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#!/usr/bin/env python3
# Copyright (c) 2024 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 support for XORed block data and undo files (`-blocksxor` option)."""
from test_framework.test_framework import BitcoinTestFramework
from test_framework.test_node import ErrorMatch
from test_framework.util import (
assert_equal,
assert_greater_than,
util_xor,
)
from test_framework.wallet import MiniWallet
class BlocksXORTest(BitcoinTestFramework):
def set_test_params(self):
self.num_nodes = 1
self.extra_args = [[
'-blocksxor=1',
'-fastprune=1', # use smaller block files
'-datacarriersize=100000', # needed to pad transaction with MiniWallet
]]
def run_test(self):
self.log.info("Mine some blocks, to create multiple blk*.dat/rev*.dat files")
node = self.nodes[0]
wallet = MiniWallet(node)
for _ in range(5):
wallet.send_self_transfer(from_node=node, target_weight=80000)
self.generate(wallet, 1)
block_files = list(node.blocks_path.glob('blk[0-9][0-9][0-9][0-9][0-9].dat'))
undo_files = list(node.blocks_path.glob('rev[0-9][0-9][0-9][0-9][0-9].dat'))
assert_equal(len(block_files), len(undo_files))
assert_greater_than(len(block_files), 1) # we want at least one full block file
self.log.info("Shut down node and un-XOR block/undo files manually")
self.stop_node(0)
xor_key = node.read_xor_key()
for data_file in sorted(block_files + undo_files):
self.log.debug(f"Rewriting file {data_file}...")
with open(data_file, 'rb+') as f:
xored_data = f.read()
f.seek(0)
f.write(util_xor(xored_data, xor_key, offset=0))
self.log.info("Check that restarting with 'blocksxor=0' fails if XOR key is present")
node.assert_start_raises_init_error(['-blocksxor=0'],
'The blocksdir XOR-key can not be disabled when a random key was already stored!',
match=ErrorMatch.PARTIAL_REGEX)
self.log.info("Delete XOR key, restart node with '-blocksxor=0', check blk*.dat/rev*.dat file integrity")
node.blocks_key_path.unlink()
self.start_node(0, extra_args=['-blocksxor=0'])
# checklevel=2 -> verify block validity + undo data
# nblocks=0 -> verify all blocks
node.verifychain(checklevel=2, nblocks=0)
if __name__ == '__main__':
BlocksXORTest(__file__).main()
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