Function InitBlockIndex

src/main.cpp:2395–2429

}

bool InitBlockIndex() {
    LOCK(cs_main);
    // Check whether we're already initialized
    if (chainActive.Genesis() != nullptr)
        return true;

    // Use the provided setting for -txindex in the new database
    SysCfg().SetTxIndex(SysCfg().GetBoolArg("-txindex", true));
    pCdMan->pBlockCache->WriteFlag("txindex", SysCfg().IsTxIndex());
    LogPrint(BCLog::INFO, "Initializing databases...\n");

    // Only add the genesis block if not reindexing (in which case we reuse the one already on disk)
    if (!SysCfg().IsReindex()) {
        try {
            CBlock &block = const_cast<CBlock &>(SysCfg().GenesisBlock());
            // Start new block file
            uint32_t nBlockSize = ::GetSerializeSize(block, SER_DISK, CLIENT_VERSION);
            CDiskBlockPos blockPos;
            CValidationState state;
            if (!FindBlockPos(state, blockPos, nBlockSize + 8, 0, block.GetTime()))
                return ERRORMSG("FindBlockPos failed");

            if (!WriteBlockToDisk(block, blockPos))
                return ERRORMSG("writing genesis block to disk failed");

            if (!AddToBlockIndex(block, state, blockPos))
                return ERRORMSG("genesis block not accepted");

        } catch (runtime_error &e) {
            return ERRORMSG("failed to initialize block database: %s", e.what());
        }
    }

    return true;
}

void PrintBlockTree() {
    AssertLockHeld(cs_main);