finding the
|
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# witness commitment).
|
|
add_witness_commitment(block_3, nonce=0)
|
|
block_3.vtx[0].vout[0].nValue -= 1
|
|
block_3.vtx[0].vout[-1].nValue += 1
|
|
block_3.vtx[0].rehash()
|
|
block_3.hashMerkleRoot = block_3.calc_merkle_root()
|
|
block_3.rehash()
|
|
assert(len(block_3.vtx[0].vout) == 4) # 3 OP_returns
|
|
block_3.solve()
|
|
self.test_node.test_witness_block(block_3, accepted=True)
|
|
|
|
# Finally test that a block with no witness transactions can
|
|
# omit the commitment.
|
|
block_4 = self.build_next_block()
|
|
tx3 = CTransaction()
|
|
tx3.vin.append(CTxIn(COutPoint(tx2.sha256, 0), b""))
|
|
tx3.vout.append(CTxOut(tx.vout[0].nValue-1000, witness_program))
|
|
tx3.rehash()
|
|
block_4.vtx.append(tx3)
|
|
block_4.hashMerkleRoot = block_4.calc_merkle_root()
|
|
block_4.solve()
|
|
self.test_node.test_witness_block(block_4, with_witness=False, accepted=True)
|
|
|
|
# Update available utxo's for use in later test.
|
|
self.utxo.pop(0)
|
|
self.utxo.append(UTXO(tx3.sha256, 0, tx3.vout[0].nValue))
|
|
|
|
|
|
def test_block_malleability(self):
|
|
print("\tTesting witness block malleability")
|
|
|
|
# Make sure that a block that has too big a virtual size
|
|
# because of a too-large coinbase witness is not permanently
|
|
# marked bad.
|
|
block = self.build_next_block()
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
|
|
block.vtx[0].wit.vtxinwit[0].scriptWitness.stack.append(b'a'*5000000)
|
|
assert(get_virtual_size(block) > MAX_BLOCK_SIZE)
|
|
|
|
# We can't send over the p2p network, because this is too big to relay
|
|
# TODO: repeat this test with a block that can be relayed
|
|
self.nodes[0].submitblock(bytes_to_hex_str(block.serialize(True)))
|
|
|
|
assert(self.nodes[0].getbestblockhash() != block.hash)
|
|
|
|
block.vtx[0].wit.vtxinwit[0].scriptWitness.stack.pop()
|
|
assert(get_virtual_size(block) < MAX_BLOCK_SIZE)
|
|
self.nodes[0].submitblock(bytes_to_hex_str(block.serialize(True)))
|
|
|
|
assert(self.nodes[0].getbestblockhash() == block.hash)
|
|
|
|
# Now make sure that malleating the witness nonce doesn't
|
|
# result in a block permanently marked bad.
|
|
block = self.build_next_block()
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
|
|
# Change the nonce -- should not cause the block to be permanently
|
|
# failed
|
|
block.vtx[0].wit.vtxinwit[0].scriptWitness.stack = [ ser_uint256(1) ]
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Changing the witness nonce doesn't change the block hash
|
|
block.vtx[0].wit.vtxinwit[0].scriptWitness.stack = [ ser_uint256(0) ]
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
|
|
def test_witness_block_size(self):
|
|
print("\tTesting witness block size limit")
|
|
# TODO: Test that non-witness carrying blocks can't exceed 1MB
|
|
# Skipping this test for now; this is covered in p2p-fullblocktest.py
|
|
|
|
# Test that witness-bearing blocks are limited at ceil(base + wit/4) <= 1MB.
|
|
block = self.build_next_block()
|
|
|
|
assert(len(self.utxo) > 0)
|
|
|
|
# Create a P2WSH transaction.
|
|
# The witness program will be a bunch of OP_2DROP's, followed by OP_TRUE.
|
|
# This should give us plenty of room to tweak the spending tx's
|
|
# virtual size.
|
|
NUM_DROPS = 200 # 201 max ops per script!
|
|
NUM_OUTPUTS = 50
|
|
|
|
witness_program = CScript([OP_2DROP]*NUM_DROPS + [OP_TRUE])
|
|
witness_hash = uint256_from_str(sha256(witness_program))
|
|
scriptPubKey = CScript([OP_0, ser_uint256(witness_hash)])
|
|
|
|
prevout = COutPoint(self.utxo[0].sha256, self.utxo[0].n)
|
|
value = self.utxo[0].nValue
|
|
|
|
parent_tx = CTransaction()
|
|
parent_tx.vin.append(CTxIn(prevout, b""))
|
|
child_value = int(value/NUM_OUTPUTS)
|
|
for i in range(NUM_OUTPUTS):
|
|
parent_tx.vout.append(CTxOut(child_value, scriptPubKey))
|
|
parent_tx.vout[0].nValue -= 50000
|
|
assert(parent_tx.vout[0].nValue > 0)
|
|
parent_tx.rehash()
|
|
|
|
child_tx = CTransaction()
|
|
for i in range(NUM_OUTPUTS):
|
|
child_tx.vin.append(CTxIn(COutPoint(parent_tx.sha256, i), b""))
|
|
child_tx.vout = [CTxOut(value - 100000, CScript([OP_TRUE]))]
|
|
for i in range(NUM_OUTPUTS):
|
|
child_tx.wit.vtxinwit.append(CTxInWitness())
|
|
child_tx.wit.vtxinwit[-1].scriptWitness.stack = [b'a'*195]*(2*NUM_DROPS) + [witness_program]
|
|
child_tx.rehash()
|
|
self.update_witness_block_with_transactions(block, [parent_tx, child_tx])
|
|
|
|
vsize = get_virtual_size(block)
|
|
additional_bytes = (MAX_BLOCK_SIZE - vsize)*4
|
|
i = 0
|
|
while additional_bytes > 0:
|
|
# Add some more bytes to each input until we hit MAX_BLOCK_SIZE+1
|
|
extra_bytes = min(additional_bytes+1, 55)
|
|
block.vtx[-1].wit.vtxinwit[int(i/(2*NUM_DROPS))].scriptWitness.stack[i%(2*NUM_DROPS)] = b'a'*(195+extra_bytes)
|
|
additional_bytes -= extra_bytes
|
|
i += 1
|
|
|
|
block.vtx[0].vout.pop() # Remove old commitment
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
vsize = get_virtual_size(block)
|
|
assert_equal(vsize, MAX_BLOCK_SIZE + 1)
|
|
# Make sure that our test case would exceed the old max-network-message
|
|
# limit
|
|
assert(len(block.serialize(True)) > 2*1024*1024)
|
|
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Now resize the second transaction to make the block fit.
|
|
cur_length = len(block.vtx[-1].wit.vtxinwit[0].scriptWitness.stack[0])
|
|
block.vtx[-1].wit.vtxinwit[0].scriptWitness.stack[0] = b'a'*(cur_length-1)
|
|
block.vtx[0].vout.pop()
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
assert(get_virtual_size(block) == MAX_BLOCK_SIZE)
|
|
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
# Update available utxo's
|
|
self.utxo.pop(0)
|
|
self.utxo.append(UTXO(block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue))
|
|
|
|
|
|
# submitblock will try to add the nonce automatically, so that mining
|
|
# software doesn't need to worry about doing so itself.
|
|
def test_submit_block(self):
|
|
block = self.build_next_block()
|
|
|
|
# Try using a custom nonce and then don't supply it.
|
|
# This shouldn't possibly work.
|
|
add_witness_commitment(block, nonce=1)
|
|
block.vtx[0].wit = CTxWitness() # drop the nonce
|
|
block.solve()
|
|
self.nodes[0].submitblock(bytes_to_hex_str(block.serialize(True)))
|
|
assert(self.nodes[0].getbestblockhash() != block.hash)
|
|
|
|
# Now redo commitment with the standard nonce, but let bitcoind fill it in.
|
|
add_witness_commitment(block, nonce=0)
|
|
block.vtx[0].wit = CTxWitness()
|
|
block.solve()
|
|
self.nodes[0].submitblock(bytes_to_hex_str(block.serialize(True)))
|
|
assert_equal(self.nodes[0].getbestblockhash(), block.hash)
|
|
|
|
# This time, add a tx with non-empty witness, but don't supply
|
|
# the commitment.
|
|
block_2 = self.build_next_block()
|
|
|
|
add_witness_commitment(block_2)
|
|
|
|
block_2.solve()
|
|
|
|
# Drop commitment and nonce -- submitblock should not fill in.
|
|
block_2.vtx[0].vout.pop()
|
|
block_2.vtx[0].wit = CTxWitness()
|
|
|
|
self.nodes[0].submitblock(bytes_to_hex_str(block_2.serialize(True)))
|
|
# Tip should not advance!
|
|
assert(self.nodes[0].getbestblockhash() != block_2.hash)
|
|
|
|
|
|
# Consensus tests of extra witness data in a transaction.
|
|
def test_extra_witness_data(self):
|
|
print("\tTesting extra witness data in tx")
|
|
|
|
assert(len(self.utxo) > 0)
|
|
|
|
block = self.build_next_block()
|
|
|
|
witness_program = CScript([OP_DROP, OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
|
|
# First try extra witness data on a tx that doesn't require a witness
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
tx.vout.append(CTxOut(self.utxo[0].nValue-2000, scriptPubKey))
|
|
tx.vout.append(CTxOut(1000, CScript([OP_TRUE]))) # non-witness output
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
tx.wit.vtxinwit[0].scriptWitness.stack = [CScript([])]
|
|
tx.rehash()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
|
|
# Extra witness data should not be allowed.
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Try extra signature data. Ok if we're not spending a witness output.
|
|
block.vtx[1].wit.vtxinwit = []
|
|
block.vtx[1].vin[0].scriptSig = CScript([OP_0])
|
|
block.vtx[1].rehash()
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
# Now try extra witness/signature data on an input that DOES require a
|
|
# witness
|
|
tx2 = CTransaction()
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, 0), b"")) # witness output
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, 1), b"")) # non-witness
|
|
tx2.vout.append(CTxOut(tx.vout[0].nValue, CScript([OP_TRUE])))
|
|
tx2.wit.vtxinwit.extend([CTxInWitness(), CTxInWitness()])
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack = [ CScript([CScriptNum(1)]), CScript([CScriptNum(1)]), witness_program ]
|
|
tx2.wit.vtxinwit[1].scriptWitness.stack = [ CScript([OP_TRUE]) ]
|
|
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx2])
|
|
|
|
# This has extra witness data, so it should fail.
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Now get rid of the extra witness, but add extra scriptSig data
|
|
tx2.vin[0].scriptSig = CScript([OP_TRUE])
|
|
tx2.vin[1].scriptSig = CScript([OP_TRUE])
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack.pop(0)
|
|
tx2.wit.vtxinwit[1].scriptWitness.stack = []
|
|
tx2.rehash()
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
|
|
# This has extra signature data for a witness input, so it should fail.
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Now get rid of the extra scriptsig on the witness input, and verify
|
|
# success (even with extra scriptsig data in the non-witness input)
|
|
tx2.vin[0].scriptSig = b""
|
|
tx2.rehash()
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
# Update utxo for later tests
|
|
self.utxo.pop(0)
|
|
self.utxo.append(UTXO(tx2.sha256, 0, tx2.vout[0].nValue))
|
|
|
|
|
|
def test_max_witness_push_length(self):
|
|
''' Should only allow up to 520 byte pushes in witness stack '''
|
|
print("\tTesting maximum witness push size")
|
|
MAX_SCRIPT_ELEMENT_SIZE = 520
|
|
assert(len(self.utxo))
|
|
|
|
block = self.build_next_block()
|
|
|
|
witness_program = CScript([OP_DROP, OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
tx.vout.append(CTxOut(self.utxo[0].nValue-1000, scriptPubKey))
|
|
tx.rehash()
|
|
|
|
tx2 = CTransaction()
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, 0), b""))
|
|
tx2.vout.append(CTxOut(tx.vout[0].nValue-1000, CScript([OP_TRUE])))
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
# First try a 521-byte stack element
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack = [ b'a'*(MAX_SCRIPT_ELEMENT_SIZE+1), witness_program ]
|
|
tx2.rehash()
|
|
|
|
self.update_witness_block_with_transactions(block, [tx, tx2])
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Now reduce the length of the stack element
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack[0] = b'a'*(MAX_SCRIPT_ELEMENT_SIZE)
|
|
|
|
add_witness_commitment(block)
|
|
block.solve()
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
# Update the utxo for later tests
|
|
self.utxo.pop()
|
|
self.utxo.append(UTXO(tx2.sha256, 0, tx2.vout[0].nValue))
|
|
|
|
def test_max_witness_program_length(self):
|
|
# Can create witness outputs that are long, but can't be greater than
|
|
# 10k bytes to successfully spend
|
|
print("\tTesting maximum witness program length")
|
|
assert(len(self.utxo))
|
|
MAX_PROGRAM_LENGTH = 10000
|
|
|
|
# This program is 19 max pushes (9937 bytes), then 64 more opcode-bytes.
|
|
long_witness_program = CScript([b'a'*520]*19 + [OP_DROP]*63 + [OP_TRUE])
|
|
assert(len(long_witness_program) == MAX_PROGRAM_LENGTH+1)
|
|
long_witness_hash = sha256(long_witness_program)
|
|
long_scriptPubKey = CScript([OP_0, long_witness_hash])
|
|
|
|
block = self.build_next_block()
|
|
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
tx.vout.append(CTxOut(self.utxo[0].nValue-1000, long_scriptPubKey))
|
|
tx.rehash()
|
|
|
|
tx2 = CTransaction()
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, 0), b""))
|
|
tx2.vout.append(CTxOut(tx.vout[0].nValue-1000, CScript([OP_TRUE])))
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack = [b'a']*44 + [long_witness_program]
|
|
tx2.rehash()
|
|
|
|
self.update_witness_block_with_transactions(block, [tx, tx2])
|
|
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Try again with one less byte in the witness program
|
|
witness_program = CScript([b'a'*520]*19 + [OP_DROP]*62 + [OP_TRUE])
|
|
assert(len(witness_program) == MAX_PROGRAM_LENGTH)
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
|
|
tx.vout[0] = CTxOut(tx.vout[0].nValue, scriptPubKey)
|
|
tx.rehash()
|
|
tx2.vin[0].prevout.hash = tx.sha256
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack = [b'a']*43 + [witness_program]
|
|
tx2.rehash()
|
|
block.vtx = [block.vtx[0]]
|
|
self.update_witness_block_with_transactions(block, [tx, tx2])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
self.utxo.pop()
|
|
self.utxo.append(UTXO(tx2.sha256, 0, tx2.vout[0].nValue))
|
|
|
|
|
|
def test_witness_input_length(self):
|
|
''' Ensure that vin length must match vtxinwit length '''
|
|
print("\tTesting witness input length")
|
|
assert(len(self.utxo))
|
|
|
|
witness_program = CScript([OP_DROP, OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
|
|
# Create a transaction that splits our utxo into many outputs
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
nValue = self.utxo[0].nValue
|
|
for i in range(10):
|
|
tx.vout.append(CTxOut(int(nValue/10), scriptPubKey))
|
|
tx.vout[0].nValue -= 1000
|
|
assert(tx.vout[0].nValue >= 0)
|
|
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
# Try various ways to spend tx that should all break.
|
|
# This "broken" transaction serializer will not normalize
|
|
# the length of vtxinwit.
|
|
class BrokenCTransaction(CTransaction):
|
|
def serialize_with_witness(self):
|
|
flags = 0
|
|
if not self.wit.is_null():
|
|
flags |= 1
|
|
r = b""
|
|
r += struct.pack("<i", self.nVersion)
|
|
if flags:
|
|
dummy = []
|
|
r += ser_vector(dummy)
|
|
r += struct.pack("<B", flags)
|
|
r += ser_vector(self.vin)
|
|
r += ser_vector(self.vout)
|
|
if flags & 1:
|
|
r += self.wit.serialize()
|
|
r += struct.pack("<I", self.nLockTime)
|
|
return r
|
|
|
|
tx2 = BrokenCTransaction()
|
|
for i in range(10):
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, i), b""))
|
|
tx2.vout.append(CTxOut(nValue-3000, CScript([OP_TRUE])))
|
|
|
|
# First try using a too long vtxinwit
|
|
for i in range(11):
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[i].scriptWitness.stack = [b'a', witness_program]
|
|
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx2])
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Now try using a too short vtxinwit
|
|
tx2.wit.vtxinwit.pop()
|
|
tx2.wit.vtxinwit.pop()
|
|
|
|
block.vtx = [block.vtx[0]]
|
|
self.update_witness_block_with_transactions(block, [tx2])
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Now make one of the intermediate witnesses be incorrect
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[-1].scriptWitness.stack = [b'a', witness_program]
|
|
tx2.wit.vtxinwit[5].scriptWitness.stack = [ witness_program ]
|
|
|
|
block.vtx = [block.vtx[0]]
|
|
self.update_witness_block_with_transactions(block, [tx2])
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Fix the broken witness and the block should be accepted.
|
|
tx2.wit.vtxinwit[5].scriptWitness.stack = [b'a', witness_program]
|
|
block.vtx = [block.vtx[0]]
|
|
self.update_witness_block_with_transactions(block, [tx2])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
self.utxo.pop()
|
|
self.utxo.append(UTXO(tx2.sha256, 0, tx2.vout[0].nValue))
|
|
|
|
|
|
def test_witness_tx_relay_before_segwit_activation(self):
|
|
print("\tTesting relay of witness transactions")
|
|
# Generate a transaction that doesn't require a witness, but send it
|
|
# with a witness. Should be rejected for premature-witness, but should
|
|
# not be added to recently rejected list.
|
|
assert(len(self.utxo))
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
tx.vout.append(CTxOut(self.utxo[0].nValue-1000, CScript([OP_TRUE])))
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
tx.wit.vtxinwit[0].scriptWitness.stack = [ b'a' ]
|
|
tx.rehash()
|
|
|
|
tx_hash = tx.sha256
|
|
tx_value = tx.vout[0].nValue
|
|
|
|
# Verify that if a peer doesn't set nServices to include NODE_WITNESS,
|
|
# the getdata is just for the non-witness portion.
|
|
self.old_node.announce_tx_and_wait_for_getdata(tx)
|
|
assert(self.old_node.last_getdata.inv[0].type == 1)
|
|
|
|
# Since we haven't delivered the tx yet, inv'ing the same tx from
|
|
# a witness transaction ought not result in a getdata.
|
|
try:
|
|
self.test_node.announce_tx_and_wait_for_getdata(tx, timeout=2)
|
|
print("Error: duplicate tx getdata!")
|
|
assert(False)
|
|
except AssertionError as e:
|
|
pass
|
|
|
|
# Delivering this transaction with witness should fail (no matter who
|
|
# its from)
|
|
assert_equal(len(self.nodes[0].getrawmempool()), 0)
|
|
assert_equal(len(self.nodes[1].getrawmempool()), 0)
|
|
self.old_node.test_transaction_acceptance(tx, with_witness=True, accepted=False)
|
|
self.test_node.test_transaction_acceptance(tx, with_witness=True, accepted=False)
|
|
|
|
# But eliminating the witness should fix it
|
|
self.test_node.test_transaction_acceptance(tx, with_witness=False, accepted=True)
|
|
|
|
# Verify that inv's to test_node come with getdata's for non-witness tx's
|
|
# Just tweak the transaction, announce it, and verify we get a getdata
|
|
# for a normal tx
|
|
tx.vout[0].scriptPubKey = CScript([OP_TRUE, OP_TRUE])
|
|
tx.rehash()
|
|
self.test_node.announce_tx_and_wait_for_getdata(tx)
|
|
assert(self.test_node.last_getdata.inv[0].type == 1)
|
|
|
|
# Cleanup: mine the first transaction and update utxo
|
|
self.nodes[0].generate(1)
|
|
assert_equal(len(self.nodes[0].getrawmempool()), 0)
|
|
|
|
self.utxo.pop(0)
|
|
self.utxo.append(UTXO(tx_hash, 0, tx_value))
|
|
|
|
|
|
# After segwit activates, verify that mempool:
|
|
# - rejects transactions with unnecessary/extra witnesses
|
|
# - accepts transactions with valid witnesses
|
|
# and that witness transactions are relayed to non-upgraded peers.
|
|
def test_tx_relay_after_segwit_activation(self):
|
|
print("\tTesting relay of witness transactions")
|
|
# Generate a transaction that doesn't require a witness, but send it
|
|
# with a witness. Should be rejected because we can't use a witness
|
|
# when spending a non-witness output.
|
|
assert(len(self.utxo))
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
tx.vout.append(CTxOut(self.utxo[0].nValue-1000, CScript([OP_TRUE])))
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
tx.wit.vtxinwit[0].scriptWitness.stack = [ b'a' ]
|
|
tx.rehash()
|
|
|
|
tx_hash = tx.sha256
|
|
tx_value = tx.vout[0].nValue
|
|
|
|
# Verify that unnecessary witnesses are rejected.
|
|
self.test_node.announce_tx_and_wait_for_getdata(tx)
|
|
assert_equal(len(self.nodes[0].getrawmempool()), 0)
|
|
self.test_node.test_transaction_acceptance(tx, with_witness=True, accepted=False)
|
|
|
|
# Verify that removing the witness succeeds.
|
|
# Re-announcing won't result in a getdata for ~2.5 minutes, so just
|
|
# deliver the modified transaction.
|
|
self.test_node.test_transaction_acceptance(tx, with_witness=False, accepted=True)
|
|
|
|
# Now try to add extra witness data to a valid witness tx.
|
|
witness_program = CScript([OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
tx2 = CTransaction()
|
|
tx2.vin.append(CTxIn(COutPoint(tx_hash, 0), b""))
|
|
tx2.vout.append(CTxOut(tx.vout[0].nValue-1000, scriptPubKey))
|
|
tx2.rehash()
|
|
|
|
tx3 = CTransaction()
|
|
tx3.vin.append(CTxIn(COutPoint(tx2.sha256, 0), b""))
|
|
tx3.wit.vtxinwit.append(CTxInWitness())
|
|
|
|
# Add too-large for IsStandard witness and check that it does not enter reject filter
|
|
p2sh_program = CScript([OP_TRUE])
|
|
p2sh_pubkey = hash160(p2sh_program)
|
|
witness_program2 = CScript([b'a'*400000])
|
|
tx3.vout.append(CTxOut(tx2.vout[0].nValue-1000, CScript([OP_HASH160, p2sh_pubkey, OP_EQUAL])))
|
|
tx3.wit.vtxinwit[0].scriptWitness.stack = [witness_program2]
|
|
tx3.rehash()
|
|
|
|
# Node will not be blinded to the transaction
|
|
self.std_node.announce_tx_and_wait_for_getdata(tx3)
|
|
self.std_node.test_transaction_acceptance(tx3, True, False, b'tx-size')
|
|
self.std_node.announce_tx_and_wait_for_getdata(tx3)
|
|
self.std_node.test_transaction_acceptance(tx3, True, False, b'tx-size')
|
|
|
|
# Remove witness stuffing, instead add extra witness push on stack
|
|
tx3.vout[0] = CTxOut(tx2.vout[0].nValue-1000, CScript([OP_TRUE]))
|
|
tx3.wit.vtxinwit[0].scriptWitness.stack = [CScript([CScriptNum(1)]), witness_program ]
|
|
tx3.rehash()
|
|
|
|
self.test_node.test_transaction_acceptance(tx2, with_witness=True, accepted=True)
|
|
self.test_node.test_transaction_acceptance(tx3, with_witness=True, accepted=False)
|
|
|
|
# Get rid of the extra witness, and verify acceptance.
|
|
tx3.wit.vtxinwit[0].scriptWitness.stack = [ witness_program ]
|
|
# Also check that old_node gets a tx announcement, even though this is
|
|
# a witness transaction.
|
|
self.old_node.wait_for_inv(CInv(1, tx2.sha256)) # wait until tx2 was inv'ed
|
|
self.test_node.test_transaction_acceptance(tx3, with_witness=True, accepted=True)
|
|
self.old_node.wait_for_inv(CInv(1, tx3.sha256))
|
|
|
|
# Test that getrawtransaction returns correct witness information
|
|
# hash, size, vsize
|
|
raw_tx = self.nodes[0].getrawtransaction(tx3.hash, 1)
|
|
assert_equal(int(raw_tx["hash"], 16), tx3.calc_sha256(True))
|
|
assert_equal(raw_tx["size"], len(tx3.serialize_with_witness()))
|
|
vsize = (len(tx3.serialize_with_witness()) + 3*len(tx3.serialize_without_witness()) + 3) / 4
|
|
assert_equal(raw_tx["vsize"], vsize)
|
|
assert_equal(len(raw_tx["vin"][0]["txinwitness"]), 1)
|
|
assert_equal(raw_tx["vin"][0]["txinwitness"][0], hexlify(witness_program).decode('ascii'))
|
|
assert(vsize != raw_tx["size"])
|
|
|
|
# Cleanup: mine the transactions and update utxo for next test
|
|
self.nodes[0].generate(1)
|
|
assert_equal(len(self.nodes[0].getrawmempool()), 0)
|
|
|
|
self.utxo.pop(0)
|
|
self.utxo.append(UTXO(tx3.sha256, 0, tx3.vout[0].nValue))
|
|
|
|
|
|
# Test that block requests to NODE_WITNESS peer are with MSG_WITNESS_FLAG
|
|
# This is true regardless of segwit activation.
|
|
# Also test that we don't ask for blocks from unupgraded peers
|
|
def test_block_relay(self, segwit_activated):
|
|
print("\tTesting block relay")
|
|
|
|
blocktype = 2|MSG_WITNESS_FLAG if segwit_activated else 2
|
|
|
|
# test_node has set NODE_WITNESS, so all getdata requests should be for
|
|
# witness blocks.
|
|
# Test announcing a block via inv results in a getdata, and that
|
|
# announcing a version 4 or random VB block with a header results in a getdata
|
|
block1 = self.build_next_block()
|
|
block1.solve()
|
|
|
|
self.test_node.announce_block_and_wait_for_getdata(block1, use_header=False)
|
|
assert(self.test_node.last_getdata.inv[0].type == blocktype)
|
|
self.test_node.test_witness_block(block1, True)
|
|
|
|
block2 = self.build_next_block(nVersion=4)
|
|
block2.solve()
|
|
|
|
self.test_node.announce_block_and_wait_for_getdata(block2, use_header=True)
|
|
assert(self.test_node.last_getdata.inv[0].type == blocktype)
|
|
self.test_node.test_witness_block(block2, True)
|
|
|
|
block3 = self.build_next_block(nVersion=(VB_TOP_BITS | (1<<15)))
|
|
block3.solve()
|
|
self.test_node.announce_block_and_wait_for_getdata(block3, use_header=True)
|
|
assert(self.test_node.last_getdata.inv[0].type == blocktype)
|
|
self.test_node.test_witness_block(block3, True)
|
|
|
|
# Check that we can getdata for witness blocks or regular blocks,
|
|
# and the right thing happens.
|
|
if segwit_activated == False:
|
|
# Before activation, we should be able to request old blocks with
|
|
# or without witness, and they should be the same.
|
|
chain_height = self.nodes[0].getblockcount()
|
|
# Pick 10 random blocks on main chain, and verify that getdata's
|
|
# for MSG_BLOCK, MSG_WITNESS_BLOCK, and rpc getblock() are equal.
|
|
all_heights = list(range(chain_height+1))
|
|
random.shuffle(all_heights)
|
|
all_heights = all_heights[0:10]
|
|
for height in all_heights:
|
|
block_hash = self.nodes[0].getblockhash(height)
|
|
rpc_block = self.nodes[0].getblock(block_hash, False)
|
|
block_hash = int(block_hash, 16)
|
|
block = self.test_node.request_block(block_hash, 2)
|
|
wit_block = self.test_node.request_block(block_hash, 2|MSG_WITNESS_FLAG)
|
|
assert_equal(block.serialize(True), wit_block.serialize(True))
|
|
assert_equal(block.serialize(), hex_str_to_bytes(rpc_block))
|
|
else:
|
|
# After activation, witness blocks and non-witness blocks should
|
|
# be different. Verify rpc getblock() returns witness blocks, while
|
|
# getdata respects the requested type.
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [])
|
|
# This gives us a witness commitment.
|
|
assert(len(block.vtx[0].wit.vtxinwit) == 1)
|
|
assert(len(block.vtx[0].wit.vtxinwit[0].scriptWitness.stack) == 1)
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
# Now try to retrieve it...
|
|
rpc_block = self.nodes[0].getblock(block.hash, False)
|
|
non_wit_block = self.test_node.request_block(block.sha256, 2)
|
|
wit_block = self.test_node.request_block(block.sha256, 2|MSG_WITNESS_FLAG)
|
|
assert_equal(wit_block.serialize(True), hex_str_to_bytes(rpc_block))
|
|
assert_equal(wit_block.serialize(False), non_wit_block.serialize())
|
|
assert_equal(wit_block.serialize(True), block.serialize(True))
|
|
|
|
# Test size, vsize, weight
|
|
rpc_details = self.nodes[0].getblock(block.hash, True)
|
|
assert_equal(rpc_details["size"], len(block.serialize(True)))
|
|
assert_equal(rpc_details["strippedsize"], len(block.serialize(False)))
|
|
weight = 3*len(block.serialize(False)) + len(block.serialize(True))
|
|
assert_equal(rpc_details["weight"], weight)
|
|
|
|
# Upgraded node should not ask for blocks from unupgraded
|
|
block4 = self.build_next_block(nVersion=4)
|
|
block4.solve()
|
|
self.old_node.getdataset = set()
|
|
# Blocks can be requested via direct-fetch (immediately upon processing the announcement)
|
|
# or via parallel download (with an indeterminate delay from processing the announcement)
|
|
# so to test that a block is NOT requested, we could guess a time period to sleep for,
|
|
# and then check. We can avoid the sleep() by taking advantage of transaction getdata's
|
|
# being processed after block getdata's, and announce a transaction as well,
|
|
# and then check to see if that particular getdata has been received.
|
|
self.old_node.announce_block(block4, use_header=False)
|
|
self.old_node.announce_tx_and_wait_for_getdata(block4.vtx[0])
|
|
assert(block4.sha256 not in self.old_node.getdataset)
|
|
|
|
# V0 segwit outputs should be standard after activation, but not before.
|
|
def test_standardness_v0(self, segwit_activated):
|
|
print("\tTesting standardness of v0 outputs (%s activation)" % ("after" if segwit_activated else "before"))
|
|
assert(len(self.utxo))
|
|
|
|
witness_program = CScript([OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
|
|
p2sh_pubkey = hash160(witness_program)
|
|
p2sh_scriptPubKey = CScript([OP_HASH160, p2sh_pubkey, OP_EQUAL])
|
|
|
|
# First prepare a p2sh output (so that spending it will pass standardness)
|
|
p2sh_tx = CTransaction()
|
|
p2sh_tx.vin = [CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b"")]
|
|
p2sh_tx.vout = [CTxOut(self.utxo[0].nValue-1000, p2sh_scriptPubKey)]
|
|
p2sh_tx.rehash()
|
|
|
|
# Mine it on test_node to create the confirmed output.
|
|
self.test_node.test_transaction_acceptance(p2sh_tx, with_witness=True, accepted=True)
|
|
self.nodes[0].generate(1)
|
|
sync_blocks(self.nodes)
|
|
|
|
# Now test standardness of v0 P2WSH outputs.
|
|
# Start by creating a transaction with two outputs.
|
|
tx = CTransaction()
|
|
tx.vin = [CTxIn(COutPoint(p2sh_tx.sha256, 0), CScript([witness_program]))]
|
|
tx.vout = [CTxOut(p2sh_tx.vout[0].nValue-10000, scriptPubKey)]
|
|
tx.vout.append(CTxOut(8000, scriptPubKey)) # Might burn this later
|
|
tx.rehash()
|
|
|
|
self.std_node.test_transaction_acceptance(tx, with_witness=True, accepted=segwit_activated)
|
|
|
|
# Now create something that looks like a P2PKH output. This won't be spendable.
|
|
scriptPubKey = CScript([OP_0, hash160(witness_hash)])
|
|
tx2 = CTransaction()
|
|
if segwit_activated:
|
|
# if tx was accepted, then we spend the second output.
|
|
tx2.vin = [CTxIn(COutPoint(tx.sha256, 1), b"")]
|
|
tx2.vout = [CTxOut(7000, scriptPubKey)]
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack = [witness_program]
|
|
else:
|
|
# if tx wasn't accepted, we just re-spend the p2sh output we started with.
|
|
tx2.vin = [CTxIn(COutPoint(p2sh_tx.sha256, 0), CScript([witness_program]))]
|
|
tx2.vout = [CTxOut(p2sh_tx.vout[0].nValue-1000, scriptPubKey)]
|
|
tx2.rehash()
|
|
|
|
self.std_node.test_transaction_acceptance(tx2, with_witness=True, accepted=segwit_activated)
|
|
|
|
# Now update self.utxo for later tests.
|
|
tx3 = CTransaction()
|
|
if segwit_activated:
|
|
# tx and tx2 were both accepted. Don't bother trying to reclaim the
|
|
# P2PKH output; just send tx's first output back to an anyone-can-spend.
|
|
sync_mempools(self.nodes)
|
|
tx3.vin = [CTxIn(COutPoint(tx.sha256, 0), b"")]
|
|
tx3.vout = [CTxOut(tx.vout[0].nValue-1000, CScript([OP_TRUE]))]
|
|
tx3.wit.vtxinwit.append(CTxInWitness())
|
|
tx3.wit.vtxinwit[0].scriptWitness.stack = [witness_program]
|
|
tx3.rehash()
|
|
self.test_node.test_transaction_acceptance(tx3, with_witness=True, accepted=True)
|
|
else:
|
|
# tx and tx2 didn't go anywhere; just clean up the p2sh_tx output.
|
|
tx3.vin = [CTxIn(COutPoint(p2sh_tx.sha256, 0), CScript([witness_program]))]
|
|
tx3.vout = [CTxOut(p2sh_tx.vout[0].nValue-1000, witness_program)]
|
|
tx3.rehash()
|
|
self.test_node.test_transaction_acceptance(tx3, with_witness=True, accepted=True)
|
|
|
|
self.nodes[0].generate(1)
|
|
sync_blocks(self.nodes)
|
|
self.utxo.pop(0)
|
|
self.utxo.append(UTXO(tx3.sha256, 0, tx3.vout[0].nValue))
|
|
assert_equal(len(self.nodes[1].getrawmempool()), 0)
|
|
|
|
|
|
# Verify that future segwit upgraded transactions are non-standard,
|
|
# but valid in blocks. Can run this before and after segwit activation.
|
|
def test_segwit_versions(self):
|
|
print("\tTesting standardness/consensus for segwit versions (0-16)")
|
|
assert(len(self.utxo))
|
|
NUM_TESTS = 17 # will test OP_0, OP1, ..., OP_16
|
|
if (len(self.utxo) < NUM_TESTS):
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
split_value = (self.utxo[0].nValue - 4000) // NUM_TESTS
|
|
for i in range(NUM_TESTS):
|
|
tx.vout.append(CTxOut(split_value, CScript([OP_TRUE])))
|
|
tx.rehash()
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
self.utxo.pop(0)
|
|
for i in range(NUM_TESTS):
|
|
self.utxo.append(UTXO(tx.sha256, i, split_value))
|
|
|
|
sync_blocks(self.nodes)
|
|
temp_utxo = []
|
|
tx = CTransaction()
|
|
count = 0
|
|
witness_program = CScript([OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
assert_equal(len(self.nodes[1].getrawmempool()), 0)
|
|
for version in list(range(OP_1, OP_16+1)) + [OP_0]:
|
|
count += 1
|
|
# First try to spend to a future version segwit scriptPubKey.
|
|
scriptPubKey = CScript([CScriptOp(version), witness_hash])
|
|
tx.vin = [CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b"")]
|
|
tx.vout = [CTxOut(self.utxo[0].nValue-1000, scriptPubKey)]
|
|
tx.rehash()
|
|
self.std_node.test_transaction_acceptance(tx, with_witness=True, accepted=False)
|
|
self.test_node.test_transaction_acceptance(tx, with_witness=True, accepted=True)
|
|
self.utxo.pop(0)
|
|
temp_utxo.append(UTXO(tx.sha256, 0, tx.vout[0].nValue))
|
|
|
|
self.nodes[0].generate(1) # Mine all the transactions
|
|
sync_blocks(self.nodes)
|
|
assert(len(self.nodes[0].getrawmempool()) == 0)
|
|
|
|
# Finally, verify that version 0 -> version 1 transactions
|
|
# are non-standard
|
|
scriptPubKey = CScript([CScriptOp(OP_1), witness_hash])
|
|
tx2 = CTransaction()
|
|
tx2.vin = [CTxIn(COutPoint(tx.sha256, 0), b"")]
|
|
tx2.vout = [CTxOut(tx.vout[0].nValue-1000, scriptPubKey)]
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack = [ witness_program ]
|
|
tx2.rehash()
|
|
# Gets accepted to test_node, because standardness of outputs isn't
|
|
# checked with fRequireStandard
|
|
self.test_node.test_transaction_acceptance(tx2, with_witness=True, accepted=True)
|
|
self.std_node.test_transaction_acceptance(tx2, with_witness=True, accepted=False)
|
|
temp_utxo.pop() # last entry in temp_utxo was the output we just spent
|
|
temp_utxo.append(UTXO(tx2.sha256, 0, tx2.vout[0].nValue))
|
|
|
|
# Spend everything in temp_utxo back to an OP_TRUE output.
|
|
tx3 = CTransaction()
|
|
total_value = 0
|
|
for i in temp_utxo:
|
|
tx3.vin.append(CTxIn(COutPoint(i.sha256, i.n), b""))
|
|
tx3.wit.vtxinwit.append(CTxInWitness())
|
|
total_value += i.nValue
|
|
tx3.wit.vtxinwit[-1].scriptWitness.stack = [witness_program]
|
|
tx3.vout.append(CTxOut(total_value - 1000, CScript([OP_TRUE])))
|
|
tx3.rehash()
|
|
# Spending a higher version witness output is not allowed by policy,
|
|
# even with fRequireStandard=false.
|
|
self.test_node.test_transaction_acceptance(tx3, with_witness=True, accepted=False)
|
|
self.test_node.sync_with_ping()
|
|
with mininode_lock:
|
|
assert(b"reserved for soft-fork upgrades" in self.test_node.last_reject.reason)
|
|
|
|
# Building a block with the transaction must be valid, however.
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx2, tx3])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
sync_blocks(self.nodes)
|
|
|
|
# Add utxo to our list
|
|
self.utxo.append(UTXO(tx3.sha256, 0, tx3.vout[0].nValue))
|
|
|
|
|
|
def test_premature_coinbase_witness_spend(self):
|
|
print("\tTesting premature coinbase witness spend")
|
|
block = self.build_next_block()
|
|
# Change the output of the block to be a witness output.
|
|
witness_program = CScript([OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
block.vtx[0].vout[0].scriptPubKey = scriptPubKey
|
|
# This next line will rehash the coinbase and update the merkle
|
|
# root, and solve.
|
|
self.update_witness_block_with_transactions(block, [])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
spend_tx = CTransaction()
|
|
spend_tx.vin = [CTxIn(COutPoint(block.vtx[0].sha256, 0), b"")]
|
|
spend_tx.vout = [CTxOut(block.vtx[0].vout[0].nValue, witness_program)]
|
|
spend_tx.wit.vtxinwit.append(CTxInWitness())
|
|
spend_tx.wit.vtxinwit[0].scriptWitness.stack = [ witness_program ]
|
|
spend_tx.rehash()
|
|
|
|
# Now test a premature spend.
|
|
self.nodes[0].generate(98)
|
|
sync_blocks(self.nodes)
|
|
block2 = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block2, [spend_tx])
|
|
self.test_node.test_witness_block(block2, accepted=False)
|
|
|
|
# Advancing one more block should allow the spend.
|
|
self.nodes[0].generate(1)
|
|
block2 = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block2, [spend_tx])
|
|
self.test_node.test_witness_block(block2, accepted=True)
|
|
sync_blocks(self.nodes)
|
|
|
|
|
|
def test_signature_version_1(self):
|
|
print("\tTesting segwit signature hash version 1")
|
|
key = CECKey()
|
|
key.set_secretbytes(b"9")
|
|
pubkey = CPubKey(key.get_pubkey())
|
|
|
|
witness_program = CScript([pubkey, CScriptOp(OP_CHECKSIG)])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
|
|
# First create a witness output for use in the tests.
|
|
assert(len(self.utxo))
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
tx.vout.append(CTxOut(self.utxo[0].nValue-1000, scriptPubKey))
|
|
tx.rehash()
|
|
|
|
self.test_node.test_transaction_acceptance(tx, with_witness=True, accepted=True)
|
|
# Mine this transaction in preparation for following tests.
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
sync_blocks(self.nodes)
|
|
self.utxo.pop(0)
|
|
|
|
# Add signature for a P2PK witness program.
|
|
def sign_P2PK_witness_input(script, txTo, inIdx, hashtype, value, key):
|
|
tx_hash = SegwitVersion1SignatureHash(script, txTo, inIdx, hashtype, value)
|
|
signature = key.sign(tx_hash) + chr(hashtype).encode('latin-1')
|
|
txTo.wit.vtxinwit[inIdx].scriptWitness.stack = [signature, script]
|
|
txTo.rehash()
|
|
|
|
# Test each hashtype
|
|
prev_utxo = UTXO(tx.sha256, 0, tx.vout[0].nValue)
|
|
for sigflag in [ 0, SIGHASH_ANYONECANPAY ]:
|
|
for hashtype in [SIGHASH_ALL, SIGHASH_NONE, SIGHASH_SINGLE]:
|
|
hashtype |= sigflag
|
|
block = self.build_next_block()
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(prev_utxo.sha256, prev_utxo.n), b""))
|
|
tx.vout.append(CTxOut(prev_utxo.nValue - 1000, scriptPubKey))
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
# Too-large input value
|
|
sign_P2PK_witness_input(witness_program, tx, 0, hashtype, prev_utxo.nValue+1, key)
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Too-small input value
|
|
sign_P2PK_witness_input(witness_program, tx, 0, hashtype, prev_utxo.nValue-1, key)
|
|
block.vtx.pop() # remove last tx
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Now try correct value
|
|
sign_P2PK_witness_input(witness_program, tx, 0, hashtype, prev_utxo.nValue, key)
|
|
block.vtx.pop()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
prev_utxo = UTXO(tx.sha256, 0, tx.vout[0].nValue)
|
|
|
|
# Test combinations of signature hashes.
|
|
# Split the utxo into a lot of outputs.
|
|
# Randomly choose up to 10 to spend, sign with different hashtypes, and
|
|
# output to a random number of outputs. Repeat NUM_TESTS times.
|
|
# Ensure that we've tested a situation where we use SIGHASH_SINGLE with
|
|
# an input index > number of outputs.
|
|
NUM_TESTS = 500
|
|
temp_utxos = []
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(prev_utxo.sha256, prev_utxo.n), b""))
|
|
split_value = prev_utxo.nValue // NUM_TESTS
|
|
for i in range(NUM_TESTS):
|
|
tx.vout.append(CTxOut(split_value, scriptPubKey))
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
sign_P2PK_witness_input(witness_program, tx, 0, SIGHASH_ALL, prev_utxo.nValue, key)
|
|
for i in range(NUM_TESTS):
|
|
temp_utxos.append(UTXO(tx.sha256, i, split_value))
|
|
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
block = self.build_next_block()
|
|
used_sighash_single_out_of_bounds = False
|
|
for i in range(NUM_TESTS):
|
|
# Choose random number of inputs to use.
|
|
num_inputs = random.randint(1, 10)
|
|
# Create a slight bias for producing more utxos
|
|
num_outputs = random.randint(1, 11)
|
|
random.shuffle(temp_utxos)
|
|
assert(len(temp_utxos) > num_inputs)
|
|
tx = CTransaction()
|
|
total_value = 0
|
|
for i in range(num_inputs):
|
|
tx.vin.append(CTxIn(COutPoint(temp_utxos[i].sha256, temp_utxos[i].n), b""))
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
total_value += temp_utxos[i].nValue
|
|
split_value = total_value // num_outputs
|
|
for i in range(num_outputs):
|
|
tx.vout.append(CTxOut(split_value, scriptPubKey))
|
|
for i in range(num_inputs):
|
|
# Now try to sign each input, using a random hashtype.
|
|
anyonecanpay = 0
|
|
if random.randint(0, 1):
|
|
anyonecanpay = SIGHASH_ANYONECANPAY
|
|
hashtype = random.randint(1, 3) | anyonecanpay
|
|
sign_P2PK_witness_input(witness_program, tx, i, hashtype, temp_utxos[i].nValue, key)
|
|
if (hashtype == SIGHASH_SINGLE and i >= num_outputs):
|
|
used_sighash_single_out_of_bounds = True
|
|
tx.rehash()
|
|
for i in range(num_outputs):
|
|
temp_utxos.append(UTXO(tx.sha256, i, split_value))
|
|
temp_utxos = temp_utxos[num_inputs:]
|
|
|
|
block.vtx.append(tx)
|
|
|
|
# Test the block periodically, if we're close to maxblocksize
|
|
if (get_virtual_size(block) > MAX_BLOCK_SIZE - 1000):
|
|
self.update_witness_block_with_transactions(block, [])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
block = self.build_next_block()
|
|
|
|
if (not used_sighash_single_out_of_bounds):
|
|
print("WARNING: this test run didn't attempt SIGHASH_SINGLE with out-of-bounds index value")
|
|
# Test the transactions we've added to the block
|
|
if (len(block.vtx) > 1):
|
|
self.update_witness_block_with_transactions(block, [])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
# Now test witness version 0 P2PKH transactions
|
|
pubkeyhash = hash160(pubkey)
|
|
scriptPKH = CScript([OP_0, pubkeyhash])
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(temp_utxos[0].sha256, temp_utxos[0].n), b""))
|
|
tx.vout.append(CTxOut(temp_utxos[0].nValue, scriptPKH))
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
sign_P2PK_witness_input(witness_program, tx, 0, SIGHASH_ALL, temp_utxos[0].nValue, key)
|
|
tx2 = CTransaction()
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, 0), b""))
|
|
tx2.vout.append(CTxOut(tx.vout[0].nValue, CScript([OP_TRUE])))
|
|
|
|
script = CScript([CScriptOp(OP_DUP), CScriptOp(OP_HASH160), pubkeyhash, CScriptOp(OP_EQUALVERIFY), CScriptOp(OP_CHECKSIG)])
|
|
sig_hash = SegwitVersion1SignatureHash(script, tx2, 0, SIGHASH_ALL, tx.vout[0].nValue)
|
|
signature = key.sign(sig_hash) + b'\x01' # 0x1 is SIGHASH_ALL
|
|
|
|
# Check that we can't have a scriptSig
|
|
tx2.vin[0].scriptSig = CScript([signature, pubkey])
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx, tx2])
|
|
self.test_node.test_witness_block(block, accepted=False)
|
|
|
|
# Move the signature to the witness.
|
|
block.vtx.pop()
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[0].scriptWitness.stack = [signature, pubkey]
|
|
tx2.vin[0].scriptSig = b""
|
|
tx2.rehash()
|
|
|
|
self.update_witness_block_with_transactions(block, [tx2])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
temp_utxos.pop(0)
|
|
|
|
# Update self.utxos for later tests. Just spend everything in
|
|
# temp_utxos to a corresponding entry in self.utxos
|
|
tx = CTransaction()
|
|
index = 0
|
|
for i in temp_utxos:
|
|
# Just spend to our usual anyone-can-spend output
|
|
# Use SIGHASH_SINGLE|SIGHASH_ANYONECANPAY so we can build up
|
|
# the signatures as we go.
|
|
tx.vin.append(CTxIn(COutPoint(i.sha256, i.n), b""))
|
|
tx.vout.append(CTxOut(i.nValue, CScript([OP_TRUE])))
|
|
tx.wit.vtxinwit.append(CTxInWitness())
|
|
sign_P2PK_witness_input(witness_program, tx, index, SIGHASH_SINGLE|SIGHASH_ANYONECANPAY, i.nValue, key)
|
|
index += 1
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
|
|
for i in range(len(tx.vout)):
|
|
self.utxo.append(UTXO(tx.sha256, i, tx.vout[i].nValue))
|
|
|
|
|
|
# Test P2SH wrapped witness programs.
|
|
def test_p2sh_witness(self, segwit_activated):
|
|
print("\tTesting P2SH witness transactions")
|
|
|
|
assert(len(self.utxo))
|
|
|
|
# Prepare the p2sh-wrapped witness output
|
|
witness_program = CScript([OP_DROP, OP_TRUE])
|
|
witness_hash = sha256(witness_program)
|
|
p2wsh_pubkey = CScript([OP_0, witness_hash])
|
|
p2sh_witness_hash = hash160(p2wsh_pubkey)
|
|
scriptPubKey = CScript([OP_HASH160, p2sh_witness_hash, OP_EQUAL])
|
|
scriptSig = CScript([p2wsh_pubkey]) # a push of the redeem script
|
|
|
|
# Fund the P2SH output
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
tx.vout.append(CTxOut(self.utxo[0].nValue-1000, scriptPubKey))
|
|
tx.rehash()
|
|
|
|
# Verify mempool acceptance and block validity
|
|
self.test_node.test_transaction_acceptance(tx, with_witness=False, accepted=True)
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [tx])
|
|
self.test_node.test_witness_block(block, accepted=True, with_witness=segwit_activated)
|
|
sync_blocks(self.nodes)
|
|
|
|
# Now test attempts to spend the output.
|
|
spend_tx = CTransaction()
|
|
spend_tx.vin.append(CTxIn(COutPoint(tx.sha256, 0), scriptSig))
|
|
spend_tx.vout.append(CTxOut(tx.vout[0].nValue-1000, CScript([OP_TRUE])))
|
|
spend_tx.rehash()
|
|
|
|
# This transaction should not be accepted into the mempool pre- or
|
|
# post-segwit. Mempool acceptance will use SCRIPT_VERIFY_WITNESS which
|
|
# will require a witness to spend a witness program regardless of
|
|
# segwit activation. Note that older bitcoind's that are not
|
|
# segwit-aware would also reject this for failing CLEANSTACK.
|
|
self.test_node.test_transaction_acceptance(spend_tx, with_witness=False, accepted=False)
|
|
|
|
# Try to put the witness script in the scriptSig, should also fail.
|
|
spend_tx.vin[0].scriptSig = CScript([p2wsh_pubkey, b'a'])
|
|
spend_tx.rehash()
|
|
self.test_node.test_transaction_acceptance(spend_tx, with_witness=False, accepted=False)
|
|
|
|
# Now put the witness script in the witness, should succeed after
|
|
# segwit activates.
|
|
spend_tx.vin[0].scriptSig = scriptSig
|
|
spend_tx.rehash()
|
|
spend_tx.wit.vtxinwit.append(CTxInWitness())
|
|
spend_tx.wit.vtxinwit[0].scriptWitness.stack = [ b'a', witness_program ]
|
|
|
|
# Verify mempool acceptance
|
|
self.test_node.test_transaction_acceptance(spend_tx, with_witness=True, accepted=segwit_activated)
|
|
block = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block, [spend_tx])
|
|
|
|
# If we're before activation, then sending this without witnesses
|
|
# should be valid. If we're after activation, then sending this with
|
|
# witnesses should be valid.
|
|
if segwit_activated:
|
|
self.test_node.test_witness_block(block, accepted=True)
|
|
else:
|
|
self.test_node.test_witness_block(block, accepted=True, with_witness=False)
|
|
|
|
# Update self.utxo
|
|
self.utxo.pop(0)
|
|
self.utxo.append(UTXO(spend_tx.sha256, 0, spend_tx.vout[0].nValue))
|
|
|
|
# Test the behavior of starting up a segwit-aware node after the softfork
|
|
# has activated. As segwit requires different block data than pre-segwit
|
|
# nodes would have stored, this requires special handling.
|
|
# To enable this test, pass --oldbinary=<path-to-pre-segwit-bitcoind> to
|
|
# the test.
|
|
def test_upgrade_after_activation(self, node, node_id):
|
|
print("\tTesting software upgrade after softfork activation")
|
|
|
|
assert(node_id != 0) # node0 is assumed to be a segwit-active bitcoind
|
|
|
|
# Make sure the nodes are all up
|
|
sync_blocks(self.nodes)
|
|
|
|
# Restart with the new binary
|
|
stop_node(node, node_id)
|
|
self.nodes[node_id] = start_node(node_id, self.options.tmpdir, ["-debug"])
|
|
connect_nodes(self.nodes[0], node_id)
|
|
|
|
sync_blocks(self.nodes)
|
|
|
|
# Make sure that this peer thinks segwit has activated.
|
|
assert(get_bip9_status(node, 'segwit')['status'] == "active")
|
|
|
|
# Make sure this peers blocks match those of node0.
|
|
height = node.getblockcount()
|
|
while height >= 0:
|
|
block_hash = node.getblockhash(height)
|
|
assert_equal(block_hash, self.nodes[0].getblockhash(height))
|
|
assert_equal(self.nodes[0].getblock(block_hash), node.getblock(block_hash))
|
|
height -= 1
|
|
|
|
|
|
def test_witness_sigops(self):
|
|
'''Ensure sigop counting is correct inside witnesses.'''
|
|
print("\tTesting sigops limit")
|
|
|
|
assert(len(self.utxo))
|
|
|
|
# Keep this under MAX_OPS_PER_SCRIPT (201)
|
|
witness_program = CScript([OP_TRUE, OP_IF, OP_TRUE, OP_ELSE] + [OP_CHECKMULTISIG]*5 + [OP_CHECKSIG]*193 + [OP_ENDIF])
|
|
witness_hash = sha256(witness_program)
|
|
scriptPubKey = CScript([OP_0, witness_hash])
|
|
|
|
sigops_per_script = 20*5 + 193*1
|
|
# We'll produce 2 extra outputs, one with a program that would take us
|
|
# over max sig ops, and one with a program that would exactly reach max
|
|
# sig ops
|
|
outputs = (MAX_SIGOP_COST // sigops_per_script) + 2
|
|
extra_sigops_available = MAX_SIGOP_COST % sigops_per_script
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|
|
|
# We chose the number of checkmultisigs/checksigs to make this work:
|
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assert(extra_sigops_available < 100) # steer clear of MAX_OPS_PER_SCRIPT
|
|
|
|
# This script, when spent with the first
|
|
# N(=MAX_SIGOP_COST//sigops_per_script) outputs of our transaction,
|
|
# would push us just over the block sigop limit.
|
|
witness_program_toomany = CScript([OP_TRUE, OP_IF, OP_TRUE, OP_ELSE] + [OP_CHECKSIG]*(extra_sigops_available + 1) + [OP_ENDIF])
|
|
witness_hash_toomany = sha256(witness_program_toomany)
|
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scriptPubKey_toomany = CScript([OP_0, witness_hash_toomany])
|
|
|
|
# If we spend this script instead, we would exactly reach our sigop
|
|
# limit (for witness sigops).
|
|
witness_program_justright = CScript([OP_TRUE, OP_IF, OP_TRUE, OP_ELSE] + [OP_CHECKSIG]*(extra_sigops_available) + [OP_ENDIF])
|
|
witness_hash_justright = sha256(witness_program_justright)
|
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scriptPubKey_justright = CScript([OP_0, witness_hash_justright])
|
|
|
|
# First split our available utxo into a bunch of outputs
|
|
split_value = self.utxo[0].nValue // outputs
|
|
tx = CTransaction()
|
|
tx.vin.append(CTxIn(COutPoint(self.utxo[0].sha256, self.utxo[0].n), b""))
|
|
for i in range(outputs):
|
|
tx.vout.append(CTxOut(split_value, scriptPubKey))
|
|
tx.vout[-2].scriptPubKey = scriptPubKey_toomany
|
|
tx.vout[-1].scriptPubKey = scriptPubKey_justright
|
|
tx.rehash()
|
|
|
|
block_1 = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block_1, [tx])
|
|
self.test_node.test_witness_block(block_1, accepted=True)
|
|
|
|
tx2 = CTransaction()
|
|
# If we try to spend the first n-1 outputs from tx, that should be
|
|
# too many sigops.
|
|
total_value = 0
|
|
for i in range(outputs-1):
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, i), b""))
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[-1].scriptWitness.stack = [ witness_program ]
|
|
total_value += tx.vout[i].nValue
|
|
tx2.wit.vtxinwit[-1].scriptWitness.stack = [ witness_program_toomany ]
|
|
tx2.vout.append(CTxOut(total_value, CScript([OP_TRUE])))
|
|
tx2.rehash()
|
|
|
|
block_2 = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block_2, [tx2])
|
|
self.test_node.test_witness_block(block_2, accepted=False)
|
|
|
|
# Try dropping the last input in tx2, and add an output that has
|
|
# too many sigops (contributing to legacy sigop count).
|
|
checksig_count = (extra_sigops_available // 4) + 1
|
|
scriptPubKey_checksigs = CScript([OP_CHECKSIG]*checksig_count)
|
|
tx2.vout.append(CTxOut(0, scriptPubKey_checksigs));
|
|
tx2.vin.pop()
|
|
tx2.wit.vtxinwit.pop()
|
|
tx2.vout[0].nValue -= tx.vout[-2].nValue
|
|
tx2.rehash()
|
|
block_3 = self.build_next_block()
|
|
self.update_witness_block_with_transactions(block_3, [tx2])
|
|
self.test_node.test_witness_block(block_3, accepted=False)
|
|
|
|
# If we drop the last checksig in this output, the tx should succeed.
|
|
block_4 = self.build_next_block()
|
|
tx2.vout[-1].scriptPubKey = CScript([OP_CHECKSIG]*(checksig_count-1))
|
|
tx2.rehash()
|
|
self.update_witness_block_with_transactions(block_4, [tx2])
|
|
self.test_node.test_witness_block(block_4, accepted=True)
|
|
|
|
# Reset the tip back down for the next test
|
|
sync_blocks(self.nodes)
|
|
for x in self.nodes:
|
|
x.invalidateblock(block_4.hash)
|
|
|
|
# Try replacing the last input of tx2 to be spending the last
|
|
# output of tx
|
|
block_5 = self.build_next_block()
|
|
tx2.vout.pop()
|
|
tx2.vin.append(CTxIn(COutPoint(tx.sha256, outputs-1), b""))
|
|
tx2.wit.vtxinwit.append(CTxInWitness())
|
|
tx2.wit.vtxinwit[-1].scriptWitness.stack = [ witness_program_justright ]
|
|
tx2.rehash()
|
|
self.update_witness_block_with_transactions(block_5, [tx2])
|
|
self.test_node.test_witness_block(block_5, accepted=True)
|
|
|
|
# TODO: test p2sh sigop counting
|
|
|
|
def test_getblocktemplate_before_lockin(self):
|
|
print("\tTesting getblocktemplate setting of segwit versionbit (before lockin)")
|
|
block_version = (self.nodes[0].getblocktemplate())['version']
|
|
assert_equal(block_version & (1 << VB_WITNESS_BIT), 0)
|
|
|
|
# Workaround:
|
|
# Can either change the tip, or change the mempool and wait 5 seconds
|
|
# to trigger a recomputation of getblocktemplate.
|
|
self.nodes[0].sendtoaddress(self.nodes[0].getnewaddress(), 1)
|
|
# Using mocktime lets us avoid sleep()
|
|
self.nodes[0].setmocktime(int(time.time())+10)
|
|
|
|
block_version = self.nodes[0].getblocktemplate({"rules" : ["segwit"]})['version']
|
|
assert(block_version & (1 << VB_WITNESS_BIT) != 0)
|
|
self.nodes[0].setmocktime(0) # undo mocktime
|
|
|
|
def run_test(self):
|
|
# Setup the p2p connections and start up the network thread.
|
|
self.test_node = TestNode() # sets NODE_WITNESS|NODE_NETWORK
|
|
self.old_node = TestNode() # only NODE_NETWORK
|
|
self.std_node = TestNode() # for testing node1 (fRequireStandard=true)
|
|
|
|
self.p2p_connections = [self.test_node, self.old_node]
|
|
|
|
self.connections = []
|
|
self.connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], self.test_node, services=NODE_NETWORK|NODE_WITNESS))
|
|
self.connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], self.old_node, services=NODE_NETWORK))
|
|
self.connections.append(NodeConn('127.0.0.1', p2p_port(1), self.nodes[1], self.std_node, services=NODE_NETWORK|NODE_WITNESS))
|
|
self.test_node.add_connection(self.connections[0])
|
|
self.old_node.add_connection(self.connections[1])
|
|
self.std_node.add_connection(self.connections[2])
|
|
|
|
NetworkThread().start() # Start up network handling in another thread
|
|
|
|
# Keep a place to store utxo's that can be used in later tests
|
|
self.utxo = []
|
|
|
|
# Test logic begins here
|
|
self.test_node.wait_for_verack()
|
|
|
|
print("\nStarting tests before segwit lock in:")
|
|
|
|
self.test_witness_services() # Verifies NODE_WITNESS
|
|
self.test_non_witness_transaction() # non-witness tx's are accepted
|
|
self.test_unnecessary_witness_before_segwit_activation()
|
|
self.test_block_relay(segwit_activated=False)
|
|
|
|
# Advance to segwit being 'started'
|
|
self.advance_to_segwit_started()
|
|
self.test_getblocktemplate_before_lockin()
|
|
|
|
sync_blocks(self.nodes)
|
|
|
|
# At lockin, nothing should change.
|
|
print("\nTesting behavior post lockin, pre-activation")
|
|
self.advance_to_segwit_lockin()
|
|
|
|
# Retest unnecessary witnesses
|
|
self.test_unnecessary_witness_before_segwit_activation()
|
|
self.test_witness_tx_relay_before_segwit_activation()
|
|
self.test_block_relay(segwit_activated=False)
|
|
self.test_p2sh_witness(segwit_activated=False)
|
|
self.test_standardness_v0(segwit_activated=False)
|
|
|
|
sync_blocks(self.nodes)
|
|
|
|
# Now activate segwit
|
|
print("\nTesting behavior after segwit activation")
|
|
self.advance_to_segwit_active()
|
|
|
|
sync_blocks(self.nodes)
|
|
|
|
# Test P2SH witness handling again
|
|
self.test_p2sh_witness(segwit_activated=True)
|
|
self.test_witness_commitments()
|
|
self.test_block_malleability()
|
|
self.test_witness_block_size()
|
|
self.test_submit_block()
|
|
self.test_extra_witness_data()
|
|
self.test_max_witness_push_length()
|
|
self.test_max_witness_program_length()
|
|
self.test_witness_input_length()
|
|
self.test_block_relay(segwit_activated=True)
|
|
self.test_tx_relay_after_segwit_activation()
|
|
self.test_standardness_v0(segwit_activated=True)
|
|
self.test_segwit_versions()
|
|
self.test_premature_coinbase_witness_spend()
|
|
self.test_signature_version_1()
|
|
sync_blocks(self.nodes)
|
|
if self.test_upgrade:
|
|
self.test_upgrade_after_activation(self.nodes[2], 2)
|
|
else:
|
|
print("\tSkipping upgrade-after-activation test (use --oldbinary to enable)")
|
|
self.test_witness_sigops()
|
|
|
|
|
|
if __name__ == '__main__':
|
|
SegWitTest().main()
|