Line data    Source code

       1             : // Copyright (c) 2022 The Bitcoin Core developers
       2             : // Distributed under the MIT software license, see the accompanying
       3             : // file COPYING or http://www.opensource.org/licenses/mit-license.php.
       4             : 
       5             : #include <chainparams.h>
       6             : #include <node/blockstorage.h>
       7             : #include <node/context.h>
       8             : #include <validation.h>
       9             : 
      10             : #include <boost/test/unit_test.hpp>
      11             : #include <test/util/setup_common.h>
      12             : 
      13             : using node::BlockManager;
      14             : using node::BLOCK_SERIALIZATION_HEADER_SIZE;
      15             : 
      16             : // use BasicTestingSetup here for the data directory configuration, setup, and cleanup
      17         146 : BOOST_FIXTURE_TEST_SUITE(blockmanager_tests, BasicTestingSetup)
      18             : 
      19         149 : BOOST_AUTO_TEST_CASE(blockmanager_find_block_pos)
      20             : {
      21           1 :     const auto params {CreateChainParams(ArgsManager{}, CBaseChainParams::MAIN)};
      22           2 :     node::BlockManager::Options blockman_opts{
      23           1 :         .chainparams = *params,
      24             :     };
      25           1 :     BlockManager blockman{blockman_opts};
      26           1 :     CChain chain {};
      27             :     // simulate adding a genesis block normally
      28           1 :     BOOST_CHECK_EQUAL(blockman.SaveBlockToDisk(params->GenesisBlock(), 0, chain, nullptr).nPos, BLOCK_SERIALIZATION_HEADER_SIZE);
      29             :     // simulate what happens during reindex
      30             :     // simulate a well-formed genesis block being found at offset 8 in the blk00000.dat file
      31             :     // the block is found at offset 8 because there is an 8 byte serialization header
      32             :     // consisting of 4 magic bytes + 4 length bytes before each block in a well-formed blk file.
      33           1 :     FlatFilePos pos{0, BLOCK_SERIALIZATION_HEADER_SIZE};
      34           1 :     BOOST_CHECK_EQUAL(blockman.SaveBlockToDisk(params->GenesisBlock(), 0, chain, &pos).nPos, BLOCK_SERIALIZATION_HEADER_SIZE);
      35             :     // now simulate what happens after reindex for the first new block processed
      36             :     // the actual block contents don't matter, just that it's a block.
      37             :     // verify that the write position is at offset 0x12d.
      38             :     // this is a check to make sure that https://github.com/bitcoin/bitcoin/issues/21379 does not recur
      39             :     // 8 bytes (for serialization header) + 285 (for serialized genesis block) = 293
      40             :     // add another 8 bytes for the second block's serialization header and we get 293 + 8 = 301
      41           1 :     FlatFilePos actual{blockman.SaveBlockToDisk(params->GenesisBlock(), 1, chain, nullptr)};
      42           1 :     BOOST_CHECK_EQUAL(actual.nPos, BLOCK_SERIALIZATION_HEADER_SIZE + ::GetSerializeSize(params->GenesisBlock(), CLIENT_VERSION) + BLOCK_SERIALIZATION_HEADER_SIZE);
      43           1 : }
      44             : 
      45         146 : BOOST_AUTO_TEST_SUITE_END()