mirror of https://github.com/bitcoin/bitcoin
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.
301 lines
13 KiB
301 lines
13 KiB
#!/usr/bin/env python3
|
|
# Copyright (c) 2015-2020 The Bitcoin Core developers
|
|
# Distributed under the MIT software license, see the accompanying
|
|
# file COPYING or http://www.opensource.org/licenses/mit-license.php.
|
|
"""Test processing of unrequested blocks.
|
|
|
|
Setup: two nodes, node0+node1, not connected to each other. Node1 will have
|
|
nMinimumChainWork set to 0x10, so it won't process low-work unrequested blocks.
|
|
|
|
We have one P2PInterface connection to node0 called test_node, and one to node1
|
|
called min_work_node.
|
|
|
|
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 for node0, but node1 should skip processing due to
|
|
nMinimumChainWork.
|
|
|
|
Node1 is unused in tests 3-7:
|
|
|
|
3. Mine a block that forks from the genesis block, and deliver to test_node.
|
|
Node0 should not process this block (just accept the header), because it
|
|
is unrequested and doesn't have more or equal work to the tip.
|
|
|
|
4a,b. Send another two blocks that build on the forking block.
|
|
Node0 should process the second block but be stuck on the shorter chain,
|
|
because it's missing an intermediate block.
|
|
|
|
4c.Send 288 more blocks on the longer chain (the number of blocks ahead
|
|
we currently store).
|
|
Node0 should process all but the last block (too far ahead in height).
|
|
|
|
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.
|
|
|
|
8. Create a fork which is invalid at a height longer than the current chain
|
|
(ie to which the node will try to reorg) but which has headers built on top
|
|
of the invalid block. Check that we get disconnected if we send more headers
|
|
on the chain the node now knows to be invalid.
|
|
|
|
9. Test Node1 is able to sync when connected to node0 (which should have sufficient
|
|
work on its chain).
|
|
"""
|
|
|
|
import time
|
|
|
|
from test_framework.blocktools import create_block, create_coinbase, create_tx_with_script
|
|
from test_framework.messages import CBlockHeader, CInv, MSG_BLOCK, msg_block, msg_headers, msg_inv
|
|
from test_framework.mininode import mininode_lock, P2PInterface
|
|
from test_framework.test_framework import BitcoinTestFramework
|
|
from test_framework.util import (
|
|
assert_equal,
|
|
assert_raises_rpc_error,
|
|
connect_nodes,
|
|
)
|
|
|
|
|
|
class AcceptBlockTest(BitcoinTestFramework):
|
|
def set_test_params(self):
|
|
self.setup_clean_chain = True
|
|
self.num_nodes = 2
|
|
self.extra_args = [[], ["-minimumchainwork=0x10"]]
|
|
|
|
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.
|
|
# Node2 will be used for non-whitelisted peers to test the interaction
|
|
# with nMinimumChainWork.
|
|
self.setup_nodes()
|
|
|
|
def run_test(self):
|
|
# Setup the p2p connections
|
|
# test_node connects to node0 (not whitelisted)
|
|
test_node = self.nodes[0].add_p2p_connection(P2PInterface())
|
|
# min_work_node connects to node1 (whitelisted)
|
|
min_work_node = self.nodes[1].add_p2p_connection(P2PInterface())
|
|
|
|
# 1. Have nodes mine a block (leave IBD)
|
|
[n.generatetoaddress(1, n.get_deterministic_priv_key().address) 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 by node0
|
|
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_and_ping(msg_block(blocks_h2[0]))
|
|
min_work_node.send_and_ping(msg_block(blocks_h2[1]))
|
|
|
|
assert_equal(self.nodes[0].getblockcount(), 2)
|
|
assert_equal(self.nodes[1].getblockcount(), 1)
|
|
self.log.info("First height 2 block accepted by node0; correctly rejected by node1")
|
|
|
|
# 3. Send another block that builds on genesis.
|
|
block_h1f = create_block(int("0x" + self.nodes[0].getblockhash(0), 0), create_coinbase(1), block_time)
|
|
block_time += 1
|
|
block_h1f.solve()
|
|
test_node.send_and_ping(msg_block(block_h1f))
|
|
|
|
tip_entry_found = False
|
|
for x in self.nodes[0].getchaintips():
|
|
if x['hash'] == block_h1f.hash:
|
|
assert_equal(x['status'], "headers-only")
|
|
tip_entry_found = True
|
|
assert tip_entry_found
|
|
assert_raises_rpc_error(-1, "Block not found on disk", self.nodes[0].getblock, block_h1f.hash)
|
|
|
|
# 4. Send another two block that build on the fork.
|
|
block_h2f = create_block(block_h1f.sha256, create_coinbase(2), block_time)
|
|
block_time += 1
|
|
block_h2f.solve()
|
|
test_node.send_and_ping(msg_block(block_h2f))
|
|
|
|
# Since the earlier block was not processed by node, the new block
|
|
# can't be fully validated.
|
|
tip_entry_found = False
|
|
for x in self.nodes[0].getchaintips():
|
|
if x['hash'] == block_h2f.hash:
|
|
assert_equal(x['status'], "headers-only")
|
|
tip_entry_found = True
|
|
assert tip_entry_found
|
|
|
|
# But this block should be accepted by node since it has equal work.
|
|
self.nodes[0].getblock(block_h2f.hash)
|
|
self.log.info("Second height 2 block accepted, but not reorg'ed to")
|
|
|
|
# 4b. Now send another block that builds on the forking chain.
|
|
block_h3 = create_block(block_h2f.sha256, create_coinbase(3), block_h2f.nTime+1)
|
|
block_h3.solve()
|
|
test_node.send_and_ping(msg_block(block_h3))
|
|
|
|
# Since the earlier block was not processed by node, the new block
|
|
# can't be fully validated.
|
|
tip_entry_found = False
|
|
for x in self.nodes[0].getchaintips():
|
|
if x['hash'] == block_h3.hash:
|
|
assert_equal(x['status'], "headers-only")
|
|
tip_entry_found = True
|
|
assert tip_entry_found
|
|
self.nodes[0].getblock(block_h3.hash)
|
|
|
|
# But this block should be accepted by node since it has more work.
|
|
self.nodes[0].getblock(block_h3.hash)
|
|
self.log.info("Unrequested more-work block accepted")
|
|
|
|
# 4c. Now mine 288 more blocks and deliver; all should be processed but
|
|
# the last (height-too-high) on node (as long as it is not missing any headers)
|
|
tip = block_h3
|
|
all_blocks = []
|
|
for i in range(288):
|
|
next_block = create_block(tip.sha256, create_coinbase(i + 4), tip.nTime+1)
|
|
next_block.solve()
|
|
all_blocks.append(next_block)
|
|
tip = next_block
|
|
|
|
# Now send the block at height 5 and check that it wasn't accepted (missing header)
|
|
test_node.send_and_ping(msg_block(all_blocks[1]))
|
|
assert_raises_rpc_error(-5, "Block not found", self.nodes[0].getblock, all_blocks[1].hash)
|
|
assert_raises_rpc_error(-5, "Block not found", self.nodes[0].getblockheader, all_blocks[1].hash)
|
|
|
|
# The block at height 5 should be accepted if we provide the missing header, though
|
|
headers_message = msg_headers()
|
|
headers_message.headers.append(CBlockHeader(all_blocks[0]))
|
|
test_node.send_message(headers_message)
|
|
test_node.send_and_ping(msg_block(all_blocks[1]))
|
|
self.nodes[0].getblock(all_blocks[1].hash)
|
|
|
|
# Now send the blocks in all_blocks
|
|
for i in range(288):
|
|
test_node.send_message(msg_block(all_blocks[i]))
|
|
test_node.sync_with_ping()
|
|
|
|
# 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_rpc_error(-1, "Block not found on disk", self.nodes[0].getblock, all_blocks[-1].hash)
|
|
|
|
# 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).
|
|
|
|
# The node should have requested the blocks at some point, so
|
|
# disconnect/reconnect first
|
|
|
|
self.nodes[0].disconnect_p2ps()
|
|
self.nodes[1].disconnect_p2ps()
|
|
|
|
test_node = self.nodes[0].add_p2p_connection(P2PInterface())
|
|
|
|
test_node.send_and_ping(msg_block(block_h1f))
|
|
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(MSG_BLOCK, block_h3.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, block_h1f.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_and_ping(msg_block(block_h1f))
|
|
assert_equal(self.nodes[0].getblockcount(), 290)
|
|
self.nodes[0].getblock(all_blocks[286].hash)
|
|
assert_equal(self.nodes[0].getbestblockhash(), all_blocks[286].hash)
|
|
assert_raises_rpc_error(-1, "Block not found on disk", self.nodes[0].getblock, all_blocks[287].hash)
|
|
self.log.info("Successfully reorged to longer chain from non-whitelisted peer")
|
|
|
|
# 8. Create a chain which is invalid at a height longer than the
|
|
# current chain, but which has more blocks on top of that
|
|
block_289f = create_block(all_blocks[284].sha256, create_coinbase(289), all_blocks[284].nTime+1)
|
|
block_289f.solve()
|
|
block_290f = create_block(block_289f.sha256, create_coinbase(290), block_289f.nTime+1)
|
|
block_290f.solve()
|
|
block_291 = create_block(block_290f.sha256, create_coinbase(291), block_290f.nTime+1)
|
|
# block_291 spends a coinbase below maturity!
|
|
block_291.vtx.append(create_tx_with_script(block_290f.vtx[0], 0, script_sig=b"42", amount=1))
|
|
block_291.hashMerkleRoot = block_291.calc_merkle_root()
|
|
block_291.solve()
|
|
block_292 = create_block(block_291.sha256, create_coinbase(292), block_291.nTime+1)
|
|
block_292.solve()
|
|
|
|
# Now send all the headers on the chain and enough blocks to trigger reorg
|
|
headers_message = msg_headers()
|
|
headers_message.headers.append(CBlockHeader(block_289f))
|
|
headers_message.headers.append(CBlockHeader(block_290f))
|
|
headers_message.headers.append(CBlockHeader(block_291))
|
|
headers_message.headers.append(CBlockHeader(block_292))
|
|
test_node.send_and_ping(headers_message)
|
|
|
|
tip_entry_found = False
|
|
for x in self.nodes[0].getchaintips():
|
|
if x['hash'] == block_292.hash:
|
|
assert_equal(x['status'], "headers-only")
|
|
tip_entry_found = True
|
|
assert tip_entry_found
|
|
assert_raises_rpc_error(-1, "Block not found on disk", self.nodes[0].getblock, block_292.hash)
|
|
|
|
test_node.send_message(msg_block(block_289f))
|
|
test_node.send_and_ping(msg_block(block_290f))
|
|
|
|
self.nodes[0].getblock(block_289f.hash)
|
|
self.nodes[0].getblock(block_290f.hash)
|
|
|
|
test_node.send_message(msg_block(block_291))
|
|
|
|
# At this point we've sent an obviously-bogus block, wait for full processing
|
|
# without assuming whether we will be disconnected or not
|
|
try:
|
|
# Only wait a short while so the test doesn't take forever if we do get
|
|
# disconnected
|
|
test_node.sync_with_ping(timeout=1)
|
|
except AssertionError:
|
|
test_node.wait_for_disconnect()
|
|
|
|
self.nodes[0].disconnect_p2ps()
|
|
test_node = self.nodes[0].add_p2p_connection(P2PInterface())
|
|
|
|
# We should have failed reorg and switched back to 290 (but have block 291)
|
|
assert_equal(self.nodes[0].getblockcount(), 290)
|
|
assert_equal(self.nodes[0].getbestblockhash(), all_blocks[286].hash)
|
|
assert_equal(self.nodes[0].getblock(block_291.hash)["confirmations"], -1)
|
|
|
|
# Now send a new header on the invalid chain, indicating we're forked off, and expect to get disconnected
|
|
block_293 = create_block(block_292.sha256, create_coinbase(293), block_292.nTime+1)
|
|
block_293.solve()
|
|
headers_message = msg_headers()
|
|
headers_message.headers.append(CBlockHeader(block_293))
|
|
test_node.send_message(headers_message)
|
|
test_node.wait_for_disconnect()
|
|
|
|
# 9. Connect node1 to node0 and ensure it is able to sync
|
|
connect_nodes(self.nodes[0], 1)
|
|
self.sync_blocks([self.nodes[0], self.nodes[1]])
|
|
self.log.info("Successfully synced nodes 1 and 0")
|
|
|
|
if __name__ == '__main__':
|
|
AcceptBlockTest().main()
|