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#!/usr/bin/env python3
# Copyright (c) 2014-2021 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 running bitcoind with -reindex and -reindex-chainstate options.
- Start a single node and generate 3 blocks.
- Stop the node and restart it with -reindex. Verify that the node has reindexed up to block 3.
- Stop the node and restart it with -reindex-chainstate. Verify that the node has reindexed up to block 3.
- Verify that out-of-order blocks are correctly processed, see LoadExternalBlockFile()
"""
from test_framework.test_framework import BitcoinTestFramework
from test_framework.p2p import MAGIC_BYTES
from test_framework.util import assert_equal
class ReindexTest(BitcoinTestFramework):
def set_test_params(self):
self.setup_clean_chain = True
self.num_nodes = 1
def reindex(self, justchainstate=False):
self.generatetoaddress(self.nodes[0], 3, self.nodes[0].get_deterministic_priv_key().address)
blockcount = self.nodes[0].getblockcount()
self.stop_nodes()
extra_args = [["-reindex-chainstate" if justchainstate else "-reindex"]]
self.start_nodes(extra_args)
assert_equal(self.nodes[0].getblockcount(), blockcount) # start_node is blocking on reindex
self.log.info("Success")
# Check that blocks can be processed out of order
def out_of_order(self):
# The previous test created 12 blocks
assert_equal(self.nodes[0].getblockcount(), 12)
self.stop_nodes()
# In this test environment, blocks will always be in order (since
# we're generating them rather than getting them from peers), so to
# test out-of-order handling, swap blocks 1 and 2 on disk.
blk0 = self.nodes[0].chain_path / "blocks" / "blk00000.dat"
with open(blk0, 'r+b') as bf:
# Read at least the first few blocks (including genesis)
b = bf.read(2000)
# Find the offsets of blocks 2, 3, and 4 (the first 3 blocks beyond genesis)
# by searching for the regtest marker bytes (see pchMessageStart).
def find_block(b, start):
return b.find(MAGIC_BYTES["regtest"], start)+4
genesis_start = find_block(b, 0)
assert_equal(genesis_start, 4)
b2_start = find_block(b, genesis_start)
b3_start = find_block(b, b2_start)
b4_start = find_block(b, b3_start)
# Blocks 2 and 3 should be the same size.
assert_equal(b3_start-b2_start, b4_start-b3_start)
# Swap the second and third blocks (don't disturb the genesis block).
bf.seek(b2_start)
bf.write(b[b3_start:b4_start])
bf.write(b[b2_start:b3_start])
# The reindexing code should detect and accommodate out of order blocks.
with self.nodes[0].assert_debug_log([
'LoadExternalBlockFile: Out of order block',
'LoadExternalBlockFile: Processing out of order child',
]):
extra_args = [["-reindex"]]
self.start_nodes(extra_args)
# All blocks should be accepted and processed.
assert_equal(self.nodes[0].getblockcount(), 12)
def run_test(self):
self.reindex(False)
self.reindex(True)
self.reindex(False)
self.reindex(True)
self.out_of_order()
if __name__ == '__main__':
ReindexTest().main()
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