diff options
Diffstat (limited to 'qa/rpc-tests')
| -rwxr-xr-x | qa/rpc-tests/p2p-compactblocks.py | 608 |
1 files changed, 608 insertions, 0 deletions
diff --git a/qa/rpc-tests/p2p-compactblocks.py b/qa/rpc-tests/p2p-compactblocks.py new file mode 100755 index 0000000000..7fe7ecc16c --- /dev/null +++ b/qa/rpc-tests/p2p-compactblocks.py @@ -0,0 +1,608 @@ +#!/usr/bin/env python3 +# Copyright (c) 2016 The Bitcoin Core developers +# Distributed under the MIT software license, see the accompanying +# file COPYING or http://www.opensource.org/licenses/mit-license.php. + +from test_framework.mininode import * +from test_framework.test_framework import BitcoinTestFramework +from test_framework.util import * +from test_framework.blocktools import create_block, create_coinbase +from test_framework.siphash import siphash256 +from test_framework.script import CScript, OP_TRUE + +''' +CompactBlocksTest -- test compact blocks (BIP 152) +''' + + +# TestNode: A peer we use to send messages to bitcoind, and store responses. +class TestNode(SingleNodeConnCB): + def __init__(self): + SingleNodeConnCB.__init__(self) + self.last_sendcmpct = None + self.last_headers = None + self.last_inv = None + self.last_cmpctblock = None + self.block_announced = False + self.last_getdata = None + self.last_getblocktxn = None + self.last_block = None + self.last_blocktxn = None + + def on_sendcmpct(self, conn, message): + self.last_sendcmpct = message + + def on_block(self, conn, message): + self.last_block = message + + def on_cmpctblock(self, conn, message): + self.last_cmpctblock = message + self.block_announced = True + + def on_headers(self, conn, message): + self.last_headers = message + self.block_announced = True + + def on_inv(self, conn, message): + self.last_inv = message + self.block_announced = True + + def on_getdata(self, conn, message): + self.last_getdata = message + + def on_getblocktxn(self, conn, message): + self.last_getblocktxn = message + + def on_blocktxn(self, conn, message): + self.last_blocktxn = message + + # Requires caller to hold mininode_lock + def received_block_announcement(self): + return self.block_announced + + def clear_block_announcement(self): + with mininode_lock: + self.block_announced = False + self.last_inv = None + self.last_headers = None + self.last_cmpctblock = None + + def get_headers(self, locator, hashstop): + msg = msg_getheaders() + msg.locator.vHave = locator + msg.hashstop = hashstop + self.connection.send_message(msg) + + def send_header_for_blocks(self, new_blocks): + headers_message = msg_headers() + headers_message.headers = [CBlockHeader(b) for b in new_blocks] + self.send_message(headers_message) + + +class CompactBlocksTest(BitcoinTestFramework): + def __init__(self): + super().__init__() + self.setup_clean_chain = True + self.num_nodes = 1 + self.utxos = [] + + def setup_network(self): + self.nodes = [] + + # Turn off segwit in this test, as compact blocks don't currently work + # with segwit. (After BIP 152 is updated to support segwit, we can + # test behavior with and without segwit enabled by adding a second node + # to the test.) + self.nodes = start_nodes(self.num_nodes, self.options.tmpdir, [["-debug", "-logtimemicros=1", "-bip9params=segwit:0:0"]]) + + def build_block_on_tip(self): + height = self.nodes[0].getblockcount() + tip = self.nodes[0].getbestblockhash() + mtp = self.nodes[0].getblockheader(tip)['mediantime'] + block = create_block(int(tip, 16), create_coinbase(height + 1), mtp + 1) + block.solve() + return block + + # Create 10 more anyone-can-spend utxo's for testing. + def make_utxos(self): + block = self.build_block_on_tip() + self.test_node.send_and_ping(msg_block(block)) + assert(int(self.nodes[0].getbestblockhash(), 16) == block.sha256) + self.nodes[0].generate(100) + + total_value = block.vtx[0].vout[0].nValue + out_value = total_value // 10 + tx = CTransaction() + tx.vin.append(CTxIn(COutPoint(block.vtx[0].sha256, 0), b'')) + for i in range(10): + tx.vout.append(CTxOut(out_value, CScript([OP_TRUE]))) + tx.rehash() + + block2 = self.build_block_on_tip() + block2.vtx.append(tx) + block2.hashMerkleRoot = block2.calc_merkle_root() + block2.solve() + self.test_node.send_and_ping(msg_block(block2)) + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block2.sha256) + self.utxos.extend([[tx.sha256, i, out_value] for i in range(10)]) + return + + # Test "sendcmpct": + # - No compact block announcements or getdata(MSG_CMPCT_BLOCK) unless + # sendcmpct is sent. + # - If sendcmpct is sent with version > 0, the message is ignored. + # - If sendcmpct is sent with boolean 0, then block announcements are not + # made with compact blocks. + # - If sendcmpct is then sent with boolean 1, then new block announcements + # are made with compact blocks. + def test_sendcmpct(self): + print("Testing SENDCMPCT p2p message... ") + + # Make sure we get a version 0 SENDCMPCT message from our peer + def received_sendcmpct(): + return (self.test_node.last_sendcmpct is not None) + got_message = wait_until(received_sendcmpct, timeout=30) + assert(got_message) + assert_equal(self.test_node.last_sendcmpct.version, 1) + + tip = int(self.nodes[0].getbestblockhash(), 16) + + def check_announcement_of_new_block(node, peer, predicate): + self.test_node.clear_block_announcement() + node.generate(1) + got_message = wait_until(peer.received_block_announcement, timeout=30) + assert(got_message) + with mininode_lock: + assert(predicate) + + # We shouldn't get any block announcements via cmpctblock yet. + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is None) + + # Try one more time, this time after requesting headers. + self.test_node.clear_block_announcement() + self.test_node.get_headers(locator=[tip], hashstop=0) + wait_until(self.test_node.received_block_announcement, timeout=30) + self.test_node.clear_block_announcement() + + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is None and self.test_node.last_inv is not None) + + # Now try a SENDCMPCT message with too-high version + sendcmpct = msg_sendcmpct() + sendcmpct.version = 2 + self.test_node.send_message(sendcmpct) + + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is None) + + # Now try a SENDCMPCT message with valid version, but announce=False + self.test_node.send_message(msg_sendcmpct()) + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is None) + + # Finally, try a SENDCMPCT message with announce=True + sendcmpct.version = 1 + sendcmpct.announce = True + self.test_node.send_message(sendcmpct) + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is not None) + + # Try one more time + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is not None) + + # Try one more time, after turning on sendheaders + self.test_node.send_message(msg_sendheaders()) + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is not None) + + # Now turn off announcements + sendcmpct.announce = False + check_announcement_of_new_block(self.nodes[0], self.test_node, lambda: self.test_node.last_cmpctblock is None and self.test_node.last_headers is not None) + + # This test actually causes bitcoind to (reasonably!) disconnect us, so do this last. + def test_invalid_cmpctblock_message(self): + print("Testing invalid index in cmpctblock message...") + self.nodes[0].generate(101) + block = self.build_block_on_tip() + + cmpct_block = P2PHeaderAndShortIDs() + cmpct_block.header = CBlockHeader(block) + cmpct_block.prefilled_txn_length = 1 + # This index will be too high + prefilled_txn = PrefilledTransaction(1, block.vtx[0]) + cmpct_block.prefilled_txn = [prefilled_txn] + self.test_node.send_and_ping(msg_cmpctblock(cmpct_block)) + assert(int(self.nodes[0].getbestblockhash(), 16) == block.hashPrevBlock) + + # Compare the generated shortids to what we expect based on BIP 152, given + # bitcoind's choice of nonce. + def test_compactblock_construction(self): + print("Testing compactblock headers and shortIDs are correct...") + + # Generate a bunch of transactions. + self.nodes[0].generate(101) + num_transactions = 25 + address = self.nodes[0].getnewaddress() + for i in range(num_transactions): + self.nodes[0].sendtoaddress(address, 0.1) + + # Now mine a block, and look at the resulting compact block. + self.test_node.clear_block_announcement() + block_hash = int(self.nodes[0].generate(1)[0], 16) + + # Store the raw block in our internal format. + block = FromHex(CBlock(), self.nodes[0].getblock("%02x" % block_hash, False)) + [tx.calc_sha256() for tx in block.vtx] + block.rehash() + + # Don't care which type of announcement came back for this test; just + # request the compact block if we didn't get one yet. + wait_until(self.test_node.received_block_announcement, timeout=30) + + with mininode_lock: + if self.test_node.last_cmpctblock is None: + self.test_node.clear_block_announcement() + inv = CInv(4, block_hash) # 4 == "CompactBlock" + self.test_node.send_message(msg_getdata([inv])) + + wait_until(self.test_node.received_block_announcement, timeout=30) + + # Now we should have the compactblock + header_and_shortids = None + with mininode_lock: + assert(self.test_node.last_cmpctblock is not None) + # Convert the on-the-wire representation to absolute indexes + header_and_shortids = HeaderAndShortIDs(self.test_node.last_cmpctblock.header_and_shortids) + + # Check that we got the right block! + header_and_shortids.header.calc_sha256() + assert_equal(header_and_shortids.header.sha256, block_hash) + + # Make sure the prefilled_txn appears to have included the coinbase + assert(len(header_and_shortids.prefilled_txn) >= 1) + assert_equal(header_and_shortids.prefilled_txn[0].index, 0) + + # Check that all prefilled_txn entries match what's in the block. + for entry in header_and_shortids.prefilled_txn: + entry.tx.calc_sha256() + assert_equal(entry.tx.sha256, block.vtx[entry.index].sha256) + + # Check that the cmpctblock message announced all the transactions. + assert_equal(len(header_and_shortids.prefilled_txn) + len(header_and_shortids.shortids), len(block.vtx)) + + # And now check that all the shortids are as expected as well. + # Determine the siphash keys to use. + [k0, k1] = header_and_shortids.get_siphash_keys() + + index = 0 + while index < len(block.vtx): + if (len(header_and_shortids.prefilled_txn) > 0 and + header_and_shortids.prefilled_txn[0].index == index): + # Already checked prefilled transactions above + header_and_shortids.prefilled_txn.pop(0) + else: + shortid = calculate_shortid(k0, k1, block.vtx[index].sha256) + assert_equal(shortid, header_and_shortids.shortids[0]) + header_and_shortids.shortids.pop(0) + index += 1 + + # Test that bitcoind requests compact blocks when we announce new blocks + # via header or inv, and that responding to getblocktxn causes the block + # to be successfully reconstructed. + def test_compactblock_requests(self): + print("Testing compactblock requests... ") + + # Try announcing a block with an inv or header, expect a compactblock + # request + for announce in ["inv", "header"]: + block = self.build_block_on_tip() + with mininode_lock: + self.test_node.last_getdata = None + + if announce == "inv": + self.test_node.send_message(msg_inv([CInv(2, block.sha256)])) + else: + self.test_node.send_header_for_blocks([block]) + success = wait_until(lambda: self.test_node.last_getdata is not None, timeout=30) + assert(success) + assert_equal(len(self.test_node.last_getdata.inv), 1) + assert_equal(self.test_node.last_getdata.inv[0].type, 4) + assert_equal(self.test_node.last_getdata.inv[0].hash, block.sha256) + + # Send back a compactblock message that omits the coinbase + comp_block = HeaderAndShortIDs() + comp_block.header = CBlockHeader(block) + comp_block.nonce = 0 + comp_block.shortids = [1] # this is useless, and wrong + self.test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p())) + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.hashPrevBlock) + # Expect a getblocktxn message. + with mininode_lock: + assert(self.test_node.last_getblocktxn is not None) + absolute_indexes = self.test_node.last_getblocktxn.block_txn_request.to_absolute() + assert_equal(absolute_indexes, [0]) # should be a coinbase request + + # Send the coinbase, and verify that the tip advances. + msg = msg_blocktxn() + msg.block_transactions.blockhash = block.sha256 + msg.block_transactions.transactions = [block.vtx[0]] + self.test_node.send_and_ping(msg) + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256) + + # Create a chain of transactions from given utxo, and add to a new block. + def build_block_with_transactions(self, utxo, num_transactions): + block = self.build_block_on_tip() + + for i in range(num_transactions): + tx = CTransaction() + tx.vin.append(CTxIn(COutPoint(utxo[0], utxo[1]), b'')) + tx.vout.append(CTxOut(utxo[2] - 1000, CScript([OP_TRUE]))) + tx.rehash() + utxo = [tx.sha256, 0, tx.vout[0].nValue] + block.vtx.append(tx) + + block.hashMerkleRoot = block.calc_merkle_root() + block.solve() + return block + + # Test that we only receive getblocktxn requests for transactions that the + # node needs, and that responding to them causes the block to be + # reconstructed. + def test_getblocktxn_requests(self): + print("Testing getblocktxn requests...") + + # First try announcing compactblocks that won't reconstruct, and verify + # that we receive getblocktxn messages back. + utxo = self.utxos.pop(0) + + block = self.build_block_with_transactions(utxo, 5) + self.utxos.append([block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue]) + + comp_block = HeaderAndShortIDs() + comp_block.initialize_from_block(block) + + self.test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p())) + with mininode_lock: + assert(self.test_node.last_getblocktxn is not None) + absolute_indexes = self.test_node.last_getblocktxn.block_txn_request.to_absolute() + assert_equal(absolute_indexes, [1, 2, 3, 4, 5]) + msg = msg_blocktxn() + msg.block_transactions = BlockTransactions(block.sha256, block.vtx[1:]) + self.test_node.send_and_ping(msg) + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256) + + utxo = self.utxos.pop(0) + block = self.build_block_with_transactions(utxo, 5) + self.utxos.append([block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue]) + + # Now try interspersing the prefilled transactions + comp_block.initialize_from_block(block, prefill_list=[0, 1, 5]) + self.test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p())) + with mininode_lock: + assert(self.test_node.last_getblocktxn is not None) + absolute_indexes = self.test_node.last_getblocktxn.block_txn_request.to_absolute() + assert_equal(absolute_indexes, [2, 3, 4]) + msg.block_transactions = BlockTransactions(block.sha256, block.vtx[2:5]) + self.test_node.send_and_ping(msg) + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256) + + # Now try giving one transaction ahead of time. + utxo = self.utxos.pop(0) + block = self.build_block_with_transactions(utxo, 5) + self.utxos.append([block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue]) + self.test_node.send_and_ping(msg_tx(block.vtx[1])) + assert(block.vtx[1].hash in self.nodes[0].getrawmempool()) + + # Prefill 4 out of the 6 transactions, and verify that only the one + # that was not in the mempool is requested. + comp_block.initialize_from_block(block, prefill_list=[0, 2, 3, 4]) + self.test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p())) + with mininode_lock: + assert(self.test_node.last_getblocktxn is not None) + absolute_indexes = self.test_node.last_getblocktxn.block_txn_request.to_absolute() + assert_equal(absolute_indexes, [5]) + + msg.block_transactions = BlockTransactions(block.sha256, [block.vtx[5]]) + self.test_node.send_and_ping(msg) + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256) + + # Now provide all transactions to the node before the block is + # announced and verify reconstruction happens immediately. + utxo = self.utxos.pop(0) + block = self.build_block_with_transactions(utxo, 10) + self.utxos.append([block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue]) + for tx in block.vtx[1:]: + self.test_node.send_message(msg_tx(tx)) + self.test_node.sync_with_ping() + # Make sure all transactions were accepted. + mempool = self.nodes[0].getrawmempool() + for tx in block.vtx[1:]: + assert(tx.hash in mempool) + + # Clear out last request. + with mininode_lock: + self.test_node.last_getblocktxn = None + + # Send compact block + comp_block.initialize_from_block(block, prefill_list=[0]) + self.test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p())) + with mininode_lock: + # Shouldn't have gotten a request for any transaction + assert(self.test_node.last_getblocktxn is None) + # Tip should have updated + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256) + + # Incorrectly responding to a getblocktxn shouldn't cause the block to be + # permanently failed. + def test_incorrect_blocktxn_response(self): + print("Testing handling of incorrect blocktxn responses...") + + if (len(self.utxos) == 0): + self.make_utxos() + utxo = self.utxos.pop(0) + + block = self.build_block_with_transactions(utxo, 10) + self.utxos.append([block.vtx[-1].sha256, 0, block.vtx[-1].vout[0].nValue]) + # Relay the first 5 transactions from the block in advance + for tx in block.vtx[1:6]: + self.test_node.send_message(msg_tx(tx)) + self.test_node.sync_with_ping() + # Make sure all transactions were accepted. + mempool = self.nodes[0].getrawmempool() + for tx in block.vtx[1:6]: + assert(tx.hash in mempool) + + # Send compact block + comp_block = HeaderAndShortIDs() + comp_block.initialize_from_block(block, prefill_list=[0]) + self.test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p())) + absolute_indexes = [] + with mininode_lock: + assert(self.test_node.last_getblocktxn is not None) + absolute_indexes = self.test_node.last_getblocktxn.block_txn_request.to_absolute() + assert_equal(absolute_indexes, [6, 7, 8, 9, 10]) + + # Now give an incorrect response. + # Note that it's possible for bitcoind to be smart enough to know we're + # lying, since it could check to see if the shortid matches what we're + # sending, and eg disconnect us for misbehavior. If that behavior + # change were made, we could just modify this test by having a + # different peer provide the block further down, so that we're still + # verifying that the block isn't marked bad permanently. This is good + # enough for now. + msg = msg_blocktxn() + msg.block_transactions = BlockTransactions(block.sha256, [block.vtx[5]] + block.vtx[7:]) + self.test_node.send_and_ping(msg) + + # Tip should not have updated + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.hashPrevBlock) + + # We should receive a getdata request + success = wait_until(lambda: self.test_node.last_getdata is not None, timeout=10) + assert(success) + assert_equal(len(self.test_node.last_getdata.inv), 1) + assert_equal(self.test_node.last_getdata.inv[0].type, 2) + assert_equal(self.test_node.last_getdata.inv[0].hash, block.sha256) + + # Deliver the block + self.test_node.send_and_ping(msg_block(block)) + assert_equal(int(self.nodes[0].getbestblockhash(), 16), block.sha256) + + def test_getblocktxn_handler(self): + print("Testing getblocktxn handler...") + + # bitcoind won't respond for blocks whose height is more than 15 blocks + # deep. + MAX_GETBLOCKTXN_DEPTH = 15 + chain_height = self.nodes[0].getblockcount() + current_height = chain_height + while (current_height >= chain_height - MAX_GETBLOCKTXN_DEPTH): + block_hash = self.nodes[0].getblockhash(current_height) + block = FromHex(CBlock(), self.nodes[0].getblock(block_hash, False)) + + msg = msg_getblocktxn() + msg.block_txn_request = BlockTransactionsRequest(int(block_hash, 16), []) + num_to_request = random.randint(1, len(block.vtx)) + msg.block_txn_request.from_absolute(sorted(random.sample(range(len(block.vtx)), num_to_request))) + self.test_node.send_message(msg) + success = wait_until(lambda: self.test_node.last_blocktxn is not None, timeout=10) + assert(success) + + [tx.calc_sha256() for tx in block.vtx] + with mininode_lock: + assert_equal(self.test_node.last_blocktxn.block_transactions.blockhash, int(block_hash, 16)) + all_indices = msg.block_txn_request.to_absolute() + for index in all_indices: + tx = self.test_node.last_blocktxn.block_transactions.transactions.pop(0) + tx.calc_sha256() + assert_equal(tx.sha256, block.vtx[index].sha256) + self.test_node.last_blocktxn = None + current_height -= 1 + + # Next request should be ignored, as we're past the allowed depth. + block_hash = self.nodes[0].getblockhash(current_height) + msg.block_txn_request = BlockTransactionsRequest(int(block_hash, 16), [0]) + self.test_node.send_and_ping(msg) + with mininode_lock: + assert_equal(self.test_node.last_blocktxn, None) + + def test_compactblocks_not_at_tip(self): + print("Testing compactblock requests/announcements not at chain tip...") + + # Test that requesting old compactblocks doesn't work. + MAX_CMPCTBLOCK_DEPTH = 11 + new_blocks = [] + for i in range(MAX_CMPCTBLOCK_DEPTH): + self.test_node.clear_block_announcement() + new_blocks.append(self.nodes[0].generate(1)[0]) + wait_until(self.test_node.received_block_announcement, timeout=30) + + self.test_node.clear_block_announcement() + self.test_node.send_message(msg_getdata([CInv(4, int(new_blocks[0], 16))])) + success = wait_until(lambda: self.test_node.last_cmpctblock is not None, timeout=30) + assert(success) + + self.test_node.clear_block_announcement() + self.nodes[0].generate(1) + wait_until(self.test_node.received_block_announcement, timeout=30) + self.test_node.clear_block_announcement() + self.test_node.send_message(msg_getdata([CInv(4, int(new_blocks[0], 16))])) + success = wait_until(lambda: self.test_node.last_block is not None, timeout=30) + assert(success) + with mininode_lock: + self.test_node.last_block.block.calc_sha256() + assert_equal(self.test_node.last_block.block.sha256, int(new_blocks[0], 16)) + + # Generate an old compactblock, and verify that it's not accepted. + cur_height = self.nodes[0].getblockcount() + hashPrevBlock = int(self.nodes[0].getblockhash(cur_height-5), 16) + block = self.build_block_on_tip() + block.hashPrevBlock = hashPrevBlock + block.solve() + + comp_block = HeaderAndShortIDs() + comp_block.initialize_from_block(block) + self.test_node.send_and_ping(msg_cmpctblock(comp_block.to_p2p())) + + tips = self.nodes[0].getchaintips() + found = False + for x in tips: + if x["hash"] == block.hash: + assert_equal(x["status"], "headers-only") + found = True + break + assert(found) + + # Requesting this block via getblocktxn should silently fail + # (to avoid fingerprinting attacks). + msg = msg_getblocktxn() + msg.block_txn_request = BlockTransactionsRequest(block.sha256, [0]) + with mininode_lock: + self.test_node.last_blocktxn = None + self.test_node.send_and_ping(msg) + with mininode_lock: + assert(self.test_node.last_blocktxn is None) + + def run_test(self): + # Setup the p2p connections and start up the network thread. + self.test_node = TestNode() + + connections = [] + connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], self.test_node)) + self.test_node.add_connection(connections[0]) + + NetworkThread().start() # Start up network handling in another thread + + # Test logic begins here + self.test_node.wait_for_verack() + + # We will need UTXOs to construct transactions in later tests. + self.make_utxos() + + self.test_sendcmpct() + self.test_compactblock_construction() + self.test_compactblock_requests() + self.test_getblocktxn_requests() + self.test_getblocktxn_handler() + self.test_compactblocks_not_at_tip() + self.test_incorrect_blocktxn_response() + self.test_invalid_cmpctblock_message() + + +if __name__ == '__main__': + CompactBlocksTest().main() |