You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
226 lines
9.8 KiB
226 lines
9.8 KiB
#!/usr/bin/env python3 |
|
# Copyright (c) 2015-2016 The Bitcoin Core developers |
|
# Distributed under the MIT software license, see the accompanying |
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php. |
|
"""Test processing of unrequested blocks. |
|
|
|
Since behavior differs when receiving unrequested blocks from whitelisted peers |
|
versus non-whitelisted peers, this tests the behavior of both (effectively two |
|
separate tests running in parallel). |
|
|
|
Setup: two nodes, node0 and node1, not connected to each other. Node0 does not |
|
whitelist localhost, but node1 does. They will each be on their own chain for |
|
this test. |
|
|
|
We have one NodeConn connection to each, test_node and white_node respectively. |
|
|
|
The test: |
|
1. Generate one block on each node, to leave IBD. |
|
|
|
2. Mine a new block on each tip, and deliver to each node from node's peer. |
|
The tip should advance. |
|
|
|
3. Mine a block that forks the previous block, and deliver to each node from |
|
corresponding peer. |
|
Node0 should not process this block (just accept the header), because it is |
|
unrequested and doesn't have more work than the tip. |
|
Node1 should process because this is coming from a whitelisted peer. |
|
|
|
4. Send another block that builds on the forking block. |
|
Node0 should process this block but be stuck on the shorter chain, because |
|
it's missing an intermediate block. |
|
Node1 should reorg to this longer chain. |
|
|
|
4b.Send 288 more blocks on the longer chain. |
|
Node0 should process all but the last block (too far ahead in height). |
|
Send all headers to Node1, and then send the last block in that chain. |
|
Node1 should accept the block because it's coming from a whitelisted peer. |
|
|
|
5. Send a duplicate of the block in #3 to Node0. |
|
Node0 should not process the block because it is unrequested, and stay on |
|
the shorter chain. |
|
|
|
6. Send Node0 an inv for the height 3 block produced in #4 above. |
|
Node0 should figure out that Node0 has the missing height 2 block and send a |
|
getdata. |
|
|
|
7. Send Node0 the missing block again. |
|
Node0 should process and the tip should advance. |
|
""" |
|
|
|
from test_framework.mininode import * |
|
from test_framework.test_framework import BitcoinTestFramework |
|
from test_framework.util import * |
|
import time |
|
from test_framework.blocktools import create_block, create_coinbase |
|
|
|
class AcceptBlockTest(BitcoinTestFramework): |
|
def add_options(self, parser): |
|
parser.add_option("--testbinary", dest="testbinary", |
|
default=os.getenv("BITCOIND", "bitcoind"), |
|
help="bitcoind binary to test") |
|
|
|
def set_test_params(self): |
|
self.setup_clean_chain = True |
|
self.num_nodes = 2 |
|
self.extra_args = [[], ["-whitelist=127.0.0.1"]] |
|
|
|
def setup_network(self): |
|
# Node0 will be used to test behavior of processing unrequested blocks |
|
# from peers which are not whitelisted, while Node1 will be used for |
|
# the whitelisted case. |
|
self.setup_nodes() |
|
|
|
def run_test(self): |
|
# Setup the p2p connections and start up the network thread. |
|
test_node = NodeConnCB() # connects to node0 (not whitelisted) |
|
white_node = NodeConnCB() # connects to node1 (whitelisted) |
|
|
|
connections = [] |
|
connections.append(NodeConn('127.0.0.1', p2p_port(0), self.nodes[0], test_node)) |
|
connections.append(NodeConn('127.0.0.1', p2p_port(1), self.nodes[1], white_node)) |
|
test_node.add_connection(connections[0]) |
|
white_node.add_connection(connections[1]) |
|
|
|
NetworkThread().start() # Start up network handling in another thread |
|
|
|
# Test logic begins here |
|
test_node.wait_for_verack() |
|
white_node.wait_for_verack() |
|
|
|
# 1. Have both nodes mine a block (leave IBD) |
|
[ n.generate(1) for n in self.nodes ] |
|
tips = [ int("0x" + n.getbestblockhash(), 0) for n in self.nodes ] |
|
|
|
# 2. Send one block that builds on each tip. |
|
# This should be accepted. |
|
blocks_h2 = [] # the height 2 blocks on each node's chain |
|
block_time = int(time.time()) + 1 |
|
for i in range(2): |
|
blocks_h2.append(create_block(tips[i], create_coinbase(2), block_time)) |
|
blocks_h2[i].solve() |
|
block_time += 1 |
|
test_node.send_message(msg_block(blocks_h2[0])) |
|
white_node.send_message(msg_block(blocks_h2[1])) |
|
|
|
for x in [test_node, white_node]: |
|
x.sync_with_ping() |
|
assert_equal(self.nodes[0].getblockcount(), 2) |
|
assert_equal(self.nodes[1].getblockcount(), 2) |
|
self.log.info("First height 2 block accepted by both nodes") |
|
|
|
# 3. Send another block that builds on the original tip. |
|
blocks_h2f = [] # Blocks at height 2 that fork off the main chain |
|
for i in range(2): |
|
blocks_h2f.append(create_block(tips[i], create_coinbase(2), blocks_h2[i].nTime+1)) |
|
blocks_h2f[i].solve() |
|
test_node.send_message(msg_block(blocks_h2f[0])) |
|
white_node.send_message(msg_block(blocks_h2f[1])) |
|
|
|
for x in [test_node, white_node]: |
|
x.sync_with_ping() |
|
for x in self.nodes[0].getchaintips(): |
|
if x['hash'] == blocks_h2f[0].hash: |
|
assert_equal(x['status'], "headers-only") |
|
|
|
for x in self.nodes[1].getchaintips(): |
|
if x['hash'] == blocks_h2f[1].hash: |
|
assert_equal(x['status'], "valid-headers") |
|
|
|
self.log.info("Second height 2 block accepted only from whitelisted peer") |
|
|
|
# 4. Now send another block that builds on the forking chain. |
|
blocks_h3 = [] |
|
for i in range(2): |
|
blocks_h3.append(create_block(blocks_h2f[i].sha256, create_coinbase(3), blocks_h2f[i].nTime+1)) |
|
blocks_h3[i].solve() |
|
test_node.send_message(msg_block(blocks_h3[0])) |
|
white_node.send_message(msg_block(blocks_h3[1])) |
|
|
|
for x in [test_node, white_node]: |
|
x.sync_with_ping() |
|
# Since the earlier block was not processed by node0, the new block |
|
# can't be fully validated. |
|
for x in self.nodes[0].getchaintips(): |
|
if x['hash'] == blocks_h3[0].hash: |
|
assert_equal(x['status'], "headers-only") |
|
|
|
# But this block should be accepted by node0 since it has more work. |
|
self.nodes[0].getblock(blocks_h3[0].hash) |
|
self.log.info("Unrequested more-work block accepted from non-whitelisted peer") |
|
|
|
# Node1 should have accepted and reorged. |
|
assert_equal(self.nodes[1].getblockcount(), 3) |
|
self.log.info("Successfully reorged to length 3 chain from whitelisted peer") |
|
|
|
# 4b. Now mine 288 more blocks and deliver; all should be processed but |
|
# the last (height-too-high) on node0. Node1 should process the tip if |
|
# we give it the headers chain leading to the tip. |
|
tips = blocks_h3 |
|
headers_message = msg_headers() |
|
all_blocks = [] # node0's blocks |
|
for j in range(2): |
|
for i in range(288): |
|
next_block = create_block(tips[j].sha256, create_coinbase(i + 4), tips[j].nTime+1) |
|
next_block.solve() |
|
if j==0: |
|
test_node.send_message(msg_block(next_block)) |
|
all_blocks.append(next_block) |
|
else: |
|
headers_message.headers.append(CBlockHeader(next_block)) |
|
tips[j] = next_block |
|
|
|
time.sleep(2) |
|
# Blocks 1-287 should be accepted, block 288 should be ignored because it's too far ahead |
|
for x in all_blocks[:-1]: |
|
self.nodes[0].getblock(x.hash) |
|
assert_raises_jsonrpc(-1, "Block not found on disk", self.nodes[0].getblock, all_blocks[-1].hash) |
|
|
|
headers_message.headers.pop() # Ensure the last block is unrequested |
|
white_node.send_message(headers_message) # Send headers leading to tip |
|
white_node.send_message(msg_block(tips[1])) # Now deliver the tip |
|
white_node.sync_with_ping() |
|
self.nodes[1].getblock(tips[1].hash) |
|
self.log.info("Unrequested block far ahead of tip accepted from whitelisted peer") |
|
|
|
# 5. Test handling of unrequested block on the node that didn't process |
|
# Should still not be processed (even though it has a child that has more |
|
# work). |
|
test_node.send_message(msg_block(blocks_h2f[0])) |
|
|
|
# Here, if the sleep is too short, the test could falsely succeed (if the |
|
# node hasn't processed the block by the time the sleep returns, and then |
|
# the node processes it and incorrectly advances the tip). |
|
# But this would be caught later on, when we verify that an inv triggers |
|
# a getdata request for this block. |
|
test_node.sync_with_ping() |
|
assert_equal(self.nodes[0].getblockcount(), 2) |
|
self.log.info("Unrequested block that would complete more-work chain was ignored") |
|
|
|
# 6. Try to get node to request the missing block. |
|
# Poke the node with an inv for block at height 3 and see if that |
|
# triggers a getdata on block 2 (it should if block 2 is missing). |
|
with mininode_lock: |
|
# Clear state so we can check the getdata request |
|
test_node.last_message.pop("getdata", None) |
|
test_node.send_message(msg_inv([CInv(2, blocks_h3[0].sha256)])) |
|
|
|
test_node.sync_with_ping() |
|
with mininode_lock: |
|
getdata = test_node.last_message["getdata"] |
|
|
|
# Check that the getdata includes the right block |
|
assert_equal(getdata.inv[0].hash, blocks_h2f[0].sha256) |
|
self.log.info("Inv at tip triggered getdata for unprocessed block") |
|
|
|
# 7. Send the missing block for the third time (now it is requested) |
|
test_node.send_message(msg_block(blocks_h2f[0])) |
|
|
|
test_node.sync_with_ping() |
|
assert_equal(self.nodes[0].getblockcount(), 290) |
|
self.log.info("Successfully reorged to longer chain from non-whitelisted peer") |
|
|
|
[ c.disconnect_node() for c in connections ] |
|
|
|
if __name__ == '__main__': |
|
AcceptBlockTest().main()
|
|
|